import { getCategoryList } from '../../services/good/fetchCategoryList';
import { fetchGoodsList } from '../../services/good/fetchGoodsList';

Page({
  data: {
    list: [],
    goodsList: [],
    hasLoaded: false,
    loadMoreStatus: 0,
    categoryId: '',
    categoryName: '',
  },
  pageNum: 1,
  pageSize: 30,
  total: 0,
  async init() {
    try {
      const result = await getCategoryList();
      this.setData({
        list: result,
      });
    } catch (error) {
      console.error('err:', error);
    }
  },

  onShow() {
    this.getTabBar().init();
  },
  onChange(e) {
    const { item, source } = e.detail;
    let categoryId = item.groupId || item.categoryId || '';
    const categoryName = item.name || '';

    // 兼容“全部”按钮的 groupId: `${id}_all`
    if (categoryId && categoryId.toString().endsWith('_all')) {
      categoryId = categoryId.toString().replace('_all', '');
    }

    // 二级分类：跳转到商品列表页；一级分类：当前页加载数据
    if (source === 'child') {
      const url = `/pages/goods/list/index?categoryId=${encodeURIComponent(categoryId)}&categoryName=${encodeURIComponent(categoryName)}`;
      wx.navigateTo({ url });
      return;
    }

    // 一级分类只在当前页加载商品
    this.pageNum = 1;
    this.setData({ categoryId, categoryName, loadMoreStatus: 0 });
    this.loadCategoryGoods(true);
  },

  // 组装查询参数
  buildQueryParams(reset = true) {
    const params = {
      pageNum: reset ? 1 : this.pageNum + 1,
      pageSize: this.pageSize,
      category_id: this.data.categoryId || undefined,
    };
    return params;
  },

  async loadCategoryGoods(reset = true) {
    const { loadMoreStatus, goodsList = [] } = this.data;
    if (loadMoreStatus !== 0) return;

    const params = this.buildQueryParams(reset);
    this.setData({ loadMoreStatus: 1 });
    try {
      const result = await fetchGoodsList(params);

      if (!result || !result.spuList) {
        this.setData({ hasLoaded: true, loadMoreStatus: 0 });
        return;
      }

      const { spuList, totalCount = 0 } = result;
      const merged = reset ? spuList : goodsList.concat(spuList);
      const status = merged.length === totalCount ? 2 : 0;

      this.pageNum = params.pageNum || 1;
      this.total = totalCount;

      this.setData({
        goodsList: merged,
        loadMoreStatus: status,
        hasLoaded: true,
      });
    } catch (error) {
      console.error('获取分类商品失败:', error);
      this.setData({ loadMoreStatus: 0, hasLoaded: true });
    }
  },

  onReachBottom() {
    const { goodsList } = this.data;
    const total = this.total || 0;
    if (goodsList.length >= total && total > 0) {
      this.setData({ loadMoreStatus: 2 });
      return;
    }
    this.loadCategoryGoods(false);
  },

  handleAddCart() {
    wx.showToast({ title: '点击加购', icon: 'none' });
  },


  onLoad() {
    this.init(true);
  },

  // 分享功能
  onShareAppMessage() {
    return {
      title: '商品分类 - 浏览更多精选商品',
      path: '/pages/category/index'
    };
  },

  // 分享到朋友圈
  onShareTimeline() {
    return {
      title: '商品分类 - 浏览更多精选商品'
    };
  },

  handleClickGoods(e) {
    const { index } = e.detail || {};
    const { goodsList = [] } = this.data;
    const item = goodsList[index];
    const spuId = item && (item.spuId || item.id || item.skuId);
    if (!spuId) {
      wx.showToast({ title: '无法识别商品ID', icon: 'none' });
      return;
    }
    wx.navigateTo({
      url: `/pages/goods/details/index?spuId=${encodeURIComponent(spuId)}`
    });
  },
});