// pages/happy-school/happy-school.js - 快乐学堂页面
const api = require('../../utils/api')
const app = getApp()

Page({
  data: {
    statusBarHeight: 44,
    navBarHeight: 44,
    totalNavHeight: 88,
    loading: false,
    loadingMore: false,
    activeTab: 'featured',
    
    // 活动列表
    activityList: [],
    
    // 分页相关
    page: 1,
    limit: 20,
    hasMore: true,
    total: 0,

    // 二维码弹窗
    showQrcodeModal: false,
    qrcodeImageUrl: 'https://ai-c.maimanji.com/images/qrcode-happy-school.jpg'
  },

  onLoad() {
    const systemInfo = wx.getSystemInfoSync()
    const statusBarHeight = systemInfo.statusBarHeight || 44
    const menuButton = wx.getMenuButtonBoundingClientRect()
    const navBarHeight = menuButton.height + (menuButton.top - statusBarHeight) * 2
    const totalNavHeight = statusBarHeight + navBarHeight
    
    this.setData({
      statusBarHeight,
      navBarHeight,
      totalNavHeight
    })
    
    this.loadActivityList()
  },

  /**
   * 返回上一页
   */
  onBack() {
    wx.navigateBack()
  },

  /**
   * 切换活动标签
   */
  onTabChange(e) {
    const tab = e.currentTarget.dataset.tab
    if (tab === this.data.activeTab) return
    
    this.setData({ 
      activeTab: tab,
      activityList: [],
      page: 1,
      hasMore: true
    })
    this.loadActivityList()
  },

  /**
   * 下拉刷新
   */
  onPullDownRefresh() {
    this.loadActivityList(false).finally(() => {
      wx.stopPullDownRefresh()
    })
  },

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

  /**
   * 加载活动列表 - 根据categoryName筛选快乐学堂（支持分页）
   */
  async loadActivityList(isLoadMore = false) {
    if (isLoadMore) {
      this.setData({ loadingMore: true })
    } else {
      this.setData({ loading: true, page: 1, hasMore: true, activityList: [] })
    }
    
    try {
      const { activeTab, page, limit } = this.data
      const params = {
        category: 'school',
        limit: limit,
        page: page
      }

      if (activeTab === 'featured') {
        params.tab = 'featured'
      } else if (activeTab === 'free') {
        params.priceType = 'free'
      } else if (activeTab === 'vip') {
        params.is_vip = true
      } else if (activeTab === 'svip') {
        params.is_svip = true
      }

      const res = await api.activity.getList(params)
      
      if (res.success && res.data && res.data.list) {
        const total = res.data.total || 0
        const allActivities = res.data.list
        const schoolActivities = allActivities.filter(item => item.categoryName === '快乐学堂')

        let clubQrcode = ''
        const firstWithQrcode = schoolActivities.find(item => item.activityGuideQrcode || item.activity_guide_qrcode)
        if (firstWithQrcode && !isLoadMore) {
          clubQrcode = firstWithQrcode.activityGuideQrcode || firstWithQrcode.activity_guide_qrcode
        }

        const newActivityList = schoolActivities.map(item => {
          const heat = item.heat || (item.likes * 2 + (item.views || 0) + (item.current_participants || 0) * 3)
          
          return {
            id: item.id,
            title: item.title,
            date: this.formatDate(item.start_date || item.activityDate),
            location: item.location || '',
            venue: item.venue || '',
            image: item.coverImage || item.cover_image || '',
            heat: Math.floor(heat),
            price: item.price_text || item.priceText || '免费',
            priceType: item.is_free || item.priceType === 'free' ? 'free' : 'paid',
            likes: item.likes || item.likesCount || 0,
            participants: item.current_participants || item.currentParticipants || 0,
            isLiked: item.is_liked || item.isLiked || false,
            isSignedUp: item.is_registered || item.isSignedUp || false,
            status: item.status || (item.currentParticipants >= item.maxParticipants && item.maxParticipants > 0 ? 'full' : 'upcoming'),
            activityGuideQrcode: item.activityGuideQrcode || item.activity_guide_qrcode || ''
          }
        })
        
