const { Sequelize } = require('sequelize');
const fs = require('fs');
const path = require('path');

// 读取环境变量
const envPath = path.join(__dirname, '.env');
if (fs.existsSync(envPath)) {
  const envContent = fs.readFileSync(envPath, 'utf8');
  const envVars = envContent.split('\n').filter(line => line.trim() && !line.startsWith('#'));
  envVars.forEach(line => {
    const [key, value] = line.split('=').map(part => part.trim());
    process.env[key] = value;
  });
}

// 数据库连接配置
const sequelize = new Sequelize(
  process.env.DB_NAME || 'wechat_app',
  process.env.DB_USER || 'root',
  process.env.DB_PASSWORD || '',
  {
    host: process.env.DB_HOST || 'localhost',
    port: process.env.DB_PORT || 3306,
    dialect: 'mysql',
    logging: false,
    timezone: '+08:00' // 设置时区为UTC+8
  }
);

// 查看usermanagements表结构
async function viewUserManagementsTableStructure() {
  try {
    console.log('========================================');
    console.log('查看usermanagements表结构');
    console.log('========================================');
    
    // 连接数据库
    await sequelize.authenticate();
    console.log('✅ 数据库连接成功');
    
    // 查询表结构
    const tableStructure = await sequelize.query(
      'SHOW COLUMNS FROM usermanagements',
      { type: sequelize.QueryTypes.SELECT }
    );
    
    console.log('\nusermanagements表字段信息:');
    tableStructure.forEach(column => {
      console.log(`- ${column.Field}: ${column.Type} ${column.Null === 'NO' ? '(NOT NULL)' : ''} ${column.Key === 'PRI' ? '(PRIMARY KEY)' : ''}`);
    });
    
    // 查询表索引
    const indexes = await sequelize.query(
      'SHOW INDEX FROM usermanagements',
      { type: sequelize.QueryTypes.SELECT }
    );
    
    if (indexes.length > 0) {
      console.log('\nusermanagements表索引信息:');
      indexes.forEach(index => {
        console.log(`- 索引名: ${index.Key_name}, 字段: ${index.Column_name}, 唯一: ${index.Non_unique === 0 ? '是' : '否'}`);
      });
    }
    
    // 查询表中的最新5条记录
    console.log('\nusermanagements表中的最新5条记录:');
    
    // 尝试查找一个可能的时间字段
    const possibleTimeFields = tableStructure
      .map(col => col.Field)
      .filter(field => field.toLowerCase().includes('time') || field.toLowerCase().includes('date'));
    
    let latestRecords;
    
    if (possibleTimeFields.length > 0) {
      console.log(`找到可能的时间字段: ${possibleTimeFields.join(', ')}`);
      // 使用第一个找到的时间字段排序
      latestRecords = await sequelize.query(
        `SELECT userId FROM usermanagements ORDER BY ${possibleTimeFields[0]} DESC LIMIT 5`,
        { type: sequelize.QueryTypes.SELECT }
      );
    } else {
      console.log('未找到明显的时间字段，按userId排序');
      latestRecords = await sequelize.query(
        'SELECT userId FROM usermanagements ORDER BY userId DESC LIMIT 5',
        { type: sequelize.QueryTypes.SELECT }
      );
    }
    
    latestRecords.forEach((record, index) => {
      console.log(`   ${index + 1}. userId: ${record.userId}`);
    });
    
    console.log('\n========================================');
    
  } catch (error) {
    console.error('❌ 查看表结构过程中发生错误:', error.message);
    console.error('错误详情:', error);
  } finally {
    // 关闭数据库连接
    await sequelize.close();
  }
}

// 运行查看
viewUserManagementsTableStructure();