name: CI/CD Pipeline

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

env:
  NODE_VERSION: '20.x'
  REGISTRY: ghcr.io
  IMAGE_NAME: ${{ github.repository }}

jobs:
  lint:
    name: Lint
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4

      - name: Setup Node.js
        uses: actions/setup-node@v4
        with:
          node-version: ${{ env.NODE_VERSION }}
          cache: 'npm'

      - name: Install dependencies
        run: npm install

      - name: Run ESLint
        run: npm run lint:check

      - name: Type check
        run: npx tsc --noEmit

  test:
    name: Test
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4

      - name: Setup Node.js
        uses: actions/setup-node@v4
        with:
          node-version: ${{ env.NODE_VERSION }}
          cache: 'npm'

      - name: Install dependencies
        run: npm install

      - name: Run unit tests
        run: npm test --if-present || echo "No test script found"

      - name: Upload coverage reports
        uses: codecov/codecov-action@v4
        if: always()
        with:
          token: ${{ secrets.CODECOV_TOKEN }}
          files: ./coverage/coverage-final.json
          flags: unittests
          fail_ci_if_error: false

  build:
    name: Build
    runs-on: ubuntu-latest
    needs: [lint, test]
    steps:
      - uses: actions/checkout@v4

      - name: Setup Node.js
        uses: actions/setup-node@v4
        with:
          node-version: ${{ env.NODE_VERSION }}
          cache: 'npm'

      - name: Install dependencies
        run: npm install

      - name: Prepare build directories
        run: |
          mkdir -p /tmp/dist
          mkdir -p dist

      - name: Build application
        run: npm run build

      - name: Verify build output
        run: |
          if [ ! -f "dist/index.html" ]; then
            echo "Error: Build failed - index.html not found"
            exit 1
          fi
          echo "Build successful - all artifacts generated"
          ls -lah dist/

      - name: Upload build artifacts
        uses: actions/upload-artifact@v4
        with:
          name: dist
          path: dist/
          retention-days: 7

  e2e-tests:
    name: E2E Tests
    runs-on: ubuntu-latest
    needs: build
    timeout-minutes: 30
    steps:
      - uses: actions/checkout@v4

      - name: Setup Node.js
        uses: actions/setup-node@v4
        with:
          node-version: ${{ env.NODE_VERSION }}
          cache: 'npm'

      - name: Install dependencies
        run: npm install

      - name: Install Playwright browsers
        run: npx playwright install --with-deps chromium

      - name: Download build artifacts
        uses: actions/download-artifact@v4
        with:
          name: dist
          path: dist/

      - name: Check if E2E tests exist
        id: check-tests
        run: |
          if [ -d "e2e" ] && [ "$(ls -A e2e/*.spec.ts 2>/dev/null)" ]; then
            echo "has_tests=true" >> $GITHUB_OUTPUT
          else
            echo "has_tests=false" >> $GITHUB_OUTPUT
          fi

      - name: Run E2E tests
        if: steps.check-tests.outputs.has_tests == 'true'
        run: npx playwright test
        timeout-minutes: 20

      - name: Skip E2E tests
        if: steps.check-tests.outputs.has_tests == 'false'
        run: echo "No E2E tests configured - skipping"

      - name: Upload test results
        uses: actions/upload-artifact@v4
        if: always() && steps.check-tests.outputs.has_tests == 'true'
        with:
          name: playwright-report
          path: playwright-report/
          retention-days: 7

  security-scan:
    name: Security Scan
    runs-on: ubuntu-latest
    permissions:
      contents: read
      security-events: write
      actions: read
    steps:
      - uses: actions/checkout@v4
      
      - name: Setup Node.js
        uses: actions/setup-node@v4
        with:
          node-version: ${{ env.NODE_VERSION }}
          cache: 'npm'
      
      - name: Install dependencies
        run: npm install

      - name: Run npm audit
        run: npm audit --audit-level=moderate || true

      - name: Run Trivy vulnerability scanner
        uses: aquasecurity/trivy-action@master
        with:
          scan-type: 'fs'
          scan-ref: '.'
          format: 'sarif'
          output: 'trivy-results.sarif'

      - name: Upload Trivy results to GitHub Security
        uses: github/codeql-action/upload-sarif@v4
        if: always()
        with:
          sarif_file: 'trivy-results.sarif'

  docker-build:
    name: Build Docker Image
    runs-on: ubuntu-latest
    needs: [lint, test, build]
    if: github.event_name == 'push' && (github.ref == 'refs/heads/main' || github.ref == 'refs/heads/develop')
    permissions:
      contents: read
      packages: write
    steps:
      - uses: actions/checkout@v4

      - name: Set up QEMU
        uses: docker/setup-qemu-action@v3
        with:
          platforms: linux/amd64,linux/arm64

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3
        with:
          platforms: linux/amd64,linux/arm64

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

      - name: Build and push Docker image
        uses: docker/build-push-action@v5
        with:
          context: .
          push: true
          platforms: linux/amd64,linux/arm64
          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: [docker-build]
    if: github.ref == 'refs/heads/develop'
    environment:
      name: staging
      url: https://staging.codeforge.example.com
    steps:
      - uses: actions/checkout@v4

      - name: Deploy to staging
        run: |
          echo "Deploying to staging environment..."
          echo "Image: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:develop-${{ github.sha }}"

      - name: Notify deployment
        uses: 8398a7/action-slack@v3
        if: always() && env.SLACK_WEBHOOK_URL != ''
        with:
          status: ${{ job.status }}
          text: 'Staging deployment ${{ job.status }}'
        env:
          SLACK_WEBHOOK_URL: ${{ secrets.SLACK_WEBHOOK_URL }}

  deploy-production:
    name: Deploy to Production
    runs-on: ubuntu-latest
    needs: [docker-build, e2e-tests]
    if: github.ref == 'refs/heads/main'
    environment:
      name: production
      url: https://codeforge.example.com
    steps:
      - uses: actions/checkout@v4

      - name: Deploy to production
        run: |
          echo "Deploying to production environment..."
          echo "Image: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:main-${{ github.sha }}"

      - name: Notify deployment
        uses: 8398a7/action-slack@v3
        if: always() && env.SLACK_WEBHOOK_URL != ''
        with:
          status: ${{ job.status }}
          text: 'Production deployment ${{ job.status }}'
        env:
          SLACK_WEBHOOK_URL: ${{ secrets.SLACK_WEBHOOK_URL }}