import type { SmartProxy } from './smart-proxy.js';
import type { IMetrics, IThroughputData, IThroughputHistoryPoint } from './models/metrics-types.js';
/**
 * Collects and provides metrics for SmartProxy with clean API
 */
export declare class MetricsCollector implements IMetrics {
    private smartProxy;
    private throughputTracker;
    private routeThroughputTrackers;
    private ipThroughputTrackers;
    private requestTimestamps;
    private totalRequests;
    private connectionByteTrackers;
    private samplingInterval?;
    private connectionSubscription?;
    private readonly sampleIntervalMs;
    private readonly retentionSeconds;
    constructor(smartProxy: SmartProxy, config?: {
        sampleIntervalMs?: number;
        retentionSeconds?: number;
    });
    connections: {
        active: () => number;
        total: () => number;
        byRoute: () => Map<string, number>;
        byIP: () => Map<string, number>;
        topIPs: (limit?: number) => Array<{
            ip: string;
            count: number;
        }>;
    };
    throughput: {
        instant: () => IThroughputData;
        recent: () => IThroughputData;
        average: () => IThroughputData;
        custom: (seconds: number) => IThroughputData;
        history: (seconds: number) => Array<IThroughputHistoryPoint>;
        byRoute: (windowSeconds?: number) => Map<string, IThroughputData>;
        byIP: (windowSeconds?: number) => Map<string, IThroughputData>;
    };
    requests: {
        perSecond: () => number;
        perMinute: () => number;
        total: () => number;
    };
    totals: {
        bytesIn: () => number;
        bytesOut: () => number;
        connections: () => number;
    };
    percentiles: {
        connectionDuration: () => {
            p50: number;
            p95: number;
            p99: number;
        };
        bytesTransferred: () => {
            in: {
                p50: number;
                p95: number;
                p99: number;
            };
            out: {
                p50: number;
                p95: number;
                p99: number;
            };
        };
    };
    /**
     * Record a new request
     */
    recordRequest(connectionId: string, routeName: string, remoteIP: string): void;
    /**
     * Record bytes transferred for a connection
     */
    recordBytes(connectionId: string, bytesIn: number, bytesOut: number): void;
    /**
     * Clean up tracking for a closed connection
     */
    removeConnection(connectionId: string): void;
    /**
     * Start the metrics collector
     */
    start(): void;
    /**
     * Stop the metrics collector
     */
    stop(): void;
    /**
     * Alias for stop() for compatibility
     */
    destroy(): void;
}