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: Compute image name and tag
        id: meta
        run: |
          REGISTRY=$(echo "${{ github.server_url }}" | sed 's|https\?://||')
          OWNER=$(echo "${{ github.repository_owner }}" | tr '[:upper:]' '[:lower:]')
          ACTOR=$(echo "${{ github.actor }}" | tr '[:upper:]' '[:lower:]')
          IMAGE_NAME="javadocviewerservice"
          FULL_IMAGE="${REGISTRY}/${OWNER}/${IMAGE_NAME}"

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

          echo "Registry:  ${REGISTRY}"
          echo "Actor:     ${ACTOR}"
          echo "Image:     ${FULL_IMAGE}:${TAG}"

          echo "registry=${REGISTRY}" >> "$GITHUB_OUTPUT"
          echo "actor=${ACTOR}" >> "$GITHUB_OUTPUT"
          echo "image=${FULL_IMAGE}" >> "$GITHUB_OUTPUT"
          echo "tag=${TAG}" >> "$GITHUB_OUTPUT"

      - name: Log in to Gitea Container Registry
        run: echo "${{ secrets.GITEA_TOKEN }}" | docker login "${{ steps.meta.outputs.registry }}" -u "${{ steps.meta.outputs.actor }}" --password-stdin

      - 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 }}