import type { DocumentRecord, Chunk, EntityRecord, RelationshipRecord, SearchResult, SearchOptions, GraphSearchResult, DocumentFileType } from '../types/index.js';
export declare class DocumentStore {
    private db;
    private useVec;
    constructor(dbPath?: string);
    private initialize;
    addDocument(filename: string, filetype: DocumentFileType, filepath?: string, title?: string): string;
    getDocument(docId: string): DocumentRecord | null;
    listDocuments(): DocumentRecord[];
    findDocumentByPath(filepath: string): DocumentRecord | null;
    deleteDocument(docId: string): void;
    updateDocumentStats(docId: string, totalChunks: number, totalTokens: number): void;
    addChunks(chunks: Chunk[]): void;
    getChunks(docId: string): Chunk[];
    getChunkById(chunkId: string): Chunk | null;
    addEmbedding(chunkId: string, embedding: number[]): void;
    addEmbeddings(entries: Array<{
        chunkId: string;
        embedding: number[];
    }>): void;
    private getEmbedding;
    /**
     * Vector similarity search using cosine similarity (JS fallback).
     */
    vectorSearch(queryEmbedding: number[], options?: Partial<SearchOptions>): SearchResult[];
    /**
     * Full-text keyword search using FTS5 BM25 ranking.
     */
    keywordSearch(query: string, options?: Partial<SearchOptions>): SearchResult[];
    /**
     * Hybrid search combining vector similarity and BM25 keyword search.
     * Uses Reciprocal Rank Fusion to merge results.
     */
    hybridSearch(queryEmbedding: number[], queryText: string, options?: Partial<SearchOptions>): SearchResult[];
    addEntity(name: string, type: string, docId: string, description?: string, chunkIds?: string[]): number;
    getEntities(docId?: string, type?: string): EntityRecord[];
    findEntityByName(name: string, docId?: string): EntityRecord | null;
    addRelationship(sourceEntityId: number, targetEntityId: number, relationship: string, docId: string, chunkId?: string, weight?: number): number;
    getRelationships(entityId: number): RelationshipRecord[];
    /**
     * Graph-aware search: find entities matching query, traverse relationships,
     * and collect associated chunks.
     */
    graphSearch(query: string, hops?: number, docId?: string): GraphSearchResult;
    getStats(): {
        documents: number;
        chunks: number;
        entities: number;
        relationships: number;
    };
    close(): void;
}
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