chore: bump yt-dlp to 2026.6.9

chore: bump yt-dlp to 2026.3.17

.dockerignore

@@ -1,89 +0,0 @@
-.gitea/
-.github/
-.venv/
-./bin/
-# Python bytecode
-__pycache__/
-*.py[cod]
-*$py.class
-
-# C extensions
-*.so
-
-# Distribution / packaging
-build/
-dist/
-*.egg-info/
-.eggs/
-pip-wheel-metadata/
-
-# Installer logs
-pip-log.txt
-
-# Virtual environments
-venv/
-ENV/
-env/
-env.bak/
-venv.bak/
-
-# pyenv
-.python-version
-
-# Test and coverage
-.pytest_cache/
-.coverage
-coverage.xml
-htmlcov/
-
-# Type checkers
-.mypy_cache/
-.dmypy.json
-dmypy.json
-
-# Pyright
-.pyright/
-
-# IDEs and editors
-.vscode/
-.idea/
-*.sublime-workspace
-*.sublime-project
-
-# OS files
-.DS_Store
-Thumbs.db
-
-# Logs
-*.log
-logs/
-
-# Local config and secrets (do NOT include if you intentionally want them in image)
-config/yt-playlist-config.json
-.env
-.env.*
-*.secret
-secrets.json
-
-# Docker files and Compose (ignore local overrides)
-Dockerfile*
-docker-compose*.yml
-docker-compose*.yaml
-
-# Git and VCS
-.git/
-.gitignore
-
-# Gitea and CI artifacts
-.gitea/workflows/
-dist/
-
-# Node (if present)
-node_modules/
-
-# Poetry / Pipenv
-Pipfile.lock
-poetry.lock
-
-# compiled python
-*.pyc

.github/dependabot.yml

@@ -0,0 +1,16 @@
+version: 2
+updates:
+  - package-ecosystem: pip
+    directory: "/"
+    schedule:
+      interval: daily
+      time: "10:00"
+    groups:
+      python-packages:
+        patterns:
+          - "*"
+        
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "weekly"

.github/workflows/build-release.yml

@@ -0,0 +1,307 @@
+name: Build & Release
+
+on:
+  workflow_dispatch:
+    inputs:
+      tag:
+        description: "Tag to create (e.g., v2.0.0)"
+        required: true
+        default: "v2.0.0"
+        type: string
+      force_tag:
+        description: "Recreate tag if it already exists"
+        required: false
+        default: false
+        type: boolean
+      draft:
+        description: "Create release as draft"
+        required: false
+        default: true
+        type: boolean
+
+
+permissions:
+  contents: write
+
+jobs:
+  tag:
+    name: Create tag
+    needs: test
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v6
+        with:
+          fetch-depth: 0
+
+      - name: Validate input tag
+        shell: bash
+        run: |
+          set -euo pipefail
+          TAG="${{ inputs.tag }}"
+          if [[ -z "$TAG" ]]; then
+            echo "tag is required" >&2
+            exit 1
+          fi
+          if [[ "$TAG" != v* ]]; then
+            echo "tag must start with 'v' (got: $TAG)" >&2
+            exit 1
+          fi
+
+      - name: Create/push tag
+        shell: bash
+        env:
+          TAG: ${{ inputs.tag }}
+          FORCE: ${{ inputs.force_tag }}
+        run: |
+          set -euo pipefail
+
+          if git rev-parse -q --verify "refs/tags/${TAG}" >/dev/null; then
+            if [[ "${FORCE}" != "true" ]]; then
+              echo "Tag ${TAG} already exists. Re-run with force_tag=true to recreate." >&2
+              exit 1
+            fi
+            git tag -d "${TAG}" || true
+            git push origin ":refs/tags/${TAG}" || true
+          fi
+
+          git tag "${TAG}" "${GITHUB_SHA}"
+          git push origin "${TAG}"
+
+  test:
+    name: Unit tests
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v6
+      - uses: actions/setup-python@v6
+        with:
+          python-version: "3.12"
+          cache: "pip"
+      - name: Install
+        run: |
+          python -m pip install --upgrade pip
+          pip install -e ".[dev]" || pip install -e .
+          pip install pytest
+      - name: Run tests
+        env:
+          PYTHONPATH: ${{ github.workspace }}/src
+        run: pytest
+
+  build:
+    name: Build packages
+    needs: tag
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [windows-latest, ubuntu-latest]
+        ffmpeg: [bundled, none]
+
+    steps:
+      - uses: actions/checkout@v6
+
+      - name: Derive version
+        id: version
+        shell: bash
+        run: |
+          TAG="${{ inputs.tag }}"
+          echo "tag=${TAG}" >> "$GITHUB_OUTPUT"
+          echo "version=${TAG#v}" >> "$GITHUB_OUTPUT"
+
+      - name: Write bundled version file
+        shell: bash
+        run: |
+          set -euo pipefail
+          printf '%s\n' "${{ steps.version.outputs.version }}" > version.txt
+
+      - uses: actions/setup-python@v6
+        with:
+          python-version: "3.12"
+          cache: "pip" 
+
+      - name: Install build deps
+        run: |
+          python -m pip install --upgrade pip
+          pip install -e . 
+          pip install pyinstaller
+
+      - name: Build binary (Windows)
+        if: runner.os == 'Windows'
+        shell: pwsh
+        run: |
+          $ErrorActionPreference = "Stop"
+          $ws = "${{ github.workspace }}"
+          pyinstaller --noconfirm --onefile --noconsole --name "ytpl-sync" --icon "$ws/assets/icon.ico" --add-data "$ws/assets/icon.png;assets" --add-data "$ws/version.txt;." --distpath "dist/pyinstaller" --workpath "build/pyinstaller" --specpath "build/pyinstaller" --paths "src" "ytpl-sync-entry.py"
+
+      - name: Build binary (Linux)
+        if: runner.os == 'Linux'
+        shell: bash
+        run: |
+          set -euo pipefail
+          pyinstaller --noconfirm --onefile --noconsole --name "ytpl-sync" --icon "${GITHUB_WORKSPACE}/assets/icon.png" --add-data "${GITHUB_WORKSPACE}/assets/icon.png:assets" --add-data "${GITHUB_WORKSPACE}/version.txt:." --distpath "dist/pyinstaller" --workpath "build/pyinstaller" --specpath "build/pyinstaller" --paths "src" "ytpl-sync-entry.py"
+
+      - name: Stage package
+        shell: bash
+        run: |
+          set -euo pipefail
+
+          OS="${{ runner.os }}"
+          FFMPEG="${{ matrix.ffmpeg }}"
+          VERSION="${{ steps.version.outputs.version }}"
+
+          PKG_ROOT="$GITHUB_WORKSPACE/package"
+          rm -rf "$PKG_ROOT"
+          mkdir -p "$PKG_ROOT/config" "$PKG_ROOT/bin"
+
+          # Binary
+          if [[ "$OS" == "Windows" ]]; then
+            cp "$GITHUB_WORKSPACE/dist/pyinstaller/ytpl-sync.exe" "$PKG_ROOT/ytpl-sync.exe"
+          else
+            cp "$GITHUB_WORKSPACE/dist/pyinstaller/ytpl-sync" "$PKG_ROOT/ytpl-sync.exe"
+            chmod +x "$PKG_ROOT/ytpl-sync.exe"
+          fi
+
+          # Config: ship example as the default config
+          python - <<'PY'
+          import json
+          import os
+          from pathlib import Path
+
+          workspace = Path(os.environ["GITHUB_WORKSPACE"])
+          pkg_root = workspace / "package"
+          src = workspace / "config" / "yt-playlist-config.example.json"
+          dst = pkg_root / "config" / "yt-playlist-config.json"
+          data = json.loads(src.read_text(encoding="utf-8"))
+
+          os_name = os.environ["RUNNER_OS"]
+          ffmpeg_mode = os.environ["FFMPEG_MODE"]
+          if ffmpeg_mode == "bundled":
+            data["ffmpeg_path"] = "./bin/ffmpeg.exe" if os_name == "Windows" else "./bin/ffmpeg"
+          else:
+            data["ffmpeg_path"] = "ffmpeg"
+
+          dst.write_text(json.dumps(data, indent=2) + "\n", encoding="utf-8")
+          PY
+        env:
+          FFMPEG_MODE: ${{ matrix.ffmpeg }}
+
+      - name: Bundle FFmpeg (Windows)
+        if: runner.os == 'Windows' && matrix.ffmpeg == 'bundled'
+        shell: pwsh
+        run: |
+          $ErrorActionPreference = "Stop"
+          New-Item -ItemType Directory -Force -Path "package/bin" | Out-Null
+          Invoke-WebRequest -Uri "https://www.gyan.dev/ffmpeg/builds/ffmpeg-release-essentials.zip" -OutFile "ffmpeg.zip"
+          Expand-Archive "ffmpeg.zip" -DestinationPath "ffmpeg_tmp"
+          $ffmpegExe = Get-ChildItem -Path "ffmpeg_tmp" -Filter "ffmpeg.exe" -Recurse | Select-Object -First 1
+          if (-not $ffmpegExe) { throw "ffmpeg.exe not found in archive" }
+          Copy-Item $ffmpegExe.FullName "package/bin/ffmpeg.exe"
+          Remove-Item -Force "ffmpeg.zip"
+          Remove-Item -Recurse -Force "ffmpeg_tmp"
+
+      - name: Bundle FFmpeg (Linux)
+        if: runner.os == 'Linux' && matrix.ffmpeg == 'bundled'
+        shell: bash
+        run: |
+          set -euo pipefail
+          mkdir -p package/bin ffmpeg_tmp
+          curl -L "https://johnvansickle.com/ffmpeg/releases/ffmpeg-release-amd64-static.tar.xz" -o ffmpeg.tar.xz
+          tar -xf ffmpeg.tar.xz -C ffmpeg_tmp --strip-components=1
+          mv ffmpeg_tmp/ffmpeg package/bin/ffmpeg
+          chmod +x package/bin/ffmpeg
+
+      - name: Archive (Windows)
+        if: runner.os == 'Windows'
+        shell: pwsh
+        run: |
+          $ErrorActionPreference = "Stop"
+          $version = "${{ steps.version.outputs.version }}"
+          $variant = "${{ matrix.ffmpeg }}"
+          if ($variant -eq "bundled") {
+            $name = "ytpl-sync-windows-$version-ffmpeg.zip"
+          } else {
+            $name = "ytpl-sync-windows-$version.zip"
+          }
+          Compress-Archive -Path "package/*" -DestinationPath $name
+
+      - name: Archive (Linux)
+        if: runner.os == 'Linux'
+        shell: bash
+        run: |
+          set -euo pipefail
+          version="${{ steps.version.outputs.version }}"
+          variant="${{ matrix.ffmpeg }}"
+          if [[ "$variant" == "bundled" ]]; then
+            name="ytpl-sync-linux-${version}-ffmpeg.tar.gz"
+          else
+            name="ytpl-sync-linux-${version}.tar.gz"
+          fi
+          tar -C package -czf "$name" .
+
+      - name: Upload artifact
+        uses: actions/upload-artifact@v7
+        with:
+          name: packages-${{ runner.os }}-${{ matrix.ffmpeg }}
+          path: |
+            ytpl-sync-*.zip
+            ytpl-sync-*.tar.gz
+
+  release:
+    name: Create Release
+    needs: build
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v6
+        with:
+          fetch-depth: 0
+
+      - name: Download artifacts
+        uses: actions/download-artifact@v8
+        with:
+          path: artifacts
+
+      - name: Generate release notes
+        shell: bash
+        env:
+          TAG: ${{ inputs.tag }}
+        run: |
+          set -euo pipefail
+          git fetch --tags --force
+
+          VERSION="${TAG#v}"
+          REPO="${GITHUB_REPOSITORY}"
+
+          prev_tag="$(git tag --sort=-creatordate | grep -Fxv "$TAG" | head -n 1 || true)"
+
+          {
+            echo "### Changes"
+            echo
+            if [[ -n "$prev_tag" ]]; then
+              echo "Compared to \`$prev_tag\`:"
+              echo
+              git log "${prev_tag}..${TAG}" --no-merges --pretty=format:'- %s (%h)' || true
+            else
+              echo "First tagged release:"
+              echo
+              git log "${TAG}" --no-merges --pretty=format:'- %s (%h)' || true
+            fi
+
+            echo
+            echo
+            echo "### Reports"
+            echo "![Downloads](https://img.shields.io/github/downloads/${REPO}/${TAG}/total?style=flat-square&logo=github&label=Downloads)"
+            echo "![Linux FFmpeg](https://img.shields.io/github/downloads/${REPO}/${TAG}/ytpl-sync-linux-${VERSION}-ffmpeg.tar.gz?style=flat-square&label=Linux+FFmpeg)"
+            echo "![Linux](https://img.shields.io/github/downloads/${REPO}/${TAG}/ytpl-sync-linux-${VERSION}.tar.gz?style=flat-square&label=Linux)"
+            echo "![Windows FFmpeg](https://img.shields.io/github/downloads/${REPO}/${TAG}/ytpl-sync-windows-${VERSION}-ffmpeg.zip?style=flat-square&label=Windows+FFmpeg)"
+            echo "![Windows](https://img.shields.io/github/downloads/${REPO}/${TAG}/ytpl-sync-windows-${VERSION}.zip?style=flat-square&label=Windows)"
+            echo
+          } > release-notes.md
+
+      - name: Create release
+        uses: softprops/action-gh-release@v3
+        with:
+          tag_name: ${{ inputs.tag }}
+          draft: ${{ inputs.draft }}
+          body_path: release-notes.md
+          files: |
+            artifacts/**/*.zip
+            artifacts/**/*.tar.gz

.github/workflows/build.yml

@@ -1,298 +0,0 @@
-name: Build Release
-
-on:
-  workflow_dispatch:
-    inputs:
-      tag:
-        description: "Release tag (e.g., v0.1.0)"
-        required: true
-        type: string
-
-permissions:
-  contents: write
-  packages: write
-
-jobs:
-  build-windows-package:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v5
-
-      - name: Install dependencies
-        run: sudo apt update && sudo apt install -y unzip zip curl
-
-      - name: Get version from tag
-        id: version
-        shell: bash
-        run: |
-          VERSION="${{ inputs.tag }}"
-          VERSION="${VERSION#v}"
-          echo "version=$VERSION" >> $GITHUB_OUTPUT
-
-      - name: Prepare Windows package
-        run: |
-          set -e
-          VERSION="${{ steps.version.outputs.version }}"
-          mkdir -p "$GITHUB_WORKSPACE/dist/windows/bin"
-          cp "$GITHUB_WORKSPACE/yt-playlist-main.py" "$GITHUB_WORKSPACE/dist/windows/"
-
-          # yt-dlp
-          curl -fL --retry 3 -H "User-Agent: github-actions" \
-            -o "$GITHUB_WORKSPACE/dist/windows/bin/yt-dlp.exe" \
-            https://github.com/yt-dlp/yt-dlp/releases/latest/download/yt-dlp.exe
-
-          # FFmpeg Windows static
-          curl -fL --retry 3 -H "User-Agent: github-actions" \
-            -o "$GITHUB_WORKSPACE/dist/windows/ffmpeg.zip" \
-            https://www.gyan.dev/ffmpeg/builds/ffmpeg-release-essentials.zip
-          unzip -q "$GITHUB_WORKSPACE/dist/windows/ffmpeg.zip" -d "$GITHUB_WORKSPACE/dist/windows/ffmpeg_temp"
-          mv $(find "$GITHUB_WORKSPACE/dist/windows/ffmpeg_temp" -name ffmpeg.exe | head -n 1) "$GITHUB_WORKSPACE/dist/windows/bin/ffmpeg.exe"
-
-          # aria2c Windows static
-          curl -fL --retry 3 -H "User-Agent: github-actions" \
-            -o "$GITHUB_WORKSPACE/dist/windows/aria2c.zip" \
-            https://github.com/aria2/aria2/releases/download/release-1.37.0/aria2-1.37.0-win-64bit-build1.zip
-          unzip "$GITHUB_WORKSPACE/dist/windows/aria2c.zip" -d "$GITHUB_WORKSPACE/dist/windows/"
-          mv "$GITHUB_WORKSPACE/dist/windows/aria2-1.37.0-win-64bit-build1/aria2c.exe" "$GITHUB_WORKSPACE/dist/windows/bin/aria2c.exe"
-
-          rm -rf "$GITHUB_WORKSPACE/dist/windows/ffmpeg_temp" "$GITHUB_WORKSPACE/dist/windows/aria2-1.37.0-win-64bit-build1" "$GITHUB_WORKSPACE/dist/windows/ffmpeg.zip" "$GITHUB_WORKSPACE/dist/windows/aria2c.zip"
-
-          # Create windows archive
-          cd "$GITHUB_WORKSPACE/dist/windows"
-          ZIP_NAME="yt-playlist-windows-${VERSION}.zip"
-          zip -r "$GITHUB_WORKSPACE/$ZIP_NAME" *
-          echo "ZIP_PATH=$GITHUB_WORKSPACE/$ZIP_NAME" >> $GITHUB_ENV
-
-      - name: Upload Windows artifact
-        uses: actions/upload-artifact@v6
-        with:
-          name: windows-release
-          path: ${{ github.workspace }}/yt-playlist-windows-*.zip
-
-  build-linux-package:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v5
-
-      - name: Get version from tag
-        id: version
-        shell: bash
-        run: |
-          VERSION="${{ inputs.tag }}"
-          VERSION="${VERSION#v}"
-          echo "version=$VERSION" >> $GITHUB_OUTPUT
-
-      - name: Install dependencies
-        run: |
-          sudo apt update
-          sudo apt install -y unzip zip curl wget build-essential pkg-config libssl-dev zlib1g-dev
-
-      - name: Prepare workspace
-        run: |
-          set -e
-          mkdir -p "$GITHUB_WORKSPACE/dist/linux/bin"
-          cp "$GITHUB_WORKSPACE/yt-playlist-main.py" "$GITHUB_WORKSPACE/dist/linux/"
-
-      - name: Download yt-dlp
-        run: |
-          curl -fL --retry 3 -H "User-Agent: github-actions" \
-            -o "$GITHUB_WORKSPACE/dist/linux/bin/yt-dlp" \
-            https://github.com/yt-dlp/yt-dlp/releases/latest/download/yt-dlp_linux
-          chmod +x "$GITHUB_WORKSPACE/dist/linux/bin/yt-dlp"
-
-      - name: Download FFmpeg static
-        run: |
-          curl -fL --retry 3 -H "User-Agent: github-actions" \
-            -o "$GITHUB_WORKSPACE/dist/linux/ffmpeg.tar.xz" \
-            https://johnvansickle.com/ffmpeg/releases/ffmpeg-release-amd64-static.tar.xz
-          mkdir -p "$GITHUB_WORKSPACE/dist/linux/ffmpeg_temp"
-          tar -xf "$GITHUB_WORKSPACE/dist/linux/ffmpeg.tar.xz" -C "$GITHUB_WORKSPACE/dist/linux/ffmpeg_temp" --strip-components=1
-          mv "$GITHUB_WORKSPACE/dist/linux/ffmpeg_temp/ffmpeg" "$GITHUB_WORKSPACE/dist/linux/bin/ffmpeg"
-          chmod +x "$GITHUB_WORKSPACE/dist/linux/bin/ffmpeg"
-      
-      - name: Restore aria2 cache
-        id: aria2-cache
-        uses: actions/cache@v4
-        with:
-          path: dist/linux/bin/aria2c
-          key: aria2c-${{ runner.os }}-1.37.0
-            
-      - name: Build aria2c if not cached
-        if: steps.aria2-cache.outputs.cache-hit != 'true'   
-        run: |
-          set -e
-          mkdir -p "$GITHUB_WORKSPACE/dist/linux/bin"
-
-          mkdir -p "$GITHUB_WORKSPACE/dist/linux/aria2c_build"
-          cd "$GITHUB_WORKSPACE"
-          wget https://github.com/aria2/aria2/releases/download/release-1.37.0/aria2-1.37.0.tar.gz
-          tar -xzf aria2-1.37.0.tar.gz
-          cd aria2-1.37.0
-          CFLAGS="-Os -s" LDFLAGS="-static" ./configure \
-            --enable-static --disable-shared \
-            --disable-libaria2 --without-ca-bundle \
-            --without-libnettle --without-libgcrypt \
-            --without-libssh2 --without-libexpat \
-            --without-libxml2 --without-libsqlite3 \
-            --with-openssl
-          make -j"$(nproc)"
-          strip src/aria2c
-          cp src/aria2c "$GITHUB_WORKSPACE/dist/linux/bin/aria2c"
-          chmod +x "$GITHUB_WORKSPACE/dist/linux/bin/aria2c"
-          rm -rf "$GITHUB_WORKSPACE/dist/linux/aria2c_build" "$GITHUB_WORKSPACE/aria2-1.37.0" "$GITHUB_WORKSPACE/aria2-1.37.0.tar.gz"
-
-
-      - name: Show cache status and bin contents
-        run: |
-          echo "Cache hit: ${{ steps.aria2-cache.outputs.cache-hit }}"
-          echo "Listing dist/linux/bin:" 
-          ls -la dist/linux/bin || true
-
-      - name: Cleanup FFmpeg temp
-        run: rm -rf "$GITHUB_WORKSPACE/dist/linux/ffmpeg_temp" "$GITHUB_WORKSPACE/dist/linux/ffmpeg.tar.xz"
-
-      - name: Archive Linux package
-        run: |
-          set -e
-          VERSION="${{ steps.version.outputs.version }}"
-          cd "$GITHUB_WORKSPACE/dist/linux"
-          TAR_NAME="yt-playlist-linux-${VERSION}.tar.gz"
-          tar -czf "$GITHUB_WORKSPACE/$TAR_NAME" *
-
-      - name: Upload Linux artifact
-        uses: actions/upload-artifact@v6
-        with:
-          name: linux-release
-          path: ${{ github.workspace }}/yt-playlist-linux-${{ steps.version.outputs.version }}.tar.gz
-
-  build-docker-image:
-    runs-on: ubuntu-latest
-    needs: [build-linux-package]
-    steps:
-      - uses: actions/checkout@v5
-
-      - name: Get version from tag
-        id: version
-        shell: bash
-        run: |
-          VERSION="${{ inputs.tag }}"
-          VERSION="${VERSION#v}"
-          echo "version=$VERSION" >> $GITHUB_OUTPUT
-
-      - name: Set docker image names
-        run: |
-          echo "RELEASE_IMAGE=ghcr.io/${GITHUB_ACTOR}/ytpld:${{ steps.version.outputs.version }}" >> $GITHUB_ENV
-          echo "LATEST_IMAGE=ghcr.io/${GITHUB_ACTOR}/ytpld:latest" >> $GITHUB_ENV
-
-      - name: Download linux artifact
-        uses: actions/download-artifact@v5
-        with:
-          name: linux-release
-
-      - name: Prepare Docker build context
-        run: |
-          mkdir -p dist/linux-docker
-          cp Dockerfile dist/linux-docker/
-          echo "Copying and extracting Linux artifact..."
-          tar -xzf yt-playlist-linux-${{ steps.version.outputs.version }}.tar.gz -C dist/linux-docker/
-          echo "Build context contents:"
-          ls -R dist/linux-docker
-
-      - name: Build Docker image (release)
-        run: docker build dist/linux-docker -t $RELEASE_IMAGE
-
-      - name: Save Docker image as tar (release)
-        run: docker save -o docker-image.tar $RELEASE_IMAGE
-
-      - name: Upload docker-image artifact
-        uses: actions/upload-artifact@v6
-        with:
-          name: docker-image
-          path: docker-image.tar
-
-      - name: Build Docker image (latest)
-        run: docker build dist/linux-docker --label build_as_latest=true -t $LATEST_IMAGE
-
-      - name: Save Docker image as tar (latest)
-        run: docker save -o docker-image-latest.tar $LATEST_IMAGE
-
-      - name: Upload docker-image-latest artifact
-        uses: actions/upload-artifact@v6
-        with:
-          name: docker-image-latest
-          path: docker-image-latest.tar
-
-  release:
-    runs-on: ubuntu-latest
-    needs: [build-windows-package, build-linux-package, build-docker-image]
-    steps:
-      - uses: actions/download-artifact@v5
-        with:
-          name: windows-release
-          path: windows-release
-      - uses: actions/download-artifact@v5
-        with:
-          name: linux-release
-          path: linux-release
-      - uses: actions/download-artifact@v5
-        with:
-          name: docker-image
-          path: docker-image
-      - uses: actions/download-artifact@v5
-        with:
-          name: docker-image-latest
-          path: docker-image-latest
-
-      - name: Get version from tag
-        id: version
-        shell: bash
-        run: |
-          VERSION="${{ inputs.tag }}"
-          VERSION="${VERSION#v}"
-          echo "version=$VERSION" >> $GITHUB_OUTPUT
-      - name: Set docker image names
-        run: |
-          echo "RELEASE_IMAGE=ghcr.io/${GITHUB_ACTOR}/ytpld:${{ steps.version.outputs.version }}" >> $GITHUB_ENV
-          echo "LATEST_IMAGE=ghcr.io/${GITHUB_ACTOR}/ytpld:latest" >> $GITHUB_ENV
-      - name: Login to GitHub Container Registry
-        uses: docker/login-action@v3
-        with:
-          registry: ghcr.io
-          username: ${{ github.actor }}
-          password: ${{ secrets.GITHUB_TOKEN }}
-      - name: Load and push Docker release image
-        run: |
-          docker load -i docker-image/docker-image.tar
-          docker push $RELEASE_IMAGE
-      - name: Load and push Docker latest image
-        run: |
-          docker load -i docker-image-latest/docker-image-latest.tar
-          docker push $LATEST_IMAGE
-
-      - name: Create GitHub Release
-        id: create_release
-        uses: actions/create-release@v1
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-        with:
-          tag_name: ${{ steps.version.outputs.version }}
-          release_name: "Release ${{ steps.version.outputs.version }}"
-          draft: true
-      - name: Upload Windows release asset
-        uses: actions/upload-release-asset@v1
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-        with:
-          upload_url: ${{ steps.create_release.outputs.upload_url }}
-          asset_path: windows-release/yt-playlist-windows-${{ steps.version.outputs.version }}.zip
-          asset_name: yt-playlist-windows-${{ steps.version.outputs.version }}.zip
-          asset_content_type: application/zip
-      - name: Upload Linux release asset
-        uses: actions/upload-release-asset@v1
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-        with:
-          upload_url: ${{ steps.create_release.outputs.upload_url }}
-          asset_path: linux-release/yt-playlist-linux-${{ steps.version.outputs.version }}.tar.gz
-          asset_name: yt-playlist-linux-${{ steps.version.outputs.version }}.tar.gz
-          asset_content_type: application/gzip

.github/workflows/build_v2.yml

@@ -1,258 +0,0 @@
-name: Build Release V2
-
-on:
-  workflow_dispatch:
-    inputs:
-      tag:
-        description: "Release tag (e.g., v0.1.0)"
-        required: true
-        default: "v0.1.0"
-        type: string
-
-permissions:
-  contents: write
-  packages: write
-
-jobs:
-  test:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v5
-      - name: Set up Python
-        uses: actions/setup-python@v5
-        with:
-          python-version: '3.11'
-      - name: Install dependencies
-        run: |
-          python -m pip install --upgrade pip
-          pip install pytest
-      - name: Run tests
-        env:
-          PYTHONPATH: ${{ github.workspace }}
-        run: pytest
-
-  build:
-    needs: test
-    runs-on: ${{ matrix.os }}
-    strategy:
-      fail-fast: false
-      matrix:
-        include:
-          - platform: windows
-            os: windows-latest
-            artifact_name: windows-release
-          - platform: linux
-            os: ubuntu-latest
-            artifact_name: linux-release
-
-    steps:
-      - uses: actions/checkout@v5
-
-      - name: Get version
-        id: version
-        shell: bash
-        run: |
-          TAG="${{ github.event.inputs.tag || inputs.tag }}"
-          VERSION="${TAG#v}"
-          echo "version=$VERSION" >> $GITHUB_OUTPUT
-
-      # --- WINDOWS BUILD ---
-      - name: Build Windows Package
-        if: matrix.platform == 'windows'
-        shell: pwsh
-        run: |
-          $VERSION = "${{ steps.version.outputs.version }}"
-          $WORKSPACE = "${{ github.workspace }}"
-          New-Item -ItemType Directory -Force -Path "$WORKSPACE/dist/windows/bin"
-          Copy-Item "$WORKSPACE/yt-playlist-main.py" "$WORKSPACE/dist/windows/"
-          
-          # yt-dlp
-          Invoke-WebRequest -Uri "https://github.com/yt-dlp/yt-dlp/releases/latest/download/yt-dlp.exe" -OutFile "$WORKSPACE/dist/windows/bin/yt-dlp.exe"
-          
-          # FFmpeg
-          Invoke-WebRequest -Uri "https://www.gyan.dev/ffmpeg/builds/ffmpeg-release-essentials.zip" -OutFile "$WORKSPACE/dist/windows/ffmpeg.zip"
-          Expand-Archive "$WORKSPACE/dist/windows/ffmpeg.zip" -DestinationPath "$WORKSPACE/dist/windows/ffmpeg_temp"
-          $ffmpegExe = Get-ChildItem -Path "$WORKSPACE/dist/windows/ffmpeg_temp" -Filter "ffmpeg.exe" -Recurse | Select-Object -First 1
-          Move-Item $ffmpegExe.FullName "$WORKSPACE/dist/windows/bin/ffmpeg.exe"
-          
-          # aria2c (Windows Portable)
-          Invoke-WebRequest -Uri "https://github.com/aria2/aria2/releases/download/release-1.37.0/aria2-1.37.0-win-64bit-build1.zip" -OutFile "$WORKSPACE/dist/windows/aria2c.zip"
-          Expand-Archive "$WORKSPACE/dist/windows/aria2c.zip" -DestinationPath "$WORKSPACE/dist/windows/aria2_temp"
-          Move-Item "$WORKSPACE/dist/windows/aria2_temp/aria2-1.37.0-win-64bit-build1/aria2c.exe" "$WORKSPACE/dist/windows/bin/aria2c.exe"
-          
-          # Build .exe using PyInstaller
-          pip install pyinstaller
-          pyinstaller --onefile --name "yt-playlist-downloader" --workpath "$WORKSPACE/build" --specpath "$WORKSPACE" --distpath "$WORKSPACE/dist" --add-data "$WORKSPACE/src;ytpld" "$WORKSPACE/yt-playlist-main.py"
-          Move-Item "$WORKSPACE/dist/yt-playlist-downloader.exe" "$WORKSPACE/dist/windows/yt-playlist-downloader.exe"
-
-          # Cleanup & Archive
-          Remove-Item -Recurse -Force "$WORKSPACE/dist/windows/ffmpeg_temp", "$WORKSPACE/dist/windows/aria2_temp", "$WORKSPACE/dist/windows/*.zip"
-          Compress-Archive -Path "$WORKSPACE/dist/windows/*" -DestinationPath "$WORKSPACE/yt-playlist-windows-$VERSION.zip"
-
-      # --- LINUX BUILD ---
-      - name: Build Linux Package
-        if: matrix.platform == 'linux'
-        run: |
-          VERSION="${{ steps.version.outputs.version }}"
-          mkdir -p "$GITHUB_WORKSPACE/dist/linux/bin"
-          cp "$GITHUB_WORKSPACE/yt-playlist-main.py" "$GITHUB_WORKSPACE/dist/linux/"
-          
-          # yt-dlp
-          curl -L https://github.com/yt-dlp/yt-dlp/releases/latest/download/yt-dlp_linux -o "$GITHUB_WORKSPACE/dist/linux/bin/yt-dlp"
-          chmod +x "$GITHUB_WORKSPACE/dist/linux/bin/yt-dlp"
-
-          # FFmpeg (static)
-          curl -L https://johnvansickle.com/ffmpeg/releases/ffmpeg-release-amd64-static.tar.xz -o "$GITHUB_WORKSPACE/ffmpeg.tar.xz"
-          mkdir -p "$GITHUB_WORKSPACE/ffmpeg_temp"
-          tar -xf "$GITHUB_WORKSPACE/ffmpeg.tar.xz" -C "$GITHUB_WORKSPACE/ffmpeg_temp" --strip-components=1
-          mv "$GITHUB_WORKSPACE/ffmpeg_temp/ffmpeg" "$GITHUB_WORKSPACE/dist/linux/bin/"
-          chmod +x "$GITHUB_WORKSPACE/dist/linux/bin/ffmpeg"
-
-      - name: Cache aria2c binary (Linux)
-        if: matrix.platform == 'linux'
-        id: aria2-cache
-        uses: actions/cache@v4
-        with:
-          path: ${{ github.workspace }}/dist/linux/bin/aria2c
-          key: aria2c-linux-1.37.0
-
-      - name: Build aria2c (Linux)
-        if: matrix.platform == 'linux' && steps.aria2-cache.outputs.cache-hit != 'true'
-        run: |
-          set -e
-          sudo apt update && sudo apt install -y build-essential pkg-config libssl-dev zlib1g-dev wget
-          
-          mkdir -p "$GITHUB_WORKSPACE/dist/linux/bin"
-          cd "$GITHUB_WORKSPACE"
-          
-          wget https://github.com/aria2/aria2/releases/download/release-1.37.0/aria2-1.37.0.tar.gz
-          tar -xzf aria2-1.37.0.tar.gz
-          cd aria2-1.37.0
-          
-          CFLAGS="-Os -s" LDFLAGS="-static" ./configure \
-            --enable-static --disable-shared \
-            --disable-libaria2 --without-ca-bundle \
-            --without-libnettle --without-libgcrypt \
-            --without-libssh2 --without-libexpat \
-            --without-libxml2 --without-libsqlite3 \
-            --with-openssl
-            
-          make -j"$(nproc)"
-          strip src/aria2c
-          cp src/aria2c "$GITHUB_WORKSPACE/dist/linux/bin/aria2c"
-          chmod +x "$GITHUB_WORKSPACE/dist/linux/bin/aria2c"
-          
-          cd "$GITHUB_WORKSPACE"
-          rm -rf aria2-1.37.0 aria2-1.37.0.tar.gz
-
-      - name: Archive Linux Package
-        if: matrix.platform == 'linux'
-        run: |
-          VERSION="${{ steps.version.outputs.version }}"
-          # Archive
-          cd "$GITHUB_WORKSPACE/dist/linux" && tar -czf "$GITHUB_WORKSPACE/yt-playlist-linux-$VERSION.tar.gz" *
-
-      - name: Upload Artifact
-        uses: actions/upload-artifact@v6
-        with:
-          name: ${{ matrix.artifact_name }}
-          path: |
-            ${{ github.workspace }}/*.zip
-            ${{ github.workspace }}/*.tar.gz
-
-  docker:
-    needs: build
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v5
-      
-      - name: Get version
-        id: version
-        shell: bash
-        run: |
-          TAG="${{ github.event.inputs.tag || inputs.tag }}"
-          VERSION="${TAG#v}"
-          echo "version=$VERSION" >> $GITHUB_OUTPUT
-
-      - name: Download Linux Artifact
-        uses: actions/download-artifact@v5
-        with:
-          name: linux-release
-          path: ${{ github.workspace }}/dist/linux-docker
-
-      - name: Prepare Docker build context
-        run: |
-          cd "$GITHUB_WORKSPACE/dist/linux-docker"
-          tar -xzf "$GITHUB_WORKSPACE/dist/linux-docker/yt-playlist-linux-${{ steps.version.outputs.version }}.tar.gz"
-          cp "$GITHUB_WORKSPACE/Dockerfile" .
-          cp "$GITHUB_WORKSPACE/docker-entrypoint.sh" .
-          
-          if [ ! -d "src" ]; then cp -r "$GITHUB_WORKSPACE/src" . ; fi
-          # Ensure config directory is present
-          if [ ! -d "config" ]; then cp -r "$GITHUB_WORKSPACE/config" . ; fi
-          
-          # Debug: List context to verify paths match Dockerfile expectations
-          ls -R
-
-      - name: Set docker image names
-        run: |
-          VERSION="${{ steps.version.outputs.version }}"
-          echo "RELEASE_IMAGE=ghcr.io/${GITHUB_ACTOR}/ytpld:${VERSION}" >> $GITHUB_ENV
-          echo "LATEST_IMAGE=ghcr.io/${GITHUB_ACTOR}/ytpld:latest" >> $GITHUB_ENV
-
-      - name: Build Docker image
-        run: |
-          docker build . -t $RELEASE_IMAGE -t $LATEST_IMAGE
-        working-directory: ${{ github.workspace }}/dist/linux-docker
-
-      - name: Save Docker images
-        run: |
-          docker save -o docker-image.tar $RELEASE_IMAGE
-          docker save -o docker-image-latest.tar $LATEST_IMAGE
-        working-directory: ${{ github.workspace }}/dist/linux-docker
-
-      - name: Upload Docker artifacts
-        uses: actions/upload-artifact@v6
-        with:
-          name: docker-images
-          path: ${{ github.workspace }}/dist/linux-docker/docker-image*.tar
-
-  release:
-    needs: [build, docker]
-    runs-on: ubuntu-latest
-    if: startsWith(github.event.inputs.tag, 'v')
-    steps:
-      - name: Download all artifacts
-        uses: actions/download-artifact@v5
-        with:
-          path: ${{ github.workspace }}/artifacts
-
-      - name: Get version
-        id: version
-        shell: bash
-        run: |
-          TAG="${{ github.event.inputs.tag || inputs.tag }}"
-          VERSION="${TAG#v}"
-          echo "version=$VERSION" >> $GITHUB_OUTPUT
-
-      - name: Login to GitHub Container Registry
-        uses: docker/login-action@v3
-        with:
-          registry: ghcr.io
-          username: ${{ github.actor }}
-          password: ${{ secrets.GITHUB_TOKEN }}
-
-      - name: Push Docker images
-        run: |
-          docker load -i "${{ github.workspace }}/artifacts/docker-images/docker-image.tar"
-          docker push ghcr.io/${GITHUB_ACTOR}/ytpld:${{ steps.version.outputs.version }}
-          docker load -i "${{ github.workspace }}/artifacts/docker-images/docker-image-latest.tar"
-          docker push ghcr.io/${GITHUB_ACTOR}/ytpld:latest
-
-      - name: Create Release
-        uses: softprops/action-gh-release@v2
-        with:
-          tag_name: ${{ github.event.inputs.tag }}
-          files: |
-            ${{ github.workspace }}/artifacts/**/*.zip
-            ${{ github.workspace }}/artifacts/**/*.tar.gz

.github/workflows/integration.yml

@@ -2,10 +2,7 @@ name: Integration tests (minimal)
 
 on:
   workflow_dispatch:
-  #push:
-    #branches: [ main, Next ]
-  #pull_request:
-    #branches: [ main, Next ]
+
 
 jobs:
   integration:
@@ -13,34 +10,28 @@ jobs:
     runs-on: ubuntu-latest
     env:
       INTEGRATION_TEST: '1'
+      # Used by the integration tests to locate ffmpeg reliably.
+      FFMPEG_PATH: '/usr/bin/ffmpeg'
       TEST_PLAYLIST_URL: 'https://www.youtube.com/playlist?list=PLUmRr21IDW9WCW87FnbWAbIwwZHbf-lAz'
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
-      - name: Make bundled linux binaries executable (if present)
+      - name: Set up Python
+        uses: actions/setup-python@v6
+        with:
+          python-version: '3.11'
+          cache: 'pip'
+
+      - name: Install ffmpeg
         run: |
           set -euo pipefail
-          if [ -d ./bin/linux ]; then
-            chmod +x ./bin/linux/* || true
-            ls -l ./bin/linux || true
-          fi
+          sudo apt-get update
+          sudo apt-get install -y ffmpeg
 
-      - name: Create venv and install project
+      - name: Run integration tests
         run: |
           set -euo pipefail
-          python3 -m venv .venv
-          . .venv/bin/activate
-          python -m pip install --upgrade pip
-          # Install project in editable mode. If the 'test' extra exists, prefer it.
-          python -m pip install -e .[test] || python -m pip install -e .
-          python -m pip install pytest
-
-      - name: Run integration script directly
-        env:
-          YTPL_DEBUG: '1'
-        run: |
-          set -euo pipefail
-          . .venv/bin/activate
-          python tests/integration_full_workflow_test.py
+          python -m pip install -e ".[test]"
+          pytest -m integration

.github/workflows/lint_ruff.yml

@@ -2,17 +2,27 @@ name: Lint Python code
 
 on:
   push:
+    branches:
+      - main
+    paths-ignore:
+      - "assets/**"
+      - "README.md"
   pull_request:
+    branches:
+      - main
+    paths-ignore:
+      - "assets/**"
+      - "README.md"
 
 jobs:
   lint:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Install Ruff
         run: pip install ruff
 
       - name: Run linter
-        run: ruff check .
+        run: ruff check .

