import { FMConfig } from "./types/fmconfig-types.js";
import { VerifyFilesOptions, CopyFileOptions, DeleteFileOptions, DeleteFolderOptions, DownloadFolderOptions, GetDownloadUrlOptions, DownloadToDiskOptions, FilePayload, GetStreamOptions, UploadOptions, ListFoldersOptions, ListFilesOptions, DownloadFileOptions, MoveFileOptions, RenameFileOptions } from "./types/input-types.js";
import { Readable } from "stream";
import { CopyReturnType, DeleteFolderReturnType, DownloadFolderReturnType, MoveReturnType, RenameReturnType, UploadFilesReturnType } from "./types/return-types.js";
/**
 * ╔════════════════════════════════════════════════════════════════════════════╗
 * ║ 📦 S3 FILE MANAGER                                                         ║
 * ║ Primary facade class for interacting with S3. Provides unified public      ║
 * ║ methods for uploading, downloading, and inspecting files.                  ║
 * ║ Internally delegates to UploadManager, DownloadManager, and FileService.   ║
 * ╚════════════════════════════════════════════════════════════════════════════╝
 */
export declare class S3FileManager {
    private readonly sharedContext;
    private readonly uploads;
    private readonly downloads;
    private readonly services;
    constructor(config: FMConfig);
    /**
 ╔════════════════════════════════════════════════════════════════════════════════╗
 ║ 🧾 FILE SERVICE                                                                ║
 ║ Public-facing interface for loading, saving, or transferring file data         ║
 ║ through the S3 storage layer. Orchestrates upload/download logic.              ║
 ╚════════════════════════════════════════════════════════════════════════════════╝
 */
    /**
     * Lists all files in the S3 bucket or under a given prefix in the S3 bucket.
     * @param prefix - The S3 prefix under which to search
     * @param options - Optional settings including filter and compare functions and tracing span settings.
     * If prefix is not supplied, all file paths in bucket are listed.
     * @returns A promise resolving to an array of file paths.
     */
    listFiles(prefix: string, options?: ListFilesOptions): Promise<string[]>;
    /**
     * Lists all directories (common prefixes) in the S3 bucket or within a given prefix in the S3 bucket.
     * @param prefix - The S3 prefix under which to search
     * @param options - Optional settings including filter and compare functions and tracing span settings.
     * If prefix is not supplied, all directories in bucket are listed.
     * @returns Promise resolving to an array of directory names (prefixes).
     */
    listFolders(prefix: string, options?: ListFoldersOptions): Promise<string[]>;
    /**
     * Verifies the existence of multiple files in the S3 bucket.
     * @param filePaths - An array of S3 file paths to check.
     * @param options - Optional settings including prefix and tracing span settings.
     * @returns A promise resolving to an array of missing file paths.
     */
    verifyFilesExist(filenames: string[], options?: VerifyFilesOptions): Promise<string[]>;
    /**
     * Copies a file from one location to another within the same bucket or from a different bucket to the current bucket.
     * Optionally allows renaming the file during the copy operation.
     * @param filePath - Path to the file in the bucket to copy.
     * @param destinationPrefix - The prefix to copy the file to.
     * @param options - Optional settings including source bucket name and tracing span settings.
     * @returns A promise resolving to a CopyReturnType object indicating success, source path, and destination path.
     */
    copyFile(filePath: string, destinationPrefix: string, options?: CopyFileOptions): Promise<CopyReturnType>;
    /**
     * Moves a file from its current location to a new destination prefix.
     * This operation copies the file and then deletes the original.
     * If the copy succeeds but the delete fails, the copied file remains.
     * @param filePath - Path to the file in the bucket to move.
     * @param destinationPrefix - The new prefix/location where the file should be moved.
     * @param options - Optional settings including source bucket name and tracing span settings.
     * @returns A promise resolving to a MoveReturnType object indicating success, source and destination, and whether original was deleted.
     */
    moveFile(filePath: string, destinationPrefix: string, options?: MoveFileOptions): Promise<MoveReturnType>;
    /**
     * Renames a file within the same directory by copying it to a new filename and deleting the original.
     * @param filePath - Path to the file in the bucket to rename.
     * @param newFilename - The new filename to use.
     * @param options - Optional tracing span settings.
     * @returns A promise resolving to a RenameReturnType object indicating success, old and new path, and whether original was deleted.
     */
    renameFile(filePath: string, newFilename: string, options?: RenameFileOptions): Promise<RenameReturnType>;
    /**
     * Deletes a file from the S3 bucket. Handles missing files gracefully.
     * @param filePath - Path to the file in the bucket to delete.
     * @param options - Optional tracing span settings.
     * @returns A promise resolving to a DeleteReturnType object indicating success, deletion status, and file path.
     */
    deleteFile(filePath: string, options?: DeleteFileOptions): Promise<void>;
    /**
     * Deletes all objects under the given prefix (folder) in the S3 bucket.
     *
     * @param prefix - The S3 key prefix representing the folder to delete.
     * @param options - Optional settings including tracing span options.
     * @returns A promise resolving to a DeleteFolderReturnType object containing:
     *   - success: boolean indicating if the folder deletion succeeded.
