import { config, cdnBase } from '../../config/index';

/** 获取首页数据 */
function mockFetchHome() {
  const { delay } = require('../_utils/delay');
  const { genSwiperImageList } = require('../../model/swiper');
  return delay().then(() => {
    return {
      swiper: genSwiperImageList(),
      tabList: [
        {
          text: '热门商品',
          key: 'hot',
        },
        {
          text: '精选推荐',
          key: 0,
        },
        {
          text: '夏日防晒',
          key: 1,
        },
        {
          text: '二胎大作战',
          key: 2,
        },
        {
          text: '人气榜',
          key: 3,
        },
        {
          text: '好评榜',
          key: 4,
        },
        {
          text: 'RTX 30',
          key: 5,
        },
        {
          text: '手机也疯狂',
          key: 6,
        },
      ],
      activityImg: `${cdnBase}/activity/banner.png`,
    };
  });
}

/** 获取首页数据 */
export function fetchHome() {
  if (config.useMock) {
    return mockFetchHome();
  }
  
  return new Promise((resolve, reject) => {
    // 并行请求轮播图和分类数据
    const bannerRequest = new Promise((resolve, reject) => {
      wx.request({
        url: `${config.apiBase}/banners`,
        method: 'GET',
        success: (res) => {
          if (res.statusCode === 200 && res.data.code === 200) {
            resolve(res.data.data || []);
          } else {
            console.error('获取轮播图失败:', res.data);
            resolve([]); // 失败时返回空数组，不阻断整个流程
          }
        },
        fail: (err) => {
          console.error('轮播图请求失败:', err);
          resolve([]); // 失败时返回空数组
        }
      });
    });

    const categoryRequest = new Promise((resolve, reject) => {
      wx.request({
        url: `${config.apiBase}/products/categories`,
        method: 'GET',
        success: (res) => {
          if (res.statusCode === 200 && res.data.code === 200) {
            resolve(res.data.data || []);
          } else {
            console.error('获取分类失败:', res.data);
            resolve([]); // 失败时返回空数组
          }
        },
        fail: (err) => {
          console.error('分类请求失败:', err);
          resolve([]); // 失败时返回空数组
        }
      });
    });

    // 获取推荐商品
    const recommendRequest = new Promise((resolve) => {
      wx.request({
        url: `${config.apiBase}/products/recommend`,
        method: 'GET',
        success: (res) => {
          if (res.statusCode === 200 && res.data.code === 200) {
            console.log('推荐商品数据:', res.data.data);
            resolve(res.data.data || []);
          } else {
            console.error('获取推荐商品失败:', res.data);
            resolve([]);
          }
        },
        fail: (err) => {
          console.error('推荐商品请求失败:', err);
          resolve([]);
        }
      });
    });

    // 获取热门商品
    const hotRequest = new Promise((resolve) => {
      wx.request({
        url: `${config.apiBase}/products/hot`,
        method: 'GET',
        success: (res) => {
          if (res.statusCode === 200 && res.data.code === 200) {
            console.log('热门商品数据:', res.data.data);
            resolve(res.data.data || []);
          } else {
            console.error('获取热门商品失败:', res.data);
            resolve([]);
          }
        },
        fail: (err) => {
          console.error('热门商品请求失败:', err);
          resolve([]);
        }
      });
    });

    // 等待所有请求都完成
    Promise.all([bannerRequest, categoryRequest, recommendRequest, hotRequest])
      .then(([banners, categories, recommendProducts, hotProducts]) => {
        // 转换轮播图数据格式 - TDesign轮播图组件需要字符串数组
        const swiper = banners.map(banner => banner.image);
        console.log('轮播图数据:', swiper);

        // 转换分类数据为tabList格式，在前面添加热门商品tab
        const tabList = [
          {
            text: '热门商品',
            key: 'hot',
          },
          ...categories.map((category, index) => ({
            text: category.name,
            key: category.id || index,
          }))
        ];

        resolve({
          swiper,
          tabList,
          recommendProducts,
          hotProducts,
          activityImg: `${cdnBase}/activity/banner.png`,
        });
      })
      .catch((error) => {
        console.error('获取首页数据失败:', error);
        reject(error);
      });
  });
}