name: Build and Push Backend Docker Image

on:
  push:
    branches:
      - master
    tags:
      - 'v*.*.*'
  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 GitHub Container Registry
        uses: docker/login-action@v3
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Extract metadata (tags, labels) for Docker
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ghcr.io/${{ github.repository_owner }}/${{ github.event.repository.name }}/backend
          tags: |
            # set latest tag for default branch
            type=raw,value=latest,enable=${{ github.ref == format('refs/heads/{0}', 'main') }}
            # tag event 'refs/tags/v1.0.0' will generate 'v1.0.0'
            type=ref,event=tag
            # branch event 'refs/heads/main' will generate 'main'
            type=ref,event=branch
            # sha
            type=sha

      - name: Build and push Docker image
        uses: docker/build-push-action@v6
        with:
          context: .
          file: ./Dockerfile
          push: ${{ github.event_name != 'pull_request' }}
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          build-args: |
            VERSION=${{ steps.meta.outputs.version }} # This will be the git tag (e.g. v1.0.0) or branch name or sha