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

async function verifyEnvironmentData() {
  let connection;
  
  try {
    // 创建数据库连接
    connection = await mysql.createConnection({
      host: process.env.DB_HOST,
      port: process.env.DB_PORT,
      user: process.env.DB_USER,
      password: process.env.DB_PASSWORD,
      database: process.env.DB_NAME
    });
    
    console.log('数据库连接成功');
    
    // 检查表是否存在
    const [tables] = await connection.execute(
      "SHOW TABLES LIKE 'environment_schedules'"
    );
    
    if (tables.length === 0) {
      console.log('环境监测时刻表不存在');
      return;
    }
    
    console.log('环境监测时刻表存在');
    
    // 获取总记录数
    const [countResult] = await connection.execute(
      'SELECT COUNT(*) as total_records FROM environment_schedules'
    );
    console.log(`\n总记录数: ${countResult[0].total_records}`);
    
    // 按农场分组统计
    const [farmStats] = await connection.execute(
      `SELECT farm_id, COUNT(*) as record_count, 
              MIN(monitoring_date) as earliest_date,
              MAX(monitoring_date) as latest_date
       FROM environment_schedules 
       GROUP BY farm_id 
       ORDER BY farm_id`
    );
    
    console.log('\n按农场统计:');
    farmStats.forEach(stat => {
      console.log(`农场${stat.farm_id}: ${stat.record_count}条记录, 日期范围: ${stat.earliest_date} 到 ${stat.latest_date}`);
    });
    
    // 获取最新的10条记录
    const [recentRecords] = await connection.execute(
      `SELECT farm_id, device_id, schedule_time, temperature, humidity, 
              DATE(monitoring_date) as date, status 
       FROM environment_schedules 
       ORDER BY monitoring_date DESC, schedule_time DESC 
       LIMIT 10`
    );
    
    console.log('\n最新的10条环境监测记录:');
    console.log('农场ID | 设备ID   | 日期       | 时间     | 温度(°C) | 湿度(%) | 状态');
    console.log('-------|----------|------------|----------|----------|---------|--------');
    recentRecords.forEach(record => {
      console.log(`${record.farm_id.toString().padEnd(6)} | ${record.device_id.padEnd(8)} | ${record.date} | ${record.schedule_time} | ${record.temperature.toString().padEnd(8)} | ${record.humidity.toString().padEnd(7)} | ${record.status}`);
    });
    
    // 检查数据分布
    const [timeStats] = await connection.execute(
      `SELECT schedule_time, COUNT(*) as count
       FROM environment_schedules 
       GROUP BY schedule_time 
       ORDER BY schedule_time`
    );
    
    console.log('\n按监测时间统计:');
    timeStats.forEach(stat => {
      console.log(`${stat.schedule_time}: ${stat.count}条记录`);
    });
    
    // 温度湿度范围统计
    const [rangeStats] = await connection.execute(
      `SELECT 
         MIN(temperature) as min_temp, MAX(temperature) as max_temp, AVG(temperature) as avg_temp,
         MIN(humidity) as min_humidity, MAX(humidity) as max_humidity, AVG(humidity) as avg_humidity
       FROM environment_schedules`
    );
    
    console.log('\n温度湿度统计:');
    const stats = rangeStats[0];
    console.log(`温度范围: ${parseFloat(stats.min_temp).toFixed(2)}°C - ${parseFloat(stats.max_temp).toFixed(2)}°C (平均: ${parseFloat(stats.avg_temp).toFixed(2)}°C)`);
    console.log(`湿度范围: ${parseFloat(stats.min_humidity).toFixed(2)}% - ${parseFloat(stats.max_humidity).toFixed(2)}% (平均: ${parseFloat(stats.avg_humidity).toFixed(2)}%)`);
    
  } catch (error) {
    console.error('验证失败:', error.message);
  } finally {
    if (connection) {
      await connection.end();
      console.log('\n数据库连接已关闭');
    }
  }
}

// 运行验证脚本
verifyEnvironmentData();