        const hasMore = newActivityList.length >= limit && (this.data.activityList.length + newActivityList.length) < total
        
        if (isLoadMore) {
          this.setData({
            activityList: [...this.data.activityList, ...newActivityList],
            loadingMore: false,
            hasMore,
            page: this.data.page + 1,
            total
          })
        } else {
          this.setData({ 
            activityList: newActivityList,
            hasMore,
            total,
            qrcodeImageUrl: clubQrcode || this.data.qrcodeImageUrl
          })
        }
        
        console.log('[happy-school] 加载成功，总数:', total, '当前:', this.data.activityList.length, 'hasMore:', hasMore)
      } else {
        if (isLoadMore) {
          this.setData({ loadingMore: false, hasMore: false })
        } else {
          this.setData({ activityList: [], hasMore: false })
        }
      }
    } catch (err) {
      console.error('加载活动列表失败', err)
      if (isLoadMore) {
        this.setData({ loadingMore: false })
      } else {
        this.setData({ activityList: [], loading: false })
      }
    } finally {
      if (!isLoadMore) {
        this.setData({ loading: false })
      }
    }
  },

  /**
   * 格式化日期
   */
  formatDate(dateStr) {
    if (!dateStr) return ''
    const date = new Date(dateStr)
    const year = date.getFullYear()
    const month = String(date.getMonth() + 1).padStart(2, '0')
    const day = String(date.getDate()).padStart(2, '0')
    return `${year}年${month}月${day}日`
  },

  /**
   * 活动卡片点击
   */
  onActivityTap(e) {
    const id = e.currentTarget.dataset.id
    wx.navigateTo({
      url: `/pages/activity-detail/activity-detail?id=${id}`
    })
  },

  /**
   * 点赞
   */
  async onLike(e) {
    const id = e.currentTarget.dataset.id
    const index = e.currentTarget.dataset.index
    
    if (!app.globalData.isLoggedIn) {
      wx.navigateTo({ url: '/pages/login/login' })
      return
    }
    
    try {
      const res = await api.activity.toggleLike(id)
      if (res.success) {
        this.setData({
          [`activityList[${index}].isLiked`]: res.data.isLiked,
          [`activityList[${index}].likes`]: res.data.likesCount
        })
      }
    } catch (err) {
      console.error('点赞失败', err)
      wx.showToast({ title: '操作失败', icon: 'none' })
    }
  },

  /**
   * 报名按钮点击
   */
  async onSignUp(e) {
    const id = e.currentTarget.dataset.id
    const index = e.currentTarget.dataset.index
    
    if (!app.globalData.isLoggedIn) {
      wx.navigateTo({ url: '/pages/login/login' })
      return
    }
    
    const activity = this.data.activityList[index]
    
    // 检查活动状态
    if (activity.status === 'full' || activity.status === 'ended') {
      const qrCode = activity.activityGuideQrcode || activity.activity_guide_qrcode || this.data.qrcodeImageUrl || 'https://ai-c.maimanji.com/api/common/qrcode?type=group'
      this.setData({ 
        qrcodeImageUrl: qrCode,
        showQrcodeModal: true 
      })
      return
    }

