name: Build and Push Docker Images

on:
  release:
    types: [published]

# Ensure only one workflow run per branch at a time; cancel any in-progress runs on new push 
concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true

jobs:
  build:
    runs-on: ubuntu-latest
    env:
      COMMIT_SHA: ${{ github.sha }}  # Used to tag images with short commit SHA

    strategy:
      matrix:
        service: 
          - "dograh-api|api/Dockerfile|."
          - "dograh-ui|ui/Dockerfile|."

    steps:
      - name: Checkout repository
        uses: actions/checkout@v4
        with:
          submodules: true  # Only for version check, not used in build

      # Pipecat version check removed - now using local submodule

      - name: Set up QEMU  # Enables cross-platform builds (e.g., arm64)
        uses: docker/setup-qemu-action@v3

      - name: Set up Docker Buildx  # Enables multi-arch and advanced Docker builds
        uses: docker/setup-buildx-action@v3

      - name: Log in to DockerHub
        uses: docker/login-action@v3
        with:
          username: ${{ secrets.DOCKERHUB_USERNAME }}
          password: ${{ secrets.DOCKERHUB_TOKEN }}

      - name: Log in to GHCR
        uses: docker/login-action@v3
        with:
          registry: ghcr.io
          username: ${{ secrets.GHCR_USERNAME }}
          password: ${{ secrets.GHCR_TOKEN }}

      - name: Set build variables
        id: build-vars
        run: |
          # Parse matrix entry and set variables early (before build)
          SERVICE="${{ matrix.service }}"
          IMAGE_NAME=$(echo "$SERVICE" | cut -d '|' -f1)
          SHORT_SHA=${COMMIT_SHA::8}
          
          # Export for use in subsequent steps
          echo "image_name=${IMAGE_NAME}" >> $GITHUB_OUTPUT
          echo "short_sha=${SHORT_SHA}" >> $GITHUB_OUTPUT
          echo "service=${SERVICE}" >> $GITHUB_OUTPUT
      
      - name: Build and Push ${{ matrix.service }}
        id: docker-build
        run: |
          # Parse matrix entry into individual variables
          SERVICE="${{ matrix.service }}"
          IMAGE_NAME=$(echo "$SERVICE" | cut -d '|' -f1)
          DOCKERFILE=$(echo "$SERVICE" | cut -d '|' -f2)
          CONTEXT=$(echo "$SERVICE" | cut -d '|' -f3)
          SHORT_SHA=${COMMIT_SHA::8}

          echo "Building and pushing image: $IMAGE_NAME"
          echo "Dockerfile: $DOCKERFILE"
          echo "Context: $CONTEXT"
          echo "Commit SHA: $SHORT_SHA"
          
          # Export tags for Slack notification
          echo "image_name=${IMAGE_NAME}" >> $GITHUB_OUTPUT
          echo "dockerhub_tag=${{ secrets.DOCKERHUB_USERNAME }}/${IMAGE_NAME}:${SHORT_SHA}" >> $GITHUB_OUTPUT
          echo "ghcr_tag=ghcr.io/${{ secrets.GHCR_USERNAME }}/${IMAGE_NAME}:${SHORT_SHA}" >> $GITHUB_OUTPUT
          echo "short_sha=${SHORT_SHA}" >> $GITHUB_OUTPUT

          # Build and push multi-arch Docker image to DockerHub and GHCR
          docker buildx build \
            -f "$DOCKERFILE" \
            --platform linux/amd64,linux/arm64 \
            --tag ${{ secrets.DOCKERHUB_USERNAME }}/$IMAGE_NAME:$SHORT_SHA \
            --tag ${{ secrets.DOCKERHUB_USERNAME }}/$IMAGE_NAME:latest \
            --tag ghcr.io/${{ secrets.GHCR_USERNAME }}/$IMAGE_NAME:$SHORT_SHA \
            --tag ghcr.io/${{ secrets.GHCR_USERNAME }}/$IMAGE_NAME:latest \
            --push "$CONTEXT"
      
      # Success notification
      - name: Send Slack notification - Success
        if: success()
        uses: slackapi/slack-github-action@v1.26.0
        env:
          SLACK_WEBHOOK_URL: ${{ secrets.SLACK_WEBHOOK_URL }}
        with:
          payload: |
            {
              "text": "✅ Docker Build Successful - ${{ steps.build-vars.outputs.image_name }} (${{ steps.build-vars.outputs.short_sha }}) on ${{ github.ref_name }} by ${{ github.actor }}"
            }
      
      # Failure notification
      - name: Send Slack notification - Failure
        if: failure()
        uses: slackapi/slack-github-action@v1.26.0
        env:
          SLACK_WEBHOOK_URL: ${{ secrets.SLACK_WEBHOOK_URL }}
        with:
          payload: |
            {
              "text": "❌ Docker Build Failed - ${{ steps.build-vars.outputs.image_name }} (${{ steps.build-vars.outputs.short_sha }}) on ${{ github.ref_name }} by ${{ github.actor }} - <${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}|View Logs>"
            }