const { resolveScene } = require('../../../../utils/static-ux/shared')
const { ROUTES, openStaticRoute } = require('../../../../utils/static-ux/route-map')

const BOOK_DETAIL_SURFACES = Object.freeze({
  'classic-a': {
    coverText: '黄',
    title: '黄帝内经素问',
    subtitle: '传世中医典籍 · 学习阅读入口',
    tags: ['经典', '入门'],
    description: '当前典籍详情页只保留封面、简介、目录和推荐区块，不迁移旧项目的详情接口。',
    progressText: '已读到：上古天真论',
    primaryRoute: `${ROUTES.tcm.section}?scene=reader-a`,
    catalog: [
      {
        key: 'chapter-1',
        title: '上古天真论',
        route: `${ROUTES.tcm.section}?scene=reader-a`,
        children: ['节录一', '节录二']
      },
      {
        key: 'chapter-2',
        title: '四气调神大论',
        route: `${ROUTES.tcm.section}?scene=reader-a`,
        children: ['节录一', '节录二']
      }
    ],
    recommends: [
      {
        key: 'recommend-b',
        title: '伤寒论',
        route: `${ROUTES.tcm.bookDetail}?scene=classic-b`
      }
    ]
  },
  'classic-b': {
    coverText: '伤',
    title: '伤寒论',
    subtitle: '经方经典 · 学习阅读入口',
    tags: ['经方', '进阶'],
    description: '静态详情页保留目录结构和推荐卡片，为后续新数据层留出清晰接口边界。',
    progressText: '已读到：太阳病篇',
    primaryRoute: `${ROUTES.tcm.section}?scene=reader-b`,
    catalog: [
      {
        key: 'chapter-1',
        title: '太阳病篇',
        route: `${ROUTES.tcm.section}?scene=reader-b`,
        children: ['条文一', '条文二']
      },
      {
        key: 'chapter-2',
        title: '阳明病篇',
        route: `${ROUTES.tcm.section}?scene=reader-b`,
        children: ['条文一', '条文二']
      }
    ],
    recommends: [
      {
        key: 'recommend-a',
        title: '黄帝内经素问',
        route: `${ROUTES.tcm.bookDetail}?scene=classic-a`
      }
    ]
  }
})

function cloneCatalog(items) {
  return items.map(item => ({
    ...item,
    children: [...item.children]
  }))
}

function cloneItems(items) {
  return items.map(item => ({ ...item }))
}

function createTcmBookDetailPageData(rawScene) {
  const scene = resolveScene(rawScene, ['classic-a', 'classic-b'], 'classic-a')
  const surface = BOOK_DETAIL_SURFACES[scene]

  return {
    title: '典籍详情',
    scene,
    coverText: surface.coverText,
    book: {
      title: surface.title,
      subtitle: surface.subtitle
    },
    tags: [...surface.tags],
    description: surface.description,
    progressText: surface.progressText,
    primaryRoute: surface.primaryRoute,
    catalog: cloneCatalog(surface.catalog),
    recommends: cloneItems(surface.recommends)
  }
}

function showNavigate(route) {
  openStaticRoute(route, wx)
}

Page({
  data: createTcmBookDetailPageData('classic-a'),

  onLoad(options) {
    this.setData(createTcmBookDetailPageData(options.scene))
  },

  handlePrimaryTap() {
    showNavigate(this.data.primaryRoute)
  },

  handleCatalogTap(event) {
    showNavigate(event.currentTarget.dataset.route)
  },

  handleRecommendTap(event) {
    showNavigate(event.currentTarget.dataset.route)
  }
})

module.exports = {
  createTcmBookDetailPageData
}