import WebSocket from 'ws';
import { MessageHandler, Method } from './interfaces';
/**
 * Abstract WebSocketServer class. Describes a namespace once inherited.
 * Wraps the ws lib WebSocket.Server. Includes convenience methods to interact with clients.
 *
 * @abstract
 * @example
 *      class NamespaceA extends WebSocketServer {
 *          constructor(messageHandler: MessageHandler, options: WebSocket.ServerOptions) {
 *              super(messageHandler, options);
 *          }
 *
 *          `@register()`
 *          sum(@param('a') a: number, @param('b') b: number) {
 *              return a + b;
 *          }
 *      }
 */
export declare abstract class WebSocketServer {
    wss: WebSocket.Server;
    protected static methods: Set<Method>;
    protected readonly _namespaceMethods: Map<string, Method>;
    protected _messageHandler: MessageHandler;
    /**
     * @param messageHandler {MessageHandler} - MessageHandler instance
     * @param options {WebSocket.ServerOptions} - ws server options
     * @protected
     */
    protected constructor(messageHandler: MessageHandler, options: WebSocket.ServerOptions);
    /**
     * Returns all registered methods of namespace
     *
     * @returns {Map<string, Method>} - Map of all registered methods in namespace with method name as key
     */
    getMethods(): Map<string, Method>;
    /**
     * Sends passed data to all connected clients
     *
     * @param {WebSocket.Data} data - data to be sent to clients
     */
    broadcastMessage(data: WebSocket.Data): void;
    /**
     * Sends passed data to passed websocket
     *
     * @param ws {WebSocket} - client to receive data
     * @param data {WebSocket.Data} - data to be sent to client
     * @protected
     */
    protected _sendMessage(ws: WebSocket, data: WebSocket.Data): void;
    /**
     * Convenience method to set listeners on websocket connection
     *
     * @param ws {WebSocket} - websocket/client that established a connection
     * @protected
     */
    protected _onConnection(ws: WebSocket): void;
    /**
     * On message listener to handle and process incoming messages
     *
     * @param ws {WebSocket} - websocket/client that sent the message
     * @param message {WebSocket.Data} - data received from the client
     * @protected
     * @returns {Promise<void>}
     */
    protected _onMessage(ws: WebSocket, message: WebSocket.Data): Promise<void>;
    /**
     * Convenience method to initialize namespace specific methods instance variable from all registered methods
     *
     * @returns {Map<string, Method>} - Map of all registered methods in namespace with method name as key
     */
    private _initNamespaceMethods;
}