import type { AnalyticsEvent, AnalyticsObserver } from "../types";
declare global {
    interface Window {
        gtag: (...args: any[]) => void;
        dataLayer: any[];
    }
}
/**
 * Configuration options for GA4 analytics
 */
export interface GA4Options {
    /** Google Analytics 4 measurement ID (format: G-XXXXXXXX) */
    measurementId: string;
    /** Custom configuration parameters */
    config?: Record<string, any>;
    /** Whether to enable debug mode */
    debug?: boolean;
}
/**
 * Google Analytics 4 service implementation using gtag.js
 */
export declare class GoogleAnalytics4Service implements AnalyticsObserver {
    private _measurementId?;
    private _initialized;
    private _debug;
    private _config?;
    /**
     * Get the measurement ID for this GA4 instance
     */
    getInstance(): string | undefined;
    /**
     * Initialize Google Analytics 4 with the provided measurement ID
     * @param options - Configuration options for GA4
     */
    init(options: GA4Options): void;
    /**
     * Track an event in Google Analytics 4
     * @param event - The event to track
     * @param debug - Whether to log debug information
     */
    onEvent(event: AnalyticsEvent, debug?: boolean): void;
    /**
     * Create a new instance of GoogleAnalytics4Service
     * @returns A new GoogleAnalytics4Service instance
     */
    clone(): GoogleAnalytics4Service;
    /**
     * Load the gtag.js script and initialize with the provided measurement ID
     * @param measurementId - The GA4 measurement ID
     * @param config - Optional configuration parameters
     */
    private _loadGtagScript;
}
export declare const googleAnalytics4Service: GoogleAnalytics4Service;