ykt-wxapp/utils/tim-chat.js

// 引入腾讯IM SDK
import TIM from 'tim-wx-sdk'
import TIMUploadPlugin from 'tim-upload-plugin'
import api from './api.js'

const env = __VITE_ENV__;

// 腾讯IM配置 - SDKAppID 必须是 number 类型，使用 Number() 转换
const TIM_CONFIG = {
	SDKAppID: Number(env.MP_TIM_SDK_APP_ID), // 患者端 IM SDKAppID
}

// 验证配置
if (!TIM_CONFIG.SDKAppID || isNaN(TIM_CONFIG.SDKAppID)) {
	console.error('❌ TIM SDK配置错误: MP_TIM_SDK_APP_ID未定义或无效', {
		envValue: env.MP_TIM_SDK_APP_ID,
		parsedValue: TIM_CONFIG.SDKAppID
	})
}

// IM连接配置常量
const IM_CONNECTION_CONFIG = {
	MAX_RECONNECT_ATTEMPTS: 10,           // 最大重连次数
	RECONNECT_DELAYS: [2000, 4000, 8000, 16000, 30000], // 重连延迟（指数退避）
	LOGIN_COOLDOWN: 5000,                  // 登录冷却时间
	SDK_READY_TIMEOUT: 15000,              // SDK就绪超时时间
	LOGIN_CHECK_INTERVAL_STABLE: 60000,    // 稳定状态检查间隔
	LOGIN_CHECK_INTERVAL_UNSTABLE: 15000,  // 不稳定状态检查间隔
	LOGIN_CHECK_FIRST_DELAY: 30000,        // 首次检查延迟
	HEARTBEAT_INTERVAL: 60000,             // 心跳间隔（毫秒）60秒
	HEARTBEAT_MAX_FAIL: 3,                 // 心跳最大失败次数
	NETWORK_RECONNECT_DELAY: 2000,         // 网络恢复后延迟重连
	MESSAGE_BATCH_COUNT: 20,               // 每批消息数量
	MAX_MESSAGE_REQUESTS: 50,              // 最大消息请求次数
	MAX_CACHE_SIZE: 1000,                  // 最大缓存消息数
	TIM_INSTANCE_READY_CHECK_INTERVAL: 100 // TIM实例就绪检查间隔
}

class TimChatManager {
	constructor() {
		// TIM实例和会话
		this.tim = null
		this.conversation = null

		// 用户信息
		this.currentUserID = ''
		this.currentUserSig = ''

		// 消息管理
		this.messageList = []
		this.currentConversationID = null

		// 分页加载相关状态
		this.nextReqMessageID = ""
		this.isCompleted = false
		this.isLoadingMore = false

		// 状态标志
		this.isLoading = false
		this.isLoggedIn = false
		this.isInitializing = false
		this.isLoggingIn = false

		// 定时器
		this.loginCheckInterval = null
		this.heartbeatInterval = null
		this.networkReconnectTimer = null

		// 重连管理
		this.reconnectAttempts = 0
		this.maxReconnectAttempts = IM_CONNECTION_CONFIG.MAX_RECONNECT_ATTEMPTS
		this.reconnectDelays = IM_CONNECTION_CONFIG.RECONNECT_DELAYS
		this.lastLoginTime = 0
		this.loginCooldown = IM_CONNECTION_CONFIG.LOGIN_COOLDOWN

		// 心跳管理
		this.heartbeatFailCount = 0

		// 回调函数
		this.callbacks = {
			onMessageReceived: null,
			onMessageSent: null,
			onSDKReady: null,
			onSDKNotReady: null,
			onError: null,
			onLoginStatusChanged: null,
			onConversationListUpdated: null
		}

		// 绑定事件处理函数
		this.boundEventHandlers = {
			onSDKReady: this.onSDKReady.bind(this),
			onSDKNotReady: this.onSDKNotReady.bind(this),
			onMessageReceived: this.onMessageReceived.bind(this),
			onMessageSentSucceeded: this.onMessageSentSucceeded.bind(this),
			onMessageSentFailed: this.onMessageSentFailed.bind(this),
			onConversationListUpdated: this.onConversationListUpdated.bind(this),
			onNetStateChange: this.onNetStateChange.bind(this),
			onKickedOut: this.onKickedOut.bind(this)
		}
	}

	// ============== 资源管理方法 ==============

	// 清理所有定时器
	clearAllTimers() {
		if (this.loginCheckInterval) {
			clearTimeout(this.loginCheckInterval)
			clearInterval(this.loginCheckInterval)
			this.loginCheckInterval = null
		}

		if (this.heartbeatInterval) {
			clearInterval(this.heartbeatInterval)
			this.heartbeatInterval = null
		}

		if (this.networkReconnectTimer) {
			clearTimeout(this.networkReconnectTimer)
			this.networkReconnectTimer = null
		}

		console.log('所有定时器已清理')
	}

	// 清理缓存（已弃用缓存功能）
	cleanupCache() {
		// 缓存功能已移除
	}

	// 重置所有状态
	resetAllStates() {
		this.isLoggedIn = false
		this.isLoggingIn = false
		this.isInitializing = false
		this.reconnectAttempts = 0
		this.lastLoginTime = 0
		this.heartbeatFailCount = 0
	}

	// ============== 初始化方法 ==============

	// 初始化腾讯IM
	async initTIM(userID = null) {
		if (this.isInitializing) {
			console.log('IM正在初始化中，跳过重复初始化')
			return false
		}

		this.isInitializing = true
		console.log('=== 开始初始化IM ===')

		try {
			// 重置重连次数，允许重新登录
			this.reconnectAttempts = 0

			// 如果存在旧的TIM实例，先完整清理
			if (this.tim) {
				console.log('检测到旧的TIM实例，开始清理...')
				await this.cleanupOldInstance()
			}

			if (!TIM) {
				throw new Error('TIM SDK 未正确导入')
			}
			// 验证 SDKAppID
			if (!TIM_CONFIG.SDKAppID || isNaN(TIM_CONFIG.SDKAppID)) {
				throw new Error(`TIM SDK配置错误: SDKAppID无效 (${TIM_CONFIG.SDKAppID})，请检查环境变量 MP_TIM_SDK_APP_ID`)
			}

			console.log('创建TIM实例，SDKAppID:', TIM_CONFIG.SDKAppID)
			this.tim = TIM.create({ SDKAppID: TIM_CONFIG.SDKAppID })

			// 等待TIM实例初始化完成
			await this.waitForTIMInstanceReady()

			// 注册上传插件
			this.tim.registerPlugin({ "tim-upload-plugin": TIMUploadPlugin })
			console.log('上传插件已注册')

			// 注册事件监听器
			this.registerEventListeners()

			// 设置日志级别
			if (typeof this.tim.setLogLevel === 'function') {
				this.tim.setLogLevel(0)
			}

			// 获取用户信息并登录
			await this.getUserInfoAndLogin(userID)

			// 等待SDK Ready
			console.log('等待SDK Ready...')
			await this.waitForSDKReady(IM_CONNECTION_CONFIG.SDK_READY_TIMEOUT)

			console.log('=== IM初始化完成 ===')
			return true

		} catch (error) {
			console.error('=== IM初始化失败 ===', error)
			this.triggerCallback('onError', `初始化失败: ${error.message || error}`)

			// 初始化失败时清理资源
			await this.cleanupOldInstance()
			return false
		} finally {
			this.isInitializing = false
		}
	}

	// 清理旧的TIM实例
	async cleanupOldInstance() {
		try {
			// 清理所有定时器
			this.clearAllTimers()

			// 移除事件监听器
			this.removeEventListeners()

			// 登出
			if (this.tim && this.tim.isLoggedIn) {
				try {
					await this.tim.logout()
					console.log('已登出旧实例')
				} catch (err) {
					console.warn('登出旧实例失败:', err)
				}
			}

			// 清理实例
			this.tim = null

			// 重置状态
			this.resetAllStates()

			console.log('旧实例清理完成')
		} catch (error) {
			console.error('清理旧实例时出错:', error)
		}
	}

	// 等待TIM实例准备就绪
	waitForTIMInstanceReady() {
		return new Promise((resolve, reject) => {
			const startTime = Date.now()
			const timeout = 10000 // 10秒超时

			const checkReady = () => {
				if (this.tim && typeof this.tim.on === 'function') {
					console.log('TIM实例已就绪')
					resolve()
				} else if (Date.now() - startTime > timeout) {
					reject(new Error('等待TIM实例就绪超时'))
				} else {
					setTimeout(checkReady, IM_CONNECTION_CONFIG.TIM_INSTANCE_READY_CHECK_INTERVAL)
				}
			}

			checkReady()
		})
	}

	// 等待SDK Ready（优化版：更好的超时处理）
	waitForSDKReady(timeout = IM_CONNECTION_CONFIG.SDK_READY_TIMEOUT) {
		return new Promise((resolve, reject) => {
			const startTime = Date.now()
			const checkInterval = 1000 // 每秒检查一次
			let checkCount = 0

			const checkSDKReady = () => {
				checkCount++
				const elapsed = Date.now() - startTime

				if (this.isLoggedIn) {
					console.log(`✓ SDK已Ready（耗时${elapsed}ms，检查${checkCount}次）`)
					resolve()
				} else if (elapsed > timeout) {
					const error = new Error(`等待SDK Ready超时（${timeout}ms）`)
					console.error('✗', error.message)
					// 超时不算致命错误，尝试继续
					resolve()
				} else {
					console.log(`等待SDK Ready... ${Math.floor(elapsed / 1000)}/${Math.floor(timeout / 1000)}秒`)
					setTimeout(checkSDKReady, checkInterval)
				}
			}

			// 立即开始第一次检查
			checkSDKReady()
		})
	}

	// 注册事件监听器
	registerEventListeners() {
		if (!this.tim || !TIM.EVENT) return

		try {
			// 检查TIM实例是否已经初始化完成
			if (!this.tim || typeof this.tim.on !== 'function') {
				console.log('TIM实例未准备好，延迟注册事件监听器')
				setTimeout(() => this.registerEventListeners(), 100)
				return
			}

			// 逐个注册事件监听器，如果某个注册失败则继续注册其他的
			const events = [
				{ event: TIM.EVENT.SDK_READY, handler: this.boundEventHandlers.onSDKReady },
				{ event: TIM.EVENT.SDK_NOT_READY, handler: this.boundEventHandlers.onSDKNotReady },
				{ event: TIM.EVENT.MESSAGE_RECEIVED, handler: this.boundEventHandlers.onMessageReceived },
				{ event: TIM.EVENT.MESSAGE_SENT_SUCCEEDED, handler: this.boundEventHandlers.onMessageSentSucceeded },
				{ event: TIM.EVENT.MESSAGE_SENT_FAILED, handler: this.boundEventHandlers.onMessageSentFailed },
				{ event: TIM.EVENT.CONVERSATION_LIST_UPDATED, handler: this.boundEventHandlers.onConversationListUpdated },
				{ event: TIM.EVENT.NET_STATE_CHANGE, handler: this.boundEventHandlers.onNetStateChange },
				{ event: TIM.EVENT.KICKED_OUT, handler: this.boundEventHandlers.onKickedOut }
			]

			events.forEach(({ event, handler }) => {
				if (event && handler && typeof this.tim.on === 'function') {
					try {
						this.tim.on(event, handler)
					} catch (error) {
						console.error(`注册事件监听器失败 ${event}:`, error)
					}
				}
			})

			console.log('TIM事件监听器注册完成')
		} catch (error) {
			console.error('注册TIM事件监听器失败:', error)
		}
	}

