import { OnDestroy } from '@angular/core';
import { Observable } from 'rxjs';
import * as i0 from "@angular/core";
/**
 * Network status information
 */
export interface NetworkStatus {
    isOnline: boolean;
    lastOnlineAt: number | null;
    lastOfflineAt: number | null;
    offlineDurationMs: number;
}
/**
 * Service for tracking network connectivity status
 */
export declare class FgsNetworkStatusService implements OnDestroy {
    private config;
    private ngZone;
    private isInitialized;
    private onlineHandler;
    private offlineHandler;
    private networkStatus;
    private wentOnline;
    private wentOffline;
    /**
     * Observable for network status changes
     */
    networkStatus$: Observable<NetworkStatus>;
    /**
     * Emitted when network comes back online (emits duration offline in ms)
     */
    wentOnline$: Observable<number>;
    /**
     * Emitted when network goes offline
     */
    wentOffline$: Observable<void>;
    private get debug();
    /**
     * Check if currently online
     */
    get isOnline(): boolean;
    /**
     * Get current offline duration (0 if online)
     */
    get currentOfflineDurationMs(): number;
    /**
     * Initialize network status monitoring
     */
    initialize(): void;
    /**
     * Handle online event
     */
    private handleOnline;
    /**
     * Handle offline event
     */
    private handleOffline;
    /**
     * Manually check network status
     * Useful for verifying actual connectivity beyond browser API
     */
    checkConnectivity(testUrl?: string): Promise<boolean>;
    /**
     * Get current network status
     */
    getStatus(): NetworkStatus;
    /**
     * Cleanup on destroy
     */
    ngOnDestroy(): void;
    /**
     * Debug logging
     */
    private log;
    static ɵfac: i0.ɵɵFactoryDeclaration<FgsNetworkStatusService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<FgsNetworkStatusService>;
}
//# sourceMappingURL=network-status.service.d.ts.map