name: Docker Build and Push

on:
  push:
    branches: [ "main", "master" ]
    paths-ignore:
      - 'docs/**'
      - '**.md'
  pull_request:
    branches: [ "main", "master" ]
    paths-ignore:
      - 'docs/**'
      - '**.md'

env:
  REGISTRY: ghcr.io
  # Use message-nest to match release workflow naming, or use ${{ github.repository }} for default
  IMAGE_NAME: message-nest

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

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

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3

      - name: Log in to the Container registry
        if: github.event_name != 'pull_request'
        uses: docker/login-action@v3
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Extract metadata (tags, labels) for Docker
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ${{ env.REGISTRY }}/${{ github.repository_owner }}/${{ env.IMAGE_NAME }}
          tags: |
            type=raw,value=latest,enable=${{ github.ref == 'refs/heads/main' || github.ref == 'refs/heads/master' }}
            type=ref,event=branch
            type=ref,event=pr
            type=sha

      - name: Build and push Docker image
        uses: docker/build-push-action@v5
        with:
          context: .
          file: ./Dockerfile
          push: ${{ github.event_name != 'pull_request' }}
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          cache-from: type=gha
          cache-to: type=gha,mode=max