/**
 * SMI-1340: Language Detection Heuristics
 *
 * Detects programming language of files without extensions using:
 * - Shebang analysis (#!/usr/bin/python, #!/bin/bash, etc.)
 * - Content patterns (import statements, syntax markers)
 * - Magic bytes detection
 * - Statistical analysis of keywords
 *
 * @see docs/internal/architecture/multi-language-analysis.md
 * @module analysis/language-detector
 */
import type { LanguageDetectionResult, LanguageDetectorOptions } from './language-detector.types.js';
export type { LanguageDetectionResult } from './language-detector.types.js';
/**
 * Detects programming language from file content
 *
 * Uses multiple heuristics in order of reliability:
 * 1. Shebang analysis (highest confidence)
 * 2. Content patterns (high confidence)
 * 3. Statistical keyword analysis (lower confidence)
 *
 * @example
 * ```typescript
 * const detector = new LanguageDetector()
 *
 * // Detect from shebang
 * const result1 = detector.detect('#!/usr/bin/env python3\nprint("hello")')
 * // { language: 'python', confidence: 1.0, method: 'shebang', evidence: ['shebang: #!/usr/bin/env python3'] }
 *
 * // Detect from patterns
 * const result2 = detector.detect('fn main() {\n    println!("Hello");\n}')
 * // { language: 'rust', confidence: 0.85, method: 'pattern', evidence: ['function definition'] }
 * ```
 */
export declare class LanguageDetector {
    /** Minimum confidence threshold for detection */
    private minConfidence;
    constructor(options?: LanguageDetectorOptions);
    /**
     * Detect language from file content
     *
     * @param content - File content to analyze
     * @returns Detection result with language, confidence, and evidence
     */
    detect(content: string): LanguageDetectionResult;
    /**
     * Detect language from shebang line
     */
    detectByShebang(content: string): LanguageDetectionResult;
    /**
     * Detect language from content patterns
     */
    detectByPatterns(content: string): LanguageDetectionResult;
    /**
     * Detect language by statistical keyword analysis
     */
    detectByStatistics(content: string): LanguageDetectionResult;
    /**
     * Get confidence threshold
     */
    getMinConfidence(): number;
    /**
     * Set confidence threshold
     */
    setMinConfidence(threshold: number): void;
}
/**
 * Convenience function to detect language
 *
 * @param content - File content to analyze
 * @param options - Detection options
 * @returns Detection result
 */
export declare function detectLanguage(content: string, options?: LanguageDetectorOptions): LanguageDetectionResult;
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