// pages/coupon-list/index.js
import { getCouponReceive } from '../../api/user.js'
import { getCoupons } from '../../api/api.js'

const app = getApp()

Page({
  /**
   * 页面的初始数据
   */
  data: {
    parameter: {
      navbar: '1',
      return: '1',
      title: '领取优惠券',
      color: false
    },
    couponsList: [],
    loading: false,
    loadend: false,
    page: 1,
    limit: 20
  },

  /**
   * 授权回调
   */
  onLoadFun: function () {
    this.getUseCoupons()
  },

  /** 领取优惠券 */
  getCoupon: function (e) {
    var that = this
    var id = e.currentTarget.dataset.id
    var index = e.currentTarget.dataset.index
    var list = that.data.couponsList
    getCouponReceive({
      couponId: id
    }).then(
      function (res) {
        list[index].is_use = true
        that.setData({
          couponsList: list
        })
        app.Tips({
          title: '领取成功'
        })
      },
      function (res) {
        return app.Tips({
          title: res.msg
        })
      }
    )
  },

  /**
   * 生命周期函数--监听页面加载
   */
  onLoad: function (options) {},

  /**
   * 获取领取优惠券列表
   */
  getUseCoupons: function () {
    var that = this
    if (this.data.loadend) return false
    if (this.data.loading) return false
    that.setData({
      loading: true,
      loadTitle: '正在搜索'
    })
    getCoupons({
      page: this.data.page,
      limit: this.data.limit
    })
      .then(res => {
        var list = res.data,
          loadend = list.length < that.data.limit
        var couponsList = app.SplitArray(list, that.data.couponsList)
        that.setData({
          loading: false,
          couponsList: couponsList,
          page: that.data.page + 1,
          loadend: loadend,
          loadTitle: loadend ? '已全部加载' : '加载更多'
        })
      })
      .catch(err => {
        that.setData({
          loading: false,
          loadTitle: '加载更多'
        })
      })
  },

  /**
   * 页面上拉触底事件的处理函数
   */
  onReachBottom: function () {
    this.getUseCoupons()
  }
})