name: Build & Push Docker Image

on:
  push:
    branches: [main]
  workflow_dispatch:

env:
  REGISTRY: ghcr.io
  IMAGE_NAME: ${{ github.repository }}   # e.g. owner/repo → ghcr.io/owner/repo

jobs:
  build-and-push:
    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 GitHub Container Registry
        uses: docker/login-action@v3
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Extract Docker metadata
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
          tags: |
            type=raw,value=latest,enable={{is_default_branch}}
            type=sha,prefix=sha-

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

      # Optional: trigger xCloud to pull & redeploy
      # Add XCLOUD_DEPLOY_WEBHOOK to GitHub repo secrets
      - name: Trigger xCloud deploy
        if: ${{ secrets.XCLOUD_DEPLOY_WEBHOOK != '' }}
        run: |
          curl -s -X POST "${{ secrets.XCLOUD_DEPLOY_WEBHOOK }}" \
            -H "Content-Type: application/json" \
            -d '{"ref": "${{ github.sha }}"}'

# ─────────────────────────────────────────────
# Multi-service variant (uncomment if needed)
# ─────────────────────────────────────────────
# jobs:
#   build-and-push:
#     strategy:
#       matrix:
#         include:
#           - service: app
#             dockerfile: Dockerfile
#             image_suffix: app
#           - service: worker
#             dockerfile: Dockerfile.worker
#             image_suffix: worker
#     steps:
#       - name: Build and push
#         uses: docker/build-push-action@v5
#         with:
#           context: .
#           file: ${{ matrix.dockerfile }}
#           tags: ghcr.io/${{ github.repository }}-${{ matrix.image_suffix }}:latest