import http from '../../../utils/api'
const baseUrl = require('../../../utils/baseUrl')

// WebSocket实例
let socketOpen = false
let socketMsgQueue = []
let heartbeatInterval = null
let reconnectTimer = null
let isManualClose = false // 是否手动关闭
let heartBeatTimer = null // 心跳定时器

Page({
  data: {
    baseUrl: baseUrl,
    // 专家信息
    expertInfo: {},
    
    // 用户信息
    userInfo: {
      user: {} // 完整用户信息
    },
    
    // 对话信息
    conversation: {},
    
    // 消息列表
    messageList: [],
    scrollTop: 0,
    scrollAnimate: false,
    
    // 输入相关
    inputValue: '',
    inputFocus: false,
    
    // 多媒体
    showMediaSheet: false,
    
    // 页面状态
    showDateDivider: true,
    todayDate: '',
    loading: false,
    loadingMore: false,
    
    // 滚动相关
    isScrolling: false,
    lastScrollTop: 0,
    
    // 当前对话ID和对方用户ID
    currentExpertId: '',
    conversationId: '',
    otherUserId: '',
    
    // 分页相关
    page: 1,
    pageSize: 20,
    hasMore: true,
    total: 0,
    
    // 时间显示间隔
    timeInterval: 5,
    lastShowTimeStamp: 0,
    
    // 键盘高度
    keyboardHeight: 0,

    // WebSocket状态
    socketConnected: false,
    reconnectCount: 0,
    maxReconnectCount: 5
  },

  onLoad: function(options) {
    console.log('接收到的参数:', options);
    
    // 设置今天日期
    this.setTodayDate();
    
    // 加载用户信息
    this.loadUserInfo();
    
    // 获取对方用户ID
    if (options.id) {
      this.setData({ 
        otherUserId: options.id,
        currentExpertId: options.id 
      });
      
      // 先创建对话，然后获取聊天记录
      this.createConversation(options.id);
    }
    
    // 监听键盘高度变化
    wx.onKeyboardHeightChange(this.onKeyboardHeightChange.bind(this));
  },

  onShow: function() {
    // 页面显示时连接WebSocket
    isManualClose = false;
    
    // 确保用户ID和对话ID都存在再连接
    const userId = this.getCurrentUserId();
    if (userId && this.data.conversationId) {
      console.log('页面显示，准备连接WebSocket，用户ID:', userId);
      this.connectWebSocket();
    } else {
      console.log('用户ID或对话ID不存在，稍后再连接', { 
        userId: userId, 
        conversationId: this.data.conversationId 
      });
    }
  },

  onHide: function() {
    // 页面隐藏时暂停心跳检查但不关闭连接
    console.log('页面隐藏，暂停心跳检查');
    if (heartBeatTimer) {
      clearInterval(heartBeatTimer);
      heartBeatTimer = null;
    }
  },

  onUnload: function() {
    // 页面卸载时关闭WebSocket并清理资源
    isManualClose = true;
    this.closeWebSocket();
    wx.offKeyboardHeightChange();
    
    // 清理定时器
    if (heartbeatInterval) {
      clearInterval(heartbeatInterval);
      heartbeatInterval = null;
    }
    if (reconnectTimer) {
      clearTimeout(reconnectTimer);
      reconnectTimer = null;
    }
    if (heartBeatTimer) {
      clearInterval(heartBeatTimer);
      heartBeatTimer = null;
    }
  },

  // 获取当前用户ID的辅助方法
  getCurrentUserId: function() {
    const userId = this.data.userInfo?.user?.userId;
    console.log('获取到的用户ID:', userId);
    return userId;
  },

  // 创建一对一聊天
  createConversation(id) {
    wx.showLoading({ title: '加载中...' });
    
    http.create({
      data: {
        otherUserId: id
      },
      success: res => {
        console.log('创建对话响应:', res);
        
        if (res && res.data) {
          // 保存对话ID
          const conversationData = res.data;
          this.setData({ 
            conversationId: conversationData.id || conversationData.conversationId || id,
            conversation: conversationData,
            otherUserId: id // 确保对方用户ID正确
          });
          
