Todo/hooks/useRealtimeSync.ts

'use client'

import { useEffect, useRef, useCallback } from 'react'
import { useRouter } from 'next/navigation'

interface UseRealtimeSyncOptions {
  listId?: string
  enabled?: boolean
  pollInterval?: number
  onUpdate?: () => void
}

/**
 * Hook to enable real-time synchronization of list data
 * Polls the server for updates by refreshing the route
 */
export function useRealtimeSync({
  listId,
  enabled = true,
  pollInterval = 3000, // Poll every 3 seconds
  onUpdate
}: UseRealtimeSyncOptions) {
  const router = useRouter()
  const intervalRef = useRef<NodeJS.Timeout | null>(null)

  const refresh = useCallback(() => {
    console.log('[RealtimeSync] Refreshing...', listId ? `list ${listId}` : 'page')
    router.refresh()
    if (onUpdate) {
      onUpdate()
    }
  }, [router, onUpdate, listId])

  useEffect(() => {
    if (!enabled) {
      if (intervalRef.current) {
        clearInterval(intervalRef.current)
        intervalRef.current = null
      }
      return
    }

    // Start polling
    intervalRef.current = setInterval(refresh, pollInterval)

    // Cleanup on unmount
    return () => {
      if (intervalRef.current) {
        clearInterval(intervalRef.current)
        intervalRef.current = null
      }
    }
  }, [enabled, pollInterval, refresh])

  // Also refresh when the page becomes visible again
  useEffect(() => {
    const handleVisibilityChange = () => {
      if (document.visibilityState === 'visible' && enabled) {
        refresh()
      }
    }

    document.addEventListener('visibilitychange', handleVisibilityChange)
    return () => {
      document.removeEventListener('visibilitychange', handleVisibilityChange)
    }
  }, [enabled, refresh])

  return {
    refresh,
  }
}