import { ref } from 'vue'
import { useToast } from './useToast'
import { useAccounts } from './useAccounts'
import { useProducts } from './useProducts'

const App = window.go.main.App

const scheduleActive = ref(false)
const countdownSeconds = ref(0)
const countdownTimer = ref<number | null>(null)
const runState = ref('等待操作')

export function useScheduler() {
  const { showToast } = useToast()
  const { resetStatus, buildAccountProducts } = useAccounts()
  const { selectedProductId, selectedProductName } = useProducts()

  const setRunState = (text: string) => {
    runState.value = text || '等待操作'
  }

  const startNow = async () => {
    const ap = buildAccountProducts(selectedProductId.value || '')
    if (!ap) return

    resetStatus()
    setRunState('立即抢购已提交')
    showToast('抢购中', `${Object.keys(ap).length} 个账号正在抢购`, 'info', 3000)

    try {
      const d = await App.StartSeckill(ap)
      setRunState(d.msg || '已提交')
    } catch (e: any) {
      setRunState('提交失败')
      showToast('提交失败', e.message, 'error')
    }
  }

  const startSchedule = async (targetTime: string, advance: number) => {
    const ap = buildAccountProducts(selectedProductId.value || '')
    if (!ap) return

    if (!targetTime) {
      showToast('提示', '请选择目标时间', 'warn')
      return
    }

    // 格式化时间
    let timeStr = targetTime
    if (timeStr.split(':').length === 2) timeStr += ':00'

    const today = new Intl.DateTimeFormat('zh-CN', {
      year: 'numeric',
      month: '2-digit',
      day: '2-digit'
    }).format(new Date()).replace(/\//g, '-')

    const fullTime = today + ' ' + timeStr

    resetStatus()
    setRunState('定时配置中')

    try {
      const d = await App.SetSchedule({
        accountProducts: ap,
        targetTime: fullTime,
        advance
      })

      scheduleActive.value = true
      localStorage.setItem('targetTime', timeStr)
      localStorage.setItem('advance', String(advance))

      setRunState(`定时已开启，触发 ${d.triggerTime}`)
      showToast(
        '定时已开启',
        `触发时刻: ${d.triggerTime}<br>剩余时间: ${formatRemain(d.remainSecond)}`,
        'success',
        5000
      )
      startCountdown(d.remainSecond)
    } catch (e: any) {
      setRunState('定时设置失败')
      showToast('定时失败', e.message, 'error')
    }
  }

  const cancelSchedule = async () => {
    try {
      await App.CancelSchedule()
    } catch {}

    scheduleActive.value = false
    localStorage.removeItem('targetTime')
    localStorage.removeItem('advance')
    stopCountdown()
    setRunState('定时已停止')
    showToast('定时已停止', '抢购任务已取消', 'warn')
  }

  const startCountdown = (sec: number) => {
    stopCountdown()
    const endTime = Date.now() + sec * 1000

    countdownTimer.value = window.setInterval(() => {
      const remain = Math.max(0, Math.ceil((endTime - Date.now()) / 1000))
      countdownSeconds.value = remain

      if (remain <= 0) {
        scheduleActive.value = false
        setRunState('定时已触发')
        stopCountdown()
      }
    }, 500)
  }

  const stopCountdown = () => {
    if (countdownTimer.value) {
      clearInterval(countdownTimer.value)
      countdownTimer.value = null
    }
    countdownSeconds.value = 0
  }

  const formatRemain = (sec: number): string => {
    const h = Math.floor(sec / 3600)
    const m = Math.floor((sec % 3600) / 60)
    const s = sec % 60
    return `${h}:${String(m).padStart(2, '0')}:${String(s).padStart(2, '0')}`
  }

  const restoreSchedule = () => {
    const savedTime = localStorage.getItem('targetTime')
    const savedAdv = localStorage.getItem('advance')
    return { savedTime, savedAdv: savedAdv ? parseInt(savedAdv) : 300 }
  }

  return {
    scheduleActive,
    countdownSeconds,
    runState,
    setRunState,
    startNow,
    startSchedule,
    cancelSchedule,
    formatRemain,
    restoreSchedule
  }
}