name: CI/CD Pipeline

on:
  push:
    branches: [ main, develop ]
  pull_request:
    branches: [ main, develop ]
  workflow_dispatch:

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

jobs:
  test:
    name: Run Tests
    runs-on: ubuntu-latest

    services:
      postgres:
        image: postgres:15
        env:
          POSTGRES_PASSWORD: postgres
          POSTGRES_DB: test_db
        options: >-
          --health-cmd pg_isready
          --health-interval 10s
          --health-timeout 5s
          --health-retries 5
        ports:
          - 5432:5432
      redis:
        image: redis:7-alpine
        options: >-
          --health-cmd "redis-cli ping"
          --health-interval 10s
          --health-timeout 5s
          --health-retries 5
        ports:
          - 6379:6379

    strategy:
      matrix:
        python-version: [3.9, 3.10, 3.11]

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

    - name: Set up Python ${{ matrix.python-version }}
      uses: actions/setup-python@v4
      with:
        python-version: ${{ matrix.python-version }}

    - name: Cache pip packages
      uses: actions/cache@v3
      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 -r requirements-dev.txt
        pip install coveralls

    - name: Set up environment
      run: |
        cp backend/.env.example backend/.env
        cp frontend/.env.example frontend/.env
        chmod +x backend/manage.py

    - name: Run database migrations
      run: |
        cd backend
        python manage.py migrate
      env:
        DATABASE_URL: postgres://postgres:postgres@localhost:5432/test_db
        REDIS_URL: redis://localhost:6379/0

    - name: Run backend tests
      run: |
        cd backend
        python manage.py test --verbosity=2 --cov=. --cov-report=xml --cov-report=term-missing
      env:
        DATABASE_URL: postgres://postgres:postgres@localhost:5432/test_db
        REDIS_URL: redis://localhost:6379/0
        SECRET_KEY: test-secret-key-for-ci

    - name: Run frontend tests
      run: |
        cd frontend
        npm install
        npm run test
        npm run build

    - name: Run integration tests
      run: |
        cd backend
        python manage.py test tests.integration --verbosity=2
      env:
        DATABASE_URL: postgres://postgres:postgres@localhost:5432/test_db
        REDIS_URL: redis://localhost:6379/0

    - name: Upload coverage to Codecov
      uses: codecov/codecov-action@v3
      with:
        file: ./coverage.xml
        flags: unittests
        name: codecov-umbrella

  security:
    name: Security Scan
    runs-on: ubuntu-latest
    needs: test

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

    - name: Run Bandit Security Scan
      uses: PyCQA/bandit-action@v1
      with:
        path: backend
        config: .bandit

    - name: Run Safety Check
      run: |
        pip install safety
        safety check -r requirements.txt

    - name: Run Semgrep Security Scan
      uses: returntocorp/semgrep-action@v1
      with:
        config: p/security-audit
        paths: backend

  code-quality:
    name: Code Quality
    runs-on: ubuntu-latest
    needs: test

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

    - name: Set up Python
      uses: actions/setup-python@v4
      with:
        python-version: 3.10

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

    - name: Run Black formatting check
      run: |
        black --check backend/

    - name: Run Flake8 linting
      run: |
        flake8 backend/

    - name: Run isort import sorting check
      run: |
        isort --check-only backend/

    - name: Run MyPy type checking
      run: |
        mypy backend/ --ignore-missing-imports

    - name: Run ESLint for frontend
      run: |
        cd frontend
        npm install
        npm run lint

  build-and-push:
    name: Build and Push Images
    runs-on: ubuntu-latest
    needs: [test, security, code-quality]
    if: github.ref == 'refs/heads/main'

    permissions:
      contents: read
      packages: write

    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 backend image
      uses: docker/build-push-action@v5
      with:
        context: backend
        platforms: linux/amd64,linux/arm64
        push: true
        tags: ${{ steps.meta.outputs.tags }}-backend
        labels: ${{ steps.meta.outputs.labels }}
        cache-from: type=gha
        cache-to: type=gha,mode=max

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

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

    environment:
      name: staging
      url: https://staging.malaysian-sme-platform.com

