/**
 * Storage utility functions for cloud provider operations
 */
import { IStorageProviderConfig, IDownloadResult, IDeleteResult, IListFilesResult, ISignedUrlResult, IStorageStatsResult, StorageFileType } from '../types';
interface UploadBlobOptions {
    data: string | Buffer;
    destinationPath: string;
    config: IStorageProviderConfig;
    mimeType?: string;
}
interface DownloadBlobOptions {
    filePath: string;
    config: IStorageProviderConfig;
}
interface DeleteBlobOptions {
    filePath: string;
    config: IStorageProviderConfig;
}
interface ListBlobsOptions {
    prefix?: string;
    fileType?: StorageFileType;
    maxResults?: number;
    continuationToken?: string;
    config: IStorageProviderConfig;
}
interface SignedUrlOptions {
    filePath: string;
    config: IStorageProviderConfig;
    expiresIn?: number;
    action?: 'read' | 'write';
}
interface StatsOptions {
    prefix?: string;
    config: IStorageProviderConfig;
}
/**
 * Upload a file to cloud storage
 */
export declare function uploadBlobToCloud({ data, destinationPath, config, mimeType, }: UploadBlobOptions): Promise<string>;
/**
 * Download a file from cloud storage
 */
export declare function downloadBlobFromCloud({ filePath, config, }: DownloadBlobOptions): Promise<IDownloadResult>;
/**
 * Delete a file from cloud storage
 */
export declare function deleteBlobFromCloud({ filePath, config, }: DeleteBlobOptions): Promise<IDeleteResult>;
/**
 * List files in cloud storage with pagination and optional file type filtering
 * When fileType is specified, fetches and filters files server-side to return only matching types
 */
export declare function listBlobsInCloud({ prefix, fileType, maxResults, continuationToken, config, }: ListBlobsOptions): Promise<IListFilesResult>;
/**
 * Generate a signed URL for temporary access
 */
export declare function generateSignedUrl({ filePath, config, expiresIn, action, }: SignedUrlOptions): Promise<ISignedUrlResult>;
/**
 * Get storage statistics (file counts and sizes by type)
 * Uses provider-native pagination to efficiently count all files without loading full content
 */
export declare function getStorageStats({ prefix, config, }: StatsOptions): Promise<IStorageStatsResult>;
export {};