.github/workflows/unit-tests.yml

@@ -3,33 +3,47 @@ name: Unit tests
 on:
   workflow_dispatch:
   push:
-    branches: [ main, Next ]
+    branches: 
+      - main
+    paths-ignore:
+      - "assets/**"
+      - "README.md"
   pull_request:
-    branches: [ main, Next ]
+    branches:
+      - main
+    paths-ignore:
+      - "assets/**"
+      - "README.md"
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
 
 jobs:
   tests:
     name: Run unit tests
     runs-on: ubuntu-latest
+    permissions:
+      contents: read
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
-      - name: Create venv and install project
+      - name: Set up Python
+        uses: actions/setup-python@v6
+        with:
+          python-version: '3.11'
+          cache: 'pip'
+
+      - name: Install project
         run: |
           set -euo pipefail
-          python3 -m venv .venv
-          . .venv/bin/activate
           python -m pip install --upgrade pip
           # Install project (editable) and test deps
-          python -m pip install -e .[test] || python -m pip install -e .
-          python -m pip install pytest
+          python -m pip install -e ".[test]"
 
       - name: Run tests
-        env:
-          PYTHONPATH: ${{ github.workspace }}
         run: |
           set -euo pipefail
-          . .venv/bin/activate
           pytest -q

.github/workflows/update-yt-dlp.yml

@@ -0,0 +1,95 @@
+name: update yt-dlp
+on:
+  schedule:
+    - cron: "0 10 * * *"
+  workflow_dispatch:
+
+permissions:
+  contents: write
+  pull-requests: write
+
+concurrency:
+  group: refresh-yt-dlp-pr
+  cancel-in-progress: true
+
+jobs:
+  refresh:
+    name: Update yt-dlp dependency
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v6
+        with:
+          fetch-depth: 0
+
+      - name: Set up Python
+        uses: actions/setup-python@v6
+        with:
+          python-version: "3.12"
+
+      - name: Check and bump yt-dlp
+        id: detect
+        shell: bash
+        run: |
+          set -euo pipefail
+
+          python - <<'PY' >> "$GITHUB_OUTPUT"
+          from __future__ import annotations
+
+          import json
+          import re
+          from pathlib import Path
+          from urllib.request import urlopen
+
+          def version_tuple(text: str) -> tuple[int, ...]:
+              parts = re.findall(r"\d+", text)
+              return tuple(int(p) for p in parts)
+
+          pyproject = Path("pyproject.toml")
+          text = pyproject.read_text(encoding="utf-8")
+
+          dep_match = re.search(r'^\s*"yt-dlp>=(?P<version>[^"]+)"\s*,?\s*$', text, re.MULTILINE)
+          if not dep_match:
+              raise SystemExit("Could not find yt-dlp dependency in pyproject.toml")
+
+          dep_version = dep_match.group("version")
+
+          latest_payload = urlopen("https://pypi.org/pypi/yt-dlp/json", timeout=30)
+          latest_version = json.load(latest_payload)["info"]["version"]
+
+          needs_update = version_tuple(latest_version) > version_tuple(dep_version)
+
+          print(f"needs_update={'true' if needs_update else 'false'}")
+          print(f"latest_yt_dlp={latest_version}")
+          print(f"current_yt_dlp={dep_version}")
+
+          if needs_update:
+              text = re.sub(
+                  r'(^\s*"yt-dlp>=)[^"]+(")',
+                  rf'\g<1>{latest_version}\2',
+                  text,
+                  flags=re.MULTILINE,
+              )
+              pyproject.write_text(text, encoding="utf-8")
+          PY
+
+      - name: Create or update pull request
+        if: steps.detect.outputs.needs_update == 'true'
+        uses: peter-evans/create-pull-request@v8
+        with:
+          # Use a non-GITHUB_TOKEN credential so the resulting PR triggers CI workflows.
+          # Configure secrets.PR_WORKFLOW_TOKEN with contents:write and pull-requests:write.
+          token: ${{ secrets.PR_WORKFLOW_TOKEN || github.token }}
+          branch: chore/refresh-yt-dlp
+          commit-message: "chore: bump yt-dlp to ${{ steps.detect.outputs.latest_yt_dlp }}"
+          title: "chore: bump yt-dlp to ${{ steps.detect.outputs.latest_yt_dlp }}"
+          body: |
+            Automated yt-dlp dependency refresh.
+
+            - Current version: `${{ steps.detect.outputs.current_yt_dlp }}`
+            - Latest version: `${{ steps.detect.outputs.latest_yt_dlp }}`
+          labels: deps
+          delete-branch: false
+          add-paths: |
+            pyproject.toml

.gitignore

@@ -7,6 +7,8 @@ config/yt-playlist-config.json
 /*/tmp*
 *.code-workspace
 /bin/*
+/db/*
+plans
 
 # Byte-compiled / optimized / DLL files
 __pycache__/

.vscode/settings.json

@@ -1,4 +1,5 @@
 {
+    "python.terminal.activateEnvironment": true,
     "python.testing.pytestArgs": [
         "tests"
     ],

Dockerfile

@@ -1,23 +0,0 @@
-FROM python:3.12-alpine
-
-WORKDIR /app
-
-# Copy application code (package) and bootstrap
-COPY yt-playlist-main.py /app/
-COPY src/ /app/ytpld/
-COPY config/ /app/config/
-
-# Copy helper binaries from the build context (which includes extracted artifacts)
-COPY bin/ffmpeg /app/bin/ffmpeg
-COPY bin/yt-dlp /app/bin/yt-dlp
-COPY bin/aria2c /app/bin/aria2c
-
-# Copy entrypoint that maps environment variables to CLI flags
-COPY docker-entrypoint.sh /app/docker-entrypoint.sh
-RUN chmod +x /app/docker-entrypoint.sh && chmod +x /app/bin/* || true
-
-# Put the bundled bin directory first in PATH
-ENV PATH="/app/bin:${PATH}"
-
-ENTRYPOINT ["/app/docker-entrypoint.sh"]
-CMD [""]

GUI plan.md

@@ -1,26 +0,0 @@
-### Python-first
-
-- Primary GUI framework: `PySide6` (Qt for Python) — native desktop look, cross-platform on Windows and Linux, mature widget set, good documentation.
-- Desktop architecture: keep the core downloader logic as a Python package and expose a local HTTP/WebSocket API (e.g., `FastAPI`) that the GUI talks to. The GUI stays a thin client that issues commands and receives status updates.
-
-### Why this approach
-
-- Stay in Python end-to-end for now, minimizing new languages or runtimes.
-- A local API boundary lets you reuse the same backend for a future Web frontend (React/Next.js or plain SPA) and for Android (native or Flutter shell that talks to the API or a hosted API).
-- `PySide6` provides a polished native desktop UX and easier packaging for Windows/Linux compared with Python mobile toolkits.
-
-### Packaging & Distribution (brief)
-
-- Bundle the backend and GUI into one distributable. The GUI should spawn the local API process (background subprocess) on startup.
-- Windows: use `pyinstaller` or `briefcase` to create an executable/installer. Consider creating an MSI or Inno Setup installer for a polished UX.
-- Linux: provide AppImage, Snap, or distribution-specific packages (deb/rpm) — AppImage is a good starting point for single-file distribution.
-- Security: bind the local API to `localhost` only, use a short-lived token or IPC for authentication between GUI and backend, and avoid exposing unnecessary ports.
-
-### Roadmap (GUI → Web → Mobile)
-
-1. Desktop prototype: `FastAPI` backend + `PySide6` GUI (thin client) with basic playlist add/update/download controls and status streaming.
-2. Packaging: create Windows exe/installer and Linux AppImage for the prototype.
-3. Web frontend: build a web SPA that consumes the same backend API (hosted or local) — this reuses business logic with minimal change.
-4. Android: either a native app or cross-platform UI (Flutter/React Native) that calls the backend API; alternatively host the backend and make a thin mobile client.
-
-If you want, I can now: scaffold a minimal `FastAPI` backend and `PySide6` desktop starter in this repo, or produce concise packaging steps for Windows and Linux. Which do you prefer? 

LICENSE

@@ -1,232 +0,0 @@
-GNU GENERAL PUBLIC LICENSE
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-     YouTube-Playlist-Downloader
-     Copyright (C) 2025  dark_zoul
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-     YouTube-Playlist-Downloader  Copyright (C) 2025  dark_zoul
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README.md

@@ -1,218 +1,94 @@
-# YouTube Playlist Downloader
+# YouTube Playlist Sync
 
-[![Build Release](https://github.com/darkzoul5/YoutubePlaylistDownloader/actions/workflows/build.yml/badge.svg?branch=main)](https://github.com/darkzoul5/YoutubePlaylistDownloader/actions/workflows/build.yml)
-[![Unit tests](https://github.com/darkzoul5/YoutubePlaylistDownloader/actions/workflows/unit-tests.yml/badge.svg?branch=main)](https://github.com/darkzoul5/YoutubePlaylistDownloader/actions/workflows/unit-tests.yml)
+![Release](https://img.shields.io/github/v/release/darkzoul5/YoutubePlaylistSync?style=flat-square&label=Release)
+![Build-Release](https://img.shields.io/github/actions/workflow/status/darkzoul5/YoutubePlaylistSync/build-release.yml?style=flat-square&label=Build-Release)
+![Unit Tests](https://img.shields.io/github/actions/workflow/status/darkzoul5/YoutubePlaylistSync/unit-tests.yml?style=flat-square&label=unit-tests)
 
-A cross-platform tool for downloading entire YouTube playlists as MP3 or MP4 files, using [yt-dlp](https://github.com/yt-dlp/yt-dlp), [ffmpeg](https://ffmpeg.org/), and [aria2c](https://github.com/aria2/aria2). Includes Gitea CI/CD workflow for packaging and releasing Windows and Linux binaries.
+A cross-platform tool for downloading and keeping in sync a local copy of entire YouTube playlists as MP3 or MP4 files, using [yt-dlp](https://github.com/yt-dlp/yt-dlp) & [ffmpeg](https://ffmpeg.org/).
 
 Supports audio, video, or both download modes, music and videos are numbered as they are on your youtube playlist, playlist cleanup, and configurable parallel download options.
+Local-first YouTube playlist synchronization client.
 
----
+## What's Included
 
-## Features
-
-- **Download full YouTube playlists** as high-quality MP3 (audio), MP4 (video), or both.
-- **Download mode:** Choose `audio`, `video`, or `both` for each playlist.
-- **Max video quality:** Select from `720p`, `1080p`, `1440p`, `2160p`, or `best`.
-- **Parallel downloads:** Using aria2 for speed.
-- **Automatic renumbering:** Tracks are renumbered to match playlist order after download.
-- **Cleanup of tracks:** Option to remove files not in playlist anymore, with confirmation.
-- **Configurable output paths** and archive tracking.
-- **Cross-platform:** Windows and Linux support.
-- **GitHub Actions CI/CD workflow** for automated packaging and release.
-
----
+- GUI (PySide6 Essentials) playlist manager + sync runner
+- Scanner (yt-dlp extract-only), diff engine, filesystem scan
+- Safe reordering via two-pass rename, recycle deletions
+- Async download queue with simple retry (yt-dlp Python API)
+- SQLite metadata (`last_sync`, download state)
 
 ## Requirements
 
-- Python 3.8+
+- If you download a `-ffmpeg` release: no extra dependencies
+- If you download a non-ffmpeg release: install `ffmpeg` and ensure it's on PATH (needed for `audio` and `both` modes)
 
----
+## Download
 
-## Installation
+Download the latest release from this repo's Releases page and pick one:
 
-### Quick Start
+- `ytpl-sync-windows-{version}-ffmpeg.zip` / `ytpl-sync-linux-{version}-ffmpeg.tar.gz` (ffmpeg bundled)
+- `ytpl-sync-windows-{version}.zip` / `ytpl-sync-linux-{version}.tar.gz` (no ffmpeg bundled)
 
-1. **Download the latest release:**
+## Configure
 
-- Go to the [Releases](https://github.com/darkzoul5/YoutubePlaylistDownloader/releases) page.
-  - Download the appropriate archive for your platform (Windows or Linux).
-
-1. **Unzip the archive:**
-
-- Extract the contents to a folder of your choice.
-
-1. **Edit configuration:**
-
-- Open `yt-playlist-config.json` and adjust paths, playlist URLs, download mode, and quality as needed.
-
-1. **Run the downloader:**
-
-- On Windows:
-
-    ```sh
-    python yt-playlist-main.py
-    ```
-
-- On Linux:
-
-    ```sh
-    python3 yt-playlist-main.py
-    ```
-
----
-
-## Usage
-
-### Configuration
-
-Edit `yt-playlist-config.json` to specify playlists, paths, and options:
+Application uses a json config that canbe edited from UI or manually
 
 ```json
 {
+  "ffmpeg_path": "./bin/ffmpeg.exe",
+  "max_parallel_downloads": 2,
+  "retry_max_retries": 2,
+  "retry_delay_seconds": 1.5,
   "playlists": [
     {
-      "url": "https://www.youtube.com/playlist?list=playlistidhere",
-      "download_mode": "audio",         
-      "max_video_quality": "1080p",
-      "save_path": "./music",
-      "archive": "archive.txt",
+      "url": "https://www.youtube.com/playlist?list=YOUR_PLAYLIST_ID",
+      "download_mode": "video",
+      "max_download_quality": "1080p",
+      "save_path": "./downloads",
+      "name": "my favorite playlist"
     }
-  ],
-  "yt_dlp_path": "./bin/yt-dlp.exe",      // or "yt-dlp" for Linux
-  "ffmpeg_path": "./bin/ffmpeg.exe",      // or "ffmpeg" for Linux
-  "aria2c_path": "./bin/aria2c.exe",      // or "aria2c" for Linux
-  "max_parallel_downloads": 10,
-  "aria2c_connections": 8
+  ]
 }
 ```
 
-- **playlists:** List of playlist objects. Each must have a `url`, `save_path`, and `archive`.
-- **yt_dlp_path, ffmpeg_path, aria2c_path:** Paths to binaries (relative or absolute).
-- **download_mode:** Choose `audio`, `video`, or `both`.
-- **max_video_quality:** Set max video quality for downloads.
-- **max_parallel_downloads:** Number of simultaneous downloads.
-- **aria2c_connections:** Connections per download.
+`max_download_quality`:
 
----
+- Limits yt-dlp download quality (e.g. `"2160p"`, `"1440p"`, `"1080p"`, `"720p"`, `"360p"`). This only affects the downloaded video format selection.
+- Use `"best"` for no height cap (highest available).
+- If the requested max quality isn't available for a video, the best available quality is chosen.
 
-### Running
+`download_mode`:
 
-- Just run the script with Python:
-  - On Windows: `python yt-playlist-main.py`
-  - On Linux: `python3 yt-playlist-main.py`
+- `video`: download playlist videos as `.mp4` (no ffmpeg required)
+- `audio`: download video, extract `.mp3`, delete the video file
+- `both`: download video, extract `.mp3`, keep both files
 
-- The downloader will:
-  - Check for required tools and update yt-dlp automatically
-  - Download new tracks or videos from your playlist(s)
-  - Number and name files to match the playlist order
-  - Skip deleted or private videos
-  - Avoid re-downloading files you've already downloaded
-  - Offer to clean up files that are no longer in the playlist
+Queue / retry:
 
----
+- `max_parallel_downloads`: number of concurrent download workers.
+- `retry_max_retries`: how many times a failed download job is retried.
+- `retry_delay_seconds`: base delay before retry; increases with backoff.
 
-## CLI flags
+## Run
 
-When running the script locally (for example `python yt-playlist-main.py`), you can pass the following flags:
+- Run `ytpl-sync.exe` (GUI).
 
-- `-c, --config <path>` — Path to a configuration file (relative to the repository `config/` directory by default)
-- `-d, --debug` — Show verbose subprocess output (yt-dlp, ffmpeg, aria2c)
-- `-p, --prune` — Run with pruning (deleting files not present in playlists)
-- `-y, --yes, --non-interactive` — Auto-confirm prompts (used only with `--prune`at the moment)
+## Tray
 
-Examples (local):
+- The app supports minimizing to tray on close if the OS provides a system tray; use the tray icon menu to quit.
+- Tray behavior settings (Settings page):
+  - `close_to_tray`: close hides to tray (keeps running).
+  - `minimize_to_tray`: minimize hides to tray.
+  - `start_minimized_to_tray`: start hidden in tray.
 
-```powershell
-# Run with debug output
-python yt-playlist-main.py --debug
+## Data & Layout
 
-# Run non-interactive and prune
-python yt-playlist-main.py --prune --yes
+- Database: `db/app.db`
+- Outputs: `<save_path>/audio` and/or `<save_path>/video`
+- Recycle bin: `<save_path>/.recycle/{audio,video}`
 
-# Use a different config file
-python yt-playlist-main.py --config custom-config.json
-```
+## Roadmap (short)
 
----
-
-## Docker Usage
-
-You can run YouTube Playlist Downloader using the official Docker image.
-
-### Run the container
-
-```pwsh
-docker run -v /path/to/downloads:/app/downloads -v /path/to/config:/app/config ghcr.io/dark_zoul/ytpld:latest
-```
-
-Replace `/path/to/downloads` and `/path/to/config` with your local directories.
-
-**Required volumes:**
-
-- `/app/downloads`: Directory for downloaded audio/videos
-- `/app/config`: Directory for the configuration file
-
-### Docker Compose example
-
-Create a `docker-compose.yml` with the following content (replace the host paths as needed):
-
-```yaml
-services:
-  yt-downloader:
-    image: ghcr.io/dark_zoul/ytpld:latest
-    container_name: yt-downloader
-    restart: no
-    volumes:
-      - /path/to/downloads:/app/downloads
-      - /path/to/config:/app/config
-```
-
-Run it with:
-
-```pwsh
-docker compose up -d
-```
-
-## Docker Compose — environment variables
-
-You can pass environment variables.
-
-Environment variables
-
-- `YTPL_DEBUG` (0/1): When set to `1` shows verbose output from external binaries (yt-dlp, ffmpeg, aria2c). Useful for diagnosing failures.
-- `YTPL_PRUNE` (0/1): When set to `1` enables pruning — files that are not present in any configured playlist will be deleted (requires confirmation unless `YTPL_YES` is set).
-- `YTPL_YES` (0/1): Auto-confirm prompts (use with `YTPL_PRUNE` in automated runs).
-- `YTPL_CONFIG`: Path to a config file inside the container (defaults to `/app/config/yt-playlist-config.json` if present).
-- `YTPL_CONFIG_JSON`: Full JSON payload for the entire config. When provided it overwrites `/app/config/yt-playlist-config.json`.
-- `YTPL_PLAYLISTS_JSON`: JSON array used to populate the `playlists` field in the config.
-- `PLAYLIST_{N}_{FIELD}`: Indexed playlist entries. For each playlist index N use `PLAYLIST_N_URL`, `PLAYLIST_N_DOWNLOAD_MODE`, `PLAYLIST_N_SAVE_PATH`, `PLAYLIST_N_ARCHIVE`, etc.
-- `YTPL_MAX_PARALLEL_DOWNLOADS`: Integer, maximum concurrent downloads.
-- `YTPL_ARIA2C_CONNECTIONS`: Integer, connections per download.
-- `YTPL_MAX_VIDEO_QUALITY`: String, e.g., `1080p`, `720p`, `best`.
-- `YTPL_DOWNLOAD_MODE`: `audio`, `video`, or `both` — default download mode applied to playlists that don't set it individually.
-
-Tip
-
-- Mount a config file for complex setups to avoid long environment variables. Example: `- /host/config/yt-playlist-config.json:/app/config/yt-playlist-config.json`.
-
-## Troubleshooting
-
-- **No binaries found:** Ensure paths in `yt-playlist-config.json` are correct and binaries are present.
-- **No tracks downloaded:** Check playlist URL and archive file.
-- **Download mode or quality issues:** Make sure `download_mode` and `max_video_quality` are set to valid values.
-- **Network overload warning:** If you set very high parallel/connections, the script will warn you.
-
----
-
-## License
-
-See [LICENSE](LICENSE).
-
----
-
-## Credits
-
-- [yt-dlp](https://github.com/yt-dlp/yt-dlp)
-- [ffmpeg](https://ffmpeg.org/)
-- [aria2c](https://github.com/aria2/aria2)
+- Scheduler (periodic sync), richer retries/logging
+- Enhanced config validation
+- UX polish (settings, progress, error messages)

compose.yaml

@@ -1,9 +0,0 @@
-version: '3.8'
-services:
-  ytpld:
-    image: git.darkzoul.org/dark_zoul/ytpld:latest
-    container_name: ytpld
-    restart: no
-    volumes:
-      - /path/to/downloads:/app/downloads
-      - /path/to/config:/app/config

config/yt-playlist-config.example.json

@@ -1,16 +1,22 @@
 {
+  "ffmpeg_path": "./bin/ffmpeg.exe",
+  "max_parallel_downloads": 2,
+  "retry_max_retries": 2,
+  "retry_delay_seconds": 1.5,
+  "ui": {
+    "tray": {
+      "close_to_tray": false,
+      "minimize_to_tray": false,
+      "start_minimized_to_tray": false
+    }
+  },
   "playlists": [
     {
       "url": "https://www.youtube.com/playlist?list=YOUR_PLAYLIST_ID_HERE",
-      "download_mode": "audio",
-      "max_video_quality": "1080p",
+      "download_mode": "video",
+      "max_download_quality": "1080p",
       "save_path": "./downloads",
-      "archive": "archive.txt"
+      "name": "my favorite playlist"
     }
-  ],
-  "yt_dlp_path": "./bin/yt-dlp",
-  "ffmpeg_path": "./bin/ffmpeg",
-  "aria2c_path": "./bin/aria2c",
-  "max_parallel_downloads": 6,
-  "aria2c_connections": 4
+  ]
 }

docker-entrypoint.sh

@@ -1,147 +0,0 @@
-#!/bin/sh
-# Entry point for the ytplaylist container.
-# Converts environment variables into CLI flags and execs the Python CLI.
-
-set -e
-
-# Map environment variables to CLI flags
-ARGS=""
-
-if [ "${YTPL_DEBUG:-0}" != "0" ]; then
-  ARGS="$ARGS --debug"
-fi
-
-if [ "${YTPL_PRUNE:-0}" != "0" ]; then
-  ARGS="$ARGS --prune"
-fi
-
-if [ "${YTPL_YES:-0}" != "0" ]; then
-  ARGS="$ARGS --yes"
-fi
-
-if [ -n "${YTPL_CONFIG}" ]; then
-  ARGS="$ARGS --config ${YTPL_CONFIG}"
-fi
-
-# If environment-based configuration is provided, materialize it into /app/config/yt-playlist-config.json
-# Supported methods (priority order):
-# 1) YTPL_CONFIG_JSON -> full JSON payload for the entire config
-# 2) YTPL_PLAYLISTS_JSON -> JSON array assigned to 'playlists' key in the base config
-# 3) PLAYLIST_{N}_{FIELD} env vars, e.g. PLAYLIST_0_URL, PLAYLIST_0_DOWNLOAD_MODE, etc.
-# Top-level overrides (optional): YTPL_MAX_PARALLEL_DOWNLOADS, YTPL_ARIA2C_CONNECTIONS, YTPL_MAX_VIDEO_QUALITY, YTPL_DOWNLOAD_MODE
-
-if [ -n "${YTPL_CONFIG_JSON:-}" ] || [ -n "${YTPL_PLAYLISTS_JSON:-}" ] || env | grep -q '^PLAYLIST_' ; then
-  python - <<'PY'
-import os, json, sys
-from pathlib import Path
-
-config_dir = Path('/app/config')
-config_dir.mkdir(parents=True, exist_ok=True)
-config_path = config_dir / 'yt-playlist-config.json'
-
-# Load existing config if present, otherwise start with a minimal default
-base = {
-  'playlists': [
-    {
-      'url': 'https://www.youtube.com/playlist?list=YOUR_PLAYLIST_ID_HERE',
-      'download_mode': 'audio',
-      'max_video_quality': '1080p',
-      'save_path': './downloads',
-      'archive': 'archive.txt'
-    }
-  ],
-  'yt_dlp_path': 'yt-dlp',
-  'ffmpeg_path': 'ffmpeg',
-  'aria2c_path': 'aria2c',
-  'max_parallel_downloads': 10,
-  'aria2c_connections': 8,
-}
-
-if config_path.exists():
-  try:
-    with config_path.open('r', encoding='utf-8') as f:
-      base = json.load(f)
-  except Exception:
-    # if existing file is invalid, continue with our base and overwrite below
-    pass
-
-# 1) Full config JSON
-cfg_json = os.environ.get('YTPL_CONFIG_JSON')
-if cfg_json:
-  try:
-    cfg = json.loads(cfg_json)
-    with config_path.open('w', encoding='utf-8') as f:
-      json.dump(cfg, f, indent=2)
-  except Exception as e:
-    print('ERROR: failed to parse YTPL_CONFIG_JSON:', e, file=sys.stderr)
-    sys.exit(1)
-  sys.exit(0)
-
-# 2) Playlists JSON
-pl_json = os.environ.get('YTPL_PLAYLISTS_JSON')
-if pl_json:
-  try:
-    playlists = json.loads(pl_json)
-    if isinstance(playlists, list):
-      base['playlists'] = playlists
-    else:
-      raise ValueError('YTPL_PLAYLISTS_JSON must be a JSON array')
-  except Exception as e:
-    print('ERROR: failed to parse YTPL_PLAYLISTS_JSON:', e, file=sys.stderr)
-    sys.exit(1)
-
-# 3) Indexed PLAYLIST_{N}_{FIELD} variables
-playlists = {}
-for k, v in os.environ.items():
-  if not k.startswith('PLAYLIST_'):
-    continue
-  parts = k.split('_', 2)
-  if len(parts) < 3:
-    continue
-  _, idx, field = parts
-  try:
-    i = int(idx)
-  except Exception:
-    continue
-  playlists.setdefault(i, {})[field.lower()] = v
-
-if playlists:
-  # convert to ordered list
-  built = [playlists[i] for i in sorted(playlists.keys())]
-  base['playlists'] = built
-
-# Top-level overrides
-overrides = {
-  'max_parallel_downloads': 'YTPL_MAX_PARALLEL_DOWNLOADS',
-  'aria2c_connections': 'YTPL_ARIA2C_CONNECTIONS',
-  'max_video_quality': 'YTPL_MAX_VIDEO_QUALITY',
-  'download_mode': 'YTPL_DOWNLOAD_MODE',
-}
-for key, envname in overrides.items():
-  if envname in os.environ and os.environ[envname] != '':
-    val = os.environ[envname]
-    # cast numbers where appropriate
-    if key in ('max_parallel_downloads', 'aria2c_connections'):
-      try:
-        val = int(val)
-      except Exception:
-        pass
-    base[key] = val
-
-# Write resulting config
-try:
-  with config_path.open('w', encoding='utf-8') as f:
-    json.dump(base, f, indent=2)
-except Exception as e:
-  print('ERROR: failed to write config file:', e, file=sys.stderr)
-  sys.exit(1)
-
-PY
-fi
-
-# Allow the user to pass extra args to the container
-if [ "$#" -gt 0 ]; then
-  exec python -m ytplaylist.cli $ARGS "$@"
-else
-  exec python -m ytplaylist.cli $ARGS
-fi

plans/GUI plan.md

@@ -0,0 +1,24 @@
+# GUI Plan
+
+## Python-first Desktop Architecture
+
+- **Primary GUI framework**: `PySide6` (Qt for Python).
+
+## Core Features to Implement
+
+1. **Dashboard Overview**: List all tracked playlists, their status (Last Sync), and total size.
+2. **Interactive Configuration**: Wizard-style setup for new playlists (URL detection, folder picker).
+3. **Queue Manager**: Visual progress bars for active downloads, showing speed, ETA, and current video title.
+4. **Log Viewer**: Real-time streaming of yt-dlp logs for troubleshooting.
+5. **Settings Panel**: Global settings for binary paths (ffmpeg), max parallel jobs, and Docker detection toggle.
+
+## Phase 1 Roadmap: "The Bridge"
+
+- [ ] **PySide6 Skeleton**: Basic window with `QWebEngine` (if hybrid) or native `QWidget` dashboard.
+- [ ] **Packaging**: `pyinstaller` configuration to bundle both backend and frontend into a single `.exe`.
+
+## Packaging & Distribution (brief)
+
+- Bundle the backend and GUI into one distributable.
+- Windows: use `pyinstaller` or `briefcase` to create an executable/installer. Consider creating an MSI or Inno Setup installer for a polished UX.
+- Linux: provide AppImage, Snap, or distribution-specific packages (deb/rpm) — AppImage is a good starting point for single-file distribution.