          
          // 获取聊天记录
          this.getChatHistory(id);
          
          // 连接WebSocket（确保用户ID已加载）
          const userId = this.getCurrentUserId();
          if (userId) {
            console.log('用户ID已存在，立即连接WebSocket');
            this.connectWebSocket();
          } else {
            console.log('用户ID尚未加载，等待用户信息加载完成');
          }
        } else {
          wx.hideLoading();
          wx.showToast({
            title: '创建对话失败',
            icon: 'none'
          });
        }
      },
      fail: err => {
        console.error('创建对话失败:', err);
        wx.hideLoading();
        wx.showToast({
          title: '网络错误',
          icon: 'none'
        });
      }
    });
  },

  // 获取聊天记录
  getChatHistory(id) {
    http.direct({
      data: {
        otherUserId: id,
        page: this.data.page,
        pageSize: this.data.pageSize
      },
      success: res => {
        console.log('获取聊天记录响应:', res);
        wx.hideLoading();
        
        if (res && res.code === 200) {
          // 处理返回的消息数据
          this.processChatHistory(res);
        } else {
          // 如果没有聊天记录，显示空状态
          this.setData({
            messageList: [],
            loading: false,
            hasMore: false
          });
        }
      },
      fail: err => {
        console.error('获取聊天记录失败:', err);
        wx.hideLoading();
        wx.showToast({
          title: '获取聊天记录失败',
          icon: 'none'
        });
        
        this.setData({
          messageList: [],
          loading: false
        });
      }
    });
  },

  // 处理聊天历史数据
  processChatHistory(response) {
    let messages = [];
    let total = 0;
    let hasMore = false;
    
    // 根据实际返回的数据结构调整这里
    if (response.rows && Array.isArray(response.rows)) {
      messages = response.rows;
      total = response.total || messages.length;
    } else if (response.data && Array.isArray(response.data)) {
      messages = response.data;
      total = response.total || messages.length;
    } else if (Array.isArray(response)) {
      messages = response;
      total = messages.length;
    }
    
    // 格式化消息数据，适配页面渲染
    const formattedMessages = this.formatMessages(messages);
    
    // 处理消息时间显示
    const processedMessages = this.processMessageTimes(formattedMessages);
    
    // 判断是否还有更多数据
    hasMore = this.data.page * this.data.pageSize < total;
    
    this.setData({
      messageList: processedMessages,
      loading: false,
      loadingMore: false,
      hasMore: hasMore,
      total: total
    }, () => {
      // 滚动到底部
      setTimeout(() => {
        this.scrollToBottom(true);
      }, 100);
    });
  },

  // 格式化消息数据
  formatMessages(messages) {
    if (!messages || messages.length === 0) return [];
    
    const userId = this.getCurrentUserId();
    console.log('格式化消息使用的用户ID:', userId);
    
    return messages.map(msg => {
      // 判断消息类型
      let contentType = msg.contentType || 'text';
      let type = msg.type || 'text';
      let content = msg.content || '';
      
      // 判断发送者
      const isMe = msg.senderId === userId || 
                   msg.fromUserId === userId || 
                   msg.userId === userId ||
                   msg.sendId === userId;
      
      return {
        id: msg.id || 'msg_' + Date.now() + Math.random(),
        isMe: isMe,
        sender: isMe ? 'user' : 'expert',
        senderId: msg.senderId || msg.fromUserId || msg.userId,
        contentType: contentType,
        type: type,
        content: content,
        timestamp: msg.createTime || msg.timestamp || Date.now(),
        status: msg.status || 'success',
        ...msg
      };
    });
  },



