// pages/forum-detail/forum-detail.js
const {forumData} = require('../../utils/data.js')
const learningTracker = require('../../utils/learningTracker.js')
const { showSuccess } = require('../../utils/util.js')

// pages/forum-detail/forum-detail.js
const userManager = require('../../utils/userManager.js')

Page({
  data: {
    post: null,
    commentText: '',
    comments: [],
    postId: null
  },

  onLoad(options) {
    const { id } = options
    this.setData({ postId: parseInt(id) })
    this.loadPostDetail(id)
  },

  onShow() {
    // 开始跟踪学习时间
    learningTracker.onPageShow('forum')
  },

  onHide() {
    // 停止跟踪学习时间
    learningTracker.onPageHide()
  },

  onUnload() {
    // 记录学习时长
    learningTracker.onPageUnload()
  },

  // 加载帖子详情
  loadPostDetail(id) {
    let posts = wx.getStorageSync('forumPosts') || forumData
    const post = posts.find(p => p.id === parseInt(id))
    
    if (post) {
      // 增加浏览量
      post.views += 1
      
      // 检查是否已收藏
      const favoritePosts = wx.getStorageSync('favoritePosts') || []
      post.isFavorite = favoritePosts.some(fav => fav.id === post.id)
      
      posts = posts.map(p => p.id === post.id ? post : p)
      wx.setStorageSync('forumPosts', posts)
      
      // 加载评论
      const comments = this.loadComments(parseInt(id))
      
      this.setData({ 
        post,
        comments
      })
    }
  },

  // 加载评论
  loadComments(postId) {
    const allComments = wx.getStorageSync('forumComments') || {}
    return allComments[postId] || []
  },

  // 保存评论
  saveComments(postId, comments) {
    const allComments = wx.getStorageSync('forumComments') || {}
    allComments[postId] = comments
    wx.setStorageSync('forumComments', allComments)
    
    // 更新帖子的评论数
    let posts = wx.getStorageSync('forumPosts') || forumData
    posts = posts.map(p => {
      if (p.id === postId) {
        p.comments = comments.length
      }
      return p
    })
    wx.setStorageSync('forumPosts', posts)
  },

  // 点赞
  onLike() {
    const { post } = this.data
    let posts = wx.getStorageSync('forumPosts') || forumData
    
    posts = posts.map(p => {
      if (p.id === post.id) {
        p.isLiked = !p.isLiked
        p.likes = p.isLiked ? p.likes + 1 : p.likes - 1
      }
      return p
    })
    
    wx.setStorageSync('forumPosts', posts)
    
    this.setData({
      post: {
        ...post,
        isLiked: !post.isLiked,
        likes: post.isLiked ? post.likes - 1 : post.likes + 1
      }
    })
  },
  
  // 收藏帖子
  onFavorite() {
    const { post } = this.data
    
    if (!post || !post.id || !post.title) {
      wx.showToast({
        title: '帖子数据异常',
        icon: 'none'
      })
      console.error('帖子数据不完整:', post)
      return
    }
    
    let favoritePosts = wx.getStorageSync('favoritePosts') || []
    const index = favoritePosts.findIndex(p => p.id === post.id)
    
    if (index > -1) {
      // 已收藏，取消收藏
      favoritePosts.splice(index, 1)
      wx.setStorageSync('favoritePosts', favoritePosts)
      
      console.log('取消收藏后的列表:', favoritePosts)
      
      // 更新帖子状态
      let posts = wx.getStorageSync('forumPosts') || []
      posts = posts.map(p => {
        if (p.id === post.id) {
          p.isFavorite = false
        }
        return p
      })
      wx.setStorageSync('forumPosts', posts)
      
      this.setData({
        post: {
          ...post,
          isFavorite: false
        }
      })
      
      wx.showToast({
        title: '已取消收藏',
        icon: 'success'
      })
    } else {
      // 未收藏，添加收藏
      const favoritePost = {
        id: post.id,
        title: post.title,
        category: post.category,
        time: new Date().toLocaleString()
      }
      
      favoritePosts.push(favoritePost)
      wx.setStorageSync('favoritePosts', favoritePosts)
      
      console.log('收藏成功，当前收藏列表:', favoritePosts)
      
      // 更新帖子状态
      let posts = wx.getStorageSync('forumPosts') || []
      posts = posts.map(p => {
        if (p.id === post.id) {
          p.isFavorite = true
        }
        return p
      })
      wx.setStorageSync('forumPosts', posts)
      
      this.setData({
        post: {
          ...post,
          isFavorite: true
        }
      })
      
      wx.showToast({
        title: '收藏成功',
        icon: 'success'
      })
    }
  },

  // 评论输入
  onCommentInput(e) {
    this.setData({ commentText: e.detail.value })
  },

  // 发表评论
  onSubmitComment() {
    const { commentText, comments, postId } = this.data
    
    if (!commentText.trim()) {
      wx.showToast({
        title: '请输入评论内容',
        icon: 'none'
      })
      return
    }
    
    // 获取用户信息
    const userInfo = userManager.getUserInfo()
    const userName = userInfo.nickname || '我'
    const userAvatar = userInfo.avatar || '/images/avatar-default.png'
    
    const newComment = {
      id: Date.now(),
      author: userName,
      avatar: userAvatar,
      content: commentText,
      time: '刚刚'
    }
    
    const newComments = [newComment, ...comments]
    
    // 保存评论
    this.saveComments(postId, newComments)
    
    // 同时将评论保存到帖子的commentList中
    let posts = wx.getStorageSync('forumPosts') || []
    posts = posts.map(p => {
      if (p.id === postId) {
        if (!p.commentList) {
          p.commentList = []
        }
        p.commentList.unshift(newComment)
      }
      return p
    })
    wx.setStorageSync('forumPosts', posts)
    
    this.setData({
      comments: newComments,
      commentText: ''
    })
    
    showSuccess('评论成功')
    
    console.log('评论已发布', {
      作者: userName,
      内容: commentText,
      帖子ID: postId
    })
  },

  // 预览图片
  onPreviewImage(e) {
    const { url, urls } = e.currentTarget.dataset
    wx.previewImage({
      current: url,      // 当前显示图片的链接
      urls: urls         // 需要预览的图片链接列表
    })
  },

  // 分享
  onShareAppMessage() {
    const { post } = this.data
    return {
      title: post.title,
      path: `/pages/forum-detail/forum-detail?id=${post.id}`
    }
  }
})