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

/**
 * 导入公司信息 SQL 生成脚本
 * 从 _doc/公司xinxi.md 文件读取数据并生成 SQL INSERT 语句
 */

// 转义 SQL 字符串中的特殊字符
function escapeSql(str) {
  if (!str) return '';
  return str.replace(/'/g, "''").replace(/\\/g, '\\\\');
}

// 从注册地址提取省份和城市
function extractProvinceAndCity(address) {
  if (!address) return { province: '', city: '' };
  
  // 大部分都是上海的公司
  if (address.includes('上海')) {
    return { province: '上海', city: '上海' };
  }
  
  // 处理其他省份（如果有）
  const provincePatterns = [
    { pattern: /^(.+?省|.+?市|.+?自治区|.+?特别行政区)/, extract: (match) => match[1] }
  ];
  
  for (const { pattern, extract } of provincePatterns) {
    const match = address.match(pattern);
    if (match) {
      const province = extract(match);
      return { province, city: province };
    }
  }
  
  return { province: '', city: '' };
}

// 读取文件并解析数据
function parseCompanyData() {
  const filePath = path.join(__dirname, '../_doc/公司xinxi.md');
  const content = fs.readFileSync(filePath, 'utf-8');
  const lines = content.split('\n');
  
  const companies = [];
  
  // 跳过表头（第一行）
  for (let i = 1; i < lines.length; i++) {
    const line = lines[i].trim();
    if (!line) continue;
    
    // 按制表符分割
    const parts = line.split('\t');
    if (parts.length < 7) continue;
    
    const sequenceNumber = parts[0] || '';
    const stockCode = parts[1] || '';
    const companyName = parts[2] || '';
    const registeredAddress = parts[3] || '';
    const phone = parts[4] || '';
    const email = parts[5] || '';
    const website = parts[6] || '';
    
    // 提取省份和城市
    const { province, city } = extractProvinceAndCity(registeredAddress);
    
    // 判断是否上市（有证券代码就是上市）
    const isListed = stockCode ? 1 : 0;
    
    companies.push({
      sequence_number: sequenceNumber,
      stock_code: stockCode,
      company_name: companyName,
      registered_address: registeredAddress,
      province,
      city,
      phone,
      email,
      website,
      is_listed: isListed,
      recommendation_level: 'normal',
      is_enabled: 1
    });
  }
  
  return companies;
}

// 生成 SQL INSERT 语句
function generateSql(companies) {
  const sqlStatements = [];
  
  // 添加注释
  sqlStatements.push('-- 导入公司信息数据');
  sqlStatements.push(`-- 生成时间: ${new Date().toLocaleString('zh-CN')}`);
  sqlStatements.push(`-- 数据条数: ${companies.length}`);
  sqlStatements.push('');
  sqlStatements.push('-- 开始事务（可选）');
  sqlStatements.push('-- START TRANSACTION;');
  sqlStatements.push('');
  
  // 生成 INSERT 语句
  companies.forEach((company, index) => {
    const values = [
      company.sequence_number || 'NULL',
      company.stock_code ? `'${escapeSql(company.stock_code)}'` : 'NULL',
      `'${escapeSql(company.company_name)}'`,
      company.registered_address ? `'${escapeSql(company.registered_address)}'` : 'NULL',
      company.province ? `'${escapeSql(company.province)}'` : 'NULL',
      company.city ? `'${escapeSql(company.city)}'` : 'NULL',
      company.phone ? `'${escapeSql(company.phone)}'` : 'NULL',
      company.email ? `'${escapeSql(company.email)}'` : 'NULL',
      company.website ? `'${escapeSql(company.website)}'` : 'NULL',
      company.is_listed,
      `'${escapeSql(company.recommendation_level)}'`,
      company.is_enabled,
      'NULL' // remark
    ];
    
    const sql = `INSERT INTO company_info (
  sequence_number,
  stock_code,
  company_name,
  registered_address,
  province,
  city,
  phone,
  email,
  website,
  is_listed,
  recommendation_level,
  is_enabled,
  remark
) VALUES (
  ${values.join(',\n  ')}
);`;
    
    sqlStatements.push(sql);
    
    // 每 100 条添加一个注释
    if ((index + 1) % 100 === 0) {
      sqlStatements.push(`-- 已处理 ${index + 1} 条数据`);
      sqlStatements.push('');
    }
  });
  
  sqlStatements.push('');
  sqlStatements.push('-- 提交事务（可选）');
  sqlStatements.push('-- COMMIT;');
  
  return sqlStatements.join('\n');
}

// 主函数
function main() {
  try {
    console.log('开始解析公司信息数据...');
    const companies = parseCompanyData();
    console.log(`成功解析 ${companies.length} 条公司信息`);
    
    console.log('生成 SQL 语句...');
    const sql = generateSql(companies);
    
    // 保存到文件
    const outputPath = path.join(__dirname, '../_script/import_company_info.sql');
    fs.writeFileSync(outputPath, sql, 'utf-8');
    
    console.log(`SQL 文件已生成: ${outputPath}`);
    console.log(`文件大小: ${(fs.statSync(outputPath).size / 1024).toFixed(2)} KB`);
    
    // 显示统计信息
    const listedCount = companies.filter(c => c.is_listed === 1).length;
    const provinceStats = {};
    companies.forEach(c => {
      const p = c.province || '未知';
      provinceStats[p] = (provinceStats[p] || 0) + 1;
    });
    
    console.log('\n统计信息:');
    console.log(`- 总数量: ${companies.length}`);
    console.log(`- 上市公司: ${listedCount}`);
    console.log(`- 未上市公司: ${companies.length - listedCount}`);
    console.log('\n省份分布:');
    Object.entries(provinceStats).forEach(([province, count]) => {
      console.log(`  - ${province}: ${count}`);
    });
    
  } catch (error) {
    console.error('生成 SQL 失败:', error);
    process.exit(1);
  }
}

// 执行
main();