  // 加载用户信息
  loadUserInfo: function() {
    try {
      const userInfo = wx.getStorageSync('userInfo');
      console.log('从缓存加载的用户信息:', userInfo);
      
      if (userInfo) {
        // 处理用户信息，确保正确的结构
        let processedUserInfo = { ...this.data.userInfo };
        
        if (userInfo.user) {
          // 如果已经有user结构
          processedUserInfo = userInfo;
        } else if (userInfo.userId) {
          // 如果是直接返回的用户数据
          processedUserInfo = {
            user: userInfo
          };
        }
        
        // 确保有user对象
        if (!processedUserInfo.user) {
          processedUserInfo.user = {};
        }
        
        // 确保userId存在
        if (userInfo.userId && !processedUserInfo.user.userId) {
          processedUserInfo.user.userId = userInfo.userId;
        }
        
        // 设置用户ID
        const userId = processedUserInfo.user?.userId || userInfo.userId;
        if (userId) {
          processedUserInfo.id = userId;
        }
        
        console.log('处理后的用户信息:', processedUserInfo);
        this.setData({ userInfo: processedUserInfo });
        
        // 用户信息加载完成后，如果对话ID已存在，连接WebSocket
        if (this.data.conversationId && !this.data.socketConnected) {
          console.log('用户信息加载完成，连接WebSocket');
          this.connectWebSocket();
        }
      }
    } catch (e) {
      console.error('加载用户信息失败:', e);
    }
  },

  // 加载更多消息
  loadMoreMessages: function() {
    if (this.data.loadingMore || !this.data.hasMore || !this.data.otherUserId) return;
    
    this.setData({ 
      loadingMore: true,
      page: this.data.page + 1
    }, () => {
      this.getChatHistory(this.data.otherUserId);
    });
  },

  // ========== WebSocket相关方法 ==========

  // 连接WebSocket
  connectWebSocket() {
    // 如果已有连接，先检查是否可用
    if (socketOpen) {
      console.log('WebSocket已连接，无需重复连接');
      return;
    }

    const userId = this.getCurrentUserId();
    console.log('准备连接WebSocket，用户ID:', userId);
    
    if (!userId) {
      console.error('用户ID不存在，无法连接WebSocket');
      wx.showToast({
        title: '用户信息加载中，请稍后',
        icon: 'none'
      });
      return;
    }

    // WebSocket连接URL
    const basurl = '192.168.101.111:8081'; // 从配置文件获取
    const wsUrl = `ws://${basurl}/ws/mini/chat?userId=${userId}`;
    
    console.log('开始连接WebSocket:', wsUrl);
    
    wx.connectSocket({
      url: wsUrl,
      success: () => {
        console.log('WebSocket连接初始化成功');
      },
      fail: (err) => {
        console.error('WebSocket连接初始化失败:', err);
        this.reconnectWebSocket();
      }
    });

    // 监听连接打开
    wx.onSocketOpen(() => {
      console.log('WebSocket连接已打开');
      socketOpen = true;
      this.setData({ socketConnected: true, reconnectCount: 0 });
      
      // 发送队列中的消息
      while (socketMsgQueue.length > 0) {
        const msg = socketMsgQueue.shift();
        this.sendWebSocketMessage(msg);
      }
      
      // 开始心跳
      this.startHeartbeat();
    });

    // 监听收到消息
    wx.onSocketMessage((res) => {
      try {
        console.log('收到原始WebSocket消息:', res.data);
        const data = JSON.parse(res.data);
        console.log('解析后的消息:', data);
        
        // 处理不同类型的消息
        this.handleWebSocketMessage(data);
      } catch (e) {
        console.error('解析消息失败:', e, '原始数据:', res.data);
      }
    });

    // 监听连接关闭
    wx.onSocketClose(() => {
      console.log('WebSocket连接已关闭');
      socketOpen = false;
      this.setData({ socketConnected: false });
      
      // 停止心跳
      if (heartBeatTimer) {
        clearInterval(heartBeatTimer);
        heartBeatTimer = null;
      }
      
