name: Create Release

on:
  push:
    branches:
      - main
    paths:
      - 'frontend/package.json'
      - 'backend/package.json'

jobs:
  check-version-change:
    runs-on: ubuntu-latest
    outputs:
      version_changed: ${{ steps.check.outputs.changed }}
      new_version: ${{ steps.check.outputs.version }}
    
    steps:
      - name: Checkout code
        uses: actions/checkout@v4
        with:
          fetch-depth: 2

      - name: Check if version changed
        id: check
        run: |
          # Get current versions
          FRONTEND_VERSION=$(node -p "require('./frontend/package.json').version")
          BACKEND_VERSION=$(node -p "require('./backend/package.json').version")
          
          # Get previous versions
          git checkout HEAD~1
          PREV_FRONTEND_VERSION=$(node -p "require('./frontend/package.json').version" 2>/dev/null || echo "0.0.0")
          PREV_BACKEND_VERSION=$(node -p "require('./backend/package.json').version" 2>/dev/null || echo "0.0.0")
          
          # Check if versions changed
          if [[ "$FRONTEND_VERSION" != "$PREV_FRONTEND_VERSION" ]] || [[ "$BACKEND_VERSION" != "$PREV_BACKEND_VERSION" ]]; then
            echo "changed=true" >> $GITHUB_OUTPUT
            echo "version=$FRONTEND_VERSION" >> $GITHUB_OUTPUT
          else
            echo "changed=false" >> $GITHUB_OUTPUT
          fi

  create-release:
    needs: check-version-change
    if: needs.check-version-change.outputs.version_changed == 'true'
    runs-on: ubuntu-latest
    permissions:
      contents: write
      
    steps:
      - name: Checkout code
        uses: actions/checkout@v4

      - name: Generate Changelog
        id: changelog
        run: |
          # Get commits since last tag
          LAST_TAG=$(git describe --tags --abbrev=0 2>/dev/null || echo "")
          if [[ -z "$LAST_TAG" ]]; then
            COMMITS=$(git log --oneline)
          else
            COMMITS=$(git log ${LAST_TAG}..HEAD --oneline)
          fi
          
          # Format changelog
          echo "## What's Changed" > changelog.md
          echo "" >> changelog.md
          
          # Group commits by type
          echo "### Features" >> changelog.md
          echo "$COMMITS" | grep -E "^[a-f0-9]+ feat:" | sed 's/^[a-f0-9]+ /- /' >> changelog.md || echo "*No new features*" >> changelog.md
          
          echo "" >> changelog.md
          echo "### Bug Fixes" >> changelog.md
          echo "$COMMITS" | grep -E "^[a-f0-9]+ fix:" | sed 's/^[a-f0-9]+ /- /' >> changelog.md || echo "*No bug fixes*" >> changelog.md
          
          echo "" >> changelog.md
          echo "### Other Changes" >> changelog.md
          echo "$COMMITS" | grep -vE "^[a-f0-9]+ (feat|fix):" | sed 's/^[a-f0-9]+ /- /' >> changelog.md || echo "*No other changes*" >> changelog.md
          
          # Save changelog
          echo "changelog<<EOF" >> $GITHUB_OUTPUT
          cat changelog.md >> $GITHUB_OUTPUT
          echo "EOF" >> $GITHUB_OUTPUT

      - name: Create Release
        uses: softprops/action-gh-release@v1
        with:
          tag_name: v${{ needs.check-version-change.outputs.new_version }}
          name: Release v${{ needs.check-version-change.outputs.new_version }}
          body: |
            ## PicPeak v${{ needs.check-version-change.outputs.new_version }}
            
            ${{ steps.changelog.outputs.changelog }}
            
            ### Docker Images
            
            To use this release with Docker:
            ```bash
            docker pull ghcr.io/${{ github.repository }}/frontend:v${{ needs.check-version-change.outputs.new_version }}
            docker pull ghcr.io/${{ github.repository }}/backend:v${{ needs.check-version-change.outputs.new_version }}
            ```
            
            Or use the `latest` tag for the most recent version.
          draft: false
          prerelease: false
          generate_release_notes: true