name: CI/CD Pipeline

on:
  push:
    branches: [ main, develop ]
  pull_request:
    branches: [ main ]
  release:
    types: [ published ]

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

jobs:
  test:
    name: Run Tests
    runs-on: ubuntu-latest
    strategy:
      matrix:
        python-version: ['3.9', '3.10', '3.11']

    steps:
    - name: Checkout code
      uses: actions/checkout@v6

    - name: Set up Python ${{ matrix.python-version }}
      uses: actions/setup-python@v6
      with:
        python-version: ${{ matrix.python-version }}

    - name: Cache Python dependencies
      uses: actions/cache@v5
      with:
        path: ~/.cache/pip
        key: ${{ runner.os }}-pip-${{ hashFiles('**/requirements.txt') }}
        restore-keys: |
          ${{ runner.os }}-pip-

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

    - name: Lint with flake8
      run: |
        pip install flake8
        # Stop the build if there are Python syntax errors or undefined names
        flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics
        # Treat all errors as warnings
        flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics

    - name: Test application startup
      run: |
        # Start server in background with CI mode (skips indexing)
        timeout 30 python run.py --host 127.0.0.1 --port 8001 --skip-index &
        SERVER_PID=$!

        # Wait for server to be ready (max 20 seconds)
        echo "Waiting for server to start..."
        for i in {1..20}; do
          if curl -f http://127.0.0.1:8001/api/stats 2>/dev/null; then
            echo "Server is ready!"
            break
          fi
          if [ $i -eq 20 ]; then
            echo "Server failed to start within 20 seconds"
            exit 1
          fi
          echo "Attempt $i/20..."
          sleep 1
        done

        # Clean up
        kill $SERVER_PID 2>/dev/null || true

    - name: Test Docker build
      run: |
        docker build -t test-image:latest .

  security:
    name: Security Scan
    runs-on: ubuntu-latest
    needs: test
    # Don't fail the workflow if Trivy finds issues
    continue-on-error: true
    permissions:
      contents: read
      security-events: write
      actions: read

    steps:
    - name: Checkout code
      uses: actions/checkout@v6

    - name: Run Trivy vulnerability scanner
      uses: aquasecurity/trivy-action@master
      with:
        scan-type: 'fs'
        scan-ref: '.'
        format: 'sarif'
        output: 'trivy-results.sarif'
        severity: 'CRITICAL,HIGH'
        ignore-unfixed: true
        trivyignores: '.trivyignore'
        trivy-config: 'trivy.yaml'
        exit-code: '0'  # Report only mode - won't fail the build
        vuln-type: 'os,library'
        skip-dirs: 'workflows,database,workflows_backup*,__pycache__,venv,.venv'

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

  build:
    name: Build and Push Docker Image
    runs-on: ubuntu-latest
    needs: [test, security]
    if: github.event_name != 'pull_request'
    permissions:
      contents: read
      packages: write
      id-token: write

    steps:
    - name: Checkout code
      uses: actions/checkout@v6

    - 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=semver,pattern={{version}}
          type=semver,pattern={{major}}.{{minor}}
          type=sha,prefix=sha-

    - name: Build and push Docker image
      uses: docker/build-push-action@v6
      with:
        context: .
        platforms: linux/amd64,linux/arm64
        push: true
        tags: ${{ steps.meta.outputs.tags }}
        labels: ${{ steps.meta.outputs.labels }}
        cache-from: type=gha
        cache-to: type=gha,mode=max

  deploy-staging:
    name: Deploy to Staging
    runs-on: ubuntu-latest
    needs: build
    if: github.ref == 'refs/heads/develop'
    environment: staging

    steps:
    - name: Checkout code
      uses: actions/checkout@v6

    - name: Deploy to staging
      run: |
        echo "Deploying to staging environment..."
        # Add your staging deployment commands here
        # Example: kubectl, docker-compose, or cloud provider CLI commands

  deploy-production:
    name: Deploy to Production
    runs-on: ubuntu-latest
    needs: build
    if: github.ref == 'refs/heads/main' || github.event_name == 'release'
    environment: production

    steps:
    - name: Checkout code
      uses: actions/checkout@v6

    - name: Deploy to production
      run: |
        echo "Deploying to production environment..."
        # Add your production deployment commands here
        # Example: kubectl, docker-compose, or cloud provider CLI commands

  notification:
    name: Send Notifications
    runs-on: ubuntu-latest
    needs: [deploy-staging, deploy-production]
    if: always() && (needs.deploy-staging.result != 'skipped' || needs.deploy-production.result != 'skipped')

    steps:
    - name: Notify deployment status
      run: |
        if [[ "${{ needs.deploy-staging.result }}" == "success" || "${{ needs.deploy-production.result }}" == "success" ]]; then
          echo "Deployment successful!"
        else
          echo "Deployment failed!"
        fi