      // 如果不是手动关闭，尝试重连
      if (!isManualClose) {
        this.reconnectWebSocket();
      }
    });

    // 监听错误
    wx.onSocketError((err) => {
      console.error('WebSocket错误:', err);
      socketOpen = false;
      this.setData({ socketConnected: false });
    });
  },

  // 关闭WebSocket
  closeWebSocket() {
    if (socketOpen) {
      wx.closeSocket({
        success: () => {
          console.log('WebSocket连接已主动关闭');
        }
      });
      socketOpen = false;
      this.setData({ socketConnected: false });
    }
    
    if (heartBeatTimer) {
      clearInterval(heartBeatTimer);
      heartBeatTimer = null;
    }
  },

  // 重连WebSocket
  reconnectWebSocket() {
    if (this.data.reconnectCount >= this.data.maxReconnectCount) {
      console.log('达到最大重连次数，停止重连');
      return;
    }

    if (reconnectTimer) {
      clearTimeout(reconnectTimer);
    }

    reconnectTimer = setTimeout(() => {
      console.log(`尝试第${this.data.reconnectCount + 1}次重连`);
      this.setData({
        reconnectCount: this.data.reconnectCount + 1
      });
      this.connectWebSocket();
    }, 3000); // 3秒后重连
  },

  // 开始心跳
  startHeartbeat() {
    if (heartBeatTimer) {
      clearInterval(heartBeatTimer);
    }
    
    heartBeatTimer = setInterval(() => {
      if (socketOpen) {
        console.log('发送心跳');
        this.sendWebSocketMessage(JSON.stringify({
          type: 'heartbeat',
          userId: this.getCurrentUserId(),
          timestamp: Date.now()
        }));
      }
    }, 30000); // 30秒发送一次心跳
  },

  // 发送WebSocket消息
  sendWebSocketMessage(data) {
    if (socketOpen) {
      wx.sendSocketMessage({
        data: typeof data === 'string' ? data : JSON.stringify(data),
        success: () => {
          console.log('WebSocket消息发送成功:', data);
        },
        fail: (err) => {
          console.error('WebSocket消息发送失败:', err);
          // 加入队列，等待重发
          socketMsgQueue.push(data);
        }
      });
    } else {
      console.log('WebSocket未连接，消息加入队列');
      // 队列存储
      socketMsgQueue.push(data);
      
      // 尝试重连
      if (!isManualClose) {
        this.connectWebSocket();
      }
    }
  },

  // 处理WebSocket消息
  handleWebSocketMessage(data) {
    console.log('处理消息类型:', data.type);
    
    switch (data.type) {
      case 'chat': // 聊天消息
      case 'message': // 兼容其他类型
        // 新消息
        this.handleNewMessage(data);
        break;
        
      case 'message_status':
        // 消息状态更新（已读、送达等）
        this.handleMessageStatus(data);
        break;
        
      case 'typing':
        // 对方正在输入
        this.handleTypingStatus(data);
        break;
        
      case 'online_status':
        // 在线状态变更
        this.handleOnlineStatus(data);
        break;
        
      case 'heartbeat_ack':
        // 心跳响应
        console.log('收到心跳响应');
        break;
        
      default:
        console.log('未知消息类型:', data);
    }
  },

  // 处理新消息
  handleNewMessage(data) {
    console.log('处理新消息:', data);
    
    // 获取当前用户ID
    const currentUserId = this.getCurrentUserId();
    
    // 检查消息是否属于当前对话
    const conversationId = data.conversationId || data.chatId || data.roomId;
    const senderId = data.senderId || data.fromUserId || data.userId;
    const receiverId = data.receiverId || data.toUserId;
    
    console.log('消息归属检查:', {
      currentConversationId: this.data.conversationId,
      messageConversationId: conversationId,
      currentUserId: currentUserId,
      senderId: senderId,
      receiverId: receiverId,
      otherUserId: this.data.otherUserId
    });
    
