/**
 * Plain Text File Processor
 *
 * Processes plain text files (.txt, .text, .log) with line and word counting,
 * encoding detection, and automatic truncation for large files.
 *
 * Priority: 110 (lower priority - catch-all for text files)
 *
 * @module processors/markup/TextProcessor
 *
 * @example
 * ```typescript
 * import { textProcessor, processText, isTextFile } from "./markup/TextProcessor.js";
 *
 * // Check if file is a plain text file
 * if (isTextFile(mimetype, filename)) {
 *   const result = await processText(fileInfo);
 *   if (result.success) {
 *     console.log('Content:', result.data.content);
 *     console.log('Lines:', result.data.lineCount);
 *     console.log('Words:', result.data.wordCount);
 *     if (result.data.truncated) {
 *       console.warn('File was truncated due to size');
 *     }
 *   }
 * }
 * ```
 */
import { BaseFileProcessor } from "../base/BaseFileProcessor.js";
import type { FileInfo, ProcessorFileProcessingResult, ProcessOptions, ProcessedText } from "../../types/index.js";
/**
 * Text Processor - handles plain text files.
 *
 * Features:
 * - Line and word counting
 * - Automatic truncation for large files
 * - UTF-8 encoding support
 *
 * Priority: 110 (lower priority - catch-all for text files)
 *
 * @example
 * ```typescript
 * const processor = new TextProcessor();
 *
 * const result = await processor.processFile({
 *   id: 'txt-123',
 *   name: 'readme.txt',
 *   mimetype: 'text/plain',
 *   size: 1024,
 *   url: 'https://example.com/readme.txt',
 * });
 *
 * if (result.success) {
 *   console.log('Content:', result.data.content);
 *   console.log('Lines:', result.data.lineCount);
 * }
 * ```
 */
export declare class TextProcessor extends BaseFileProcessor<ProcessedText> {
    constructor();
    /**
     * Build processed text result with content analysis.
     * Counts lines and words, and truncates if necessary.
     *
     * @param buffer - Downloaded file content
     * @param fileInfo - Original file information
     * @returns Processed text result with content analysis
     */
    protected buildProcessedResult(buffer: Buffer, fileInfo: FileInfo): ProcessedText;
}
/**
 * Singleton text processor instance.
 * Use this for most processing needs.
 *
 * @example
 * ```typescript
 * import { textProcessor } from "./markup/TextProcessor.js";
 *
 * const result = await textProcessor.processFile(fileInfo);
 * ```
 */
export declare const textProcessor: TextProcessor;
/**
 * Check if a file is a plain text file.
 *
 * @param mimetype - MIME type of the file
 * @param filename - Filename (for extension-based detection)
 * @returns true if the file is a plain text file
 *
 * @example
 * ```typescript
 * if (isTextFile('text/plain', 'readme.txt')) {
 *   // Handle as plain text
 * }
 *
 * // Also works with just filename
 * if (isTextFile('', 'debug.log')) {
 *   // Handle as text based on extension
 * }
 * ```
 */
export declare function isTextFile(mimetype: string, filename: string): boolean;
/**
 * Process a single plain text file.
 * Convenience function that uses the singleton processor.
 *
 * @param fileInfo - File information (can include URL or buffer)
 * @param options - Optional processing options (auth headers, timeout, retry config)
 * @returns Processing result with text content and analysis
 *
 * @example
 * ```typescript
 * const result = await processText({
 *   id: 'txt-123',
 *   name: 'notes.txt',
 *   mimetype: 'text/plain',
 *   size: 2048,
 *   buffer: textBuffer,
 * });
 *
 * if (result.success) {
 *   console.log('Content:', result.data.content);
 *   console.log('Lines:', result.data.lineCount);
 *   console.log('Words:', result.data.wordCount);
 *   if (result.data.truncated) {
 *     console.warn('Content was truncated');
 *   }
 * } else {
 *   console.error('Processing failed:', result.error.userMessage);
 * }
 * ```
 */
export declare function processText(fileInfo: FileInfo, options?: ProcessOptions): Promise<ProcessorFileProcessingResult<ProcessedText>>;