import { HttpRequest, HttpResponse } from "../types";
export interface MetricsClient {
    counter(name: string, value?: number, labels?: Record<string, string | number>): void;
    histogram(name: string, value: number, labels?: Record<string, string | number>): void;
    gauge(name: string, value: number, labels?: Record<string, string | number>): void;
    summary(name: string, value: number, labels?: Record<string, string | number>): void;
}
export interface MetricsCollector {
    recordResponseTime(route: string, method: string, duration: number): void;
    recordRequestCount(route: string, method: string, statusCode: number): void;
    recordErrorRate(route: string, method: string, errorType: string): void;
    recordMemoryUsage(): void;
    recordCpuUsage(): void;
    counter(name: string, value?: number, labels?: Record<string, string | number>): void;
    histogram(name: string, value: number, labels?: Record<string, string | number>): void;
    gauge(name: string, value: number, labels?: Record<string, string | number>): void;
    summary(name: string, value: number, labels?: Record<string, string | number>): void;
    withRequestContext(req: HttpRequest, res: HttpResponse, next: () => void): void;
    destroy(): void;
}
export interface MetricsConfig {
    enabled: boolean;
    metrics: {
        responseTime: boolean;
        requestCount: boolean;
        errorRate: boolean;
        memoryUsage: boolean;
        cpuUsage: boolean;
    };
    client?: MetricsClient;
    collectInterval?: number;
    includeRouteParams?: boolean;
    customLabels?: Record<string, string | number>;
}
export interface MetricsData {
    timestamp: number;
    type: 'counter' | 'histogram' | 'gauge' | 'summary';
    name: string;
    value: number;
    labels: Record<string, string | number>;
}
export interface BuiltInMetrics {
    responseTime: {
        route: string;
        method: string;
        duration: number;
    };
    requestCount: {
        route: string;
        method: string;
        statusCode: number;
    };
    errorRate: {
        route: string;
        method: string;
        errorType: string;
    };
    memoryUsage: {
        used: number;
        total: number;
        percentage: number;
    };
    cpuUsage: {
        percentage: number;
    };
}
export declare class ConsoleMetricsClient implements MetricsClient {
    counter(name: string, value?: number, labels?: Record<string, string | number>): void;
    histogram(name: string, value: number, labels?: Record<string, string | number>): void;
    gauge(name: string, value: number, labels?: Record<string, string | number>): void;
    summary(name: string, value: number, labels?: Record<string, string | number>): void;
}