    // 判断是否属于当前对话
    let isCurrentConversation = false;
    
    if (conversationId && conversationId === this.data.conversationId) {
      isCurrentConversation = true;
    } else if (!conversationId) {
      // 如果没有对话ID，则根据发送者和接收者判断
      // 消息发送者是我，接收者是对方
      if (senderId === currentUserId && receiverId === this.data.otherUserId) {
        isCurrentConversation = true;
      }
      // 消息发送者是对方，接收者是我
      else if (senderId === this.data.otherUserId && receiverId === currentUserId) {
        isCurrentConversation = true;
      }
    }
    
    if (!isCurrentConversation) {
      console.log('消息不属于当前对话，忽略');
      return;
    }
    
    // 判断发送者是否是当前用户
    const isMe = senderId === currentUserId;
    
    console.log('消息归属判断结果:', { isMe, isCurrentConversation });
    
    // 如果是自己发送的消息，检查是否已存在
    if (isMe) {
      // 检查是否已存在相同ID的消息
      const exists = this.data.messageList.some(msg => 
        msg.id === data.messageId || msg.id === data.id
      );
      if (exists) {
        console.log('消息已存在，忽略重复添加');
        return;
      }
    }

    const newMessage = {
      id: data.messageId || data.id || 'msg_' + Date.now() + Math.random(),
      isMe: isMe,
      sender: isMe ? 'user' : 'expert',
      senderId: senderId,
      contentType: data.contentType || 'text',
      type: data.contentType || 'text',
      content: data.content,
      timestamp: data.timestamp || Date.now(),
      status: 'success'
    };

    console.log('添加新消息到列表:', newMessage);

    // 处理消息时间显示
    const { messageList } = this.data;
    const processedMessage = this.processSingleMessageTime(newMessage, messageList);
    
    // 添加新消息
    messageList.push(processedMessage);
    
    this.setData({ messageList }, () => {
      this.scrollToBottom();
      
      // 如果不是自己发的消息，发送已读回执
      if (!newMessage.isMe) {
        this.sendReadReceipt(newMessage.id);
        
        // 播放提示音
        this.playNotificationSound();
        
        // 震动提示
        wx.vibrateShort({
          type: 'light'
        });
      }
    });
  },

  // 处理消息状态
  handleMessageStatus(data) {
    const { messageList } = this.data;
    const messageId = data.messageId || data.id;
    const index = messageList.findIndex(msg => msg.id === messageId);
    
    if (index !== -1) {
      messageList[index].status = data.status || 'success';
      this.setData({ messageList });
    }
  },

  // 处理正在输入状态
  handleTypingStatus(data) {
    const userId = data.userId || data.senderId;
    if (userId === this.data.otherUserId) {
      this.setData({
        'expertInfo.typing': true
      });
      
      clearTimeout(this.typingTimer);
      this.typingTimer = setTimeout(() => {
        this.setData({
          'expertInfo.typing': false
        });
      }, 3000);
    }
  },

  // 处理在线状态
  handleOnlineStatus(data) {
    const userId = data.userId || data.senderId;
    if (userId === this.data.otherUserId) {
      this.setData({
        'expertInfo.online': data.online || data.status === 'online'
      });
    }
  },

  // 发送消息 - 修复用户ID获取
  sendMessageToServer: function(content, type, messageId) {
    const receiverId = this.data.otherUserId;
    const senderId = this.getCurrentUserId();
    
    console.log('发送消息参数:', {
      senderId: senderId,
      receiverId: receiverId,
      content: content,
      type: type,
      messageId: messageId
    });

    if (!receiverId || !senderId) {
      console.error('发送者或接收者ID不存在', { senderId, receiverId });
      wx.showToast({
        title: '发送失败，用户信息错误',
        icon: 'none'
      });
      return;
    }

    const message = {
      type: 'chat', // 指定为chat类型
      receiverId: receiverId, // 接收者ID，就是对方的ID
      senderId: senderId, // 发送者ID
      content: content, // 消息内容
      contentType: type || 'text', // 内容类型
      timestamp: Date.now()
    };

    const messageStr = JSON.stringify(message);
    console.log('发送消息到服务器:', JSON.parse(messageStr));

    if (!socketOpen) {
      console.log('WebSocket未连接，尝试连接');
      wx.showToast({
        title: '连接中，请稍后',
        icon: 'none'
      });
      
