/**
 * Heartbeat Manager for Grain Analytics
 * Tracks session activity with consent-aware behavior
 */
import type { ActivityDetector } from './activity';
export interface HeartbeatConfig {
    activeInterval: number;
    inactiveInterval: number;
    debug?: boolean;
}
export interface HeartbeatTracker {
    trackSystemEvent(eventName: string, properties: Record<string, unknown>): void;
    hasConsent(category?: string): boolean;
    getEffectiveUserId(): string;
    getEphemeralSessionId(): string;
    getSessionId(): string;
    getCurrentPage(): string | null;
    getEventCountSinceLastHeartbeat(): number;
    resetEventCountSinceLastHeartbeat(): void;
}
export declare class HeartbeatManager {
    private config;
    private tracker;
    private activityDetector;
    private heartbeatTimer;
    private isDestroyed;
    private lastHeartbeatTime;
    private currentInterval;
    private hasSentPageLoadHeartbeat;
    constructor(tracker: HeartbeatTracker, activityDetector: ActivityDetector, config: HeartbeatConfig);
    /**
     * Send initial heartbeat when page loads
     */
    private sendPageLoadHeartbeat;
    /**
     * Schedule the next heartbeat based on current activity
     */
    private scheduleNextHeartbeat;
    /**
     * Send heartbeat event
     */
    private sendHeartbeat;
    /**
     * Destroy the heartbeat manager
     */
    destroy(): void;
}
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