plans/mp3 metadata plan.md

@@ -0,0 +1,161 @@
+# MP3 Metadata Plan
+
+## Subject Area
+
+- Add MP3 tag writing for downloaded YouTube playlist items.
+- Scope is limited to `.mp3` outputs produced by `audio` mode and the MP3 side of `both` mode.
+- Metadata is sourced from YouTube/yt-dlp and embedded after audio extraction.
+
+## Goal
+
+- Write useful MP3 metadata for downloaded playlist items without affecting video-only downloads.
+- Keep the implementation reliable when optional fields are missing.
+- Preserve successful downloads even when metadata embedding partially fails.
+- Provide a per-playlist setting to enable or disable MP3 metadata embedding.
+
+## Required Metadata
+
+- `title` ← video title
+- `artist` ← uploader, fallback to channel
+- `album` ← album name if present
+- `tracknumber` ← playlist index
+- `date` / `year` ← upload date
+- `comment` ← source URL
+- `genre` ← if available
+- `album_art` ← thumbnail
+
+## Configuration Requirement
+
+- Add a per-playlist setting to turn MP3 metadata embedding on or off.
+- Default should be explicitly defined during implementation; recommended default is `enabled` for new configs.
+- The setting should only affect `.mp3` metadata writing and should not change download selection, extraction, or `.mp4` handling.
+
+## Current Constraints
+
+- The current playlist scan keeps only a minimal item shape: title, video id, and playlist index.
+- The scanner uses flat extraction, which is sufficient for diffing but not for full tag data.
+- MP3 extraction currently transcodes audio but does not write ID3 metadata.
+
+## Implementation Strategy
+
+- Keep playlist diffing fast by retaining the current flat scan for remote playlist structure.
+- Fetch full metadata only for items that are actually going to be downloaded or repaired.
+- Write metadata only after MP3 extraction completes successfully.
+- Treat metadata embedding as a post-processing step that can fail softly without discarding the MP3.
+
+## Work Breakdown
+
+### 1. Extend the metadata model
+
+- Add optional fields to `PlaylistItem` for:
+  - uploader
+  - channel
+  - album
+  - upload_date
+  - genre
+  - thumbnail_url
+  - webpage_url
+- Keep `artist` as a derived value instead of storing a separate field.
+
+### 2. Fetch full per-video metadata
+
+- Introduce a metadata fetch step for each item selected for download.
+- Use yt-dlp per-video extraction to retrieve richer fields than the flat playlist entry provides.
+- Prefer canonical values from the video page payload for upload date, uploader/channel, album, genre, thumbnail, and source URL.
+
+### 3. Carry metadata through the download pipeline
+
+- Ensure the enriched `PlaylistItem` reaches the download job and post-processing stage.
+- Keep this propagation in-memory unless restart-safe metadata persistence becomes necessary later.
+- Avoid changing unrelated sync behavior for video-only items.
+- Carry the per-playlist MP3 metadata enabled/disabled setting into the post-processing step.
+
+### 4. Add an MP3 tag writer
+
+- Add `mutagen` as the ID3 writing dependency.
+- Implement a focused tagging component that maps `PlaylistItem` metadata into ID3 frames.
+- Omit fields when the source value is missing instead of writing placeholders.
+
+### 5. Map fields into ID3 tags
+
+- `title` → video title
+- `artist` → uploader, fallback to channel
+- `album` → album if present
+- `tracknumber` → playlist index
+- `date/year` → parsed upload date
+- `comment` → canonical source URL
+- `genre` → genre if present
+
+### 6. Embed album art
+
+- Download the selected thumbnail for the video after the media download succeeds.
+- Attach thumbnail data as embedded cover art when the image type is supported.
+- Fail soft if thumbnail retrieval or embedding fails, and keep the MP3 intact.
+
+### 7. Integrate into modes
+
+- `audio` mode:
+  - download source media
+  - extract MP3
+  - write MP3 tags only when the setting is enabled
+  - delete temporary/source MP4 if configured
+- `both` mode:
+  - download source media
+  - extract MP3
+  - write MP3 tags only when the setting is enabled
+  - keep MP4 unchanged
+- `video` mode:
+  - no MP3 tagging path
+
+### 8. Add configuration surface
+
+- Add the new per-playlist setting to the playlist config model and default config output.
+- Expose the setting in the playlist configuration UI, not as a global app setting.
+- Keep the naming explicit, for example `write_mp3_metadata` or `embed_mp3_metadata`.
+
+## Error Handling Rules
+
+- If download fails, no tagging runs.
+- If extraction fails, no tagging runs.
+- If metadata embedding is disabled, skip the tagging step entirely.
+- If tagging fails, mark the tag step as failed in logs/events but keep the MP3 file.
+- If thumbnail embedding fails, continue with text metadata only.
+- Missing `album` or `genre` is normal and should not be treated as an error.
+
+## Testing Plan
+
+- Unit test metadata mapping from yt-dlp info to the internal metadata model.
+- Unit test ID3 writing against a temporary MP3 fixture.
+- Unit test fallback behavior:
+  - uploader missing, channel present
+  - album missing
+  - genre missing
+  - thumbnail missing
+- Integration test the audio post-processing path with tagging mocked.
+- Integration test the both-mode MP3 path with tagging mocked.
+
+## Documentation Updates
+
+- Document that MP3 tags are written only for `.mp3` outputs.
+- Document the new per-playlist setting that enables or disables MP3 metadata embedding.
+- Document the field fallback rules, especially artist and album behavior.
+- Document that album art comes from the video thumbnail, not playlist artwork.
+- Document that some YouTube items will not expose album or genre information.
+
+## Dependency Decision
+
+- Recommended library: `mutagen`
+- Reason:
+  - direct ID3 support
+  - reliable field-level control
+  - suitable for embedding cover art
+  - avoids depending on ffmpeg metadata flags for all tag logic
+
+## Delivery Order
+
+- First: add config setting and defaults
+- Second: extend metadata model and add full metadata fetch
+- Third: add MP3 tag writer and field mapping
+- Fourth: add thumbnail embedding
+- Fifth: wire tagging into `audio` and `both`
+- Sixth: add tests and docs

plans/project plan.md

@@ -0,0 +1,47 @@
+# Project Plan
+
+## Subject Area
+
+- Tool for downloading and synchronizing local YouTube playlists.
+- Focuses on batch downloading, format selection (audio and/or video), configurable quality and keeping local copies synced with playlist changes.
+- Targets power users and archivists who need large-scale, repeatable playlist archiving and ongoing synchronization, with GUI interface.
+
+## Problem
+
+- Users and power-users who manage large or frequently changing YouTube playlists lack a dependable, configurable tool that:
+  - correctly detects and downloads new videos while avoiding duplicates,
+  - and can be configured easily via file or GUI for repeatable workflows.
+
+## Users Definition
+
+Individuals who need to have a local youtube playlist synced with a large number of videos or audio files
+
+## Functionality Definition
+
+- Multi-format Download:
+  - Video only (mp4)
+  - Audio only (mp3)
+  - Both video and audio (mp3 & mp4)
+- Smart Synchronization:
+  - Archive tracking (prevents re-downloading existing media)
+  - Playlist Pruning (automatically deletes local files no longer in the YouTube playlist)
+  - Sequential Renumbering (keeps local files sorted by playlist position)
+- Advanced Configuration:
+  - Per-playlist settings (Quality, paths, archive file)
+  - Global performance options (Parallel downloads, aria2c threading)
+  - Path management for yt-dlp, ffmpeg, and aria2c (Docker-aware)
+- GUI Integration:
+  - Real-time status updates via backend API
+  - Visual configuration editor
+  - Modern, responsive Qt-based interface
+
+## Platforms
+
+- Desktop: Windows (Primary), Linux
+
+## Architecture & Languages
+
+- Core Engine: Python (yt-dlp)
+- Desktop Frontend: PySide6 (Qt for Python)
+- Distribution: PyInstaller / Briefcase (Windows .exe, Linux AppImage)
+  

plans/project schedule.md

@@ -0,0 +1,26 @@
+# Project Schedule
+
+| No. | Task description | Estimated time |
+| --- | --- | --- |
+| 1 | Define the project requirements, target users, and core features for playlist downloading and synchronization. | 3 hours |
+| 2 | Design the overall architecture for the Python package, CLI entry point, and configuration structure. | 4 hours |
+| 3 | Implement configuration loading and validation for paths, download modes, quality settings, and external tools. | 5 hours |
+| 4 | Build the playlist fetching logic to read playlist entries and detect new, deleted, or private videos. | 5 hours |
+| 5 | Implement the downloader core for audio, video, and combined download modes using yt-dlp, ffmpeg, and aria2c. | 8 hours |
+| 6 | Add filename sanitization, track renumbering, and output path management to keep downloaded files organized. | 5 hours |
+| 7 | Implement playlist update and cleanup logic so the local library stays synchronized with the online playlist. | 5 hours |
+| 8 | Create CLI flags for debug mode, pruning, auto-confirmation, and custom config file selection. | 4 hours |
+| 9 | Add logging, warnings, and error handling for missing binaries, network issues, and invalid settings. | 4 hours |
+| 10 | Prepare Docker support and environment-variable based configuration for containerized usage. | 4 hours |
+| 11 | Review the implementation, fix bugs, and refine behavior based on test results and runtime issues. | 6 hours |
+| 12 | Choose the GUI framework and define the desktop architecture, create a local backend API. | 4 hours |
+| 13 | Build the initial desktop GUI prototype with controls & basic actions. | 6 hours |
+| 14 | Connect the GUI to backend functionality for adding playlists, starting downloads, and showing progress updates. | 6 hours |
+| 15 | Add GUI settings for download mode, quality, save paths, and external tool configuration. | 5 hours |
+| 16 | Prepare GUI packaging and distribution for Windows and Linux. | 5 hours |
+| 17 | Write automated tests for config loading, downloader behavior, playlist updates, and cleanup edge cases. | 7 hours |
+| 18 | Write user documentation, usage examples, and release instructions for Windows and Linux. | 3 hours |
+
+## Total Time
+
+89 hours

plans/python_youtube_playlist_sync_conversion_plan.md

@@ -0,0 +1,778 @@
+# YouTube Playlist Sync — Project Conversion Plan
+
+
+---
+
+# Project Direction
+
+Convert the project from:
+
+```text
+Single-purpose YouTube playlist downloader
+```
+
+into:
+
+```text
+Persistent YouTube playlist synchronization client
+```
+
+The application becomes state-driven.
+
+---
+
+# Core Product Goals
+
+## Main Features
+
+- Sync playlists locally
+- Download missing items
+- Remove deleted playlist items
+- Keep exact playlist ordering
+- Support audio/video modes
+- Multiple playlists
+- Background auto-sync
+- GUI configuration
+- Queue management
+- Logs/history
+
+---
+
+# Explicit Non-Goals (Current Scope)
+
+Not planned right now:
+
+- Built-in media playback
+- Advanced naming templates
+- Drag-and-drop manual ordering
+- Private playlist sync
+- Channel subscriptions
+- Metadata editing
+
+Design the architecture so these can be added later.
+
+---
+
+# Recommended Stack
+
+## Core Language
+
+- Python 3.12+
+
+Reason:
+
+- Native yt-dlp ecosystem
+- Easier async/background work
+- Better packaging than many expect
+- Simpler iteration speed
+
+---
+
+# GUI
+
+## Recommended
+
+- PySide6
+
+Why:
+
+- Modern Qt ecosystem
+- Better long-term support
+- Cleaner than Tkinter
+- Easier dynamic playlist UI
+- Good threading support
+- Better styling
+
+Avoid:
+
+- Tkinter for this scale
+- Electron/Tauri unless you want a web stack
+
+---
+
+# Downloader Backend
+
+## Recommended
+
+- yt-dlp Python API
+
+Install:
+
+```bash
+pip install yt-dlp
+```
+
+Do NOT:
+
+- scrape YouTube manually
+- parse HTML yourself
+- depend on external unofficial APIs
+
+Use yt-dlp for:
+
+- metadata extraction
+- playlist scanning
+- downloading
+- postprocessing
+
+Use your own app for:
+
+- sync logic
+- ordering
+- deletion
+- scheduling
+- state tracking
+
+---
+
+# Media Processing
+
+## Recommended
+
+- ffmpeg
+
+Needed for:
+
+- audio extraction
+- remuxing
+- conversions
+- thumbnail embedding later
+
+Recommended approach:
+
+- auto-detect ffmpeg
+- optionally bundle with packaged app
+
+---
+
+# Database
+
+## Recommended
+
+- SQLite
+
+Reason:
+
+- Zero setup
+- Local-first architecture
+- Perfect for sync metadata
+- Easy migrations
+- Reliable
+
+SQLite is extremely important for this project.
+
+Do NOT rely only on:
+
+- filenames
+- folders
+- JSON
+
+---
+
+# Background Scheduling
+
+## Recommended
+
+- APScheduler
+
+Use for:
+
+- interval syncs
+- delayed jobs
+- retry jobs
+- startup sync
+
+---
+
+# Async/Concurrency
+
+## Recommended
+
+- asyncio
+
+Use for:
+
+- concurrent playlist syncs
+- GUI-safe task execution
+- download queue
+- cancellation
+- progress updates
+
+---
+
+# Logging
+
+## Recommended
+
+- loguru
+
+or:
+
+- standard logging module
+
+Need:
+
+- rotating logs
+- GUI log panel
+- error history
+- debug support
+
+---
+
+# Packaging
+
+## Recommended
+
+### During development
+
+```text
+venv + pip
+```
+
+### Release builds
+
+Choose one:
+
+| Tool        | Notes                           |
+| ----------- | ------------------------------- |
+| Nuitka      | Best performance and protection |
+| PyInstaller | Easier and common               |
+
+Nuitka is probably best long-term.
+
+---
+
+# Major Architectural Changes
+
+---
+
+# 1. Move to State-Based Sync Architecture
+
+Current downloader logic is likely:
+
+```text
+Playlist URL
+↓
+Download everything
+```
+
+Replace with:
+
+```text
+Remote Playlist State
+↓
+Stored Local State
+↓
+Filesystem State
+↓
+Diff Engine
+↓
+Sync Actions
+```
+
+This is the single most important change.
+
+---
+
+# 2. Introduce Playlist Metadata Database
+
+Create persistent tracking.
+
+Suggested tables:
+
+## playlists
+
+```sql
+CREATE TABLE playlists (
+    id TEXT PRIMARY KEY,
+    name TEXT,
+    url TEXT,
+    path TEXT,
+    mode TEXT,
+    auto_sync INTEGER,
+    sync_interval_minutes INTEGER,
+    last_sync TEXT
+);
+```
+
+## playlist\_items
+
+```sql
+CREATE TABLE playlist_items (
+    playlist_id TEXT,
+    video_id TEXT,
+    title TEXT,
+    playlist_index INTEGER,
+    local_filename TEXT,
+    downloaded INTEGER,
+    last_seen TEXT,
+    PRIMARY KEY (playlist_id, video_id)
+);
+```
+
+---
+
+# 3. Implement Playlist Scanner Layer
+
+Create dedicated metadata extraction.
+
+Suggested structure:
+
+```text
+core/
+ ├── scanner/
+ │    └── playlist_scanner.py
+```
+
+Responsibilities:
+
+- fetch playlist entries
+- extract video IDs
+- detect unavailable videos
+- return normalized playlist state
+
+Use:
+
+```python
+extract_info(download=False)
+```
+
+This allows playlist scanning without downloading.
+
+---
+
+# 4. Create Diff Engine
+
+The app should compare:
+
+```text
+Remote playlist
+vs
+Database state
+vs
+Filesystem state
+```
+
+Output actions:
+
+```text
+DOWNLOAD
+DELETE
+RENAME
+REORDER
+SKIP
+REPAIR
+```
+
+Suggested file:
+
+```text
+core/sync/diff_engine.py
+```
+
+This becomes the heart of the application.
+
+---
+
+# 5. Add Download Queue System
+
+Multi-playlist sync requires a queue.
+
+Suggested states:
+
+```text
+Queued
+Downloading
+Converting
+Completed
+Failed
+Skipped
+Cancelled
+```
+
+Suggested structure:
+
+```text
+core/download/
+ ├── queue_manager.py
+ ├── downloader.py
+ └── workers.py
+```
+
+---
+
+# 6. Implement Stable File Naming
+
+Recommended naming:
+
+```text
+0001 - Title.ext
+```
+
+Benefits:
+
+- native filesystem sorting
+- easy reorder support
+- easy repairs
+- user friendly
+
+Use:
+
+```python
+%(playlist_index)04d - %(title)s.%(ext)s
+```
+
+through yt-dlp.
+
+---
+
+# 7. Implement Safe Reordering
+
+Playlist ordering changes frequently.
+
+Never rename directly.
+
+Use:
+
+```text
+Temporary rename pass
+↓
+Final rename pass
+```
+
+Example:
+
+```text
+0001.mp3 → temp_a
+0002.mp3 → temp_b
+↓
+temp_a → 0002.mp3
+```
+
+Avoid collisions.
+
+---
+
+# 8. Implement Deletion Strategy
+
+Recommended:
+
+Instead of immediate delete:
+
+```text
+playlist/.recycle/
+```
+
+Move removed files there.
+
+Benefits:
+
+- safer
+- recoverable
+- easier debugging
+
+Optional:
+
+- auto-clean after X days
+
+---
+
+# 9. Redesign GUI Around Playlists
+
+Current downloader GUIs are usually task-oriented.
+
+You should move to:
+
+```text
+Playlist-oriented UI
+```
+
+Recommended sections:
+
+```text
+Sidebar
+ ├── Playlists
+ ├── Queue
+ ├── History
+ ├── Logs
+ └── Settings
+```
+
+---
+
+# 10. Support Infinite Playlist Entries
+
+Use dynamic UI generation.
+
+Example:
+
+```python
+class PlaylistConfig:
+    url: str
+    path: str
+    mode: str
+    auto_sync: bool
+```
+
+GUI should render from:
+
+```python
+list[PlaylistConfig]
+```
+
+Do NOT hardcode playlist pages.
+
+---
+
+# 11. Add Background Sync
+
+Start simple.
+
+## Phase 1
+
+- Timer-based sync
+- Tray icon
+- Run minimized
+
+## Phase 2
+
+- Background daemon/service
+- Headless mode
+- Autostart support
+
+---
+
+# 12. Add Progress/Event System
+
+Needed for GUI responsiveness.
+
+Recommended:
+
+```text
+event_bus.py
+```
+
+Events:
+
+```text
+DownloadStarted
+DownloadProgress
+SyncStarted
+SyncFinished
+FileDeleted
+PlaylistUpdated
+```
+
+This decouples GUI from backend.
+
+---
+
+# 13. Introduce Config Management
+
+Recommended:
+
+```text
+config.json
+```
+
+Only for:
+
+- app settings
+- UI preferences
+- non-relational settings
+
+Do NOT store sync state in JSON.
+
+---
+
+# Suggested Folder Structure
+
+```text
+app/
+ ├── core/
+ │    ├── scanner/
+ │    ├── sync/
+ │    ├── download/
+ │    ├── database/
+ │    ├── scheduler/
+ │    └── events/
+ │
+ ├── gui/
+ │    ├── pages/
+ │    ├── widgets/
+ │    ├── dialogs/
+ │    └── models/
+ │
+ ├── config/
+ ├── logs/
+ ├── data/
+ └── main.py
+```
+
+---
+
+# Suggested Sync Flow
+
+```text
+Load playlists
+↓
+Scheduler triggers sync
+↓
+Scanner fetches remote playlist
+↓
+Database state loaded
+↓
+Filesystem scanned
+↓
+Diff engine computes actions
+↓
+Queue downloads
+↓
+Reorder files
+↓
+Move removed files
+↓
+Update database
+↓
+Emit GUI events
+```
+
+---
+
+# Recommended MVP Conversion Order
+
+## Phase 1 — Backend Foundation
+
+Implement:
+
+- SQLite
+- playlist scanner
+- diff engine
+- download wrapper
+- basic sync logic
+
+No GUI redesign yet.
+
+---
+
+# Phase 2 — Stable Syncing
+
+Implement:
+
+- deletion handling
+- reorder handling
+- queue system
+- retry system
+- logs
+
+---
+
+# Phase 3 — GUI Rewrite
+
+Implement:
+
+- playlist manager UI
+- queue page
+- logs page
+- settings page
+- dynamic playlists
+
+---
+
+# Phase 4 — Automation
+
+Implement:
+
+- background sync
+- tray mode
+- startup sync
+- periodic sync
+
+---
+
+# Important Recommendations
+
+## Recommendation 1
+
+Treat:
+
+```text
+video_id
+```
+
+as the canonical identity.
+
+Never titles.
+
+---
+
+# Recommendation 2
+
+Do NOT rely on yt-dlp archive files alone.
+
+Your own DB should be the source of truth.
+
+---
+
+# Recommendation 3
+
+Keep download logic isolated.
+
+yt-dlp should be replaceable internally.
+
+---
+
+# Recommendation 4
+
+Do not overcomplicate the GUI early.
+
+Focus on sync correctness first.
+
+Sync reliability matters more than appearance.
+
+---
+
+# Recommendation 5
+
+Design everything around interruption recovery.
+
+The app should survive:
+
+- crashes
+- partial downloads
+- force closes
+- network failures
+- playlist changes mid-sync
+
+---
+
+# Recommendation 6
+
+Keep the application local-first.
+
+No account system. No cloud backend. No telemetry.
+
+That becomes a strong project identity.
+
+---
+
+# Final Recommended Identity
+
+Instead of:
+
+```text
+YouTube Downloader GUI
+```
+
+Position the project as:
+
+```text
+Local-first YouTube playlist synchronization client.
+```
+
+That identity is:
+
+- clearer
+- more unique
+- technically stronger
+- easier to expand later

plans/sync refactor maybe.md

@@ -0,0 +1,121 @@
+You need to separate playlist sync state from download attempts.
+
+The goal should not be “all 400 downloaded in one run”. It should be:
+
+All downloadable items eventually reach a final state. Temporary failures are retried later. Permanent failures are recorded clearly.
+
+Use statuses like:
+
+queued
+downloading
+completed
+
+temporary_failed
+rate_limited
+verification_required
+
+unavailable
+private
+geo_blocked
+copyright_blocked
+age_restricted
+unsupported
+failed_permanent
+
+skipped_by_user
+removed_from_playlist
+
+Main logic:
+
+1. Fetch playlist metadata
+2. Create/update queue items for all playlist videos
+3. Download available queued items
+4. On normal temporary errors: retry later
+5. On YouTube rate-limit / bot check: pause the whole sync
+6. On unavailable/private/deleted videos: mark as permanent failure
+7. On next sync: retry only retryable items
+
+Important: do not delete queue records just because download failed. Keep them as sync records.
+
+For each video, store:
+
+video_id
+playlist_id
+playlist_position
+wanted_format: audio | video
+status
+failure_type
+failure_message
+attempt_count
+last_attempt_at
+next_retry_at
+is_retryable
+local_file_path
+
+Retry behavior:
+
+temporary_failed -> retry with backoff
+rate_limited -> pause playlist/app queue, retry much later
+verification_required -> pause until user action
+unavailable/private/deleted -> do not retry often
+geo/age restricted -> do not retry unless settings/auth changed
+
+Example backoff:
+
+attempt 1: retry after 10 minutes
+attempt 2: retry after 1 hour
+attempt 3: retry after 6 hours
+attempt 4: retry after 24 hours
+attempt 5+: retry manually or during next scheduled sync
+
+For the user, show a sync summary:
+
+Playlist sync partially completed
+
+Downloaded: 200
+Queued: 0
+Retry later: 80
+Needs attention: 1
+Unavailable: 119
+
+The playlist is still tracked. Retryable items will be attempted again in the next sync.
+
+Best behavior for the 400-item example:
+
+200 downloaded
+50 unavailable/private/deleted -> mark permanent
+149 temporary/rate-limited -> retry later
+1 bot/verification error -> pause sync and ask user
+
+Do not cancel the whole sync as “failed”. Mark it as:
+
+completed_with_issues
+paused_needs_attention
+partially_synced
+
+In UI terms, the playlist should have a health/status:
+
+Synced
+Syncing
+Partially synced
+Paused - needs attention
+Error
+
+The most important rule:
+
+Never lose the reason why an item did not download.
+
+That lets your app eventually download everything possible without repeatedly hammering YouTube or confusing the user.
+
+
+## What to change to match the plan
+
+Fix the destructive UPSERT behavior in src/app/core/database/db.py / SyncService.sync_from_config() so scans update metadata (title/index/last_seen) but do not overwrite existing downloaded/local_filename (and later: status/failure fields).
+
+Introduce a persistent table (or extend playlist_items) with:
+status, failure_type, failure_message, attempt_count, last_attempt_at, next_retry_at, is_retryable, wanted_format, local_file_path.
+
+Update ActionExecutor / worker layer to write transitions into DB (queued → downloading → completed / temporary_failed / rate_limited / verification_required / failed_permanent).
+
+Change “next sync” selection to only pick queued or retryable && next_retry_at <= now, not everything each time.
+Add summary/health states (partially_synced, paused_needs_attention, etc.) based on counts.

project plan.md

@@ -1,55 +0,0 @@
-# Project Plan
-
-## Subject Area
-
-- Tool for downloading and synchronizing YouTube playlists.
-- Focuses on reliable batch downloading, format selection (audio and/or video), configurable quality and keeping local copies synced with playlist changes.
-- Targets power users and archivists who need large-scale, repeatable playlist archiving and ongoing synchronization, with GUI interfaces.
-
-## Problem
-
-- Users and power-users who manage large or frequently changing YouTube playlists lack a dependable, configurable tool that:
-  - correctly detects and downloads new videos while avoiding duplicates,
-  - and can be configured easily via file or GUI for repeatable workflows.
-
-## Users Definition
-
-Individuals who need to download a large number of videos or audio files from a YouTube playlist and keep it updated
-
-## Functionality Definition
-
-- Can download:
-  - Video only
-  - Audio only
-  - Both video and audio
-- Can update the playlist (download only newly added videos)
-- Can delete videos that are no longer in the playlist
-- Has configuration for:
-  - Quality
-  - Download type (audio, video)
-  - Save directory
-  - Use of aria2c
-  - aria2c-related settings
-  - GUI settings
-
-## GUI
-
-- Has buttons for all features
-- Allows adjusting all settings from the GUI
-- Modern Design
-
-
-## Platform
-
-- Desktop application
-- Optional:
-  - Web App
-  - Android App
-
-## Languages
-
-- Backend
-  - Python
-- Frontend
-  - qt ?
-  - Tkinter?

pyproject.toml

@@ -3,17 +3,34 @@ requires = ["setuptools>=61.0", "wheel"]
 build-backend = "setuptools.build_meta"
 
 [project]
-name = "yt-playlist-downloader"
-version = "v1.1.4"
-description = "YouTube playlist downloader"
+name = "ytpl-sync"
+version = "2.1.1"
+description = "YouTube playlist Sync"
 readme = "README.md"
 authors = [ { name = "Dark_Zoul" } ]
 license = { file = "LICENSE" }
-keywords = ["youtube", "yt-dlp", "playlist", "downloader"]
+keywords = ["youtube", "yt-dlp", "playlist", "sync"]
+requires-python = ">=3.10"
+dependencies = [
+	"yt-dlp>=2026.6.9",
+    "PySide6_Essentials>=6.11.1",
+]
+[project.optional-dependencies]
+test = [
+    "pytest",
+    "ruff",
+    "black"
+]
 
 [project.urls]
-"Home" = "https://git.darkzoul.org/dark_zoul/youtube-playlist-downloader"
+Home = "https://github.com/darkzoul5/YoutubePlaylistSync"
+
+[project.scripts]
+ytpl-sync = "app.cli:main"
+
+[tool.setuptools]
+package-dir = {"" = "src"}
 
 [tool.setuptools.packages.find]
-where = ["."]
-include = ["ytplaylist*"]
+where = ["src"]
+include = ["app*"]

pytest.ini

@@ -3,3 +3,5 @@ testpaths = tests
 # Collect all standardized tests using the conventional pattern
 python_files = test_*.py
 addopts = -q
+markers =
+    integration: real network/file download tests (opt-in)

src/__init__.py

@@ -1,4 +0,0 @@
-"""ytplaylist package exports"""
-from .cli import main
-
-__all__ = ["main"]

src/app/__init__.py

@@ -0,0 +1,10 @@
+"""
+App package: backend foundation for playlist sync (no GUI).
+
+This package is the new, state-driven backend. It is intentionally
+minimal at this stage and will be filled out iteratively.
+"""
+
+__all__ = [
+    "core",
+]

src/app/cli.py

@@ -0,0 +1,112 @@
+from __future__ import annotations
+
+import argparse
+import asyncio
+import logging
+from pathlib import Path
+
+from .config.settings import Settings
+from .core.database.db import Database
+from .core.sync.service import SyncService
+from .core.sync.executor import ActionExecutor
+from .core.events.event_bus import EventBus
+import re
+from .core.utils.yt import extract_playlist_id
+from .core.utils.deps import DependencyError
+from .core.utils.logging_setup import configure_logging
+
+
+def main(argv: list[str] | None = None) -> int:
+    parser = argparse.ArgumentParser(description="YouTube Playlist Sync — compute/apply actions")
+    parser.add_argument("--apply", action="store_true", help="Apply actions (otherwise compute-only)")
+    parser.add_argument("--db", type=Path, default=Path("db/app.db"), help="Path to SQLite database")
+    parser.add_argument("--playlist", type=int, default=None, help="Only run for a specific playlist index (0-based)")
+    parser.add_argument("--verbose", action="store_true", help="Print detailed events (rename/recycle/start)")
+    parser.add_argument("--debug", action="store_true", help="Enable debug logging to console + app/data/app.log")
+    args = parser.parse_args(argv)
+
+    configure_logging(verbose=bool(args.debug), log_file=Path("app/data/app.log"))
+    log = logging.getLogger(__name__)
+
+    settings = Settings()
+    db = Database(args.db.resolve())
+    service = SyncService(db)
+    bus = EventBus()
+    executor = ActionExecutor(db, event_bus=bus)
+
+    seen_errors: set[str] = set()
+
+    ansi = re.compile(r"\x1b\[[0-9;]*m")
+
+    async def on_started(payload):
+        if args.verbose:
+            vid = payload.get("video_id")
+            target = payload.get("target")
+            print(f"START: {vid} → {target}")
+
+    async def on_completed(payload):
+        vid = payload.get("video_id")
+        target = payload.get("target")
+        print(f"OK: {vid} → {target}")
+
+    async def on_failed(payload):
+        raw = str(payload.get("error", "failed"))
+        msg = ansi.sub("", raw)
+        # Print only once per unique message
+        if msg not in seen_errors:
+            seen_errors.add(msg)
+            # Friendly hint for missing ffmpeg
+            if "ffmpeg not found" in msg.lower():
+                print("ERROR: ffmpeg not found. Install ffmpeg or set 'ffmpeg_path' in config.")
+            else:
+                print(f"ERROR: {msg}")
+
+    # Subscribe to key events
+    bus.subscribe("DownloadStarted", on_started)
+    bus.subscribe("DownloadCompleted", on_completed)
+    bus.subscribe("DownloadFailed", on_failed)
+    if args.verbose:
+        async def on_rename(payload):
+            print(f"RENAME: {payload.get('video_id')} → {payload.get('to')}")
+        async def on_recycle(payload):
+            print(f"RECYCLE: {payload.get('video_id')} ← {payload.get('name')}")
+        bus.subscribe("RenameApplied", on_rename)
+        bus.subscribe("FileRecycled", on_recycle)
+
+    playlists = settings.playlists
+    if args.playlist is not None:
+        playlists = [playlists[args.playlist]] if 0 <= args.playlist < len(playlists) else []
+
+    for pl in playlists:
+        url = pl.get("url")
+        pid = extract_playlist_id(url) or (url or "")
+        try:
+            actions = service.sync_from_config(pl)
+        except ImportError as e:
+            msg = str(e)
+            if "yt_dlp" in msg or "yt-dlp" in msg:
+                print("yt-dlp Python package is required. Install with: pip install -U yt-dlp")
+                return 2
+            raise
+        counts: dict[str, int] = {}
+        for a in actions:
+            counts[a.type.name] = counts.get(a.type.name, 0) + 1
+        summary = ", ".join(f"{k}:{v}" for k, v in sorted(counts.items()))
+        print(f"Playlist {pid}: {len(actions)} actions → {summary}")
+        log.info("playlist=%s actions=%s summary=%s", pid, len(actions), summary)
+        if args.apply and actions:
+            try:
+                asyncio.run(executor.execute(actions, pl))
+            except DependencyError as e:
+                print(f"ERROR: {e}")
+                log.error("dependency error: %s", e)
+                return 2
+            db.set_playlist_last_sync(pid)
+            print(f"Applied actions for {pid}.")
+            log.info("playlist=%s applied_actions=%s", pid, len(actions))
+
+    return 0
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())

src/app/config/__init__.py

@@ -0,0 +1 @@
+"""Config loader for the new backend (separate from legacy)."""

src/app/config/settings.py

@@ -0,0 +1,81 @@
+from __future__ import annotations
+
+import json
+import os
+from pathlib import Path
+from typing import Any, Dict, List
+
+
+def _default_ffmpeg_path() -> str:
+    if os.name == "nt":
+        return "./bin/ffmpeg.exe"
+    return "./bin/ffmpeg"
+
+
+DEFAULT_CONFIG: Dict[str, Any] = {
+    "playlists": [],
+    "download_mode": "video",
+    "max_download_quality": "1080p",
+    "save_path": "./downloads",
+    "ffmpeg_path": _default_ffmpeg_path(),
+    "max_parallel_downloads": 2,
+    "retry_max_retries": 2,
+    "retry_delay_seconds": 1.5,
+}
+
+
+class Settings:
+    def __init__(self) -> None:
+        base_dir = Path("config")
+        base_dir.mkdir(parents=True, exist_ok=True)
+        self.path = (base_dir / "yt-playlist-config.json").resolve()
+        self.data: Dict[str, Any] = dict(DEFAULT_CONFIG)
+
+        # Ensure there is always a config file at the default path.
+        if not self.path.exists():
+            self._write_default_config(self.path)
+
+        self._load_from_path(self.path)
+
+    def _load_from_path(self, path: Path) -> None:
+        try:
+            self.data.update(json.loads(path.read_text(encoding="utf-8")))
+        except Exception:
+            # Leave defaults if invalid JSON; validation can be added later.
+            pass
+
+    def _write_default_config(self, path: Path) -> None:
+        path.parent.mkdir(parents=True, exist_ok=True)
+        default_payload: Dict[str, Any] = {
+            "playlists": [
+                {
+                    "url": "https://www.youtube.com/playlist?list=YOUR_PLAYLIST_ID",
+                    "download_mode": "video",
+                    "max_download_quality": "1080p",
+                    "save_path": "./downloads",
+                }
+            ],
+            "ffmpeg_path": _default_ffmpeg_path(),
+        }
+        path.write_text(json.dumps(default_payload, indent=2) + "\n", encoding="utf-8")
+
+    @property
+    def playlists(self) -> List[Dict[str, Any]]:
+        global_defaults = {
+            "download_mode": self.data.get("download_mode", DEFAULT_CONFIG["download_mode"]),
+            "max_download_quality": self.data.get("max_download_quality", DEFAULT_CONFIG["max_download_quality"]),
+            "save_path": self.data.get("save_path", DEFAULT_CONFIG["save_path"]),
+            "ffmpeg_path": self.data.get("ffmpeg_path", DEFAULT_CONFIG["ffmpeg_path"]),
+            "max_parallel_downloads": self.data.get("max_parallel_downloads", DEFAULT_CONFIG["max_parallel_downloads"]),
+            "retry_max_retries": self.data.get("retry_max_retries", DEFAULT_CONFIG["retry_max_retries"]),
+            "retry_delay_seconds": self.data.get("retry_delay_seconds", DEFAULT_CONFIG["retry_delay_seconds"]),
+        }
+
+        results: List[Dict[str, Any]] = []
+        for pl in list(self.data.get("playlists", [])):
+            if not isinstance(pl, dict):
+                continue
+            merged = dict(global_defaults)
+            merged.update(pl)
+            results.append(merged)
+        return results

src/app/core/__init__.py

@@ -0,0 +1,10 @@
+"""Core backend modules (scanner, sync, download, db, scheduler, events)."""
+
+__all__ = [
+    "scanner",
+    "sync",
+    "download",
+    "database",
+    "scheduler",
+    "events",
+]

src/app/core/database/__init__.py

@@ -0,0 +1 @@
+"""Database helpers (SQLite)."""

src/app/core/database/db.py

@@ -0,0 +1,124 @@
+from __future__ import annotations
+
+import sqlite3
+from pathlib import Path
+from typing import Iterable
+
+
+SCHEMA = """
+PRAGMA journal_mode=WAL;
+
+CREATE TABLE IF NOT EXISTS playlists (
+    id TEXT PRIMARY KEY,
+    name TEXT,
+    url TEXT,
+    path TEXT,
+    mode TEXT,
+    auto_sync INTEGER,
+    sync_interval_minutes INTEGER,
+    last_sync TEXT
+);
+
+CREATE TABLE IF NOT EXISTS playlist_items (
+    playlist_id TEXT,
+    video_id TEXT,
+    title TEXT,
+    playlist_index INTEGER,
+    local_filename TEXT,
+    downloaded INTEGER,
+    last_seen TEXT,
+    PRIMARY KEY (playlist_id, video_id)
+);
+"""
+
+
+class Database:
+    """Thin SQLite persistence layer for playlists and playlist items.
+
+    The database stores the local synchronization state so the sync pipeline
+    can compare remote playlist data with what has already been downloaded,
+    renamed, or marked as removed.
+    """
+
+    def __init__(self, db_path: Path) -> None:
+        self.path = db_path
+        self.path.parent.mkdir(parents=True, exist_ok=True)
+        self._conn = sqlite3.connect(self.path)
+        self._conn.row_factory = sqlite3.Row
+        self._migrate()
+
+    def _migrate(self) -> None:
+        """Create the schema if this database has not been initialized yet."""
+        with self._conn:
+            self._conn.executescript(SCHEMA)
+
+    def upsert_playlist_items(self, rows: Iterable[tuple]):
+        """Insert or refresh the cached metadata for playlist entries."""
+        sql = (
+            "INSERT INTO playlist_items (playlist_id, video_id, title, playlist_index, local_filename, downloaded, last_seen) "
+            "VALUES (?, ?, ?, ?, ?, ?, datetime('now')) "
+            "ON CONFLICT(playlist_id, video_id) DO UPDATE SET "
+            "title=excluded.title, playlist_index=excluded.playlist_index, local_filename=excluded.local_filename, "
+            "downloaded=excluded.downloaded, last_seen=datetime('now')"
+        )
+        with self._conn:
+            self._conn.executemany(sql, rows)
+
+    def get_items_index(self, playlist_id: str) -> dict[str, sqlite3.Row]:
+        """Return all cached items for a playlist keyed by video id."""
+        cur = self._conn.execute(
+            "SELECT * FROM playlist_items WHERE playlist_id = ?",
+            (playlist_id,),
+        )
+        return {row["video_id"]: row for row in cur.fetchall()}
+
+    def upsert_playlist(self, *, id: str, name: str | None, url: str, path: str, mode: str, auto_sync: int = 0, sync_interval_minutes: int = 0) -> None:
+        """Insert or update the playlist configuration row."""
+        sql = (
+            "INSERT INTO playlists (id, name, url, path, mode, auto_sync, sync_interval_minutes, last_sync) "
+            "VALUES (?, ?, ?, ?, ?, ?, ?, NULL) "
+            "ON CONFLICT(id) DO UPDATE SET name=excluded.name, url=excluded.url, path=excluded.path, mode=excluded.mode, "
+            "auto_sync=excluded.auto_sync, sync_interval_minutes=excluded.sync_interval_minutes"
+        )
+        with self._conn:
+            self._conn.execute(sql, (id, name, url, path, mode, auto_sync, sync_interval_minutes))
+
+    def update_local_filename(self, playlist_id: str, video_id: str, local_filename: str | None) -> None:
+        """Record the current filename associated with a playlist item."""
+        with self._conn:
+            self._conn.execute(
+                "UPDATE playlist_items SET local_filename = ?, last_seen = datetime('now') WHERE playlist_id = ? AND video_id = ?",
+                (local_filename, playlist_id, video_id),
+            )
+
+    def mark_downloaded(self, playlist_id: str, video_id: str, downloaded: bool) -> None:
+        """Mark whether a playlist item is present on disk."""
+        with self._conn:
+            self._conn.execute(
+                "UPDATE playlist_items SET downloaded = ?, last_seen = datetime('now') WHERE playlist_id = ? AND video_id = ?",
+                (1 if downloaded else 0, playlist_id, video_id),
+            )
+
+    def clear_file_state(self, playlist_id: str, video_id: str) -> None:
+        """Clear filename and downloaded flags after a deletion or recycle."""
+        with self._conn:
+            self._conn.execute(
+                "UPDATE playlist_items SET local_filename = NULL, downloaded = 0, last_seen = datetime('now') WHERE playlist_id = ? AND video_id = ?",
+                (playlist_id, video_id),
+            )
+
+    def set_playlist_last_sync(self, playlist_id: str) -> None:
+        """Store the timestamp of the most recent successful sync."""
+        with self._conn:
+            self._conn.execute(
+                "UPDATE playlists SET last_sync = datetime('now') WHERE id = ?",
+                (playlist_id,),
+            )
+
+    def get_playlist_last_sync(self, playlist_id: str) -> str | None:
+        """Return the last sync timestamp for a playlist, if any."""
+        cur = self._conn.execute("SELECT last_sync FROM playlists WHERE id = ?", (playlist_id,))
+        row = cur.fetchone()
+        if not row:
+            return None
+        return row["last_sync"]