      // 尝试重连
      this.connectWebSocket();
      
      // 加入队列
      socketMsgQueue.push(messageStr);
      return;
    }

    this.sendWebSocketMessage(messageStr);
  },

  // 发送已读回执
  sendReadReceipt(messageId) {
    if (!socketOpen) return;
    
    this.sendWebSocketMessage(JSON.stringify({
      type: 'message_status',
      messageId: messageId,
      status: 'read',
      userId: this.getCurrentUserId(),
      receiverId: this.data.otherUserId,
      conversationId: this.data.conversationId,
      timestamp: Date.now()
    }));
  },

  // 发送正在输入状态
  sendTypingStatus() {
    if (!socketOpen || !this.data.inputValue) return;
    
    this.sendWebSocketMessage(JSON.stringify({
      type: 'typing',
      userId: this.getCurrentUserId(),
      receiverId: this.data.otherUserId,
      conversationId: this.data.conversationId,
      timestamp: Date.now()
    }));
  },

  // ========== 消息发送相关方法 ==========

  // 发送文本消息
  sendTextMessage: function() {
    const content = this.data.inputValue.trim();
    if (!content) return;
    
    const messageId = 'msg_' + Date.now() + '_' + Math.random().toString(36).substr(2, 9);
    
    console.log('发送文本消息，ID:', messageId);
    
    // 创建本地消息
    const newMessage = {
      id: messageId,
      isMe: true,
      sender: 'user',
      senderId: this.getCurrentUserId(),
      contentType: 'text',
      type: 'text',
      content: content,
      timestamp: Date.now(),
      status: 'sending'
    };
    
    // 添加到列表
    this.addMessageToList(newMessage);
    
    // 清空输入框
    this.setData({
      inputValue: ''
    });
    
    // 通过WebSocket发送到服务器
    this.sendMessageToServer(content, 'text', messageId);
    
    // 模拟发送成功回调（实际应该通过WebSocket接收消息状态）
    setTimeout(() => {
      this.updateMessageStatus(messageId, 'success');
    }, 500);
  },

  // 上传图片后发送
  uploadImages: function(tempFilePaths) {
    tempFilePaths.forEach((tempFilePath, index) => {
      const fileName = `image_${Date.now()}_${index}.jpg`;
      this.uploadFile(tempFilePath, fileName, 0, 'image');
    });
  },

  // 上传视频后发送
  uploadVideo: function(tempFilePath, thumbPath) {
    const fileName = `video_${Date.now()}.mp4`;
    this.uploadFile(tempFilePath, fileName, 0, 'video', thumbPath);
  },

  // 通用文件上传
  uploadFile: function(tempFilePath, fileName, fileSize = 0, type = 'file', thumbPath = '') {
    const messageId = 'file_' + Date.now() + '_' + Math.random().toString(36).substr(2, 9);
    const message = {
      id: messageId,
      isMe: true,
      sender: 'user',
      type: type,
      contentType: type,
      content: tempFilePath,
      thumb: thumbPath,
      fileName: fileName,
      fileSize: fileSize,
      extension: fileName.split('.').pop().toLowerCase(),
      timestamp: Date.now(),
      status: 'uploading',
      progress: 0
    };
    
    this.addMessageToList(message);
    this.simulateUpload(messageId, type, tempFilePath);
  },

