// 更新商品联系人信息的数据库函数
require('dotenv').config();
const { Sequelize } = require('sequelize');

// 创建wechat_app数据库连接
const wechatAppSequelize = new Sequelize(
  process.env.DB_DATABASE || 'wechat_app',
  process.env.DB_USER || 'root',
  process.env.DB_PASSWORD === undefined ? null : process.env.DB_PASSWORD,
  {
    host: process.env.DB_HOST || 'localhost',
    port: process.env.DB_PORT || 3306,
    dialect: 'mysql',
    define: {
      timestamps: false
    },
    timezone: '+08:00' // 设置时区为UTC+8
  }
);

// 创建userlogin数据库连接
const userLoginSequelize = new Sequelize(
  'userlogin',
  process.env.DB_USER || 'root',
  process.env.DB_PASSWORD === undefined ? null : process.env.DB_PASSWORD,
  {
    host: process.env.DB_HOST || 'localhost',
    port: process.env.DB_PORT || 3306,
    dialect: 'mysql',
    define: {
      timestamps: false
    },
    timezone: '+08:00' // 设置时区为UTC+8
  }
);

// 主函数：更新商品联系人信息
async function updateProductContacts() {
  try {
    // 测试数据库连接
    await Promise.all([
      wechatAppSequelize.authenticate(),
      userLoginSequelize.authenticate()
    ]);
    console.log('✅ 数据库连接成功');
    
    // 1. 查询wechat_app数据库中products表status为published且product_contact为null的记录
    console.log('\n1. 查询待更新的商品...');
    const products = await wechatAppSequelize.query(
      'SELECT productId, productName FROM products WHERE status = ? AND product_contact IS NULL',
      {
        replacements: ['published'],
        type: wechatAppSequelize.QueryTypes.SELECT
      }
    );
    
    console.log(`📋 找到 ${products.length} 个待更新联系人信息的商品`);
    
    if (products.length === 0) {
      console.log('✅ 所有商品都已更新联系人信息，无需操作');
      return;
    }
    
    // 2. 查询userlogin库中managers表role为"销售员"的userName
    console.log('\n2. 查询所有销售员...');
    const managers = await userLoginSequelize.query(
      'SELECT userName FROM managers WHERE role = ?',
      {
        replacements: ['销售员'],
        type: userLoginSequelize.QueryTypes.SELECT
      }
    );
    
    const salesmanUserNames = managers.map(m => m.userName);
    console.log(`👥 找到 ${salesmanUserNames.length} 名销售员`);
    
    if (salesmanUserNames.length === 0) {
      console.log('❌ 没有找到销售员，无法更新商品联系人信息');
      return;
    }
    
    // 3. 在wechat_app库中查询这些销售员的nickName和phoneNumber
    console.log('\n3. 查询销售员的联系方式...');
    const salesmenContacts = await wechatAppSequelize.query(
      'SELECT nickName, phoneNumber FROM users WHERE nickName IN (?)',
      {
        replacements: [salesmanUserNames],
        type: wechatAppSequelize.QueryTypes.SELECT
      }
    );
    
    console.log(`📞 找到 ${salesmenContacts.length} 名有联系方式的销售员`);
    
    if (salesmenContacts.length === 0) {
      console.log('❌ 没有找到有联系方式的销售员，无法更新商品联系人信息');
      return;
    }
    
    // 4. 随机分配销售员到商品
    console.log('\n4. 开始分配销售员到商品...');
    let updatedCount = 0;
    
    for (const product of products) {
      // 随机选择一个销售员
      const randomIndex = Math.floor(Math.random() * salesmenContacts.length);
      const selectedSalesman = salesmenContacts[randomIndex];
      
      // 更新商品的联系人信息
      await wechatAppSequelize.query(
        'UPDATE products SET product_contact = ?, contact_phone = ? WHERE productId = ?',
        {
          replacements: [
            selectedSalesman.nickName,
            selectedSalesman.phoneNumber,
            product.productId
          ],
          type: wechatAppSequelize.QueryTypes.UPDATE
        }
      );
      
      console.log(`✅ 商品 ${product.productId} (${product.productName}) 已分配销售员: ${selectedSalesman.nickName} - ${selectedSalesman.phoneNumber}`);
      updatedCount++;
    }
    
    console.log(`\n🎉 更新完成！共更新了 ${updatedCount} 个商品的联系人信息`);
    
  } catch (error) {
    console.error('❌ 操作失败:', error.message);
    console.error('📝 错误详情:', error);
  }
}

// 导出函数供其他模块使用
module.exports = updateProductContacts;

// 如果直接运行此文件，则执行更新操作
if (require.main === module) {
  updateProductContacts();
}