/**
 * Iframe Communication Manager for Tronic SDK
 *
 * Handles bidirectional communication with the iframe app to avoid CORS issues.
 * Delegates recommendation requests to the iframe.
 */
import type { CommunicationManager } from './communication-types';
export declare class IframeCommunicationManager implements CommunicationManager {
    private iframe;
    private isIframeReady;
    private pendingRequests;
    private messageListener;
    private requestCounter;
    private readonly REQUEST_TIMEOUT;
    private readonly DEBUG_ENABLED;
    constructor(iframe?: HTMLIFrameElement);
    /**
     * Set or update the iframe reference
     */
    setIframe(iframe: HTMLIFrameElement): void;
    /**
     * Check if the communication manager is ready to send messages
     */
    isReady(): boolean;
    /**
     * Request recommendation from iframe
     */
    requestRecommendation(pageUrl: string, keywords: string[], context?: Record<string, any>): Promise<any>;
    /**
     * Send message to iframe and wait for response
     */
    private sendMessageWithResponse;
    /**
     * Setup message listener for iframe responses
     */
    private setupMessageListener;
    /**
     * Handle recommendation response
     */
    private handleRecommendationResponse;
    /**
     * Handle user data updated message from iframe
     */
    private handleUserDataUpdated;
    /**
     * Check if iframe is ready to receive messages
     */
    private checkIframeReady;
    /**
     * Check if message origin is trusted
     */
    private isMessageFromTrustedOrigin;
    /**
     * Generate unique request ID
     */
    private generateRequestId;
    /**
     * Debug logging
     */
    private debugLog;
    /**
     * Cleanup resources
     */
    private cleanup;
    /**
     * Destroy the communication manager
     */
    destroy(): void;
}
/**
 * Get or create the global communication manager instance
 */
export declare function getCommunicationManager(iframe?: HTMLIFrameElement): IframeCommunicationManager;