// hooks/useEmailCountdown.ts
import { ref, computed, onUnmounted } from 'vue'
import { useI18n } from 'vue-i18n'
import ls from "@/utils/store2";
interface UseEmailCountdownOptions {
  duration?: number
  storageKey?: string
}

export function useEmailCountdown(options: UseEmailCountdownOptions) {
  const { t } = useI18n()
  const {
    duration = 60,
    storageKey = 'email_countdown'
  } = options || {}

  const time = ref<number>(duration)
  const endTime = ref<number>(0)
  let timer: ReturnType<typeof setInterval> | null = null
  const text = computed(() => {
    if (time.value === duration) {
      return t('newSignup.item11')
    }
    return `${t('signup.form.waitCode1')}${time.value}${t('signup.form.waitCode2')}`
  })
  const canSend = computed(() => time.value === duration)
  const tick = () => {
    const remain = Math.floor((endTime.value - Date.now()) / 1000)
    time.value = remain > 0 ? remain : duration;
    if (time.value === duration) {
      clear()
    }
  }
  const start = () => {
    clear()
    endTime.value = Date.now() + duration * 1000
    ls.set(storageKey, String(endTime.value))
    tick()
    timer = setInterval(tick, 1000)
  }
  const restore = () => {
    const saved = Number(ls.get(storageKey))
    if (!saved) return

    if (saved > Date.now()) {
      endTime.value = saved
      tick()
      timer = setInterval(tick, 1000)
    }
  }
  const clear = () => {
    if (timer) {
      clearInterval(timer)
      timer = null
      // time.value = duration
    }
    ls.set(storageKey, '')
  }

  onUnmounted(clear)

  return {
    time,
    text,
    canSend,
    start,
    restore,
    clear
  }
}