const { execSync } = require('child_process');
const fs = require('fs');
const path = require('path');

const RESULTS_DIR = path.join(__dirname, '../../test-results/performance');
const REPORT_FILE = path.join(RESULTS_DIR, 'performance-report.json');
const SUMMARY_FILE = path.join(RESULTS_DIR, 'performance-summary.txt');

function ensureResultsDir() {
  if (!fs.existsSync(RESULTS_DIR)) {
    fs.mkdirSync(RESULTS_DIR, { recursive: true });
  }
}

function runPerformanceTests() {
  console.log('开始运行性能测试...');
  console.log('='.repeat(50));

  ensureResultsDir();

  try {
    const startTime = Date.now();

    execSync('npx playwright test e2e/performance/page-load.spec.ts --reporter=json --reporter-file=test-results/performance/page-load.json', {
      stdio: 'inherit',
      cwd: path.join(__dirname, '../..'),
    });

    execSync('npx playwright test e2e/performance/animation.spec.ts --reporter=json --reporter-file=test-results/performance/animation.json', {
      stdio: 'inherit',
      cwd: path.join(__dirname, '../..'),
    });

    const endTime = Date.now();
    const duration = ((endTime - startTime) / 1000).toFixed(2);

    console.log('='.repeat(50));
    console.log(`性能测试完成，耗时: ${duration}秒`);
    console.log('='.repeat(50));

    generateSummary();

    return { success: true, duration };
  } catch (error) {
    console.error('性能测试失败:', error.message);
    return { success: false, error: error.message };
  }
}

function generateSummary() {
  console.log('生成性能测试摘要...');

  const pageLoadResults = readTestResults('page-load.json');
  const animationResults = readTestResults('animation.json');

  const summary = generatePerformanceSummary(pageLoadResults, animationResults);

  fs.writeFileSync(SUMMARY_FILE, summary, 'utf-8');

  console.log('性能测试摘要已生成:', SUMMARY_FILE);
}

function readTestResults(filename) {
  const filePath = path.join(RESULTS_DIR, filename);

  if (!fs.existsSync(filePath)) {
    return { suites: [], specs: [], tests: [] };
  }

  const content = fs.readFileSync(filePath, 'utf-8');
  return JSON.parse(content);
}

function generatePerformanceSummary(pageLoadResults, animationResults) {
  const pageLoadTests = pageLoadResults.tests || [];
  const animationTests = animationResults.tests || [];

  const totalTests = pageLoadTests.length + animationTests.length;
  const passedTests = [...pageLoadTests, ...animationTests].filter(test => test.status === 'passed').length;
  const failedTests = totalTests - passedTests;

  const summary = `
性能测试报告摘要
================
测试时间: ${new Date().toISOString()}
测试数量: ${totalTests}
通过数量: ${passedTests}
失败数量: ${failedTests}
通过率: ${((passedTests / totalTests) * 100).toFixed(2)}%

页面加载性能测试
----------------
测试数量: ${pageLoadTests.length}
通过数量: ${pageLoadTests.filter(test => test.status === 'passed').length}
失败数量: ${pageLoadTests.filter(test => test.status === 'failed').length}

动画性能测试
------------
测试数量: ${animationTests.length}
通过数量: ${animationTests.filter(test => test.status === 'passed').length}
失败数量: ${animationTests.filter(test => test.status === 'failed').length}

失败测试详情
------------
${[...pageLoadTests, ...animationTests]
  .filter(test => test.status === 'failed')
  .map((test, index) => `
${index + 1}. ${test.title}
   - 文件: ${test.location.file}
   - 行号: ${test.location.line}
   - 错误: ${test.error?.message || '未知错误'}
`).join('\n')}

性能指标
--------
页面加载性能阈值:
  - 页面加载时间: < 2000ms
  - 首次内容绘制: < 1000ms
  - 最大内容绘制: < 1500ms
  - 可交互时间: < 2000ms
  - 累积布局偏移: < 0.1
  - 首次输入延迟: < 100ms

动画性能阈值:
  - 动画帧率: > 30fps
  - 帧时间: < 33.33ms
  - 动画持续时间: < 500ms

建议
----
${failedTests > 0 ? `
1. 优先修复失败的测试用例
2. 检查性能指标是否超过阈值
3. 优化页面加载性能
4. 优化动画性能
` : `
1. 持续监控性能指标
2. 定期运行性能测试
3. 记录性能基线
4. 及时发现性能退化
`}
`;

  return summary;
}

function main() {
  const args = process.argv.slice(2);
  const command = args[0] || 'run';

  switch (command) {
    case 'run':
      const result = runPerformanceTests();
      process.exit(result.success ? 0 : 1);
      break;
    case 'summary':
      generateSummary();
      process.exit(0);
      break;
    default:
      console.log('用法: node run-tests.js [run|summary]');
      console.log('  run      - 运行性能测试');
      console.log('  summary  - 生成性能测试摘要');
      process.exit(1);
  }
}

if (require.main === module) {
  main();
}

module.exports = {
  runPerformanceTests,
  generateSummary,
};