const app = getApp();

Page({
  data: {
    userInfo: null,
    currentStore: null,
    products: [],
    loading: false,
    page: 1,
    pageSize: 20,
    hasMore: true,
    showProductModal: false,
    currentProduct: null,
  },

  onLoad() {
    this.initData();
  },

  onShow() {
    this.setData({
      userInfo: app.globalData.userInfo,
      currentStore: app.globalData.currentStore,
    });

    // 门店切换后刷新商品
    if (app.globalData.storeChanged) {
      app.globalData.storeChanged = false;
      this.setData({ page: 1, hasMore: true, products: [] });
      this.fetchProducts();
    }
  },

  onPullDownRefresh() {
    this.setData({ page: 1, hasMore: true });
    this.fetchProducts().then(() => {
      wx.stopPullDownRefresh();
    });
  },

  onReachBottom() {
    if (this.data.hasMore && !this.data.loading) {
      this.loadMore();
    }
  },

  async initData() {
    if (!app.globalData.token) {
      try {
        await app.login();
      } catch (e) {
        console.error("登录失败:", e);
      }
    }

    this.setData({
      userInfo: app.globalData.userInfo,
      currentStore: app.globalData.currentStore,
    });
    this.fetchProducts();
  },

  async fetchProducts() {
    this.setData({ loading: true });

    try {
      const params = {
        page: this.data.page,
        pageSize: this.data.pageSize,
      };

      // 根据当前门店筛选商品
      if (this.data.currentStore && this.data.currentStore.storeId) {
        params.store_id = this.data.currentStore.storeId;
      }

      const res = await app.request("/api/points/products", params);

      const products = res.data.list || [];
      this.setData({
        products:
          this.data.page === 1 ? products : this.data.products.concat(products),
        hasMore: products.length >= this.data.pageSize,
      });
    } catch (e) {
      console.error("获取商品列表失败:", e);
    } finally {
      this.setData({ loading: false });
    }
  },

  loadMore() {
    this.setData({ page: this.data.page + 1 });
    this.fetchProducts();
  },

  viewProduct(e) {
    const product = e.currentTarget.dataset.product;
    this.setData({
      currentProduct: product,
      showProductModal: true,
    });
  },

  closeProductModal() {
    this.setData({ showProductModal: false });
  },

  async exchangeProduct() {
    const product = this.data.currentProduct;

    wx.showModal({
      title: "确认兑换",
      content: `确定使用 ${product.pointsRequired} 积分兑换「${product.name}」吗？\n请到 ${product.storeName} 领取`,
      success: async (res) => {
        if (!res.confirm) return;

        wx.showLoading({ title: "兑换中..." });

        try {
          const exchangeRes = await app.request(
            "/api/points/exchange",
            {
              product_id: product.id,
            },
            "POST",
          );

          wx.hideLoading();

          // 更新用户积分
          const newPoints =
            this.data.userInfo.totalPoints - product.pointsRequired;
          app.globalData.userInfo.totalPoints = newPoints;
          this.setData({
            "userInfo.totalPoints": newPoints,
            showProductModal: false,
          });

          wx.showModal({
            title: "兑换成功",
            content: `请到 ${product.storeName} 出示兑换码领取\n兑换码: ${exchangeRes.data.exchangeCode}`,
            showCancel: false,
            success: () => {
              wx.navigateTo({ url: "/pages/points/order/index" });
            },
          });

          this.fetchProducts();
        } catch (e) {
          wx.hideLoading();
          console.error("兑换失败:", e);
        }
      },
    });
  },

  goToRecords() {
    wx.navigateTo({ url: "/pages/points/records/index" });
  },

  goToOrders() {
    wx.navigateTo({ url: "/pages/points/order/index" });
  },
});