name: Build Arch Packages (Enhanced)

on:
  push:
    branches: [ main, master ]
  pull_request:
    branches: [ main, master ]

jobs:
  detect-changes:
    runs-on: ubuntu-latest
    outputs:
      packages: ${{ steps.changes.outputs.packages }}
      matrix: ${{ steps.changes.outputs.matrix }}
      total: ${{ steps.changes.outputs.total }}
    steps:
    - uses: actions/checkout@v4
      with:
        fetch-depth: 0
    
    - name: Detect Changed Packages
      id: changes
      run: |
        # Alle verfügbaren Pakete finden
        all_packages=$(find . -name "PKGBUILD" -type f | xargs dirname | sed 's|^\./||' | sort)
        
        # Bei Push: nur geänderte Pakete
        if [ "${{ github.event_name }}" = "push" ] && [ "${{ github.event.before }}" != "0000000000000000000000000000000000000000" ]; then
          changed_files=$(git diff --name-only ${{ github.event.before }}..${{ github.sha }})
          changed_packages=""
          
          for pkg in $all_packages; do
            if echo "$changed_files" | grep -q "^$pkg/"; then
              changed_packages="$changed_packages $pkg"
            fi
          done
          
          packages_to_build=$(echo $changed_packages | tr ' ' '\n' | sort | uniq)
        else
          # Bei PR oder initial commit: alle Pakete
          packages_to_build="$all_packages"
        fi
        
        # JSON Arrays erstellen
        if [ -n "$packages_to_build" ]; then
          packages_json=$(echo "$packages_to_build" | jq -R -s -c 'split("\n") | map(select(length > 0))')
          matrix_json=$(echo "$packages_to_build" | jq -R -s -c 'split("\n") | map(select(length > 0)) | map({package: ., name: (. | split("/") | last)})')
          total=$(echo "$packages_to_build" | wc -l)
        else
          packages_json="[]"
          matrix_json="[]"
          total="0"
        fi
        
        echo "packages=$packages_json" >> $GITHUB_OUTPUT
        echo "matrix=$matrix_json" >> $GITHUB_OUTPUT
        echo "total=$total" >> $GITHUB_OUTPUT
        
        echo "📦 Found $total package(s) to build:"
        echo "$packages_to_build"

  build-packages:
    needs: detect-changes
    if: needs.detect-changes.outputs.packages != '[]'
    strategy:
      matrix:
        include: ${{ fromJson(needs.detect-changes.outputs.matrix) }}
      fail-fast: false
    
    runs-on: ubuntu-latest
    container:
      image: archlinux:latest
    
    steps:
    - name: Setup Build Environment
      run: |
        echo "🔧 Setting up build environment..."
        pacman -Syu --noconfirm
        pacman -S --noconfirm base-devel git nodejs npm namcap pacman-contrib sudo curl
        
        # Builder user
        useradd -m -G wheel builder
        echo 'builder ALL=(ALL) NOPASSWD: ALL' >> /etc/sudoers
        echo 'builder:builder' | chpasswd
    
    - name: Checkout Repository
      uses: actions/checkout@v4
    
    - name: Package Information
      run: |
        echo "📦 Building package: ${{ matrix.package }}"
        cd "${{ matrix.package }}"
        
        # PKGBUILD info extrahieren
        source PKGBUILD
        echo "Package name: $pkgname"
        echo "Version: $pkgver-$pkgrel"
        echo "Description: $pkgdesc"
        
        chown -R builder:builder /workspace/cseyfferth/repo
    
    - name: Validate PKGBUILD
      run: |
        cd "${{ matrix.package }}"
        echo "🔍 Validating PKGBUILD..."
        sudo -u builder namcap PKGBUILD
        
        # Dependency check
        sudo -u builder makepkg --printsrcinfo > .SRCINFO
        cat .SRCINFO
    
    - name: Build Package
      run: |
        cd "${{ matrix.package }}"
        echo "🔨 Building package..."
        
        # Build mit verbose output
        sudo -u builder makepkg -s --noconfirm --needed -L
        
        # Zeige gebaute Pakete
        echo "✅ Successfully built packages:"
        ls -la *.pkg.tar.zst
    
    - name: Test Package
      run: |
        cd "${{ matrix.package }}"
        echo "🧪 Testing built packages..."
        
        for pkg in *.pkg.tar.zst; do
          if [ -f "$pkg" ]; then
            echo "Testing $pkg..."
            sudo -u builder namcap "$pkg" || echo "⚠️ namcap warnings for $pkg"
            
            # Package info
            sudo -u builder pacman -Qip "$pkg"
          fi
        done
    
    - name: Upload Artifacts
      uses: actions/upload-artifact@v4
      with:
        name: ${{ matrix.name }}-${{ github.sha }}
        path: |
          ${{ matrix.package }}/*.pkg.tar.zst
          ${{ matrix.package }}/.SRCINFO
        retention-days: 30