// pages/index/index.js
const contentApi = require('../../api/content');
const categoryApi = require('../../api/category');
const userUtil = require('../../utils/user');

Page({
  data: {
    categories: [],
    currentCategory: 0, // 0表示全部
    contentList: [],
    bannerList: [], // 轮播图数据
    recommendedList: [], // 今日推荐数据
    contentType: null, // null全部, 1电子书, 2听书
    keyword: '',
    current: 1,
    size: 10,
    total: 0,
    loading: false,
    hasMore: true,
    showSearch: false,
    swiperMarginTop: 'calc(130rpx + env(safe-area-inset-top))', // 轮播图的上边距
    recommendedColumns: 3 // 推荐区域每行显示数量（2或3）
  },

  onLoad() {
    this.loadCategories();
    this.loadBannerList();
    this.loadRecommended();
    this.loadContentList();
  },

  onShow() {
    // 首页不需要强制登录，可以浏览
  },

  // 加载分类
  async loadCategories() {
    try {
      const categories = await categoryApi.getCategoryList();
      this.setData({
        categories: [{ categoryId: 0, categoryName: '全部' }, ...categories]
      });
    } catch (error) {
      console.error('加载分类失败:', error);
    }
  },

  // 加载轮播图数据（取前5条热门内容）
  async loadBannerList() {
    try {
      const result = await contentApi.getContentList(1, 5, '', null, null);
      this.setData({
        bannerList: result.records || []
      });
    } catch (error) {
      console.error('加载轮播图失败:', error);
    }
  },

  // 加载今日推荐数据
  async loadRecommended() {
    try {
      const size = this.data.recommendedColumns === 2 ? 4 : 6; // 每行2个显示4个，每行3个显示6个
      const recommended = await contentApi.getRecommended(size);
      this.setData({
        recommendedList: recommended || []
      });
    } catch (error) {
      console.error('加载今日推荐失败:', error);
    }
  },

  // 加载内容列表
  async loadContentList(isLoadMore = false) {
    if (this.data.loading) return;
    
    this.setData({ loading: true });

    try {
      const current = isLoadMore ? this.data.current + 1 : 1;
      const params = {
        current,
        size: this.data.size,
        categoryId: this.data.currentCategory === 0 ? null : this.data.currentCategory,
        contentType: this.data.contentType,
        keyword: this.data.keyword || null
      };

      const result = await contentApi.getContentList(
        params.current,
        params.size,
        params.keyword || '',
        params.contentType,
        params.categoryId
      );

      const contentList = isLoadMore 
        ? [...this.data.contentList, ...result.records]
        : result.records;

      this.setData({
        contentList,
        current: result.current,
        total: result.total,
        hasMore: contentList.length < result.total,
        loading: false
      });
    } catch (error) {
      wx.showToast({
        title: error || '加载失败',
        icon: 'none'
      });
      this.setData({ loading: false });
    }
  },

  // 切换分类
  onCategoryTap(e) {
    const categoryId = e.currentTarget.dataset.id;
    if (categoryId === this.data.currentCategory) return;
    
    this.setData({
      currentCategory: categoryId,
      current: 1
    });
    this.loadContentList();
  },

  // 切换内容类型
  onContentTypeTap(e) {
    const type = e.currentTarget.dataset.type;
    // 将字符串 "null" 转换为真正的 null
    const contentType = type === 'null' ? null : parseInt(type);
    if (contentType === this.data.contentType) return;
    
    this.setData({
      contentType: contentType,
      current: 1
    });
    this.loadContentList();
  },

  // 搜索
  onSearchInput(e) {
    this.setData({
      keyword: e.detail.value
    });
  },

  onSearchConfirm() {
    this.setData({ current: 1 });
    this.loadContentList();
  },

  // 显示/隐藏搜索框
  toggleSearch() {
    const newShowSearch = !this.data.showSearch;
    this.setData({
      showSearch: newShowSearch,
      keyword: '',
      current: 1
    });
    // 动态调整轮播图的margin-top
    if (newShowSearch) {
      // 搜索框显示时，轮播图需要再向下移动
      this.setData({
        swiperMarginTop: 'calc(200rpx + env(safe-area-inset-top))'
      });
    } else {
      // 搜索框隐藏时，恢复原来的位置
      this.setData({
        swiperMarginTop: 'calc(130rpx + env(safe-area-inset-top))'
      });
      this.loadContentList();
    }
  },

  // 跳转到详情页
  goToDetail(e) {
    const contentId = e.currentTarget.dataset.id;
    wx.navigateTo({
      url: `/pages/detail/detail?id=${contentId}`
    });
  },

  // 上拉加载更多
  onReachBottom() {
    if (this.data.hasMore && !this.data.loading) {
      this.loadContentList(true);
    }
  },

  // 下拉刷新
  onPullDownRefresh() {
    this.setData({ current: 1 });
    this.loadContentList().finally(() => {
      wx.stopPullDownRefresh();
    });
  }
});