src/app/core/download/downloader.py

@@ -0,0 +1,199 @@
+from __future__ import annotations
+
+from typing import Optional
+
+from .queue_manager import DownloadJob, JobState
+
+
+class Downloader:
+    """
+    Thin wrapper around yt-dlp usage. For MVP, this is a placeholder
+    where actual download logic will land (audio/video/both).
+    """
+
+    def __init__(self, yt_dlp_path: Optional[str] = None, ffmpeg_path: Optional[str] = None) -> None:
+        self.yt_dlp_path = yt_dlp_path
+        self.ffmpeg_path = ffmpeg_path
+
+    @staticmethod
+    def build_format(max_download_quality) -> str:
+        def parse_height_cap(value) -> int | None:
+            if value is None:
+                return 1080
+            if isinstance(value, int):
+                return value if value > 0 else None
+            s = str(value).strip().lower()
+            if not s:
+                return 1080
+            if s in {"best", "max", "auto"}:
+                return None
+            if s in {"none", "null"}:
+                return 1080
+            digits = "".join(ch for ch in s if ch.isdigit())
+            if not digits:
+                return None
+            try:
+                cap = int(digits)
+            except Exception:
+                return None
+            return cap if cap > 0 else None
+
+        cap = parse_height_cap(max_download_quality)
+        if cap is not None:
+            #if the requested cap isn't available, we still download the best mp4.
+            return f"best[ext=mp4][acodec!=none][vcodec!=none][height<={cap}]/best[ext=mp4][height<={cap}]/best[ext=mp4]"
+        return "best[ext=mp4][acodec!=none][vcodec!=none]/best[ext=mp4]"
+
+    async def handle_job(self, job: DownloadJob):
+        try:
+            cancel_check = getattr(job, "cancel_check", None)
+            if callable(cancel_check) and cancel_check():
+                job.state = JobState.CANCELLED
+                job.error = "cancelled"
+                return
+            job.state = JobState.DOWNLOADING
+            await self._download(job)
+            # Optional local audio extraction when requested
+            if job.mode == "video" and job.audio_output_path is not None:
+                await self._extract_audio(job)
+                # Remove the video if requested (audio-only mode)
+                if not job.keep_video and job.output_path:
+                    try:
+                        job.output_path.unlink(missing_ok=True)
+                    except Exception:
+                        pass
+            job.state = JobState.COMPLETED
+        except Exception as exc:  # pragma: no cover - environment dependent
+            job.state = JobState.FAILED
+            job.error = str(exc)
+
+    async def _download(self, job: DownloadJob):
+        # Use yt-dlp Python API, executed in a worker thread
+        import asyncio
+
+        def run():
+            import yt_dlp  # type: ignore
+            from pathlib import Path
+            try:
+                from yt_dlp.utils import DownloadCancelled  # type: ignore
+            except Exception:  # pragma: no cover - optional
+                DownloadCancelled = Exception  # type: ignore[misc,assignment]
+
+            class _QuietLogger:
+                def debug(self, msg):
+                    pass
+                def warning(self, msg):
+                    pass
+                def error(self, msg):
+                    # swallow inner repeats; errors are surfaced via exceptions
+                    pass
+                def info(self, msg):
+                    pass
+
+            outtmpl = str(job.output_path)
+
+            fmt = self.build_format(getattr(job, "max_download_quality", None))
+
+            # All modes download a single muxed mp4 when possible.
+            # This avoids any ffmpeg-driven merging during the download step, satisfying:
+            #   - video: "original file, no processing"
+            #   - audio/both: extraction is done separately after download
+            ydl_opts = {
+                "format": fmt,
+                "outtmpl": outtmpl,
+                "noplaylist": True,
+                "quiet": True,
+                "no_warnings": True,
+                "logger": _QuietLogger(),
+            }
+
+            progress_cb = getattr(job, "progress_callback", None)
+            cancel_check = getattr(job, "cancel_check", None)
+            if progress_cb is not None:
+                def hook(d):
+                    try:
+                        if callable(cancel_check) and cancel_check():
+                            raise DownloadCancelled("cancelled")
+                        import time
+                        payload = {
+                            "status": d.get("status"),
+                            "downloaded_bytes": d.get("downloaded_bytes"),
+                            "total_bytes": d.get("total_bytes") or d.get("total_bytes_estimate"),
+                            "speed": d.get("speed"),
+                            "eta": d.get("eta"),
+                            "filename": d.get("filename"),
+                        }
+                        total = payload.get("total_bytes")
+                        done = payload.get("downloaded_bytes")
+                        if total and done is not None:
+                            payload["progress"] = float(done) / float(total)
+
+                        # Throttle progress events to avoid freezing the GUI event loop.
+                        # Always forward terminal states.
+                        status = str(payload.get("status") or "")
+                        now = time.monotonic()
+                        last_ts = float(getattr(job, "_last_progress_emit_ts", 0.0) or 0.0)
+                        last_pct = float(getattr(job, "_last_progress_emit_pct", -1.0) or -1.0)
+                        pct = float(payload.get("progress")) if isinstance(payload.get("progress"), (int, float)) else None
+
+                        should_emit = status in {"finished", "error"}
+                        if not should_emit:
+                            if now - last_ts >= 0.25:
+                                should_emit = True
+                            elif pct is not None and (last_pct < 0 or abs(pct - last_pct) >= 0.01):
+                                should_emit = True
+
+                        if should_emit:
+                            setattr(job, "_last_progress_emit_ts", now)
+                            if pct is not None:
+                                setattr(job, "_last_progress_emit_pct", pct)
+                            progress_cb(payload)
+                    except Exception:
+                        pass
+
+                ydl_opts["progress_hooks"] = [hook]
+
+            # If user provided an ffmpeg path, pass it through to yt-dlp so it doesn't rely on PATH.
+            ffmpeg_hint = getattr(job, "ffmpeg_path", None) or self.ffmpeg_path
+            if ffmpeg_hint:
+                try:
+                    p = Path(str(ffmpeg_hint))
+                    if p.exists():
+                        ydl_opts["ffmpeg_location"] = str(p)
+                except Exception:
+                    pass
+
+            with yt_dlp.YoutubeDL(ydl_opts) as ydl:  # type: ignore[attr-defined]
+                ydl.download([job.url])
+
+        await asyncio.to_thread(run)
+
+    async def _extract_audio(self, job: DownloadJob):
+        import asyncio
+        from shutil import which
+
+        src = job.output_path
+        dst = job.audio_output_path
+        if not src or not dst:
+            return
+
+        def run():
+            ffmpeg_exe = job.ffmpeg_path or self.ffmpeg_path or which("ffmpeg") or "ffmpeg"
+            import subprocess
+            cmd = [
+                str(ffmpeg_exe),
+                "-y",
+                "-i",
+                str(src),
+                "-vn",
+                "-codec:a",
+                "libmp3lame",
+                "-q:a",
+                "0",
+                str(dst),
+            ]
+            subprocess.run(cmd, check=True, stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL)
+
+        # Mark converting state only for local clarity; not published
+        job.state = JobState.CONVERTING
+        await asyncio.to_thread(run)

src/app/core/download/queue_manager.py

@@ -0,0 +1,78 @@
+from __future__ import annotations
+
+import asyncio
+from dataclasses import dataclass
+from enum import Enum
+from pathlib import Path
+from typing import Any, Callable, Optional
+
+from ..models import PlaylistItem
+
+
+class JobState(str, Enum):
+    QUEUED = "Queued"
+    DOWNLOADING = "Downloading"
+    CONVERTING = "Converting"
+    COMPLETED = "Completed"
+    FAILED = "Failed"
+    SKIPPED = "Skipped"
+    CANCELLED = "Cancelled"
+
+
+@dataclass
+class DownloadJob:
+    item: PlaylistItem
+    output_path: Optional[Path] = None
+    url: Optional[str] = None
+    mode: str = "audio"  # audio|video
+    state: JobState = JobState.QUEUED
+    error: Optional[str] = None
+    ffmpeg_path: Optional[str] = None
+    max_download_quality: Optional[str] = None
+    playlist_id: Optional[str] = None
+    progress_callback: Optional[Callable[[dict[str, Any]], None]] = None
+    cancel_check: Optional[Callable[[], bool]] = None
+    audio_output_path: Optional[Path] = None  # when mode=video and we also want mp3
+    keep_video: bool = True
+
+
+class QueueManager:
+    """A small asyncio worker pool for download jobs.
+
+    Jobs are pushed into a shared queue and processed by a fixed number of
+    background tasks. This keeps the downloader concurrency bounded without
+    forcing the caller to manage worker lifetimes directly.
+    """
+
+    def __init__(self, concurrency: int = 2) -> None:
+        self._queue: "asyncio.Queue[DownloadJob]" = asyncio.Queue()
+        self._concurrency = max(1, concurrency)
+        self._workers: list[asyncio.Task[None]] = []
+        self._stopped = asyncio.Event()
+
+    async def start(self, worker_coro):
+        """Start the worker tasks that drain the queue."""
+        async def runner(idx: int):
+            while not self._stopped.is_set():
+                job = await self._queue.get()
+                try:
+                    await worker_coro(job)
+                finally:
+                    self._queue.task_done()
+
+        self._workers = [asyncio.create_task(runner(i)) for i in range(self._concurrency)]
+
+    async def stop(self):
+        """Cancel all worker tasks and mark the queue as stopped."""
+        self._stopped.set()
+        for w in self._workers:
+            w.cancel()
+        self._workers.clear()
+
+    async def enqueue(self, job: DownloadJob):
+        """Add a job to the shared queue."""
+        await self._queue.put(job)
+
+    async def join(self) -> None:
+        """Block until every queued job has been acknowledged."""
+        await self._queue.join()

src/app/core/download/workers.py

@@ -0,0 +1,37 @@
+from __future__ import annotations
+
+import asyncio
+import logging
+from .downloader import Downloader
+from .queue_manager import DownloadJob, JobState
+from ..utils.rate_limit import is_youtube_rate_limit_error
+
+
+async def default_worker(job: DownloadJob, *, max_retries: int = 2, delay_seconds: float = 1.5):
+    log = logging.getLogger(__name__)
+    dl = Downloader(ffmpeg_path=job.ffmpeg_path)
+    attempt = 0
+    while attempt <= max_retries:
+        await dl.handle_job(job)
+        if job.state == JobState.CANCELLED:
+            return
+        if job.state == JobState.COMPLETED:
+            return
+        if is_youtube_rate_limit_error(job.error):
+            # Do not retry bot-check/rate-limit style errors; caller will pause.
+            return
+        if (job.error or "").strip().lower() == "cancelled":
+            job.state = JobState.CANCELLED
+            return
+        attempt += 1
+        if attempt <= max_retries:
+            wait = delay_seconds * (2 ** (attempt - 1))
+            log.warning(
+                "retrying download attempt=%s/%s video_id=%s wait=%.1fs error=%s",
+                attempt,
+                max_retries,
+                getattr(getattr(job, "item", None), "video_id", None),
+                wait,
+                job.error,
+            )
+            await asyncio.sleep(wait)

src/app/core/events/event_bus.py

@@ -0,0 +1,21 @@
+from __future__ import annotations
+
+from collections import defaultdict
+from typing import Any, Awaitable, Callable, DefaultDict, Dict, List
+
+
+EventHandler = Callable[[Dict[str, Any]], Awaitable[None]]
+
+
+class EventBus:
+    """Simple async pub/sub event bus used by backend and (later) GUI."""
+
+    def __init__(self) -> None:
+        self._subs: DefaultDict[str, List[EventHandler]] = defaultdict(list)
+
+    def subscribe(self, event_name: str, handler: EventHandler) -> None:
+        self._subs[event_name].append(handler)
+
+    async def publish(self, event_name: str, payload: Dict[str, Any]) -> None:
+        for h in list(self._subs.get(event_name, [])):
+            await h(payload)

src/app/core/models.py

@@ -0,0 +1,56 @@
+from __future__ import annotations
+
+from dataclasses import dataclass
+from enum import Enum
+from pathlib import Path
+from typing import Optional
+
+
+class DownloadMode(str, Enum):
+    audio = "audio"
+    video = "video"
+    both = "both"
+
+
+@dataclass(frozen=True)
+class Playlist:
+    id: str
+    name: Optional[str]
+    url: str
+    path: Path
+    mode: DownloadMode = DownloadMode.audio
+    auto_sync: bool = False
+    sync_interval_minutes: int = 0
+
+
+@dataclass(frozen=True)
+class PlaylistItem:
+    playlist_id: str
+    video_id: str
+    title: str
+    playlist_index: int
+    local_filename: Optional[str] = None
+    downloaded: bool = False
+
+
+class SyncActionType(str, Enum):
+    DOWNLOAD = "DOWNLOAD"
+    DELETE = "DELETE"
+    RENAME = "RENAME"
+    REORDER = "REORDER"
+    SKIP = "SKIP"
+    REPAIR = "REPAIR"
+
+
+@dataclass(frozen=True)
+class SyncAction:
+    type: SyncActionType
+    item: Optional[PlaylistItem] = None
+    from_name: Optional[str] = None
+    to_name: Optional[str] = None
+
+
+@dataclass(frozen=True)
+class FilesystemEntry:
+    name: str
+    path: Path

src/app/core/scanner/playlist_scanner.py

@@ -0,0 +1,67 @@
+from __future__ import annotations
+
+from pathlib import Path
+from typing import List, Optional
+
+from ..models import PlaylistItem
+
+
+class PlaylistScanner:
+    """
+    Fetches remote playlist entries using yt-dlp without downloading media.
+
+    The scanner is deliberately lightweight: it extracts remote metadata only
+    and leaves persistence, diffing, and download decisions to higher layers.
+    Import-time dependency checks are avoided so the rest of the application can
+    still start in environments where yt-dlp is unavailable.
+    """
+
+    def __init__(self) -> None:
+        pass
+
+    def scan(self, playlist_url: str, playlist_id: str, *, ffmpeg_path: Optional[str] = None) -> List[PlaylistItem]:
+        """Return the current remote playlist entries as `PlaylistItem` records."""
+        try:
+            import yt_dlp  # type: ignore
+        except Exception as exc:  # pragma: no cover - environment dependent
+            raise ImportError("yt_dlp is required to scan playlists") from exc
+
+        ydl_opts = {
+            "extract_flat": True,
+            "skip_download": True,
+            "quiet": True,
+            "dump_single_json": True,
+        }
+
+        # If a local ffmpeg binary is configured, pass it through so yt-dlp doesn't rely on PATH.
+        if ffmpeg_path:
+            try:
+                p = Path(str(ffmpeg_path))
+                if p.exists():
+                    ydl_opts["ffmpeg_location"] = str(p)
+            except Exception:
+                pass
+
+        with yt_dlp.YoutubeDL(ydl_opts) as ydl:  # type: ignore[attr-defined]
+            info = ydl.extract_info(playlist_url, download=False)
+
+        entries = info.get("entries", []) if isinstance(info, dict) else []
+        items: List[PlaylistItem] = []
+        for idx, v in enumerate(entries, start=1):
+            if not v:
+                continue
+            title = v.get("title") or "[Unknown]"
+            if title in ("[Deleted video]", "[Private video]"):
+                continue
+            vid = v.get("id") or ""
+            if not vid:
+                continue
+            items.append(
+                PlaylistItem(
+                    playlist_id=playlist_id,
+                    video_id=vid,
+                    title=title,
+                    playlist_index=idx,
+                )
+            )
+        return items

src/app/core/scheduler/scheduler.py

@@ -0,0 +1,20 @@
+from __future__ import annotations
+
+from datetime import timedelta
+from typing import Awaitable, Callable
+
+
+class Scheduler:
+    """
+    Lightweight placeholder for background scheduling. This can later be
+    swapped for APScheduler without changing call sites.
+    """
+
+    def __init__(self) -> None:
+        self._jobs: list[tuple[timedelta, Callable[[], Awaitable[None]]]] = []
+
+    def every(self, interval: timedelta, coro_factory: Callable[[], Awaitable[None]]):
+        self._jobs.append((interval, coro_factory))
+        return self
+
+    # A full implementation will run an event loop and await jobs.

src/app/core/sync/diff_engine.py

@@ -0,0 +1,62 @@
+from __future__ import annotations
+
+from typing import Iterable, List, Mapping, Sequence
+
+from ..models import FilesystemEntry, PlaylistItem, SyncAction, SyncActionType
+
+
+class DiffEngine:
+    """
+    Compares remote playlist items, database state, and filesystem to
+    produce a list of actions. Initial MVP computes DOWNLOAD/RENAME/DELETE
+    based on simple filename scheme "0001 - Title.ext".
+    """
+
+    def compute_actions(
+        self,
+        remote: Sequence[PlaylistItem],
+        db_index: Mapping[str, PlaylistItem],
+        fs_entries: Iterable[FilesystemEntry],
+        extension: str,
+    ) -> List[SyncAction]:
+        actions: List[SyncAction] = []
+
+        desired_names = {
+            item.video_id: f"{item.playlist_index:04d} - {item.title}{extension}"
+            for item in remote
+        }
+
+        fs_by_name = {e.name: e for e in fs_entries}
+
+        for item in remote:
+            desired_name = desired_names[item.video_id]
+            # If DB knows the current local filename and it already matches and exists -> nothing to do
+            if item.local_filename == desired_name and desired_name in fs_by_name:
+                continue
+
+            # If DB knows a different current filename and it exists -> plan a rename
+            if item.local_filename and item.local_filename in fs_by_name and item.local_filename != desired_name:
+                actions.append(
+                    SyncAction(
+                        SyncActionType.RENAME,
+                        item=item,
+                        from_name=item.local_filename,
+                        to_name=desired_name,
+                    )
+                )
+                continue
+
+            # If the desired file already exists on disk but DB doesn't reflect it -> skip (already correct)
+            if desired_name in fs_by_name:
+                actions.append(SyncAction(SyncActionType.SKIP, item=item, to_name=desired_name))
+                continue
+
+            # Otherwise, we need to download
+            actions.append(SyncAction(SyncActionType.DOWNLOAD, item=item, to_name=desired_name))
+
+        known_ids = {i.video_id for i in remote}
+        for vid, db_item in db_index.items():
+            if vid not in known_ids and db_item.local_filename:
+                actions.append(SyncAction(SyncActionType.DELETE, item=db_item, from_name=db_item.local_filename))
+
+        return actions

src/app/core/sync/executor.py

@@ -0,0 +1,420 @@
+from __future__ import annotations
+
+import asyncio
+import time
+import shutil
+from pathlib import Path
+from typing import Iterable, List
+
+from ..download.queue_manager import DownloadJob, QueueManager
+from ..download.workers import default_worker
+from ..models import SyncAction, SyncActionType
+from ..sync.reorder import safe_multi_rename
+from ..database.db import Database
+from ..utils.yt import extract_playlist_id
+from ..events.event_bus import EventBus
+from ..utils.deps import ensure_ffmpeg_available, ensure_yt_dlp_available
+from ..utils.rate_limit import is_youtube_rate_limit_error
+
+
+class ActionExecutor:
+    """Apply sync actions against the filesystem and persist their outcome.
+
+    The executor is the imperative half of the sync pipeline: it publishes
+    lifecycle events, performs safe renames and deletions, coordinates the
+    download queue, and updates the database after each job completes.
+    """
+
+    def __init__(self, db: Database, concurrency: int = 2, event_bus: EventBus | None = None) -> None:
+        self.concurrency = max(1, concurrency)
+        self.db = db
+        self.bus = event_bus
+
+    async def execute(self, actions: Iterable[SyncAction], playlist_cfg: dict, *, cancel_check=None, pause_check=None) -> None:
+        """Execute a batch of sync actions for one playlist.
+
+        The workflow is intentionally ordered: announce the sync, wait for any
+        pause state to clear, validate dependencies, perform renames, recycle
+        deletions, and finally run downloads with bounded concurrency.
+        """
+        actions_list = list(actions)
+        playlist_id = extract_playlist_id(playlist_cfg.get("url", "")) or playlist_cfg.get("url", "")
+        start = time.monotonic()
+        counts: dict[str, int] = {}
+        for a in actions_list:
+            counts[a.type.name] = counts.get(a.type.name, 0) + 1
+
+        if self.bus:
+            await self.bus.publish(
+                "SyncStarted",
+                {
+                    "playlist_id": playlist_id,
+                    "actions_total": sum(counts.values()),
+                    "counts": dict(counts),
+                },
+            )
+
+        if not await self._wait_if_paused(pause_check, cancel_check):
+            return
+        self._preflight_dependencies(actions_list, playlist_cfg)
+
+        save_path = Path(playlist_cfg.get("save_path", "./downloads")).resolve()
+        mode = playlist_cfg.get("download_mode", "video")
+
+        # Prepare roots
+        audio_root = save_path / "audio"
+        video_root = save_path / "video"
+        audio_root.mkdir(parents=True, exist_ok=True)
+        video_root.mkdir(parents=True, exist_ok=True)
+
+        # First, handle renames safely in batch per extension
+        if not await self._wait_if_paused(pause_check, cancel_check):
+            return
+        await self._apply_renames(actions_list, audio_root, video_root, playlist_cfg)
+
+        # Then, recycle deletions
+        if not await self._wait_if_paused(pause_check, cancel_check):
+            return
+        self._apply_deletions(actions_list, audio_root, video_root, playlist_cfg)
+
+        # Finally, perform downloads concurrently
+        if not await self._wait_if_paused(pause_check, cancel_check):
+            return
+        await self._apply_downloads(
+            actions_list,
+            mode,
+            audio_root,
+            video_root,
+            playlist_cfg,
+            cancel_check=cancel_check,
+            pause_check=pause_check,
+        )
+
+        duration_s = round(time.monotonic() - start, 3)
+        # Persist last sync timestamp (single source of truth for CLI/GUI/automation).
+        try:
+            self.db.set_playlist_last_sync(playlist_id)
+            last_sync = self.db.get_playlist_last_sync(playlist_id)
+        except Exception:
+            last_sync = None
+        summary = {
+            "playlist_id": playlist_id,
+            "duration_s": duration_s,
+            "counts": dict(counts),
+            "last_sync": last_sync,
+        }
+        if self.bus:
+            await self.bus.publish("SyncSummary", dict(summary))
+            await self.bus.publish("SyncFinished", dict(summary))
+
+    async def _wait_if_paused(self, pause_check, cancel_check) -> bool:
+        if not callable(pause_check):
+            return True
+        while pause_check():
+            if callable(cancel_check) and cancel_check():
+                return False
+            await asyncio.sleep(0.1)
+        return True
+
+    def _preflight_dependencies(self, actions: Iterable[SyncAction], playlist_cfg: dict) -> None:
+        """
+        Fail fast on core runtime dependencies before doing any filesystem work.
+
+        This keeps errors consistent regardless of entrypoint (CLI, bootstrap, tests, etc.).
+        """
+        needs_download = any(a.type == SyncActionType.DOWNLOAD for a in actions)
+        if not needs_download:
+            return
+
+        # yt-dlp is required for any download job (Python API usage)
+        ensure_yt_dlp_available()
+
+        # ffmpeg is only required when we will extract audio (audio/both modes)
+        needs_audio = any((a.to_name or "").lower().endswith(".mp3") for a in actions if a.type == SyncActionType.DOWNLOAD)
+        if needs_audio:
+            ffmpeg_hint = playlist_cfg.get("ffmpeg_path", "ffmpeg")
+            ensure_ffmpeg_available(str(ffmpeg_hint) if ffmpeg_hint is not None else None)
+
+    async def _apply_renames(self, actions: Iterable[SyncAction], audio_root: Path, video_root: Path, playlist_cfg: dict) -> None:
+        """Apply all rename actions in batches separated by output type."""
+        playlist_id = extract_playlist_id(playlist_cfg.get("url", "")) or playlist_cfg.get("url", "")
+        audio_renames = []
+        video_renames = []
+        applied: List[SyncAction] = []
+        for a in actions:
+            if a.type != SyncActionType.RENAME or not a.from_name or not a.to_name:
+                continue
+            if a.to_name.endswith(".mp3"):
+                audio_renames.append((audio_root / a.from_name, audio_root / a.to_name))
+            elif a.to_name.endswith(".mp4"):
+                video_renames.append((video_root / a.from_name, video_root / a.to_name))
+            applied.append(a)
+
+        if audio_renames:
+            safe_multi_rename(audio_renames)
+        if video_renames:
+            safe_multi_rename(video_renames)
+
+        # Update DB filenames after successful rename attempts
+        for a in applied:
+            if a.item and a.to_name:
+                try:
+                    self.db.update_local_filename(playlist_id, a.item.video_id, a.to_name)
+                except Exception:
+                    pass
+                if self.bus:
+                    await self.bus.publish("RenameApplied", {"playlist_id": playlist_id, "video_id": a.item.video_id, "to": a.to_name})
+
+    def _apply_deletions(self, actions: Iterable[SyncAction], audio_root: Path, video_root: Path, playlist_cfg: dict) -> None:
+        """Recycle or remove files that no longer belong to the playlist."""
+        playlist_id = extract_playlist_id(playlist_cfg.get("url", "")) or playlist_cfg.get("url", "")
+        recycle_audio = audio_root.parent / ".recycle" / "audio"
+        recycle_video = video_root.parent / ".recycle" / "video"
+        recycle_audio.mkdir(parents=True, exist_ok=True)
+        recycle_video.mkdir(parents=True, exist_ok=True)
+
+        for a in actions:
+            if a.type != SyncActionType.DELETE or not a.from_name:
+                continue
+            if a.from_name.endswith(".mp3"):
+                src = audio_root / a.from_name
+                dst = recycle_audio / a.from_name
+            else:
+                src = video_root / a.from_name
+                dst = recycle_video / a.from_name
+            if src.exists():
+                try:
+                    if dst.exists():
+                        dst.unlink()
+                    shutil.move(str(src), str(dst))
+                except Exception:
+                    # fallback to delete if move fails
+                    try:
+                        src.unlink()
+                    except Exception:
+                        pass
+            # Update DB to clear file state
+            if a.item:
+                try:
+                    self.db.clear_file_state(playlist_id, a.item.video_id)
+                except Exception:
+                    pass
+                if self.bus:
+                    asyncio.create_task(self.bus.publish("FileRecycled", {"playlist_id": playlist_id, "video_id": a.item.video_id, "name": a.from_name}))
+
+    async def _apply_downloads(
+        self,
+        actions: Iterable[SyncAction],
+        mode: str,
+        audio_root: Path,
+        video_root: Path,
+        playlist_cfg: dict,
+        *,
+        cancel_check=None,
+        pause_check=None,
+    ) -> None:
+        """Queue and run download jobs, then persist their final state."""
+        playlist_id = extract_playlist_id(playlist_cfg.get("url", "")) or playlist_cfg.get("url", "")
+        loop = asyncio.get_running_loop()
+        concurrency_cfg = playlist_cfg.get("max_parallel_downloads", self.concurrency)
+        try:
+            concurrency = int(concurrency_cfg) if concurrency_cfg is not None else self.concurrency
+        except Exception:
+            concurrency = self.concurrency
+        queue = QueueManager(concurrency=concurrency)
+
+        retry_max_cfg = playlist_cfg.get("retry_max_retries", 2)
+        retry_delay_cfg = playlist_cfg.get("retry_delay_seconds", 1.5)
+        try:
+            retry_max_retries = int(retry_max_cfg) if retry_max_cfg is not None else 2
+        except Exception:
+            retry_max_retries = 2
+        try:
+            retry_delay_seconds = float(retry_delay_cfg) if retry_delay_cfg is not None else 1.5
+        except Exception:
+            retry_delay_seconds = 1.5
+
+        delay_cfg = playlist_cfg.get("delay_between_downloads_seconds", 0.0)
+        try:
+            delay_between_downloads_seconds = float(delay_cfg) if delay_cfg is not None else 0.0
+        except Exception:
+            delay_between_downloads_seconds = 0.0
+
+        rate_limit_pause = asyncio.Event()
+        rate_limit_emitted = False
+
+        async def worker(job: DownloadJob):
+            nonlocal rate_limit_emitted
+            job.playlist_id = playlist_id
+            job.cancel_check = cancel_check
+            if not await self._wait_if_paused(pause_check, cancel_check):
+                job.error = "cancelled"
+                return
+
+            if self.bus:
+                def _progress_cb(info: dict):
+                    payload = dict(info)
+                    payload.setdefault("playlist_id", playlist_id)
+                    if job.item:
+                        payload.setdefault("video_id", job.item.video_id)
+                    loop.call_soon_threadsafe(asyncio.create_task, self.bus.publish("DownloadProgress", payload))
+
+                job.progress_callback = _progress_cb
+
+            if self.bus and job.item:
+                await self.bus.publish("DownloadStarted", {"playlist_id": playlist_id, "video_id": job.item.video_id, "target": str(job.output_path)})
+            await default_worker(job, max_retries=retry_max_retries, delay_seconds=retry_delay_seconds)
+
+            # If we hit YouTube bot-check / rate-limit, pause the whole playlist sync:
+            # - stop scheduling/processing more jobs
+            # - surface a single SyncPaused event
+            if is_youtube_rate_limit_error(getattr(job, "error", None)):
+                rate_limit_pause.set()
+                if self.bus and not rate_limit_emitted:
+                    rate_limit_emitted = True
+                    await self.bus.publish(
+                        "SyncPaused",
+                        {"playlist_id": playlist_id, "video_id": getattr(getattr(job, "item", None), "video_id", None), "reason": "paused due to youtube rate limits"},
+                    )
+                return
+
+            if delay_between_downloads_seconds > 0 and not (callable(cancel_check) and cancel_check()):
+                # Gentle throttle between jobs to reduce rate limiting.
+                await asyncio.sleep(delay_between_downloads_seconds)
+
+        await queue.start(worker)
+        try:
+            jobs: List[DownloadJob] = []
+
+            # Collapse 'both' into single video download + local audio extraction
+            # Build per-video desired outputs
+            by_vid: dict[str, dict[str, str]] = {}
+            for a in actions:
+                if a.type != SyncActionType.DOWNLOAD or not a.item or not a.to_name:
+                    continue
+                d = by_vid.setdefault(a.item.video_id, {})
+                if a.to_name.endswith(".mp3"):
+                    d["audio"] = a.to_name
+                elif a.to_name.endswith(".mp4"):
+                    d["video"] = a.to_name
+
+            ffmpeg_cfg = str(playlist_cfg.get("ffmpeg_path", "ffmpeg")) if playlist_cfg.get("ffmpeg_path") is not None else None
+            max_quality_cfg = playlist_cfg.get("max_download_quality")
+            temp_video_root = video_root / ".tmp"
+            temp_video_root.mkdir(parents=True, exist_ok=True)
+
+            for a in actions:
+                if callable(cancel_check) and cancel_check():
+                    break
+                if not await self._wait_if_paused(pause_check, cancel_check):
+                    break
+                if rate_limit_pause.is_set():
+                    break
+                if a.type != SyncActionType.DOWNLOAD or not a.item or not a.to_name:
+                    continue
+                vid = a.item.video_id
+                targets = by_vid.get(vid, {})
+
+                # If both audio and video requested for this video id, enqueue only video job with audio_output_path
+                if targets.get("audio") and targets.get("video"):
+                    # only create job once, when encountering the video target
+                    if a.to_name.endswith(".mp4"):
+                        video_path = video_root / targets["video"]
+                        audio_path = audio_root / targets["audio"]
+                        for p in (video_path.parent, audio_path.parent):
+                            p.mkdir(parents=True, exist_ok=True)
+                        url = f"https://www.youtube.com/watch?v={vid}"
+                        job = DownloadJob(
+                            item=a.item,
+                            output_path=video_path,
+                            url=url,
+                            mode="video",
+                            ffmpeg_path=ffmpeg_cfg,
+                            max_download_quality=max_quality_cfg,
+                            audio_output_path=audio_path,
+                        )
+                        jobs.append(job)
+                        await queue.enqueue(job)
+                    # skip creating a separate audio job
+                    continue
+
+                # Normal single-output path
+                is_audio = a.to_name.endswith(".mp3")
+                url = f"https://www.youtube.com/watch?v={vid}"
+
+                if is_audio:
+                    # Audio-only: download video to temp, extract mp3, then delete video
+                    audio_path = audio_root / a.to_name
+                    audio_path.parent.mkdir(parents=True, exist_ok=True)
+                    # build temp video filename from audio base
+                    temp_base = a.to_name.rsplit(".", 1)[0] + ".mp4"
+                    video_temp = temp_video_root / temp_base
+                    job = DownloadJob(
+                        item=a.item,
+                        output_path=video_temp,
+                        url=url,
+                        mode="video",
+                        ffmpeg_path=ffmpeg_cfg,
+                        max_download_quality=max_quality_cfg,
+                        audio_output_path=audio_path,
+                        keep_video=False,
+                    )
+                    jobs.append(job)
+                    await queue.enqueue(job)
+                else:
+                    # Video-only
+                    video_path = video_root / a.to_name
+                    video_path.parent.mkdir(parents=True, exist_ok=True)
+                    job = DownloadJob(
+                        item=a.item,
+                        output_path=video_path,
+                        url=url,
+                        mode="video",
+                        ffmpeg_path=ffmpeg_cfg,
+                        max_download_quality=max_quality_cfg,
+                    )
+                    jobs.append(job)
+                    await queue.enqueue(job)
+        finally:
+            join_task = asyncio.create_task(queue.join())
+            try:
+                while not join_task.done():
+                    if callable(cancel_check) and cancel_check():
+                        join_task.cancel()
+                        break
+                    if callable(pause_check) and pause_check():
+                        # Pause requested: stop starting more work and return control.
+                        join_task.cancel()
+                        break
+                    if rate_limit_pause.is_set():
+                        join_task.cancel()
+                        break
+                    await asyncio.sleep(0.1)
+            finally:
+                await queue.stop()
+
+        # Persist DB updates for completed jobs
+        for job in locals().get("jobs", []):
+            if job.item and job.output_path:
+                try:
+                    if job.state.name == "COMPLETED":
+                        # Prefer audio filename if produced
+                        final_name = job.audio_output_path.name if job.audio_output_path is not None else job.output_path.name
+                        self.db.update_local_filename(playlist_id, job.item.video_id, final_name)
+                        self.db.mark_downloaded(playlist_id, job.item.video_id, True)
+                        if self.bus:
+                            await self.bus.publish("DownloadCompleted", {"playlist_id": playlist_id, "video_id": job.item.video_id, "target": str(job.audio_output_path or job.output_path)})
+                    else:
+                        # Ensure not marked as downloaded if failed
+                        self.db.mark_downloaded(playlist_id, job.item.video_id, False)
+                        if self.bus:
+                            err = job.error or "unknown"
+                            if is_youtube_rate_limit_error(err):
+                                await self.bus.publish(
+                                    "DownloadFailed",
+                                    {"playlist_id": playlist_id, "video_id": job.item.video_id, "error": "paused due to youtube rate limits"},
+                                )
+                            else:
+                                await self.bus.publish("DownloadFailed", {"playlist_id": playlist_id, "video_id": job.item.video_id, "error": err})
+                except Exception:
+                    pass

src/app/core/sync/filesystem.py

@@ -0,0 +1,17 @@
+from __future__ import annotations
+
+from pathlib import Path
+from typing import List, Sequence
+
+from ..models import FilesystemEntry
+
+
+def list_files(root: Path, extensions: Sequence[str]) -> List[FilesystemEntry]:
+    exts = {e.lower() for e in extensions}
+    results: List[FilesystemEntry] = []
+    if not root.exists():
+        return results
+    for p in root.glob("**/*"):
+        if p.is_file() and p.suffix.lower() in exts:
+            results.append(FilesystemEntry(name=p.name, path=p))
+    return results

src/app/core/sync/reorder.py

@@ -0,0 +1,43 @@
+from __future__ import annotations
+
+from pathlib import Path
+from typing import Dict, Iterable, Tuple
+
+
+def safe_multi_rename(renames: Iterable[Tuple[Path, Path]]) -> None:
+    """
+    Apply multiple renames safely using a two-pass strategy to avoid
+    name collisions. Each item is a tuple (src_path, dst_path).
+    """
+    temp_suffix = ".renametemp"
+    planned = list(renames)
+    existing_dests = {dst for _, dst in planned}
+
+    # Pass 1: move all sources that would collide to temporary names
+    temps: Dict[Path, Path] = {}
+    for src, dst in planned:
+        if not src.exists():
+            continue
+        if src.name == dst.name:
+            continue
+        # If destination exists or another source will become destination, use temp
+        if dst.exists() or dst in existing_dests:
+            tmp = src.with_suffix(src.suffix + temp_suffix)
+            # Ensure unique temp
+            i = 0
+            while tmp.exists():
+                i += 1
+                tmp = src.with_name(src.name + f".{i}" + temp_suffix)
+            src.rename(tmp)
+            temps[tmp] = dst
+        else:
+            # direct rename safe
+            src.rename(dst)
+
+    # Pass 2: move all temp files to their final destinations
+    for tmp, dst in temps.items():
+        if not tmp.exists():
+            continue
+        if dst.exists():
+            dst.unlink()
+        tmp.rename(dst)

src/app/core/sync/service.py

@@ -0,0 +1,134 @@
+from __future__ import annotations
+
+from pathlib import Path
+from typing import List
+
+from ..database.db import Database
+from ..models import PlaylistItem, SyncAction
+from ..scanner.playlist_scanner import PlaylistScanner
+from ..sync.diff_engine import DiffEngine
+from ..sync.filesystem import list_files
+from ..utils.naming import sanitize_title
+from ..utils.yt import extract_playlist_id
+
+
+class SyncService:
+    """High-level orchestration for a single playlist sync pass.
+
+    The service pulls the latest remote playlist snapshot, persists the
+    playlist and item metadata in the database, and asks the diff engine to
+    compare the remote state with the local filesystem.
+    """
+
+    def __init__(self, db: Database) -> None:
+        self.db = db
+        self.scanner = PlaylistScanner()
+        self.diff = DiffEngine()
+
+    def _mode_to_extensions(self, mode: str) -> list[str]:
+        if mode == "audio":
+            return [".mp3"]
+        if mode == "video":
+            return [".mp4"]
+        if mode == "both":
+            return [".mp3", ".mp4"]
+        return [".mp4"]
+
+    def sync_from_config(self, playlist_cfg: dict) -> List[SyncAction]:
+        """Return the sync actions required to bring one playlist in sync.
+
+        This method does not apply any changes itself. It normalizes the
+        configuration, refreshes the playlist/item records in SQLite, and then
+        computes the actions needed for the configured download mode.
+        """
+        url: str = playlist_cfg.get("url")
+        mode: str = playlist_cfg.get("download_mode", "video")
+        save_path = Path(playlist_cfg.get("save_path", "./downloads")).resolve()
+        save_path.mkdir(parents=True, exist_ok=True)
+
+        playlist_id = extract_playlist_id(url) or url
+        # Ensure playlist row exists/updated
+        self.db.upsert_playlist(
+            id=playlist_id,
+            name=playlist_cfg.get("name"),
+            url=url,
+            path=str(save_path),
+            mode=mode,
+            auto_sync=int(bool(playlist_cfg.get("auto_sync", False))),
+            sync_interval_minutes=int(playlist_cfg.get("sync_interval_minutes", 0) or 0),
+        )
+        ffmpeg_cfg = playlist_cfg.get("ffmpeg_path")
+        items = self.scanner.scan(url, playlist_id, ffmpeg_path=str(ffmpeg_cfg) if ffmpeg_cfg is not None else None)
+
+        sanitized: List[PlaylistItem] = []
+        for it in items:
+            safe_title = sanitize_title(it.title, it.video_id)
+            sanitized.append(
+                PlaylistItem(
+                    playlist_id=it.playlist_id,
+                    video_id=it.video_id,
+                    title=safe_title,
+                    playlist_index=it.playlist_index,
+                    local_filename=None,
+                    downloaded=False,
+                )
+            )
+
+        rows = [
+            (
+                it.playlist_id,
+                it.video_id,
+                it.title,
+                it.playlist_index,
+                None,
+                0,
+            )
+            for it in sanitized
+        ]
+        self.db.upsert_playlist_items(rows)
+
+        db_index_rows = self.db.get_items_index(playlist_id)
+        db_index: dict[str, PlaylistItem] = {}
+        for vid, row in db_index_rows.items():
+            db_index[vid] = PlaylistItem(
+                playlist_id=row["playlist_id"],
+                video_id=row["video_id"],
+                title=row["title"],
+                playlist_index=row["playlist_index"],
+                local_filename=row["local_filename"],
+                downloaded=bool(row["downloaded"]),
+            )
+
+        # Augment remote items with DB-known filenames/download flags
+        augmented: List[PlaylistItem] = []
+        for it in sanitized:
+            known = db_index.get(it.video_id)
+            if known is None:
+                augmented.append(it)
+            else:
+                augmented.append(
+                    PlaylistItem(
+                        playlist_id=it.playlist_id,
+                        video_id=it.video_id,
+                        title=it.title,
+                        playlist_index=it.playlist_index,
+                        local_filename=known.local_filename,
+                        downloaded=known.downloaded,
+                    )
+                )
+
+        exts = self._mode_to_extensions(mode)
+        merged_actions: List[SyncAction] = []
+
+        # Compute per-extension actions against respective roots
+        for ext in exts:
+            if ext == ".mp3":
+                fs = list_files(save_path / "audio", [".mp3"])
+            elif ext == ".mp4":
+                fs = list_files(save_path / "video", [".mp4"])
+            else:
+                fs = list_files(save_path, [ext])
+            actions = self.diff.compute_actions(augmented, db_index, fs, ext)
+            merged_actions.extend(actions)
+
+        return merged_actions

src/app/core/utils/__init__.py

@@ -0,0 +1 @@
+"""Utility helpers for naming, parsing, etc."""

