name: Continuous Integration

on:
  push:
    branches: [ main, develop, 'feature/*', 'feat/*', 'hotfix/*' ]
  pull_request:
    branches: [ main, develop ]
  workflow_dispatch:

env:
  PYTHON_VERSION: '3.11'
  NODE_VERSION: '18'
  REGISTRY: ghcr.io
  IMAGE_NAME: ${{ github.repository }}

jobs:
  # Code Quality and Security Checks
  code-quality:
    name: Code Quality & Security
    runs-on: ubuntu-latest
    steps:
    - name: Checkout code
      uses: actions/checkout@v4
      with:
        fetch-depth: 0

    - name: Set up Python
      uses: actions/setup-python@v5
      with:
        python-version: ${{ env.PYTHON_VERSION }}
        cache: 'pip'

    - name: Install dependencies
      run: |
        python -m pip install --upgrade pip
        pip install -r requirements.txt
        pip install black flake8 mypy bandit safety

    - name: Code formatting check (Black)
      run: black --check --diff src/ tests/

    - name: Linting (Flake8)
      run: flake8 src/ tests/ --max-line-length=88 --extend-ignore=E203,W503

    - name: Type checking (MyPy)
      run: mypy src/ --ignore-missing-imports

    - name: Security scan (Bandit)
      run: bandit -r src/ -f json -o bandit-report.json
      continue-on-error: true

    - name: Dependency vulnerability scan (Safety)
      run: safety check --json --output safety-report.json
      continue-on-error: true

    - name: Upload security reports
      uses: actions/upload-artifact@v4
      if: always()
      with:
        name: security-reports
        path: |
          bandit-report.json
          safety-report.json

  # Unit and Integration Tests
  test:
    name: Tests
    runs-on: ubuntu-latest
    strategy:
      matrix:
        python-version: ['3.10', '3.11', '3.12']
    services:
      postgres:
        image: postgres:15
        env:
          POSTGRES_PASSWORD: postgres
          POSTGRES_DB: test_wifi_densepose
        options: >-
          --health-cmd pg_isready
          --health-interval 10s
          --health-timeout 5s
          --health-retries 5
        ports:
          - 5432:5432

      redis:
        image: redis:7
        options: >-
          --health-cmd "redis-cli ping"
          --health-interval 10s
          --health-timeout 5s
          --health-retries 5
        ports:
          - 6379:6379

    steps:
    - name: Checkout code
      uses: actions/checkout@v4

    - name: Set up Python ${{ matrix.python-version }}
      uses: actions/setup-python@v5
      with:
        python-version: ${{ matrix.python-version }}
        cache: 'pip'

    - name: Install dependencies
      run: |
        python -m pip install --upgrade pip
        pip install -r requirements.txt
        pip install pytest-cov pytest-xdist

    - name: Run unit tests
      env:
        DATABASE_URL: postgresql://postgres:postgres@localhost:5432/test_wifi_densepose
        REDIS_URL: redis://localhost:6379/0
        ENVIRONMENT: test
      run: |
        pytest tests/unit/ -v --cov=src --cov-report=xml --cov-report=html --junitxml=junit.xml

    - name: Run integration tests
      env:
        DATABASE_URL: postgresql://postgres:postgres@localhost:5432/test_wifi_densepose
        REDIS_URL: redis://localhost:6379/0
        ENVIRONMENT: test
      run: |
        pytest tests/integration/ -v --junitxml=integration-junit.xml

    - name: Upload coverage reports
      uses: codecov/codecov-action@v4
      with:
        file: ./coverage.xml
        flags: unittests
        name: codecov-umbrella

    - name: Upload test results
      uses: actions/upload-artifact@v4
      if: always()
      with:
        name: test-results-${{ matrix.python-version }}
        path: |
          junit.xml
          integration-junit.xml
          htmlcov/

  # Performance and Load Tests
  performance-test:
    name: Performance Tests
    runs-on: ubuntu-latest
    needs: [test]
    if: github.event_name == 'push' && github.ref == 'refs/heads/main'
    steps:
    - name: Checkout code
      uses: actions/checkout@v4

    - name: Set up Python
      uses: actions/setup-python@v5
      with:
        python-version: ${{ env.PYTHON_VERSION }}
        cache: 'pip'

    - name: Install dependencies
      run: |
        python -m pip install --upgrade pip
        pip install -r requirements.txt
        pip install locust

    - name: Start application
      run: |
        uvicorn src.api.main:app --host 0.0.0.0 --port 8000 &
        sleep 10

