/**
 * Soul创业派对 - 目录页
 * 开发: 卡若
 * 技术支持: 存客宝
 * 数据: 完整真实文章标题
 */

const app = getApp()
const { trackClick } = require('../../utils/trackClick')

Page({
  data: {
    // 系统信息
    statusBarHeight: 44,
    navBarHeight: 88,
    
    // 用户状态
    isLoggedIn: false,
    hasFullBook: false,
    isVip: false,
    purchasedSections: [],
    
    // 懒加载：篇章列表（不含章节详情），展开时再请求 chapters-by-part
    totalSections: 0,
    bookData: [],
    
    // 展开状态
    expandedPart: null,
    
    // 已加载的篇章章节缓存 { partId: chapters }
    _loadedChapters: {},
    
    // 固定模块 id -> mid（序言/尾声/附录，供 goToRead 传 mid）
    fixedSectionsMap: {},
    
    // 附录
    appendixList: [
      { id: 'appendix-1', title: '附录1｜Soul派对房精选对话' },
      { id: 'appendix-2', title: '附录2｜创业者自检清单' },
      { id: 'appendix-3', title: '附录3｜本书提到的工具和资源' }
    ],

    // book/parts 加载中
    partsLoading: true,

    // 功能配置（搜索开关）
    searchEnabled: true
  },

  onLoad() {
    wx.showShareMenu({ withShareTimeline: true })
    this.setData({
      statusBarHeight: app.globalData.statusBarHeight,
      navBarHeight: app.globalData.navBarHeight
    })
    this.updateUserStatus()
    this.loadVipStatus()
    this.loadParts()
    this.loadFeatureConfig()
  },

  async loadFeatureConfig() {
    try {
      if (app.globalData.features && typeof app.globalData.features.searchEnabled === 'boolean') {
        this.setData({ searchEnabled: app.globalData.features.searchEnabled })
        return
      }
      const res = await app.getConfig()
      const features = (res && res.features) || {}
      const searchEnabled = features.searchEnabled !== false
      if (!app.globalData.features) app.globalData.features = {}
      app.globalData.features.searchEnabled = searchEnabled
      this.setData({ searchEnabled })
    } catch (e) {
      this.setData({ searchEnabled: true })
    }
  },

  // 懒加载：仅拉取篇章列表 + totalSections + fixedSections（book/parts，不再用 all-chapters）
  async loadParts() {
    this.setData({ partsLoading: true })
    try {
      const res = await app.request({ url: '/api/miniprogram/book/parts', silent: true })
      let parts = []
      let totalSections = 0
      let fixedSections = []
      if (res?.success && Array.isArray(res.parts) && res.parts.length > 0) {
        parts = res.parts
        totalSections = res.totalSections ?? 0
        fixedSections = res.fixedSections || []
      }
      const numbers = ['一', '二', '三', '四', '五', '六', '七', '八', '九', '十', '十一', '十二']
      const fixedMap = {}
      fixedSections.forEach(f => { fixedMap[f.id] = f.mid })
      const appendixList = [
        { id: 'appendix-1', title: '附录1｜Soul派对房精选对话', mid: fixedMap['appendix-1'] },
        { id: 'appendix-2', title: '附录2｜创业者自检清单', mid: fixedMap['appendix-2'] },
        { id: 'appendix-3', title: '附录3｜本书提到的工具和资源', mid: fixedMap['appendix-3'] }
      ]
      const bookData = parts.map((p, idx) => ({
        id: p.id,
        number: numbers[idx] || String(idx + 1),
        title: p.title,
        subtitle: p.subtitle || '',
        chapterCount: p.chapterCount || 0,
        chapters: [] // 展开时懒加载
      }))
      app.globalData.totalSections = totalSections
      this.setData({
        bookData,
        totalSections,
        fixedSectionsMap: fixedMap,
        appendixList,
        _loadedChapters: {},
        partsLoading: false
      })
    } catch (e) {
      console.log('[Chapters] 加载篇章失败:', e)
      this.setData({ bookData: [], totalSections: 0, partsLoading: false })
    }
  },