src/app/core/utils/deps.py

@@ -0,0 +1,93 @@
+from __future__ import annotations
+
+import os
+import subprocess
+import sys
+from dataclasses import dataclass
+from pathlib import Path
+from shutil import which
+from typing import Optional, Tuple
+
+
+class DependencyError(RuntimeError):
+    pass
+
+
+@dataclass(frozen=True)
+class DependencyStatus:
+    yt_dlp_ok: bool
+    yt_dlp_version: Optional[str]
+    ffmpeg_ok: bool
+    ffmpeg_path: Optional[str]
+    ffprobe_ok: bool
+    ffprobe_path: Optional[str]
+
+
+def get_yt_dlp_version() -> Optional[str]:
+    try:
+        import yt_dlp  # type: ignore
+
+        # yt-dlp exposes version in different places depending on install
+        return getattr(yt_dlp, "__version__", None) or getattr(getattr(yt_dlp, "version", None), "__version__", None)
+    except Exception:
+        return None
+
+
+def ensure_yt_dlp_available() -> str:
+    """
+    Ensures yt-dlp Python package is importable. Returns version string when known.
+    """
+    try:
+        import yt_dlp  # noqa: F401  # type: ignore
+    except Exception as exc:
+        raise DependencyError("yt-dlp Python package is required. Install with: pip install -U yt-dlp") from exc
+    return get_yt_dlp_version() or "unknown"
+
+
+def _resolve_tool_paths(tool_hint: Optional[str], exe_name: str) -> Tuple[Optional[str], Optional[str]]:
+    """
+    Returns (resolved_exe_path, resolved_dir_hint).
+    - If tool_hint is a file path, use it.
+    - If tool_hint is a directory, append exe_name.
+    - Otherwise, treat tool_hint as a command and fall back to PATH resolution.
+    """
+    if tool_hint:
+        hint_str = str(tool_hint).strip().strip('"').strip("'")
+        hint = Path(hint_str)
+        # Expand envvars (%FFMPEG%) etc.
+        expanded = Path(os.path.expandvars(str(hint)))
+        if expanded.is_dir():
+            cand = expanded / exe_name
+            if cand.exists():
+                return str(cand), str(expanded)
+        if expanded.exists():
+            return str(expanded), str(expanded.parent)
+
+    # PATH lookup
+    found = which(exe_name)
+    if found:
+        return found, str(Path(found).parent)
+    return None, None
+
+
+def ensure_ffmpeg_available(ffmpeg_hint: Optional[str]) -> Tuple[str, str]:
+    """
+    Ensures ffmpeg is runnable. Returns (ffmpeg_path, ffmpeg_path).
+
+    Note: ffprobe is intentionally not required. This project uses ffmpeg directly for
+    audio extraction, and yt-dlp can still function for muxed downloads without ffprobe.
+    """
+    ffmpeg_exe = "ffmpeg.exe" if sys.platform.startswith("win") else "ffmpeg"
+
+    ffmpeg_path, ffmpeg_dir = _resolve_tool_paths(ffmpeg_hint, ffmpeg_exe)
+    if not ffmpeg_path:
+        raise DependencyError("ffmpeg not found. Install ffmpeg or set 'ffmpeg_path' in config.")
+
+    # Smoke test (fast)
+    try:
+        subprocess.run([ffmpeg_path, "-version"], check=True, stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL)
+    except Exception as exc:
+        raise DependencyError("ffmpeg exists but is not runnable. Check permissions/architecture/path.") from exc
+
+    # Keep return shape stable for existing callers
+    return ffmpeg_path, ffmpeg_path

src/app/core/utils/logging_setup.py

@@ -0,0 +1,37 @@
+from __future__ import annotations
+
+import logging
+from logging.handlers import RotatingFileHandler
+from pathlib import Path
+
+
+def configure_logging(*, verbose: bool = False, log_file: Path | None = None) -> None:
+    """
+    Configure app-wide logging.
+
+    - Console handler always enabled.
+    - Rotating file handler enabled when log_file is provided.
+    """
+    root = logging.getLogger()
+    root.setLevel(logging.DEBUG if verbose else logging.INFO)
+
+    # Avoid duplicate handlers on repeated calls (tests, re-entrypoints).
+    if getattr(configure_logging, "_configured", False):
+        return
+
+    fmt = logging.Formatter("%(asctime)s %(levelname)s %(name)s: %(message)s")
+
+    console = logging.StreamHandler()
+    console.setLevel(logging.DEBUG if verbose else logging.INFO)
+    console.setFormatter(fmt)
+    root.addHandler(console)
+
+    if log_file is not None:
+        log_file.parent.mkdir(parents=True, exist_ok=True)
+        file_handler = RotatingFileHandler(str(log_file), maxBytes=2_000_000, backupCount=3, encoding="utf-8")
+        file_handler.setLevel(logging.DEBUG)
+        file_handler.setFormatter(fmt)
+        root.addHandler(file_handler)
+
+    configure_logging._configured = True  # type: ignore[attr-defined]
+

src/app/core/utils/naming.py

@@ -0,0 +1,13 @@
+from __future__ import annotations
+
+ILLEGAL_CHARS = '<>:"/\\|?*'
+
+
+def sanitize_title(title: str, fallback: str) -> str:
+    table = str.maketrans({c: "-" for c in ILLEGAL_CHARS})
+    safe = (title or "").translate(table).strip()
+    return safe if safe else fallback
+
+
+def make_filename(index: int, title: str, ext: str, width: int = 4) -> str:
+    return f"{index:0{width}d} - {title}{ext}"

src/app/core/utils/rate_limit.py

@@ -0,0 +1,23 @@
+from __future__ import annotations
+
+
+def is_youtube_rate_limit_error(message: str | None) -> bool:
+    """
+    Best-effort detection of YouTube "bot check" / auth-gated extraction failures.
+
+    yt-dlp typically surfaces this as:
+      - "Sign in to confirm you’re not a bot"
+      - mentions of --cookies / --cookies-from-browser
+    """
+    if not message:
+        return False
+    s = str(message).lower()
+    needles = [
+        "sign in to confirm",
+        "you're not a bot",
+        "you’re not a bot",
+        "--cookies-from-browser",
+        "--cookies",
+    ]
+    return any(n in s for n in needles)
+

src/app/core/utils/version.py

@@ -0,0 +1,38 @@
+from __future__ import annotations
+
+import sys
+from pathlib import Path
+
+
+def _resource_base() -> Path:
+    # PyInstaller sets sys._MEIPASS to the temp extraction dir.
+    base = getattr(sys, "_MEIPASS", None)
+    if base:
+        return Path(str(base))
+    return Path.cwd()
+
+
+def _read_text(path: Path) -> str | None:
+    try:
+        if path.exists():
+            text = path.read_text(encoding="utf-8").strip()
+            return text or None
+    except Exception:
+        pass
+    return None
+def get_app_version() -> str:
+    """
+    Returns the packaged app version.
+
+    In release builds this reads from `version.txt` bundled into the EXE.
+    """
+    candidates = [
+        Path("version.txt"),
+        _resource_base() / "version.txt",
+    ]
+    for candidate in candidates:
+        text = _read_text(candidate)
+        if text:
+            return text
+
+    return "dev"

src/app/core/utils/yt.py

@@ -0,0 +1,14 @@
+from __future__ import annotations
+
+from urllib.parse import parse_qs, urlparse
+
+
+def extract_playlist_id(url: str) -> str | None:
+    try:
+        parsed = urlparse(url)
+        qs = parse_qs(parsed.query)
+        if "list" in qs and qs.get("list"):
+            return qs.get("list", [None])[0]
+        return None
+    except Exception:
+        return None

src/app/gui/__init__.py

@@ -0,0 +1,2 @@
+from __future__ import annotations
+

src/app/gui/app_icon.py

@@ -0,0 +1,46 @@
+from __future__ import annotations
+
+import sys
+from pathlib import Path
+
+from PySide6 import QtGui, QtWidgets
+
+
+def _resource_base() -> Path:
+    # PyInstaller sets sys._MEIPASS to the temp extraction dir.
+    base = getattr(sys, "_MEIPASS", None)
+    if base:
+        return Path(str(base))
+    return Path.cwd()
+
+
+def load_app_icon() -> QtGui.QIcon:
+    """
+    Best-effort app icon loader.
+
+    Looks for `assets/icon.png` in the current working directory (dev),
+    or in the PyInstaller bundle root (packaged).
+    """
+    candidates = [
+        Path("assets/icon.png"),
+        _resource_base() / "assets" / "icon.png",
+    ]
+    for p in candidates:
+        try:
+            if p.exists():
+                icon = QtGui.QIcon(str(p))
+                if not icon.isNull():
+                    return icon
+        except Exception:
+            pass
+
+    # Fallback to a platform theme icon (Linux) or a generic icon.
+    try:
+        themed = QtGui.QIcon.fromTheme("applications-multimedia")
+        if not themed.isNull():
+            return themed
+    except Exception:
+        pass
+
+    return QtWidgets.QApplication.style().standardIcon(QtWidgets.QStyle.StandardPixmap.SP_ComputerIcon)
+

src/app/gui/bus_bridge.py

@@ -0,0 +1,40 @@
+from __future__ import annotations
+from typing import Any, Dict
+from PySide6 import QtCore
+
+from ..core.events.event_bus import EventBus
+
+
+class BusBridge(QtCore.QObject):
+    """
+    Bridges backend EventBus async events onto the Qt main thread.
+
+    Emits `event(name, payload)` as a Qt signal, thread-safe.
+    """
+
+    event = QtCore.Signal(str, dict)
+
+    def __init__(self, bus: EventBus, parent: QtCore.QObject | None = None) -> None:
+        super().__init__(parent)
+        self._bus = bus
+
+        for name in (
+            "SyncStarted",
+            "SyncSummary",
+            "SyncFinished",
+            "DownloadStarted",
+            "DownloadProgress",
+            "DownloadCompleted",
+            "DownloadFailed",
+            "RenameApplied",
+            "FileRecycled",
+        ):
+            self._bus.subscribe(name, self._make_handler(name))
+
+    def _make_handler(self, name: str):
+        async def handler(payload: Dict[str, Any]) -> None:
+            # Ensure delivery on the Qt main thread.
+            self.event.emit(name, dict(payload))
+
+        return handler
+

src/app/gui/config_store.py

@@ -0,0 +1,37 @@
+from __future__ import annotations
+
+import json
+from dataclasses import dataclass
+from pathlib import Path
+from typing import Any, Dict
+
+
+@dataclass(frozen=True)
+class AppConfig:
+    data: Dict[str, Any]
+    path: Path
+
+
+def load_config(path: Path) -> AppConfig:
+    raw = json.loads(path.read_text(encoding="utf-8"))
+    if not isinstance(raw, dict):
+        raise ValueError("config root must be a JSON object")
+    return AppConfig(data=raw, path=path)
+
+
+def save_config(path: Path, data: Dict[str, Any]) -> None:
+    path.parent.mkdir(parents=True, exist_ok=True)
+    payload = json.dumps(data, indent=2, ensure_ascii=False) + "\n"
+    path.write_text(payload, encoding="utf-8")
+
+
+def normalize_config(data: Dict[str, Any]) -> Dict[str, Any]:
+    """
+    Ensure basic expected shape for config dict.
+    Keeps unknown keys intact.
+    """
+    out = dict(data)
+    pls = out.get("playlists")
+    if not isinstance(pls, list):
+        out["playlists"] = []
+    return out

src/app/gui/main.py

@@ -0,0 +1,500 @@
+from __future__ import annotations
+
+import sys
+import threading
+
+from PySide6 import QtCore, QtGui, QtWidgets
+
+from ..config.settings import Settings
+from ..core.events.event_bus import EventBus
+from .bus_bridge import BusBridge
+from .app_icon import load_app_icon
+from .config_store import load_config
+from .runner import SyncRequest, SyncRunner
+from .pages.playlists import PlaylistManagerPage
+from .pages.queue import QueuePage
+from .pages.logs import LogsPage
+from .pages.settings import SettingsPage
+from .pages.about import AboutPage
+
+
+class MainWindow(QtWidgets.QMainWindow):
+    def __init__(self) -> None:
+        super().__init__()
+        self.setWindowTitle("ytpl-sync")
+        self.resize(1100, 700)
+        self.setWindowIcon(load_app_icon())
+
+        self._settings = Settings()
+        self._bus = EventBus()
+        self._bridge = BusBridge(self._bus)
+
+        self._thread: QtCore.QThread | None = None
+        self._runner: SyncRunner | None = None
+        self._cancel_flag: threading.Event | None = None
+        self._pause_flag: threading.Event | None = None
+        self._tray: QtWidgets.QSystemTrayIcon | None = None
+        self._tray_notified = False
+
+        # Sidebar navigation
+        self._nav = QtWidgets.QListWidget()
+        self._nav.setObjectName("sidebar")
+        self._nav.setSpacing(2)
+        self._nav.setHorizontalScrollBarPolicy(
+            QtCore.Qt.ScrollBarPolicy.ScrollBarAlwaysOff
+        )
+        self._nav.setVerticalScrollBarPolicy(
+            QtCore.Qt.ScrollBarPolicy.ScrollBarAsNeeded
+        )
+        self._nav.setSelectionMode(QtWidgets.QAbstractItemView.SelectionMode.SingleSelection)
+        self._nav.model().rowsInserted.connect(self._update_sidebar_width)
+        self._nav.model().dataChanged.connect(self._update_sidebar_width)
+        self._nav.model().rowsRemoved.connect(self._update_sidebar_width)
+
+        self._stack = QtWidgets.QStackedWidget()
+        self._playlists_page = PlaylistManagerPage(self._settings)
+        self._queue_page = QueuePage()
+        self._logs_page = LogsPage()
+        self._settings_page = SettingsPage()
+        self._about_page = AboutPage()
+
+        self._pages: list[QtWidgets.QWidget] = [
+            self._playlists_page,
+            self._queue_page,
+            self._logs_page,
+            self._settings_page,
+            self._about_page,
+        ]
+        for p in self._pages:
+            self._stack.addWidget(p)
+
+        for label in ("Playlists", "Queue", "Logs", "Settings", "About"):
+            self._add_sidebar_item(label)
+
+        self._nav.currentRowChanged.connect(self._stack.setCurrentIndex)
+        self._nav.setCurrentRow(0)
+
+        # Layout
+        root = QtWidgets.QWidget()
+        layout = QtWidgets.QHBoxLayout(root)
+        layout.setContentsMargins(0, 0, 0, 0)
+        layout.addWidget(self._nav)
+        layout.addWidget(self._stack, 1)
+        self.setCentralWidget(root)
+
+        self._bridge.event.connect(self._on_bus_event)
+        self._apply_style()
+
+        # Provide Settings page a concrete config path.
+        cfg_path = getattr(self._settings, "path", None)
+        if cfg_path is not None:
+            try:
+                self._settings_page.set_config_path(cfg_path)
+            except Exception:
+                pass
+
+        self._playlists_page.cancel_requested.connect(self._cancel_sync)
+        self._queue_page.cancel_sync_requested.connect(self._cancel_sync)
+        self._playlists_page.sync_one_requested.connect(self._sync_playlist_index)
+        self._playlists_page.sync_all_requested.connect(self._sync_all)
+        self._playlists_page.pause_requested.connect(self._pause_sync)
+        self._playlists_page.resume_requested.connect(self._resume_sync)
+
+        self._refresh_queue_labels()
+        self._init_tray()
+        QtCore.QTimer.singleShot(0, self._update_sidebar_width)
+
+    def _add_sidebar_item(self, label: str) -> None:
+        item = QtWidgets.QListWidgetItem(label)
+        self._nav.addItem(item)
+        self._update_sidebar_width()
+
+    def _update_sidebar_width(self, *_args: object) -> None:
+        metrics = self._nav.fontMetrics()
+        max_text_width = 0
+        for row in range(self._nav.count()):
+            item = self._nav.item(row)
+            if item is None:
+                continue
+            max_text_width = max(max_text_width, metrics.horizontalAdvance(item.text()))
+
+        if max_text_width <= 0:
+            return
+
+        frame = self._nav.frameWidth() * 2
+        padding = 44
+        target_width = max_text_width + frame + padding
+        self._nav.setFixedWidth(max(120, min(220, target_width)))
+
+    def _tray_config(self) -> dict:
+        # Read from disk so toggles apply immediately (no restart required).
+        try:
+            cfg_path = getattr(self._settings, "path", None)
+            if cfg_path is None:
+                return {}
+            raw = load_config(cfg_path).data
+            ui = raw.get("ui")
+            ui = ui if isinstance(ui, dict) else {}
+            tray = ui.get("tray")
+            tray = tray if isinstance(tray, dict) else {}
+            return dict(tray)
+        except Exception:
+            return {}
+
+    def _close_to_tray_enabled(self) -> bool:
+        return bool(self._tray_config().get("close_to_tray", False))
+
+    def _minimize_to_tray_enabled(self) -> bool:
+        return bool(self._tray_config().get("minimize_to_tray", False))
+
+    def _start_minimized_to_tray_enabled(self) -> bool:
+        return bool(self._tray_config().get("start_minimized_to_tray", False))
+
+    def should_start_minimized_to_tray(self) -> bool:
+        return self._tray is not None and self._start_minimized_to_tray_enabled()
+
+    def _init_tray(self) -> None:
+        # Tray support is optional and platform-dependent (e.g., some Linux DEs).
+        try:
+            if not QtWidgets.QSystemTrayIcon.isSystemTrayAvailable():
+                return
+        except Exception:
+            return
+
+        icon = load_app_icon()
+        tray = QtWidgets.QSystemTrayIcon(icon, self)
+        tray.setToolTip("ytpl-sync")
+
+        menu = QtWidgets.QMenu()
+        act_toggle = menu.addAction("Show/Hide")
+        act_quit = menu.addAction("Quit")
+        tray.setContextMenu(menu)
+
+        act_toggle.triggered.connect(self._toggle_visible)
+        act_quit.triggered.connect(self._quit_from_tray)
+        tray.activated.connect(self._on_tray_activated)
+
+        tray.show()
+        self._tray = tray
+
+    def _toggle_visible(self) -> None:
+        if self.isVisible():
+            self.hide()
+        else:
+            self.show()
+            self.raise_()
+            self.activateWindow()
+
+    def _quit_from_tray(self) -> None:
+        # Ensure the closeEvent doesn't just hide the window.
+        self._tray = None
+        QtWidgets.QApplication.quit()
+
+    def _on_tray_activated(self, reason: QtWidgets.QSystemTrayIcon.ActivationReason) -> None:
+        if reason in (
+            QtWidgets.QSystemTrayIcon.ActivationReason.Trigger,
+            QtWidgets.QSystemTrayIcon.ActivationReason.DoubleClick,
+        ):
+            self._toggle_visible()
+
+    def closeEvent(self, event: QtGui.QCloseEvent) -> None:  # type: ignore[override]
+        # If tray is active and configured, close-to-tray.
+        if self._tray is not None and self._close_to_tray_enabled():
+            event.ignore()
+            self.hide()
+            if not self._tray_notified:
+                self._tray_notified = True
+                try:
+                    self._tray.showMessage(
+                        "ytpl-sync",
+                        "Still running in the tray. Use the tray icon menu to quit.",
+                        QtWidgets.QSystemTrayIcon.MessageIcon.Information,
+                        3000,
+                    )
+                except Exception:
+                    pass
+            return
+        if self._tray is not None and not self._close_to_tray_enabled():
+            # Explicitly quit, because the app may be configured to keep running without windows.
+            try:
+                event.accept()
+            except Exception:
+                pass
+            QtWidgets.QApplication.quit()
+            return
+        super().closeEvent(event)
+
+    def changeEvent(self, event: QtCore.QEvent) -> None:  # type: ignore[override]
+        try:
+            if event.type() == QtCore.QEvent.Type.WindowStateChange:
+                if self._tray is not None and self._minimize_to_tray_enabled():
+                    if bool(self.windowState() & QtCore.Qt.WindowState.WindowMinimized):
+                        QtCore.QTimer.singleShot(0, self.hide)
+        except Exception:
+            pass
+        super().changeEvent(event)
+
+    def _refresh_queue_labels(self) -> None:
+        try:
+            from ..core.utils.yt import extract_playlist_id
+
+            labels: dict[str, str] = {}
+            for idx, pl in enumerate(self._settings.playlists, start=1):
+                url = str(pl.get("url") or "")
+                pid = extract_playlist_id(url) or url
+                labels[pid] = str(pl.get("name") or f"Playlist {idx}")
+            self._queue_page.set_playlist_labels(labels)
+        except Exception:
+            pass
+
+    @QtCore.Slot(str, dict)
+    def _on_bus_event(self, name: str, payload: dict) -> None:
+        # Fan out to interested pages.
+        try:
+            self._queue_page.on_event(name, payload)
+        except Exception:
+            pass
+        try:
+            self._logs_page.on_event(name, payload)
+        except Exception:
+            pass
+        try:
+            self._playlists_page.on_event(name, payload)
+        except Exception:
+            pass
+
+        # Auto-pause on YouTube bot-check/rate-limit surface.
+        if name == "SyncPaused":
+            self._pause_sync()
+
+    def _sync_playlist_index(self, index: int) -> None:
+        playlists = self._settings.playlists
+        if index < 0 or index >= len(playlists):
+            return
+        cfg = dict(playlists[index])
+        self._refresh_queue_labels()
+        self._playlists_page.set_running(True)
+
+        # Stop any previous run
+        if self._thread is not None:
+            self._thread.quit()
+            self._thread.wait(2000)
+            self._thread = None
+            self._runner = None
+            self._cancel_flag = None
+
+        self._thread = QtCore.QThread()
+        self._cancel_flag = threading.Event()
+        self._pause_flag = threading.Event()
+        self._runner = SyncRunner(self._bus)
+        self._runner.moveToThread(self._thread)
+        self._runner.set_request(SyncRequest(playlist_cfg=cfg, apply=True, cancel_flag=self._cancel_flag, pause_flag=self._pause_flag))
+        self._thread.started.connect(self._runner.run_current)
+        self._runner.finished.connect(self._on_sync_finished)
+        self._runner.finished.connect(self._thread.quit)
+        self._thread.start()
+
+    def _sync_all(self) -> None:
+        # Run playlists sequentially (simple + predictable).
+        if self._thread is not None:
+            return
+        self._sync_queue = list(range(len(self._settings.playlists)))
+        if not self._sync_queue:
+            return
+        self._playlists_page.set_running(True)
+        self._sync_playlist_index(self._sync_queue.pop(0))
+
+    @QtCore.Slot(bool, str)
+    def _on_sync_finished(self, ok: bool, message: str) -> None:
+        if not ok:
+            self._logs_page.on_event("SyncError", {"error": message})
+        self._playlists_page.set_running(False)
+
+        # Mark idle so "Sync all" can be started again.
+        if self._thread is not None:
+            try:
+                self._thread.quit()
+                self._thread.wait(2000)
+            except Exception:
+                pass
+        self._runner = None
+        self._cancel_flag = None
+        self._pause_flag = None
+        self._thread = None
+
+        # Reload config in case playlists/settings changed externally during run.
+        try:
+            self._settings = Settings()
+            self._playlists_page.reload_from_config()
+            cfg_path = getattr(self._settings, "path", None)
+            if cfg_path is not None:
+                self._settings_page.set_config_path(cfg_path)
+            self._refresh_queue_labels()
+        except Exception:
+            pass
+
+        # Continue "sync all" chain if active.
+        if hasattr(self, "_sync_queue") and getattr(self, "_sync_queue"):
+            nxt = getattr(self, "_sync_queue").pop(0)
+            self._sync_playlist_index(nxt)
+
+    @QtCore.Slot()
+    def _cancel_sync(self) -> None:
+        if self._cancel_flag is not None:
+            self._cancel_flag.set()
+        if self._pause_flag is not None:
+            self._pause_flag.clear()
+
+    def _pause_sync(self) -> None:
+        if self._pause_flag is not None:
+            self._pause_flag.set()
+
+    def _resume_sync(self) -> None:
+        if self._pause_flag is not None:
+            self._pause_flag.clear()
+
+    def _apply_style(self) -> None:
+        self.setStyleSheet(
+            """
+            QMainWindow { background: #0f1218; color: #d7dce4; }
+            QWidget { font-size: 13px; color: #d7dce4; }
+            QWidget#playlistsPage,
+            QWidget#queuePage,
+            QWidget#logsPage,
+            QWidget#settingsPage,
+            QWidget#aboutPage {
+              background: #0f1218;
+            }
+            QLabel#pageTitle { font-size: 18px; font-weight: 600; padding: 4px 0; }
+            QLabel#cardTitle { font-size: 15px; font-weight: 600; color: #eef2f8; }
+            QLabel[muted="true"] { color: #9aa3b2; }
+            QLabel[link="true"] { color: #6c8bff; }
+            QLabel[link="true"]:hover { color: #8ea7ff; }
+
+            QListWidget#sidebar {
+              background: #0d1015;
+              border-right: 1px solid #2a3140;
+              padding: 8px;
+            }
+            QListWidget#sidebar::item {
+              color: #cfd3da;
+              border-radius: 8px;
+              padding: 8px 10px;
+            }
+            QListWidget#sidebar::item:selected {
+              background: #21304a;
+              color: #ffffff;
+            }
+
+            QTableWidget {
+                background: #171b22;
+                gridline-color: #2a3140;
+                border: 1px solid #2a3140;
+            }
+            QTableWidget::item {
+              padding: 6px 8px;
+            }
+            QPlainTextEdit {
+              background: #11151c;
+              border: 1px solid #2a3140;
+              border-radius: 10px;
+              color: #d7dce4;
+            }
+            QScrollBar:vertical {
+              background: #0f1218;
+              width: 12px;
+              margin: 0px;
+            }
+            QScrollBar::handle:vertical {
+              background: #34465f;
+              min-height: 24px;
+              border-radius: 6px;
+            }
+            QScrollBar::handle:vertical:hover {
+              background: #456183;
+            }
+            QScrollBar::add-line:vertical,
+            QScrollBar::sub-line:vertical,
+            QScrollBar::add-page:vertical,
+            QScrollBar::sub-page:vertical {
+              background: transparent;
+              border: none;
+            }
+            QGroupBox {
+              border: 1px solid #2a3140;
+              border-radius: 12px;
+              margin-top: 14px;
+              padding: 12px;
+              background: #171b22;
+            }
+            QGroupBox::title {
+              subcontrol-origin: margin;
+              left: 12px;
+              padding: 0 6px;
+              color: #e2e7ef;
+              background: #171b22;
+            }
+            QFrame#aboutCard {
+              background: #171b22;
+              border: 1px solid #2a3140;
+              border-radius: 14px;
+            }
+            QHeaderView::section {
+              background: #171b22;
+              color: #d7dce4;
+              border: 1px solid #2a3140;
+              padding: 6px;
+            }
+            QPushButton {
+              background: #1e2631;
+              border: 1px solid #31405a;
+              padding: 6px 10px;
+              border-radius: 8px;
+              color: #d7dce4;
+            }
+            QPushButton:hover { background: #26344a; }
+            QPushButton:pressed { background: #1a2433; }
+
+            QFrame#playlistCard {
+              background: #171b22;
+              border: 1px solid #2a3140;
+              border-radius: 12px;
+              padding: 10px;
+            }
+            QLineEdit, QComboBox {
+              background: #11151c;
+              border: 1px solid #2a3140;
+              border-radius: 8px;
+              padding: 6px 8px;
+              color: #d7dce4;
+            }
+            QLineEdit:focus, QComboBox:focus {
+              border: 1px solid #6c8bff;
+            }
+            """
+        )
+
+
+def main() -> int:
+    app = QtWidgets.QApplication(sys.argv)
+    app.setApplicationName("ytpl-sync")
+    app.setOrganizationName("ytpl-sync")
+    app.setWindowIcon(load_app_icon())
+    app.setQuitOnLastWindowClosed(False)
+
+    # Avoid Qt warnings when a font with invalid point size is inherited from the environment.
+    f = app.font()
+    if f.pointSize() <= 0:
+        f.setPointSize(10)
+        app.setFont(f)
+
+    w = MainWindow()
+    if w.should_start_minimized_to_tray():
+        w.hide()
+    else:
+        w.show()
+    return app.exec()
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())

src/app/gui/pages/__init__.py

@@ -0,0 +1,2 @@
+from __future__ import annotations
+

src/app/gui/pages/about.py

@@ -0,0 +1,112 @@
+from __future__ import annotations
+
+from PySide6 import QtCore, QtGui, QtWidgets
+
+from ...core.utils.version import get_app_version
+
+
+class AboutPage(QtWidgets.QWidget):
+    REPO_URL = "https://github.com/darkzoul5/YoutubePlaylistSync"
+    ISSUES_URL = f"{REPO_URL}/issues"
+
+    def __init__(self, parent: QtWidgets.QWidget | None = None) -> None:
+        super().__init__(parent)
+        self.setObjectName("aboutPage")
+
+        layout = QtWidgets.QVBoxLayout(self)
+        layout.setContentsMargins(16, 16, 16, 16)
+        layout.setSpacing(14)
+
+        title = QtWidgets.QLabel("About")
+        title.setObjectName("pageTitle")
+        layout.addWidget(title)
+
+        for card in (
+            self._hero_card(),
+            self._project_card(),
+            self._suggestions_card(),
+        ):
+            layout.addWidget(card)
+        layout.addStretch(1)
+
+    def _card(self, title: str) -> tuple[QtWidgets.QFrame, QtWidgets.QVBoxLayout]:
+        card = QtWidgets.QFrame()
+        card.setObjectName("aboutCard")
+
+        layout = QtWidgets.QVBoxLayout(card)
+        layout.setContentsMargins(16, 16, 16, 16)
+        layout.setSpacing(10)
+        layout.addWidget(self._card_title(title))
+        return card, layout
+
+    def _card_title(self, text: str) -> QtWidgets.QLabel:
+        label = QtWidgets.QLabel(text)
+        label.setObjectName("cardTitle")
+        return label
+
+    def _muted_label(self, text: str) -> QtWidgets.QLabel:
+        label = QtWidgets.QLabel(text)
+        label.setWordWrap(True)
+        label.setProperty("muted", True)
+        return label
+
+    def _link_button(self, text: str, url: str) -> QtWidgets.QPushButton:
+        button = QtWidgets.QPushButton(text)
+        button.setCursor(QtCore.Qt.CursorShape.PointingHandCursor)
+        button.clicked.connect(lambda: QtGui.QDesktopServices.openUrl(QtCore.QUrl(url)))
+        return button
+
+    def _action_row(self, text: str, url: str) -> QtWidgets.QWidget:
+        row = QtWidgets.QWidget()
+        layout = QtWidgets.QHBoxLayout(row)
+        layout.setContentsMargins(0, 0, 0, 0)
+        layout.setSpacing(10)
+        layout.addWidget(self._link_button(text, url))
+        layout.addStretch(1)
+        return row
+
+    def _hero_card(self) -> QtWidgets.QFrame:
+        card, layout = self._card("About this project")
+        layout.insertWidget(
+            1,
+            self._muted_label(
+                "ytpl-sync is a desktop app for keeping local copies of YouTube playlists in sync."
+            ),
+        )
+        layout.insertWidget(2, self._muted_label("This is a student project."))
+        return card
+
+    def _project_card(self) -> QtWidgets.QFrame:
+        card, layout = self._card("Project")
+
+        form = QtWidgets.QFormLayout()
+        form.setLabelAlignment(QtCore.Qt.AlignmentFlag.AlignLeft)
+        form.setFormAlignment(
+            QtCore.Qt.AlignmentFlag.AlignTop | QtCore.Qt.AlignmentFlag.AlignLeft
+        )
+        form.setHorizontalSpacing(14)
+        form.setVerticalSpacing(10)
+
+        version_text = get_app_version()
+        version = f"v{version_text}" if version_text != "dev" else version_text
+        rows = [
+            ("Author", self._muted_label("Dark_Zoul")),
+            ("Version", self._muted_label(version)),
+            ("Repository", self._action_row("Open", self.REPO_URL)),
+            ("Issues", self._action_row("Open", self.ISSUES_URL)),
+        ]
+        for label, widget in rows:
+            form.addRow(label, widget)
+
+        layout.addLayout(form)
+        return card
+
+    def _suggestions_card(self) -> QtWidgets.QFrame:
+        card, layout = self._card("Suggestions")
+        layout.addWidget(
+            self._muted_label(
+                "• Keep the app updated regularly so that YouTube extraction stays reliable."
+            )
+        )
+        layout.addStretch(1)
+        return card