    - name: Run performance tests
      run: |
        locust -f tests/performance/locustfile.py --headless --users 50 --spawn-rate 5 --run-time 60s --host http://localhost:8000

    - name: Upload performance results
      uses: actions/upload-artifact@v4
      with:
        name: performance-results
        path: locust_report.html

  # Docker Build and Test
  docker-build:
    name: Docker Build & Test
    runs-on: ubuntu-latest
    needs: [code-quality, test]
    steps:
    - name: Checkout code
      uses: actions/checkout@v4

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

    - name: Log in to Container Registry
      uses: docker/login-action@v3
      with:
        registry: ${{ env.REGISTRY }}
        username: ${{ github.actor }}
        password: ${{ secrets.GITHUB_TOKEN }}

    - name: Extract metadata
      id: meta
      uses: docker/metadata-action@v5
      with:
        images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
        tags: |
          type=ref,event=branch
          type=ref,event=pr
          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: .
        target: production
        push: true
        tags: ${{ steps.meta.outputs.tags }}
        labels: ${{ steps.meta.outputs.labels }}
        cache-from: type=gha
        cache-to: type=gha,mode=max
        platforms: linux/amd64,linux/arm64

    - name: Test Docker image
      run: |
        docker run --rm -d --name test-container -p 8000:8000 ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ github.sha }}
        sleep 10
        curl -f http://localhost:8000/health || exit 1
        docker stop test-container

    - name: Run container security scan
      uses: aquasecurity/trivy-action@master
      with:
        image-ref: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ github.sha }}
        format: 'sarif'
        output: 'trivy-results.sarif'

    - name: Upload Trivy scan results
      uses: github/codeql-action/upload-sarif@v3
      if: always()
      with:
        sarif_file: 'trivy-results.sarif'

  # API Documentation
  docs:
    name: API Documentation
    runs-on: ubuntu-latest
    needs: [docker-build]
    if: github.ref == 'refs/heads/main'
    steps:
    - name: Checkout code
      uses: actions/checkout@v4

    - name: Set up Python
      uses: actions/setup-python@v5
      with:
        python-version: ${{ env.PYTHON_VERSION }}
        cache: 'pip'

    - name: Install dependencies
      run: |
        python -m pip install --upgrade pip
        pip install -r requirements.txt

    - name: Generate OpenAPI spec
      run: |
        python -c "
        from src.api.main import app
        import json
        with open('openapi.json', 'w') as f:
            json.dump(app.openapi(), f, indent=2)
        "

    - name: Deploy to GitHub Pages
      uses: peaceiris/actions-gh-pages@v4
      with:
        github_token: ${{ secrets.GITHUB_TOKEN }}
        publish_dir: ./docs
        destination_dir: api-docs

  # Notification
  notify:
    name: Notify
    runs-on: ubuntu-latest
    needs: [code-quality, test, performance-test, docker-build, docs]
    if: always()
    steps:
    - name: Notify Slack on success
      if: ${{ secrets.SLACK_WEBHOOK_URL != '' && needs.code-quality.result == 'success' && needs.test.result == 'success' && needs.docker-build.result == 'success' }}
      uses: 8398a7/action-slack@v3
      with:
        status: success
        channel: '#ci-cd'
        text: '✅ CI pipeline completed successfully for ${{ github.ref }}'
      env:
        SLACK_WEBHOOK_URL: ${{ secrets.SLACK_WEBHOOK_URL }}

    - name: Notify Slack on failure
      if: ${{ secrets.SLACK_WEBHOOK_URL != '' && (needs.code-quality.result == 'failure' || needs.test.result == 'failure' || needs.docker-build.result == 'failure') }}
      uses: 8398a7/action-slack@v3
      with:
        status: failure
        channel: '#ci-cd'
        text: '❌ CI pipeline failed for ${{ github.ref }}'
      env:
        SLACK_WEBHOOK_URL: ${{ secrets.SLACK_WEBHOOK_URL }}

    - name: Create GitHub Release
      if: github.ref == 'refs/heads/main' && needs.docker-build.result == 'success'
      uses: softprops/action-gh-release@v2
      with:
        tag_name: v${{ github.run_number }}
        name: Release v${{ github.run_number }}
        body: |
          Automated release from CI pipeline

          **Changes:**
          ${{ github.event.head_commit.message }}

          **Docker Image:**
          `${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ github.sha }}`
        draft: false
        prerelease: false