	// 移除事件监听器
	removeEventListeners() {
		if (!this.tim || !TIM.EVENT) return

		try {
			// 检查TIM实例是否还有off方法
			if (typeof this.tim.off !== 'function') return

			// 逐个移除事件监听器，如果某个移除失败则继续移除其他的
			const events = [
				{ event: TIM.EVENT.SDK_READY, handler: this.boundEventHandlers.onSDKReady },
				{ event: TIM.EVENT.SDK_NOT_READY, handler: this.boundEventHandlers.onSDKNotReady },
				{ event: TIM.EVENT.MESSAGE_RECEIVED, handler: this.boundEventHandlers.onMessageReceived },
				{ event: TIM.EVENT.MESSAGE_SENT_SUCCEEDED, handler: this.boundEventHandlers.onMessageSentSucceeded },
				{ event: TIM.EVENT.MESSAGE_SENT_FAILED, handler: this.boundEventHandlers.onMessageSentFailed },
				{ event: TIM.EVENT.CONVERSATION_LIST_UPDATED, handler: this.boundEventHandlers.onConversationListUpdated },
				{ event: TIM.EVENT.NET_STATE_CHANGE, handler: this.boundEventHandlers.onNetStateChange }
			]

			events.forEach(({ event, handler }) => {
				if (event && handler && typeof this.tim.off === 'function') {
					try {
						this.tim.off(event, handler)
					} catch (error) {
						console.error(`移除事件监听器失败 ${event}:`, error)
					}
				}
			})
		} catch (error) {
			console.error('移除TIM事件监听器失败:', error)
		}
	}

	// 获取用户信息并登录
	async getUserInfoAndLogin(userID) {
		try {
			if (userID) {
				this.currentUserID = userID
				uni.setStorageSync('userInfo', { userID })
			} else {
				const userInfo = uni.getStorageSync('userInfo')
				if (!userInfo?.userID) {
					throw new Error('未找到用户信息，请先登录')
				}
				this.currentUserID = userInfo.userID
			}

			this.currentUserSig = await this.getUserSig(this.currentUserID)
			await this.loginTIM()
		} catch (error) {
			console.error('获取用户信息失败:', error)
			this.triggerCallback('onError', `登录失败: ${error.message || error}`)
			throw error // 重新抛出错误，让调用者知道登录失败
		}
	}

	// 获取 userSig
	async getUserSig(userID) {
		try {
			const response = await api('getUserSig', { userId: userID })
			if (response?.success && response?.data) {
				return response.data
			}
			throw new Error('获取 userSig 失败: 接口返回数据格式错误')
		} catch (error) {
			console.error('获取UserSig失败:', error)
			throw error
		}
	}

	// 登录腾讯IM
	loginTIM() {
		return new Promise((resolve, reject) => {
			if (this.isLoggingIn) {
				reject(new Error('正在登录中'))
				return
			}

			const now = Date.now()
			if (now - this.lastLoginTime < this.loginCooldown) {
				reject(new Error('登录冷却中'))
				return
			}

			if (this.isLoggedIn) {
				resolve()
				return
			}

			this.isLoggingIn = true
			this.lastLoginTime = now

			console.log('开始登录腾讯IM，userID:', this.currentUserID)
			this.tim.login({
				userID: this.currentUserID,
				userSig: this.currentUserSig
			}).then(() => {
				console.log('腾讯IM登录请求成功，等待SDK_READY事件...')
				this.isLoggingIn = false
				// 不在这里设置 isLoggedIn = true，等待 onSDKReady 事件
				this.reconnectAttempts = 0

				// 触发登录状态变化回调（登录中状态）
				this.triggerCallback('onLoginStatusChanged', {
					isLoggedIn: false,
					userID: this.currentUserID,
					reason: 'LOGIN_REQUESTED',
					message: '登录请求成功，等待SDK就绪...'
				})
				resolve()
			}).catch(error => {
				console.error('腾讯IM登录失败:', error)
				this.isLoggingIn = false
				this.triggerCallback('onLoginStatusChanged', {
					isLoggedIn: false,
					error,
					reason: 'LOGIN_FAILED'
				})
				reject(error)
			})
		})
	}

	// ============== 连接监控方法 ==============

	// 启动登录状态检测（优化版：使用配置常量）
	startLoginStatusCheck() {
		this.stopLoginStatusCheck()

		// 根据连接稳定性动态调整检查间隔
		const getCheckInterval = () => {
			if (this.reconnectAttempts > 0) {
				return IM_CONNECTION_CONFIG.LOGIN_CHECK_INTERVAL_UNSTABLE
			}
			return IM_CONNECTION_CONFIG.LOGIN_CHECK_INTERVAL_STABLE
		}

		const checkStatus = () => {
			// 如果已达到最大重连次数（被踢下线），停止检查
			if (this.reconnectAttempts >= this.maxReconnectAttempts) {
				console.log('⚠️ 已被踢下线或达到最大重连次数，停止登录状态检查')
				return
			}

			// 如果正在登录中，跳过本次检查
			if (this.isLoggingIn) {
				this.loginCheckInterval = setTimeout(checkStatus, getCheckInterval())
				return
			}

			const isLoggedIn = this.checkLoginStatus()

			// 如果未登录且有用户ID，尝试重连
			if (!isLoggedIn && this.currentUserID && !this.isLoggingIn) {
				console.log('📡 登录状态检测：发现未登录，尝试重连')
				this.attemptReconnect()
			} else if (isLoggedIn) {
				// 登录正常，重置重连计数
				if (this.reconnectAttempts > 0) {
					console.log('✓ 登录状态检测：连接已恢复正常')
					this.reconnectAttempts = 0
				}

				// 定期清理缓存
				this.cleanupCache()
			}

			// 重新调度下一次检查（再次检查，防止在检查过程中被踢下线）
			if (this.reconnectAttempts < this.maxReconnectAttempts) {
				this.loginCheckInterval = setTimeout(checkStatus, getCheckInterval())
			}
		}

		// 首次检查延迟
		const firstDelay = IM_CONNECTION_CONFIG.LOGIN_CHECK_FIRST_DELAY
		this.loginCheckInterval = setTimeout(checkStatus, firstDelay)
		console.log(`🔍 登录状态检测已启动，首次检查将在${firstDelay / 1000}秒后进行`)
	}

	// 停止登录状态检测
	stopLoginStatusCheck() {
		if (this.loginCheckInterval) {
			clearTimeout(this.loginCheckInterval)
			clearInterval(this.loginCheckInterval)
			this.loginCheckInterval = null
		}
	}

	// 检查登录状态
	checkLoginStatus() {
		if (!this.tim) return false

		try {
			// 【修复】优先信任已设置的登录状态，只有在明确检测到未登录时才更新
			// 如果已经标记为登录状态，不应该被轻易覆盖
			if (this.isLoggedIn) {
				// 只在已登录状态下，通过 SDK 再次验证
				let sdkLoginStatus = true // 默认保持登录状态

				if (typeof this.tim.getLoginStatus === 'function') {
					try {
						const status = this.tim.getLoginStatus()
						// 只有明确检测到未登录状态才更新
						if (status === TIM.TYPES.NOT_LOGGED_IN || status === TIM.TYPES.KICKED_OUT) {
							sdkLoginStatus = false
							console.warn('SDK 检测到未登录状态:', status)
						}
					} catch (e) {
						console.error('获取 SDK 登录状态失败:', e)
						// 出错时保持当前状态
					}
				}

				// 只有 SDK 明确返回未登录时才更新状态
				if (!sdkLoginStatus) {
					this.isLoggedIn = false
					this.triggerCallback('onLoginStatusChanged', {
						isLoggedIn: false,
						userID: this.currentUserID,
						reason: 'SDK_STATUS_CHECK'
					})
					return false
				}

				// 保持登录状态
				return true
			}

			// 如果当前是未登录状态，检查 SDK 是否已登录
			let loginStatus = false

			if (typeof this.tim.isLoggedIn === 'boolean') {
				loginStatus = this.tim.isLoggedIn
			} else if (typeof this.tim.getLoginStatus === 'function') {
				const status = this.tim.getLoginStatus()
				loginStatus = status === TIM.TYPES.LOGINED || status === TIM.TYPES.LOGGING_IN
			}

			// 只有在检测到登录状态变化时才更新
			if (loginStatus && !this.isLoggedIn) {
				this.isLoggedIn = true
				this.triggerCallback('onLoginStatusChanged', {
					isLoggedIn: true,
					userID: this.currentUserID,
					reason: 'SDK_STATUS_CHECK'
				})
			}

			return loginStatus
		} catch (error) {
			console.error('检查IM登录状态失败:', error)
			// 出错时返回当前状态，不改变状态
			return this.isLoggedIn
		}
	}

	// 尝试重新连接（优化版：更智能的重连策略）
	async attemptReconnect() {
		// 如果已达到最大重连次数（包括被踢下线的情况），停止重连
		if (this.reconnectAttempts >= this.maxReconnectAttempts) {
			console.log('⚠️ 已达到最大重连次数或被踢下线，停止自动重连')
			return false
		}

		if (this.isLoggingIn) {
			console.log('正在登录中，跳过重连')
			return false
		}

		// 先检查是否真的需要重连
		if (this.tim && this.isLoggedIn) {
			console.log('IM已登录，无需重连')
			this.reconnectAttempts = 0
			return true
		}

		const now = Date.now()
		const delayIndex = Math.min(this.reconnectAttempts, this.reconnectDelays.length - 1)
		const reconnectDelay = this.reconnectDelays[delayIndex]
		const timeSinceLastLogin = now - this.lastLoginTime

		// 只有非首次重连才需要检查冷却时间
		if (this.reconnectAttempts > 0 && timeSinceLastLogin < reconnectDelay) {
			const remainingTime = reconnectDelay - timeSinceLastLogin
			console.log(`重连冷却中，剩余时间：${Math.ceil(remainingTime / 1000)}秒`)

			// 安排下次重连
			setTimeout(() => {
				if (!this.isLoggedIn && !this.isLoggingIn && this.reconnectAttempts < this.maxReconnectAttempts) {
					this.attemptReconnect()
				}
			}, remainingTime)

			return false
		}

		if (this.reconnectAttempts >= this.maxReconnectAttempts) {
			console.error('达到最大重连次数，停止自动重连')
			this.triggerCallback('onError', 'IM连接失败，请检查网络或手动刷新页面')
			return false
		}

		this.reconnectAttempts++
		console.log(`第${this.reconnectAttempts}次重连尝试（最多${this.maxReconnectAttempts}次）`)

		try {
			if (this.tim && !this.isLoggedIn) {
				console.log('TIM实例存在但未登录，尝试登录...')
				await this.loginTIM()
				console.log('重连成功！')
				this.reconnectAttempts = 0  // 重置重连次数
				return true
			}

			if (!this.tim) {
				console.log('TIM实例不存在，重新初始化...')
				await this.initTIM(this.currentUserID)
				console.log('重新初始化并登录成功！')
				this.reconnectAttempts = 0
				return true
			}

			return false
		} catch (error) {
			console.error(`第${this.reconnectAttempts}次重连失败:`, error)

