/**
 * Long-poll client for Philips TV /notifychange endpoint.
 * Matches the official Philips Smart TV app behavior:
 * POSTs to /6/notifychange and blocks until the TV reports state changes.
 *
 * This client maintains its own digest auth independently from PhilipsTVClient
 * to avoid blocking the request queue.
 */
import { EventEmitter } from 'events';
export interface NotifyChangeClientConfig {
    ip: string;
    username: string;
    password: string;
}
export declare class NotifyChangeClient extends EventEmitter {
    private readonly config;
    private readonly debug;
    private running;
    private abortController;
    private consecutiveFailures;
    private reconnectDelay;
    /** Protocol that last worked (null = unknown, probe both) */
    private workingProtocol;
    /** Independent digest auth session (separate from PhilipsTVClient) */
    private readonly authSession;
    constructor(config: NotifyChangeClientConfig, debug: (message: string) => void);
    start(): void;
    stop(): void;
    private pollLoop;
    private longPoll;
    private doLongPollRequest;
    private handleDigestChallenge;
    private safeParseJson;
    private sleep;
}