import {API_HOST, SERVICE_HOST} from '../../common/config';
import {GET, POST} from '../../common/request';
import {parseBrandListData, cancelFilterSelectState} from '../../utils/productList';
import objectAssign from '../../vendors/object-assign';
import {shouldDiscardTap} from '../../utils/util';
import {
  logEvent,
  YB_PAGE_OPEN_L,
} from '../../common/analytics.js'

//获取应用实例
let app = getApp();

const screenHeight = app.globalData.systemInfo.screenHeight;
const  windowWidth = app.globalData.systemInfo.windowWidth;
const  windowHeight = app.globalData.systemInfo.windowHeight;

const DEVICE_WIDTH_RATIO = windowWidth / 320;

let listWidth = Math.ceil(137.5 * DEVICE_WIDTH_RATIO);
let listHeight = Math.ceil(254 * DEVICE_WIDTH_RATIO);

const IMAGE_WIDTH = 145;
const IMAGE_HEIGHT = 193;
const IMAGE_RATIO = IMAGE_HEIGHT / IMAGE_WIDTH;
let listImageTop = 31;
let listImageWidth = listWidth;
let listImageHeight = Math.ceil(listWidth * IMAGE_RATIO);

let listMarginHorizontal = (windowWidth - listWidth * 2) / 3;
let PV_ID = new Date().getTime() + '';

Page({
  data:{
    lastTapTimeStamp: 0,

    screenHeight,
    windowHeight,
    listWidth,
    listHeight,
    listImageWidth,
    listImageHeight,
    listImageTop,
    listMarginHorizontal,

    from_page_name: '',
    from_page_param: '',
    current_page_name: 'goodsList',
    current_page_param: '',

    title: '',
    page_param: {},

    filter: {
      item1: {
        key: 'item1',
        name: '默认',
        asc: '',
        isRadio: true,
        selected: true,
      },
      item2: {
        key: 'item2',
        name: '新品',
        asc: 's_t_desc',
        isRadio: true,
        selected: false, 
      },
      item3: {
        key: 'item3',
        name: '价格',
        defaults: 'asc',
        asc: 's_p_asc',
        desc: 's_p_desc',
        isRadio: false,
        isAsc: true,
        selected: false, 
      },
      item4: {
        key: 'item4',
        name: '折扣',
        defaults: 'desc',
        asc: 'p_d_desc',
        desc: 'p_d_asc',
        isRadio: false,
        isAsc: false,
        selected: false, 
      }
    },
    filterGenderItem: {
      key: 'filterGenderItem',
      name: '男生',
      isRadio: true,
      selected: true,
      hiddenGenderSelectView: true,
    },
    genderFilter: {
      item1: {
        key: 'item1',
        name: '男生/BOYS',
        selected: true,
        value: '1,3',
        title: '男生',
      },
      item2: {
        key: 'item2',
        name: '女生/GIRLS',
        selected: false,
        value: '2,3',
        title: '女生',
      }
    },
    list: {
      isLoading: false,
      error: null,
      data: null,
      pageSize: 60,
      currentPage: 0,
      pageCount: 0,
      total: 0,
      endReached: false,
    },

    isShowIndicator: false,
    scrollTop: 0
  },
  resetChannelFilterInfo: function (gender) {
    let filterGenderItem = this.data.filterGenderItem;
    let genderFilter = this.data.genderFilter;
    filterGenderItem.name = gender;
    for (let itemKey in genderFilter) {
      if (genderFilter.hasOwnProperty(itemKey)) {
        if (genderFilter[itemKey].title == gender) {
          genderFilter[itemKey].selected = true;
        } else {
          genderFilter[itemKey].selected = false;
        }
      }
    }
    this.setData({ filterGenderItem, genderFilter });
  },
  onLoad:function(options){
    // 生命周期函数--监听页面加载
    let title = options.title;
    let page_param = options;
    let from_page_name = options.page_name ? options.page_name : '';
    let from_page_param = options.page_param ? options.page_param : '';
    let current_page_param = options.categoryId;
    this.setData({
      title, page_param, from_page_name, from_page_param, current_page_param
    });

    this.resetChannelFilterInfo('筛选');

    var pages = getCurrentPages()
    var currentPage = pages[pages.length - 1]
    var url = currentPage.route

    let params = {
      PAGE_NAME: this.data.current_page_name,
      PAGE_PARAM: this.data.current_page_param,
      FROM_PAGE_NAME: this.data.from_page_name,
      FROM_PAGE_PARAM: this.data.from_page_param,
      PV_ID: PV_ID,
      PAGE_PATH: url
    };
    logEvent(YB_PAGE_OPEN_L, params);

    this.fetchListData();
    
  },
  onReady:function(){
    // 生命周期函数--监听页面初次渲染完成
    
    wx.setNavigationBarTitle({
      title: this.data.title,
    });
  },
  onShow:function(){
    // 生命周期函数--监听页面显示
    
  },
  onHide:function(){
    // 生命周期函数--监听页面隐藏
    
  },
  onUnload:function(){
    // 生命周期函数--监听页面卸载
    
  },
  onPullDownRefresh: function() {
    // 页面相关事件处理函数--监听用户下拉动作
    let params = {
      PAGE_NAME: this.data.current_page_name,
      PAGE_PARAM: this.data.current_page_param,
      FROM_PAGE_NAME: this.data.from_page_name,
      FROM_PAGE_PARAM: this.data.from_page_param,
      PV_ID: PV_ID,
    };
    logEvent(YB_PAGE_OPEN_L, params);
  },
  loadMore: function() {
    // 页面上拉触底事件的处理函数
    
    this.fetchListData();
  },

  //品牌商品列表
  fetchListData: function() {
    if (this.data.list.isLoading || this.data.list.endReached) {
      return;
    }

    let page = this.data.list.currentPage + 1;
    let param = {
      method: 'app.search.category',
      page,
      limit: this.data.list.pageSize
    }
    Object.assign(param, this.data.page_param);
    let list = objectAssign(this.data.list, {isLoading: true,});
    this.setData({list});

