// index.js
const storage = require('../../utils/storage')
const dateUtils = require('../../utils/date')

Page({
  data: {
    persons: [],
    originalPersons: [], // 原始数据备份
    searchKeyword: '',
    currentFilter: 'all'
  },

  onLoad() {
    this.loadPersons()
  },

  onShow() {
    // 每次显示页面时刷新数据
    this.loadPersons()
  },

  /**
   * 加载人员列表
   */
  loadPersons() {
    const persons = storage.getPersons()
    const anniversaries = storage.getAnniversaries()
    
    // 为每个人员添加纪念日信息
    const personsWithAnniversaries = persons.map(person => {
      const personAnniversaries = anniversaries.filter(a => a.personId === person.id)
      
      // 找到最近的纪念日
      let nextAnniversary = null
      if (personAnniversaries.length > 0) {
        const today = new Date()
        const upcoming = personAnniversaries
          .map(a => {
            // 如果是农历，需要特殊处理
            const date = new Date(a.solarYear, a.solarMonth - 1, a.solarDay)
            return {
              ...a,
              date,
              daysUntil: dateUtils.getDaysUntil(date)
            }
          })
          .filter(a => a.daysUntil >= 0)
          .sort((a, b) => a.daysUntil - b.daysUntil)
        
        if (upcoming.length > 0) {
          const next = upcoming[0]
          nextAnniversary = {
            type: next.type,
            dateText: dateUtils.formatDate(next.date, 'MM月DD日'),
            daysUntil: next.daysUntil,
            daysUntilText: this.formatDaysUntil(next.daysUntil)
          }
        }
      }

      return {
        ...person,
        anniversaryCount: personAnniversaries.length,
        nextAnniversary
      }
    })

    // 按最近的纪念日排序
    const sorted = personsWithAnniversaries.sort((a, b) => {
      if (!a.nextAnniversary && !b.nextAnniversary) return 0
      if (!a.nextAnniversary) return 1
      if (!b.nextAnniversary) return -1
      return a.nextAnniversary.daysUntil - b.nextAnniversary.daysUntil
    })

    this.setData({
      persons: sorted,
      originalPersons: sorted
    })
  },

  /**
   * 格式化剩余天数
   */
  formatDaysUntil(days) {
    if (days === 0) return '今天'
    if (days === 1) return '明天'
    if (days < 7) return `${days}天后`
    if (days < 30) return `还有${Math.floor(days / 7)}周`
    return `还有${Math.floor(days / 30)}个月`
  },

  /**
   * 搜索输入
   */
  onSearchInput(e) {
    const keyword = e.detail.value
    this.setData({ searchKeyword: keyword })
    this.filterPersons()
  },

  /**
   * 筛选切换
   */
  onFilterTap(e) {
    const filter = e.currentTarget.dataset.filter
    this.setData({ currentFilter: filter })
    this.filterPersons()
  },

  /**
   * 筛选人员
   */
  filterPersons() {
    const { originalPersons, searchKeyword, currentFilter } = this.data
    
    let filtered = [...originalPersons]

    // 关键词搜索
    if (searchKeyword) {
      filtered = filtered.filter(p => 
        p.name.includes(searchKeyword) || 
        (p.nickname && p.nickname.includes(searchKeyword))
      )
    }

    // 类型筛选（暂时保留，后续可以实现更精确的筛选）
    // if (currentFilter !== 'all') {
    //   // 可以实现更精确的筛选逻辑
    // }

    this.setData({ persons: filtered })
  },

  /**
   * 点击人员
   */
  onPersonTap(e) {
    const id = e.currentTarget.dataset.id
    wx.navigateTo({
      url: `/pages/person-detail/person-detail?id=${id}`
    })
  },

  /**
   * 点击添加按钮
   */
  onAddTap() {
    wx.showActionSheet({
      itemList: ['添加人员', '添加纪念日'],
      success: (res) => {
        if (res.tapIndex === 0) {
          wx.navigateTo({
            url: '/pages/add-person/add-person'
          })
        } else if (res.tapIndex === 1) {
          wx.navigateTo({
            url: '/pages/add-anniversary/add-anniversary'
          })
        }
      }
    })
  }
})