import { useState, useEffect, useRef, useCallback } from "react"

/**
 * 倒计时 Hook
 * 用于验证码发送等场景的倒计时控制
 */
export const useCountdown = (initialSeconds = 60) => {
  const [countdown, setCountdown] = useState(0)
  const timerRef = useRef<ReturnType<typeof setInterval> | null>(null)

  useEffect(() => {
    if (countdown > 0) {
      timerRef.current = setInterval(() => {
        setCountdown((prev) => prev - 1)
      }, 1000)
    } else if (timerRef.current) {
      clearInterval(timerRef.current)
      timerRef.current = null
    }
    return () => {
      if (timerRef.current) clearInterval(timerRef.current)
    }
  }, [countdown])

  const start = useCallback(() => {
    setCountdown(initialSeconds)
  }, [initialSeconds])

  const reset = useCallback(() => {
    setCountdown(0)
  }, [])

  return {
    countdown,
    isRunning: countdown > 0,
    start,
    reset,
  }
}