/**
 * In-Memory Vector Adapter
 *
 * A local, in-memory vector database implementation.
 * Perfect for development, testing, and small-scale applications.
 */
import { VectorDBType, DistanceMetric, VectorFeature, IVectorConnectionResult, IUpsertVectorsOptions, IUpsertVectorsResult, IQueryVectorsOptions, IQueryVectorsResult, IFetchVectorsOptions, IFetchVectorsResult, IUpdateVectorOptions, IUpdateVectorResult, IDeleteVectorsOptions, IDeleteVectorsResult, IListVectorsOptions, IListVectorsResult, IListNamespacesResult, IVectorIndexInfo, ICreateIndexOptions, ICreateIndexResult, IDeleteIndexOptions, IDeleteIndexResult, IVectorIndexStats } from '../types';
import { BaseVectorAdapter, IAdapterConnectionOptions } from './base.adapter';
/**
 * Stored vector with additional metadata
 */
interface IStoredVector {
    id: string;
    values: number[];
    metadata: Record<string, unknown>;
    createdAt: number;
    updatedAt: number;
}
/**
 * Index configuration
 */
interface IIndexConfig {
    name: string;
    dimensions: number;
    metric: DistanceMetric;
    createdAt: number;
}
/**
 * In-memory vector adapter implementation
 */
export declare class MemoryAdapter extends BaseVectorAdapter {
    readonly type = VectorDBType.MEMORY;
    /** Storage: indexName -> namespace -> vectorId -> vector */
    private storage;
    /** Index configurations */
    private indexes;
    /** Current index name */
    private currentIndex;
    /** Default namespace */
    private defaultNamespace;
    connect(options: IAdapterConnectionOptions): Promise<IVectorConnectionResult>;
    disconnect(): Promise<void>;
    testConnection(): Promise<boolean>;
    upsert(options: IUpsertVectorsOptions): Promise<IUpsertVectorsResult>;
    query(options: IQueryVectorsOptions): Promise<IQueryVectorsResult>;
    fetch(options: IFetchVectorsOptions): Promise<IFetchVectorsResult>;
    update(options: IUpdateVectorOptions): Promise<IUpdateVectorResult>;
    delete(options: IDeleteVectorsOptions): Promise<IDeleteVectorsResult>;
    list(options: IListVectorsOptions): Promise<IListVectorsResult>;
    listNamespaces(): Promise<IListNamespacesResult>;
    deleteNamespace(namespace: string): Promise<void>;
    describeIndex(): Promise<IVectorIndexInfo>;
    getIndexStats(): Promise<IVectorIndexStats>;
    createIndex(options: ICreateIndexOptions): Promise<ICreateIndexResult>;
    deleteIndex(options: IDeleteIndexOptions): Promise<IDeleteIndexResult>;
    listIndexes(): Promise<IVectorIndexInfo[]>;
    supportsFeature(feature: VectorFeature): boolean;
    /**
     * Clear all data (useful for testing)
     */
    clear(): void;
    /**
     * Export all data as JSON (for persistence)
     */
    export(): {
        indexes: Array<IIndexConfig>;
        data: Record<string, Record<string, IStoredVector[]>>;
    };
    /**
     * Import data from JSON (for persistence)
     */
    import(data: {
        indexes: Array<IIndexConfig>;
        data: Record<string, Record<string, IStoredVector[]>>;
    }): void;
    /**
     * Get total memory usage estimate (bytes)
     */
    getMemoryUsage(): number;
    /**
     * Check if metadata matches a filter
     */
    private matchesFilter;
}
export default MemoryAdapter;