const fs = require('fs');
const content = fs.readFileSync('final-backend.js', 'utf8');
const lines = content.split('\n');

// 找到products模块的开始（第一个app.get('/api/products'）
let startLine = -1;
for (let i = 0; i < lines.length; i++) {
  if (lines[i].includes("app.get('/api/products'")) {
    startLine = i + 1; // 转换为1-based行号
    break;
  }
}

// 找到products模块的结束（在products模块之后，下一个模块开始之前）
let endLine = -1;
for (let i = startLine - 1; i < lines.length; i++) {
  if (lines[i].includes('app.') && lines[i].includes('/api/')) {
    const nextPath = lines[i].match(/['\"](\/api\/[^'\"]+)['\"]/);
    if (nextPath && !nextPath[1].startsWith('/api/products')) {
      // 找到上一个路由的结束
      for (let j = i - 1; j >= 0; j--) {
        if (lines[j].trim() === '});') {
          endLine = j;
          break;
        }
      }
      break;
    }
  }
}

if (startLine === -1) {
  console.log('❌ 无法找到products模块的开始');
  process.exit(1);
}

if (endLine === -1) {
  // 如果没找到下一个模块，使用文件末尾
  endLine = lines.length - 1;
}

console.log(`products模块范围：第${startLine}行到第${endLine + 1}行`);

// 提取products模块代码
const productsCode = lines.slice(startLine - 1, endLine + 1).join('\n');

console.log('\n提取的products模块代码（前200字符）：');
console.log('=' .repeat(50));
console.log(productsCode.substring(0, 200) + '...');
console.log('=' .repeat(50));

// 将app.替换为router.
const routerCode = productsCode.replace(/app\.(get|post|put|delete|patch)/g, 'router.$1');

// 修复路径：移除/api前缀，因为主文件会使用app.use('/api/products', productsRoutes)
const fixedRouterCode = routerCode
  .replace(/router\.get\('\/api\/products'/g, "router.get('/'")
  .replace(/router\.get\('\/api\/products\/template'/g, "router.get('/template'")
  .replace(/router\.get\('\/api\/products\/:id'/g, "router.get('/:id'")
  .replace(/router\.post\('\/api\/products'/g, "router.post('/'")
  .replace(/router\.put\('\/api\/products\/:id'/g, "router.put('/:id'")
  .replace(/router\.delete\('\/api\/products\/:id'/g, "router.delete('/:id'")
  .replace(/router\.post\('\/api\/products\/batch-import'/g, "router.post('/batch-import'");

console.log('\n转换后的router代码（前200字符）：');
console.log('=' .repeat(50));
console.log(fixedRouterCode.substring(0, 200) + '...');
console.log('=' .repeat(50));

// 创建完整的products路由文件
const fullProductsCode = `const express = require('express');
const router = express.Router();

// 导入依赖
const db = require('../db-sqlite');

${fixedRouterCode}

module.exports = router;`;

console.log('\n完整的products路由文件内容（前300字符）：');
console.log('=' .repeat(50));
console.log(fullProductsCode.substring(0, 300) + '...');
console.log('=' .repeat(50));

// 写入文件
fs.writeFileSync('routes/products.js', fullProductsCode);
console.log('\n✅ products路由文件已创建：routes/products.js');

// 验证文件
const fileContent = fs.readFileSync('routes/products.js', 'utf8');
console.log(`文件大小：${fileContent.length} 字符`);
if (fileContent.length > 100) {
  console.log('✅ 文件创建成功，内容长度 > 100 字符');
} else {
  console.log('❌ 文件创建失败，内容长度不足');
  process.exit(1);
}