name: Backend Tests

on:
  push:
    branches: [ main, develop ]
    paths:
      - 'backend/**'
      - '.github/workflows/backend-tests.yml'
  pull_request:
    branches: [ main, develop ]
    paths:
      - 'backend/**'
      - '.github/workflows/backend-tests.yml'

jobs:
  test:
    runs-on: ubuntu-latest
    
    strategy:
      matrix:
        python-version: ['3.10', '3.11', '3.12']
    
    services:
      postgres:
        image: postgres:15
        env:
          POSTGRES_USER: test_user
          POSTGRES_PASSWORD: test_password
          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

    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 }}
          cache: 'pip'
          cache-dependency-path: 'backend/requirements/*.txt'

      - name: Install dependencies
        working-directory: ./backend
        run: |
          python -m pip install --upgrade pip
          pip install -r requirements/base.txt
          pip install -r requirements/dev.txt

      - name: Lint with flake8 (if installed)
        working-directory: ./backend
        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
          # Exit-zero treats all errors as warnings
          flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
        continue-on-error: true

      - name: Run tests with pytest
        working-directory: ./backend
        env:
          DATABASE_URL: postgresql://test_user:test_password@localhost:5432/test_db
          CELERY_BROKER_URL: redis://localhost:6379/0
          CELERY_RESULT_BACKEND: redis://localhost:6379/0
          SECRET_KEY: test-secret-key
          JWT_SECRET_KEY: test-jwt-secret-key
          FLASK_ENV: testing
        run: |
          pytest --cov=app --cov-report=xml --cov-report=html --cov-report=term

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

      - name: Upload coverage HTML as artifact
        uses: actions/upload-artifact@v3
        with:
          name: coverage-report-python-${{ matrix.python-version }}
          path: backend/htmlcov/
          retention-days: 7

      - name: Check coverage thresholds
        working-directory: ./backend
        run: |
          coverage report --fail-under=80

  security-scan:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout code
        uses: actions/checkout@v4

      - name: Set up Python
        uses: actions/setup-python@v4
        with:
          python-version: '3.11'

      - name: Install dependencies
        working-directory: ./backend
        run: |
          python -m pip install --upgrade pip
          pip install bandit safety

      - name: Run Bandit security linter
        working-directory: ./backend
        run: |
          bandit -r app -f json -o bandit-report.json || true
        continue-on-error: true

      - name: Check for known security vulnerabilities
        working-directory: ./backend
        run: |
          safety check --json --output safety-report.json || true
        continue-on-error: true

      - name: Upload security reports
        uses: actions/upload-artifact@v3
        with:
          name: security-reports
          path: |
            backend/bandit-report.json
            backend/safety-report.json