name: Build and Push Docker Image

on:
  push:
    branches: [main]
    tags: ["v*"]
  pull_request:
    branches: [main]

# Set permissions for GITHUB_TOKEN
permissions:
  contents: read
  packages: write

jobs:
  build:
    runs-on: ubuntu-latest

    steps:
      # Step 1: Check out the repository code
      - name: Checkout
        uses: actions/checkout@v4

      # Step 2: Set up Docker Buildx for advanced features
      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3

      # Step 3: Log in to GitHub Container Registry
      - name: Log in to GHCR
        uses: docker/login-action@v3
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      # Step 4: Generate tags and labels from Git metadata
      - name: Extract metadata
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ghcr.io/${{ github.repository }}
          tags: |
            # Tag with branch name
            type=ref,event=branch
            # Tag with PR number
            type=ref,event=pr
            # Tag with semver from git tag
            type=semver,pattern={{version}}
            type=semver,pattern={{major}}.{{minor}}
            # Tag with short SHA
            type=sha,prefix=

      # Step 5: Build and push the Docker image
      - name: Build and push
        uses: docker/build-push-action@v5
        with:
          context: .
          # Only push on main branch and tags, not PRs
          push: ${{ github.event_name != 'pull_request' }}
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          # Enable build cache for faster builds
          cache-from: type=gha
          cache-to: type=gha,mode=max