export interface DocumentRow {
    id: string;
    content: string;
    vector: number[];
    chunk_index: number;
    type: string;
    header_path: string | undefined;
    header_level: number | undefined;
    category: string | undefined;
    terms: string | undefined;
    token_count: number;
}
export interface ChunkData {
    chunkId: string;
    content: string;
    type: string;
    headerPath: string | undefined;
    headerLevel: number | undefined;
    category: string | undefined;
    terms: string | undefined;
    tokenCount: number;
    chunkIndex: number;
}
export declare class DatabaseHandler {
    private db;
    private table;
    private verbose;
    private dbPath;
    private tableName;
    constructor(dbPath: string, options?: {
        verbose?: boolean;
    });
    initialize(): Promise<void>;
    getDocumentCount(): Promise<number>;
    getDocumentsByType(type: string): Promise<DocumentRow[]>;
    getAllDocuments(): Promise<DocumentRow[]>;
    insertDocument(chunk: ChunkData, embedding: number[]): Promise<void>;
    insertDocumentsBatch(chunks: ChunkData[], embeddings: number[][]): Promise<void>;
    clearAllDocuments(): Promise<number>;
    clearDocumentsByType(type: string): Promise<number>;
    vectorSearch(queryVector: number[], limit: number, type?: string): Promise<DocumentRow[]>;
    close(): void;
    getStats(): Promise<{
        totalDocuments: number;
        documentsByType: Record<string, number>;
    }>;
    cleanupOldVersions(): Promise<void>;
    private normalizeRow;
}
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