    try {
      if (activity.isSignedUp) {
        // 取消报名
        const res = await api.activity.cancelSignup(id)
        if (res.success) {
          wx.showToast({ title: '已取消报名', icon: 'success' })
          this.loadActivityList() // 刷新列表获取最新人数
        }
      } else {
        // 报名
        const res = await api.activity.signup(id)
        if (res.success) {
          wx.showToast({ title: '报名成功', icon: 'success' })
          this.loadActivityList() // 刷新列表获取最新人数
        } else {
          // 检查是否需要显示二维码（后端开关关闭或活动已结束）
          if (res.code === 'QR_CODE_REQUIRED' || res.error === 'QR_CODE_REQUIRED' || res.code === 'ACTIVITY_ENDED' || res.error === '活动已结束') {
            if (activity.activityGuideQrcode || activity.activity_guide_qrcode) {
              this.setData({ qrcodeImageUrl: activity.activityGuideQrcode || activity.activity_guide_qrcode })
            }
            this.setData({ showQrcodeModal: true })
            if (res.code === 'ACTIVITY_ENDED' || res.error === '活动已结束') {
              wx.showToast({ title: '活动已结束，进群查看更多', icon: 'none' })
            }
          } else {
            wx.showToast({ 
              title: res.error || '报名失败', 
              icon: 'none' 
            })
          }
        }
      }
    } catch (err) {
      console.error('报名操作失败', err)
      // 捕获特定错误码以显示二维码
      const isQrRequired = err && (err.code === 'QR_CODE_REQUIRED' || (err.data && err.data.code === 'QR_CODE_REQUIRED'))
      const isActivityEnded = err && (err.code === 'ACTIVITY_ENDED' || (err.data && err.data.code === 'ACTIVITY_ENDED') || err.error === '活动已结束')
      
      if (isQrRequired || isActivityEnded) {
        if (activity.activityGuideQrcode || activity.activity_guide_qrcode) {
          this.setData({ qrcodeImageUrl: activity.activityGuideQrcode || activity.activity_guide_qrcode })
        }
        this.setData({ showQrcodeModal: true })
        if (isActivityEnded) {
          wx.showToast({ title: '活动已结束，进群查看更多', icon: 'none' })
        }
      } else {
        wx.showToast({ 
          title: err.error || err.message || '操作失败', 
          icon: 'none' 
        })
      }
    }
  },

  /**
   * 加入群组
   */
  onJoinGroup() {
    // 如果没有二维码，尝试获取第一个活动的二维码
    if (!this.data.qrcodeImageUrl && this.data.activityList.length > 0) {
      const firstWithQrcode = this.data.activityList.find(item => item.activityGuideQrcode || item.activity_guide_qrcode)
      if (firstWithQrcode) {
        this.setData({ qrcodeImageUrl: firstWithQrcode.activityGuideQrcode || firstWithQrcode.activity_guide_qrcode })
      }
    }
    this.setData({ showQrcodeModal: true })
  },

  /**
   * 阻止冒泡
   */
  preventBubble() {
    return
  },

  /**
   * 关闭二维码弹窗
   */
  onCloseQrcodeModal() {
    this.setData({ showQrcodeModal: false })
  },

  /**
   * 保存二维码
   */
  async onSaveQrcode() {
    try {
      const { qrcodeImageUrl } = this.data
      
      // 下载图片到本地
      const downloadRes = await new Promise((resolve, reject) => {
        wx.downloadFile({
          url: qrcodeImageUrl,
          success: resolve,
          fail: reject
        })
      })
      
      if (downloadRes.statusCode !== 200) {
        throw new Error('下载失败')
      }
      
      // 保存到相册
      await new Promise((resolve, reject) => {
        wx.saveImageToPhotosAlbum({
          filePath: downloadRes.tempFilePath,
          success: resolve,
          fail: reject
        })
      })
      
      wx.showToast({ title: '保存成功', icon: 'success' })
      this.onCloseQrcodeModal()
    } catch (err) {
      console.error('保存二维码失败', err)
      
      if (err.errMsg && err.errMsg.includes('auth deny')) {
        wx.showModal({
          title: '需要授权',
          content: '请允许访问相册以保存二维码',
          confirmText: '去设置',
          success: (res) => {
            if (res.confirm) {
              wx.openSetting()
            }
          }
        })
      } else {
        wx.showToast({ title: '保存失败', icon: 'none' })
      }
    }
  }
})