import type { IHealthRecord, IRecordMeta } from '@/types/record'

const MONTH_KEEP = 12

function getMonthKey(timestamp: number) {
  const d = new Date(timestamp)
  return `health_${d.getFullYear()}-${String(d.getMonth() + 1).padStart(2, '0')}`
}

export function getDateStr(timestamp: number) {
  const d = new Date(timestamp)
  return d.toISOString().slice(0, 10)
}

export function getMonthStr(timestamp: number): string {
  const d = new Date(timestamp)
  const y = d.getFullYear()
  const m = String(d.getMonth() + 1).padStart(2, '0')
  return `${y}-${m}`
}

export function getTimeStr(timestamp: number) {
  const d = new Date(timestamp)
  return d.toTimeString().slice(0, 5)
}

function cleanOldMonths() {
  const cutoff = new Date()
  cutoff.setMonth(cutoff.getMonth() - MONTH_KEEP)
  const cutoffKey = `health_${cutoff.getFullYear()}-${String(cutoff.getMonth() + 1).padStart(2, '0')}`
  const keys = wx.getStorageInfoSync().keys
  keys.forEach((key) => {
    if (key.startsWith('health_') && key < cutoffKey) {
      wx.removeStorageSync(key)
    }
  })
}

function addRecord(type: string, data: Record<string, any>, timestamp: number) {
  const key = getMonthKey(timestamp)
  const all = wx.getStorageSync(key) || {}
  const date = getDateStr(timestamp)

  if (!all[date])
    all[date] = []

  all[date].push({
    id: Date.now() + Math.random().toString(36).slice(2, 6),
    time: getTimeStr(timestamp),
    type,
    ...data,
  })

  wx.setStorageSync(key, all)
}

export function addWeight(value: number, note: string, timestamp: number) {
  addRecord('weight', { value, note }, timestamp)
}

export function addSleep(startTime: number, endTime: number, duration: number, note: string, timestamp: number) {
  addRecord('sleep', { startTime, endTime, duration, note }, timestamp)
}

export function addSport(category: string, duration: number, note: string, timestamp: number) {
  addRecord('sport', { category, duration, note }, timestamp)
}

export function addBloodPressure(systolic: number, diastolic: number, heartRate: number, note: string, timestamp: number) {
  addRecord('bloodPressure', { systolic, diastolic, heartRate, note }, timestamp)
}

export function addBloodSugar(value: number, period: string, note: string, timestamp: number) {
  addRecord('bloodSugar', { value, period, note }, timestamp)
}

export function addTemperature(value: number, location: string, note: string, timestamp: number) {
  addRecord('temperature', { value, location, note }, timestamp)
}

function getAllMonthKeys(): string[] {
  return wx.getStorageInfoSync().keys.filter(k => k.startsWith('health_')).sort()
}

// ─── 根据时间戳反推它属于哪个月的 key ───
function getMonthKeyForTimestamp(timestamp: number): string {
  const d = new Date(timestamp)
  return `health_${d.getFullYear()}-${String(d.getMonth() + 1).padStart(2, '0')}`
}

// ─── 根据 "YYYY-MM-DD" 反推月份 key ───
function getMonthKeyForDate(dateStr: string): string {
  const [y, m] = dateStr.split('-')
  return `health_${y}-${m}`
}

export function getDayRecords(date: string): IHealthRecord[] {
  const key = getMonthKeyForDate(date)
  const all = wx.getStorageSync(key) || {}
  const dayRecords = all[date] || []
  return [...dayRecords].sort((a, b) => a.time.localeCompare(b.time))
}

export function getMonthRecords(yearMonth: string, type?: string): IHealthRecord[] {
  const key = `health_${yearMonth}`
  const all = wx.getStorageSync(key) || {}

  const result: IHealthRecord[] = []
  Object.keys(all).forEach((date) => {
    all[date].forEach((r: IHealthRecord) => {
      if (!type || r.type === type) {
        result.push({ date, ...r })
      }
    })
  })