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

    - name: Deploy to staging
      uses: appleboy/ssh-action@v1.0.0
      with:
        host: ${{ secrets.STAGING_HOST }}
        username: ${{ secrets.STAGING_USER }}
        key: ${{ secrets.STAGING_SSH_KEY }}
        script: |
          cd /opt/malaysian-sme-platform
          docker-compose -f docker-compose.staging.yml pull
          docker-compose -f docker-compose.staging.yml up -d
          docker system prune -f

    - name: Run health checks
      run: |
        curl -f https://staging.malaysian-sme-platform.com/health/ || exit 1
        curl -f https://staging.malaysian-sme-platform.com/api/health/ || exit 1

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

    environment:
      name: production
      url: https://api.malaysian-sme-platform.com

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

    - name: Create GitHub deployment
      uses: actions/create-deployment@v1
      id: deployment
      with:
        token: ${{ secrets.GITHUB_TOKEN }}
        environment: production

    - name: Deploy to production
      uses: appleboy/ssh-action@v1.0.0
      with:
        host: ${{ secrets.PRODUCTION_HOST }}
        username: ${{ secrets.PRODUCTION_USER }}
        key: ${{ secrets.PRODUCTION_SSH_KEY }}
        script: |
          # Create backup before deployment
          ./scripts/backup-database.sh

          # Deploy with zero downtime
          cd /opt/malaysian-sme-platform

          # Pull new images
          docker-compose -f docker-compose.prod.yml pull

          # Perform rolling update
          docker-compose -f docker-compose.prod.yml up -d --no-deps backend
          sleep 30
          docker-compose -f docker-compose.prod.yml up -d --no-deps frontend

          # Run database migrations
          docker-compose -f docker-compose.prod.yml exec -T backend python manage.py migrate

          # Collect static files
          docker-compose -f docker-compose.prod.yml exec -T backend python manage.py collectstatic --noinput

          # Clean up
          docker system prune -f

    - name: Run production health checks
      run: |
        curl -f https://api.malaysian-sme-platform.com/health/ || exit 1
        curl -f https://api.malaysian-sme-platform.com/api/health/ || exit 1
        curl -f https://app.malaysian-sme-platform.com/ || exit 1

    - name: Update deployment status
      uses: actions/update-deployment@v1
      if: always()
      with:
        token: ${{ secrets.GITHUB_TOKEN }}
        deployment_id: ${{ steps.deployment.outputs.deployment_id }}
        state: ${{ job.status }}

  performance-test:
    name: Performance Testing
    runs-on: ubuntu-latest
    needs: staging-deploy
    if: github.ref == 'refs/heads/develop'

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

    - name: Set up k6
      uses: grafana/k6-action@v0.3.0
      with:
        filename: tests/performance/load-test.js

    - name: Run performance tests
      run: |
        cd tests/performance
        k6 run load-test.js --env STAGING_URL=https://staging.malaysian-sme-platform.com

    - name: Upload performance results
      uses: actions/upload-artifact@v3
      with:
        name: performance-results
        path: tests/performance/results/

  notify:
    name: Notify Team
    runs-on: ubuntu-latest
    needs: [production-deploy, performance-test]
    if: always() && (github.ref == 'refs/heads/main' || github.ref == 'refs/heads/develop')

    steps:
    - name: Send Slack notification
      uses: 8398a7/action-slack@v3
      with:
        status: ${{ job.status }}
        channel: '#deployments'
        webhook_url: ${{ secrets.SLACK_WEBHOOK }}
      env:
        SLACK_WEBHOOK_URL: ${{ secrets.SLACK_WEBHOOK }}

    - name: Send email notification
      uses: dawidd6/action-send-mail@v3
      with:
        server_address: smtp.gmail.com
        server_port: 465
        username: ${{ secrets.EMAIL_USERNAME }}
        password: ${{ secrets.EMAIL_PASSWORD }}
        subject: "Deployment ${{ job.status }} - ${{ github.repository }}"
        body: |
          Deployment to ${{ github.ref }} completed with status: ${{ job.status }}

          Commit: ${{ github.sha }}
          Author: ${{ github.actor }}

          View logs: https://github.com/${{ github.repository }}/actions/runs/${{ github.run_id }}
        to: devops@malaysian-sme-platform.com
        from: ci-cd@malaysian-sme-platform.com