// app.js
const api = require('./utils/api');

App({
  globalData: {
    userInfo: null,
    currentTab: 'index',
    sessionStartTime: null,
    // 缓存相关
    cachedData: {
      userInfo: null,
      personnelInfo: null
    },
    cacheExpireTime: {
      userInfo: 0, // 时间戳，0表示无缓存
      personnelInfo: 0 // 时间戳，0表示无缓存
    }
  },
  
  // 事件总线，用于页面间通信
  eventBus: {
    on(event, callback) {
      if (!this.handlers) this.handlers = {};
      if (!this.handlers[event]) this.handlers[event] = [];
      this.handlers[event].push(callback);
    },
    off(event, callback) {
      if (!this.handlers || !this.handlers[event]) return;
      this.handlers[event] = this.handlers[event].filter(handler => handler !== callback);
    },
    emit(event, data) {
      if (!this.handlers || !this.handlers[event]) return;
      this.handlers[event].forEach(handler => {
        try {
          handler(data);
        } catch (error) {
          console.error('事件处理函数执行错误:', error);
        }
      });
    }
  },
  
  // 更新当前选中的tab
  updateCurrentTab(tabName) {
    this.globalData.currentTab = tabName;
  },
  
  // 缓存管理方法
  setCache(key, data, expireTime = 3600000) { // 默认缓存1小时
    this.globalData.cachedData[key] = data;
    this.globalData.cacheExpireTime[key] = Date.now() + expireTime;
  },
  
  getCache(key) {
    const now = Date.now();
    if (this.globalData.cacheExpireTime[key] > now) {
      return this.globalData.cachedData[key];
    }
    // 缓存过期，清除缓存
    this.globalData.cachedData[key] = null;
    this.globalData.cacheExpireTime[key] = 0;
    return null;
  },
  
  // 获取业务员信息（带缓存）
  getPersonnelInfo(phoneNumber) {
    return new Promise((resolve, reject) => {
      // 检查缓存
      const cachedData = this.getCache('personnelInfo');
      if (cachedData) {
        console.log('使用缓存的业务员信息');
        resolve(cachedData);
        return;
      }
      
      // 从服务器获取
      api.request('/api/personnel/get', 'POST', { phone: phoneNumber })
        .then(res => {
          console.log('从服务器获取业务员信息成功:', res);
          // 设置缓存，缓存1小时
          this.setCache('personnelInfo', res, 3600000);
          resolve(res);
        })
        .catch(err => {
          console.error('获取业务员信息失败:', err);
          reject(err);
        });
    });
  },
  
  // 记录用户踪迹
  recordUserTrace(action, additionalData = {}) {
    const traceData = {
      action: action,
      timestamp: new Date().toISOString(),
      ...additionalData
    };
    api.addUserTrace(traceData);
  },
  
  onLaunch() {
    console.log('App launched');
    // 记录用户进入小程序
    this.recordUserTrace('app_launch');
    this.globalData.sessionStartTime = new Date().toISOString();
  },
  
  onShow() {
    console.log('App shown');
    // 记录用户显示小程序
    this.recordUserTrace('app_show');
    if (!this.globalData.sessionStartTime) {
      this.globalData.sessionStartTime = new Date().toISOString();
    }
  },
  
  onHide() {
    console.log('App hidden');
    // 记录用户隐藏小程序，包含会话时长
    const sessionEndTime = new Date().toISOString();
    this.recordUserTrace('app_hide', {
      sessionStartTime: this.globalData.sessionStartTime,
      sessionEndTime: sessionEndTime,
      sessionDuration: new Date(sessionEndTime) - new Date(this.globalData.sessionStartTime)
    });
    this.globalData.sessionStartTime = null;
  }
});