import type { StatsAdapter } from '../ports/outbound/stats-adapter.port';
import type { NetworkQuality } from '../types/events.types';
import type { Logger } from '../utils/logger';
import { type StatsEventName, type StatsEventMap } from '../types/stats.types';
import { BaseService } from './base.service';
/**
 * Stats service for network quality and RTC statistics.
 *
 * This service has its own event system completely separate from Session events.
 * Use `session.stats.on(StatsEvent.NetworkQuality, ...)` to listen to stats events.
 */
export declare class StatsService extends BaseService {
    private statsAdapter;
    private eventHandlers;
    private unsubscribes;
    constructor(statsAdapter: StatsAdapter, logger: Logger);
    /** Get current network quality. */
    getNetworkQuality(): NetworkQuality;
    /** Get native RTC stats report. */
    getStats(): Promise<RTCStatsReport>;
    /** Register an event handler for stats events. */
    on<E extends StatsEventName>(event: E, handler: StatsEventMap[E]): void;
    /** Remove an event handler for stats events. */
    off<E extends StatsEventName>(event?: E, handler?: StatsEventMap[E]): void;
    /**
     * Cleanup resources
     * @internal
     */
    destroy(): void;
    private setupEventListeners;
    private emit;
}
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