			// 如果还有重连机会，自动安排下一次重连
			if (this.reconnectAttempts < this.maxReconnectAttempts) {
				const nextDelay = this.reconnectDelays[Math.min(this.reconnectAttempts, this.reconnectDelays.length - 1)]
				console.log(`${nextDelay / 1000}秒后进行第${this.reconnectAttempts + 1}次重连...`)
				setTimeout(() => {
					if (!this.isLoggedIn && !this.isLoggingIn && this.reconnectAttempts < this.maxReconnectAttempts) {
						this.attemptReconnect()
					}
				}, nextDelay)
			}

			return false
		}
	}

	// SDK Ready 事件
	onSDKReady() {
		console.log('腾讯IM SDK Ready')
		this.isLoggedIn = true
		this.triggerCallback('onSDKReady')
		this.triggerCallback('onLoginStatusChanged', {
			isLoggedIn: true,
			reason: 'SDK_READY'
		})
		this.startLoginStatusCheck()
		this.startHeartbeat()  // 启动心跳检测
	}

	// SDK Not Ready 事件
	onSDKNotReady() {
		console.log('腾讯IM SDK Not Ready')
		this.isLoggedIn = false
		this.triggerCallback('onSDKNotReady')
		this.triggerCallback('onLoginStatusChanged', {
			isLoggedIn: false,
			reason: 'SDK_NOT_READY'
		})
		this.stopLoginStatusCheck()
		this.stopHeartbeat()  // 停止心跳检测
	}

	// 收到新消息
	onMessageReceived(event) {
		event.data.forEach(message => {
			const existingMessage = this.messageList.find(msg => msg.ID === message.ID)
			if (existingMessage) return
			if (!this.filterMessage(message)) return
			const convertedMessage = this.convertMessageFormat(message)
			if (!convertedMessage.conversationID) {
				convertedMessage.conversationID = message.conversationID
			}

			// 获取消息所属的会话ID
			const messageConversationID = convertedMessage.conversationID

			console.log('收到新消息:', {
				messageID: convertedMessage.ID,
				messageConversationID: messageConversationID,
				currentConversationID: this.currentConversationID,
				messageType: convertedMessage.type,
				from: convertedMessage.from
			})
			// 判断是否为当前会话的消息（必须有currentConversationID且匹配才显示）
			const isCurrentConversation = this.currentConversationID &&
				messageConversationID === this.currentConversationID
			console.log('消息会话匹配检查:', {
				isCurrentConversation,
				hasCurrentConversationID: !!this.currentConversationID,
				conversationIDMatch: messageConversationID === this.currentConversationID
			})
			if (isCurrentConversation) {
				// 当前会话的消息，触发回调
				console.log('✓ 消息属于当前会话，触发显示')
				this.triggerCallback('onMessageReceived', convertedMessage)
				// 处理已读状态
				if (this.currentConversationID) {
					this.markConversationAsRead(this.currentConversationID)
				}
				this.triggerCallback('onConversationListUpdated', {
					reason: 'NEW_MESSAGE_RECEIVED_IN_CURRENT_CONVERSATION',
					conversation: {
						conversationID: messageConversationID || this.currentConversationID,
						lastMessage: this.formatLastMessage(convertedMessage),
						lastMessageTime: convertedMessage.lastTime,
						unreadCount: 0,
						messageType: convertedMessage.type,
						messageFlow: convertedMessage.flow
					},
					message: convertedMessage
				})
			} else {
				// 非当前会话的消息，只更新会话列表
				console.log('✗ 消息不属于当前会话，已过滤不显示，仅更新会话列表', {
					messageConversationID,
					currentConversationID: this.currentConversationID
				})
				this.updateConversationListOnNewMessage(convertedMessage)
			}
		})
	}

	// 消息发送成功
	onMessageSentSucceeded(event) {
		const messageID = event.data.ID
		const sentMessage = event.data.message

		// 更新messageList中的消息状态
		const message = this.messageList.find(msg => msg.ID === messageID)
		if (message) {
			message.status = 'success'
			// 如果服务器返回了真实的消息ID，更新它
			if (sentMessage && sentMessage.ID && sentMessage.ID !== messageID) {
				message.ID = sentMessage.ID
			}
		}

		// 缓存功能已移除

		this.triggerCallback('onMessageSent', {
			messageID,
			status: 'success'
		})
	}

	// 消息发送失败
	onMessageSentFailed(event) {
		const messageID = event.data.ID

		// 更新messageList中的消息状态
		const message = this.messageList.find(msg => msg.ID === messageID)
		if (message) {
			message.status = 'failed'
		}

		// 缓存功能已移除

		this.triggerCallback('onMessageSent', {
			messageID,
			status: 'failed'
		})
		this.triggerCallback('onError', `发送失败: ${event.data.error || '未知错误'}`)
	}

	// 会话列表更新
	onConversationListUpdated(event) {
		this.triggerCallback('onConversationListUpdated', event.data)
	}

	// 网络状态变化（优化版：更稳定的处理）
	onNetStateChange(event) {
		const netState = event.data.netState

		console.log('🌐 网络状态变化:', netState)

		// 清理之前的网络重连定时器
		if (this.networkReconnectTimer) {
			clearTimeout(this.networkReconnectTimer)
			this.networkReconnectTimer = null
		}

		if (netState === TIM.TYPES.NET_STATE_CONNECTED) {
			console.log('✓ 网络已连接，延迟检查IM状态以确保稳定')

			// 网络恢复后延迟再检查，避免网络还不稳定时立即重连
			const delay = IM_CONNECTION_CONFIG.NETWORK_RECONNECT_DELAY
			this.networkReconnectTimer = setTimeout(() => {
				if (this.tim && !this.isLoggedIn && !this.isLoggingIn) {
					console.log('🔄 网络已稳定，开始重连')
					this.ensureIMConnection()
				} else if (this.isLoggedIn) {
					console.log('✓ 网络已稳定，IM连接正常')
				}
				this.networkReconnectTimer = null
			}, delay)

			// 重置重连次数（网络恢复后给更多机会）
			if (this.reconnectAttempts > 0) {
				console.log(`重置重连次数（之前: ${this.reconnectAttempts}）`)
				this.reconnectAttempts = 0
			}

		} else if (netState === TIM.TYPES.NET_STATE_CONNECTING) {
			console.log('🔗 网络连接中，等待稳定...')

		} else if (netState === TIM.TYPES.NET_STATE_DISCONNECTED) {
			console.log('⚠️ 网络断开（暂不标记为未登录，等待心跳检测判断）')

			// 网络断开时不立即设置 isLoggedIn = false
			// 因为可能只是短暂的网络波动，让心跳检测来判断是否真的断线

			this.triggerCallback('onLoginStatusChanged', {
				isLoggedIn: this.isLoggedIn,
				reason: 'NETWORK_DISCONNECTED',
				message: '网络波动，将自动重连'
			})
		}
	}

	// 被踢下线处理
	onKickedOut(event) {
		console.log('⚠️ 账号被踢下线:', event.data)

		// 更新登录状态
		this.isLoggedIn = false
		this.isLoggingIn = false

		// 停止所有定时器（防止自动重连）
		this.clearAllTimers()
		this.stopLoginStatusCheck()
		this.stopHeartbeat()

		// 清除重连相关状态，阻止重连
		this.reconnectAttempts = this.maxReconnectAttempts // 设置为最大值，阻止重连

		// 触发登录状态变化回调
		this.triggerCallback('onLoginStatusChanged', {
			isLoggedIn: false,
			reason: 'KICKED_OUT',
			message: '您的账号在其他设备登录'
		})

		// 显示提示弹框
		uni.showModal({
			title: '提示',
			content: '您的账号在其他设备登录，您已被踢下线',
			showCancel: false,
			confirmText: '确定',
			success: () => {
				// 清理本地缓存并跳转到登录页
				uni.removeStorageSync('token')
				uni.removeStorageSync('refreshToken')
				uni.removeStorageSync('account')
				uni.removeStorageSync('openid')
				uni.reLaunch({
					url: '/pages-center/login/login'
				})
			}
		})
	}

	// 手动检测并重连IM
	async ensureIMConnection() {
		if (this.isLoggingIn || !this.tim) return true

		const isLoggedIn = this.checkLoginStatus()
		if (!isLoggedIn && this.currentUserID) {
			return await this.attemptReconnect()
		}
		return true
	}

	startHeartbeat() {
		this.stopHeartbeat()

		// 心跳失败计数器
		this.heartbeatFailCount = 0
		const MAX_HEARTBEAT_FAIL = IM_CONNECTION_CONFIG.HEARTBEAT_MAX_FAIL
		const INTERVAL = IM_CONNECTION_CONFIG.HEARTBEAT_INTERVAL

		// 定时心跳检测
		this.heartbeatInterval = setInterval(() => {
			// 如果已达到最大重连次数（被踢下线），停止心跳检测
			if (this.reconnectAttempts >= this.maxReconnectAttempts) {
				console.log('⚠️ 已被踢下线或达到最大重连次数，停止心跳检测')
				this.stopHeartbeat()
				return
			}

			// 只在已登录状态下进行心跳检测
			if (!this.tim || !this.isLoggedIn) {
				console.log('⏸ 心跳检测：未登录，跳过检测')
				return
			}

			// 确保方法存在
			if (typeof this.tim.getConversationList !== 'function') {
				console.log('⏸ 心跳检测：SDK方法不可用，跳过检测')
				return
			}

			this.tim.getConversationList()
				.then(() => {
					if (this.heartbeatFailCount > 0) {
						console.log(`<EFBFBD> 心跳恢复正常（之前失败${this.heartbeatFailCount}次）`)
					}
					this.heartbeatFailCount = 0  // 重置失败计数
				})
				.catch((error) => {
					// 如果是SDK未就绪错误，不计入失败次数（这是临时状态）
					if (error && error.message && error.message.includes('sdk not ready')) {
						console.log('⏸ 心跳检测：SDK未就绪，跳过本次检测')
						return
					}

					this.heartbeatFailCount++
					console.error(`💔 心跳失败 (${this.heartbeatFailCount}/${MAX_HEARTBEAT_FAIL}):`, error.message)

