/**
 * PostgreSQL Vector Store with pgvector
 *
 * Provides vector similarity search using PostgreSQL with:
 * - pgvector extension for vector embeddings
 * - Full-text search using tsvector/tsquery
 * - Hybrid search with RRF (Reciprocal Rank Fusion)
 *
 * Requires PostgreSQL with pgvector extension installed.
 * See docs/STORAGE.md for setup instructions.
 */
import { IVectorStore, VectorDocument, VectorSearchResult } from '../interfaces';
export interface PostgresVectorStoreConfig {
    host: string;
    port: number;
    database: string;
    user: string;
    password: string;
    maxConnections?: number;
}
export declare class PostgresVectorStore implements IVectorStore {
    private config;
    private pool;
    private initialized;
    constructor(config: PostgresVectorStoreConfig);
    /**
     * Initialize schema (create tables if not exist)
     */
    initialize(): Promise<void>;
    upsert(doc: Omit<VectorDocument, 'createdAt' | 'updatedAt'>): Promise<void>;
    upsertMany(docs: Array<Omit<VectorDocument, 'createdAt' | 'updatedAt'>>): Promise<void>;
    searchByVector(embedding: number[], projectId: string, limit?: number): Promise<VectorSearchResult[]>;
    searchByText(query: string, projectId: string, limit?: number): Promise<VectorSearchResult[]>;
    searchHybrid(query: string, embedding: number[], projectId: string, limit?: number): Promise<VectorSearchResult[]>;
    getById(id: string): Promise<VectorDocument | null>;
    getFileEmbeddings(projectId: string, filePaths: string[]): Promise<Map<string, number[][]>>;
    getFilePathsForDir(projectId: string, dirPath: string): Promise<string[]>;
    deleteByFilePathPrefix(projectId: string, prefix: string): Promise<number>;
    deleteByProject(projectId: string): Promise<number>;
    delete(id: string): Promise<boolean>;
    deleteByFiles(projectId: string, filePaths: string[]): Promise<number>;
    getFileHashes(projectId: string): Promise<Map<string, string>>;
    count(projectId: string): Promise<number>;
    countFiles(projectId: string): Promise<number>;
    getFileMetadata(projectId: string, filePath: string): Promise<{
        fileHash: string;
        indexedAt: string;
    } | null>;
    flush(): Promise<void>;
    close(): Promise<void>;
    /**
     * Test connection health
     */
    healthCheck(): Promise<boolean>;
    private rowToDocument;
}
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