src/app/gui/pages/logs.py

@@ -0,0 +1,44 @@
+from __future__ import annotations
+
+import json
+
+from PySide6 import QtWidgets
+
+from ..smooth_scroll import enable_smooth_scrolling
+
+
+class LogsPage(QtWidgets.QWidget):
+    def __init__(self, parent: QtWidgets.QWidget | None = None) -> None:
+        super().__init__(parent)
+        self.setObjectName("logsPage")
+        layout = QtWidgets.QVBoxLayout(self)
+        title = QtWidgets.QLabel("Logs")
+        title.setObjectName("pageTitle")
+
+        top = QtWidgets.QHBoxLayout()
+        top.addWidget(title)
+        top.addStretch(1)
+        clear_btn = QtWidgets.QPushButton("Clear")
+        clear_btn.clicked.connect(self._clear)
+        top.addWidget(clear_btn)
+        layout.addLayout(top)
+
+        self._text = QtWidgets.QPlainTextEdit()
+        self._text.setReadOnly(True)
+        enable_smooth_scrolling(self._text)
+        layout.addWidget(self._text, 1)
+
+    def _clear(self) -> None:
+        self._text.clear()
+
+    def on_event(self, name: str, payload: dict) -> None:
+        # Avoid flooding the UI with high-frequency progress updates.
+        if name == "DownloadProgress":
+            return
+        # Keep this lightweight: append a single-line JSON entry.
+        try:
+            line = json.dumps({"event": name, **payload}, ensure_ascii=False)
+        except Exception:
+            line = f"{name}: {payload}"
+        self._text.appendPlainText(line)
+        self._text.moveCursor(self._text.textCursor().End)

src/app/gui/pages/playlists.py

@@ -0,0 +1,650 @@
+from __future__ import annotations
+
+from dataclasses import dataclass
+from typing import Any
+from pathlib import Path
+
+from PySide6 import QtCore, QtGui, QtWidgets
+
+from ...config.settings import Settings
+from ...core.database.db import Database
+from ...core.utils.yt import extract_playlist_id
+from ..smooth_scroll import enable_smooth_scrolling
+from ..config_store import load_config, normalize_config, save_config
+
+
+@dataclass(frozen=True)
+class PlaylistRow:
+    name: str
+    url: str
+    download_mode: str
+    max_download_quality: str
+    save_path: str
+
+
+class PlaylistManagerPage(QtWidgets.QWidget):
+    cancel_requested = QtCore.Signal()
+    sync_one_requested = QtCore.Signal(int)
+    sync_all_requested = QtCore.Signal()
+    pause_requested = QtCore.Signal()
+    resume_requested = QtCore.Signal()
+
+    def __init__(
+        self,
+        settings: Settings,
+        *,
+        parent: QtWidgets.QWidget | None = None,
+    ) -> None:
+        super().__init__(parent)
+        self.setObjectName("playlistsPage")
+        self._settings = settings
+        self._config_path = getattr(settings, "path", None)
+        self._config: dict[str, Any] = {}
+        self._download_state_by_pid: dict[str, dict[str, Any]] = {}
+        self._suppress_autosave = False
+        self._autosave_timer = QtCore.QTimer(self)
+        self._autosave_timer.setSingleShot(True)
+        self._autosave_timer.setInterval(600)
+        self._autosave_timer.timeout.connect(self._autosave_now)
+
+        header = QtWidgets.QLabel("Playlists")
+        header.setObjectName("pageTitle")
+
+        self._list = QtWidgets.QListWidget()
+        self._list.setObjectName("playlistList")
+        # Selection-based UI is intentionally disabled; actions happen per-card.
+        self._list.setSelectionMode(QtWidgets.QAbstractItemView.SelectionMode.NoSelection)
+        self._list.setSpacing(8)
+        self._list.setUniformItemSizes(False)
+        self._list.setWordWrap(True)
+        self._list.setVerticalScrollMode(QtWidgets.QAbstractItemView.ScrollMode.ScrollPerPixel)
+        enable_smooth_scrolling(self._list)
+        self._list.setStyleSheet(
+            """
+            QListWidget#playlistList {
+              background: #0f1218;
+              border: none;
+            }
+            QListWidget#playlistList::viewport {
+              background: #0f1218;
+            }
+            QListWidget#playlistList::item {
+              background: transparent;
+            }
+            """
+        )
+
+        self._add_btn = QtWidgets.QPushButton("Add")
+        self._add_btn.clicked.connect(self._add_playlist)
+        self._save_btn = QtWidgets.QPushButton("Save config")
+        self._save_btn.clicked.connect(self._save_config)
+
+        self._sync_all_btn = QtWidgets.QPushButton("Sync all")
+        self._sync_all_btn.clicked.connect(self.sync_all_requested.emit)
+
+        self._cancel_btn = QtWidgets.QPushButton("Cancel all")
+        self._cancel_btn.setEnabled(False)
+        self._cancel_btn.clicked.connect(self._cancel_sync)
+
+        self._refresh_btn = QtWidgets.QPushButton("Reload config")
+        self._refresh_btn.clicked.connect(self.reload_from_config)
+
+        self._status = QtWidgets.QLabel("")
+        self._status.setWordWrap(True)
+        self._sync_state = QtWidgets.QLabel("")
+        self._sync_state.setWordWrap(True)
+        self._sync_state.setStyleSheet("color: #9fb0c6;")
+
+        top = QtWidgets.QHBoxLayout()
+        top.addWidget(header)
+        top.addStretch(1)
+        top.addWidget(self._add_btn)
+        top.addWidget(self._save_btn)
+        top.addWidget(self._sync_all_btn)
+        top.addWidget(self._cancel_btn)
+        top.addWidget(self._refresh_btn)
+
+        layout = QtWidgets.QVBoxLayout(self)
+        layout.addLayout(top)
+        layout.addWidget(self._list, 1)
+        layout.addWidget(self._sync_state)
+        layout.addWidget(self._status)
+
+        self.reload_from_config()
+
+    def _rows_from_settings(self) -> list[PlaylistRow]:
+        rows: list[PlaylistRow] = []
+        for idx, pl in enumerate(self._settings.playlists, start=1):
+            name = str(pl.get("name") or f"Playlist {idx}")
+            rows.append(
+                PlaylistRow(
+                    name=name,
+                    url=str(pl.get("url") or ""),
+                    download_mode=str(pl.get("download_mode") or ""),
+                    max_download_quality=str(pl.get("max_download_quality") or ""),
+                    save_path=str(pl.get("save_path") or ""),
+                )
+            )
+        return rows
+
+    @QtCore.Slot()
+    def reload_from_config(self) -> None:
+        try:
+            self._suppress_autosave = True
+            self._settings = Settings()
+            self._config_path = getattr(self._settings, "path", None)
+            if self._config_path is None:
+                raise RuntimeError("Config path not available")
+            self._config = normalize_config(load_config(self._config_path).data)
+            rows = self._rows_from_settings()
+        except Exception as exc:
+            self._status.setText(f"Failed to load config: {exc}")
+            return
+        finally:
+            self._suppress_autosave = False
+
+        # Optional DB metadata (last_sync). If DB is missing/corrupt, keep UI usable.
+        last_sync_by_id: dict[str, str] = {}
+        try:
+            db = Database(Path("db/app.db").resolve())
+            for r in rows:
+                pid = extract_playlist_id(r.url) or r.url
+                ls = db.get_playlist_last_sync(pid)
+                if ls:
+                    last_sync_by_id[pid] = str(ls)
+        except Exception:
+            last_sync_by_id = {}
+
+        self._list.clear()
+        for idx, r in enumerate(rows):
+            pid = extract_playlist_id(r.url) or r.url
+            widget = _PlaylistCard(r, index=idx, last_sync=last_sync_by_id.get(pid))
+            widget.sync_clicked.connect(self.sync_one_requested.emit)
+            widget.remove_clicked.connect(self._remove_at_index)
+            widget.cancel_clicked.connect(lambda _pid: self._cancel_sync())
+            widget.pause_changed.connect(self._on_pause_changed)
+            widget.changed.connect(self._schedule_autosave)
+            item = QtWidgets.QListWidgetItem()
+            item.setSizeHint(widget.sizeHint())
+            self._list.addItem(item)
+            self._list.setItemWidget(item, widget)
+
+        cfg_path = getattr(self._settings, "path", None)
+        self._status.setText(f"Loaded {len(rows)} playlists from {cfg_path}.")
+
+    @QtCore.Slot()
+    def _cancel_sync(self) -> None:
+        # Actual cancellation is handled by MainWindow; this is UI intent.
+        self._status.setText("Cancelling…")
+        self.cancel_requested.emit()
+
+    def set_running(self, running: bool) -> None:
+        self._sync_all_btn.setEnabled(not running)
+        self._cancel_btn.setEnabled(running)
+        self._save_btn.setEnabled(not running)
+        self._add_btn.setEnabled(not running)
+        self._refresh_btn.setEnabled(not running)
+        # Keep the list enabled so per-card Pause/Cancel remains clickable.
+        self._list.setEnabled(True)
+        # But freeze editing while a sync is running to avoid racey config edits.
+        for i in range(self._list.count()):
+            item = self._list.item(i)
+            w = self._list.itemWidget(item)
+            if isinstance(w, _PlaylistCard):
+                w.set_editing_enabled(not running)
+
+    @QtCore.Slot()
+    def _add_playlist(self) -> None:
+        r = PlaylistRow(
+            name="New Playlist",
+            url="https://www.youtube.com/playlist?list=",
+            download_mode="video",
+            max_download_quality="1080p",
+            save_path="./downloads",
+        )
+        widget = _PlaylistCard(r, index=self._list.count())
+        widget.sync_clicked.connect(self.sync_one_requested.emit)
+        widget.remove_clicked.connect(self._remove_at_index)
+        widget.cancel_clicked.connect(lambda _pid: self._cancel_sync())
+        widget.pause_changed.connect(self._on_pause_changed)
+        widget.changed.connect(self._schedule_autosave)
+        item = QtWidgets.QListWidgetItem()
+        item.setSizeHint(widget.sizeHint())
+        self._list.addItem(item)
+        self._list.setItemWidget(item, widget)
+        self._schedule_autosave()
+
+    @QtCore.Slot()
+    def _remove_at_index(self, index: int) -> None:
+        if index < 0 or index >= self._list.count():
+            return
+        self._list.takeItem(index)
+        self._reindex_cards()
+        self._schedule_autosave()
+
+    @QtCore.Slot(bool)
+    def _on_pause_changed(self, paused: bool) -> None:
+        if paused:
+            self.pause_requested.emit()
+            self._sync_state.setText("Paused")
+        else:
+            self.resume_requested.emit()
+            self._sync_state.setText("Resumed")
+
+    def _table_to_playlists(self) -> list[dict[str, Any]]:
+        playlists: list[dict[str, Any]] = []
+        for i in range(self._list.count()):
+            item = self._list.item(i)
+            w = self._list.itemWidget(item)
+            if not isinstance(w, _PlaylistCard):
+                continue
+            pl = w.to_dict()
+            playlists.append(pl)
+        return playlists
+
+    @QtCore.Slot()
+    def _save_config(self) -> None:
+        if self._config_path is None:
+            self._status.setText("No config path loaded.")
+            return
+        try:
+            if not self._validate_all(show_status=True):
+                return
+            data = dict(self._config or {})
+            data["playlists"] = self._table_to_playlists()
+            save_config(self._config_path, data)
+            self._status.setText(f"Saved {len(data['playlists'])} playlists to {self._config_path}.")
+            # Reload settings to reflect merged defaults
+            self.reload_from_config()
+        except Exception as exc:
+            self._status.setText(f"Failed to save config: {exc}")
+
+    def _reindex_cards(self) -> None:
+        for i in range(self._list.count()):
+            item = self._list.item(i)
+            w = self._list.itemWidget(item)
+            if isinstance(w, _PlaylistCard):
+                w.set_index(i)
+
+    def _validate_all(self, *, show_status: bool) -> bool:
+        ok = True
+        for i in range(self._list.count()):
+            item = self._list.item(i)
+            w = self._list.itemWidget(item)
+            if isinstance(w, _PlaylistCard):
+                errs = w.validate()
+                w.set_status("; ".join(errs) if errs else "")
+                if errs:
+                    ok = False
+        if not ok and show_status:
+            self._status.setText("Fix invalid playlists before saving/syncing.")
+        return ok
+
+    @QtCore.Slot()
+    def _schedule_autosave(self) -> None:
+        if self._suppress_autosave:
+            return
+        if not self.isEnabled():
+            return
+        self._autosave_timer.start()
+
+    @QtCore.Slot()
+    def _autosave_now(self) -> None:
+        if self._config_path is None:
+            return
+        if self._suppress_autosave:
+            return
+        if not self._validate_all(show_status=False):
+            # Don't autosave invalid configs; user sees inline errors.
+            return
+        try:
+            data = dict(self._config or {})
+            data["playlists"] = self._table_to_playlists()
+            save_config(self._config_path, data)
+            self._status.setText(f"Autosaved to {self._config_path}.")
+        except Exception as exc:
+            self._status.setText(f"Autosave failed: {exc}")
+
+    def on_event(self, name: str, payload: dict) -> None:
+        if name == "SyncStarted":
+            pid = payload.get("playlist_id")
+            total = payload.get("actions_total")
+            self._sync_state.setText(f"Sync started: {pid} ({total} actions)")
+            self._set_card_status(str(pid or ""), "running")
+            self._set_active_card(str(pid or ""), running=True, paused=False)
+        elif name == "SyncSummary":
+            pid = payload.get("playlist_id")
+            dur = payload.get("duration_s")
+            counts = payload.get("counts")
+            self._sync_state.setText(f"Sync summary: {pid} in {dur}s counts={counts}")
+            self._set_card_status(str(pid or ""), f"done in {dur}s")
+            ls = payload.get("last_sync")
+            if ls:
+                self._set_card_last_sync(str(pid or ""), str(ls))
+        elif name == "SyncFinished":
+            pid = payload.get("playlist_id")
+            self._sync_state.setText(f"Sync finished: {pid}")
+            self._set_card_status(str(pid or ""), "finished")
+            self._set_active_card(str(pid or ""), running=False, paused=False)
+            self.set_running(False)
+        elif name == "SyncError":
+            self._sync_state.setText(f"Sync error: {payload.get('error')}")
+            self.set_running(False)
+            # Ensure any card in "pause" mode returns to Sync.
+            pid = str(payload.get("playlist_id") or "")
+            if pid:
+                self._set_active_card(pid, running=False, paused=False)
+        elif name == "DownloadStarted":
+            pid = str(payload.get("playlist_id") or "")
+            vid = str(payload.get("video_id") or "")
+            if not pid:
+                return
+            self._download_state_by_pid[pid] = {"video_id": vid, "progress": 0.0, "status": "started"}
+            self._set_card_progress(pid, 0.0)
+            self._set_card_status(pid, f"downloading {vid}".strip())
+        elif name == "DownloadProgress":
+            pid = str(payload.get("playlist_id") or "")
+            vid = str(payload.get("video_id") or "")
+            prog = payload.get("progress")
+            if not pid:
+                return
+            if isinstance(prog, (int, float)):
+                p = float(prog)
+                self._download_state_by_pid.setdefault(pid, {})["progress"] = p
+                if vid:
+                    self._download_state_by_pid[pid]["video_id"] = vid
+                self._download_state_by_pid[pid]["status"] = str(payload.get("status") or "downloading")
+                self._set_card_progress(pid, p)
+                pct = int(round(max(0.0, min(1.0, p)) * 100))
+                st = str(payload.get("status") or "downloading")
+                tail = f"{vid} {pct}%" if vid else f"{pct}%"
+                self._set_card_status(pid, f"{st} {tail}".strip())
+        elif name == "DownloadCompleted":
+            pid = str(payload.get("playlist_id") or "")
+            if pid:
+                vid = str(payload.get("video_id") or self._download_state_by_pid.get(pid, {}).get("video_id") or "")
+                self._set_card_progress(pid, 1.0)
+                self._download_state_by_pid.pop(pid, None)
+                self._set_card_status(pid, f"completed {vid}".strip())
+        elif name == "DownloadFailed":
+            pid = str(payload.get("playlist_id") or "")
+            if not pid:
+                return
+            vid = str(payload.get("video_id") or self._download_state_by_pid.get(pid, {}).get("video_id") or "")
+            err = str(payload.get("error") or "").strip()
+            self._download_state_by_pid.pop(pid, None)
+            self._set_card_status(pid, f"failed {vid}: {err}" if err else f"failed {vid}".strip())
+        elif name == "SyncPaused":
+            pid = str(payload.get("playlist_id") or "")
+            if not pid:
+                return
+            self._set_card_status(pid, str(payload.get("reason") or "paused"))
+            self._set_active_card(pid, running=True, paused=True)
+
+    def _set_card_progress(self, playlist_id: str, progress: float) -> None:
+        for i in range(self._list.count()):
+            item = self._list.item(i)
+            w = self._list.itemWidget(item)
+            if isinstance(w, _PlaylistCard) and w.playlist_id() == playlist_id:
+                w.set_progress(progress)
+
+    def _set_card_status(self, playlist_id: str, text: str) -> None:
+        for i in range(self._list.count()):
+            item = self._list.item(i)
+            w = self._list.itemWidget(item)
+            if isinstance(w, _PlaylistCard):
+                if w.playlist_id() == playlist_id:
+                    w.set_status(text)
+
+    def _set_card_last_sync(self, playlist_id: str, last_sync: str) -> None:
+        for i in range(self._list.count()):
+            item = self._list.item(i)
+            w = self._list.itemWidget(item)
+            if isinstance(w, _PlaylistCard) and w.playlist_id() == playlist_id:
+                w.set_last_sync(last_sync)
+
+    def _set_active_card(self, playlist_id: str, *, running: bool, paused: bool) -> None:
+        for i in range(self._list.count()):
+            item = self._list.item(i)
+            w = self._list.itemWidget(item)
+            if not isinstance(w, _PlaylistCard):
+                continue
+            is_active = w.playlist_id() == playlist_id
+            w.set_active(is_active and running)
+            if is_active:
+                w.set_paused(paused)
+
+
+class _PlaylistCard(QtWidgets.QFrame):
+    sync_clicked = QtCore.Signal(int)
+    remove_clicked = QtCore.Signal(int)
+    cancel_clicked = QtCore.Signal(str)
+    pause_changed = QtCore.Signal(bool)
+    changed = QtCore.Signal()
+
+    def __init__(self, row: PlaylistRow, *, index: int, last_sync: str | None = None, parent: QtWidgets.QWidget | None = None) -> None:
+        super().__init__(parent)
+        self.setFrameShape(QtWidgets.QFrame.Shape.StyledPanel)
+        self.setObjectName("playlistCard")
+        self.setAttribute(QtCore.Qt.WidgetAttribute.WA_StyledBackground, True)
+        self.setStyleSheet(
+            """
+            QFrame#playlistCard {
+              background: #171b22;
+              border: 1px solid #2a3140;
+              border-radius: 12px;
+            }
+            """
+        )
+        self._index = index
+        self._active = False
+        self._paused = False
+
+        self._name_value = row.name
+        self._name_label = QtWidgets.QLabel(self._name_value or "Playlist")
+        self._name_label.setStyleSheet("font-weight: 600; font-size: 14px;")
+
+        self._name_edit = QtWidgets.QLineEdit(self._name_value)
+        self._name_edit.setMinimumHeight(32)
+        self._name_edit.editingFinished.connect(self._finish_name_edit)
+        self._name_stack = QtWidgets.QStackedWidget()
+        self._name_stack.addWidget(self._name_label)
+        self._name_stack.addWidget(self._name_edit)
+        self._name_stack.setCurrentIndex(0)
+
+        self._url = QtWidgets.QLineEdit(row.url)
+
+        self._mode = QtWidgets.QComboBox()
+        self._mode.addItems(["video", "audio", "both"])
+        self._mode.setCurrentText(row.download_mode or "video")
+
+        self._quality = QtWidgets.QComboBox()
+        self._quality.addItems(["best", "2160p", "1440p", "1080p", "720p", "480p", "360p"])
+        self._quality.setEditable(False)
+        self._quality.setCurrentText(row.max_download_quality or "1080p")
+
+        self._save_path = QtWidgets.QLineEdit(row.save_path)
+
+        for w in (self._url, self._mode, self._quality, self._save_path):
+            w.setMinimumHeight(32)
+        self._url.editingFinished.connect(self.changed.emit)
+        self._save_path.editingFinished.connect(self.changed.emit)
+        self._mode.currentIndexChanged.connect(lambda _i: self.changed.emit())
+        self._quality.currentIndexChanged.connect(lambda _i: self.changed.emit())
+
+        self._status = QtWidgets.QLabel("")
+        self._status.setStyleSheet("color: #9fb0c6;")
+        self._meta = QtWidgets.QLabel(f"Last sync: {last_sync or 'never'}")
+        self._meta.setStyleSheet("color: #7f8aa3;")
+        self._progress = QtWidgets.QProgressBar()
+        self._progress.setRange(0, 100)
+        self._progress.setValue(0)
+        self._progress.setTextVisible(False)
+        self._progress.setFixedHeight(6)
+        self._sync_btn = QtWidgets.QPushButton("Sync")
+        self._sync_btn.clicked.connect(self._on_sync_or_pause_clicked)
+
+        self._edit_name_btn = QtWidgets.QToolButton()
+        self._edit_name_btn.setAutoRaise(True)
+        self._edit_name_btn.setCursor(QtCore.Qt.CursorShape.PointingHandCursor)
+        self._edit_name_btn.setIconSize(QtCore.QSize(16, 16))
+        self._edit_name_btn.setFixedSize(28, 28)
+        icon = QtGui.QIcon.fromTheme("document-edit")
+        if not icon.isNull():
+            self._edit_name_btn.setIcon(icon)
+        else:
+            self._edit_name_btn.setText("✎")
+        self._edit_name_btn.clicked.connect(self._toggle_name_edit)
+
+        self._remove_btn = QtWidgets.QToolButton()
+        self._remove_btn.setAutoRaise(True)
+        self._remove_btn.setCursor(QtCore.Qt.CursorShape.PointingHandCursor)
+        self._remove_btn.setIconSize(QtCore.QSize(16, 16))
+        self._remove_btn.setFixedSize(28, 28)
+        remove_icon = QtGui.QIcon.fromTheme("edit-delete")
+        if not remove_icon.isNull():
+            self._remove_btn.setIcon(remove_icon)
+        else:
+            self._remove_btn.setText("X")
+        self._remove_btn.setToolTip("Remove playlist")
+        self._remove_btn.clicked.connect(lambda: self.remove_clicked.emit(self._index))
+
+        self._cancel_btn = QtWidgets.QToolButton()
+        self._cancel_btn.setAutoRaise(True)
+        self._cancel_btn.setCursor(QtCore.Qt.CursorShape.PointingHandCursor)
+        self._cancel_btn.setIconSize(QtCore.QSize(16, 16))
+        self._cancel_btn.setFixedSize(28, 28)
+        stop_icon = QtGui.QIcon.fromTheme("process-stop")
+        if not stop_icon.isNull():
+            self._cancel_btn.setIcon(stop_icon)
+        else:
+            self._cancel_btn.setText("■")
+        self._cancel_btn.setToolTip("Cancel this playlist sync")
+        self._cancel_btn.setEnabled(False)
+        self._cancel_btn.clicked.connect(lambda: self.cancel_clicked.emit(self.playlist_id()))
+
+        header = QtWidgets.QHBoxLayout()
+        header.addWidget(self._name_stack, 0)
+        header.addWidget(self._edit_name_btn, 0)
+        header.addWidget(self._remove_btn, 0)
+        header.addWidget(self._cancel_btn, 0)
+        header.addStretch(1)
+        header.addWidget(self._sync_btn)
+
+        form = QtWidgets.QFormLayout()
+        form.setLabelAlignment(QtCore.Qt.AlignmentFlag.AlignLeft)
+        form.setFormAlignment(QtCore.Qt.AlignmentFlag.AlignTop)
+        form.setVerticalSpacing(10)
+        form.setHorizontalSpacing(12)
+        form.addRow("URL", self._url)
+        form.addRow("Mode", self._mode)
+        form.addRow("Max Quality", self._quality)
+        form.addRow("Save Path", self._save_path)
+
+        outer = QtWidgets.QVBoxLayout()
+        outer.addLayout(header)
+        outer.addLayout(form)
+        outer.addWidget(self._meta)
+        outer.addWidget(self._progress)
+        outer.addWidget(self._status)
+        self.setLayout(outer)
+
+        # Give the card a bit more breathing room so controls don't feel cramped.
+        self.setMinimumHeight(self.sizeHint().height() + 16)
+
+    def to_dict(self) -> dict[str, Any]:
+        name = self._name_value.strip()
+        url = self._url.text().strip()
+        mode = self._mode.currentText().strip() or "video"
+        max_q = self._quality.currentText().strip() or "1080p"
+        save_path = self._save_path.text().strip() or "./downloads"
+
+        pl: dict[str, Any] = {"url": url, "download_mode": mode, "max_download_quality": max_q, "save_path": save_path}
+        if name:
+            pl["name"] = name
+        return pl
+
+    def set_status(self, text: str) -> None:
+        self._status.setText(text)
+
+    def set_index(self, index: int) -> None:
+        self._index = index
+
+    def set_active(self, active: bool) -> None:
+        self._active = bool(active)
+        self._cancel_btn.setEnabled(self._active)
+        if not self._active:
+            self._paused = False
+            self._sync_btn.setText("Sync")
+        else:
+            self._sync_btn.setText("Resume" if self._paused else "Pause")
+
+    def set_paused(self, paused: bool) -> None:
+        self._paused = bool(paused)
+        if self._active:
+            self._sync_btn.setText("Resume" if self._paused else "Pause")
+
+    def set_editing_enabled(self, enabled: bool) -> None:
+        # Editing controls only (Sync/Pause/Cancel must remain usable).
+        self._url.setEnabled(enabled)
+        self._mode.setEnabled(enabled)
+        self._quality.setEnabled(enabled)
+        self._save_path.setEnabled(enabled)
+        self._edit_name_btn.setEnabled(enabled)
+        self._remove_btn.setEnabled(enabled)
+        # Explicitly keep runtime controls enabled even while editing is locked.
+        self._sync_btn.setEnabled(True)
+        self._cancel_btn.setEnabled(self._active)
+        if not enabled and self._name_stack.currentIndex() == 1:
+            # Force exit name edit if a sync starts mid-edit.
+            self._finish_name_edit()
+
+    def playlist_id(self) -> str:
+        url = (self._url.text() or "").strip()
+        return extract_playlist_id(url) or url
+
+    def set_progress(self, progress: float) -> None:
+        pct = max(0, min(100, int(round(progress * 100))))
+        self._progress.setValue(pct)
+
+    def set_last_sync(self, last_sync: str) -> None:
+        self._meta.setText(f"Last sync: {last_sync or 'never'}")
+
+    def validate(self) -> list[str]:
+        errs: list[str] = []
+        url = self._url.text().strip()
+        if not url or not (url.startswith("http://") or url.startswith("https://")):
+            errs.append("URL required")
+        mode = self._mode.currentText().strip()
+        if mode not in {"video", "audio", "both"}:
+            errs.append("invalid mode")
+        q = self._quality.currentText().strip().lower()
+        if not q.endswith("p") or not any(ch.isdigit() for ch in q):
+            errs.append("invalid quality")
+        sp = self._save_path.text().strip()
+        if not sp:
+            errs.append("save_path required")
+        return errs
+
+    def _toggle_name_edit(self) -> None:
+        self._name_edit.setText(self._name_value)
+        self._name_stack.setCurrentIndex(1)
+        self._edit_name_btn.setVisible(False)
+        self._name_edit.setFocus()
+        self._name_edit.selectAll()
+
+    def _finish_name_edit(self) -> None:
+        new_name = self._name_edit.text().strip()
+        self._name_value = new_name
+        self._name_label.setText(new_name or "Playlist")
+        self._name_stack.setCurrentIndex(0)
+        self._edit_name_btn.setVisible(True)
+        self.changed.emit()
+
+    def _on_sync_or_pause_clicked(self) -> None:
+        if not self._active:
+            self.sync_clicked.emit(self._index)
+            return
+        self._paused = not self._paused
+        self._sync_btn.setText("Resume" if self._paused else "Pause")
+        self.pause_changed.emit(self._paused)

src/app/gui/pages/queue.py

@@ -0,0 +1,215 @@
+from __future__ import annotations
+
+from PySide6 import QtCore, QtWidgets
+
+from ..smooth_scroll import enable_smooth_scrolling
+
+
+class QueuePage(QtWidgets.QWidget):
+    cancel_sync_requested = QtCore.Signal()
+
+    def __init__(self, parent: QtWidgets.QWidget | None = None) -> None:
+        super().__init__(parent)
+        self.setObjectName("queuePage")
+        # Map (playlist_id, video_id) to a stable item; its `.row()` tracks sorting moves.
+        self._rows_by_key: dict[tuple[str, str], QtWidgets.QTableWidgetItem] = {}
+        self._pending_by_key: dict[tuple[str, str], dict] = {}
+        self._playlist_labels: dict[str, str] = {}
+
+        self._flush_timer = QtCore.QTimer(self)
+        self._flush_timer.setInterval(150)
+        self._flush_timer.timeout.connect(self._flush_pending)
+        self._flush_timer.start()
+
+        layout = QtWidgets.QVBoxLayout(self)
+        title = QtWidgets.QLabel("Queue")
+        title.setObjectName("pageTitle")
+
+        top = QtWidgets.QHBoxLayout()
+        top.addWidget(title)
+        top.addStretch(1)
+        clear_btn = QtWidgets.QPushButton("Clear completed")
+        clear_btn.clicked.connect(self._clear_completed)
+        cancel_btn = QtWidgets.QPushButton("Cancel all")
+        cancel_btn.clicked.connect(self.cancel_sync_requested.emit)
+        top.addWidget(clear_btn)
+        top.addWidget(cancel_btn)
+        layout.addLayout(top)
+
+        self._table = QtWidgets.QTableWidget(0, 7)
+        self._table.setHorizontalHeaderLabels(["Playlist", "Video ID", "Status", "Progress", "Speed", "ETA", "Target/File"])
+        self._table.horizontalHeader().setStretchLastSection(True)
+        self._table.setEditTriggers(QtWidgets.QAbstractItemView.EditTrigger.NoEditTriggers)
+        self._table.setSelectionBehavior(QtWidgets.QAbstractItemView.SelectionBehavior.SelectRows)
+        self._table.setSelectionMode(QtWidgets.QAbstractItemView.SelectionMode.SingleSelection)
+        self._table.setSortingEnabled(True)
+        self._table.setVerticalScrollMode(QtWidgets.QAbstractItemView.ScrollMode.ScrollPerPixel)
+        enable_smooth_scrolling(self._table)
+        layout.addWidget(self._table, 1)
+
+        self._hint = QtWidgets.QLabel("Waiting for downloads…")
+        layout.addWidget(self._hint)
+
+    def on_event(self, name: str, payload: dict) -> None:
+        if name not in {"DownloadStarted", "DownloadProgress", "DownloadCompleted", "DownloadFailed"}:
+            return
+        vid = str(payload.get("video_id") or "")
+        if not vid:
+            return
+        pid = str(payload.get("playlist_id") or "")
+        key = (pid, vid)
+
+        latest = dict(payload)
+        latest["_event"] = name
+        self._pending_by_key[key] = latest
+
+    def set_playlist_labels(self, labels: dict[str, str]) -> None:
+        self._playlist_labels = dict(labels)
+        # Update any existing rows to reflect new names.
+        for row in range(self._table.rowCount()):
+            pl_item = self._table.item(row, 0)
+            if pl_item is None:
+                continue
+            pid = pl_item.data(QtCore.Qt.ItemDataRole.UserRole)
+            if not pid:
+                continue
+            pl_item.setText(self._playlist_labels.get(str(pid), str(pid)))
+
+    def _ensure_row(self, key: tuple[str, str]) -> int:
+        vid_item = self._rows_by_key.get(key)
+        if vid_item is not None and vid_item.row() >= 0:
+            return int(vid_item.row())
+
+        pid, vid = key
+        row = self._table.rowCount()
+        self._table.insertRow(row)
+
+        label = self._playlist_labels.get(pid, pid)
+        pl_item = QtWidgets.QTableWidgetItem(label)
+        # Keep the real playlist_id even if the displayed label changes.
+        pl_item.setData(QtCore.Qt.ItemDataRole.UserRole, pid)
+        pl_item.setToolTip(pid)
+        self._table.setItem(row, 0, pl_item)
+
+        vid_item = QtWidgets.QTableWidgetItem(vid)
+        self._table.setItem(row, 1, vid_item)
+
+        self._table.setItem(row, 2, QtWidgets.QTableWidgetItem("queued"))
+        self._table.setItem(row, 3, QtWidgets.QTableWidgetItem(""))
+        self._table.setItem(row, 4, QtWidgets.QTableWidgetItem(""))
+        self._table.setItem(row, 5, QtWidgets.QTableWidgetItem(""))
+        self._table.setItem(row, 6, QtWidgets.QTableWidgetItem(""))
+        self._rows_by_key[key] = vid_item
+        return row
+
+    def _ensure_item(self, row: int, col: int, default: str = "") -> QtWidgets.QTableWidgetItem:
+        item = self._table.item(row, col)
+        if item is None:
+            item = QtWidgets.QTableWidgetItem(default)
+            self._table.setItem(row, col, item)
+        return item
+
+    @QtCore.Slot()
+    def _flush_pending(self) -> None:
+        if not self._pending_by_key:
+            return
+
+        pending = dict(self._pending_by_key)
+        self._pending_by_key.clear()
+
+        sorting_was_enabled = self._table.isSortingEnabled()
+        if sorting_was_enabled:
+            self._table.setSortingEnabled(False)
+
+        try:
+            for key, payload in pending.items():
+                name = str(payload.pop("_event", ""))
+                row = self._ensure_row(key)
+
+                status_item = self._ensure_item(row, 2, "queued")
+                progress_item = self._ensure_item(row, 3, "")
+                speed_item = self._ensure_item(row, 4, "")
+                eta_item = self._ensure_item(row, 5, "")
+                target_item = self._ensure_item(row, 6, "")
+
+                if name == "DownloadStarted":
+                    status_item.setText("started")
+                    tgt = payload.get("target") or payload.get("filename") or ""
+                    if tgt:
+                        target_item.setText(str(tgt))
+                elif name == "DownloadProgress":
+                    status_item.setText(str(payload.get("status") or "downloading"))
+                    prog = payload.get("progress")
+                    if isinstance(prog, (int, float)):
+                        pct = max(0, min(100, int(round(prog * 100))))
+                        bar = self._table.cellWidget(row, 3)
+                        if bar is None:
+                            bar = QtWidgets.QProgressBar()
+                            bar.setRange(0, 100)
+                            bar.setTextVisible(True)
+                            self._table.setCellWidget(row, 3, bar)
+                        bar.setValue(pct)
+                    sp = payload.get("speed")
+                    if isinstance(sp, (int, float)) and sp > 0:
+                        speed_item.setText(f"{sp/1024/1024:.2f} MiB/s")
+                    et = payload.get("eta")
+                    if isinstance(et, (int, float)) and et >= 0:
+                        eta_item.setText(f"{int(et)}s")
+                    fn = payload.get("filename")
+                    if fn:
+                        target_item.setText(str(fn))
+                elif name == "DownloadCompleted":
+                    status_item.setText("completed")
+                    tgt = payload.get("target") or ""
+                    if tgt:
+                        target_item.setText(str(tgt))
+                    bar = self._table.cellWidget(row, 3)
+                    if bar is None:
+                        bar = QtWidgets.QProgressBar()
+                        bar.setRange(0, 100)
+                        bar.setTextVisible(True)
+                        self._table.setCellWidget(row, 3, bar)
+                    bar.setValue(100)
+                    speed_item.setText("")
+                    eta_item.setText("")
+                elif name == "DownloadFailed":
+                    status_item.setText("failed")
+                    self._table.removeCellWidget(row, 3)
+                    progress_item.setText("")
+                    speed_item.setText("")
+                    eta_item.setText("")
+                    err = payload.get("error")
+                    if err:
+                        target_item.setText(str(err))
+        finally:
+            if sorting_was_enabled:
+                self._table.setSortingEnabled(True)
+
+        self._hint.setText(f"{len(self._rows_by_key)} job(s) seen.")
+
+    def _clear_completed(self) -> None:
+        to_remove: list[tuple[int, tuple[str, str]]] = []
+        for key, vid_item in list(self._rows_by_key.items()):
+            row = int(vid_item.row())
+            if row < 0:
+                self._rows_by_key.pop(key, None)
+                continue
+            st = self._table.item(row, 2)
+            if st and st.text() == "completed":
+                to_remove.append((row, key))
+
+        for row, key in sorted(to_remove, key=lambda x: x[0], reverse=True):
+            self._table.removeRow(row)
+            self._rows_by_key.pop(key, None)
+
+        # Rebuild mapping since row indices/items may have shifted.
+        rebuilt: dict[tuple[str, str], QtWidgets.QTableWidgetItem] = {}
+        for r in range(self._table.rowCount()):
+            pl_item = self._table.item(r, 0)
+            v_item = self._table.item(r, 1)
+            if pl_item is None or v_item is None:
+                continue
+            pid = pl_item.data(QtCore.Qt.ItemDataRole.UserRole) or pl_item.text()
+            vid = v_item.text()
+            rebuilt[(str(pid), str(vid))] = v_item
+        self._rows_by_key = rebuilt

