name: Build Docker Image for Raspberry Pi

on:
  push:
    branches:
      - main
      - master
      - develop
    tags:
      - 'v*'
  pull_request:
    branches:
      - main
      - master

jobs:
  build-and-push:
    runs-on: ubuntu-latest
    
    steps:
      - name: Checkout code
        uses: actions/checkout@v3

      - name: Set up QEMU
        uses: docker/setup-qemu-action@v2
        with:
          platforms: linux/arm/v6,linux/arm/v7,linux/arm64

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v2

      - name: Prepare image name
        id: image-name
        run: |
          if [ -n "${{ secrets.DOCKER_USERNAME }}" ]; then
            echo "IMAGE_NAME=${{ secrets.DOCKER_USERNAME }}/ha-voltronic-mqtt" >> $GITHUB_OUTPUT
            echo "SHOULD_PUSH=true" >> $GITHUB_OUTPUT
          else
            echo "IMAGE_NAME=local/ha-voltronic-mqtt" >> $GITHUB_OUTPUT
            echo "SHOULD_PUSH=false" >> $GITHUB_OUTPUT
          fi

      - name: Docker meta
        id: meta
        uses: docker/metadata-action@v4
        with:
          images: |
            ${{ steps.image-name.outputs.IMAGE_NAME }}
          tags: |
            type=ref,event=branch
            type=ref,event=pr
            type=semver,pattern={{version}}
            type=semver,pattern={{major}}.{{minor}}
            type=raw,value=latest,enable={{is_default_branch}}

      - name: Login to Docker Hub
        if: github.event_name != 'pull_request' && steps.image-name.outputs.SHOULD_PUSH == 'true'
        uses: docker/login-action@v2
        with:
          username: ${{ secrets.DOCKER_USERNAME }}
          password: ${{ secrets.DOCKER_PASSWORD }}

      - name: Build and push Docker image
        uses: docker/build-push-action@v4
        with:
          context: .
          file: ./Dockerfile.multiarch
          platforms: linux/arm/v6,linux/arm/v7,linux/arm64
          push: ${{ steps.image-name.outputs.SHOULD_PUSH == 'true' && github.event_name != 'pull_request' }}
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          build-args: |
            BUILD_DATE=${{ github.event.repository.updated_at }}
            VERSION=${{ steps.meta.outputs.version }}
            VCS_REF=${{ github.sha }}

      - name: Image digest
        run: echo ${{ steps.meta.outputs.tags }}