name: Build and Release Docker Image

on:
  push:
    branches:
      - main
    tags:
      - 'v*'
#on:
#  release:
#    # Or use [published] if you want it to trigger slightly later    
#    types: [created] 


jobs:
  build-and-release:
    name: Build Docker Image
    runs-on: ubuntu-latest

    steps:
      - name: Checkout code
        uses: actions/checkout@v3
        with:
          fetch-depth: 0  # Fetch all history for proper versioning
          persist-credentials: false 

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v2

      - name: Calculate version
        id: version
        run: |
          if [[ $GITHUB_REF == refs/tags/v* ]]; then
            # Use the tag if this is a tag push
            VERSION=${GITHUB_REF#refs/tags/v}
          else
            # For pushes to main, use the last tag + commit count + hash
            VERSION=$(git describe --tags --always --dirty | sed 's/^v//')
            if [[ ! $VERSION =~ ^[0-9]+\.[0-9]+\.[0-9]+ ]]; then
              # If no tag exists, start with 0.1.0 + commit count
              COMMIT_COUNT=$(git rev-list --count HEAD)
              SHORT_HASH=$(git rev-parse --short HEAD)
              VERSION="0.1.0-$COMMIT_COUNT-$SHORT_HASH"
            fi
          fi
          echo "::set-output name=version::$VERSION"
          echo "VERSION=$VERSION" >> $GITHUB_ENV
      - name: Debug Docker Login
        run: |
          echo "Trying to log in to: ${{ secrets.REGISTRY }}"
          docker login ${{ secrets.REGISTRY }} -u ${{ github.repository_owner }} -p ${{ secrets.TOKEN }}


      - name: Login to Gitea Container Registry
        uses: docker/login-action@v2
        with:
          registry: ${{ secrets.REGISTRY }}
          username: ${{ github.repository_owner }}
          password: ${{ secrets.TOKEN }}

      - name: Build and push Docker image
        uses: docker/build-push-action@v4
        with:
          context: .
          push: true
          tags: |
            ${{ secrets.REGISTRY }}/${{ github.repository }}:${{ steps.version.outputs.version }}
            ${{ secrets.REGISTRY }}/${{ github.repository }}:latest

      - name: Save image as tar archive
        run: |
          mkdir -p ./artifacts
          IMAGE_NAME="${{ secrets.REGISTRY }}/${{ github.repository }}:${{ steps.version.outputs.version }}"
          docker pull $IMAGE_NAME
          docker save $IMAGE_NAME -o ./artifacts/docker-image-${{ steps.version.outputs.version }}.tar
          gzip ./artifacts/docker-image-${{ steps.version.outputs.version }}.tar

      - name: Create Release
        id: create_release
        if: github.event_name == 'push' && startsWith(github.ref, 'refs/tags/v')
        uses: actions/create-release@v1
        env:
          GITHUB_TOKEN: ${{ secrets.GITEA_TOKEN }}
        with:
          tag_name: v${{ steps.version.outputs.version }}
          release_name: Release v${{ steps.version.outputs.version }}
          draft: false
          prerelease: false

      - name: Upload Docker image to Release
        if: github.event_name == 'push' && startsWith(github.ref, 'refs/tags/v')
        uses: actions/upload-release-asset@v1
        env:
          GITHUB_TOKEN: ${{ secrets.GITEA_TOKEN }}
        with:
          upload_url: ${{ steps.create_release.outputs.upload_url }}
          asset_path: ./artifacts/docker-image-${{ steps.version.outputs.version }}.tar.gz
          asset_name: docker-image-${{ steps.version.outputs.version }}.tar.gz
          asset_content_type: application/gzip

      - name: Store image locally for all pushes
        if: always()
        run: |
          mkdir -p /var/lib/gitea/data/docker-images/${{ github.repository }}
          cp ./artifacts/docker-image-${{ steps.version.outputs.version }}.tar.gz /var/lib/gitea/data/docker-images/${{ github.repository }}/
          echo "Docker image stored at: /var/lib/gitea/data/docker-images/${{ github.repository }}/docker-image-${{ steps.version.outputs.version }}.tar.gz"
          
          # Create version registry file
          if [ ! -f /var/lib/gitea/data/docker-images/${{ github.repository }}/versions.json ]; then
            echo '{"versions":[]}' > /var/lib/gitea/data/docker-images/${{ github.repository }}/versions.json
          fi
          
          # Update versions registry
          jq --arg version "${{ steps.version.outputs.version }}" \
             --arg date "$(date -u +"%Y-%m-%dT%H:%M:%SZ")" \
             --arg commit "$(git rev-parse HEAD)" \
             '.versions += [{"version": $version, "date": $date, "commit": $commit}]' \
             /var/lib/gitea/data/docker-images/${{ github.repository }}/versions.json > temp.json && \
          mv temp.json /var/lib/gitea/data/docker-images/${{ github.repository }}/versions.json