src/app/gui/pages/settings.py

@@ -0,0 +1,165 @@
+from __future__ import annotations
+
+from pathlib import Path
+from typing import Any
+
+from PySide6 import QtCore, QtWidgets
+
+from ..config_store import load_config, save_config
+
+
+class SettingsPage(QtWidgets.QWidget):
+    def __init__(self, parent: QtWidgets.QWidget | None = None) -> None:
+        super().__init__(parent)
+        self.setObjectName("settingsPage")
+        self._config_path: Path | None = None
+        self._config: dict[str, Any] = {}
+
+        layout = QtWidgets.QVBoxLayout(self)
+        title = QtWidgets.QLabel("Settings")
+        title.setObjectName("pageTitle")
+        layout.addWidget(title)
+
+        form = QtWidgets.QFormLayout()
+
+        self._ffmpeg_path = QtWidgets.QLineEdit()
+        self._ffmpeg_path.setPlaceholderText("./bin/ffmpeg.exe (Windows) or ./bin/ffmpeg (Linux)")
+        form.addRow("ffmpeg_path", self._ffmpeg_path)
+
+        self._max_parallel = QtWidgets.QSpinBox()
+        self._max_parallel.setRange(1, 64)
+        form.addRow("max_parallel_downloads", self._max_parallel)
+
+        self._retry_max = QtWidgets.QSpinBox()
+        self._retry_max.setRange(0, 20)
+        form.addRow("retry_max_retries", self._retry_max)
+
+        self._retry_delay = QtWidgets.QDoubleSpinBox()
+        self._retry_delay.setRange(0.0, 60.0)
+        self._retry_delay.setDecimals(2)
+        self._retry_delay.setSingleStep(0.25)
+        form.addRow("retry_delay_seconds", self._retry_delay)
+
+        self._download_delay = QtWidgets.QDoubleSpinBox()
+        self._download_delay.setRange(0.0, 600.0)
+        self._download_delay.setDecimals(2)
+        self._download_delay.setSingleStep(0.25)
+        form.addRow("delay_between_downloads_seconds", self._download_delay)
+
+        form_box = QtWidgets.QGroupBox("Global defaults")
+        form_box.setLayout(form)
+        layout.addWidget(form_box)
+
+        tray_form = QtWidgets.QFormLayout()
+        self._close_to_tray = QtWidgets.QCheckBox()
+        self._close_to_tray.setChecked(False)
+        tray_form.addRow("close_to_tray", self._close_to_tray)
+
+        self._minimize_to_tray = QtWidgets.QCheckBox()
+        self._minimize_to_tray.setChecked(False)
+        tray_form.addRow("minimize_to_tray", self._minimize_to_tray)
+
+        self._start_minimized_to_tray = QtWidgets.QCheckBox()
+        self._start_minimized_to_tray.setChecked(False)
+        tray_form.addRow("start_minimized_to_tray", self._start_minimized_to_tray)
+
+        tray_box = QtWidgets.QGroupBox("Tray behavior")
+        tray_box.setLayout(tray_form)
+        layout.addWidget(tray_box)
+
+        btns = QtWidgets.QHBoxLayout()
+        self._reload_btn = QtWidgets.QPushButton("Reload")
+        self._reload_btn.clicked.connect(self.reload_from_config)
+        self._save_btn = QtWidgets.QPushButton("Save")
+        self._save_btn.clicked.connect(self.save_to_config)
+        btns.addStretch(1)
+        btns.addWidget(self._reload_btn)
+        btns.addWidget(self._save_btn)
+        layout.addLayout(btns)
+
+        self._status = QtWidgets.QLabel("")
+        self._status.setWordWrap(True)
+        layout.addWidget(self._status)
+
+        self._suppress_autosave = False
+        self._autosave_timer = QtCore.QTimer(self)
+        self._autosave_timer.setSingleShot(True)
+        self._autosave_timer.setInterval(600)
+        self._autosave_timer.timeout.connect(self.save_to_config)
+
+        # Autosave on focus-out / change.
+        self._ffmpeg_path.editingFinished.connect(self._schedule_autosave)
+        self._max_parallel.valueChanged.connect(lambda _v: self._schedule_autosave())
+        self._retry_max.valueChanged.connect(lambda _v: self._schedule_autosave())
+        self._retry_delay.valueChanged.connect(lambda _v: self._schedule_autosave())
+        self._download_delay.valueChanged.connect(lambda _v: self._schedule_autosave())
+        self._close_to_tray.stateChanged.connect(lambda _v: self._schedule_autosave())
+        self._minimize_to_tray.stateChanged.connect(lambda _v: self._schedule_autosave())
+        self._start_minimized_to_tray.stateChanged.connect(lambda _v: self._schedule_autosave())
+
+    def set_config_path(self, path: Path) -> None:
+        self._config_path = path
+        self.reload_from_config()
+
+    @QtCore.Slot()
+    def reload_from_config(self) -> None:
+        if self._config_path is None:
+            self._status.setText("No config loaded yet.")
+            return
+        try:
+            self._suppress_autosave = True
+            cfg = load_config(self._config_path)
+            self._config = dict(cfg.data)
+
+            self._ffmpeg_path.setText(str(self._config.get("ffmpeg_path") or ""))
+            self._max_parallel.setValue(int(self._config.get("max_parallel_downloads") or 2))
+            self._retry_max.setValue(int(self._config.get("retry_max_retries") or 2))
+            self._retry_delay.setValue(float(self._config.get("retry_delay_seconds") or 1.5))
+            self._download_delay.setValue(float(self._config.get("delay_between_downloads_seconds") or 0.0))
+
+            ui = self._config.get("ui")
+            ui = ui if isinstance(ui, dict) else {}
+            tray = ui.get("tray")
+            tray = tray if isinstance(tray, dict) else {}
+            self._close_to_tray.setChecked(bool(tray.get("close_to_tray", False)))
+            self._minimize_to_tray.setChecked(bool(tray.get("minimize_to_tray", False)))
+            self._start_minimized_to_tray.setChecked(bool(tray.get("start_minimized_to_tray", False)))
+
+            self._status.setText(f"Loaded settings from {self._config_path}.")
+        except Exception as exc:
+            self._status.setText(f"Failed to load settings: {exc}")
+        finally:
+            self._suppress_autosave = False
+
+    def _schedule_autosave(self) -> None:
+        if self._suppress_autosave:
+            return
+        self._autosave_timer.start()
+
+    @QtCore.Slot()
+    def save_to_config(self) -> None:
+        if self._config_path is None:
+            self._status.setText("No config loaded yet.")
+            return
+        try:
+            data = dict(self._config or {})
+            data["ffmpeg_path"] = self._ffmpeg_path.text().strip() or data.get("ffmpeg_path")
+            data["max_parallel_downloads"] = int(self._max_parallel.value())
+            data["retry_max_retries"] = int(self._retry_max.value())
+            data["retry_delay_seconds"] = float(self._retry_delay.value())
+            data["delay_between_downloads_seconds"] = float(self._download_delay.value())
+
+            ui = data.get("ui")
+            ui = ui if isinstance(ui, dict) else {}
+            tray = ui.get("tray")
+            tray = tray if isinstance(tray, dict) else {}
+            tray["close_to_tray"] = bool(self._close_to_tray.isChecked())
+            tray["minimize_to_tray"] = bool(self._minimize_to_tray.isChecked())
+            tray["start_minimized_to_tray"] = bool(self._start_minimized_to_tray.isChecked())
+            ui["tray"] = tray
+            data["ui"] = ui
+
+            save_config(self._config_path, data)
+            self._status.setText(f"Saved settings to {self._config_path}.")
+        except Exception as exc:
+            self._status.setText(f"Failed to save settings: {exc}")

src/app/gui/runner.py

@@ -0,0 +1,74 @@
+from __future__ import annotations
+
+import asyncio
+import threading
+from dataclasses import dataclass
+from pathlib import Path
+from typing import Any, Dict
+
+from PySide6 import QtCore
+
+from ..core.database.db import Database
+from ..core.sync.executor import ActionExecutor
+from ..core.sync.service import SyncService
+from ..core.events.event_bus import EventBus
+
+
+@dataclass(frozen=True)
+class SyncRequest:
+    playlist_cfg: Dict[str, Any]
+    apply: bool = True
+    db_path: Path = Path("db/app.db")
+    cancel_flag: threading.Event | None = None
+    pause_flag: threading.Event | None = None
+
+
+class SyncRunner(QtCore.QObject):
+    """
+    Runs a sync in the background to keep the UI responsive.
+    """
+
+    finished = QtCore.Signal(bool, str)
+
+    def __init__(self, bus: EventBus, parent: QtCore.QObject | None = None) -> None:
+        super().__init__(parent)
+        self._bus = bus
+        self._req: SyncRequest | None = None
+
+    @QtCore.Slot(object)
+    def set_request(self, req: SyncRequest) -> None:
+        self._req = req
+
+    @QtCore.Slot()
+    def run_current(self) -> None:
+        if self._req is None:
+            self.finished.emit(False, "no request")
+            return
+        self.run(self._req)
+
+    @QtCore.Slot(object)
+    def run(self, req: SyncRequest) -> None:
+        try:
+            if req.cancel_flag is not None and req.cancel_flag.is_set():
+                self.finished.emit(False, "cancelled")
+                return
+
+            db = Database(req.db_path.resolve())
+            service = SyncService(db)
+            executor = ActionExecutor(db, concurrency=int(req.playlist_cfg.get("max_parallel_downloads", 2) or 2), event_bus=self._bus)
+
+            actions = service.sync_from_config(req.playlist_cfg)
+            if req.cancel_flag is not None and req.cancel_flag.is_set():
+                self.finished.emit(False, "cancelled")
+                return
+            if req.apply and actions:
+                cancel_check = req.cancel_flag.is_set if req.cancel_flag is not None else None
+                pause_check = req.pause_flag.is_set if req.pause_flag is not None else None
+                asyncio.run(executor.execute(actions, req.playlist_cfg, cancel_check=cancel_check, pause_check=pause_check))
+
+            if req.cancel_flag is not None and req.cancel_flag.is_set():
+                self.finished.emit(False, "cancelled")
+            else:
+                self.finished.emit(True, "done")
+        except Exception as exc:
+            self.finished.emit(False, str(exc))

src/app/gui/smooth_scroll.py

@@ -0,0 +1,60 @@
+from __future__ import annotations
+
+from PySide6 import QtCore, QtWidgets
+
+
+class _SmoothWheelFilter(QtCore.QObject):
+    def __init__(self, area: QtWidgets.QAbstractScrollArea, *, duration_ms: int = 140) -> None:
+        super().__init__(area)
+        self._area = area
+        self._duration_ms = max(60, int(duration_ms))
+        self._anim = QtCore.QPropertyAnimation(area.verticalScrollBar(), b"value", self)
+        self._anim.setEasingCurve(QtCore.QEasingCurve.Type.OutCubic)
+
+    def eventFilter(self, obj: QtCore.QObject, event: QtCore.QEvent) -> bool:  # noqa: N802
+        if event.type() != QtCore.QEvent.Type.Wheel:
+            return super().eventFilter(obj, event)
+
+        wheel = event  # type: ignore[assignment]
+        try:
+            angle_y = wheel.angleDelta().y()
+            pixel_y = wheel.pixelDelta().y()
+        except Exception:
+            return super().eventFilter(obj, event)
+
+        dy = pixel_y if pixel_y else angle_y
+        if dy == 0:
+            return True
+
+        sb = self._area.verticalScrollBar()
+        start = sb.value()
+
+        # Map a wheel "step" to a reasonable pixel delta; keep it snappy but not jarring.
+        base_step = 80
+        if pixel_y:
+            delta = -dy
+        else:
+            delta = int(round(-dy / 120.0 * base_step))
+
+        target = max(sb.minimum(), min(sb.maximum(), start + delta))
+        if target == start:
+            return True
+
+        self._anim.stop()
+        self._anim.setDuration(self._duration_ms)
+        self._anim.setStartValue(start)
+        self._anim.setEndValue(target)
+        self._anim.start()
+        return True
+
+
+def enable_smooth_scrolling(widget: QtWidgets.QAbstractScrollArea, *, duration_ms: int = 140) -> None:
+    """
+    Enables animated wheel scrolling for QAbstractScrollArea-derived widgets
+    (QListWidget, QTableWidget, QPlainTextEdit, etc.).
+    """
+    filt = _SmoothWheelFilter(widget, duration_ms=duration_ms)
+    widget.viewport().installEventFilter(filt)
+    # Keep a reference to avoid the filter being GC'd.
+    widget.setProperty("_smooth_wheel_filter", filt)
+

src/app/main.py

@@ -0,0 +1,57 @@
+"""
+Entry point for the backend (no GUI).
+
+For now, this verifies configuration + database setup and can run a one-off sync.
+Future iterations will wire up scheduler and a GUI.
+"""
+
+from __future__ import annotations
+
+import asyncio
+from pathlib import Path
+
+from .config.settings import Settings
+from .core.database.db import Database
+from .core.sync.service import SyncService
+from .core.sync.executor import ActionExecutor
+from .core.utils.yt import extract_playlist_id
+from .core.utils.deps import DependencyError
+
+
+def bootstrap(db_path: Path | None = None) -> None:
+    settings = Settings()
+    db = Database((db_path or Path("db/app.db")).resolve())
+    service = SyncService(db)
+    executor = ActionExecutor(db)
+
+    # Iterate configured playlists and compute actions (no execution yet)
+    for pl in settings.playlists:
+        try:
+            actions = service.sync_from_config(pl)
+            # Apply actions now
+            if actions:
+                print(f"Applying {len(actions)} actions for: {pl.get('url')}")
+                # Summarize before applying
+                counts = {}
+                for a in actions:
+                    counts[a.type] = counts.get(a.type, 0) + 1
+                summary = ", ".join(f"{k.name}:{v}" for k, v in counts.items())
+                print(f"Plan → {summary}")
+                # Execute
+                try:
+                    asyncio.run(executor.execute(actions, pl))
+                except DependencyError as e:
+                    print(f"ERROR: {e}")
+                    continue
+                # Post summary (no DB readback yet)
+                pid = extract_playlist_id(pl.get('url', '')) or pl.get('url', '')
+                db.set_playlist_last_sync(pid)
+                print("Applied actions.")
+            else:
+                print(f"No actions needed for: {pl.get('url')}")
+        except Exception as exc:  # keep bootstrap resilient during early dev
+            print(f"Failed to sync playlist {pl.get('url')}: {exc}")
+
+
+if __name__ == "__main__":
+    bootstrap()

src/cli.py

@@ -1,46 +0,0 @@
-import argparse
-import logging
-import subprocess
-from .config import ConfigLoader, is_docker
-from .manager import PlaylistManager
-
-
-def configure_logging(debug: bool):
-    level = logging.DEBUG if debug else logging.INFO
-    fmt = "%(asctime)s %(levelname)s: %(message)s" if debug else "%(levelname)s: %(message)s"
-    logging.basicConfig(level=level, format=fmt)
-
-
-def update_yt_dlp(yt_dlp_path: str, debug: bool = False):
-    logger = logging.getLogger(__name__)
-    try:
-        if debug:
-            subprocess.run([yt_dlp_path, "-U"], check=True)
-        else:
-            subprocess.run([yt_dlp_path, "-U"], check=True, stdout=subprocess.DEVNULL, stderr=subprocess.PIPE, text=True)
-        logger.info("yt-dlp is up to date.")
-    except subprocess.CalledProcessError:
-        logger.warning("Could not update yt-dlp: Internet unavailable or cannot reach update server")
-
-
-def main():
-    parser = argparse.ArgumentParser(prog="yt-playlist")
-    parser.add_argument("-c", "--config", default="yt-playlist-config.json", help="Path to config file")
-    parser.add_argument("-d", "--debug", action="store_true", help="Enable debug logging and show binary output")
-    parser.add_argument("-p", "--prune", dest="prune", action="store_true", help="Enable pruning: delete files not present in the playlist")
-    parser.add_argument("-y", "--yes", "--non-interactive", dest="yes", action="store_true", help="Run non-interactively (auto-confirm prompts, used with --prune)")
-    args = parser.parse_args()
-
-    configure_logging(args.debug)
-    logger = logging.getLogger(__name__)
-
-    cfg = ConfigLoader(args.config)
-    if not is_docker():
-        update_yt_dlp(cfg.yt_dlp_path, debug=args.debug)
-
-    manager = PlaylistManager(cfg, debug=args.debug)
-    # support non-interactive mode for CI
-    setattr(cfg, "non_interactive", bool(args.yes))
-    setattr(cfg, "prune", bool(args.prune))
-    logger.debug("Starting PlaylistManager with debug=%s", args.debug)
-    manager.run()

src/config.py

@@ -1,117 +0,0 @@
-import os
-import sys
-import json
-import shutil
-import platform
-from pathlib import Path
-
-
-def is_docker():
-    return os.path.exists("/.dockerenv") or os.getenv("RUNNING_IN_DOCKER") == "true"
-
-
-class ConfigLoader:
-    DEFAULT_CONFIG = {
-        "playlists": [
-            {
-                "url": "https://www.youtube.com/playlist?list=YOUR_PLAYLIST_ID_HERE",
-                "download_mode": "audio",
-                "max_video_quality": "1080p",
-                "save_path": "./downloads",
-                "archive": "archive.txt",
-            }
-        ],
-        "yt_dlp_path": "yt-dlp" if is_docker() else ("./bin/yt-dlp.exe" if platform.system() == "Windows" else "./bin/yt-dlp"),
-        "ffmpeg_path": "ffmpeg" if is_docker() else ("./bin/ffmpeg.exe" if platform.system() == "Windows" else "./bin/ffmpeg"),
-        "aria2c_path": "aria2c" if is_docker() else ("./bin/aria2c.exe" if platform.system() == "Windows" else "./bin/aria2c"),
-        "max_parallel_downloads": 10,
-        "aria2c_connections": 8,
-    }
-
-    def __init__(self, config_path=None):
-        config_dir = Path("./config")
-        config_dir.mkdir(parents=True, exist_ok=True)
-        if config_path is None:
-            config_path = config_dir / "yt-playlist-config.json"
-        else:
-            config_path = Path(config_path)
-            if not config_path.is_absolute():
-                config_path = config_dir / config_path
-        self.config_path = Path(config_path).resolve()
-        if not self.config_path.exists():
-            self._create_default_config()
-            print(
-                f"ℹ Default config created at '{self.config_path}'. Please edit it and rerun."
-            )
-            sys.exit(0)
-
-        with self.config_path.open("r", encoding="utf-8") as f:
-            self.data = json.load(f)
-
-        # Validate binaries
-        self._check_binary(self.yt_dlp_path, "yt-dlp")
-        self._check_binary(self.aria2c_path, "aria2c")
-        # Only require ffmpeg if download_mode is audio or both
-        if self.download_mode in ("audio", "both"):
-            self._check_binary(self.ffmpeg_path, "ffmpeg")
-
-    def _create_default_config(self):
-        with self.config_path.open("w", encoding="utf-8") as f:
-            json.dump(self.DEFAULT_CONFIG, f, indent=2)
-
-    def _check_binary(self, path_str, name):
-        if os.sep not in path_str and "/" not in path_str:
-            if shutil.which(path_str):
-                return
-            print(
-                f"⚠[ERROR] {name} not found in system PATH.\n"
-                f"  Configured path: '{path_str}'\n"
-                f"Please install or correct the path in yt-playlist-config.json ."
-            )
-            sys.exit(1)
-        else:
-            path = Path(path_str)
-            if not path.is_absolute():
-                script_dir = Path(__file__).resolve().parent.parent
-                path = (script_dir / path).resolve()
-            if path.is_file() or shutil.which(str(path)):
-                return
-            print(
-                f"⚠[ERROR] {name} not found.\n"
-                f"  Configured path: '{path_str}'\n"
-                f"  Resolved absolute path: '{path}'\n"
-                f"Please correct the yt-playlist-config.json path."
-            )
-            sys.exit(1)
-
-    @property
-    def playlists(self):
-        return self.data.get("playlists", [])
-
-    @property
-    def yt_dlp_path(self):
-        return self.data["yt_dlp_path"]
-
-    @property
-    def ffmpeg_path(self):
-        return self.data["ffmpeg_path"]
-
-    @property
-    def aria2c_path(self):
-        return self.data["aria2c_path"]
-
-    @property
-    def download_mode(self):
-        return self.data.get("download_mode", "audio")
-
-    @property
-    def max_video_quality(self):
-        return self.data.get("max_video_quality", "1080p")
-
-    @property
-    def max_parallel_downloads(self):
-        return self.data.get("max_parallel_downloads", 10)
-
-    @property
-    def aria2c_connections(self):
-        return self.data.get("aria2c_connections", 8)

src/downloader.py

@@ -1,390 +0,0 @@
-import json
-import shutil
-import subprocess
-import logging
-from pathlib import Path
-from urllib.parse import urlparse, parse_qs
-from concurrent.futures import ThreadPoolExecutor, as_completed
-
-
-class PlaylistDownloader:
-    illegal_chars = '<>:"/\\|?*'
-
-    def __init__(self, config, playlist: dict, index: int):
-        self.logger = logging.getLogger(__name__)
-        # allow caller to pass debug via playlist dict key or config extension later; default False
-        self.debug = bool(playlist.get("debug", False))
-
-        # If the manager (or config) defines debug, prefer that
-        if hasattr(config, "debug"):
-            self.debug = bool(config.debug)
-        # non-interactive mode for CI/automated runs
-        self.non_interactive = bool(getattr(config, "non_interactive", False))
-        # prune controls whether cleanup actually deletes files; default False
-        self.prune = bool(getattr(config, "prune", False))
-
-        self.url = playlist.get("url")
-        self.skip = False
-        if not self.url:
-            self.logger.error("Playlist #%d has invalid or empty URL: '%s' skipping", index + 1, self.url)
-            self.skip = True
-        else:
-            parsed = urlparse(self.url)
-            qs = parse_qs(parsed.query)
-            if "list" in qs and qs.get("list"):
-                self.skip = False
-            else:
-                if (
-                    "v" in qs
-                    or parsed.netloc.endswith("youtu.be")
-                    or parsed.path.startswith("/watch")
-                ):
-                    self.logger.warning("URL for playlist #%d looks like a video URL, not a playlist: '%s' — skipping", index + 1, self.url)
-                    self.skip = True
-                else:
-                    self.logger.warning("URL for playlist #%d does not contain a playlist id: '%s'. Attempting to fetch, but it may fail.", index + 1, self.url)
-                    self.skip = False
-
-        self.download_mode = playlist.get("download_mode", config.download_mode)
-        self.max_video_quality = playlist.get("max_video_quality", config.max_video_quality)
-
-        self.save_path = Path(playlist.get("save_path", "./music"))
-        self.save_path.mkdir(parents=True, exist_ok=True)
-
-        self.archive = Path(playlist.get("archive", "archive.txt"))
-        if not self.archive.is_absolute():
-            self.archive = self.save_path / self.archive
-        self.archive.touch(exist_ok=True)
-
-        self.yt_dlp = config.yt_dlp_path
-        self.ffmpeg = config.ffmpeg_path
-        self.aria2c = config.aria2c_path
-        self.max_parallel = config.max_parallel_downloads
-        self.aria2c_connections = config.aria2c_connections
-
-    def _run(self, args, label=None):
-        """Run subprocess respecting debug mode. In non-debug mode, suppress stdout and capture stderr for logging."""
-        if self.debug:
-            # allow full binary output to the console
-            return subprocess.run(args, check=True)
-        # non-debug: hide stdout and capture stderr for better logging
-        return subprocess.run(args, check=True, stdout=subprocess.DEVNULL, stderr=subprocess.PIPE, text=True)
-
-    def sanitize_title(self, title, fallback_id):
-        safe_title = title.translate(str.maketrans({c: "-" for c in self.illegal_chars})).strip()
-        return safe_title if safe_title else fallback_id
-
-    def get_file_path(self, track_index, title):
-        return self.save_path / f"{track_index:03d} - {title}.mp3"
-
-    def fetch_videos(self):
-        if getattr(self, "skip", False) or not self.url:
-            return []
-
-        try:
-            result = subprocess.run([self.yt_dlp, "-J", "--flat-playlist", self.url], capture_output=True, text=True, check=True)
-            data = json.loads(result.stdout)
-            entries = data.get("entries", [])
-        except subprocess.CalledProcessError as e:
-            stderr = (e.stderr or "").lower()
-            if any(k in stderr for k in ("private", "sign in", "login required", "403", "authorization failed")):
-                self.logger.warning("Playlist appears to be private or requires authentication: '%s'. Skipping.", self.url)
-                self.skip = True
-                return []
-            self.logger.error("Failed to fetch playlist '%s': %s", self.url, (e.stderr.strip() if e.stderr else str(e)))
-            self.skip = True
-            return []
-        except json.JSONDecodeError:
-            self.logger.error("Failed to parse yt-dlp output for URL: '%s'. Skipping.", self.url)
-            self.skip = True
-            return []
-
-        valid = []
-        for v in entries:
-            if not v:
-                continue
-            title = v.get("title", "")
-            if title in ("[Deleted video]", "[Private video]"):
-                self.logger.info("[SKIP] %s - %s", v.get("id"), title)
-                continue
-            valid.append(v)
-        return valid
-
-    def get_archive_ids(self):
-        ids = set()
-        with self.archive.open("r", encoding="utf-8") as f:
-            for line in f:
-                parts = line.strip().split()
-                if len(parts) >= 2:
-                    ids.add(parts[1])
-        return ids
-
-    def download_video(self, video, track_index):
-        title = video.get("title", "[Unknown]")
-        safe_title = self.sanitize_title(title, video["id"])
-        video_url = f"https://www.youtube.com/watch?v={video['id']}"
-
-        def build_video_format(max_quality):
-            mapping = {
-                "720p": "bestvideo[height<=720]+bestaudio/best[height<=720]",
-                "1080p": "bestvideo[height<=1080]+bestaudio/best[height<=1080]",
-                "1440p": "bestvideo[height<=1440]+bestaudio/best[height<=1440]",
-                "2160p": "bestvideo[height<=2160]+bestaudio/best[height<=2160]",
-                "best": "bestvideo+bestaudio/best",
-            }
-            return mapping.get(max_quality.lower(), mapping["1080p"])
-
-        cmds = []
-
-        if self.download_mode == "audio":
-            output_path = self.save_path / "audio" / f"{track_index:03d} - {safe_title}.mp3"
-            output_path.parent.mkdir(parents=True, exist_ok=True)
-            args = [
-                str(self.yt_dlp),
-                "-f",
-                "bestaudio",
-                "--extract-audio",
-                "--audio-format",
-                "mp3",
-                "--audio-quality",
-                "0",
-            ]
-            if not shutil.which(str(self.ffmpeg)):
-                args += ["--ffmpeg-location", str(self.ffmpeg)]
-            args += [
-                "--download-archive",
-                str(self.archive),
-                "-o",
-                str(output_path),
-                "--external-downloader",
-                str(self.aria2c),
-                "--external-downloader-args",
-                f"aria2c:-x {self.aria2c_connections} -s {self.aria2c_connections}",
-                video_url,
-            ]
-            cmds.append((args, f"{track_index:03d} - {title} (audio)"))
-
-        elif self.download_mode == "video":
-            output_path = self.save_path / "video" / f"{track_index:03d} - {safe_title}.mp4"
-            output_path.parent.mkdir(parents=True, exist_ok=True)
-            fmt = build_video_format(self.max_video_quality)
-            args = [
-                str(self.yt_dlp),
-                "-f",
-                fmt,
-                "--merge-output-format",
-                "mp4",
-            ]
-            if not shutil.which(str(self.ffmpeg)):
-                args += ["--ffmpeg-location", str(self.ffmpeg)]
-            args += [
-                "--download-archive",
-                str(self.archive),
-                "-o",
-                str(output_path),
-                "--external-downloader",
-                str(self.aria2c),
-                "--external-downloader-args",
-                f"aria2c:-x {self.aria2c_connections} -s {self.aria2c_connections}",
-                video_url,
-            ]
-            cmds.append((args, f"{track_index:03d} - {title} (video)"))
-
-        elif self.download_mode == "both":
-            # download video first
-            video_folder = self.save_path / "video"
-            video_folder.mkdir(parents=True, exist_ok=True)
-            video_output = video_folder / f"{track_index:03d} - {safe_title}.mp4"
-            fmt = build_video_format(self.max_video_quality)
-            video_args = [
-                str(self.yt_dlp),
-                "-f",
-                fmt,
-                "--merge-output-format",
-                "mp4",
-                "--download-archive",
-                str(self.archive),
-                "-o",
-                str(video_output),
-                "--external-downloader",
-                str(self.aria2c),
-                "--external-downloader-args",
-                f"aria2c:-x {self.aria2c_connections} -s {self.aria2c_connections}",
-                video_url,
-            ]
-            try:
-                self._run(video_args, label=f"{track_index:03d} - {title} (video)")
-            except subprocess.CalledProcessError as e:
-                err = (e.stderr or "").strip()
-                self.logger.error("Video download failed: %s — %s", title, err)
-                return False
-
-            # extract audio
-            audio_folder = self.save_path / "audio"
-            audio_folder.mkdir(parents=True, exist_ok=True)
-            audio_output = audio_folder / f"{track_index:03d} - {safe_title}.mp3"
-            ffmpeg_exe = str(self.ffmpeg)
-            if not (shutil.which(ffmpeg_exe) or Path(ffmpeg_exe).is_file()):
-                ffmpeg_exe = shutil.which("ffmpeg") or ffmpeg_exe
-
-            if ffmpeg_exe:
-                ffmpeg_cmd = [
-                    ffmpeg_exe,
-                    "-y",
-                    "-i",
-                    str(video_output),
-                    "-vn",
-                    "-codec:a",
-                    "libmp3lame",
-                    "-q:a",
-                    "0",
-                    str(audio_output),
-                ]
-                try:
-                    self._run(ffmpeg_cmd, label=f"extract audio {track_index:03d} - {title}")
-                except subprocess.CalledProcessError as e:
-                    self.logger.warning("ffmpeg failed to extract audio for %s: %s", title, (e.stderr or "").strip())
-            else:
-                self.logger.warning("ffmpeg not found; audio not extracted for %s.", title)
-
-            self.logger.info("Downloaded video and extracted audio for: %s - %s", f"{track_index:03d}", title)
-            return True
-
-        else:
-            self.logger.error("Invalid download_mode '%s', skipping", self.download_mode)
-            return False
-
-        # execute single or multiple commands
-        success = True
-        for args, label in cmds:
-            try:
-                self._run(args, label=label)
-                self.logger.info("Downloaded: %s", label)
-            except subprocess.CalledProcessError as e:
-                err_msg = (e.stderr.strip().splitlines()[-1] if e.stderr else "Unknown error")
-                self.logger.error("Download failed: %s — %s", label, err_msg)
-                success = False
-
-        return success
-
-    def renumber_all_tracks(self, playlist_entries):
-        self.logger.info("Renumbering files according to playlist order")
-        temp_suffix = ".renametemp"
-
-        final_map_audio = {}
-        final_map_video = {}
-
-        for idx, video in enumerate(playlist_entries, start=1):
-            title = video.get("title", "[Unknown]")
-            safe_title = self.sanitize_title(title, video["id"])
-
-            if self.download_mode in ("audio", "both"):
-                final_map_audio[safe_title] = f"{idx:03d} - {safe_title}.mp3"
-            if self.download_mode in ("video", "both"):
-                final_map_video[safe_title] = f"{idx:03d} - {safe_title}.mp4"
-
-        def rename_files(folder, mapping, ext):
-            folder.mkdir(parents=True, exist_ok=True)
-            for safe_title, correct_fname in mapping.items():
-                matches = list(folder.glob(f"*{ext}"))
-                for m in matches:
-                    if safe_title in m.name:
-                        if m.name != correct_fname:
-                            temp_path = m.with_suffix(m.suffix + temp_suffix)
-                            m.rename(temp_path)
-
-            for safe_title, correct_fname in mapping.items():
-                temp_match = list(folder.glob(f"*{ext}{temp_suffix}"))
-                for temp_path in temp_match:
-                    final_path = folder / correct_fname
-                    self.logger.info("Renaming '%s' → '%s'", temp_path.name, final_path.name)
-                    temp_path.rename(final_path)
-
-        if self.download_mode in ("audio", "both"):
-            rename_files(self.save_path / "audio", final_map_audio, ".mp3")
-        if self.download_mode in ("video", "both"):
-            rename_files(self.save_path / "video", final_map_video, ".mp4")
-
-        self.logger.info("Renumbering complete.")
-
-    def update(self):
-        playlist_id = self.url or self.save_path or "unknown playlist"
-        if getattr(self, "skip", False):
-            self.logger.warning("Skipping playlist '%s': URL missing in the config.", playlist_id)
-            return
-
-        self.logger.info("Updating playlist: %s", playlist_id)
-        playlist_entries = self.fetch_videos()
-        archive_ids = self.get_archive_ids()
-        new_videos = [v for v in playlist_entries if v["id"] not in archive_ids]
-
-        if not new_videos:
-            self.logger.info("No new items found.")
-        else:
-            self.logger.info("Found %d new item(s) to download.", len(new_videos))
-
-            idx_map = {v["id"]: i + 1 for i, v in enumerate(playlist_entries)}
-
-            with ThreadPoolExecutor(max_workers=self.max_parallel) as executor:
-                futures = [executor.submit(self.download_video, v, idx_map[v["id"]]) for v in new_videos]
-                for f in as_completed(futures):
-                    try:
-                        f.result()
-                    except subprocess.CalledProcessError as e:
-                        self.logger.error("Download failed: %s", e)
-
-        self.renumber_all_tracks(playlist_entries)
-        self.cleanup_removed_tracks(playlist_entries)
-
-    def cleanup_removed_tracks(self, playlist_entries):
-        self.logger.info("Checking for files not in the playlist")
-        valid_titles = set()
-        for video in playlist_entries:
-            title = video.get("title", "[Unknown]")
-            safe_title = self.sanitize_title(title, video["id"])
-            valid_titles.add(safe_title)
-
-        def clean_folder(folder, ext):
-            to_delete = []
-            folder.mkdir(parents=True, exist_ok=True)
-            for file in folder.glob(f"*{ext}"):
-                parts = file.name.split(" - ", 1)
-                if len(parts) == 2:
-                    safe_title_in_file = parts[1][: -len(ext)]
-                    if safe_title_in_file not in valid_titles:
-                        to_delete.append(file)
-
-            if not to_delete:
-                return
-
-            self.logger.warning("The following files in '%s' are not in the playlist and will be deleted:", folder)
-            for f in to_delete:
-                self.logger.warning("  %s", f.name)
-
-            if not self.prune:
-                self.logger.info("Prune disabled; no files will be deleted in '%s'.", folder)
-                return
-
-            try:
-                if self.non_interactive:
-                    confirm = "y"
-                else:
-                    confirm = input("Delete these files? [y/N]: ").strip().lower()
-            except EOFError:
-                confirm = "n"
-
-            if confirm == "y":
-                for f in to_delete:
-                    try:
-                        f.unlink()
-                        self.logger.info("Deleted: %s", f.name)
-                    except Exception as ex:
-                        self.logger.error("Failed to delete %s: %s", f.name, ex)
-                self.logger.info("Cleanup complete in '%s'.", folder)
-            else:
-                self.logger.info("Cleanup aborted in '%s'. No files were deleted.", folder)
-
-        if self.download_mode in ("audio", "both"):
-            clean_folder(self.save_path / "audio", ".mp3")
-        if self.download_mode in ("video", "both"):
-            clean_folder(self.save_path / "video", ".mp4")

src/manager.py

@@ -1,27 +0,0 @@
-import time
-import logging
-
-from .downloader import PlaylistDownloader
-
-
-class PlaylistManager:
-    def __init__(self, config, debug: bool = False):
-        self.logger = logging.getLogger(__name__)
-        self.config = config
-        # store debug on config so PlaylistDownloader __init__ can pick it up
-        setattr(self.config, "debug", bool(debug))
-        self.playlists = [PlaylistDownloader(config, pl, idx) for idx, pl in enumerate(config.playlists)]
-
-    def run(self):
-        total_connections = self.config.max_parallel_downloads * self.config.aria2c_connections
-        if total_connections > 100:
-            self.logger.warning(
-                "Total connections (%d × %d = %d) may overload your network! Pausing 5 seconds...",
-                self.config.max_parallel_downloads,
-                self.config.aria2c_connections,
-                total_connections,
-            )
-            time.sleep(5)
-
-        for playlist in self.playlists:
-            playlist.update()

tests/conftest.py

@@ -1,9 +0,0 @@
-import pytest
-
-from tests.dummy_config import DummyConfig
-
-
-@pytest.fixture
-def dummy_config():
-    """Return a fresh DummyConfig instance for tests to customize."""
-    return DummyConfig()

tests/dummy_config.py

@@ -1,19 +0,0 @@
-import os
-
-
-class DummyConfig:
-    """Small test configuration object used by unit and integration tests.
-
-    Adjust attributes via environment variables where appropriate.
-    """
-    yt_dlp_path = os.getenv("YTDLP_PATH", "yt-dlp")
-    ffmpeg_path = os.getenv("FFMPEG_PATH", "ffmpeg")
-    aria2c_path = os.getenv("ARIA2C_PATH", "aria2c")
-    max_parallel_downloads = int(os.getenv("TEST_MAX_PARALLEL", "2"))
-    aria2c_connections = int(os.getenv("TEST_ARIA2C_CONN", "2"))
-    download_mode = os.getenv("TEST_DOWNLOAD_MODE", "audio")
-    max_video_quality = os.getenv("TEST_MAX_VIDEO_QUALITY", "1080p")
-    # runtime flags
-    debug = False
-    non_interactive = False
-    prune = False

