// pages/hospital/ranking.js
const app = getApp()

Page({
  data: {
    activeTab: 'overall',
    searchKeyword: '',
    selectedDepartment: '',
    rankingYear: '',
    rankingNote: '',
    departmentList: [],
    allHospitals: [],
    filteredHospitals: [],
    currentDepartmentRanking: {
      top10: [],
      nominated: []
    },
    hospitalRankingData: null,
    departmentRankingsData: null
  },

  onLoad(options) {
    this.loadData()
  },

  onShow() {
    if (!this.data.hospitalRankingData || !this.data.departmentRankingsData) {
      this.loadData()
    }
  },

  async loadData() {
    try {
      const appData = app.globalData

      let hospitalRanking = appData.hospitalRanking
      let departmentRankings = appData.departmentRankings

      if (!hospitalRanking) {
        hospitalRanking = await appData.hospitalRankingReady
      }
      if (!departmentRankings) {
        departmentRankings = await appData.departmentRankingsReady
      }

      this.setData({
        hospitalRankingData: hospitalRanking,
        departmentRankingsData: departmentRankings
      })

      this.processHospitalRanking(hospitalRanking)
      this.processDepartmentRankings(departmentRankings)
    } catch (err) {
      console.error('加载排行榜数据失败', err)
      wx.showToast({
        title: '数据加载失败',
        icon: 'none'
      })
    }
  },

  processHospitalRanking(data) {
    if (!data || !data.rankings) return

    const gradeClassMap = {
      'A+++++': 'grade-a5',
      'A++++': 'grade-a4',
      'A+++': 'grade-a3',
      'A++': 'grade-a2',
      'A+': 'grade-a1'
    }

    const hospitals = data.rankings.map(item => {
      const allDeps = (item.depart || [])
        .sort((a, b) => a.rank - b.rank)
      return {
        ...item,
        gradeClass: gradeClassMap[item.grade] || 'grade-a1',
        topDepartments: allDeps,
        expanded: false
      }
    })

    this.setData({
      rankingYear: data.year || '',
      rankingNote: data.note || '',
      allHospitals: hospitals,
      filteredHospitals: hospitals
    })
  },

  processDepartmentRankings(data) {
    if (!data || !data.departments) return

    const departments = Object.keys(data.departments)
    const firstDept = departments[0] || ''

    this.setData({
      departmentList: departments,
      selectedDepartment: firstDept
    })

    if (firstDept) {
      this.updateCurrentDepartmentRanking(firstDept)
    }
  },

  updateCurrentDepartmentRanking(deptName) {
    const data = this.data.departmentRankingsData
    if (!data || !data.departments || !data.departments[deptName]) {
      this.setData({
        currentDepartmentRanking: { top10: [], nominated: [] }
      })
      return
    }

    const deptData = data.departments[deptName]
    this.setData({
      currentDepartmentRanking: {
        top10: deptData.top10 || [],
        nominated: deptData.nominated || []
      }
    })
  },

  switchTab(e) {
    const tab = e.currentTarget.dataset.tab
    if (tab === this.data.activeTab) return
    this.setData({ activeTab: tab })
  },

  selectDepartment(e) {
    const dept = e.currentTarget.dataset.dept
    this.setData({ selectedDepartment: dept })
    this.updateCurrentDepartmentRanking(dept)
  },

  onSearchInput(e) {
    const keyword = e.detail.value
    this.setData({ searchKeyword: keyword })
    this.filterHospitals(keyword)
  },

  onSearch(e) {
    const keyword = e.detail.value
    this.filterHospitals(keyword)
  },

  clearSearch() {
    this.setData({ searchKeyword: '' })
    this.filterHospitals('')
  },

  filterHospitals(keyword) {
    let result = this.data.allHospitals

    if (keyword && keyword.trim()) {
      const lowerKeyword = keyword.trim().toLowerCase()
      result = result.filter(item => {
        const nameMatch = item.name && item.name.toLowerCase().includes(lowerKeyword)
        const deptMatch = item.depart && item.depart.some(d => d.name && d.name.toLowerCase().includes(lowerKeyword))
        return nameMatch || deptMatch
      })
    }

    this.setData({ filteredHospitals: result })
  },

  toggleHospital(e) {
    const name = e.currentTarget.dataset.name
    const hospitals = this.data.filteredHospitals.map(item => {
      if (item.name === name) {
        return { ...item, expanded: !item.expanded }
      }
      return item
    })
    this.setData({ filteredHospitals: hospitals })
  },

  onPullDownRefresh() {
    this.loadData().finally(() => {
      wx.stopPullDownRefresh()
    })
  },

  onShareAppMessage() {
    return {
      title: '复旦中国医院排行榜',
      path: '/pages/hospital/ranking'
    }
  }
})