/**
 * Metrics collection logic for telemetry data
 */
import type { UnifiedTelemetryMetrics, UnifiedTelemetryCounter, UnifiedTelemetryHistogram, UnifiedTelemetryGauge } from '@inh-lib/unified-telemetry-core';
import type { InternalMetricsLabels, InternalTelemetryMetricsConfig } from '../types/middleware.types';
/**
 * Metrics collector for telemetry middleware
 */
export declare function createMetricsCollector(metricsProvider: UnifiedTelemetryMetrics, config: InternalTelemetryMetricsConfig): {
    recordHttpRequest: (labels: InternalMetricsLabels["http_requests"]) => void;
    recordHttpDuration: (durationSeconds: number, labels: InternalMetricsLabels["http_duration"]) => void;
    recordHttpMemoryUsage: (memoryBytes: number, labels: InternalMetricsLabels["http_memory"]) => void;
    recordHttpCpuUsage: (cpuSeconds: number, labels: InternalMetricsLabels["http_cpu"]) => void;
    recordSystemMetrics: (memoryPercent: number, cpuPercent: number, labels: InternalMetricsLabels["system"]) => void;
    getMetrics: () => {
        httpRequestsTotal?: UnifiedTelemetryCounter;
        httpRequestDuration?: UnifiedTelemetryHistogram;
        httpRequestMemory?: UnifiedTelemetryHistogram;
        httpRequestCpu?: UnifiedTelemetryHistogram;
        systemMemoryUsage?: UnifiedTelemetryGauge;
        systemCpuUsage?: UnifiedTelemetryGauge;
    };
};
/**
 * Initialize all metrics based on configuration
 */
export declare function initializeMetrics(metricsProvider: UnifiedTelemetryMetrics, config: InternalTelemetryMetricsConfig): {
    httpRequestsTotal?: UnifiedTelemetryCounter;
    httpRequestDuration?: UnifiedTelemetryHistogram;
    httpRequestMemory?: UnifiedTelemetryHistogram;
    httpRequestCpu?: UnifiedTelemetryHistogram;
    systemMemoryUsage?: UnifiedTelemetryGauge;
    systemCpuUsage?: UnifiedTelemetryGauge;
};
/**
 * Create metrics labels from request context
 */
export declare function createHttpMetricsLabels(method: string, route: string, statusCode: number): InternalMetricsLabels['http_requests'];
/**
 * Create system metrics labels
 */
export declare function createSystemMetricsLabels(serviceName: string, instanceId?: string): InternalMetricsLabels['system'];
/**
 * Normalize HTTP method for metrics
 */
export declare function normalizeHttpMethod(method: string): string;
/**
 * Normalize route for metrics (remove sensitive data)
 */
export declare function normalizeRoute(route: string): string;
/**
 * Get default instance ID
 */
export declare function getDefaultInstanceId(hostName?: string): string;
/**
 * Validate metrics configuration
 */
export declare function validateMetricsConfig(config: InternalTelemetryMetricsConfig): {
    valid: boolean;
    errors: string[];
};
/**
 * Get default metrics configuration
 */
export declare function getDefaultMetricsConfig(): InternalTelemetryMetricsConfig;