import { BatchDeleteResult, CopyResult, HealthStatus, IStorageProvider, ListResult, LocalStorageOptions, MoveResult, PreSignedUploadInfo, UploadResult } from '../interfaces/storage-provider.interface';
import { FileBuffer } from '../interfaces/file-buffer.interface';
import { UploadOptions } from '../interfaces/upload-options.interface';
import { FileMetadata } from '../interfaces/file-metadata.interface';
/**
 * 本地文件存储提供者
 */
export declare class LocalStorageProvider implements IStorageProvider {
    private readonly options;
    name: string;
    private readonly logger;
    private initialized;
    constructor(options: LocalStorageOptions);
    /**
     * 初始化存储配置
     */
    initialize(): Promise<void>;
    /**
     * 上传文件
     */
    upload(file: FileBuffer, options: UploadOptions): Promise<UploadResult>;
    /**
     * 下载文件
     */
    download(filePath: string): Promise<FileBuffer>;
    /**
     * 删除文件
     */
    delete(filePath: string): Promise<void>;
    /**
     * 批量删除
     */
    deleteBatch(paths: string[]): Promise<BatchDeleteResult>;
    /**
     * 检查文件是否存在
     */
    exists(filePath: string): Promise<boolean>;
    /**
     * 获取文件元数据
     */
    getMetadata(filePath: string): Promise<FileMetadata>;
    /**
     * 获取预签名URL（本地存储不支持，返回直接URL）
     */
    getSignedUrl(filePath: string, expiresIn?: number): Promise<string>;
    /**
     * 获取预签名上传URL（本地存储不支持）
     */
    getSignedUploadUrl(filePath: string, expiresIn?: number, contentType?: string): Promise<PreSignedUploadInfo>;
    /**
     * 复制文件
     */
    copy(sourcePath: string, destinationPath: string): Promise<CopyResult>;
    /**
     * 移动文件
     */
    move(sourcePath: string, destinationPath: string): Promise<MoveResult>;
    /**
     * 列出文件
     */
    list(prefix?: string, limit?: number): Promise<ListResult>;
    /**
     * 健康检查
     */
    healthCheck(): Promise<HealthStatus>;
    /**
     * 生成文件路径
     */
    private generateFilePath;
    /**
     * 获取文件URL
     */
    private getFileUrl;
    /**
     * 计算文件哈希
     */
    private calculateFileHash;
    /**
     * 递归读取目录
     */
    private readDirRecursive;
    /**
     * 验证路径安全性，防止路径遍历攻击
     */
    private validatePath;
    /**
     * 验证文件是否在上传目录内
     */
    private ensurePathWithinUpload;
    /**
     * 根据扩展名获取 MIME 类型
     */
    private getMimeTypeFromExtension;
    /**
     * 确保已初始化
     */
    private ensureInitialized;
}