// 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();
    }
})