/**
 * Pattern Similarity Algorithms
 *
 * Calculate similarity between patterns for:
 * - Pattern matching and recommendation
 * - Clustering similar patterns
 * - Measuring cross-project applicability
 */
export interface Pattern {
    id: number;
    name: string;
    problem: string;
    solution: string;
    implementation?: string;
    project: string;
    tags?: string[];
    metrics?: {
        before: any;
        after: any;
        improvement: string;
    };
}
export interface SimilarityScore {
    patternId: number;
    score: number;
    factors: {
        problemSimilarity: number;
        solutionSimilarity: number;
        contextSimilarity: number;
        tagOverlap: number;
    };
}
export declare class PatternSimilarity {
    /**
     * Calculate similarity between two patterns
     */
    calculateSimilarity(pattern1: Pattern, pattern2: Pattern): number;
    /**
     * Calculate detailed similarity factors
     */
    calculateFactors(pattern1: Pattern, pattern2: Pattern): SimilarityScore['factors'];
    /**
     * Find similar patterns to a given pattern
     */
    findSimilar(targetPattern: Pattern, candidates: Pattern[], minSimilarity?: number, maxResults?: number): SimilarityScore[];
    /**
     * Find patterns similar to a problem description
     */
    findByProblem(problemDescription: string, patterns: Pattern[], minSimilarity?: number, maxResults?: number): SimilarityScore[];
    /**
     * Calculate text similarity using Jaccard index
     */
    private textSimilarity;
    /**
     * Calculate context similarity (project, implementation)
     */
    private contextSimilarity;
    /**
     * Calculate tag similarity (Jaccard)
     */
    private tagSimilarity;
    /**
     * Tokenize text into normalized tokens
     */
    private tokenize;
    /**
     * Calculate distance (inverse of similarity)
     */
    calculateDistance(pattern1: Pattern, pattern2: Pattern): number;
}
/**
 * Create pattern similarity calculator
 */
export declare function createPatternSimilarity(): PatternSimilarity;
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