name: Publish Docker image

on:
  workflow_dispatch:
    inputs:
      phanpy_version:
        description: Target Phanpy version
        required: true
        type: string
        default: latest
  schedule:
    - cron: "0 */4 * * *"

env:
  REGISTRY: ghcr.io
  IMAGE_NAME: ${{ github.repository }}
  UPSTREAM: cheeaun/phanpy

jobs:
  build_and_push_to_registry:
    name: "Build and Push to Registry: phanpy ${{ inputs.phanpy_version }}"
    runs-on: ubuntu-latest
    permissions:
      contents: read
      packages: write
    steps:
      - name: Check version
        id: version
        run: |
          echo "### Status" >> ${GITHUB_STEP_SUMMARY}

          tag="${{ inputs.logLevel || 'latest' }}"

          if [[ "${tag}" == "latest" ]]; then
            tag=$(curl -s https://api.github.com/repos/${UPSTREAM}/releases/latest \
                  | jq --raw-output '.tag_name')
          fi

          echo "value=${tag}" >> ${GITHUB_OUTPUT}
          echo " - Tag: ${tag}" >> ${GITHUB_STEP_SUMMARY}
      - uses: warjiang/setup-skopeo@main
      - name: Check if tag needs_update
        id: tag_check
        run: |
          if skopeo inspect docker://${REGISTRY}/${IMAGE_NAME}:${{ steps.version.outputs.value }}; then
            echo ":green_square: We are up to date!" >> ${GITHUB_STEP_SUMMARY}
            echo "needs_update=false" >> ${GITHUB_OUTPUT}
          else
            echo ":red_square: **Update required!**" >> ${GITHUB_STEP_SUMMARY}
            echo "needs_update=true" >> ${GITHUB_OUTPUT}
          fi
      - name: Checkout repository
        if: ${{ steps.tag_check.outputs.needs_update == 'true' }}
        uses: actions/checkout@v4
      - name: Log in to the Container registry
        if: ${{ steps.tag_check.outputs.needs_update == 'true' }}
        uses: docker/login-action@v3
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}
      - name: Extract metadata for Docker
        if: ${{ steps.tag_check.outputs.needs_update == 'true' }}
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
          tags: |
            ${{ steps.version.outputs.value }}
            latest
      - name: Build and push Docker image
        if: ${{ steps.tag_check.outputs.needs_update == 'true' }}
        uses: docker/build-push-action@v5
        with:
          context: .
          push: true
          build-args: |
            VERSION=${{ steps.version.outputs.value }}
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}