    GET(API_HOST, param)
    .then(json => {
      if (!json || !json.code || json.code != 200) {
        let list = objectAssign(this.data.list, {isLoading: false, error: {code: json.code, message: json.message}});
        this.setData({list});
        return;
      }

      json = json.data;

      let currentPage = json && json.page ? json.page : 1;
      let pageCount = json && json.page_total ? json.page_total : 0;
      let total = json && json.total ? json.total : 0;
      let endReached = currentPage == pageCount;

      let data = json.product_list;
      data = parseBrandListData(data, listImageWidth, listImageHeight);

      if (currentPage > 1) {
        let oldList = this.data.list.data;
        data = [...oldList, ...data];
      }

      let newList = {
        isLoading: false,
        data,
        currentPage,
        pageCount,
        total,
        endReached,
      };
      let list = objectAssign(this.data.list, newList);
      this.setData({list});
    })
    .catch(error => {
      let list = objectAssign(this.data.list, {isLoading: false, error,});
      this.setData({list});
    });
  },

  //商品点击进入商品详情
  productCellTapped: function(event) {
    if (shouldDiscardTap(event.timeStamp, this.data.lastTapTimeStamp)) {
      return;
    }
    this.setData({lastTapTimeStamp: event.timeStamp});
    
    let data = event.currentTarget.dataset;
    let productSkn = data.productSkn;
    wx.navigateTo({
      url: '../goodsDetail/goodsDetail?productSkn=' + productSkn + '&page_name=' + this.data.current_page_name + '&page_param=' +       this.data.current_page_param,
    });
  },

  //点击筛选
  filterTapped: function(event) {
    let data = event.currentTarget.dataset;
    let key = data.key;

    let item = this.data.filter[key];
    // 单选
    if (item.isRadio) {
      // 已选中 结束
      if (item.selected) {
        return;
      }

      // 选中当前filter
      item.selected = true;

      // 遍历所有filter，设置非当前filter为不选中
      let newFilters = cancelFilterSelectState(this.data.filter, key);
      newFilters[key] = item;

      let newList = objectAssign(this.data.list, {currentPage: 0, pageCount: 0, total: 0, endReached: false,});
      let page_param = this.data.page_param;
      page_param.order = item.asc;
      this.setData({ filter: newFilters, page_param, list: newList});

      this.fetchListData();
    // 多选
    } else {

      // 已选中
      if (item.selected) {

        // 修改当前filter排序
        item.isAsc = !item.isAsc;
        let page_param = this.data.page_param;
        page_param.order = item.isAsc ? item.asc : item.desc;
        let newFilters = this.data.filter;
        newFilters[key] = item;

        let newList = objectAssign(this.data.list, {currentPage: 0, pageCount: 0, total: 0, endReached: false,});
        this.setData({ page_param, filter: newFilters, list: newList});

        this.fetchListData();
      // 未选中
      } else {

        // 选中当前filter
        item.selected = true;
        // 读取当前filter默认排序
        let defaultKey = item.defaults;
        let page_param = this.data.page_param;
        page_param.order = item[defaultKey];
        item.isAsc = defaultKey == 'asc';

        // 遍历所有filter，设置非当前filter为不选中
        let newFilters = cancelFilterSelectState(this.data.filter, key);
        newFilters[key] = item;

        let newList = objectAssign(this.data.list, {currentPage: 0, pageCount: 0, total: 0, endReached: false,});
        this.setData({page_param, filter: newFilters, list: newList});

        this.fetchListData();
      }
    }
  },

  hiddenGenderFilter: function (event) {
    let filterGenderItem = this.data.filterGenderItem;
    filterGenderItem.hiddenGenderSelectView = true;
    this.setData({ filterGenderItem });
  },
  filterGenderItemTapped: function (event) {
    let filterGenderItem = this.data.filterGenderItem;
    filterGenderItem.hiddenGenderSelectView = !filterGenderItem.hiddenGenderSelectView;
    this.setData({ filterGenderItem });
  },

  maskTouchStart: function (event) {
    this.hiddenGenderFilter();
  },
  genderFilterTapped: function (event) {
    let data = event.currentTarget.dataset;
    let key = data.key;
    let item = this.data.genderFilter[key];

    if (item.selected) {
      this.hiddenGenderFilter();
      return;
    }

    let filterGenderItem = this.data.filterGenderItem;
    filterGenderItem.name = item.title;
    // 选中当前filter
    item.selected = true;
    // 遍历所有filter，设置非当前filter为不选中
    let newFilters = cancelFilterSelectState(this.data.genderFilter, key);
    newFilters[key] = item;

    let newList = objectAssign(this.data.list, { currentPage: 0, pageCount: 0, total: 0, endReached: false, });
    let page_param = this.data.page_param;
    page_param.gender = item.value;
    this.setData({ filterGenderItem, genderFilter: newFilters, list: newList, page_param });
    this.hiddenGenderFilter();
    this.fetchListData();

  },

  onScroll: function(e) {
    var { scrollTop } = e.detail;
    var isShow = scrollTop > windowHeight * 2 ? true : false;
    if (isShow != this.data.isShowIndicator) {
      this.setData({
        isShowIndicator: isShow
      });
    }
  },

  backToTop: function () {
    this.setData({
      scrollTop: 0
    })
  }

})