import { EventEmitter } from 'events';
import { AgentConnection, ServerConfig, ConnectionStats } from '../types';
import { SecurityMiddleware, SecurityConfig } from '../security';
/**
 * High-performance WebSocket server for agent connections
 * Handles connection lifecycle, heartbeat, reconnection logic, and security
 */
export declare class WebSocketServer extends EventEmitter {
    private wss;
    private connections;
    private heartbeatInterval;
    private config;
    private security;
    private stats;
    constructor(config: ServerConfig, securityConfig?: SecurityConfig);
    /**
     * Start the WebSocket server
     */
    start(): Promise<void>;
    /**
     * Handle new WebSocket connection
     */
    private handleConnection;
    /**
     * Handle incoming message from agent
     */
    private handleMessage;
    /**
     * Handle pong response (heartbeat)
     */
    private handlePong;
    /**
     * Handle connection close
     */
    private handleDisconnection;
    /**
     * Handle WebSocket error
     */
    private handleError;
    /**
     * Start heartbeat mechanism (ping/pong)
     */
    private startHeartbeat;
    /**
     * Send message to specific connection
     */
    sendToConnection(connectionId: string, message: any): boolean;
    /**
     * Send message to specific agent
     */
    sendToAgent(agentId: string, message: any): boolean;
    /**
     * Broadcast message to all connected agents
     */
    broadcast(message: any, excludeConnectionId?: string): void;
    /**
     * Send error message to connection
     */
    private sendError;
    /**
     * Update agent information for a connection
     */
    updateAgentInfo(connectionId: string, agentId: string, capabilities: string[]): boolean;
    /**
     * Get connection by ID
     */
    getConnection(connectionId: string): AgentConnection | undefined;
    /**
     * Get all active connections
     */
    getConnections(): AgentConnection[];
    /**
     * Get connection statistics
     */
    getStats(): ConnectionStats;
    /**
     * Generate unique connection ID
     */
    private generateConnectionId;
    /**
     * Stop the WebSocket server
     */
    stop(): Promise<void>;
    /**
     * Get security middleware (for key management)
     */
    getSecurity(): SecurityMiddleware | null;
}
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