'use client';

import { useAuth } from '@/lib/auth/AuthContext';

/**
 * Returns the effective driver ID for the current session.
 *
 * Prefers the authenticated user's primaryDriverId when available,
 * otherwise falls back to the demo default used across the alpha site.
 */
export function useEffectiveDriverId(): string {
  const { session } = useAuth();
  const user = session?.user as
    | {
        primaryDriverId?: string | null;
      }
    | undefined;

  return user?.primaryDriverId ?? 'driver-1';
}