     *   - failed: number of objects that failed to delete.
     *   - succeeded: number of objects successfully deleted.
     *   - fileDeletionErrors: array of error details for any failed deletions.
     */
    deleteFolder(prefix: string, options?: DeleteFolderOptions): Promise<DeleteFolderReturnType>;
    /**
 ╔════════════════════════════════════════════════════════════════════════════════╗
 ║ 📤 UPLOAD MANAGER                                                              ║
 ║ Handles file uploads to S3, including direct uploads, multipart uploads, and   ║
 ║ retry logic for reliability.                                                   ║
 ╚════════════════════════════════════════════════════════════════════════════════╝
 */
    /**
     * Uploads a file to the configured S3 bucket.
     * Automatically chooses between single and multipart upload based on size.
     * @param file - Object containing file name, content (Buffer or Readable), optional MIME type, and optional size hint.
     * @param options - Optional settings including prefix and spanOptions.
     * @returns A promise that resolves when the file is successfully uploaded.
     */
    uploadFile(file: FilePayload, options?: UploadOptions): Promise<string>;
    /**
     * Uploads multiple files concurrently to S3.
     * Gracefully logs and skips failed uploads without halting the entire batch.
     * @param files - Array of file objects, each containing file name, content (Buffer or Readable), optional MIME type, and optional size hint.
     * @param options - Optional settings including prefix and spanOptions.
     * @returns A promise resolving to a list of files that failed to upload.
     */
    uploadMultipleFiles(files: FilePayload[], options?: UploadOptions): Promise<UploadFilesReturnType>;
    /**
     * Uploads a single file from a local disk path to the S3 bucket.
     * Automatically determines file name and stream type.
     * @param localFilePath - Absolute or relative path to the local file to upload.
     * @param options - Optional settings including prefix and spanOptions.
     * @returns A promise resolving to the S3 key (path) of the uploaded file.
     */
    uploadFromDisk(localFilePath: string, options?: UploadOptions): Promise<string>;
    /**
     * Uploads multiple local files to S3 in parallel.
     * Gracefully logs and skips failed uploads without halting the entire batch.
     * Automatically determines file names and stream types for each file.
     * @param localFilePaths - Array of absolute or relative paths to local files.
     * @param options - Optional settings including prefix and spanOptions.
     * @returns A promise resolving to an object containing an array of failed file paths.
     */
    uploadMultipleFromDisk(localFilePaths: string[], options?: UploadOptions): Promise<UploadFilesReturnType>;
    /**
 ╔════════════════════════════════════════════════════════════════════════════════╗
 ║ 📥 DOWNLOAD MANAGER                                                            ║
 ║ Manages downloads from S3, supporting buffered and streamed file retrieval,    ║
 ║ with support for metadata extraction and type detection.                       ║
 ╚════════════════════════════════════════════════════════════════════════════════╝
 */
    /**
     * Streams a file from the S3 bucket using a readable stream.
     * @param filePath - Path to the file in the bucket.
     * @param options - Optional settings including custom timeout duration and tracing options.
     * @returns A readable stream of the file's contents.
     */
    getStream(filePath: string, options?: GetStreamOptions): Promise<Readable>;
    /**
     * Loads a file's contents into memory as a string, Buffer, or parsed object depending on type.
     * @param filePath - Path to the file in the bucket.
     * @param options - Optional tracing span settings.
     * @returns The file's contents as a string, object, or Buffer.
     */
    downloadFile(filePath: string, options?: DownloadFileOptions): Promise<string | Buffer | object>;
    /**
     * Downloads a file from S3 and saves it to a specified location on disk.
     * Determines file name and extension based on S3 metadata or user overrides.
     * @param filePath - Path to the file in the bucket.
     * @param outDir - Path to folder in which to save the file.
     * @param options - Optional output filename override and tracing span settings.
     * @returns A promise that resolves when the file is successfully uploaded.
     */
    downloadToDisk(filePath: string, outDir: string, options?: DownloadToDiskOptions): Promise<void>;
    /**
     * Downloads all files in the S3 bucket with the specified prefix to a local directory.
     *
     * @param prefix - The S3 key prefix to filter which files to download.
     * @param outDir - The local directory path where files will be saved.
     * @param options - Optional settings, including tracing span options.
     * @returns A promise that resolves to a DownloadFolderReturnType object containing:
     *   - success: boolean indicating if all required downloads succeeded (true if at least some files downloaded without all failing).
     *   - message: descriptive status message.
     *   - downloadedFiles: number of files successfully downloaded.
     *   - failedToDownload: array of file paths that failed to download.
     */
    downloadFolderToDisk(prefix: string, outDir: string, options?: DownloadFolderOptions): Promise<DownloadFolderReturnType>;
    /**
     * Generates a presigned URL for temporary access to a file in S3.
     *
     * @param filePath - The S3 key (path) of the file for which to generate a link.
     * @param options - Optional settings including expiresInSec (expiration time in seconds) and tracing span options.
     * @returns A promise that resolves to a string containing the presigned URL.
     */
    getTemporaryDownloadUrl(filePath: string, options?: GetDownloadUrlOptions): Promise<string>;
}