import type { Context } from '../context.js';
export interface MetricsOptions {
    prefix?: string;
    collectDefaultMetrics?: boolean;
    customMetrics?: {
        name: string;
        type: 'counter' | 'gauge' | 'histogram' | 'summary';
        description: string;
        labels?: string[];
    }[];
}
export declare class MetricsManager {
    private prefix;
    private metrics;
    constructor(options?: MetricsOptions);
    private createMetric;
    private initializeDefaultMetrics;
    getMetric(name: string): any;
    incrementCounter(name: string, labels?: Record<string, string>, value?: number): void;
    setGauge(name: string, value: number, labels?: Record<string, string>): void;
    observeHistogram(name: string, value: number, labels?: Record<string, string>): void;
    observeSummary(name: string, value: number, labels?: Record<string, string>): void;
    recordHttpRequest(method: string, route: string, status: number, duration: number): void;
    setActiveUsers(count: number): void;
    recordOrder(status?: string): void;
    recordRevenue(amountInCents: number): void;
    setDatabaseConnections(count: number): void;
    setCacheHitRatio(ratio: number): void;
    getMetrics(): Promise<string>;
    reset(): void;
}
export declare function metricsPlugin(options?: MetricsOptions): (ctx: Context, next: () => Promise<any>) => Promise<void>;
//# sourceMappingURL=metrics.d.ts.map