require('dotenv').config();
const mysql = require('mysql2/promise');

// 查询用户信息
async function listUsers() {
  let connection = null;
  try {
    console.log('连接数据库...');
    connection = await mysql.createConnection({
      host: process.env.DB_HOST || 'localhost',
      user: process.env.DB_USER || 'root',
      password: process.env.DB_PASSWORD === undefined ? null : process.env.DB_PASSWORD,
      database: process.env.DB_DATABASE || 'wechat_app',
      port: process.env.DB_PORT || 3306,
      timezone: '+08:00' // 设置时区为UTC+8
    });
    console.log('数据库连接成功\n');

    // 查询users表结构
    console.log('=== users表结构 ===');
    const [columns] = await connection.execute(
      'SHOW COLUMNS FROM users'
    );
    console.log('字段列表:', columns.map(col => col.Field).join(', '));
    console.log();

    // 查询前5个用户数据
    console.log('=== 用户数据 (前5个) ===');
    const [users] = await connection.execute(
      'SELECT * FROM users LIMIT 5'
    );
    console.log(`数据库中有 ${users.length} 个用户记录`);
    
    if (users.length > 0) {
      users.forEach((user, index) => {
        console.log(`${index + 1}. 用户数据:`, user);
      });
      
      // 查找可能的openid字段
      const firstUser = users[0];
      const possibleOpenIdFields = Object.keys(firstUser).filter(key => 
        key.toLowerCase().includes('openid') || key.toLowerCase().includes('open_id')
      );
      
      if (possibleOpenIdFields.length > 0) {
        console.log('\n=== 可能的openid字段 ===');
        console.log('找到以下可能的openid字段:', possibleOpenIdFields.join(', '));
        console.log('请使用其中一个有效的字段更新测试脚本');
      } else {
        console.log('\n未找到明显的openid字段，请检查users表结构后手动更新测试脚本');
      }
    } else {
      console.log('\n数据库中没有用户记录');
    }

  } catch (error) {
    console.error('查询过程中发生错误:', error);
  } finally {
    if (connection) {
      await connection.end();
      console.log('\n数据库连接已关闭');
    }
  }
}

// 运行查询
listUsers();