import { Document } from 'bson';
import { CancellationToken, TypedEventEmitter } from '../mongo_types';
import type { QpSessionPause as QpSessionPause } from './session-pause';
/** @public */
export declare type QpPauseEvents = {
    'mongodb:pause': () => void;
    'mongodb:resume': () => void;
};
/** @public */
export declare type QpPausePhase = 'pre' | 'post';
/** @public */
export declare type QpPauseContext = {
    id: string;
    command: Document;
    result: Document | undefined;
    phase: QpPausePhase;
    /** @internal */
    _session: QpSessionPause;
};
/** @public */
export declare class QpPause extends TypedEventEmitter<QpPauseEvents> {
    static kNoPause: string;
    private readonly _queue;
    private _current;
    private readonly logger;
    /** @internal */
    _isCommandCapturing: boolean;
    get isCommandCapturing(): boolean;
    start(): void;
    stop(): void;
    abort(): void;
    resume(updatedDocument: Document | undefined): void;
    wait(token: CancellationToken): Promise<QpPauseContext>;
    /** @internal */
    waitEvent<K extends keyof QpPauseEvents>(event: K, token: CancellationToken): Promise<void>;
    /** @internal */
    pause(pause: QpSessionPause, phase: QpPausePhase, command: Document, result: Document | undefined): void;
    private tryRaisePause;
    private static _instance;
    static get instance(): QpPause;
}
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