const app = getApp()

Page({
  data: {
    categoryId: null,
    sortTypes: [
      { label: '综合', value: 'default' },
      { label: '价格', value: 'price' },
      { label: '销量', value: 'sales' },
      { label: '佣金', value: 'commission' }
    ],
    currentSort: 'default',
    goodsList: [],
    page: 1,
    pageSize: 10,
    loading: false,
    hasMore: true
  },

  onLoad(options) {
    const { id } = options
    if (id) {
      this.setData({ categoryId: id })
      wx.setNavigationBarTitle({
        title: options.name || '商品分类'
      })
    }
    this.loadGoodsList()
  },

  // 切换排序
  changeSort(e) {
    const { sort } = e.currentTarget.dataset
    if (this.data.currentSort === sort) return

    this.setData({
      currentSort: sort,
      goodsList: [],
      page: 1,
      hasMore: true
    }, () => {
      this.loadGoodsList()
    })
  },

  // 加载商品列表
  loadGoodsList() {
    if (this.data.loading || !this.data.hasMore) return
    
    this.setData({ loading: true })
    
    // TODO: 调用后端API获取商品列表
    setTimeout(() => {
      const mockGoods = [{
        id: 1,
        name: 'iPhone 14 Pro Max',
        price: '9299.00',
        commission: '186.00',
        image: '/static/images/goods/iphone.png'
      }, {
        id: 2,
        name: '华为 Mate60 Pro',
        price: '8999.00',
        commission: '180.00',
        image: '/static/images/goods/huawei.png'
      }, {
        id: 3,
        name: '小米14 Pro',
        price: '5999.00',
        commission: '120.00',
        image: '/static/images/goods/xiaomi.png'
      }]

      // 根据排序方式处理数据
      let sortedGoods = [...mockGoods]
      switch (this.data.currentSort) {
        case 'price':
          sortedGoods.sort((a, b) => parseFloat(a.price) - parseFloat(b.price))
          break
        case 'commission':
          sortedGoods.sort((a, b) => parseFloat(b.commission) - parseFloat(a.commission))
          break
        case 'sales':
          // 真实场景需要后端返回销量数据
          break
      }

      this.setData({
        goodsList: this.data.page === 1 ? sortedGoods : [...this.data.goodsList, ...sortedGoods],
        loading: false,
        hasMore: sortedGoods.length === this.data.pageSize,
        page: this.data.page + 1
      })
    }, 500)
  },

  // 跳转商品详情
  navigateToDetail(e) {
    const { id } = e.currentTarget.dataset
    wx.navigateTo({
      url: `/pages/goods/detail?id=${id}`
    })
  },

  // 下拉刷新
  onPullDownRefresh() {
    this.setData({
      goodsList: [],
      page: 1,
      hasMore: true
    }, () => {
      this.loadGoodsList()
      wx.stopPullDownRefresh()
    })
  },

  // 触底加载更多
  onReachBottom() {
    this.loadGoodsList()
  }
})