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
    });

    // 获取用户信息
    const userInfo = wx.getStorageSync('userInfo');
    const phoneNumber = userInfo?.phoneNumber || wx.getStorageSync('phoneNumber');
    const userId = wx.getStorageSync('userId') || userInfo?.userId;
    
    // 构建请求参数
    const params = {
      page: this.data.page,
      pageSize: this.data.pageSize
    };
    
    // 只有当电话号码存在时才传递，避免传递空值
    if (phoneNumber) {
      params.phone = phoneNumber;
    }
    
    // 传递userId参数，用于后端过滤动态
    if (userId) {
      params.userId = userId;
    }
    
    API.getPosts(params).then(res => {
      console.log('后端返回的完整响应:', res);
      // 正确处理后端返回的响应格式
      let newPosts = res.data && res.data.posts ? res.data.posts : [];
      console.log('后端返回的动态数量:', newPosts.length);
      console.log('后端返回的动态数据:', newPosts);
      
      // 处理images字段，确保它是一个数组，并添加username字段
      newPosts = newPosts.map(post => {
        if (post.images) {
          // 如果images是字符串，尝试解析为JSON数组
          if (typeof post.images === 'string') {
            try {
              post.images = JSON.parse(post.images);
              // 确保解析后是数组
              if (!Array.isArray(post.images)) {
                post.images = [];
              }
            } catch (e) {
              // 解析失败，设置为空数组
              post.images = [];
            }
          } else if (!Array.isArray(post.images)) {
            // 如果不是字符串也不是数组，设置为空数组
            post.images = [];
          }
        } else {
          // 如果images不存在，设置为空数组
          post.images = [];
        }
        
        // 添加username字段（使用phone的前几位作为用户名）
        if (!post.username) {
          if (post.phone) {
            // 隐藏手机号中间部分
            post.username = post.phone.replace(/(\d{3})\d{4}(\d{4})/, '$1****$2');
          } else {
            post.username = '用户' + post.user_id?.substring(0, 6) || '未知用户';
          }
        }
        
        // 添加time字段用于显示时间
        if (!post.time && post.created_at) {
          const date = new Date(post.created_at);
          post.time = date.toLocaleString('zh-CN', {
            year: 'numeric',
            month: '2-digit',
            day: '2-digit',
            hour: '2-digit',
            minute: '2-digit'
          });
        }
        
        // 确保topic字段存在
        if (post.topic) {
          console.log('动态话题:', post.topic);
        }
        
        // 为了兼容前端模板，添加user对象
        if (!post.user) {
          post.user = {
            avatar: post.avatar_url || '',
            nickname: post.username
          };
        }
        
        // 为了兼容前端模板，添加image字段（使用images数组的第一个元素）
        if (!post.image && post.images && post.images.length > 0) {
          post.image = post.images[0];
        }
        
        // 为了兼容前端模板，添加like_count和comment_count字段
        if (post.likes !== undefined && post.like_count === undefined) {
          post.like_count = post.likes;
        }
        if (post.comments !== undefined && post.comment_count === undefined) {
          post.comment_count = post.comments;
        }
        
        return post;
      });
      
      // 根据status字段过滤动态：0仅自己可见，1所有人可见，2仅自己可见
      newPosts = newPosts.filter(post => {
        // 如果status为1，所有人可见
        if (post.status === 1) {
          return true;
        }
        // 如果status为0或2，仅自己可见
        if (post.status === 0 || post.status === 2) {
          // 检查是否是当前用户的动态
          return post.user_id === userId;
        }
        // 默认显示
        return true;
      });
      
      // 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;
    
    // 获取用户电话号码
    const userInfo = wx.getStorageSync('userInfo');
    const phoneNumber = userInfo?.phoneNumber || wx.getStorageSync('phoneNumber');
    
    if (!phoneNumber) {
      wx.showToast({
        title: '请先登录获取电话号码',
        icon: 'none'
      });
      return;
    }
    
    // 前端临时更新状态
    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 });

    // 调用API
    API.likePost(postId, phoneNumber).then(res => {
      console.log('点赞成功:', res);
      wx.showToast({
        title: res.message || '操作成功',
        icon: 'success'
      });
    }).catch(err => {
      console.error('点赞失败:', err);
      
      // 恢复原始状态
      const originalPosts = 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: originalPosts });
      
      wx.showToast({
        title: '操作失败，请重试',
        icon: 'none'
      });
    });
  },

  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');
      }
    });
  },
  
  // 预览图片
  previewImage(e) {
    const images = e.currentTarget.dataset.images;
    const currentIndex = parseInt(e.currentTarget.dataset.current);
    
    console.log('预览图片:', {
      images,
      currentIndex,
      current: images[currentIndex]
    });
    
    wx.previewImage({
      current: images[currentIndex],
      urls: images,
      success: function(res) {
        console.log('预览图片成功:', res);
      },
      fail: function(err) {
        console.error('预览图片失败:', err);
      }
    });
  },

  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'
    };
  }
});