const app = getApp()

Page({
  data: {
    statusBarHeight: 44,
    navBarHeight: 88,
    totalSections: 62,
    bookData: [],
    expandedPart: 'part-1',
    hasFullBook: false,
    purchasedSections: [],
    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' }
    ]
  },

  onLoad() {
    this.setNavBarHeight()
    this.loadChapters()
    this.syncUserStatus()
  },

  onShow() {
    if (typeof this.getTabBar === 'function' && this.getTabBar()) this.getTabBar().setData({ selected: 1 })
    this.setNavBarHeight()
    this.syncUserStatus()
  },

  setNavBarHeight() {
    const statusBarHeight = app.globalData.statusBarHeight || 44
    const navBarHeight = app.globalData.navBarHeight || (statusBarHeight + 44)
    this.setData({ statusBarHeight, navBarHeight })
  },

  loadChapters() {
    app.request('/api/book/all-chapters').then((res) => {
      if (res && res.data && Array.isArray(res.data)) {
        const bookData = this.normalizeBookData(res.data)
        const totalSections = res.totalSections || res.total || res.data.length || 62
        this.setData({ bookData, totalSections })
      } else if (res && res.chapters) {
        const bookData = this.normalizeBookData(res.chapters)
        this.setData({ bookData, totalSections: res.chapters.length || 62 })
      }
    }).catch(() => {})
  },

  normalizeBookData(list) {
    if (!Array.isArray(list) || list.length === 0) return []
    const partOrder = ['part-1', 'part-2', 'part-3', 'part-4', 'part-5']
    const partTitles = ['真实的人', '真实的行业', '真实的错误', '真实的赚钱', '真实的未来']
    const partMap = {}
    const subtitles = ['人性观察与社交逻辑', '社会运作的底层规则', '错过机会比失败更贵', '所有行业的杠杆结构', '人与系统的关系']
    partOrder.forEach((id, i) => {
      partMap[id] = {
        id,
        number: String(i + 1).padStart(2, '0'),
        title: partTitles[i] || ('篇' + (i + 1)),
        subtitle: subtitles[i] || '',
        chapters: []
      }
    })
    list.forEach((s) => {
      let partId = s.partId || s.part_id
      if (!partId && s.id) {
        const num = String(s.id).split('.')[0]
        partId = partOrder[parseInt(num, 10) - 1] || 'part-1'
      }
      partId = partId || 'part-1'
      if (!partMap[partId]) partMap[partId] = { id: partId, number: '99', title: '其他', subtitle: '', chapters: [] }
      const chId = s.chapterId || s.chapter_id || 'ch1'
      let ch = partMap[partId].chapters.find(c => c.id === chId)
      if (!ch) {
        ch = { id: chId, title: s.chapterTitle || s.chapter_title || '章节', sections: [] }
        partMap[partId].chapters.push(ch)
      }
      ch.sections.push({
        id: s.id,
        title: s.sectionTitle || s.title || s.section_title || '',
        isFree: !!s.isFree || !!s.is_free,
        price: s.price != null ? s.price : 1
      })
    })
    const out = partOrder.map(id => partMap[id]).filter(p => p.chapters.length > 0)
    out.forEach(p => {
      p.sectionCount = p.chapters.reduce((acc, ch) => acc + (ch.sections ? ch.sections.length : 0), 0)
    })
    if (out.length === 0) {
      const sections = list.map(s => ({ id: s.id, title: s.sectionTitle || s.title || s.section_title || '', isFree: !!s.isFree || !!s.is_free, price: s.price != null ? s.price : 1 }))
      const single = { id: 'part-1', number: '01', title: '全部', subtitle: '', sectionCount: sections.length, chapters: [{ id: 'ch1', title: '章节', sections }] }
      return [single]
    }
    return out
  },

  syncUserStatus() {
    const { hasFullBook, purchasedSections } = app.globalData
    this.setData({ hasFullBook: !!hasFullBook, purchasedSections: purchasedSections || [] })
  },

  hasPurchased(sectionId) {
    const { hasFullBook, purchasedSections } = app.globalData
    if (hasFullBook) return true
    return (purchasedSections || []).indexOf(sectionId) >= 0
  },

  togglePart(e) {
    const id = e.currentTarget.dataset.id
    const expandedPart = this.data.expandedPart === id ? '' : id
    this.setData({ expandedPart })
  },

  goToSearch() {
    wx.navigateTo({ url: '/pages/search/search' })
  },

  goToRead(e) {
    const id = e.currentTarget.dataset.id
    if (!id) return
    wx.navigateTo({ url: '/pages/read/read?id=' + encodeURIComponent(id) })
  },

  onPullDownRefresh() {
    this.loadChapters()
    this.syncUserStatus()
    wx.stopPullDownRefresh()
  }
})