					// 只有连续失败多次才认为真的断线
					if (this.heartbeatFailCount >= MAX_HEARTBEAT_FAIL) {
						console.log('❌ 心跳连续失败，标记为未登录并尝试重连')
						this.isLoggedIn = false
						this.heartbeatFailCount = 0
						// 只有未被踢下线才尝试重连
						if (this.reconnectAttempts < this.maxReconnectAttempts) {
							this.attemptReconnect()
						}
					}
				})
		}, INTERVAL)

		console.log(`💓 心跳检测已启动（间隔${INTERVAL / 1000}秒，最多失败${MAX_HEARTBEAT_FAIL}次）`)
	}

	// 停止心跳检测
	stopHeartbeat() {
		if (this.heartbeatInterval) {
			clearInterval(this.heartbeatInterval)
			this.heartbeatInterval = null
			console.log('IM心跳检测已停止')
		}
	}

	// 获取会话列表
	getConversationList() {
		if (!this.tim) {
			console.error('TIM实例不存在，无法获取会话列表')
			return
		}

		if (!this.isLoggedIn) {
			console.log('SDK未ready，等待SDK初始化后再获取会话列表...')
			// 等待SDK就绪
			const checkSDKReady = () => {
				if (this.isLoggedIn) {
					console.log('SDK已ready，开始获取会话列表')
					this.getConversationList()
				} else {
					setTimeout(checkSDKReady, 500)
				}
			}
			setTimeout(checkSDKReady, 500)
			return
		}
	}

	// 获取群聊列表
	getGroupList() {
		return new Promise((resolve, reject) => {
			if (!this.tim) {
				reject(new Error('TIM实例不存在'))
				return
			}

			if (!this.isLoggedIn) {
				console.log('SDK未ready，等待SDK初始化...')
				let waitTime = 0
				const maxWaitTime = 30000 // 最多等待30秒
				const checkInterval = 1000 // 每秒检查一次
				let timeoutHandle = null

				const checkSDKReady = () => {
					if (this.isLoggedIn) {
						console.log('SDK已ready，开始获取群聊列表')
						if (timeoutHandle) clearTimeout(timeoutHandle)
						this.getGroupListInternal().then(resolve).catch(reject)
					} else if (waitTime >= maxWaitTime) {
						console.error('等待SDK就绪超时')
						if (timeoutHandle) clearTimeout(timeoutHandle)
						reject(new Error('SDK初始化超时，请检查网络连接'))
					} else {
						waitTime += checkInterval
						console.log(`等待SDK就绪... (${Math.floor(waitTime / 1000)}/${Math.floor(maxWaitTime / 1000)}秒)`)
						timeoutHandle = setTimeout(checkSDKReady, checkInterval)
					}
				}

				checkSDKReady()
				return
			}

			this.getGroupListInternal().then(resolve).catch(reject)
		})
	}

	// 内部获取群聊列表方法
	getGroupListInternal() {
		return new Promise((resolve, reject) => {
			console.log('开始获取群聊列表')

			// 直接调用，SDK就绪检查已在getGroupList()中完成
			this.tim.getConversationList()
				.then(async (conversationResponse) => {
					console.log('获取会话列表成功')
					
					const groupConversations = conversationResponse.data.conversationList.filter(conversation => {
						return conversation.conversationID && conversation.conversationID.startsWith('GROUP')
					})

					console.log('群聊会话列表数量:', groupConversations.length)

					// 先获取一次群组列表，避免在循环中重复调用
					let allGroups = []
					try {
						const groupListResponse = await this.tim.getGroupList()
						allGroups = groupListResponse.data.groupList || []
					} catch (error) {
						console.error('获取群组列表失败:', error)
					}

					const groupsWithInfo = await Promise.all(
						groupConversations.map(async (conversation) => {
							try {
								const groupName = conversation.groupProfile?.name || ''
								const [doctorId, patientName] = groupName.split('|')
								const groupID = conversation.conversationID.replace('GROUP', '')

								// 从已获取的群组列表中查找
								const group = allGroups.find(g => g.groupID === groupID)
								const groupInfo = {
									groupID: groupID,
									name: group?.name || '问诊群聊',
									avatar: '/static/home/avatar.svg',
									memberCount: group?.memberCount || 0
								}

								const lastMessage = conversation.lastMessage
								let lastMessageText = '暂无消息'
								let lastMessageTime = Date.now()

								if (lastMessage) {
									if (lastMessage.type === 'TIMTextElem') {
										lastMessageText = lastMessage.payload.text
									} else if (lastMessage.type === 'TIMImageElem') {
										lastMessageText = '[图片]'
									} else if (lastMessage.type === 'TIMSoundElem') {
										lastMessageText = '[语音]'
									} else if (lastMessage.type === 'TIMCustomElem') {
										lastMessageText = lastMessage.payload.data || '[自定义消息]'
									} else {
										lastMessageText = '[未知消息类型]'
									}

									lastMessageTime = (lastMessage.lastTime || lastMessage.time || 0) * 1000
								}

								return {
									...groupInfo,
									groupID: groupID,
									doctorId,
									patientName,
									conversationID: conversation.conversationID,
									lastMessage: lastMessageText,
									lastMessageTime: lastMessageTime,
									unreadCount: conversation.unreadCount || 0
								}
							} catch (error) {
								console.error(`处理群聊会话失败:`, error)
								return {
									groupID: conversation.conversationID,
									name: conversation.groupProfile?.name || '问诊群聊',
									doctorId: '',
									patientName: '',
									avatar: '/static/home/avatar.svg',
									lastMessage: '获取失败',
									lastMessageTime: Date.now(),
									unreadCount: conversation.unreadCount || 0,
									memberCount: 0
								}
							}
						})
					)

					console.log('处理后的群聊列表数量:', groupsWithInfo.length)
					resolve({
						success: true,
						groupList: groupsWithInfo,
						totalCount: groupsWithInfo.length,
						data: conversationResponse.data
					})
				})
				.catch((imError) => {
					console.error('获取会话列表失败:', imError)
					reject({
						success: false,
						error: imError
					})
				})
		})
	}

	// 创建问诊群聊
	createGroup({ type, name, groupID, memberList, timeout = 30000, retryCount = 2 }) {
		return new Promise((resolve, reject) => {
			if (!this.tim) {
				reject(new Error('TIM实例不存在'))
				return
			}

			if (!this.isLoggedIn) {
				console.log('SDK未ready，等待SDK初始化...')
				const maxWaitTime = 30000
				const startTime = Date.now()

				const checkSDKReady = () => {
					if (this.isLoggedIn) {
						console.log('SDK已ready，开始创建群聊')
						this.createGroupInternal({ type, name, groupID, memberList, timeout, retryCount })
							.then(resolve)
							.catch(reject)
					} else if (Date.now() - startTime > maxWaitTime) {
						reject(new Error('等待SDK初始化超时'))
					} else {
						console.log('SDK仍未ready，继续等待...')
						setTimeout(checkSDKReady, 1000)
					}
				}
				checkSDKReady()
				return
			}

			this.createGroupInternal({ type, name, groupID, memberList, timeout, retryCount })
				.then(resolve)
				.catch(reject)
		})
	}

	// 内部创建群组方法
	async createGroupInternal({ type, name, groupID, memberList, timeout, retryCount }) {
		let lastError = null

		for (let attempt = 0; attempt <= retryCount; attempt++) {
			try {
				console.log(`创建群聊尝试 ${attempt + 1}/${retryCount + 1}:`, {
					type,
					name,
					groupID,
					memberCount: memberList ? memberList.length : 0
				})

				const result = await this.createGroupWithTimeout({ type, name, groupID, memberList, timeout })
				console.log(`创建群聊成功，尝试次数: ${attempt + 1}`)
				return result
			} catch (error) {
				lastError = error
				console.error(`第 ${attempt + 1} 次创建群聊失败:`, error)

				if (attempt === retryCount) break

				const retryDelay = Math.min(1000 * Math.pow(2, attempt), 5000)
				console.log(`等待 ${retryDelay}ms 后重试...`)
				await new Promise(resolve => setTimeout(resolve, retryDelay))
			}
		}

		throw lastError
	}

	// 带超时的创建群组方法
	createGroupWithTimeout({ type, name, groupID, memberList, timeout = 30000 }) {
		return new Promise((resolve, reject) => {
			const timeoutId = setTimeout(() => {
				reject(new Error(`创建群聊超时 (${timeout}ms)`))
			}, timeout)

			if (!groupID) {
				clearTimeout(timeoutId)
				reject(new Error('群聊ID不能为空'))
				return
			}

			if (!name) {
				clearTimeout(timeoutId)
				reject(new Error('群聊名称不能为空'))
				return
			}

			let groupType = TIM.TYPES.GRP_WORK
			if (type === 'GRP_WORK') {
				groupType = TIM.TYPES.GRP_WORK
			} else if (type === 'GRP_PUBLIC') {
				groupType = TIM.TYPES.GRP_PUBLIC
			} else if (type === 'GRP_CHATROOM') {
				groupType = TIM.TYPES.GRP_CHATROOM
			} else if (type === 'GRP_AVCHATROOM') {
				groupType = TIM.TYPES.GRP_AVCHATROOM
			} else if (type === 'GRP_MEETING') {
				groupType = TIM.TYPES.GRP_MEETING
			}

			const createGroupParams = {
				type: groupType,
				name: name,
				groupID: groupID
			}

			if (memberList && memberList.length > 0) {
				createGroupParams.memberList = memberList
			}

			console.log('创建群组参数:', createGroupParams)

			this.tim.createGroup(createGroupParams).then(async (imResponse) => {
				clearTimeout(timeoutId)
				console.log('创建问诊群聊成功:', imResponse)

				try {
					await api('sendSystemMessage', { groupID, status: 'pending' })
					console.log('pending系统消息发送成功')
				} catch (error) {
					console.error('pending系统消息发送失败:', error)
				}

				resolve({
					success: true,
					groupID: groupID,
					data: imResponse.data
				})
			}).catch((imError) => {
				clearTimeout(timeoutId)

				const enhancedError = {
					...imError,
					originalError: imError,
					groupID: groupID,
					name: name,
					type: type,
					timestamp: new Date().toISOString()
				}

				console.error('创建问诊群聊失败:', enhancedError)

				const errorMessage = enhancedError.message || enhancedError.originalError?.message || ''
				if (errorMessage.includes('group id has been used') || errorMessage.includes('group id has been used!')) {
					console.log('群聊ID已存在，视为创建成功')
					resolve({
						success: true,
						groupID: groupID,
						data: { groupID: groupID },
						message: '群聊已存在'
					})
					return
				}

				reject({
					success: false,
					error: enhancedError,
					userMessage: this.formatErrorMessage(enhancedError)
				})
			})
		})
	}

	// 格式化错误信息
	formatErrorMessage(error) {
		if (!error) return '创建群聊失败，请稍后重试'

		const errorCode = error.code || (error.originalError && error.originalError.code)
		const errorMessage = error.message || (error.originalError && error.originalError.message) || ''

		if (errorMessage.includes('group id has been used') || errorMessage.includes('group id has been used!')) {
			return 'SUCCESS_GROUP_EXISTS'
		}

		switch (errorCode) {
			case 2801:
				return '网络连接超时，请检查网络连接后重试'
			case 2800:
				return '网络连接异常，请检查网络设置'
			case 2802:
				return '服务器连接失败，请稍后重试'
			case 2803:
				return '请求失败，请检查网络连接'
			case 2804:
				return '服务暂时不可用，请稍后重试'
			case 10004:
				return '群聊ID已存在，请使用其他ID'
			case 10007:
				return '群聊创建权限不足'
			case 10010:
				return '群聊数量已达上限'
			default:
				if (errorMessage.includes('超时') || errorMessage.includes('timeout')) {
					return '操作超时，请检查网络连接后重试'
				} else if (errorMessage.includes('网络') || errorMessage.includes('network')) {
					return '网络连接异常，请检查网络设置'
				} else if (errorMessage.includes('权限') || errorMessage.includes('permission')) {
					return '操作权限不足，请联系管理员'
				} else {
					return `创建群聊失败：${errorMessage}`
				}
		}
	}

