import { DuplicateGroup } from '../types.js';
export declare class CodeSimilarityDetector {
    private projectDir;
    constructor(projectDir: string);
    /**
     * Scan all source files for duplicate code blocks.
     * Returns groups of blocks whose pairwise similarity >= minSimilarity.
     */
    detectDuplicates(minSimilarity?: number): Promise<DuplicateGroup[]>;
    /**
     * Walk the project tree, read each source file, and extract code blocks.
     */
    private collectAllBlocks;
    /**
     * Split a single file into code blocks by tracking brace depth.
     * Recognises the block type (function, method, class, generic block).
     * Only returns blocks with >= 6 lines.
     */
    private extractBlocks;
    /**
     * Compute Jaccard similarity between two code blocks.
     * Tokenises content into word tokens, then calculates |intersection| / |union|.
     */
    private computeSimilarity;
    /**
     * Split content into individual word tokens and return as a Set.
     * Strips punctuation and normalises to lowercase for comparison.
     */
    private tokenize;
    /**
     * Generate a refactoring suggestion based on the types of the duplicate blocks.
     */
    private suggestRefactor;
    /**
     * Walk a directory tree, returning full paths of source files.
     */
    private walkDir;
    /**
     * Produce a unique key for a block (file path + line range).
     */
    private blockKey;
}
//# sourceMappingURL=code-similarity.d.ts.map