const storage = require('../../utils/storage')
const util = require('../../utils/util')
const themeMod = require('../../utils/theme')
const iconsMod = require('../../utils/icons')

Page({
  data: {
    theme: { primary: '#FF6B35', primaryLight: '#FF8C5A', primaryBg: '#FFF3ED', primaryRgb: '255,107,53' },
    themeStyle: themeMod.BASE_VARS,
    totalDuration: 0,
    totalDurationText: '',
    totalSessions: 0,
    maxDuration: 0,
    maxDurationText: '',
    currentYear: new Date().getFullYear(),
    currentMonth: new Date().getMonth() + 1,
    monthRecords: [],
    historyList: [],
    showDayDetail: false,
    dayDetail: {},
    icons: iconsMod.build()
  },

  onLoad() {
    themeMod.applyThemeToPage(this)
    this._firstShow = true
  },

  onShow() {
    themeMod.applyThemeToPage(this)
    try {
      const tb = this.getTabBar()
      if (tb) tb.setData({ selected: 1 })
    } catch (e) {}
    if (this._firstShow) {
      this._firstShow = false
      this.refresh()
      return
    }
    this.refresh()
  },

  onPullDownRefresh() {
    this.refresh()
    wx.stopPullDownRefresh()
  },

  refresh() {
    storage.validateStreak()
    const stats = storage.getTotalStats()
    const monthKey = `${this.data.currentYear}-${String(this.data.currentMonth).padStart(2, '0')}`
    const records = storage.getRecordsByMonth(monthKey)

    // Each month is already sorted newest-first in storage. To get top 30 most recent,
    // walk months in reverse chrono order and concat — O(months*30) instead of O(n log n).
    const byMonth = storage.getRecords()
    const monthKeys = Object.keys(byMonth).sort().reverse()
    const historyList = []
    for (const mk of monthKeys) {
      for (const r of byMonth[mk]) {
        historyList.push(r)
        if (historyList.length >= 30) break
      }
      if (historyList.length >= 30) break
    }

    const theme = themeMod.getCurrentTheme()
    this.setData({
      theme,
      icons: iconsMod.build(theme),
      totalDuration: stats.totalDuration,
      totalDurationText: util.formatDuration(stats.totalDuration),
      totalSessions: stats.totalSessions,
      maxDuration: stats.maxDuration,
      maxDurationText: util.formatDuration(stats.maxDuration),
      monthRecords: records,
      historyList
    })
  },

  onPrevMonth() {
    let { currentYear, currentMonth } = this.data
    if (currentMonth === 1) {
      currentYear--
      currentMonth = 12
    } else {
      currentMonth--
    }
    this.setData({ currentYear, currentMonth })
    this.refresh()
  },

  onNextMonth() {
    let { currentYear, currentMonth } = this.data
    if (currentMonth === 12) {
      currentYear++
      currentMonth = 1
    } else {
      currentMonth++
    }
    this.setData({ currentYear, currentMonth })
    this.refresh()
  },

  onDayTap(e) {
    const { year, month, day } = e.detail
    const dateStr = `${year}-${String(month).padStart(2, '0')}-${String(day).padStart(2, '0')}`
    const allRecords = Object.values(storage.getRecords()).flat()
    const sessions = allRecords.filter(r => r.date === dateStr)
    const totalDur = sessions.reduce((sum, r) => sum + r.duration, 0)
    const calories = Math.round(totalDur * 0.068)
    this.setData({
      showDayDetail: true,
      dayDetail: {
        date: dateStr,
        sessions: sessions.length,
        duration: totalDur,
        durationText: util.formatDuration(totalDur),
        calories
      }
    })
  },

  onCloseDayDetail() {
    this.setData({ showDayDetail: false })
  },

  onLongPressDelete(e) {
    this.onDeleteRecord(e)
  },

  onDeleteRecord(e) {
    const id = e.currentTarget.dataset.id
    if (!id && id !== 0) {
      wx.showToast({ title: '记录数据异常', icon: 'none', duration: 1200 })
      return
    }
    wx.showModal({
      title: '删除记录',
      content: '确定要删除这条训练记录吗？',
      success: (res) => {
        if (res.confirm) {
          storage.deleteRecord(id)
          this.refresh()
          wx.showToast({ title: '已删除', icon: 'none', duration: 1200 })
        }
      }
    })
  }
})