const API = require('../../utils/api.js');

Page({
  data: {
    hotTopics: [],
    posts: [],
    loading: false,
    hasMore: true,
    page: 1,
    pageSize: 10
  },

  onLoad() {
    this.loadHotTopics();
    this.loadPosts();
  },

  onShow() {
    this.setData({
      page: 1,
      hasMore: true,
      posts: []
    });
    this.loadPosts();
  },

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

  onPullDownRefresh() {
    this.setData({
      page: 1,
      hasMore: true,
      posts: []
    });
    this.loadHotTopics();
    this.loadPosts();
    wx.stopPullDownRefresh();
  },

  loadHotTopics() {
    API.getHotTopics().then(res => {
      if (res.data && res.data.length > 0) {
        this.setData({
          hotTopics: res.data
        });
      } else {
        // 使用默认热门话题
        this.setData({
          hotTopics: [
            { id: 1, name: '今天你吃蛋了么？', count: 123 },
            { id: 2, name: '日常分享', count: 456 },
            { id: 3, name: '鸡蛋行情', count: 789 },
            { id: 4, name: '养殖经验', count: 321 },
            { id: 5, name: '美食分享', count: 654 }
          ]
        });
      }
    }).catch(err => {
      console.error('加载热门话题失败:', err);
      // 出错时使用默认热门话题
      this.setData({
        hotTopics: [
          { id: 1, name: '今天你吃蛋了么？', count: 123 },
          { id: 2, name: '日常分享', count: 456 },
          { id: 3, name: '鸡蛋行情', count: 789 },
          { id: 4, name: '养殖经验', count: 321 },
          { id: 5, name: '美食分享', count: 654 }
        ]
      });
    });
  },

  loadPosts() {
    if (this.data.loading) {
      return;
    }

    this.setData({
      loading: true
    });

    API.getPosts({
      page: this.data.page,
      pageSize: this.data.pageSize
    }).then(res => {
      // 正确处理后端返回的响应格式
      let newPosts = res.data && res.data.posts ? res.data.posts : [];
      
      // 如果是第一页且没有数据，使用默认动态数据
      if (this.data.page === 1 && (!newPosts || newPosts.length === 0)) {
        newPosts = [
          {
            id: 1,
            user_id: '1',
            content: '今天的鸡蛋质量真好，客户都很满意！',
            images: [],
            likes: 12,
            comments: 3,
            created_at: new Date().toISOString(),
            username: '鸡蛋养殖户',
            avatar: '',
            liked: false
          },
          {
            id: 2,
            user_id: '2',
            content: '分享一下我的养殖经验，希望对大家有帮助',
            images: [],
            likes: 8,
            comments: 5,
            created_at: new Date().toISOString(),
            username: '养殖专家',
            avatar: '',
            liked: false
          },
          {
            id: 3,
            user_id: '3',
            content: '鸡蛋行情不错，今天卖了个好价钱',
            images: [],
            likes: 15,
            comments: 2,
            created_at: new Date().toISOString(),
            username: '蛋商小王',
            avatar: '',
            liked: false
          }
        ];
      }
      
      // 根据后端返回的分页信息判断是否还有更多数据
      const shouldHasMore = res.data && res.data.pagination ? 
        this.data.page < res.data.pagination.totalPages : 
        this.data.page < 3;
      
      this.setData({
        posts: this.data.page === 1 ? newPosts : [...this.data.posts, ...newPosts],
        loading: false,
        hasMore: shouldHasMore,
        page: this.data.page + 1
      });
    }).catch(err => {
      console.error('加载动态失败:', err);
      
      // 出错时使用默认动态数据
      if (this.data.page === 1) {
        // 当页码大于3时，设置hasMore为false，显示"暂无更多动态"提示
        const shouldHasMore = this.data.page < 3;
        
        this.setData({
          posts: [
            {
              id: 1,
              user_id: '1',
              content: '今天的鸡蛋质量真好，客户都很满意！',
              images: [],
              likes: 12,
              comments: 3,
              created_at: new Date().toISOString(),
              username: '鸡蛋养殖户',
              avatar: '',
              liked: false
            },
            {
              id: 2,
              user_id: '2',
              content: '分享一下我的养殖经验，希望对大家有帮助',
              images: [],
              likes: 8,
              comments: 5,
              created_at: new Date().toISOString(),
              username: '养殖专家',
              avatar: '',
              liked: false
            },
            {
              id: 3,
              user_id: '3',
              content: '鸡蛋行情不错，今天卖了个好价钱',
              images: [],
              likes: 15,
              comments: 2,
              created_at: new Date().toISOString(),
              username: '蛋商小王',
              avatar: '',
              liked: false
            }
          ],
          loading: false,
          hasMore: shouldHasMore
        });
      } else {
        this.setData({
          loading: false
        });
      }
    });
  },

  viewTopic(e) {
    const topic = e.currentTarget.dataset.topic;
    wx.navigateTo({
      url: `/pages/eggbar/topic-detail?id=${topic.id}`
    });
  },

  viewPost(e) {
    const post = e.currentTarget.dataset.post;
    wx.navigateTo({
      url: `/pages/eggbar/post-detail?id=${post.id}`
    });
  },

  likePost(e) {
    const postId = e.currentTarget.dataset.id;
    const posts = this.data.posts.map(post => {
      if (post.id === postId) {
        return {
          ...post,
          liked: !post.liked,
          likes: post.liked ? post.likes - 1 : post.likes + 1
        };
      }
      return post;
    });

    this.setData({ posts });

    API.likePost(postId).then(res => {
      console.log('点赞成功');
    }).catch(err => {
      console.error('点赞失败:', err);
    });
  },

  commentPost(e) {
    const postId = e.currentTarget.dataset.id;
    wx.navigateTo({
      url: `/pages/eggbar/post-detail?id=${postId}&focusComment=true`
    });
  },

  sharePost(e) {
    const postId = e.currentTarget.dataset.id;
    wx.showShareMenu({
      withShareTicket: true,
      success: () => {
        console.log('分享成功');
      }
    });
  },

  createPost() {
    wx.navigateTo({
      url: '/pages/eggbar/create-post'
    });
  },

  onShareAppMessage() {
    return {
      title: '蛋吧 - 鸡蛋行业交流社区',
      path: '/pages/eggbar/eggbar',
      imageUrl: '/images/eggbar-share.jpg'
    };
  }
});