// pages/agent/index/index.js
import { paperCategoryList, getProductList } from "../../api/ztb"
const app = getApp()

Page({
  /**
   * 页面的初始数据
   */
  data: {
    height: app.globalData.fragmentHeight - 100,
    kg: app.globalData.kg,
    loading: true,
    requesting: false,
    finished: false,
    cateList: [],
    cateScroll: false,
    top: 0,
    orderList: [],
    form: {
      firstCategoryId: '',
      pageNum: 1
    }
  },
  /**
   * 生命周期函数--监听页面加载
   */
  onLoad: function (options) {
    this.setData({ height: app.globalData.fragmentHeight, kg: app.globalData.kg, CustomBar: app.globalData.CustomBar })
    this.fetchCateList()
    this.fetchGoodsList()
  },
  fetchCateList: function(){
    paperCategoryList({ type: 1 }).then(result => {
      var cateList = [{id: '', name: '全部'}].concat(result.data)
      this.setData({ cateList: cateList, cateScroll: cateList.length >= 5 })
    })
  },
  onCategoryChange: function (e) {
    if (this.data.form.firstCategoryId == e.detail.key) {
      return
    }
    this.setData({ ['form.firstCategoryId']: e.detail.key })
    this.onRefreshList()
  },
  // 下拉刷新...
  onRefreshList: function () {
    this.setData({
      orderList: [],
      ['form.pageNum']: 1,
      loading: true,
      finished: false
    })
    this.fetchGoodsList()
  },
  // 获取特价列表
  fetchGoodsList: function () {
    if (this.data.requesting || this.data.finished) {
      return
    }
    if (this.data.loading) {
      this.data.requesting = true
    } else {
      this.setData({ requesting: true })
    }
    getProductList(this.data.form).then(result => {
      //成功回调
      if (result.data.records.length) {
        var respList = result.data.records
        let nowList = `orderList[${this.data.orderList.length}]`
        var num = result.data.current
        var finished = result.data.current >= result.data.pages
        if(this.data.form.pageNum == 1){
          this.setData({
            [nowList]: respList,
            total: result.data.total,
            ['form.pageNum']: (num + 1),
            top: 0,
            finished,
            requesting: false,
            loading: false
          })
        } else {
          this.setData({
            [nowList]: respList,
            total: result.data.total,
            ['form.pageNum']: (num + 1),
            finished,
            requesting: false,
            loading: false
          })
        }
      } else {
        this.setData({ finished: true, requesting: false, loading: false })
      }
    }).catch(err => {
      this.setData({ requesting: false, loading: false })
    })
  },
  lookItem: function (e) {
    var item = this.data.orderList[e.currentTarget.dataset.page][e.currentTarget.dataset.index]
    wx.navigateTo({ url: '/pages/purchase/detail/index?id=' + item.id })
  }

})