/**
 * @module @nhtio/adk/batteries/vector/elasticsearch
 *
 * Elasticsearch 8 adapter — each collection is an index with a `dense_vector` field; KNN uses ES8's
 * top-level `knn` search clause with an optional `filter`; the neutral filter tree compiles to bool/term/range
 * over `metadata.*`. Distinct from the opensearch adapter (which speaks OpenSearch's `knn_vector`/`query.knn` dialect).
 */
import { BaseVectorStore } from "../contract";
import type { VectorFilter } from "../filters";
import type { SearchPlan, UpsertPlan, DeletePlan, CollectionSpec } from "../plan";
import type { VectorMatch, VectorStoreCapabilities, BaseVectorStoreOptions } from "../types";
export interface ElasticsearchVectorStoreOptions extends BaseVectorStoreOptions {
    /** Connection and authentication parameters for the backend. */
    connection?: {
        node?: string;
        auth?: {
            username: string;
            password: string;
        } | {
            apiKey: string;
        };
        client?: unknown;
    };
}
/**
 * Compile the neutral filter tree to an Elasticsearch bool-query clause over `metadata.*`.
 * String values use the `.keyword` sub-field for exact match; numbers use range/term.
 */
export declare const translateElasticsearchFilter: (filter?: VectorFilter) => Record<string, unknown> | undefined;
export declare class ElasticsearchVectorStore extends BaseVectorStore {
    #private;
    readonly capabilities: VectorStoreCapabilities;
    /** Static availability probe: whether this adapter's runtime driver can load in the current environment. */
    static isAvailable(): boolean;
    isAvailable(): boolean;
    connect(): Promise<void>;
    close(): Promise<void>;
    createCollection(spec: CollectionSpec, ifNotExists: boolean): Promise<void>;
    dropCollection(collection: string, ifExists: boolean): Promise<void>;
    hasCollection(collection: string): Promise<boolean>;
    renameCollection(_from: string, _to: string): Promise<void>;
    executeUpsert(plan: UpsertPlan): Promise<void>;
    executeSearch(plan: SearchPlan): Promise<VectorMatch[]>;
    executeDelete(plan: DeletePlan): Promise<void>;
}