  // 上传
  simulateUpload: function(messageId, type, tempFilePath) {
    let progress = 0;
    const uploadInterval = setInterval(() => {
      progress += Math.random() * 20 + 10;
      
      if (progress >= 100) {
        progress = 100;
        clearInterval(uploadInterval);
        
        setTimeout(() => {
          // 上传完成，更新消息状态
          this.updateMessageStatus(messageId, 'success');
          
          const { messageList } = this.data;
          const index = messageList.findIndex(msg => msg.id === messageId);
          if (index !== -1) {
            delete messageList[index].progress;
            this.setData({ messageList });
            
            // 上传完成后，通过WebSocket发送消息
 
            const fileUrl = tempFilePath; // 上传后的URL
            this.sendMessageToServer(fileUrl, type, messageId);
          }
        }, 200);
      }
      
      const { messageList } = this.data;
      const index = messageList.findIndex(msg => msg.id === messageId);
      if (index !== -1) {
        messageList[index].progress = Math.min(Math.floor(progress), 100);
        this.setData({ messageList });
      }
    }, 100);
  },

  // 添加消息到列表
  addMessageToList: function(message) {
    const { messageList } = this.data;
    const processedMessage = this.processSingleMessageTime(message, messageList);
    
    messageList.push(processedMessage);
    
    this.setData({ messageList }, () => {
      this.scrollToBottom();
    });
  },

  // 更新消息状态
  updateMessageStatus: function(messageId, status) {
    const { messageList } = this.data;
    const index = messageList.findIndex(msg => msg.id === messageId);
    
    if (index !== -1) {
      messageList[index].status = status;
      this.setData({ messageList });
    }
  },


  
  // 输入处理（带防抖）
  onInput: function(e) {
    this.setData({
      inputValue: e.detail.value
    });
    
    // 发送正在输入状态（防抖）
    clearTimeout(this.typingDebounce);
    this.typingDebounce = setTimeout(() => {
      this.sendTypingStatus();
    }, 500);
  },

  // 输入框获得焦点
  onInputFocus: function() {
    this.setData({
      inputFocus: true
    }, () => {
      setTimeout(() => {
        this.scrollToBottom();
      }, 200);
    });
  },

  // 输入框失去焦点
  onInputBlur: function() {
    this.setData({
      inputFocus: false
    });
  },

  // 清除输入
  clearInput: function() {
    this.setData({
      inputValue: '',
      inputFocus: true
    });
  },

  // 滚动事件
  onScroll: function(e) {
    const scrollTop = e.detail.scrollTop;
    this.setData({
      lastScrollTop: scrollTop,
      isScrolling: true
    });
    
    clearTimeout(this.scrollTimer);
    this.scrollTimer = setTimeout(() => {
      this.setData({ isScrolling: false });
    }, 200);
    
    // 加载更多
    if (scrollTop <= 100 && !this.data.loadingMore && this.data.hasMore) {
      this.loadMoreMessages();
    }
  },

  // 滚动到底部
  scrollToBottom: function(animate = true) {
    if (this.data.isScrolling) return;
    
    this.setData({
      scrollAnimate: animate
    }, () => {
      setTimeout(() => {
        this.setData({
          scrollTop: 999999
        });
      }, 50);
    });
  },

  // 键盘高度变化
  onKeyboardHeightChange: function(res) {
    this.setData({
      keyboardHeight: res.height
    });
    
    if (res.height > 0) {
      this.setData({ showMediaSheet: false });
      
      setTimeout(() => {
        this.scrollToBottom();
      }, 100);
    }
  },

  // 显示多媒体选择面板
  showMediaActionSheet: function() {
    this.setData({
      showMediaSheet: true,
      inputFocus: false
    });
  },

  // 隐藏多媒体选择面板
  hideMediaActionSheet: function() {
    this.setData({
      showMediaSheet: false
    });
  },

  // 选择图片
  chooseImage: function() {
    this.hideMediaActionSheet();
    
    wx.chooseImage({
      count: 9,
      sizeType: ['compressed'],
      sourceType: ['album'],
      success: (res) => {
        this.uploadImages(res.tempFilePaths);
      },
      fail: () => {
        wx.showToast({
          title: '选择图片失败',
          icon: 'none'
        });
      }
    });
  },