	// 设置当前会话ID
	setConversationID(conversationID) {
		this.currentConversationID = conversationID
		console.log('设置当前会话ID:', conversationID)
	}

	// 进入会话
	enterConversation(conversationID) {
		console.log("【enterConversation】进入会话:", conversationID)

		// 更新当前会话ID
		this.currentConversationID = conversationID

		// 清空当前消息列表
		this.messageList = []

		// 重置分页状态
		this.nextReqMessageID = ""
		this.isCompleted = false
		this.isLoadingMore = false

		console.log("  会话ID已更新，消息列表已清空，分页状态已重置")

		// 进入群聊会话，默认加载20条消息
		this.enterGroupConversation(conversationID, 20)
	}

	// 进入群聊会话
	async enterGroupConversation(groupID, count = 20) {
		console.log("【enterGroupConversation】进入群聊会话, groupID:", groupID, "count:", count)

		let conversationID = groupID
		let actualGroupID = groupID

		if (groupID.startsWith('GROUP')) {
			actualGroupID = groupID.replace('GROUP', '')
			conversationID = groupID
		} else {
			conversationID = `GROUP${groupID}`
			actualGroupID = groupID
		}

		console.log("  conversationID:", conversationID, "actualGroupID:", actualGroupID)

		// 清空消息列表，准备加载新会话的消息
		this.messageList = []

		// 确保设置当前会话ID，防止消息混淆
		this.currentConversationID = conversationID
		console.log('进入群聊会话，设置currentConversationID:', conversationID)

		this.conversation = {
			conversationID: conversationID,
			conversationType: TIM.TYPES.CONV_GROUP,
			groupProfile: {
				groupID: actualGroupID,
				name: '问诊群聊',
				type: TIM.TYPES.GRP_WORK
			}
		}

		this.markConversationAsRead(conversationID)

		// 首先从本地接口加载聊天记录
		console.log("  开始从本地接口加载聊天记录，groupID:", actualGroupID)
		await this.loadMessagesFromLocalAPI(actualGroupID, count)
	}

	// 从本地API加载聊天记录
	async loadMessagesFromLocalAPI(groupID, count = 20, skip = 0, isPullUp = false) {
		try {
			console.log("【loadMessagesFromLocalAPI】开始从本地API加载聊天记录")
			console.log("  groupID:", groupID, "count:", count, "skip:", skip, "isPullUp:", isPullUp)

			// 调用本地接口获取聊天记录
			const response = await api('getChatRecordsByGroupId', { groupID, count, skip })

			if (response && response.success && response.data && response.data.records) {
				const dbMessages = response.data.records
				const hasMore = response.data.hasMore || false // 从后端获取hasMore字段
				const total = response.data.total || 0

				console.log(`  成功获取 ${dbMessages.length} 条聊天记录`)
				console.log(`  hasMore: ${hasMore}, total: ${total}`)

				// 将数据库消息转换为IM消息格式
				const convertedMessages = dbMessages
					.map(dbMsg => this.convertDBMessageToIMFormat(dbMsg))
					.filter(msg => msg !== null && this.filterMessage(msg))

				console.log(`  转换后 ${convertedMessages.length} 条消息`)

				// 按时间排序（从早到晚）
				convertedMessages.sort((a, b) => a.lastTime - b.lastTime)

				// 根据是否为上拉加载，决定如何更新消息列表
				if (isPullUp) {
					// 上拉加载更多：将新消息插入到列表前面（历史消息）
					this.messageList.unshift(...convertedMessages)
					// 再次排序确保顺序正确
					this.messageList.sort((a, b) => a.lastTime - b.lastTime)
				} else {
					// 首次加载：直接替换消息列表
					this.messageList = convertedMessages
				}

				// 设置分页状态 - 使用后端返回的 hasMore 字段
				this.isCompleted = !hasMore

				console.log(`  分页状态: isCompleted=${this.isCompleted}, hasMore=${hasMore}`)

				// 触发回调
				this.triggerCallback("onMessageListLoaded", {
					messages: this.messageList,
					isPullUp: isPullUp,
					hasMore: hasMore,
					isCompleted: this.isCompleted,
					total: total,
				})

				return {
					success: true,
					count: convertedMessages.length,
					hasMore: hasMore,
					isCompleted: this.isCompleted,
					messages: this.messageList,
					total: total,
				}
			} else {
				console.warn("  ⚠️ 本地API返回数据格式错误")
				return {
					success: false,
					message: "本地API返回数据格式错误",
					count: 0,
				}
			}
		} catch (error) {
			console.error("  ❌ 从本地API加载聊天记录失败:", error)
			return {
				success: false,
				error: error,
				message: "加载聊天记录失败",
				count: 0,
			}
		}
	}

	// 将数据库消息转换为IM消息格式
	convertDBMessageToIMFormat(dbMsg) {
		try {
			if (!dbMsg || !dbMsg.MsgBody || !Array.isArray(dbMsg.MsgBody) || dbMsg.MsgBody.length === 0) {
				return null
			}

			// 获取第一个消息体（通常一个消息只有一个消息体）
			const msgBody = dbMsg.MsgBody[0]
			const msgType = msgBody.MsgType

			// 确定消息的流向（in/out）
			// 根据 From_Account 判断是否为当前用户发送的消息
			const flow = dbMsg.From_Account === this.currentUserID ? 'out' : 'in'

			// 计算时间戳（毫秒）
			let lastTime = Date.now()
			if (dbMsg.MsgTime) {
				// MsgTime 是秒级时间戳
				lastTime = dbMsg.MsgTime * 1000
			} else if (dbMsg.createdAt) {
				lastTime = new Date(dbMsg.createdAt).getTime()
			}

			// 构建基础消息对象
			const message = {
				ID: dbMsg.MsgSeq || dbMsg._id || `db_${Date.now()}_${Math.random().toString(36).substr(2, 9)}`,
				from: dbMsg.From_Account || '',
				flow: flow,
				type: msgType,
				payload: this.convertDBPayloadToIMPayload(msgType, msgBody.MsgContent),
				lastTime: lastTime,
				status: 'success',
				avatar: flow === 'in' ? '/static/home/avatar.svg' : '/static/center/user-avatar.png',
				conversationID: this.currentConversationID,
				MsgSeq: dbMsg.MsgSeq, // 保留 MsgSeq 用于分页
			}

			return message
		} catch (error) {
			console.error("转换数据库消息格式失败:", error, dbMsg)
			return null
		}
	}

	// 将数据库消息体转换为IM payload格式
	convertDBPayloadToIMPayload(msgType, msgContent) {
		try {
			if (!msgContent) {
				return {}
			}

			switch (msgType) {
				case 'TIMTextElem':
					return {
						text: msgContent.Text || ''
					}

				case 'TIMImageElem':
					return {
						imageInfoArray: msgContent.ImageInfoArray || []
					}

				case 'TIMSoundElem':
					return {
						url: msgContent.Url || '',
						second: msgContent.Second || 0,
						downloadFlag: msgContent.Download_Flag || 2
					}

				case 'TIMCustomElem':
					return {
						data: msgContent.Data || '',
						description: msgContent.Desc || '',
						extension: msgContent.Ext || ''
					}

				case 'TIMVideoFileElem':
					return {
						videoUrl: msgContent.VideoUrl || '',
						videoSize: msgContent.VideoSize || 0,
						videoSecond: msgContent.VideoSecond || 0,
						videoFormat: msgContent.VideoFormat || '',
						videoDownloadFlag: msgContent.VideoDownloadFlag || 2,
						thumbUrl: msgContent.ThumbUrl || '',
						thumbSize: msgContent.ThumbSize || 0,
						thumbWidth: msgContent.ThumbWidth || 0,
						thumbHeight: msgContent.ThumbHeight || 0,
						thumbFormat: msgContent.ThumbFormat || '',
						thumbDownloadFlag: msgContent.ThumbDownloadFlag || 2
					}

				case 'TIMFileElem':
					return {
						url: msgContent.Url || '',
						fileSize: msgContent.FileSize || 0,
						fileName: msgContent.FileName || '',
						downloadFlag: msgContent.Download_Flag || 2
					}

				default:
					return msgContent
			}
		} catch (error) {
			console.error("转换消息体失败:", error, msgType, msgContent)
			return {}
		}
	}

	// 分页加载消息（单次加载）
	async loadMessagesPage(options = {}) {
		if (!this.conversation) {
			console.log("会话未初始化，无法加载消息")
			return Promise.reject(new Error("会话未初始化"))
		}

		const count = options.count || 20
		// 记录调用前是否已有nextReqMessageID，用于判断是否为首次加载
		const isLoadMore = !!(this.nextReqMessageID && this.nextReqMessageID !== "")

		try {
			// 构建请求参数
			const requestParams = {
				conversationID: this.conversation.conversationID,
				count: Math.min(count, 15), // 腾讯IM SDK限制count在1-15之间
			}

			// 如果有nextReqMessageID，说明是加载更多
			if (isLoadMore) {
				requestParams.nextReqMessageID = this.nextReqMessageID
				console.log("加载更多消息，nextReqMessageID:", this.nextReqMessageID)
			} else {
				console.log("首次加载消息")
			}

			console.log("  📡 发送请求到腾讯IM:", requestParams)
			const response = await this.tim.getMessageList(requestParams)

			const messageList = response.data.messageList
			const oldNextReqMessageID = this.nextReqMessageID
			const oldIsCompleted = this.isCompleted

			this.nextReqMessageID = response.data.nextReqMessageID
			this.isCompleted = response.data.isCompleted

			console.log("  📥 收到腾讯IM响应:")
			console.log(`    消息数量: ${messageList.length}`)
			console.log(`    nextReqMessageID: ${oldNextReqMessageID} → ${this.nextReqMessageID}`)
			console.log(`    isCompleted: ${oldIsCompleted} → ${this.isCompleted}`)

			if (messageList && messageList.length > 0) {
				// 过滤掉不需要显示的消息
				const filteredMessages = messageList.filter((message) =>
					this.filterMessage(message)
				)

				// 转换消息格式
				const messages = filteredMessages.map((message) => {
					return this.convertMessageFormat(message)
				})

				// 将新消息插入到列表前面（历史消息在前）
				this.messageList.unshift(...messages)

				// 按时间戳排序消息列表（从早到晚）
				this.messageList.sort((a, b) => a.lastTime - b.lastTime)
			}

