import { Subscribe } from '../../utils/Subscribe';
export type RobustWebSocketConstructorOptions = {
    url: string | ((ws: RobustWebSocket) => string);
    protocols?: string[];
    robustOptions?: RobustOptions;
};
export type RobustOptions = {
    timeout?: number;
    shouldReconnect?: (event: CloseEvent, ws: RobustWebSocket) => undefined | number;
    should1000Reconnect?: boolean;
    ignoreConnectivityEvents?: boolean;
    automaticOpen?: boolean;
};
export type RobustWebSocketEventDetail = {
    reconnects: number;
    attempts: number;
};
export type RobustWebSocketEvent<T> = Event & {
    detail: T;
};
export type RobustWebSocketEventMap = {
    connecting: (event: RobustWebSocketEvent<RobustWebSocketEventDetail>) => void;
    timeout: (event: RobustWebSocketEvent<RobustWebSocketEventDetail>) => void;
    open: (event: RobustWebSocketEvent<RobustWebSocketEventDetail>) => void;
    closing: () => void;
    close: (event: CloseEvent) => void;
    error: (event: Event) => void;
    message: (event: MessageEvent<string | ArrayBuffer | Blob | ArrayBufferView>) => void;
};
export declare class RobustWebSocket extends Subscribe<RobustWebSocketEventMap> {
    private _realWebSocket;
    private _url?;
    private _protocols;
    private _readyState;
    private _options;
    private _connectTimeout;
    private _attempts;
    private _reconnects;
    private _reconnectWhenOnlineAgain;
    private _explicitlyClosed;
    private _pendingReconnect;
    private _connectivityEventsAttached;
    private _heathCheckTimer;
    get attempts(): number;
    constructor(options?: RobustWebSocketConstructorOptions);
    setOptions(options: RobustWebSocketConstructorOptions): void;
    private _healthCheck;
    private _clearConnectTimeoutIfNeed;
    private _clearHeathCheckIfNeed;
    private _startHealthCheck;
    private _stopHealthCheck;
    private _clearPendingReconnectIfNeeded;
    private _online;
    private _offline;
    private _detachConnectivityEvents;
    private _attachConnectivityEvents;
    send: (data: string | ArrayBuffer | Blob | ArrayBufferView) => void | undefined;
    close: (code?: number | string, reason?: string) => void | undefined;
    open: (url?: string) => void;
    private _createWebSocket;
    private _removeWebSocketEvent;
    private _dispatchWebSocketEvent;
    private _webSocketOpenHandler;
    private _webSocketCloseHandler;
    private _webSocketErrorHandler;
    private _webSocketMessageHandler;
    private _reconnect;
}