/**
 * QueryClient Singleton
 * Action 4.6.1.5: Provide global access to QueryClient for state invalidation
 *
 * This singleton allows stateInvalidation to access QueryClient without
 * needing to be inside a React component.
 */

import type { QueryClient } from '@tanstack/react-query';

let queryClientInstance: QueryClient | null = null;

/**
 * Set the QueryClient instance
 * Should be called once in main.tsx after creating the QueryClient
 */
export function setQueryClient(client: QueryClient): void {
  queryClientInstance = client;
}

/**
 * Get the QueryClient instance
 * Returns null if not set (should not happen in production)
 */
export function getQueryClient(): QueryClient | null {
  return queryClientInstance;
}