import type { DcRouter } from '../classes.dcrouter.js';
import type { IAuthenticationEvent, TAuthenticationFailureReason, TAuthenticationSource, TResolvedAuthenticationSource } from '../../dist_ts_interfaces/data/stats.js';
export interface IAuthenticationWindowStats {
    windowStart: number;
    successes: number;
    failures: number;
    events: IAuthenticationEvent[];
}
export declare class AuthenticationEventManager {
    private dcRouterRef;
    private pendingEvents;
    private recentEvents;
    private flushInFlight?;
    private pruneInFlight?;
    private windowStatsInFlight;
    constructor(dcRouterRef: DcRouter);
    private canPersist;
    private rememberEvent;
    private flushBufferedUnlocked;
    recordAttempt(optionsArg: {
        username: string;
        userId?: string;
        success: boolean;
        requestedAuthSource: TAuthenticationSource;
        resolvedAuthSource?: TResolvedAuthenticationSource;
        failureReason?: TAuthenticationFailureReason;
    }): Promise<IAuthenticationEvent>;
    flushBuffered(): Promise<void>;
    pruneBefore(cutoffArg: number): Promise<number>;
    private getInMemoryWindow;
    private getWindowStatsUnlocked;
    getWindowStats(windowMsArg?: number, limitArg?: number): Promise<IAuthenticationWindowStats>;
    /** Test-only reset for the DcRouter-owned in-process buffers. */
    resetForTests(): Promise<void>;
}