import { IStorageProvider } from './storage.interface.js';
import { Readable } from 'node:stream';
export interface S3StorageProviderConfiguration {
    access_key_id: string;
    bucket_name: string;
    endpoint?: string;
    region?: string;
    secret_access_key: string;
}
export declare class S3StorageProvider implements IStorageProvider {
    private readonly bucketName;
    private readonly s3Client;
    constructor(config: S3StorageProviderConfiguration);
    /**
     * Checks if the bucket exists and creates it if it doesn't.
     */
    checkBucket(): Promise<void>;
    /**
     * Copies a file from one path to another.
     * @param source - The source file path and name in S3.
     * @param destination - The destination file path and name in S3.
     */
    copyFile(source: string, destination: string): Promise<void>;
    /**
     * Deletes a file from S3.
     * @param key - The file path and name in S3.
     */
    deleteFile(key: string): Promise<void>;
    /**
     * Deletes multiple files from S3.
     * @param keys - The file paths and names in S3.
     */
    deleteFiles(keys: string[]): Promise<void>;
    /**
     * Downloads a file from S3.
     * @param key - The file path and name in S3.
     * @returns The file as a readable stream.
     */
    downloadFile(key: string): Promise<Readable>;
    /**
     * Checks if a file exists in S3.
     * @param key - The file path and name in S3.
     * @returns True if the file exists, false otherwise.
     */
    fileExists(key: string): Promise<boolean>;
    /**
     * Get the signed URL of a file from the storage.
     * @param key - The file path and name in the storage.
     * @returns The signed URL of the file.
     */
    getFileUrl(key: string): Promise<string>;
    /**
     * Lists files in an S3 bucket.
     * @param prefix - Filter by prefix (optional).
     * @returns Array of file keys in the bucket.
     */
    listFiles(prefix?: string): Promise<string[]>;
    /**
     * Uploads a file to S3.
     * @param key - The file path and name in S3.
     * @param body - The content to upload, either as a string, buffer, or readable stream.
     */
    uploadFile(key: string, body: Buffer | Readable | string): Promise<void>;
}