  // 展开时懒加载该篇章的章节（含 mid，供阅读页 by-mid 请求）
  async loadChaptersByPart(partId) {
    if (this.data._loadedChapters[partId]) return
    try {
      const res = await app.request({
        url: `/api/miniprogram/book/chapters-by-part?partId=${encodeURIComponent(partId)}`,
        silent: true
      })
      const rows = (res && res.data) || []
      const chMap = new Map()
      rows.forEach(r => {
        const cid = r.chapterId || r.chapter_id || 'chapter-1'
        if (!chMap.has(cid)) {
          chMap.set(cid, {
            id: cid,
            title: r.chapterTitle || r.chapter_title || '未分类',
            sections: []
          })
        }
        const ch = chMap.get(cid)
        const isPremium = r.editionPremium === true || r.edition_premium === true || r.edition_premium === 1 || r.edition_premium === '1'
        ch.sections.push({
          id: r.id,
          mid: r.mid ?? r.MID ?? 0,
          title: r.sectionTitle || r.section_title || r.title || '',
          isFree: r.isFree === true || (r.price !== undefined && r.price === 0),
          price: r.price ?? 1,
          isNew: r.isNew === true || r.is_new === true,
          isPremium
        })
      })
      const chapters = Array.from(chMap.values())
      const loaded = { ...this.data._loadedChapters, [partId]: chapters }
      const bookData = this.data.bookData.map(p =>
        p.id === partId ? { ...p, chapters } : p
      )
      const bookDataFlat = app.globalData.bookData || []
      rows.forEach(r => {
        const idx = bookDataFlat.findIndex(c => c.id === r.id)
        if (idx >= 0) bookDataFlat[idx] = { ...bookDataFlat[idx], ...r }
        else bookDataFlat.push(r)
      })
      app.globalData.bookData = bookDataFlat
      wx.setStorage({ key: 'bookData', data: bookDataFlat }) // 异步写入，避免阻塞主线程
      this.setData({ bookData, _loadedChapters: loaded })
    } catch (e) {
      console.log('[Chapters] 加载章节失败:', e)
    }
  },

  onPullDownRefresh() {
    this.loadParts()
      .then(() => wx.stopPullDownRefresh())
      .catch(() => wx.stopPullDownRefresh())
  },

  onShow() {
    // 设置TabBar选中状态
    if (typeof this.getTabBar === 'function' && this.getTabBar()) {
      const tabBar = this.getTabBar()
      if (tabBar.updateSelected) {
        tabBar.updateSelected()
      } else {
        tabBar.setData({ selected: 1 })
      }
    }
    this.updateUserStatus()
    this.loadVipStatus()
  },

  // 拉取 VIP 状态（isVip=会员，hasFullBook=9.9 买断）
  async loadVipStatus() {
    const userId = app.globalData.userInfo?.id
    if (!userId) return
    try {
      const res = await app.request({ url: `/api/miniprogram/vip/status?userId=${userId}`, silent: true, timeout: 3000 })
      if (res?.success) {
        app.globalData.isVip = !!res.data?.isVip
        app.globalData.vipExpireDate = res.data?.expireDate || ''
        this.setData({ isVip: app.globalData.isVip })
        const userInfo = app.globalData.userInfo || {}
        userInfo.isVip = app.globalData.isVip
        userInfo.vipExpireDate = app.globalData.vipExpireDate
        wx.setStorageSync('userInfo', userInfo)
      }
    } catch (e) {
      // 静默失败不影响目录展示
    }
  },

  // 更新用户状态
  updateUserStatus() {
    const { isLoggedIn, hasFullBook, purchasedSections, isVip } = app.globalData
    this.setData({ isLoggedIn, hasFullBook, purchasedSections, isVip })
  },

  // 切换展开状态，展开时懒加载该篇章章节
  async togglePart(e) {
    trackClick('chapters', 'tab_click', e.currentTarget.dataset.id || '篇章')
    const partId = e.currentTarget.dataset.id
    const isExpanding = this.data.expandedPart !== partId
    this.setData({
      expandedPart: isExpanding ? partId : null
    })
    if (isExpanding) await this.loadChaptersByPart(partId)
  },

  // 跳转到阅读页（优先传 mid，与分享逻辑一致）
  goToRead(e) {
    const id = e.currentTarget.dataset.id
    const mid = e.currentTarget.dataset.mid
    trackClick('chapters', 'card_click', id || '章节')
    const q = mid ? `mid=${mid}` : `id=${id}`
    wx.navigateTo({ url: `/pages/read/read?${q}` })
  },

  // 检查是否已购买
  hasPurchased(sectionId, isPremium) {
    if (this.data.isVip) return true
    if (!isPremium && this.data.hasFullBook) return true
    return this.data.purchasedSections.includes(sectionId)
  },

  // 返回首页
  goBack() {
    wx.switchTab({ url: '/pages/index/index' })
  },

  // 跳转到搜索页
  goToSearch() {
    if (!this.data.searchEnabled) return
    trackClick('chapters', 'nav_click', '搜索')
    wx.navigateTo({ url: '/pages/search/search' })
  },

  onShareAppMessage() {
    const ref = app.getMyReferralCode()
    return {
      title: 'Soul创业派对 - 目录',
      path: ref ? `/pages/chapters/chapters?ref=${ref}` : '/pages/chapters/chapters'
    }
  },

  onShareTimeline() {
    const ref = app.getMyReferralCode()
    return { title: 'Soul创业派对 - 真实商业故事', query: ref ? `ref=${ref}` : '' }
  }
})