name: .NET CI/CD Pipeline

on:
  push:
    branches: [ main, feature/*, bugfix/*, refactor/* ]
  pull_request:
    branches: [ main ]

# Environment variables available to all jobs and steps
env:
  DOTNET_VERSION: '9.0.x'
  DOTNET_NOLOGO: true
  DOTNET_CLI_TELEMETRY_OPTOUT: true

jobs:
  build-and-test:
    name: Build and Test
    runs-on: ubuntu-latest
    
    strategy:
      matrix:
        project: [GermanApp]
    
    steps:
    - name: Checkout repository
      uses: actions/checkout@v4
      with:
        fetch-depth: 0

    - name: Setup .NET SDK
      uses: actions/setup-dotnet@v4
      with:
        dotnet-version: ${{ env.DOTNET_VERSION }}

    - name: Restore dependencies
      run: dotnet restore GermanApp/GermanApp.csproj

    - name: Build backend
      run: dotnet build GermanApp/GermanApp.csproj --no-restore --configuration Release

    - name: Run unit tests
      run: dotnet test Tests/GermanApp.Tests.Unit.csproj --no-build --configuration Release --verbosity normal

    - name: Run integration tests
      run: dotnet test Tests/GermanApp.Tests.Integration.csproj --no-build --configuration Release --verbosity normal

  docker-build:
    name: Docker Build
    runs-on: ubuntu-latest
    needs: build-and-test
    
    steps:
    - name: Checkout repository
      uses: actions/checkout@v4

    - name: Set up Docker Buildx
      uses: docker/setup-buildx-action@v3

    - name: Log in to Docker Hub
      uses: docker/login-action@v3
      with:
        username: ${{ secrets.DOCKER_HUB_USERNAME }}
        password: ${{ secrets.DOCKER_HUB_TOKEN }}
      if: github.ref == 'refs/heads/main'

    - name: Build and push backend Docker image
      uses: docker/build-push-action@v5
      with:
        context: .
        file: GermanApp/Dockerfile
        push: ${{ github.ref == 'refs/heads/main' }}
        tags: ${{ secrets.DOCKER_HUB_USERNAME }}/deutschlernen-backend:latest,${{ secrets.DOCKER_HUB_USERNAME }}/deutschlernen-backend:${{ github.sha }}
        cache-from: type=gha
        cache-to: type=gha,mode=max

  deploy:
    name: Deploy to Production
    runs-on: ubuntu-latest
    needs: docker-build
    if: github.ref == 'refs/heads/main'
    
    steps:
    - name: Checkout repository
      uses: actions/checkout@v4

    - name: Deploy with Docker Compose
      run: |
        echo "Deployment step - would deploy using docker-compose or Kubernetes"
        echo "This is a placeholder - actual deployment configuration needed"
        # Uncomment and configure for actual deployment:
        # docker-compose -f docker-compose.prod.yml up -d
        # or use kubectl, etc.