name: Build and Push Docker Image

on:
  push:
  workflow_dispatch:

jobs:
  build-and-push:
    runs-on: ubuntu-latest
    permissions:
      contents: read
      packages: write

    steps:
      - name: Checkout repository
        uses: actions/checkout@v4

      - name: Log in to Gitea Container Registry
        uses: docker/login-action@v3
        with:
          registry: ${{ gitea.server_url && fromJSON('{}') || '' }}${{ vars.GITEA_HOST || 'git.mein-gateway.de' }}
          username: ${{ gitea.actor }}
          password: ${{ secrets.GITEA_TOKEN }}

      - name: Compute image name and tag
        id: meta
        run: |
          OWNER=$(echo "${{ gitea.repository_owner }}" | tr '[:upper:]' '[:lower:]')
          IMAGE_NAME=$(echo "javadocviewerservice" | tr '[:upper:]' '[:lower:]')
          REGISTRY="${{ vars.GITEA_HOST || 'git.mein-gateway.de' }}"
          FULL_IMAGE="${REGISTRY}/${OWNER}/${IMAGE_NAME}"

          REF="${{ gitea.ref_name }}"
          if [ "${REF}" = "main" ]; then
            TAG="latest"
          else
            TAG=$(echo "${REF}" | tr '[:upper:]' '[:lower:]' | sed 's/[^a-z0-9._-]/-/g')
          fi

          echo "image=${FULL_IMAGE}" >> "$GITHUB_OUTPUT"
          echo "tag=${TAG}" >> "$GITHUB_OUTPUT"
          echo "Image: ${FULL_IMAGE}:${TAG}"

      - name: Build and push Docker image
        uses: docker/build-push-action@v5
        with:
          context: .
          push: true
          tags: ${{ steps.meta.outputs.image }}:${{ steps.meta.outputs.tag }}