/**
 * @license
 * Copyright 2025 Google LLC
 * SPDX-License-Identifier: Apache-2.0
 */
import { ToolErrorType } from '../base/tool-error.js';
/**
 * File processing result interface
 */
export interface FileContentResult {
    llmContent: string | any;
    returnDisplay?: string;
    error?: string;
    errorType?: ToolErrorType;
    isTruncated?: boolean;
    linesShown?: [number, number];
    originalLineCount?: number;
}
/**
 * Simple file system service interface
 */
export interface SimpleFileSystemService {
    readTextFile(filePath: string): Promise<string>;
    writeTextFile(filePath: string, content: string): Promise<void>;
    exists(filePath: string): Promise<boolean>;
    stat(filePath: string): Promise<any>;
}
/**
 * Basic file system service implementation
 */
export declare class BasicFileSystemService implements SimpleFileSystemService {
    readTextFile(filePath: string): Promise<string>;
    writeTextFile(filePath: string, content: string): Promise<void>;
    exists(filePath: string): Promise<boolean>;
    stat(filePath: string): Promise<any>;
}
/**
 * Processes file content for reading operations
 */
export declare function processSingleFileContent(filePath: string, _baseDir: string, fileSystemService: SimpleFileSystemService, offset?: number, limit?: number): Promise<FileContentResult>;
/**
 * Gets specific MIME type for a file based on extension
 */
export declare function getSpecificMimeType(filePath: string): string;
/**
 * Checks if a file appears to be binary
 */
export declare function isBinaryFile(filePath: string): Promise<boolean>;
/**
 * Checks if a file is a supported image type
 */
export declare function isImageFile(filePath: string): boolean;
/**
 * Checks if a file is a supported document type
 */
export declare function isDocumentFile(filePath: string): boolean;
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