tests/integration_full_workflow_test.py

@@ -1,160 +0,0 @@
-"""
-Full integration test (opt-in):
-- Set environment variable INTEGRATION_TEST=1 to enable
-- Optionally set TEST_PLAYLIST_URL to a full playlist URL; otherwise the built-in playlist id will be used
-
-This script will attempt to download real audio/video for a small playlist (3 items).
-It will run three modes: audio, video, and both. It is intentionally opt-in to avoid accidental large downloads.
-"""
-import os
-import sys
-import shutil
-import time
-from pathlib import Path
-
-from src.downloader import PlaylistDownloader
-from tests.dummy_config import DummyConfig
-
-# Make imports robust when running the script directly from different working directories.
-# Ensure the repository root and this tests folder are on sys.path so the script can import
-# both the package (`src`) and local test helpers (`tests.temp_config`).
-REPO_ROOT = Path(__file__).resolve().parents[1]
-TESTS_DIR = Path(__file__).resolve().parent
-if str(REPO_ROOT) not in sys.path:
-    sys.path.insert(0, str(REPO_ROOT))
-if str(TESTS_DIR) not in sys.path:
-    sys.path.insert(0, str(TESTS_DIR))
-
-if not os.getenv("INTEGRATION_TEST"):
-    print("Skipping full integration test (set INTEGRATION_TEST=1 to enable)")
-    sys.exit(0)
-
-# Prefer local ./bin/ executables for integration runs when available.
-# Set environment variables before importing TempConfig so its class attributes
-# pick up these overridden paths.
-bin_dir = REPO_ROOT / "bin" / "linux"
-if bin_dir.exists():
-    ytdlp_path = bin_dir / "yt-dlp"
-    if ytdlp_path.exists():
-        os.environ.setdefault("YTDLP_PATH", str(ytdlp_path))
-        print(f"Using local yt-dlp at: {ytdlp_path}")
-    ffmpeg_path = bin_dir / "ffmpeg"
-    if ffmpeg_path.exists():
-        os.environ.setdefault("FFMPEG_PATH", str(ffmpeg_path))
-        print(f"Using local ffmpeg at: {ffmpeg_path}")
-    aria2c_path = bin_dir / "aria2c"
-    if aria2c_path.exists():
-        os.environ.setdefault("ARIA2C_PATH", str(aria2c_path))
-        print(f"Using local aria2c at: {aria2c_path}")
-
-# allow caller to override playlist url via env
-playlist_url = os.getenv("TEST_PLAYLIST_URL")
-if not playlist_url:
-    # Use provided playlist id (3 videos)
-    playlist_id = "PLUmRr21IDW9WCW87FnbWAbIwwZHbf-lAz"
-    playlist_url = f"https://www.youtube.com/playlist?list={playlist_id}"
-
-print(f"Using playlist URL: {playlist_url}")
-
-cfg_base = DummyConfig()
-
-# ensure yt-dlp exists
-if not shutil.which(str(cfg_base.yt_dlp_path)):
-    print(f"yt-dlp binary not found at '{cfg_base.yt_dlp_path}'. Please install yt-dlp or set YTDLP_PATH environment variable.")
-    sys.exit(2)
-
-MODES = ["audio", "video", "both"]
-
-root_tmp = Path("./tests/tmp_integration_full")
-root_tmp.mkdir(parents=True, exist_ok=True)
-
-failed = False
-for mode in MODES:
-    print(f"\n=== Running mode: {mode} ===")
-    cfg = DummyConfig()
-    # Allow enabling verbose subprocess output from CI by setting YTPL_DEBUG=1
-    cfg.debug = bool(os.getenv("YTPL_DEBUG", "0") == "1")
-    cfg.download_mode = mode
-    # make downloads single-threaded for predictability
-    cfg.max_parallel_downloads = 1
-    cfg.aria2c_connections = 1
-
-    save_path = root_tmp / mode
-    # ensure a clean directory per run
-    if save_path.exists():
-        try:
-            shutil.rmtree(save_path)
-        except Exception:
-            pass
-
-    playlist = {"url": playlist_url, "save_path": str(save_path), "archive": f"archive_{mode}.txt"}
-
-    downloader = PlaylistDownloader(cfg, playlist, 0)
-    # Print resolved binary paths for debugging
-    try:
-        print(f"Resolved yt-dlp path: {cfg.yt_dlp_path}")
-        print(f"Resolved ffmpeg path: {cfg.ffmpeg_path}")
-        print(f"Resolved aria2c path: {cfg.aria2c_path}")
-    except Exception:
-        pass
-
-    try:
-        start = time.time()
-        downloader.update()
-        dur = time.time() - start
-        print(f"Mode {mode} completed in {dur:.1f}s")
-
-        # basic verifications
-        if mode in ("audio", "both"):
-            audio_folder = save_path / "audio"
-            mp3s = list(audio_folder.glob("*.mp3")) if audio_folder.exists() else []
-            print(f"Found {len(mp3s)} mp3 files in {audio_folder}")
-            if len(mp3s) < 3:
-                print(f"Expected >=3 mp3 files for mode={mode}, found {len(mp3s)}")
-                failed = True
-        if mode in ("video", "both"):
-            video_folder = save_path / "video"
-            mp4s = list(video_folder.glob("*.mp4")) if video_folder.exists() else []
-            print(f"Found {len(mp4s)} mp4 files in {video_folder}")
-            if len(mp4s) < 3:
-                print(f"Expected >=3 mp4 files for mode={mode}, found {len(mp4s)}")
-                failed = True
-
-        # check archive has entries
-        archive_file = (save_path / f"archive_{mode}.txt")
-        if archive_file.exists():
-            lines = [line for line in archive_file.read_text(encoding='utf-8').splitlines() if line.strip()]
-            print(f"Archive {archive_file} contains {len(lines)} lines")
-            if len(lines) < 3:
-                print(f"Expected archive to contain >=3 lines, found {len(lines)}")
-                # Not necessarily fatal; mark failure but continue
-                failed = True
-        else:
-            print(f"Archive file {archive_file} not found")
-            failed = True
-
-    except Exception as ex:
-        print(f"Exception during mode {mode}: {ex}")
-        failed = True
-
-    # cleanup to avoid leaving large files around
-    try:
-        if save_path.exists():
-            shutil.rmtree(save_path)
-            print(f"Cleaned up {save_path}")
-    except Exception as ex:
-        print(f"Failed to clean up {save_path}: {ex}")
-
-# final cleanup
-try:
-    if root_tmp.exists():
-        shutil.rmtree(root_tmp)
-except Exception:
-    pass
-
-if failed:
-    print("Integration full workflow test encountered failures.")
-    sys.exit(3)
-
-print("Integration full workflow test completed successfully")
-sys.exit(0)

tests/test_cli_flags.py

@@ -1,23 +0,0 @@
-import logging
-from src.manager import PlaylistManager
-from tests.dummy_config import DummyConfig
-
-
-def test_run_with_prune_disabled():
-    logging.basicConfig(level=logging.INFO, format="%(levelname)s:%(message)s")
-    cfg = DummyConfig()
-    cfg.playlists = [{"url": None, "save_path": "tests/tmp_test", "archive": "archive.txt"}]
-    m = PlaylistManager(cfg, debug=False)
-    # should complete without raising
-    m.run()
-
-
-def test_run_with_prune_enabled_non_interactive():
-    logging.basicConfig(level=logging.INFO, format="%(levelname)s:%(message)s")
-    cfg = DummyConfig()
-    cfg.playlists = [{"url": None, "save_path": "tests/tmp_test", "archive": "archive.txt"}]
-    cfg.prune = True
-    cfg.non_interactive = True
-    m = PlaylistManager(cfg, debug=False)
-    # should complete without raising
-    m.run()

tests/test_cli_update_and_logging.py

@@ -1,45 +0,0 @@
-import logging
-import subprocess
-from types import SimpleNamespace
-
-import src.cli as cli_mod
-
-
-class DummyCompleted(SimpleNamespace):
-    pass
-
-
-def test_update_yt_dlp_success(monkeypatch, caplog):
-    called = {"count": 0}
-
-    def fake_run(args, check=True, **kw):
-        called["count"] += 1
-        return DummyCompleted(returncode=0)
-
-    monkeypatch.setattr(subprocess, "run", fake_run)
-
-    caplog.set_level(logging.INFO)
-    cli_mod.update_yt_dlp("yt-dlp", debug=False)
-    assert called["count"] == 1
-    assert any("up to date" in r.message.lower() for r in caplog.records)
-
-
-def test_update_yt_dlp_failure(monkeypatch, caplog):
-    def raise_called(*a, **k):
-        raise subprocess.CalledProcessError(1, cmd=a[0])
-
-    monkeypatch.setattr(subprocess, "run", raise_called)
-    caplog.set_level(logging.WARNING)
-    cli_mod.update_yt_dlp("yt-dlp", debug=False)
-    assert any("could not update yt-dlp" in r.message.lower() or "could not update" in r.message.lower() for r in caplog.records)
-
-
-def test_configure_logging_sets_levels():
-    # ensure calling configure_logging flips global root logger level
-    # clear existing handlers so basicConfig can take effect in test
-    logging.root.handlers.clear()
-    cli_mod.configure_logging(True)
-    assert logging.getLogger().getEffectiveLevel() == logging.DEBUG
-    logging.root.handlers.clear()
-    cli_mod.configure_logging(False)
-    assert logging.getLogger().getEffectiveLevel() == logging.INFO

tests/test_config_loader_basic.py

@@ -1,28 +0,0 @@
-import json
-
-from src.config import ConfigLoader
-
-
-def test_config_loader_reads_properties(tmp_path, monkeypatch):
-    # create a minimal config file with known binary names that exist on PATH
-    cfg = {
-        "playlists": [{"url": "https://www.youtube.com/playlist?list=FAKE", "save_path": "./tmp", "archive": "archive.txt"}],
-        "yt_dlp_path": "python",
-        "ffmpeg_path": "python",
-        "aria2c_path": "python",
-        "max_parallel_downloads": 3,
-        "aria2c_connections": 2,
-    }
-
-    p = tmp_path / "yt-playlist-config.json"
-    p.write_text(json.dumps(cfg), encoding="utf-8")
-
-    # Use absolute path so ConfigLoader doesn't try to create ./config
-    loader = ConfigLoader(str(p))
-
-    assert loader.playlists == cfg["playlists"]
-    assert loader.yt_dlp_path == "python"
-    assert loader.ffmpeg_path == "python"
-    assert loader.aria2c_path == "python"
-    assert loader.max_parallel_downloads == 3
-    assert loader.aria2c_connections == 2

tests/test_download_quality_format.py

@@ -0,0 +1,15 @@
+from __future__ import annotations
+
+from app.core.download.downloader import Downloader
+
+
+def test_build_format_defaults_to_best_mp4():
+    fmt = Downloader.build_format(None)
+    assert "height<=1080" in fmt
+    assert fmt.endswith("/best[ext=mp4]")
+
+
+def test_build_format_applies_height_cap():
+    fmt = Downloader.build_format("720p")
+    assert "height<=720" in fmt
+

tests/test_download_video_edgecases.py

@@ -1,40 +0,0 @@
-import subprocess
-import shutil
-
-from src.downloader import PlaylistDownloader
-from tests.dummy_config import DummyConfig
-
-
-def test_download_video_invalid_mode(tmp_path):
-    cfg = DummyConfig()
-    playlist = {"url": "https://www.youtube.com/playlist?list=FAKE", "save_path": str(tmp_path)}
-    dl = PlaylistDownloader(cfg, playlist, 0)
-    dl.download_mode = "invalid_mode"
-    video = {"id": "X1", "title": "Test"}
-    assert dl.download_video(video, 1) is False
-
-
-def test_download_video_both_mode_ffmpeg_missing(monkeypatch, tmp_path, caplog):
-    cfg = DummyConfig()
-    playlist = {"url": "https://www.youtube.com/playlist?list=FAKE", "save_path": str(tmp_path)}
-    dl = PlaylistDownloader(cfg, playlist, 0)
-    dl.download_mode = "both"
-
-    video = {"id": "X1", "title": "Test"}
-
-    # monkeypatch _run to simulate successful video download and ffmpeg extraction failure path
-    def fake_run(*args, **kwargs):
-        # accept label or other kwargs; simulate successful call
-        return subprocess.CompletedProcess(args, 0)
-
-    monkeypatch.setattr(PlaylistDownloader, "_run", fake_run)
-
-    # Ensure ffmpeg is not found
-    monkeypatch.setattr(shutil, "which", lambda p: None)
-
-    # Should not raise; will log a warning about ffmpeg missing
-    caplog.set_level("WARNING")
-    ok = dl.download_video(video, 1)
-    # For 'both' mode the function returns True when video download succeeded (we simulate that)
-    assert ok is True
-    assert any("ffmpeg not found" in r.message.lower() or "ffmpeg failed" in r.message.lower() for r in caplog.records) or True

tests/test_downloader_sanitize_and_path.py

@@ -1,24 +0,0 @@
-from pathlib import Path
-
-from src.downloader import PlaylistDownloader
-from tests.dummy_config import DummyConfig
-
-
-def test_sanitize_title_and_get_file_path(tmp_path):
-    cfg = DummyConfig()
-    playlist = {"url": None, "save_path": str(tmp_path)}
-    dl = PlaylistDownloader(cfg, playlist, 0)
-
-    # illegal chars should be replaced and trimmed; fallback_id used when title becomes empty
-    title = '  My: <>:"/\\|?*Title  '
-    safe = dl.sanitize_title(title, "ABC123")
-    # ensure no illegal characters remain
-    assert all(c not in safe for c in dl.illegal_chars)
-
-    # empty title should return fallback id
-    assert dl.sanitize_title("   ", "FALLBACK") == "FALLBACK"
-
-    # get_file_path uses save_path and zero-padded index
-    path = dl.get_file_path(5, "SongName")
-    assert isinstance(path, Path)
-    assert path.name.startswith("005 - SongName")

tests/test_event_surface.py

@@ -0,0 +1,83 @@
+from __future__ import annotations
+
+import asyncio
+import sys
+
+from app.core.download.downloader import Downloader
+from app.core.download.queue_manager import DownloadJob
+from app.core.events.event_bus import EventBus
+from app.core.models import PlaylistItem, SyncAction, SyncActionType
+from app.core.sync.executor import ActionExecutor
+
+
+def test_executor_emits_sync_events(tmp_path):
+    published: list[tuple[str, dict]] = []
+
+    class TestBus(EventBus):
+        async def publish(self, event_name: str, payload: dict) -> None:  # type: ignore[override]
+            published.append((event_name, dict(payload)))
+
+    class StubDB:
+        def update_local_filename(self, playlist_id: str, video_id: str, filename: str) -> None:
+            return None
+
+        def mark_downloaded(self, playlist_id: str, video_id: str, downloaded: bool) -> None:
+            return None
+
+    bus = TestBus()
+    ex = ActionExecutor(StubDB(), concurrency=1, event_bus=bus)  # type: ignore[arg-type]
+
+    item = PlaylistItem(playlist_id="p", video_id="v", title="t", playlist_index=1)
+    actions = [SyncAction(SyncActionType.SKIP, item=item, to_name="0001 - t.mp4")]
+
+    asyncio.run(ex.execute(actions, {"url": "p", "save_path": str(tmp_path)}))
+
+    names = [n for n, _ in published]
+    assert "SyncStarted" in names
+    assert "SyncSummary" in names
+    assert "SyncFinished" in names
+
+    summary = [p for n, p in published if n == "SyncSummary"][0]
+    assert summary["playlist_id"] == "p"
+    assert "duration_s" in summary
+    assert isinstance(summary["counts"], dict)
+
+
+def test_downloader_progress_hook_calls_callback(tmp_path, monkeypatch):
+    callbacks: list[dict] = []
+
+    class DummyYDL:
+        def __init__(self, opts):
+            self.opts = opts
+
+        def __enter__(self):
+            return self
+
+        def __exit__(self, exc_type, exc, tb):
+            return False
+
+        def download(self, urls):
+            hooks = self.opts.get("progress_hooks") or []
+            for h in hooks:
+                h({"status": "downloading", "downloaded_bytes": 50, "total_bytes": 100, "speed": 1.0, "eta": 1, "filename": "x"})
+                h({"status": "finished", "downloaded_bytes": 100, "total_bytes": 100, "speed": 1.0, "eta": 0, "filename": "x"})
+
+    dummy = type("yt_dlp", (), {"YoutubeDL": DummyYDL})
+    monkeypatch.setitem(sys.modules, "yt_dlp", dummy)
+
+    ffmpeg = tmp_path / "ffmpeg"
+    ffmpeg.write_text("x", encoding="utf-8")
+
+    job = DownloadJob(
+        item=PlaylistItem(playlist_id="p", video_id="v", title="t", playlist_index=1),
+        url="https://example.invalid",
+        output_path=tmp_path / "out.mp4",
+        ffmpeg_path=str(ffmpeg),
+    )
+    job.progress_callback = lambda payload: callbacks.append(dict(payload))
+
+    dl = Downloader()
+    asyncio.run(dl._download(job))  # type: ignore[attr-defined]
+
+    assert callbacks
+    assert any("progress" in c for c in callbacks)

tests/test_fetch_videos.py

@@ -1,48 +0,0 @@
-import json
-import subprocess
-from types import SimpleNamespace
-
-from src.downloader import PlaylistDownloader
-from tests.dummy_config import DummyConfig
-
-
-class DummyCompleted(SimpleNamespace):
-    pass
-
-
-def test_fetch_videos_parses_entries(monkeypatch, tmp_path):
-    cfg = DummyConfig()
-    playlist = {"url": "https://www.youtube.com/playlist?list=FAKE", "save_path": str(tmp_path)}
-    dl = PlaylistDownloader(cfg, playlist, 0)
-
-    entries = [{"id": "A1", "title": "Song 1"}, {"id": "B2", "title": "Song 2"}]
-    out = json.dumps({"entries": entries})
-
-    def fake_run(args, capture_output=True, text=True, check=True):
-        return DummyCompleted(stdout=out)
-
-    monkeypatch.setattr(subprocess, "run", fake_run)
-
-    res = dl.fetch_videos()
-    assert isinstance(res, list)
-    assert len(res) == 2
-    assert res[0]["id"] == "A1"
-
-
-def test_fetch_videos_handles_private_and_errors(monkeypatch, tmp_path, caplog):
-    cfg = DummyConfig()
-    playlist = {"url": "https://www.youtube.com/playlist?list=FAKE", "save_path": str(tmp_path)}
-    dl = PlaylistDownloader(cfg, playlist, 0)
-
-    # simulate CalledProcessError with 'private' message
-    def raise_called(*a, **k):
-        e = subprocess.CalledProcessError(1, cmd=a[0])
-        e.stderr = "This playlist is private"
-        raise e
-
-    monkeypatch.setattr(subprocess, "run", raise_called)
-
-    caplog.set_level("WARNING")
-    res = dl.fetch_videos()
-    assert res == []
-    assert dl.skip is True

tests/test_integration_audio.py

@@ -0,0 +1,80 @@
+from __future__ import annotations
+
+import os
+
+import pytest
+
+from app.core.database.db import Database
+from app.core.sync.executor import ActionExecutor
+from app.core.events.event_bus import EventBus
+from app.core.sync.service import SyncService
+
+
+PLAYLIST_URL = os.getenv("TEST_PLAYLIST_URL")
+
+
+def _require_integration():
+    if not os.getenv("INTEGRATION_TEST"):
+        pytest.skip("Set INTEGRATION_TEST=1 to enable real download tests")
+    if not PLAYLIST_URL:
+        pytest.skip("Set TEST_PLAYLIST_URL to enable real download tests")
+
+
+def _skip_if_bot_check(errors: list[str]) -> None:
+    msg = "\n".join(errors).lower()
+    if "sign in to confirm you’re not a bot" in msg or "sign in to confirm you're not a bot" in msg:
+        pytest.skip("YouTube bot-check blocked download; provide cookies to yt-dlp to run this test reliably")
+
+
+@pytest.mark.integration
+def test_integration_download_audio(tmp_path):
+    _require_integration()
+    if not os.getenv("FFMPEG_PATH"):
+        pytest.skip("Set FFMPEG_PATH to a working ffmpeg binary to enable audio extraction downloads")
+
+    db_path = tmp_path / "app.db"
+    save_path = tmp_path / "downloads"
+    save_path.mkdir(parents=True, exist_ok=True)
+
+    cfg = {
+        "url": PLAYLIST_URL,
+        "download_mode": "audio",
+        "save_path": str(save_path),
+        # Must be set to a real ffmpeg path for this test to pass.
+        "ffmpeg_path": os.getenv("FFMPEG_PATH"),
+        "max_download_quality": "1080p",
+    }
+
+    db = Database(db_path.resolve())
+    service = SyncService(db)
+    actions = service.sync_from_config(cfg)
+
+    download_actions = [a for a in actions if a.type.name == "DOWNLOAD"]
+    if not download_actions:
+        pytest.skip("No download actions produced (playlist empty or already downloaded?)")
+
+    first_vid = download_actions[0].item.video_id if download_actions[0].item else None
+    assert first_vid
+    # For audio mode there should be a single mp3 target for this video id.
+    subset = [a for a in download_actions if a.item and a.item.video_id == first_vid]
+    subset = [a for a in subset if (a.to_name or "").endswith(".mp3")]
+    assert subset
+
+    errors: list[str] = []
+    bus = EventBus()
+
+    async def on_failed(payload):
+        errors.append(str(payload.get("error", "")))
+
+    bus.subscribe("DownloadFailed", on_failed)
+
+    executor = ActionExecutor(db, concurrency=1, event_bus=bus)
+    import asyncio
+
+    asyncio.run(executor.execute(subset, cfg))
+
+    audio_dir = save_path / "audio"
+    assert audio_dir.exists()
+    if not any(p.suffix.lower() == ".mp3" for p in audio_dir.glob("*.mp3")):
+        _skip_if_bot_check(errors)
+        assert False

tests/test_integration_both.py

@@ -0,0 +1,84 @@
+from __future__ import annotations
+
+import os
+
+import pytest
+
+from app.core.database.db import Database
+from app.core.sync.executor import ActionExecutor
+from app.core.events.event_bus import EventBus
+from app.core.sync.service import SyncService
+
+
+PLAYLIST_URL = os.getenv("TEST_PLAYLIST_URL")
+
+
+def _require_integration():
+    if not os.getenv("INTEGRATION_TEST"):
+        pytest.skip("Set INTEGRATION_TEST=1 to enable real download tests")
+    if not PLAYLIST_URL:
+        pytest.skip("Set TEST_PLAYLIST_URL to enable real download tests")
+
+
+def _skip_if_bot_check(errors: list[str]) -> None:
+    msg = "\n".join(errors).lower()
+    if "sign in to confirm you’re not a bot" in msg or "sign in to confirm you're not a bot" in msg:
+        pytest.skip("YouTube bot-check blocked download; provide cookies to yt-dlp to run this test reliably")
+
+
+@pytest.mark.integration
+def test_integration_download_both(tmp_path):
+    _require_integration()
+    if not os.getenv("FFMPEG_PATH"):
+        pytest.skip("Set FFMPEG_PATH to a working ffmpeg binary to enable audio extraction downloads")
+
+    db_path = tmp_path / "app.db"
+    save_path = tmp_path / "downloads"
+    save_path.mkdir(parents=True, exist_ok=True)
+
+    cfg = {
+        "url": PLAYLIST_URL,
+        "download_mode": "both",
+        "save_path": str(save_path),
+        # Must be set to a real ffmpeg path for this test to pass.
+        "ffmpeg_path": os.getenv("FFMPEG_PATH"),
+        "max_download_quality": "1080p",
+    }
+
+    db = Database(db_path.resolve())
+    service = SyncService(db)
+    actions = service.sync_from_config(cfg)
+
+    download_actions = [a for a in actions if a.type.name == "DOWNLOAD"]
+    if not download_actions:
+        pytest.skip("No download actions produced (playlist empty or already downloaded?)")
+
+    first_vid = download_actions[0].item.video_id if download_actions[0].item else None
+    assert first_vid
+    subset = [a for a in download_actions if a.item and a.item.video_id == first_vid]
+
+    mp4 = [a for a in subset if (a.to_name or "").endswith(".mp4")]
+    mp3 = [a for a in subset if (a.to_name or "").endswith(".mp3")]
+    assert mp4 and mp3
+
+    errors: list[str] = []
+    bus = EventBus()
+
+    async def on_failed(payload):
+        errors.append(str(payload.get("error", "")))
+
+    bus.subscribe("DownloadFailed", on_failed)
+
+    executor = ActionExecutor(db, concurrency=1, event_bus=bus)
+    import asyncio
+
+    asyncio.run(executor.execute(mp4 + mp3, cfg))
+
+    audio_dir = save_path / "audio"
+    video_dir = save_path / "video"
+    assert audio_dir.exists() and video_dir.exists()
+    has_mp3 = any(p.suffix.lower() == ".mp3" for p in audio_dir.glob("*.mp3"))
+    has_mp4 = any(p.suffix.lower() == ".mp4" for p in video_dir.glob("*.mp4"))
+    if not (has_mp3 and has_mp4):
+        _skip_if_bot_check(errors)
+        assert False

tests/test_integration_video.py

@@ -0,0 +1,76 @@
+from __future__ import annotations
+
+import os
+
+import pytest
+
+from app.core.database.db import Database
+from app.core.sync.executor import ActionExecutor
+from app.core.events.event_bus import EventBus
+from app.core.sync.service import SyncService
+
+
+PLAYLIST_URL = os.getenv("TEST_PLAYLIST_URL")
+
+
+def _require_integration():
+    if not os.getenv("INTEGRATION_TEST"):
+        pytest.skip("Set INTEGRATION_TEST=1 to enable real download tests")
+    if not PLAYLIST_URL:
+        pytest.skip("Set TEST_PLAYLIST_URL to enable real download tests")
+
+
+def _skip_if_bot_check(errors: list[str]) -> None:
+    msg = "\n".join(errors).lower()
+    if "sign in to confirm you’re not a bot" in msg or "sign in to confirm you're not a bot" in msg:
+        pytest.skip("YouTube bot-check blocked download; provide cookies to yt-dlp to run this test reliably")
+
+
+@pytest.mark.integration
+def test_integration_download_video(tmp_path):
+    _require_integration()
+
+    db_path = tmp_path / "app.db"
+    save_path = tmp_path / "downloads"
+    save_path.mkdir(parents=True, exist_ok=True)
+
+    cfg = {
+        "url": PLAYLIST_URL,
+        "download_mode": "video",
+        "save_path": str(save_path),
+        "ffmpeg_path": os.getenv("FFMPEG_PATH"),
+        "max_download_quality": "1080p",
+    }
+
+    db = Database(db_path.resolve())
+    service = SyncService(db)
+    actions = service.sync_from_config(cfg)
+
+    download_actions = [a for a in actions if a.type.name == "DOWNLOAD"]
+    if not download_actions:
+        pytest.skip("No download actions produced (playlist empty or already downloaded?)")
+
+    first_vid = download_actions[0].item.video_id if download_actions[0].item else None
+    assert first_vid
+    subset = [a for a in download_actions if a.item and a.item.video_id == first_vid]
+    subset = [a for a in subset if (a.to_name or "").endswith(".mp4")]
+    assert subset
+
+    errors: list[str] = []
+    bus = EventBus()
+
+    async def on_failed(payload):
+        errors.append(str(payload.get("error", "")))
+
+    bus.subscribe("DownloadFailed", on_failed)
+
+    executor = ActionExecutor(db, concurrency=1, event_bus=bus)
+    import asyncio
+
+    asyncio.run(executor.execute(subset, cfg))
+
+    video_dir = save_path / "video"
+    assert video_dir.exists()
+    if not any(p.suffix.lower() == ".mp4" for p in video_dir.glob("*.mp4")):
+        _skip_if_bot_check(errors)
+        assert False

tests/test_manager_connection_warning.py

@@ -1,26 +0,0 @@
-import logging
-from tests.dummy_config import DummyConfig
-from src.manager import PlaylistManager
-
-
-def test_manager_warns_and_sleeps(monkeypatch, caplog):
-    # Avoid actually sleeping during the test
-    slept = {"called": False}
-
-    def fake_sleep(sec):
-        slept["called"] = True
-
-    # monkeypatch the sleep used inside the manager module
-    monkeypatch.setattr("src.manager.time.sleep", fake_sleep)
-
-    caplog.set_level(logging.WARNING)
-    cfg = DummyConfig()
-    cfg.max_parallel_downloads = 11
-    cfg.aria2c_connections = 10
-    cfg.playlists = []
-
-    m = PlaylistManager(cfg, debug=False)
-    m.run()
-
-    assert slept["called"] is True
-    assert any("may overload your network" in rec.getMessage() for rec in caplog.records)

tests/test_playlist_manager_run_behaviour.py

@@ -1,23 +0,0 @@
-import logging
-from src.manager import PlaylistManager
-from tests.dummy_config import DummyConfig
-
-
-def test_run_with_prune_disabled():
-    logging.basicConfig(level=logging.INFO, format="%(levelname)s:%(message)s")
-    cfg = DummyConfig()
-    cfg.playlists = [{"url": None, "save_path": "tests/tmp_test", "archive": "archive.txt"}]
-    m = PlaylistManager(cfg, debug=False)
-    # should complete without raising
-    m.run()
-
-
-def test_run_with_prune_enabled_non_interactive():
-    logging.basicConfig(level=logging.INFO, format="%(levelname)s:%(message)s")
-    cfg = DummyConfig()
-    cfg.playlists = [{"url": None, "save_path": "tests/tmp_test", "archive": "archive.txt"}]
-    cfg.prune = True
-    cfg.non_interactive = True
-    m = PlaylistManager(cfg, debug=False)
-    # should complete without raising
-    m.run()

tests/test_renumber_and_cleanup.py

@@ -1,78 +0,0 @@
-from pathlib import Path
-
-from src.downloader import PlaylistDownloader
-from tests.dummy_config import DummyConfig
-
-
-def touch(p: Path):
-    p.parent.mkdir(parents=True, exist_ok=True)
-    p.write_text("x")
-
-
-def test_renumber_audio_and_cleanup(tmp_path, monkeypatch):
-    cfg = DummyConfig()
-    playlist = {"url": "FAKE", "save_path": str(tmp_path)}
-    dl = PlaylistDownloader(cfg, playlist, 0)
-    # set download mode to audio and create only audio files
-    dl.download_mode = "audio"
-
-    entries = [
-        {"id": "ID1", "title": "First Song"},
-        {"id": "ID2", "title": "Second Song"},
-    ]
-
-    a1 = tmp_path / "audio" / "oldname First Song.mp3"
-    a2 = tmp_path / "audio" / "zzz Second Song.mp3"
-    touch(a1)
-    touch(a2)
-
-    # On Windows os.rename may fail when target exists; use os.replace to allow
-    # overwrite semantics for the duration of this test.
-    import os as _os
-
-    monkeypatch.setattr(Path, "rename", lambda self, target: _os.replace(self, target))
-    dl.renumber_all_tracks(entries)
-
-    audio_files = list((tmp_path / "audio").glob("*.mp3"))
-    # On some platforms the renaming logic may overwrite targets; assert at least
-    # one audio file was produced and that its name contains one of the titles.
-    assert audio_files
-    assert any("First Song" in f.name or "Second Song" in f.name for f in audio_files)
-
-    # Now test cleanup_removed_tracks: create a stray file not in entries
-    stray = tmp_path / "audio" / "999 - NotInPlaylist.mp3"
-    touch(stray)
-    # ensure prune=False -> no deletion
-    dl.prune = False
-    dl.cleanup_removed_tracks(entries)
-    assert stray.exists()
-
-    # Now enable prune and non_interactive so deletion occurs without input
-    dl.prune = True
-    dl.non_interactive = True
-    dl.cleanup_removed_tracks(entries)
-    assert not stray.exists()
-
-
-def test_renumber_video(tmp_path, monkeypatch):
-    cfg = DummyConfig()
-    playlist = {"url": "FAKE", "save_path": str(tmp_path)}
-    dl = PlaylistDownloader(cfg, playlist, 0)
-    dl.download_mode = "video"
-
-    entries = [
-        {"id": "ID1", "title": "Alpha"},
-        {"id": "ID2", "title": "Beta"},
-    ]
-
-    v1 = tmp_path / "video" / "something Alpha.mp4"
-    v2 = tmp_path / "video" / "something Beta.mp4"
-    touch(v1)
-    touch(v2)
-
-    import os as _os
-    monkeypatch.setattr(Path, "rename", lambda self, target: _os.replace(self, target))
-    dl.renumber_all_tracks(entries)
-    video_files = list((tmp_path / "video").glob("*.mp4"))
-    assert video_files
-    assert any("Alpha" in f.name or "Beta" in f.name for f in video_files)

tests/test_reorder_and_delete.py

@@ -0,0 +1,45 @@
+from __future__ import annotations
+
+from pathlib import Path
+
+from app.core.models import PlaylistItem, SyncAction, SyncActionType
+from app.core.sync.executor import ActionExecutor
+from app.core.sync.reorder import safe_multi_rename
+
+
+def test_safe_multi_rename_swaps_files(tmp_path: Path):
+    a = tmp_path / "0001 - A.mp4"
+    b = tmp_path / "0002 - B.mp4"
+    a.write_text("A", encoding="utf-8")
+    b.write_text("B", encoding="utf-8")
+
+    safe_multi_rename([(a, b), (b, a)])
+
+    assert (tmp_path / "0001 - A.mp4").read_text(encoding="utf-8") == "B"
+    assert (tmp_path / "0002 - B.mp4").read_text(encoding="utf-8") == "A"
+
+
+def test_executor_deletes_to_recycle(tmp_path: Path):
+    class StubDB:
+        def clear_file_state(self, playlist_id: str, video_id: str) -> None:
+            return None
+
+    executor = ActionExecutor(StubDB())  # type: ignore[arg-type]
+
+    save_root = tmp_path / "downloads"
+    audio_root = save_root / "audio"
+    video_root = save_root / "video"
+    audio_root.mkdir(parents=True, exist_ok=True)
+    video_root.mkdir(parents=True, exist_ok=True)
+
+    victim = audio_root / "0001 - X.mp3"
+    victim.write_text("x", encoding="utf-8")
+
+    item = PlaylistItem(playlist_id="p", video_id="v", title="t", playlist_index=1, local_filename=victim.name, downloaded=True)
+    action = SyncAction(SyncActionType.DELETE, item=item, from_name=victim.name)
+
+    executor._apply_deletions([action], audio_root, video_root, {"url": "p"})  # type: ignore[attr-defined]
+
+    assert not victim.exists()
+    recycled = save_root / ".recycle" / "audio" / victim.name
+    assert recycled.exists()

tests/test_settings_default_config.py

@@ -0,0 +1,39 @@
+from __future__ import annotations
+
+import json
+import os
+
+from app.config.settings import Settings
+
+
+def test_settings_creates_root_config_if_missing(tmp_path, monkeypatch):
+    monkeypatch.chdir(tmp_path)
+
+    cfg_path = tmp_path / "config" / "yt-playlist-config.json"
+    assert not cfg_path.exists()
+
+    settings = Settings()
+    assert settings.path == cfg_path.resolve()
+    assert cfg_path.exists()
+
+    data = json.loads(cfg_path.read_text(encoding="utf-8"))
+    assert "playlists" in data
+    assert data.get("ffmpeg_path") == ("./bin/ffmpeg.exe" if os.name == "nt" else "./bin/ffmpeg")
+    assert data["playlists"][0].get("download_mode") == "video"
+    assert data["playlists"][0].get("max_download_quality") == "1080p"
+    assert data["playlists"][0].get("save_path") == "./downloads"
+
+
+def test_settings_reads_config_from_default_location(tmp_path, monkeypatch):
+    monkeypatch.chdir(tmp_path)
+
+    cfg_path = tmp_path / "config" / "yt-playlist-config.json"
+    cfg_path.parent.mkdir(parents=True, exist_ok=True)
+    cfg_path.write_text(json.dumps({"playlists": [{"url": "X"}]}), encoding="utf-8")
+
+    settings = Settings()
+    assert settings.path == cfg_path.resolve()
+    assert settings.playlists and settings.playlists[0]["url"] == "X"
+    assert settings.playlists[0]["download_mode"] == "video"
+    assert settings.playlists[0]["max_download_quality"] == "1080p"
+    assert settings.playlists[0]["save_path"] == "./downloads"

yt-playlist-main.py

@@ -1,17 +0,0 @@
-from ytplaylist import main
-
-
-if __name__ == "__main__":
-    # Keep working directory consistent with original script behaviour
-    import os
-    import sys
-
-    os.chdir(os.path.dirname(os.path.abspath(sys.argv[0])))
-    # Ensure UTF-8 on Windows
-    if sys.platform.startswith("win"):
-        try:
-            sys.stdout.reconfigure(encoding="utf-8")  # type: ignore
-        except Exception:
-            pass
-
-    main()

ytpl-sync-entry.py

@@ -0,0 +1,7 @@
+from __future__ import annotations
+
+from app.gui.main import main
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())