			// 触发回调 - 使用 isLoadMore 来判断是否为上拉加载
			this.triggerCallback("onMessageListLoaded", {
				messages: this.messageList,
				isPullUp: isLoadMore, // 只有在加载更多时才是 true
				hasMore: !this.isCompleted,
				isCompleted: this.isCompleted,
			})

			return {
				success: true,
				count: messageList ? messageList.length : 0,
				hasMore: !this.isCompleted,
				isCompleted: this.isCompleted,
				messages: this.messageList,
			}
		} catch (error) {
			console.error("分页加载消息失败:", error)
			return {
				success: false,
				error: error,
				count: 0,
			}
		}
	}

	// 加载更多消息（供页面调用）
	async loadMoreMessages() {
		console.log("【loadMoreMessages】开始加载更多消息")
		console.log("  当前状态: isLoadingMore=", this.isLoadingMore)
		console.log("  当前状态: isCompleted=", this.isCompleted)
		console.log("  当前消息数量:", this.messageList.length)

		if (this.isLoadingMore) {
			console.log("  ⚠️ 正在加载中，跳过重复请求")
			return { success: false, message: "正在加载中" }
		}

		if (this.isCompleted) {
			console.log("  ✅ 已加载全部消息")
			return { success: false, message: "已加载全部消息" }
		}

		this.isLoadingMore = true
		console.log("  🔄 设置 isLoadingMore = true")

		try {
			// 从本地数据库加载更多历史消息
			// 使用当前消息列表的长度作为 skip 值
			const skip = this.messageList.length

			// 获取群组ID
			let groupID = ''
			if (this.conversation && this.conversation.groupProfile) {
				groupID = this.conversation.groupProfile.groupID
			} else if (this.currentConversationID) {
				groupID = this.currentConversationID.replace('GROUP', '')
			}

			if (!groupID) {
				console.error("  ❌ 无法获取群组ID")
				this.isLoadingMore = false
				return {
					success: false,
					message: "无法获取群组ID",
				}
			}

			console.log("  从本地数据库加载更多，groupID:", groupID, "skip:", skip)

			// 调用本地API加载更多消息
			const result = await this.loadMessagesFromLocalAPI(groupID, 20, skip, true)

			this.isLoadingMore = false
			console.log("  🔄 设置 isLoadingMore = false")
			console.log("  📥 loadMessagesFromLocalAPI 返回结果:", result)

			if (result.success) {
				console.log("  ✅ 加载成功，新增", result.count, "条消息")
				return {
					success: true,
					count: result.count,
					hasMore: result.hasMore,
					isCompleted: result.isCompleted,
				}
			} else {
				console.log("  ❌ 加载失败:", result.message || result.error)
				return {
					success: false,
					error: result.error,
					message: result.message || "加载失败",
				}
			}
		} catch (error) {
			console.error("  ❌ 加载更多异常:", error)
			this.isLoadingMore = false
			return {
				success: false,
				error: error,
				message: "加载失败",
			}
		}
	}

	// 后台刷新服务器消息（已弃用缓存功能）
	async refreshMessagesFromServer(conversationID, cachedMessages) {
		try {
			const result = await this.getMessages({ getAllMessages: true })
			if (result.success) {
				// 严格过滤：只保留属于当前会话的消息
				const filteredMessages = result.messages.filter(msg => msg.conversationID === conversationID)

				this.messageList = filteredMessages

				console.log(`消息刷新完成，过滤后${filteredMessages.length}条消息`)

				// 触发更新回调
				this.triggerCallback('onMessageListLoaded', {
					messages: this.messageList,
					isPullUp: false,
					hasMore: false,
					isCompleted: true,
					isRefresh: true  // 标记这是刷新操作
				})
			}
		} catch (error) {
			console.error('后台刷新消息失败:', error)
		}
	}

	// 合并消息（保留本地消息，避免覆盖）
	mergeMessages(serverMessages, cachedMessages) {
		const messageMap = new Map()

		// 先添加服务器消息
		serverMessages.forEach(msg => {
			if (msg.ID) {
				messageMap.set(msg.ID, msg)
			}
		})

		// 再添加缓存消息（覆盖服务器消息，保留本地最新状态）
		cachedMessages.forEach(msg => {
			if (msg.ID) {
				// 如果是本地消息（ID以local_开头）或者是发送中/失败的消息，保留缓存中的版本
				if (msg.ID.startsWith('local_') || msg.status === 'sending' || msg.status === 'failed') {
					messageMap.set(msg.ID, msg)
				} else if (!messageMap.has(msg.ID)) {
					// 服务器没有的消息也保留
					messageMap.set(msg.ID, msg)
				}
			}
		})

		// 转换为数组并按时间排序
		const mergedArray = Array.from(messageMap.values())
		mergedArray.sort((a, b) => a.lastTime - b.lastTime)

		console.log(`消息合并完成: 服务器${serverMessages.length}条, 缓存${cachedMessages.length}条, 合并后${mergedArray.length}条`)

		return mergedArray
	}

	// 获取消息列表
	async getMessages(options = {}) {
		if (!this.conversation) {
			console.log('会话未初始化，跳过获取消息列表')
			this.isLoading = false
			return Promise.resolve({ success: false, error: '会话未初始化' })
		}

		this.isLoading = true

		const defaultOptions = {
			count: 20,
			nextReqMessageID: '',
			isPullUp: false,
			getAllMessages: false
		}

		const requestOptions = { ...defaultOptions, ...options }

		try {
			if (requestOptions.getAllMessages) {
				return await this.getAllMessages(requestOptions)
			} else {
				return await this.getMessagesBatch(requestOptions)
			}
		} catch (error) {
			console.error('获取消息列表失败:', error)
			this.isLoading = false
			this.messageList = []

			this.triggerCallback('onMessageListLoaded', {
				messages: this.messageList,
				isPullUp: requestOptions.isPullUp,
				hasMore: false,
				error: error
			})

			return { success: false, error }
		}
	}

	// 获取单批消息
	async getMessagesBatch(options) {
		const requestParams = {
			conversationID: this.conversation.conversationID,
			count: options.count
		}

		if (options.nextReqMessageID) {
			requestParams.nextReqMessageID = options.nextReqMessageID
		}

		console.log('请求消息列表参数:', requestParams)

		const response = await this.tim.getMessageList(requestParams)
		const messageList = response.data.messageList
		const nextReqMessageID = response.data.nextReqMessageID
		const isCompleted = response.data.isCompleted

		console.log(`TIM返回消息: ${messageList.length}条, isCompleted: ${isCompleted}`)

		// 处理消息
		const messages = this.processMessages(messageList)

		console.log(`处理后消息: ${messages.length}条`)

		// 更新消息列表
		if (options.isPullUp) {
			this.messageList.unshift(...messages)
		} else {
			this.messageList = messages
		}

		// 缓存消息
		this.cacheMessages()

		this.isLoading = false

		// 触发回调（仅在非getAllMessages调用时触发）
		if (!options.skipCallback) {
			this.triggerCallback('onMessageListLoaded', {
				messages: this.messageList,
				isPullUp: options.isPullUp,
				hasMore: !isCompleted,
				nextReqMessageID: nextReqMessageID,
				isCompleted: isCompleted
			})
		}

		// 返回当前批次的消息，而不是整个messageList
		return {
			success: true,
			messages: messages,  // 返回处理后的当前批次消息
			hasMore: !isCompleted,
			nextReqMessageID: nextReqMessageID,
			isCompleted: isCompleted
		}
	}

	// 获取全部历史消息
	async getAllMessages(options) {
		console.log('开始获取全部历史消息...')
		let allMessages = []
		let nextReqMessageID = options.nextReqMessageID || ''
		let isCompleted = false
		let requestCount = 0
		const maxRequests = 50  // 最多请求50次，避免无限循环

		while (!isCompleted && requestCount < maxRequests) {
			requestCount++
			console.log(`获取历史消息第${requestCount}批...`)

			const batchOptions = {
				...options,
				nextReqMessageID: nextReqMessageID,
				isPullUp: false,  // 改为false，因为我们是在构建完整列表
				skipCallback: true  // 跳过单批回调，最后统一回调
			}

			const result = await this.getMessagesBatch(batchOptions)

			if (!result.success) {
				console.error(`第${requestCount}批消息获取失败:`, result.error)
				throw new Error(result.error)
			}

			console.log(`第${requestCount}批获取到${result.messages.length}条消息`)

			// 将当前批次的消息添加到开头（历史消息在前）
			if (result.messages.length > 0) {
				// 使用Set去重，避免重复消息
				const existingIds = new Set(allMessages.map(m => m.ID))
				const newMessages = result.messages.filter(m => !existingIds.has(m.ID))

				if (newMessages.length > 0) {
					allMessages.unshift(...newMessages)
					console.log(`添加${newMessages.length}条新消息，当前总数: ${allMessages.length}`)
				}
			}

			nextReqMessageID = result.nextReqMessageID
			isCompleted = result.isCompleted

			console.log(`isCompleted: ${isCompleted}, nextReqMessageID: ${nextReqMessageID}`)

			// 如果没有更多消息ID，说明已经获取完毕
			if (!nextReqMessageID) {
				console.log('没有更多消息ID，获取完成')
				break
			}
		}

		if (requestCount >= maxRequests) {
			console.warn(`达到最大请求次数限制(${maxRequests})，停止获取`)
		}

		// 更新消息列表
		this.messageList = allMessages
		this.cacheMessages()
		this.isLoading = false

		console.log(`全部历史消息获取完成，共${allMessages.length}条消息，请求了${requestCount}批`)

		// 触发回调
		this.triggerCallback('onMessageListLoaded', {
			messages: this.messageList,
			isPullUp: false,
			hasMore: false,
			nextReqMessageID: '',
			isCompleted: true
		})

		return {
			success: true,
			messages: this.messageList,
			hasMore: false,
			nextReqMessageID: '',
			isCompleted: true
		}
	}

	// 处理消息 - 统一过滤和转换
	processMessages(messageList) {
		const filteredMessages = messageList.filter(message => this.filterMessage(message))
		return filteredMessages.map(message => this.convertMessageFormat(message))
	}

	// 缓存消息 - 统一缓存逻辑
	cacheMessages() {
		// 缓存功能已移除
	}

	// 清理指定会话的缓存（已弃用）
	clearConversationCache(conversationID) {
		// 缓存功能已移除
	}

	// 清理所有缓存（已弃用）
	clearAllCache() {
		// 缓存功能已移除
	}

	// 获取消息列表（兼容旧方法）
	getMessageList(options = {}) {
		return this.getMessages(options)
	}

	// 发送文本消息
	async sendTextMessage(text, cloudCustomData = '') {
		if (!text.trim()) return

		if (!this.tim) {
			this.triggerCallback('onError', 'IM未初始化')
			return { success: false, error: 'IM未初始化' }
		}

		// 检查登录状态
		if (!this.isLoggedIn) {
			console.error('IM未登录，无法发送消息');
			this.triggerCallback('onError', 'IM未登录，请稍后重试')
			return { success: false, error: 'IM未登录' }
		}

