// composables/useFlash.js
export function useFlash() {
  // 全局可复用状态（跨页面不丢）
  const state = useState('flash:state', () => ({
    show: false,
    text: '',
    type: 'info', // info | success | error | warning
  }))
  const hideTimer = useState('flash:timer', () => null)

  function open(text, type = 'info', ms = 3000) {
    // 允许字符串或对象
    if (typeof text === 'object' && text) {
      state.value = {
        show: true,
        text: text.text ?? '',
        type: text.type ?? 'info',
      }
      ms = text.ms ?? ms
    } else {
      state.value = { show: true, text: String(text ?? ''), type }
    }
    if (hideTimer.value) clearTimeout(hideTimer.value)
    hideTimer.value = setTimeout(() => {
      state.value.show = false
      hideTimer.value = null
    }, Math.max(0, ms))
  }

  function close() {
    if (hideTimer.value) {
      clearTimeout(hideTimer.value)
      hideTimer.value = null
    }
    state.value.show = false
  }

  return {
    state,
    open,
    close,
  }
}