// pages/mall/shops/index.js
const request = require('../../../utils/request'); //导入模块
const util = require('../../../utils/util');
const event = require('../../../utils/event.js')
const app = getApp()

Page({

  /**
   * 页面的初始数据
   */
  data: {
    firstShow: false,
    height: app.globalData.fragmentHeight - 180,
    CustomBar: app.globalData.CustomBar,
    scroll: true,
    top: 0,
    pageIndex: 0,
    pageList: [],
    tabs: [],
    loading: true,
    finished: false,
    requesting: false,
    cheapList: [],
    taskList: [],
    form: {
      productTypeId: '',
      pageSize: 10,
      pageNum: 1
    },
    token: null
  },

  /**
   * 生命周期函数--监听页面加载
   */
  onLoad: function (options) {
    this.checkLogin()
    this.setData({
      height: app.globalData.fragmentHeight - 200,
      CustomBar: app.globalData.CustomBar,
      token: app.globalData.token
    })
    event.on('EventMessage', this, this.onEvent)
  },
  // 事件通知
  onEvent: function (message) {
    console.log('shops>>index>>onEvent', message)
    if(message.what == 1 && util.isEmpty(this.data.token)){
      this.setData({ token: app.globalData.token })
    }
    this.fetchTabList()
    this.fetchCheapList()
    // this.fetchTaskList()
  },
  onReady: function(){
    wx.getSystemInfo({
      success: e => {
        app.globalData.StatusBar = e.statusBarHeight;
        let custom = wx.getMenuButtonBoundingClientRect();
        app.globalData.Custom = custom;
        app.globalData.CustomBar = custom.bottom + custom.top - e.statusBarHeight;
        let windowHeight = e.windowHeight * (750 / e.windowWidth);
        let statusBarHeight = app.globalData.CustomBar * (750 / e.windowWidth);
        app.globalData.fragmentHeight = windowHeight - statusBarHeight
        this.setData({
          height: app.globalData.fragmentHeight - 200,
          CustomBar: app.globalData.CustomBar
        })
      }
    })
  },
  /**
   * 生命周期函数--监听页面初次渲染完成
   */
  onShow: function(){
    if(this.data.firstShow){
      this.onRefreshList()
    }
    if (!this.data.firstShow) {
      // this.data.firstShow = true
    }
  },
  // 获取特价列表
  fetchTabList: function () {
    // /product/type/list产品分类列表
    request.get('/bxe-mall/product/type/list').then(result => {
      //成功回调
      var tabList = ['全部']
      var size = 0
      for (let index = 0; index < result.data.length; index++) {
        tabList.push(result.data[index].name)
        size += result.data[index].name.length
      }
      this.data.pageList =  result.data
      this.setData({ tabs: tabList, scroll: size > 14 })
    })
  },
  // Tab 点击切换，并刷新列表;
  onTabChange: function (e) {
    if(this.data.pageIndex == Number(e.detail.index)){
      return
    }
    this.data.pageIndex = Number(e.detail.index)
    if(this.data.pageIndex == 0){
      this.data.form.productTypeId = ''
    } else {
      this.data.form.productTypeId = this.data.pageList[this.data.pageIndex - 1].id
    }
    this.onRefreshList()
  },
  // 下拉刷新...
  onRefreshList: function(){
    this.setData({
      cheapList: [],
      taskList: [],
      ['form.pageNum']: 1,
      loading: true,
      finished: false
    })
    this.fetchCheapList()
    // this.fetchTaskList()
  },
  // 获取特价列表
  fetchCheapList: function () {
    if (this.data.requesting || this.data.finished) {
      return
    }
    if(this.data.loading){
      this.data.requesting = true
    } else {
      this.setData({ requesting: true })
    }
    request.get('/bxe-mall/product/indexList', this.data.form).then(result => {
      //成功回调
      if(this.data.form.pageNum == 1){
        this.setData({ requesting: false, loading: false, finished: true, top: 0, cheapList: result.data })
      } else {
        this.setData({ requesting: false, loading: false, finished: true, cheapList: result.data })
      }
    }).catch(err => {
      //异常回调
      this.setData({ requesting: false, loading: false, finished: true })
    })
  },
  // 获取团购列表
  fetchTaskList: function () {
    if (this.data.requesting || this.data.finished) {
      return
    }
    if(this.data.loading){
      this.data.requesting = true
    } else {
      this.setData({ requesting: true })
    }
    // /product/cheapList特价产品列表
    request.get('/bxe-mall/product/groupList', this.data.form).then(result => {
      //成功回调
      this.setData({ requesting: false, loading: false })
      if (result.data.records.length) {
        var respList = result.data.records
        let nowList = `taskList[${this.data.taskList.length}]`
        var num = this.data.form.pageNum
        var finished = this.data.form.pageNum >= result.data.pages
        this.setData({
          [nowList]: respList,
          total: result.data.total,
          ['form.pageNum']: (num + 1),
          finished
        })
      } else {
        this.setData({
          finished: true
        })
      }
    }).catch(err => {
      //异常回调
      this.setData({ requesting: false, loading: false })
      util.showToast(err)
    })
  },
  // 进入搜索页
  searchList: function (e) {
    wx.navigateTo({
      url: '/pages/mall/search-list/index'
    })
  },
  // 查看团购Item
  lookGroupItem: function (e) {
    var item = this.data.taskList[e.currentTarget.dataset.page][e.currentTarget.dataset.index]
    wx.navigateTo({
      url: '/pages/mall/order-info/index?id=' + item.id
    })
  },
  // 查看特价Item
  lookCheapItem: function (e) {
    var item = this.data.cheapList[e.currentTarget.dataset.index]
    wx.navigateTo({
      url: '/pages/mall/order-info/index?id=' + item.id
    })
  },
  // 进行登录，同时获取到openId，为下一步的微信登录做准备，
  checkLogin: function () {
    wx.login({
      success: res => {
        wx.request({
          url: app.httpUrl + '/user-centre/wx/bxe/session',
          data: { code: res.code },
          method: 'POST',
          success: function (result) {
            if (result.data.code != 0) {
              event.emit('EventMessage', { what: 1, desc: 'Login' })
              return
            }
            app.globalData.openId = result.data.data.openid
            // /commonLogin/login通用登录
            wx.request({
              url: app.httpUrl + '/user-centre/commonLogin/login',
              data: { openid: app.globalData.openId },
              method: 'POST',
              success: function (result) {
                if (result.data.code == 0 && result.data.data.userToken) {
                  app.globalData.token = result.data.data.userToken
                }
              },
              complete: function () {
                event.emit('EventMessage', { what: 1, desc: 'Login' })
              }
            })
          },
          fail: function () {
            event.emit('EventMessage', { what: 1, desc: 'Login' })
          }
        })
      },
      fail: function () {
        event.emit('EventMessage', { what: 1, desc: 'Login' })
      }
    })
  },
  /**
   * 生命周期函数--监听页面卸载
   */
  onUnload: function () {
    event.remove('EventMessage', this)
  }

})