import { IMetricsCollector, Metric } from './interfaces';
/**
 * In-memory metrics collector with time-based retention
 */
export declare class MetricsCollector implements IMetricsCollector {
    private metrics;
    private timers;
    private retentionHours;
    private cleanupInterval;
    constructor(retentionHours?: number);
    recordCounter(name: string, value?: number, labels?: Record<string, string>): void;
    recordGauge(name: string, value: number, labels?: Record<string, string>): void;
    recordHistogram(name: string, value: number, labels?: Record<string, string>): void;
    startTimer(name: string, labels?: Record<string, string>): () => void;
    getMetrics(): Promise<Metric[]>;
    getMetricByName(name: string): Promise<Metric[]>;
    clearMetrics(): void;
    /**
     * Get aggregated performance metrics
     */
    getPerformanceMetrics(): Promise<Record<string, number>>;
    /**
     * Get metrics for a specific time range
     */
    getMetricsInRange(startTime: Date, endTime: Date): Promise<Metric[]>;
    /**
     * Export metrics in Prometheus format
     */
    exportPrometheus(): Promise<string>;
    destroy(): void;
    private addMetric;
    private getLabelKey;
    private getHistogramBuckets;
    private startCleanupInterval;
    private cleanupOldMetrics;
    private getMetricNameFromKey;
    private getMetricDescription;
    private formatPrometheusLabels;
}
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