interface CaptureStatus {
  running: boolean
  session_id?: number
  source?: string
  mode?: string
  pkts?: number
  bytes?: number
  last_session?: {
    id: number
    source: string
    mode: string
    status: string
    total_pkts: number
    total_bytes: number
    created_at: string
    ended_at?: string
  }
}

// Синглтон — один интервал на всё приложение
let interval: number | null = null
const status = ref<CaptureStatus>({ running: false })

export function useCaptureStatus() {
  const { get, post } = useApi()

  async function fetchStatus() {
    try {
      status.value = await get<CaptureStatus>('/capture/status')
    } catch {}
  }

  function startPolling() {
    if (interval || !import.meta.client) return
    fetchStatus()
    interval = window.setInterval(fetchStatus, 3000)
  }

  function stopPolling() {
    if (interval) {
      clearInterval(interval)
      interval = null
    }
  }

  async function stopCapture() {
    try {
      await post('/capture/stop')
      await fetchStatus()
    } catch {}
  }

  onMounted(startPolling)
  onUnmounted(() => {
    // Не останавливаем polling при размонтировании layout'а
  })

  return { status, fetchStatus, stopCapture, startPolling, stopPolling }
}