		// 优先使用 currentConversationID，如果没有则尝试从 conversation 获取
		let conversationID = this.currentConversationID;
		if (!conversationID && this.conversation) {
			conversationID = this.conversation.conversationID;
		}

		if (!conversationID) {
			console.error('会话ID不存在');
			this.triggerCallback('onError', '会话不存在，请重新进入聊天')
			return { success: false, error: '会话ID不存在' }
		}

		// 从 conversationID 提取 groupID
		let groupID = null;
		if (conversationID.startsWith('GROUP')) {
			groupID = conversationID.replace('GROUP', '');
		} else if (this.conversation?.groupProfile?.groupID) {
			groupID = this.conversation.groupProfile.groupID;
		}

		if (!groupID) {
			console.error('无法获取群聊ID，conversationID:', conversationID);
			this.triggerCallback('onError', '无法获取群聊ID')
			return { success: false, error: '无法获取群聊ID' }
		}

		const localMessage = {
			ID: `local_${Date.now()}_${Math.random().toString(36).substr(2, 9)}`,
			flow: 'out',
			type: 'TIMTextElem',
			payload: { text: text },
			lastTime: Date.now(),
			status: 'sending',
			avatar: '/static/center/user-avatar.png',
			conversationID: conversationID,
			from: this.currentUserID
		}

		// 缓存功能已移除

		this.triggerCallback('onMessageReceived', localMessage)

		const message = this.tim.createTextMessage({
			to: groupID,
			conversationType: TIM.TYPES.CONV_GROUP,
			cloudCustomData,
			payload: { text: text }
		})

		try {
			await this.tim.sendMessage(message)
			localMessage.status = 'success'
			return { success: true, message: localMessage }
		} catch (error) {
			console.error('文本消息发送失败:', error)
			localMessage.status = 'failed'
			
			// 如果是因为未登录导致的失败，尝试重连
			if (error.message && (error.message.includes('not login') || error.message.includes('sdk not ready'))) {
				console.log('检测到未登录错误，尝试重连...');
				this.isLoggedIn = false;
				this.ensureIMConnection();
			}
			
			return { success: false, error }
		}
	}

	// 发送图片消息
	async sendImageMessage(imageFile) {
		console.log('sendImageMessage 被调用，参数:', imageFile);
		
		if (!this.tim) {
			this.triggerCallback('onError', 'IM未初始化')
			return { success: false, error: 'IM未初始化' }
		}

		// 检查登录状态
		if (!this.isLoggedIn) {
			console.error('IM未登录，无法发送消息');
			this.triggerCallback('onError', 'IM未登录，请稍后重试')
			return { success: false, error: 'IM未登录' }
		}

		// 优先使用 currentConversationID，如果没有则尝试从 conversation 获取
		let conversationID = this.currentConversationID;
		if (!conversationID && this.conversation) {
			conversationID = this.conversation.conversationID;
		}

		if (!conversationID) {
			console.error('会话ID不存在');
			this.triggerCallback('onError', '会话不存在，请重新进入聊天')
			return { success: false, error: '会话ID不存在' }
		}

		// 从 conversationID 提取 groupID
		let groupID = null;
		if (conversationID.startsWith('GROUP')) {
			groupID = conversationID.replace('GROUP', '');
		} else if (this.conversation?.groupProfile?.groupID) {
			groupID = this.conversation.groupProfile.groupID;
		}

		if (!groupID) {
			console.error('无法获取群聊ID，conversationID:', conversationID);
			this.triggerCallback('onError', '无法获取群聊ID')
			return { success: false, error: '无法获取群聊ID' }
		}

		console.log('发送图片消息，conversationID:', conversationID, 'groupID:', groupID);

		// imageFile 现在是完整的 wx.chooseImage 返回对象
		console.log('接收到的图片选择结果:', imageFile);
		console.log('类型:', typeof imageFile);
		console.log('keys:', imageFile ? Object.keys(imageFile) : 'null');

		// 验证对象
		if (!imageFile) {
			console.error('图片选择结果为空');
			this.triggerCallback('onError', '图片文件无效');
			return { success: false, error: '图片选择结果为空' };
		}

		// 获取文件路径用于显示预览
		let previewPath = '';
		if (imageFile.tempFilePaths && imageFile.tempFilePaths.length > 0) {
			previewPath = imageFile.tempFilePaths[0];
		} else if (imageFile.tempFiles && imageFile.tempFiles.length > 0) {
			previewPath = imageFile.tempFiles[0].tempFilePath || imageFile.tempFiles[0].path;
		}

		console.log('预览路径:', previewPath);

		// 获取图片尺寸信息（用于本地预览）
		const imageInfo = await this.getImageInfo(previewPath);

		const localMessage = {
			ID: `local_${Date.now()}_${Math.random().toString(36).substr(2, 9)}`,
			flow: 'out',
			type: 'TIMImageElem',
			payload: {
				imageInfoArray: [{
					url: previewPath,
					width: imageInfo.width,
					height: imageInfo.height
				}]
			},
			lastTime: Date.now(),
			status: 'sending',
			avatar: '/static/center/user-avatar.png',
			conversationID: conversationID,
			from: this.currentUserID
		}

		console.log('创建本地图片消息:', localMessage)

		// 缓存功能已移除

		// 触发消息接收回调，让UI立即显示
		this.triggerCallback('onMessageReceived', localMessage)

		console.log('准备创建 TIM 图片消息，groupID:', groupID, 'imageFile:', imageFile);
		
		try {
			// 创建图片消息 - 直接传递 wx.chooseImage 的完整返回对象
			const message = this.tim.createImageMessage({
				to: groupID,
				conversationType: TIM.TYPES.CONV_GROUP,
				payload: { 
					file: imageFile  // 传递完整的 wx.chooseImage 返回对象
				}
			})

			console.log('TIM 图片消息已创建:', message);

			console.log('开始发送图片消息...');
			const sendResult = await this.tim.sendMessage(message);
			console.log('图片消息发送成功:', sendResult);
			localMessage.status = 'success'
			return { success: true, message: localMessage }
		} catch (error) {
			console.error('图片消息发送失败:', error)
			console.error('错误详情:', {
				message: error.message,
				stack: error.stack,
				imageFile: imageFile
			});
			localMessage.status = 'failed'
			
			// 如果是因为未登录导致的失败，尝试重连
			if (error.message && (error.message.includes('not login') || error.message.includes('sdk not ready'))) {
				console.log('检测到未登录错误，尝试重连...');
				this.isLoggedIn = false;
				this.ensureIMConnection();
			}
			
			return { success: false, error }
		}
	}

	// 发送语音消息
	async sendVoiceMessage(voiceFile, duration) {
		if (!this.tim) {
			this.triggerCallback('onError', 'IM未初始化')
			return { success: false, error: 'IM未初始化' }
		}

		// 检查登录状态
		if (!this.isLoggedIn) {
			console.error('IM未登录，无法发送消息');
			this.triggerCallback('onError', 'IM未登录，请稍后重试')
			return { success: false, error: 'IM未登录' }
		}

		// 优先使用 currentConversationID，如果没有则尝试从 conversation 获取
		let conversationID = this.currentConversationID;
		if (!conversationID && this.conversation) {
			conversationID = this.conversation.conversationID;
		}

		if (!conversationID) {
			console.error('会话ID不存在');
			this.triggerCallback('onError', '会话不存在，请重新进入聊天')
			return { success: false, error: '会话ID不存在' }
		}

		// 从 conversationID 提取 groupID
		let groupID = null;
		if (conversationID.startsWith('GROUP')) {
			groupID = conversationID.replace('GROUP', '');
		} else if (this.conversation?.groupProfile?.groupID) {
			groupID = this.conversation.groupProfile.groupID;
		}

		if (!groupID) {
			console.error('无法获取群聊ID，conversationID:', conversationID);
			this.triggerCallback('onError', '无法获取群聊ID')
			return { success: false, error: '无法获取群聊ID' }
		}

		const localMessage = {
			ID: `local_${Date.now()}_${Math.random().toString(36).substr(2, 9)}`,
			flow: 'out',
			type: 'TIMSoundElem',
			payload: {
				url: this.getVoiceUrl(voiceFile),
				second: duration
			},
			lastTime: Date.now(),
			status: 'sending',
			avatar: '/static/center/user-avatar.png',
			conversationID: conversationID,
			from: this.currentUserID
		}

		// 缓存功能已移除

		this.triggerCallback('onMessageReceived', localMessage)

		const message = this.tim.createAudioMessage({
			to: groupID,
			conversationType: TIM.TYPES.CONV_GROUP,
			payload: { file: voiceFile }
		})

		try {
			await this.tim.sendMessage(message)
			localMessage.status = 'success'
			return { success: true, message: localMessage }
		} catch (error) {
			console.error('语音消息发送失败:', error)
			localMessage.status = 'failed'
			
			// 如果是因为未登录导致的失败，尝试重连
			if (error.message && (error.message.includes('not login') || error.message.includes('sdk not ready'))) {
				console.log('检测到未登录错误，尝试重连...');
				this.isLoggedIn = false;
				this.ensureIMConnection();
			}
			
			return { success: false, error }
		}
	}

	// 发送自定义消息
	async sendCustomMessage(messageData) {
		if (!this.tim) {
			this.triggerCallback('onError', 'IM未初始化')
			return { success: false, error: 'IM未初始化' }
		}

		// 检查登录状态
		if (!this.isLoggedIn) {
			console.error('IM未登录，无法发送消息');
			this.triggerCallback('onError', 'IM未登录，请稍后重试')
			return { success: false, error: 'IM未登录' }
		}

		// 优先使用 currentConversationID，如果没有则尝试从 conversation 获取
		let conversationID = this.currentConversationID;
		if (!conversationID && this.conversation) {
			conversationID = this.conversation.conversationID;
		}

		if (!conversationID) {
			console.error('会话ID不存在');
			this.triggerCallback('onError', '会话不存在，请重新进入聊天')
			return { success: false, error: '会话ID不存在' }
		}

		// 从 conversationID 提取 groupID
		let groupID = null;
		if (conversationID.startsWith('GROUP')) {
			groupID = conversationID.replace('GROUP', '');
		} else if (this.conversation?.groupProfile?.groupID) {
			groupID = this.conversation.groupProfile.groupID;
		}

		if (!groupID) {
			console.error('无法获取群聊ID，conversationID:', conversationID);
			this.triggerCallback('onError', '无法获取群聊ID')
			return { success: false, error: '无法获取群聊ID' }
		}

		const localMessage = {
			ID: `local_${Date.now()}_${Math.random().toString(36).substr(2, 9)}`,
			flow: 'out',
			type: 'TIMCustomElem',
			payload: {
				data: JSON.stringify(messageData),
				description: messageData.content || '自定义消息',
				extension: messageData.messageType || 'custom'
			},
			lastTime: Date.now(),
			status: 'sending',
			avatar: '/static/center/user-avatar.png',
			conversationID: conversationID,
			from: this.currentUserID
		}

