const fs = require('fs');
const path = require('path');

function generateSimpleReport() {
  const coveragePath = path.join(__dirname, 'coverage/e2e/coverage-data.json');
  
  if (!fs.existsSync(coveragePath)) {
    console.error('Coverage data file not found!');
    return;
  }
  
  const coverageData = JSON.parse(fs.readFileSync(coveragePath, 'utf-8'));
  const outputDir = path.join(__dirname, 'coverage/e2e');
  
  if (!fs.existsSync(outputDir)) {
    fs.mkdirSync(outputDir, { recursive: true });
  }

  let totalEntries = 0;
  let appEntries = 0;
  const fileStats = {};

  console.log('\n=== E2E Coverage Collection Report ===\n');
  console.log('Pages covered:');
  
  const pages = new Set();
  const scripts = new Set();
  
  for (const entry of coverageData) {
    if (!entry.url) continue;
    
    const url = entry.url;
    
    if (url.includes('localhost:3000') || url.includes('_next')) {
      totalEntries++;
      
      const urlObj = new URL(url);
      pages.add(urlObj.pathname);
      
      const scriptUrl = entry.scriptId ? `script-${entry.scriptId}` : 'inline';
      if (!fileStats[scriptUrl]) {
        fileStats[scriptUrl] = { count: 0, sourceSize: 0 };
      }
      fileStats[scriptUrl].count++;
      if (entry.source) {
        fileStats[scriptUrl].sourceSize += entry.source.length;
      }
      
      if (url.includes('novalon-website') || url.includes('/_next/')) {
        appEntries++;
      }
    }
  }

  console.log(`\nTotal JS bundles collected: ${totalEntries}`);
  console.log(`App-specific bundles: ${appEntries}`);
  console.log(`Unique pages visited: ${pages.size}`);
  console.log(`\nPages:`);
  pages.forEach(p => console.log(`  - ${p}`));

  const reportPath = path.join(outputDir, 'coverage-summary.json');
  const report = {
    timestamp: new Date().toISOString(),
    totalEntries,
    appEntries,
    pagesVisited: Array.from(pages),
    fileStats,
  };
  
  fs.writeFileSync(reportPath, JSON.stringify(report, null, 2));
  console.log(`\nReport saved to: ${reportPath}`);
  
  console.log('\n=== Coverage Summary ===');
  console.log(`✓ Playwright successfully collected JS coverage from ${totalEntries} bundles`);
  console.log(`✓ Covered ${pages.size} unique pages`);
  console.log(`\nNote: For Istanbul HTML report, run: npx playwright show-report`);
  
  return report;
}

generateSimpleReport();