import { OnDestroy } from '@angular/core';
import { Observable } from 'rxjs';
import { ActivityEvent } from '../models/session.model';
import * as i0 from "@angular/core";
/**
 * Service for tracking user activity and managing session validation
 */
export declare class FgsActivityTrackerService implements OnDestroy {
    private config;
    private storageService;
    private sessionTimer;
    private ngZone;
    private isTracking;
    private lastActivityUpdate;
    private lastValidation;
    private boundEventHandlers;
    private readonly TRACKED_EVENTS;
    private activityDetected;
    /**
     * Observable for activity events
     */
    activityDetected$: Observable<ActivityEvent>;
    private get features();
    private get activityThrottleMs();
    private get validationThrottleMs();
    private get debug();
    ngOnDestroy(): void;
    /**
     * Start tracking user activity
     */
    startTracking(): void;
    /**
     * Stop tracking user activity
     */
    stopTracking(): void;
    /**
     * Create throttled event handler for activity events
     */
    private createEventHandler;
    /**
     * Create visibility change handler
     */
    private createVisibilityHandler;
    /**
     * Handle activity event (called after throttle check passes)
     */
    private handleActivity;
    /**
     * Handle visibility change (tab focus)
     */
    private handleVisibilityChange;
    /**
     * Manually record an API call (should be called by interceptor)
     */
    recordApiCall(): void;
    /**
     * Get last activity timestamp
     */
    getLastActivityTime(): number | null;
    /**
     * Get last API call timestamp
     */
    getLastApiCallTime(): number | null;
    /**
     * Get time since last activity in milliseconds
     */
    getIdleTime(): number;
    /**
     * Check if user is considered idle
     */
    isIdle(thresholdMs: number): boolean;
    /**
     * Check if tracking is active
     */
    isActive(): boolean;
    /**
     * Debug logging
     */
    private log;
    static ɵfac: i0.ɵɵFactoryDeclaration<FgsActivityTrackerService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<FgsActivityTrackerService>;
}
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