  // 选择视频
  chooseVideo: function() {
    this.hideMediaActionSheet();
    
    wx.chooseVideo({
      sourceType: ['album'],
      compressed: true,
      maxDuration: 60,
      success: (res) => {
        this.uploadVideo(res.tempFilePath, res.thumbTempFilePath);
      },
      fail: () => {
        wx.showToast({
          title: '选择视频失败',
          icon: 'none'
        });
      }
    });
  },

  // 预览图片
  previewImage: function(e) {
    const url = e.currentTarget.dataset.url;
    wx.previewImage({
      current: url,
      urls: [url]
    });
  },

  // 设置今天日期
  setTodayDate: function() {
    const now = new Date();
    const month = now.getMonth() + 1;
    const date = now.getDate();
    const week = ['日', '一', '二', '三', '四', '五', '六'][now.getDay()];
    this.setData({
      todayDate: `${month}月${date}日 星期${week}`
    });
  },

  // 处理消息时间显示
  processMessageTimes: function(messages) {
    if (!messages || messages.length === 0) return [];
    
    const sortedMessages = [...messages].sort((a, b) => a.timestamp - b.timestamp);
    const processedMessages = [];
    let lastShowTime = null;
    
    for (let i = 0; i < sortedMessages.length; i++) {
      const msg = { ...sortedMessages[i] };
      
      if (i === 0) {
        msg.showTime = true;
        lastShowTime = msg.timestamp;
      } else {
        const timeDiffMinutes = (msg.timestamp - lastShowTime) / (1000 * 60);
        msg.showTime = timeDiffMinutes >= this.data.timeInterval;
        if (msg.showTime) lastShowTime = msg.timestamp;
      }
      
      processedMessages.push(msg);
    }
    
    if (lastShowTime) {
      this.setData({ lastShowTimeStamp: lastShowTime });
    }
    
    return processedMessages;
  },

  // 处理单条消息时间
  processSingleMessageTime: function(message, messageList) {
    const msg = { ...message };
    
    if (messageList.length === 0) {
      msg.showTime = true;
      this.setData({ lastShowTimeStamp: msg.timestamp });
      return msg;
    }
    
    const lastShowTime = this.data.lastShowTimeStamp;
    const timeDiffMinutes = (msg.timestamp - lastShowTime) / (1000 * 60);
    
    msg.showTime = timeDiffMinutes >= this.data.timeInterval;
    if (msg.showTime) {
      this.setData({ lastShowTimeStamp: msg.timestamp });
    }
    
    return msg;
  },

  // 格式化时间
  formatTime: function(timestamp) {
    if (!timestamp) return '';
    
    const date = new Date(Number(timestamp));
    const hours = date.getHours().toString().padStart(2, '0');
    const minutes = date.getMinutes().toString().padStart(2, '0');
    return `${hours}:${minutes}`;
  },

  // 格式化文件大小
  formatFileSize: function(bytes) {
    if (!bytes || bytes === 0) return '0B';
    
    const units = ['B', 'KB', 'MB', 'GB'];
    let size = bytes;
    let unitIndex = 0;
    
    while (size >= 1024 && unitIndex < units.length - 1) {
      size /= 1024;
      unitIndex++;
    }
    
    return size.toFixed(1) + units[unitIndex];
  },

  // 播放提示音
  playNotificationSound() {
    try {
      const innerAudioContext = wx.createInnerAudioContext();
      innerAudioContext.src = '/assets/sounds/notification.mp3';
      innerAudioContext.play();
      
      innerAudioContext.onEnded(() => {
        innerAudioContext.destroy();
      });
    } catch (e) {
      console.log('播放提示音失败:', e);
    }
  },

  // 阻止事件冒泡
  stopPropagation: function() {}
});