  return sortRecords(result)
}

// 排序：先按 date 正序，再按 time 正序
function sortRecords(records: IHealthRecord[]): IHealthRecord[] {
  return records.sort((a, b) => {
    const dateCmp = a.date.localeCompare(b.date)
    if (dateCmp !== 0)
      return dateCmp
    return a.time.localeCompare(b.time)
  })
}

const META_MAP: Record<string, IRecordMeta> = {
  weight: { icon: '⚖️', label: '体重', color: 'bg-[#E89E3A]' },
  sleep: { icon: '😴', label: '睡眠', color: 'bg-[#2E5B8C]' },
  bloodPressure: { icon: '❤️', label: '血压', color: 'bg-[#C04A3C]' },
  bloodSugar: { icon: '📈', label: '血糖', color: 'bg-[#9C27B0]' },
  sport: { icon: '🏃', label: '运动', color: 'bg-[#3A7C5B]' },
  temperature: { icon: '🌡️', label: '体温', color: 'bg-[#D32F2F]' },
}

export function getRecordMeta(type: string): IRecordMeta {
  return META_MAP[type] || { icon: '📋', label: '其他', color: 'bg-gray-400' }
}

export function getRecordValue(record: IHealthRecord): string {
  switch (record.type) {
    case 'weight':
      return `${record.value} kg`
    case 'bloodPressure':
      return `${record.systolic}/${record.diastolic} mmHg${record.heartRate ? ` · 心率 ${record.heartRate}` : ''}`
    case 'bloodSugar':
      return `${record.value} mmol/L · ${record.period}`
    case 'heartRate':
      return `${record.value} bpm`
    case 'temperature':
      return `${record.value} ℃${record.location ? ` · ${record.location}` : ''}`
    case 'sport':
      return `${record.category} · ${record.duration}min`
    case 'sleep':
      return `${new Date(record.startTime).toTimeString().slice(0, 5)} ~ ${new Date(record.endTime).toTimeString().slice(0, 5)}（${record.duration}h）`
    default:
      return ''
  }
}

export function getRecordStatus(record: IHealthRecord): string {
  switch (record.type) {
    case 'bloodPressure':
      if (record.systolic >= 140 || record.diastolic >= 90)
        return '偏高'
      if (record.systolic < 90 || record.diastolic < 60)
        return '偏低'
      return '正常'

    case 'bloodSugar':
      if (record.period.includes('空腹')) {
        return record.value >= 6.1 ? '偏高' : '正常'
      }
      // 餐后
      return record.value >= 7.8 ? '偏高' : '正常'

    case 'heartRate':
      if (record.value < 60)
        return '偏慢'
      if (record.value <= 100)
        return '正常'
      return '偏快'

    case 'temperature':
      if (record.value < 36.1)
        return '偏低'
      if (record.value <= 37.2)
        return '正常'
      return '偏高'

    case 'sport':
      return record.duration >= 30 ? '达标' : '偏少'

    case 'sleep':
      if (record.duration >= 7)
        return '充足'
      if (record.duration >= 6)
        return '良好'
      return '不足'

    default:
      return '未知'
  }
}

const WEEKDAY = ['日', '一', '二', '三', '四', '五', '六']

export function groupByDate(records: IHealthRecord[]): Array<{
  date: string
  weekday: string
  items: IHealthRecord[]
}> {
  const map: Record<string, IHealthRecord[]> = {}
  records.forEach((r) => {
    if (!r.date)
      return
    if (!map[r.date])
      map[r.date] = []
    map[r.date].push(r)
  })
  return Object.keys(map)
    .sort((a, b) => b.localeCompare(a)) // 日期倒序，最新的在上
    .map(date => ({
      date,
      weekday: WEEKDAY[new Date(date).getDay()],
      items: map[date].sort((a, b) => a.time.localeCompare(b.time)), // 当天按时间正序
    }))
}