const mysql = require('mysql2/promise');

// 数据库连接配置
const dbConfig = {
  host: 'gz-cynosdbmysql-grp-d26pzce5.sql.tencentcdb.com',
  port: 24936,
  user: 'root',
  password: '!Rjb12191',
  database: 'pronode_db',
  charset: 'utf8mb4'
};

async function testConnection() {
  let connection;
  
  try {
    console.log('🔌 正在连接腾讯云数据库...');
    
    // 创建连接
    connection = await mysql.createConnection(dbConfig);
    
    console.log('✅ 数据库连接成功！');
    
    // 测试查询
    const [rows] = await connection.execute('SELECT 1 as test');
    console.log('✅ 查询测试成功:', rows[0]);
    
    // 检查数据库是否存在
    const [databases] = await connection.execute('SHOW DATABASES');
    console.log('📊 可用数据库:');
    databases.forEach(db => {
      console.log(`  - ${db.Database}`);
    });
    
    // 检查当前数据库的表
    const [tables] = await connection.execute('SHOW TABLES');
    console.log('📋 当前数据库表:');
    if (tables.length === 0) {
      console.log('  (暂无表)');
    } else {
      tables.forEach(table => {
        console.log(`  - ${Object.values(table)[0]}`);
      });
    }
    
    return true;
    
  } catch (error) {
    console.error('❌ 数据库连接失败:', error.message);
    return false;
  } finally {
    if (connection) {
      await connection.end();
      console.log('🔌 数据库连接已关闭');
    }
  }
}

// 运行测试
testConnection().then(success => {
  if (success) {
    console.log('🎉 数据库连接测试完成！');
  } else {
    console.log('💥 数据库连接测试失败！');
  }
  process.exit(success ? 0 : 1);
});