Page({
  data: {
    products: [],
    totalAmount: 0,
    dingweiimg: '',
    youjiantouimg: '',
  },

  onLoad() {
    const selectedItems = wx.getStorageSync('checkoutItems') || [];

    // 标准化 quantity 字段
    const products = selectedItems.map(item => ({
      ...item,
      quantity: item.num
    }));
    console.log(123123);

    this.setData({ products }, () => {
      this.calculateTotal();
    });

    const fileIDs = [
      'cloud://cloud1-6g98iw7i28b01747.636c-cloud1-6g98iw7i28b01747-1367995226/images/icon/dingwei.png',
      'cloud://cloud1-6g98iw7i28b01747.636c-cloud1-6g98iw7i28b01747-1367995226/images/icon/youjiantou.png',
    ];
    
    // 并发下载多个 fileID
    Promise.all(
      fileIDs.map(fileID => wx.cloud.downloadFile({ fileID }))
    ).then(results => {
      // 每个 result 对应一个下载结果
      const tempFilePaths = results.map(r => r.tempFilePath);
      console.log('全部下载成功:', tempFilePaths);
      this.setData({
        dingweiimg: tempFilePaths[0],
        youjiantouimg: tempFilePaths[1],
      });
    }).catch(err => {
      console.error('有文件下载失败:', err);
    });
  },

  decreaseQuantity(e) {
    const index = e.currentTarget.dataset.index;
    let products = this.data.products;
    if (products[index].quantity > 1) {
      products[index].quantity--;
      this.setData({ products });
      this.calculateTotal();
    }
  },

  increaseQuantity(e) {
    const index = e.currentTarget.dataset.index;
    let products = this.data.products;
    products[index].quantity++;
    this.setData({ products });
    this.calculateTotal();
  },

  onChange(e) {
    const { id } = e.currentTarget.dataset;
    const { detail } = e;
  
    const products = this.data.products.map(item => {
      if (item._id === id) {
        return { ...item, quantity: detail };
      }
      return item;
    });
  
    this.setData({ products }, () => {
      this.calculateTotal();
    });
  },

  calculateTotal() {
    let totalAmount = 0;
    this.data.products.forEach(item => {
      totalAmount += item.price * item.quantity;
    });
    this.setData({ totalAmount });
  },

  handlePay() {
    // 处理支付逻辑
  },

  setGridView() {
    wx.navigateTo({
      url: '/subpackages/addresslist/addresslist'
    });
  }
});