/**
 * Performance Monitor for ConversionIQ SDK
 * Tracks Core Web Vitals and SDK performance metrics
 */
import { ConversionIQConfig } from '../types/index';
interface PerformanceMetric {
    name: string;
    value: number;
    timestamp: number;
    rating: 'good' | 'needs-improvement' | 'poor';
}
interface WebVitalsData {
    CLS?: PerformanceMetric;
    FID?: PerformanceMetric;
    FCP?: PerformanceMetric;
    LCP?: PerformanceMetric;
    TTFB?: PerformanceMetric;
}
export declare class PerformanceMonitor {
    private config;
    private observers;
    private vitals;
    private sdkMetrics;
    private isSupported;
    constructor(config: ConversionIQConfig);
    /**
     * Initialize performance monitoring
     */
    init(): void;
    /**
     * Measure Core Web Vitals
     */
    private measureWebVitals;
    /**
     * Measure SDK-specific performance metrics
     */
    private measureSDKPerformance;
    /**
     * Setup navigation timing measurements
     */
    private setupNavigationTiming;
    /**
     * Observe performance metrics
     */
    private observeMetric;
    /**
     * Measure synchronous operation performance
     */
    measureSync<T>(name: string, fn: () => T): T;
    /**
     * Measure asynchronous operation performance
     */
    measureAsync<T>(name: string, fn: () => Promise<T>): Promise<T>;
    /**
     * Get performance rating based on metric thresholds
     */
    private getRating;
    /**
     * Get all Web Vitals data
     */
    getWebVitals(): WebVitalsData;
    /**
     * Get SDK performance metrics
     */
    getSDKMetrics(): Record<string, number>;
    /**
     * Get performance summary
     */
    getPerformanceSummary(): {
        webVitals: WebVitalsData;
        sdkMetrics: Record<string, number>;
        overallRating: 'good' | 'needs-improvement' | 'poor';
    };
    /**
     * Report performance data to analytics endpoint
     */
    reportPerformance(): Promise<void>;
    /**
     * Clean up performance observers
     */
    destroy(): void;
}
export {};
//# sourceMappingURL=PerformanceMonitor.d.ts.map