import { useSession } from 'next-auth/react';
import { useCallback, useRef } from 'react';

/**
 * Hook to trigger immediate notification refresh
 * Use this when widgets detect new messages/emails
 */
export function useTriggerNotification() {
  const { data: session } = useSession();
  const lastTriggerRef = useRef<number>(0);
  const TRIGGER_DEBOUNCE_MS = 2000; // 2 seconds debounce

  const triggerNotificationRefresh = useCallback(async () => {
    if (!session?.user?.id) return;
    
    // Debounce: prevent multiple triggers within 2 seconds
    const now = Date.now();
    if (now - lastTriggerRef.current < TRIGGER_DEBOUNCE_MS) {
      console.log('[useTriggerNotification] Debouncing trigger (too soon)');
      return;
    }
    lastTriggerRef.current = now;
    
    try {
      console.log('[useTriggerNotification] Triggering notification refresh');
      
      // Dispatch custom event for immediate UI update
      window.dispatchEvent(new CustomEvent('trigger-notification-refresh'));
      
      // Force refresh du notification count en invalidant le cache
      const response = await fetch(`/api/notifications/count?_t=${Date.now()}&force=true`, {
        method: 'GET',
        credentials: 'include',
        cache: 'no-store',
        headers: {
          'Cache-Control': 'no-cache',
        }
      });
      
      if (response.ok) {
        console.log('[useTriggerNotification] Notification refresh triggered successfully');
      } else {
        console.warn('[useTriggerNotification] Failed to trigger refresh:', response.status);
      }
    } catch (error) {
      console.error('[useTriggerNotification] Error triggering notification refresh:', error);
    }
  }, [session?.user?.id]);
  
  return { triggerNotificationRefresh };
}