import { lazy, Suspense } from 'react';
import { useNovuNotifications } from '@/hooks/useNovuNotifications';
import { useNovuTheme } from '@/hooks/useNovuTheme';
import { useNavigate } from 'react-router-dom';
import { Bell } from 'lucide-react';
import { Button } from '@/components/ui/button';

// Lazy load Novu Inbox to prevent React instance conflicts
const Inbox = lazy(() => 
  import('@novu/react').then(module => ({ default: module.Inbox }))
);

export function NotificationCenter() {
  const { applicationIdentifier, subscriberId, isEnabled } = useNovuNotifications();
  const appearance = useNovuTheme();
  const navigate = useNavigate();

  if (!isEnabled) {
    return null;
  }

  const handleNotificationClick = (notification: { data?: Record<string, unknown> }) => {
    // Handle navigation based on notification payload
    const data = notification.data as { url?: string } | undefined;
    if (data?.url) {
      navigate(data.url);
    }
  };

  return (
    <Suspense 
      fallback={
        <Button variant="ghost" size="icon" className="h-9 w-9" disabled>
          <Bell className="h-5 w-5" />
        </Button>
      }
    >
      <Inbox
        applicationIdentifier={applicationIdentifier}
        subscriber={subscriberId || ''}
        appearance={appearance}
        onNotificationClick={handleNotificationClick}
      />
    </Suspense>
  );
}
