text: var util = require('../../utils/util.js');
  var api = require('../../config/api.js');
  
  Page({
    data: {
      navList: [],
      goodsList: [],
      id: 0,
      currentCategory: {},
      scrollLeft: 0,
      scrollTop: 0,
      scrollHeight: 0,
      page: 1,
      size: 100
    },
    onLoad: function(options) {
      // 页面初始化 options为页面跳转所带来的参数
      var that = this;
      if (options.id) {
        that.setData({
          id: parseInt(options.id)
        });
      }
  
      wx.getSystemInfo({
        success: function(res) {
          that.setData({
            scrollHeight: res.windowHeight
          });
        }
      });
  
  
      this.getCategoryInfo();
  
    },
    getCategoryInfo: function() {
      let that = this;
      util.request(api.GoodsCategory, {
          id: this.data.id
        })
        .then(function(res) {
  
          if (res.errno == 0) {
            that.setData({
              navList: res.data.brotherCategory,
              currentCategory: res.data.currentCategory
            });
  
            wx.setNavigationBarTitle({
              title: res.data.parentCategory.name
            })
  
            // 当id是L1分类id时，这里需要重新设置成L1分类的一个子分类的id
            if (res.data.parentCategory.id == that.data.id) {
              that.setData({
                id: res.data.currentCategory.id
              });
            }
  
            //nav位置
            let currentIndex = 0;
            let navListCount = that.data.navList.length;
            for (let i = 0; i < navListCount; i++) {
              currentIndex += 1;
              if (that.data.navList[i].id == that.data.id) {
                break;
              }
            }
            if (currentIndex > navListCount / 2 && navListCount > 5) {
              that.setData({
                scrollLeft: currentIndex * 60
              });
            }
            that.getGoodsList();
  
          } else {
            //显示错误信息
          }
  
        });
    },
    onReady: function() {
      // 页面渲染完成
    },
    onShow: function() {
      // 页面显示
      console.log(1);
    },
    onHide: function() {
      // 页面隐藏
    },
    getGoodsList: function() {
      var that = this;
  
      util.request(api.GoodsList, {
          categoryId: that.data.id,
          page: that.data.page,
          size: that.data.size
        })
        .then(function(res) {
          that.setData({
            goodsList: res.data.goodsList,
          });
        });
    },
    onUnload: function() {
      // 页面关闭
    },
    switchCate: function(event) {
      if (this.data.id == event.currentTarget.dataset.id) {
        return false;
      }
      var that = this;
      var clientX = event.detail.x;
      var currentTarget = event.currentTarget;
      if (clientX < 60) {
        that.setData({
          scrollLeft: currentTarget.offsetLeft - 60
        });
      } else if (clientX > 330) {
        that.setData({
          scrollLeft: currentTarget.offsetLeft
        });
      }
      this.setData({
        id: event.currentTarget.dataset.id
      });
  
      this.getCategoryInfo();
    }
  })