name: Build Arch Packages

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 }}
    steps:
    - name: Checkout Repository
      uses: actions/checkout@v4
      with:
        fetch-depth: 0
    
    - name: Debug Repository Structure
      run: |
        echo "📁 Repository structure:"
        find . -name "PKGBUILD" -type f | head -20
        echo ""
        ls -la
    
    - name: Detect Changed Packages
      id: changes
      run: |
        echo "🔍 Detecting packages..."
        
        # Alle verfügbaren Pakete finden
        all_packages=$(find . -name "PKGBUILD" -type f | xargs dirname | sed 's|^\./||' | sort)
        
        echo "Found packages:"
        echo "$all_packages"
        
        if [ -z "$all_packages" ]; then
          echo "❌ No PKGBUILD files found!"
          echo "packages=[]" >> $GITHUB_OUTPUT
          echo "matrix=[]" >> $GITHUB_OUTPUT
          exit 0
        fi
        
        # Bei Push: nur geänderte Pakete (vereinfacht)
        if [ "${{ github.event_name }}" = "push" ] && [ "${{ github.event.before }}" != "0000000000000000000000000000000000000000" ]; then
          changed_files=$(git diff --name-only ${{ github.event.before }}..${{ github.sha }})
          echo "Changed files: $changed_files"
          
          packages_to_build=""
          for pkg in $all_packages; do
            if echo "$changed_files" | grep -q "^$pkg/"; then
              packages_to_build="$packages_to_build$pkg"$'\n'
            fi
          done
          
          # Falls keine Änderungen in Paketen, trotzdem alle bauen (für ersten Test)
          if [ -z "$packages_to_build" ]; then
            packages_to_build="$all_packages"
          fi
        else
          packages_to_build="$all_packages"
        fi
        
        # Leere Zeilen entfernen
        packages_to_build=$(echo "$packages_to_build" | grep -v '^$' | sort | uniq)
        
        echo "Packages to build:"
        echo "$packages_to_build"
        
        # JSON Arrays erstellen
        if [ -n "$packages_to_build" ]; then
          # Korrekte JSON-Erstellung
          packages_json="["
          matrix_json="["
          first=true
          
          while IFS= read -r pkg; do
            if [ -n "$pkg" ]; then
              if [ "$first" = true ]; then
                first=false
              else
                packages_json="$packages_json,"
                matrix_json="$matrix_json,"
              fi
              packages_json="$packages_json\"$pkg\""
              matrix_json="$matrix_json{\"package\":\"$pkg\"}"
            fi
          done <<< "$packages_to_build"
          
          packages_json="$packages_json]"
          matrix_json="$matrix_json]"
        else
          packages_json="[]"
          matrix_json="[]"
        fi
        
        echo "Final JSON:"
        echo "packages=$packages_json"
        echo "matrix=$matrix_json"
        
        echo "packages=$packages_json" >> $GITHUB_OUTPUT
        echo "matrix=$matrix_json" >> $GITHUB_OUTPUT

  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
        useradd -m -G wheel builder
        echo 'builder ALL=(ALL) NOPASSWD: ALL' >> /etc/sudoers
    
    - name: Checkout Repository  
      uses: actions/checkout@v4
    
    - name: Debug Matrix Variables
      run: |
        echo "🐛 Debug Matrix Variables:"
        echo "matrix.package: '${{ matrix.package }}'"
        echo "Current directory: $(pwd)"
        echo "Directory contents:"
        ls -la
        
        if [ -n "${{ matrix.package }}" ]; then
          echo "Target package directory: ${{ matrix.package }}"
          if [ -d "${{ matrix.package }}" ]; then
            echo "✅ Directory exists"
            ls -la "${{ matrix.package }}"
          else
            echo "❌ Directory does not exist"
          fi
        else
          echo "❌ matrix.package is empty!"
          exit 1
        fi
    
    - name: Package Information
      run: |
        package_dir="${{ matrix.package }}"
        
        if [ -z "$package_dir" ]; then
          echo "❌ Package directory is empty"
          exit 1
        fi
        
        if [ ! -d "$package_dir" ]; then
          echo "❌ Package directory '$package_dir' does not exist"
          exit 1
        fi
        
        echo "📦 Building package: $package_dir"
        cd "$package_dir"
        
        if [ ! -f "PKGBUILD" ]; then
          echo "❌ No PKGBUILD found in $package_dir"
          exit 1
        fi
        
        # PKGBUILD info
        source PKGBUILD
        echo "Package name: $pkgname"
        echo "Version: $pkgver-$pkgrel"
        echo "Description: $pkgdesc"
        
        # Set ownership
        chown -R builder:builder /workspace/cseyfferth/repo
    
    - name: Validate PKGBUILD
      run: |
        cd "${{ matrix.package }}"
        echo "🔍 Validating PKGBUILD..."
        sudo -u builder namcap PKGBUILD
    
    - name: Build Package
      run: |
        cd "${{ matrix.package }}"
        echo "🔨 Building package..."
        sudo -u builder makepkg -s --noconfirm --needed
        
        echo "✅ Built packages:"
        ls -la *.pkg.tar.zst
    
    - name: Test Package
      run: |
        cd "${{ matrix.package }}"
        echo "🧪 Testing packages..."
        for pkg in *.pkg.tar.zst; do
          if [ -f "$pkg" ]; then
            echo "Testing $pkg..."
            sudo -u builder namcap "$pkg" || true
          fi
        done
    
    - name: Upload Artifacts
      uses: actions/upload-artifact@v4
      with:
        name: ${{ matrix.package }}-package
        path: ${{ matrix.package }}/*.pkg.tar.zst
        retention-days: 30