import type { DownloadProgressEvent } from '../definitions';
/**
 * Manages file downloads with progress tracking and resume capability
 */
export declare class DownloadManager {
    private activeDownloads;
    private readonly logger;
    private readonly configManager;
    private filesystem;
    constructor();
    /**
     * Initialize the download manager
     */
    initialize(): Promise<void>;
    /**
     * Validate URL against allowed hosts
     */
    private validateUrl;
    /**
     * Download a file with progress tracking
     */
    download(url: string, bundleId: string, onProgress?: (event: DownloadProgressEvent) => void): Promise<Blob>;
    /**
     * Validate content type
     */
    private isValidContentType;
    /**
     * Validate blob size
     */
    private validateBlobSize;
    /**
     * Cancel a download
     */
    cancelDownload(bundleId: string): void;
    /**
     * Cancel all active downloads
     */
    cancelAllDownloads(): void;
    /**
     * Check if a download is active
     */
    isDownloading(bundleId: string): boolean;
    /**
     * Get active download count
     */
    getActiveDownloadCount(): number;
    /**
     * Download with retry logic
     */
    downloadWithRetry(url: string, bundleId: string, onProgress?: (event: DownloadProgressEvent) => void): Promise<Blob>;
    /**
     * Convert blob to ArrayBuffer
     */
    blobToArrayBuffer(blob: Blob): Promise<ArrayBuffer>;
    /**
     * Save blob to filesystem
     */
    saveBlob(bundleId: string, blob: Blob): Promise<string>;
    /**
     * Load blob from filesystem
     */
    loadBlob(bundleId: string): Promise<Blob | null>;
    /**
     * Delete blob from filesystem
     */
    deleteBlob(bundleId: string): Promise<void>;
}