/**
 * @file Performance Monitoring Hook
 * @description Enterprise-grade performance monitoring with Web Vitals and custom metrics
 */
interface PerformanceMetrics {
    CLS?: number;
    FCP?: number;
    INP?: number;
    LCP?: number;
    TTFB?: number;
    customMetrics: Map<string, number>;
    resourceTimings: PerformanceResourceTiming[];
    longTasks: PerformanceEntry[];
    memoryUsage?: {
        usedJSHeapSize: number;
        totalJSHeapSize: number;
        jsHeapSizeLimit: number;
    };
}
interface PerformanceThresholds {
    CLS?: number;
    FCP?: number;
    INP?: number;
    LCP?: number;
    TTFB?: number;
    memoryUsage?: number;
}
interface UsePerformanceMonitorOptions {
    enableWebVitals?: boolean;
    enableResourceTiming?: boolean;
    enableLongTaskDetection?: boolean;
    enableMemoryMonitoring?: boolean;
    sampleRate?: number;
    thresholds?: PerformanceThresholds;
    onMetricUpdate?: (metric: Partial<PerformanceMetrics>) => void;
    onThresholdExceeded?: (metricName: string, value: number, threshold: number) => void;
    reportingEndpoint?: string;
    batchSize?: number;
    flushInterval?: number;
}
export declare function usePerformanceMonitor(options?: UsePerformanceMonitorOptions): {
    metrics: PerformanceMetrics;
    trackMetric: (name: string, value: number) => void;
    markNavigationTiming: (name: string) => (() => void) | undefined;
    getResourceStats: () => {
        totalResources: number;
        totalSize: number;
        totalDuration: number;
        byType: Record<string, {
            count: number;
            size: number;
            duration: number;
        }>;
        slowResources: PerformanceResourceTiming[];
    };
    flushMetrics: () => void;
};
export type { PerformanceMetrics, PerformanceThresholds, UsePerformanceMonitorOptions };