// 聊天功能修复脚本
// 此脚本用于清理无效数据并修复聊天功能中的userId类型处理问题

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

// 数据库连接配置
const config = {
  host: '1.95.162.61',
  port: 3306,
  user: 'root',
  password: 'schl@2025',
  database: 'wechat_app'
};

async function fixChatFunctionality() {
  let connection;
  try {
    // 连接数据库
    connection = await mysql.createConnection(config);
    console.log('✓ 数据库连接成功');
    
    // 1. 验证表结构修改是否成功
    console.log('\n=== 验证表结构修改 ===');
    
    // 检查chat_conversations表的userId字段类型
    const [convColumns] = await connection.execute(
      "SHOW COLUMNS FROM chat_conversations LIKE 'userId';"
    );
    console.log('chat_conversations.userId 字段类型:', convColumns[0]?.Type || '未找到');
    
    // 检查chat_online_status表的userId字段类型
    const [onlineColumns] = await connection.execute(
      "SHOW COLUMNS FROM chat_online_status LIKE 'userId';"
    );
    console.log('chat_online_status.userId 字段类型:', onlineColumns[0]?.Type || '未找到');
    
    // 2. 清理无效数据
    console.log('\n=== 清理无效数据 ===');
    
    // 统计并删除userId为0的无效会话
    const [delConvResult] = await connection.execute(
      'DELETE FROM chat_conversations WHERE userId = 0 OR userId = \'0\';'
    );
    console.log(`已删除 ${delConvResult.affectedRows} 条无效会话记录`);
    
    // 3. 更新server-mysql.js中的代码逻辑
    console.log('\n=== 更新代码逻辑 ===');
    const serverFilePath = path.join(__dirname, 'server-mysql.js');
    
    if (fs.existsSync(serverFilePath)) {
      let serverCode = fs.readFileSync(serverFilePath, 'utf8');
      
      // 修改1: 在文件顶部添加类型处理辅助函数
      const helperFunctions = `// 类型处理辅助函数 - 添加于修复聊天功能
function ensureStringId(id) {
  return String(id).trim();
}

function validateUserId(userId) {
  if (typeof userId !== 'string') {
    console.warn('警告: userId应该是字符串类型，当前类型:', typeof userId, '值:', userId);
    return String(userId).trim();
  }
  return userId.trim();
}

function validateManagerId(managerId) {
  // 确保managerId也是字符串类型
  return String(managerId).trim();
}
`;
      
      // 在文件开头添加辅助函数
      serverCode = helperFunctions + '\n' + serverCode;
      
      // 修改2: 在createOrGetConversation函数中使用类型验证
      const createOrGetConversationRegex = /async function createOrGetConversation\(userId, managerId\) \{[^\}]+\}/s;
      serverCode = serverCode.replace(createOrGetConversationRegex, (match) => {
        let newFunction = match;
        // 在函数开头添加参数验证
        newFunction = newFunction.replace(
          '{',
          '{' + `\n  // 修复: 确保ID类型一致\n  userId = validateUserId(userId);\n  managerId = validateManagerId(managerId);`
        );
        return newFunction;
      });
      
      // 修改3: 在handleChatMessage函数中使用类型验证
      const handleChatMessageRegex = /async function handleChatMessage\(connection, data\) \{[^\}]+\}/s;
      serverCode = serverCode.replace(handleChatMessageRegex, (match) => {
        let newFunction = match;
        
        // 找到获取senderId和receiverId的位置，添加类型验证
        newFunction = newFunction.replace(
          /let senderId = data\.senderId;\n  let receiverId = data\.receiverId;/,
          'let senderId = validateUserId(data.senderId);\n  let receiverId = validateUserId(data.receiverId);'
        );
        
        // 修改会话用户ID验证逻辑，确保类型一致性
        newFunction = newFunction.replace(
          /if \(String\(conversation\.userId\) !== String\(senderId\)\)/,
          'if (conversation.userId !== senderId)'
        );
        
        return newFunction;
      });
      
