/**
 * 代理服务器
 */
declare class ProxyServer {
    private app;
    private httpServer;
    private wss;
    private clients;
    private pendingRequests;
    private heartbeatTimer?;
    constructor();
    /**
     * 设置HTTP路由
     */
    private setupRoutes;
    /**
     * 设置WebSocket
     */
    private setupWebSocket;
    /**
     * 处理认证
     */
    private handleAuth;
    /**
     * 发送请求到客户端
     */
    private sendRequestToClient;
    /**
     * 处理响应
     */
    private handleResponse;
    /**
     * 获取可用客户端
     * @param clientId 可选的客户端ID，如果指定则只返回该客户端
     */
    private getAvailableClient;
    /**
     * 启动心跳
     */
    private startHeartbeat;
    /**
     * 启动服务器
     */
    start(): void;
    /**
     * 停止服务器
     */
    stop(): void;
}
export default ProxyServer;
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