Page({
  data: {
    productName: '',
    specification: '',
    price: 0,
    quantity: 1,
    totalPrice: 0,
    loading: false,
    error: ''
  },
  onLoad(options) {
    if (options.productName && options.specification && options.price) {
      const price = parseFloat(options.price) || 0;
      this.setData({
        productName: decodeURIComponent(options.productName),
        specification: decodeURIComponent(options.specification),
        price: price,
        totalPrice: price
      });
    }
  },
  
  // 件数输入变化
  onQuantityChange(e) {
    const quantity = parseInt(e.detail.value) || 1;
    this.setData({
      quantity: quantity,
      totalPrice: this.data.price * quantity
    });
  },
  
  // 计算价格
  calculatePrice() {
    const totalPrice = this.data.price * this.data.quantity;
    this.setData({
      totalPrice: totalPrice
    });
    wx.showToast({
      title: '计算完成',
      icon: 'success',
      duration: 1000
    });
  },
  
  // 返回上一页
  goBack() {
    wx.navigateBack();
  }
});