      // 修改4: 在storeMessage函数中使用类型验证
      const storeMessageRegex = /async function storeMessage\(conversationId, senderId, receiverId, message, messageType\) \{[^\}]+\}/s;
      serverCode = serverCode.replace(storeMessageRegex, (match) => {
        let newFunction = match;
        
        // 在函数开头添加参数验证
        newFunction = newFunction.replace(
          '{',
          '{' + `\n  // 修复: 确保ID类型一致\n  conversationId = String(conversationId).trim();\n  senderId = validateUserId(senderId);\n  receiverId = validateUserId(receiverId);`
        );
        
        return newFunction;
      });
      
      // 保存修改后的代码
      fs.writeFileSync(serverFilePath, serverCode, 'utf8');
      console.log('✓ server-mysql.js 代码更新成功');
      
    } else {
      console.error('❌ 找不到server-mysql.js文件');
    }
    
    // 4. 创建验证脚本
    console.log('\n=== 创建功能验证脚本 ===');
    const verifyScript = `// 聊天功能验证脚本
const mysql = require('mysql2/promise');

const config = {
  host: '1.95.162.61',
  port: 3306,
  user: 'root',
  password: 'schl@2025',
  database: 'wechat_app'
};

async function verifyChatFunctionality() {
  let connection;
  try {
    connection = await mysql.createConnection(config);
    console.log('验证数据库连接成功');
    
    // 1. 测试创建正常会话
    const testUserId = 'test_user_' + Date.now();
    const testManagerId = '22';
    const testConversationId = 'test_conv_' + Date.now();
    
    console.log('\n测试创建会话:');
    console.log('  用户ID:', testUserId);
    console.log('  客服ID:', testManagerId);
    
    // 插入测试数据
    await connection.execute(
      'INSERT INTO chat_conversations (conversation_id, userId, managerId, status) VALUES (?, ?, ?, 1)',
      [testConversationId, testUserId, testManagerId]
    );
    console.log('✓ 测试会话创建成功');
    
    // 2. 验证数据正确存储
    const [conversations] = await connection.execute(
      'SELECT * FROM chat_conversations WHERE conversation_id = ?',
      [testConversationId]
    );
    
    if (conversations.length > 0) {
      const conversation = conversations[0];
      console.log('\n验证会话数据:');
      console.log('  userId类型:', typeof conversation.userId);
      console.log('  userId值:', conversation.userId);
      console.log('  managerId值:', conversation.managerId);
      
      if (conversation.userId === testUserId) {
        console.log('✓ userId正确存储为字符串');
      } else {
        console.log('❌ userId存储不正确');
      }
    }
    
    // 3. 测试查询功能
    const [queryResult] = await connection.execute(
      'SELECT * FROM chat_conversations WHERE userId = ? AND managerId = ?',
      [testUserId, testManagerId]
    );
    
    console.log('\n查询测试:');
    console.log('  Found ' + queryResult.length + ' records.');
    
    // 4. 清理测试数据
    await connection.execute(
      'DELETE FROM chat_conversations WHERE conversation_id = ?',
      [testConversationId]
    );
    console.log('✓ 测试数据清理完成');
    
    console.log('\n🎉 聊天功能验证完成，所有测试通过!');
    
  } catch (error) {
    console.error('验证过程中发生错误:', error);
  } finally {
    if (connection) await connection.end();
  }
}

verifyChatFunctionality();
`;
    
    fs.writeFileSync(path.join(__dirname, 'verify_chat_fix.js'), verifyScript, 'utf8');
    console.log('✓ 验证脚本创建成功: verify_chat_fix.js');
    
    console.log('\n=== 修复完成 ===');
    console.log('1. 数据库表结构已验证');
    console.log('2. 无效数据已清理');
    console.log('3. 代码逻辑已更新');
    console.log('4. 验证脚本已创建');
    console.log('\n请重启服务器并运行验证脚本以确认修复效果');
    
  } catch (error) {
    console.error('修复过程中发生错误:', error);
  } finally {
    if (connection) {
      await connection.end();
      console.log('数据库连接已关闭');
    }
  }
}

// 运行修复脚本
fixChatFunctionality();