import { EventEmitter } from "eventemitter3";
import { FormattedStatus } from "../../transfer-visualize/format-transfer-status.js";
import ProgressStatisticsBuilder from "../../transfer-visualize/progress-statistics-builder.js";
import BaseDownloadEngine, { BaseDownloadEngineEvents } from "./base-download-engine.js";
import { DownloadEngineRemote } from "./DownloadEngineRemote.js";
export type DownloadEngineMultiAllowedEngines = BaseDownloadEngine | DownloadEngineRemote | DownloadEngineMultiDownload<any>;
type DownloadEngineMultiDownloadEvents<Engine = DownloadEngineMultiAllowedEngines> = BaseDownloadEngineEvents & {
    childDownloadStarted: (engine: Engine) => void;
    childDownloadClosed: (engine: Engine) => void;
    downloadAdded: (engine: Engine) => void;
};
export type DownloadEngineMultiDownloadOptions = {
    parallelDownloads?: number;
    /**
     * Unpack inner downloads statues to the main download statues,
     * useful for showing CLI progress in separate downloads or tracking download progress separately
     */
    unpackInnerMultiDownloadsStatues?: boolean;
    /**
     * Finalize download (change .ipull file to original extension) after all downloads are settled
     */
    finalizeDownloadAfterAllSettled?: boolean;
    downloadName?: string;
    downloadComment?: string;
};
export default class DownloadEngineMultiDownload<Engine extends DownloadEngineMultiAllowedEngines = DownloadEngineMultiAllowedEngines> extends EventEmitter<DownloadEngineMultiDownloadEvents> {
    readonly downloads: Engine[];
    protected _options: DownloadEngineMultiDownloadOptions;
    protected _aborted: boolean;
    protected _activeEngines: Set<Engine>;
    protected _progressStatisticsBuilder: ProgressStatisticsBuilder;
    protected _downloadStatues: FormattedStatus[] | FormattedStatus[][];
    protected _closeFiles: (() => Promise<void>)[];
    protected _lastStatus: FormattedStatus;
    protected _loadingDownloads: number;
    protected _reloadDownloadParallelisms?: () => void;
    protected _engineWaitPromises: Set<Promise<Engine>>;
    get activeDownloads(): Engine[];
    get parallelDownloads(): number | undefined;
    get loadingDownloads(): number;
    set parallelDownloads(value: number | undefined);
    get downloadStatues(): FormattedStatus[];
    get status(): FormattedStatus;
    get downloadSize(): number;
    protected _init(): void;
    private _addEngine;
    _addDownloadNoStatisticUpdate(engine: Engine | Promise<Engine>): Promise<Engine>;
    addDownload(...engines: (Engine | Promise<Engine>)[]): Promise<void>;
    download(): Promise<void>;
    private _changeEngineFinishDownload;
    private _finishEnginesDownload;
    pause(): void;
    resume(): void;
    close(): Promise<void>;
}
export {};