		// 缓存功能已移除

		this.triggerCallback('onMessageReceived', localMessage)

		const message = this.tim.createCustomMessage({
			to: groupID,
			conversationType: TIM.TYPES.CONV_GROUP,
			payload: {
				data: JSON.stringify(messageData),
				description: messageData.content || '自定义消息',
				extension: messageData.messageType || 'custom'
			}
		})

		try {
			await this.tim.sendMessage(message)
			localMessage.status = 'success'
			return { success: true, message: localMessage }
		} catch (error) {
			console.error('自定义消息发送失败:', error)
			localMessage.status = 'failed'
			
			// 如果是因为未登录导致的失败，尝试重连
			if (error.message && (error.message.includes('not login') || error.message.includes('sdk not ready'))) {
				console.log('检测到未登录错误，尝试重连...');
				this.isLoggedIn = false;
				this.ensureIMConnection();
			}
			
			return { success: false, error }
		}
	}

	// 工具方法
	filterMessage(message) {
		if (message.type === 'TIMCustomElem' && message.payload && message.payload.data) {
			if (message.payload.data === 'group_create' || message.payload.data === 'purchased') {
				console.log('过滤消息:', message.ID, message.payload.data)
				return false
			}
		}
		return true
	}

	convertMessageFormat(timMessage) {
		let lastTime
		if (timMessage.lastTime) {
			lastTime = timMessage.lastTime * 1000
		} else if (timMessage.time) {
			lastTime = timMessage.time * 1000
		} else if (timMessage.timestamp) {
			lastTime = timMessage.timestamp * 1000
		} else {
			lastTime = Date.now()
		}
		const message = {
			ID: timMessage.ID,
			from: timMessage.from,
			flow: timMessage.flow,
			type: timMessage.type,
			payload: timMessage.payload,
			lastTime: lastTime,
			status: timMessage.status || 'success',
			avatar: timMessage.flow === 'in' ? '/static/home/avatar.svg' : '/static/center/user-avatar.png',
			// 优先使用消息本身的conversationID，确保消息归属正确的会话
			conversationID: timMessage.conversationID
		}

		return message
	}

	formatLastMessage(message) {
		try {
			switch (message.type) {
				case 'TIMTextElem':
					return message.payload.text || '[文本消息]'
				case 'TIMImageElem':
					return '[图片]'
				case 'TIMSoundElem':
					return '[语音]'
				case 'TIMCustomElem':
					try {
						const customData = JSON.parse(message.payload.data)
						if (customData.messageType === 'symptom') {
							return '[病情描述]'
						} else if (customData.messageType === 'prescription') {
							return '[处方单]'
						} else if (customData.messageType === 'refill') {
							return '[续方申请]'
						} else if (customData.messageType === 'survey') {
							return '[问卷调查]'
						} else {
							return customData.content || '[自定义消息]'
						}
					} catch (error) {
						return '[自定义消息]'
					}
				default:
					return '[未知消息类型]'
			}
		} catch (error) {
			console.error('格式化最后一条消息失败:', error)
			return '[消息]'
		}
	}

	getImageUrl(imageFile) {
		// 支持 tempFilePath 或 path
		if (imageFile?.tempFilePath) {
			return imageFile.tempFilePath;
		}
		if (imageFile?.path) {
			return imageFile.path;
		}
		// 处理字符串路径
		if (typeof imageFile === 'string') {
			return imageFile;
		}
		console.warn('无法获取图片URL，使用默认图片:', imageFile);
		return '/static/home/photo.png';
	}

	// 获取图片尺寸信息
	getImageInfo(imagePath) {
		return new Promise((resolve) => {
			// 如果传入的是对象，尝试提取路径
			if (typeof imagePath === 'object') {
				if (imagePath?.tempFilePath) {
					imagePath = imagePath.tempFilePath;
				} else if (imagePath?.path) {
					imagePath = imagePath.path;
				} else {
					console.warn('无法从对象中获取图片路径，使用默认尺寸:', imagePath);
					resolve({ width: 400, height: 300 });
					return;
				}
			}

			// 如果不是字符串，使用默认尺寸
			if (typeof imagePath !== 'string' || !imagePath) {
				console.warn('图片路径无效，使用默认尺寸:', imagePath);
				resolve({ width: 400, height: 300 });
				return;
			}

			console.log('获取图片信息，路径:', imagePath);

			// 使用uni.getImageInfo获取图片尺寸
			uni.getImageInfo({
				src: imagePath,
				success: (res) => {
					console.log('获取图片尺寸成功:', res);
					resolve({
						width: res.width,
						height: res.height
					});
				},
				fail: (err) => {
					console.error('获取图片尺寸失败:', err);
					// 失败时使用默认尺寸
					resolve({ width: 400, height: 300 });
				}
			});
		});
	}

	getVoiceUrl(voiceFile) {
		if (typeof voiceFile === 'string') {
			return voiceFile
		}
		if (voiceFile && voiceFile.tempFilePath) {
			return voiceFile.tempFilePath
		}
		if (voiceFile && voiceFile.filePath) {
			return voiceFile.filePath
		}
		return '/static/voice/default.mp3'
	}

	// 标记会话为已读
	markConversationAsRead(conversationID) {
		if (!this.tim || !this.isLoggedIn) return

		try {
			let formattedConversationID = conversationID
			if (!conversationID.startsWith('GROUP')) {
				formattedConversationID = `GROUP${conversationID}`
			}

			this.tim.setMessageRead({
				conversationID: formattedConversationID
			}).then(() => {
				this.triggerCallback('onConversationListUpdated', {
					conversationID: formattedConversationID,
					unreadCount: 0
				})
			}).catch(error => {
				console.error('标记会话已读失败:', error)
			})
		} catch (error) {
			console.error('标记会话已读异常:', error)
		}
	}

	// 更新会话列表
	updateConversationListOnNewMessage(message) {
		try {
			const conversationID = message.conversationID || this.currentConversationID
			if (!conversationID) return

			const conversationUpdate = {
				conversationID: conversationID,
				lastMessage: this.formatLastMessage(message),
				lastMessageTime: message.lastTime,
				unreadCount: 1,
				messageType: message.type,
				messageFlow: message.flow
			}

			this.triggerCallback('onConversationListUpdated', {
				reason: 'NEW_MESSAGE_RECEIVED',
				conversation: conversationUpdate,
				message: message
			})
		} catch (error) {
			console.error('更新会话列表失败:', error)
		}
	}

	// 设置回调函数
	setCallback(event, callback) {
		this.callbacks[event] = callback
	}

	// 触发回调
	triggerCallback(event, data) {
		if (this.callbacks[event]) {
			this.callbacks[event](data)
		}
	}

	// 清理资源（优化版：更完整的清理）
	destroy() {
		console.log('=== 开始清理IM资源 ===')

		// 清理所有定时器（使用统一方法）
		this.clearAllTimers()

		// 清理消息缓存（已弃用）
		console.log('缓存功能已移除')

		// 清理TIM实例
		if (this.tim) {
			try {
				// 移除事件监听器
				this.removeEventListeners()

				// 退出登录（同步处理，不等待结果）
				if (typeof this.tim.logout === 'function') {
					this.tim.logout()
						.then(() => console.log('✓ TIM登出成功'))
						.catch(error => console.warn('TIM登出失败:', error))
				}
			} catch (error) {
				console.error('清理TIM时出错:', error)
			}
		}

		// 重置所有状态（使用统一方法）
		this.resetAllStates()

		// 清理其他状态
		this.messageList = []
		this.conversation = null
		this.currentUserID = ''
		this.currentUserSig = ''
		this.currentConversationID = null
		this.tim = null

		console.log('=== IM资源清理完成 ===')
	}
}

// 创建全局IM管理器实例
const globalTimChatManager = new TimChatManager()

// 全局IM初始化函数 - 支持强制重新初始化
let initPromise = null;
const initGlobalTIM = async (userID, forceReinit = false) => {
	console.log('开始初始化全局IM，userID:', userID, 'forceReinit:', forceReinit)

	if (globalTimChatManager.isInitializing) {
		console.log('全局IM正在初始化中，跳过重复初始化')
		return true
	}

	if (forceReinit && globalTimChatManager.tim) {
		console.log('强制重新初始化，清理现有IM状态')
		globalTimChatManager.isLoggedIn = false
		globalTimChatManager.lastLoginTime = 0
		globalTimChatManager.reconnectAttempts = 0

		if (globalTimChatManager.tim.isLoggedIn) {
			await globalTimChatManager.tim.logout()
			console.log('强制重新初始化：TIM登出成功')
		}

		await globalTimChatManager.initTIM(userID)
		console.log('强制重新初始化完成')
		return true
	}

	if (!forceReinit && globalTimChatManager.tim && globalTimChatManager.isLoggedIn) {
		console.log('全局IM已经初始化并登录，跳过重复初始化')
		return true
	}

	await globalTimChatManager.initTIM(userID)
	console.log('全局IM初始化成功')
	return true
}
const getInitIMPromise = async (userID, forceReinit) => {
	if (initPromise) return initPromise;
	initPromise = initGlobalTIM(userID, forceReinit);
	return initPromise;
}
const clearInitIMPromise = () => {
	initPromise = null;
}

// 获取群聊列表（全局函数）
const getGroupList = async () => {
	return await globalTimChatManager.getGroupList()
}

// 进入群聊
const enterChatGroupRoom = async (chatGroup, navigateType = 'navigateTo', viewType) => {
	const groupListResult = await globalTimChatManager.getGroupList();
	const groupList = groupListResult && Array.isArray(groupListResult.groupList) ? groupListResult.groupList : [];
	let group = groupList.find(g => g.groupID === chatGroup.groupID);

	const navigateFn = ['navigateTo', 'redirectTo', 'reLaunch'].includes(navigateType) ? navigateType : 'navigateTo'
	uni[navigateFn]({
		url: `/pages-im/IM/index?conversationID=GROUP${chatGroup.groupID}&groupID=${chatGroup.groupID}&conversationType=GROUP&viewType=${viewType}`,
	})
}

// 检查全局IM状态
const checkGlobalIMStatus = () => {
	return globalTimChatManager.isLoggedIn
}

// 清理指定会话的缓存
const clearConversationCache = (conversationID) => {
	return globalTimChatManager.clearConversationCache(conversationID)
}

// 清理所有消息缓存
const clearAllMessageCache = () => {
	return globalTimChatManager.clearAllCache()
}

// 确保全局IM连接
const ensureGlobalIMConnection = async () => {
	return await globalTimChatManager.ensureIMConnection()
}

// 获取全局IM登录状态
const getGlobalIMLoginStatus = () => {
	return globalTimChatManager.isLoggedIn
}

// 设置全局IM回调
const setGlobalIMCallback = (event, callback) => {
	globalTimChatManager.setCallback(event, callback)
}

// 导出
export {
	TimChatManager,
	globalTimChatManager,
	initGlobalTIM,
	getInitIMPromise,
	clearInitIMPromise,
	enterChatGroupRoom,
	checkGlobalIMStatus,
	ensureGlobalIMConnection,
	getGlobalIMLoginStatus,
	setGlobalIMCallback,
	getGroupList,
	clearConversationCache,
	clearAllMessageCache
}

export default globalTimChatManager