name: Docker Test Build

on:
  pull_request:
    branches: [ "master" ]
  workflow_dispatch:

env:
  REGISTRY: docker.io
  IMAGE_NAME: ${{ github.repository }}

jobs:
  test-build:
    runs-on: ubuntu-latest
    permissions:
      contents: read

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

      # Setup QEMU for multi-platform builds
      - name: Set up QEMU
        uses: docker/setup-qemu-action@v3

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

      # Build Docker image (without pushing)
      - name: Build Docker image
        id: build
        uses: docker/build-push-action@v6
        with:
          context: .
          push: false
          tags: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:test
          platforms: linux/amd64
          cache-from: type=gha
          cache-to: type=gha,mode=max
          build-args: |
            BUILDKIT_INLINE_CACHE=1

      # Test the built image
      - name: Test Docker image
        run: |
          docker run --rm ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:test python test_docker.py

      # Show image size
      - name: Show image size
        run: |
          docker images ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:test --format "table {{.Repository}}\t{{.Tag}}\t{{.Size}}"

      # Clean up test image
      - name: Clean up test image
        if: always()
        run: |
          docker rmi ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:test || true