name: Build and Publish Docker Image

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

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

jobs:
  build-and-test:
    runs-on: ubuntu-latest
    
    steps:
    - name: Checkout repository
      uses: actions/checkout@v4

    - name: Install dependencies
      run: |
        sudo apt-get update
        sudo apt-get install -y \
          build-essential \
          meson \
          ninja-build \
          pkg-config \
          libboost-all-dev \
          libgtest-dev \
          libgmock-dev

    - name: Setup build directory
      run: meson setup builddir --buildtype=release

    - name: Build project
      run: meson compile -C builddir

    - name: Run tests
      run: meson test -C builddir

    - name: Upload test results
      uses: actions/upload-artifact@v4
      if: always()
      with:
        name: test-results
        path: builddir/meson-logs/testlog.txt

  build-and-push-image:
    runs-on: ubuntu-latest
    needs: build-and-test
    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 Container Registry
      if: github.event_name != 'pull_request'
      uses: docker/login-action@v3
      with:
        registry: ${{ env.REGISTRY }}
        username: ${{ github.actor }}
        password: ${{ secrets.GITHUB_TOKEN }}

    - name: Extract metadata (tags, labels) for Docker
      id: meta
      uses: docker/metadata-action@v5
      with:
        images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
        tags: |
          type=ref,event=branch
          type=ref,event=pr
          type=semver,pattern={{version}}
          type=semver,pattern={{major}}.{{minor}}
          type=semver,pattern={{major}}
          type=sha,prefix={{branch}}-
          type=raw,value=latest,enable={{is_default_branch}}

    - name: Build and push Docker image
      uses: docker/build-push-action@v5
      with:
        context: .
        platforms: linux/amd64,linux/arm64
        push: ${{ github.event_name != 'pull_request' }}
        tags: ${{ steps.meta.outputs.tags }}
        labels: ${{ steps.meta.outputs.labels }}
        cache-from: type=gha
        cache-to: type=gha,mode=max

    - name: Generate artifact attestation
      if: github.event_name != 'pull_request'
      uses: actions/attest-build-provenance@v1
      with:
        subject-name: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
        subject-digest: ${{ steps.build.outputs.digest }}
        push-to-registry: true

  security-scan:
    runs-on: ubuntu-latest
    needs: build-and-push-image
    if: github.event_name != 'pull_request'
    permissions:
      contents: read
      security-events: write

    steps:
    - name: Run Trivy vulnerability scanner
      uses: aquasecurity/trivy-action@master
      with:
        image-ref: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:latest
        format: 'sarif'
        output: 'trivy-results.sarif'

    - name: Upload Trivy scan results to GitHub Security tab
      uses: github/codeql-action/upload-sarif@v3
      with:
        sarif_file: 'trivy-results.sarif'