const mysql = require('mysql2');

async function checkTables() {
  const connection = mysql.createConnection({
    host: process.env.DB_HOST || 'nj-cdb-3pwh2kz1.sql.tencentcdb.com',
    port: process.env.DB_PORT || 20784,
    user: process.env.DB_USER || 'jiebanke',
    password: process.env.DB_PASSWORD || 'aiot741$12346',
    database: process.env.DB_NAME || 'niumall'
  });

  try {
    console.log('连接到远程数据库...');
    
    // 获取所有表名
    const [tables] = await connection.promise().query('SHOW TABLES');
    console.log('数据库中的表:');
    tables.forEach(table => {
      const tableName = table[`Tables_in_${process.env.DB_NAME || 'niumall'}`];
      console.log(`- ${tableName}`);
    });

    // 获取每个表的详细信息
    console.log('\n表结构详情:');
    for (const table of tables) {
      const tableName = table[`Tables_in_${process.env.DB_NAME || 'niumall'}`];
      console.log(`\n表 ${tableName}:`);
      
      const [columns] = await connection.promise().query(`DESCRIBE ${tableName}`);
      columns.forEach(column => {
        console.log(`  ${column.Field} (${column.Type}) ${column.Null === 'YES' ? 'NULL' : 'NOT NULL'} ${column.Key ? `KEY: ${column.Key}` : ''} ${column.Default ? `DEFAULT: ${column.Default}` : ''}`);
      });
    }

  } catch (error) {
    console.error('数据库连接错误:', error.message);
  } finally {
    await connection.end();
  }
}

checkTables();