name: Performance Benchmarks

on:
  push:
    branches: [main, develop]
  pull_request:
    branches: [main, develop]
  schedule:
    # Run daily at 2 AM UTC
    - cron: '0 2 * * *'
  workflow_dispatch:

jobs:
  benchmark:
    runs-on: ubuntu-latest
    timeout-minutes: 30

    strategy:
      matrix:
        node-version: [18.x, 20.x]

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

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

      - name: Install dependencies
        run: npm ci
        working-directory: packages/agentic-synth

      - name: Build project
        run: npm run build
        working-directory: packages/agentic-synth

      - name: Run benchmarks
        run: npm run benchmark:ci
        working-directory: packages/agentic-synth
        env:
          GEMINI_API_KEY: ${{ secrets.GEMINI_API_KEY }}
          ANTHROPIC_API_KEY: ${{ secrets.ANTHROPIC_API_KEY }}
          NODE_OPTIONS: '--max-old-space-size=4096'
        continue-on-error: true

      - name: Upload performance report
        uses: actions/upload-artifact@v4
        if: always()
        with:
          name: performance-report-node-${{ matrix.node-version }}
          path: packages/agentic-synth/benchmarks/performance-report.md
          retention-days: 30

      - name: Upload performance data
        uses: actions/upload-artifact@v4
        if: always()
        with:
          name: performance-data-node-${{ matrix.node-version }}
          path: packages/agentic-synth/benchmarks/performance-data.json
          retention-days: 90

      - name: Comment PR with results
        if: github.event_name == 'pull_request'
        uses: actions/github-script@v7
        with:
          script: |
            const fs = require('fs');
            const reportPath = 'packages/agentic-synth/benchmarks/performance-report.md';

            if (fs.existsSync(reportPath)) {
              const report = fs.readFileSync(reportPath, 'utf8');

              github.rest.issues.createComment({
                issue_number: context.issue.number,
                owner: context.repo.owner,
                repo: context.repo.repo,
                body: `## Performance Benchmark Results (Node ${{ matrix.node-version }})\n\n${report}`
              });
            }

      - name: Check for regressions
        run: |
          if [ -f "benchmarks/performance-data.json" ]; then
            node scripts/check-regressions.js
          fi
        working-directory: packages/agentic-synth

  compare:
    runs-on: ubuntu-latest
    needs: benchmark
    if: github.event_name == 'pull_request'

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

      - name: Download artifacts
        uses: actions/download-artifact@v4
        with:
          pattern: performance-data-*
          path: benchmarks/

      - name: Compare performance
        run: |
          echo "Comparing performance across Node versions..."
          # Add comparison script here
          ls -la benchmarks/

  notify:
    runs-on: ubuntu-latest
    needs: benchmark
    if: failure() && github.ref == 'refs/heads/main'

    steps:
      - name: Notify on regression
        uses: actions/github-script@v7
        with:
          script: |
            github.rest.issues.create({
              owner: context.repo.owner,
              repo: context.repo.repo,
              title: '⚠️ Performance Regression Detected',
              body: `Performance benchmarks failed on main branch.\n\nWorkflow: ${context.workflow}\nRun: ${context.runId}`,
              labels: ['performance', 'regression']
            });