import type { SessionTimeoutConfig } from "../models/session-timeout-config";
import * as i0 from "@angular/core";
export declare class ServerTimeService {
    private readonly http;
    private readonly timeSource;
    private readonly zone;
    private readonly syncListeners;
    private currentConfig;
    private endpoint;
    private retryAttempts;
    private timerHandle;
    private inFlight;
    private missingHttpClientWarned;
    configure(config: SessionTimeoutConfig): void;
    stop(resetOffset?: boolean): void;
    private triggerSync;
    private fetchServerOffset;
    private parseServerTime;
    registerSyncListener(listener: () => void): void;
    unregisterSyncListener(listener: () => void): void;
    private notifySyncListeners;
    private handleFailure;
    private scheduleNextRetry;
    private scheduleNextSuccess;
    private cancelInFlight;
    private clearTimer;
    private warnMissingHttpClient;
    static ɵfac: i0.ɵɵFactoryDeclaration<ServerTimeService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<ServerTimeService>;
}