/**
 * Metrics Collection and Monitoring
 * Prometheus-compatible metrics for AIMDS gateway
 */
import { DefenseResult, MetricsSnapshot, ThreatLevel } from '../types';
import { Logger } from '../utils/logger';
export declare class MetricsCollector {
    private logger;
    private requestsTotal;
    private requestsAllowed;
    private requestsBlocked;
    private requestsErrored;
    private threatsDetected;
    private falsePositives;
    private detectionLatency;
    private vectorSearchLatency;
    private verificationLatency;
    private activeRequests;
    private threatLevel;
    private cacheHitRate;
    private stats;
    constructor(logger: Logger);
    /**
     * Initialize metrics collection
     */
    initialize(): Promise<void>;
    /**
     * Record a detection event
     */
    recordDetection(latencyMs: number, result: DefenseResult): void;
    /**
     * Record an error
     */
    recordError(): void;
    /**
     * Record a false positive
     */
    recordFalsePositive(): void;
    /**
     * Update active requests gauge
     */
    updateActiveRequests(count: number): void;
    /**
     * Update threat level gauge
     */
    updateThreatLevel(level: ThreatLevel): void;
    /**
     * Update cache hit rate
     */
    updateCacheHitRate(rate: number): void;
    /**
     * Get current metrics snapshot
     */
    getSnapshot(): Promise<MetricsSnapshot>;
    /**
     * Export Prometheus metrics
     */
    exportPrometheus(): Promise<string>;
    /**
     * Reset all metrics
     */
    reset(): void;
    /**
     * Shutdown metrics collector
     */
    shutdown(): Promise<void>;
    private percentile;
}
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