import type { CoreEngine } from '../../../app/engine.js';
import { type Controller } from '../../controller/headless-controller.js';
/**
 * A facet payload object to be sorted by the manager.
 */
export interface FacetManagerPayload<T> {
    /**
     * A unique string identifying a facet.
     */
    facetId: string;
    /**
     * The payload to associate with the facetId. This can be anything such as a DOM element, JSX, a string.
     */
    payload: T;
}
/**
 * The `FacetManager` controller helps reorder facets to match the most recent search response.
 *
 * Example: [facet-manager.fn.tsx](https://github.com/coveo/ui-kit/blob/main/samples/headless/search-react/src/components/facet-manager/facet-manager.fn.tsx)
 *
 * @group Controllers
 * @category FacetManager
 */
export interface FacetManager extends Controller {
    /**
     * Sorts the facets to match the order in the most recent search response.
     *
     * @param facets - An array of facet payloads to sort.
     * @returns A sorted array.
     */
    sort<T>(facets: FacetManagerPayload<T>[]): FacetManagerPayload<T>[];
    /**
     * The state of the `CoreFacetManager` controller.
     */
    state: FacetManagerState;
}
/**
 * A scoped and simplified part of the headless engine relevant to the `FacetManager` controller.
 *
 * @group Controllers
 * @category FacetManager
 */
export interface FacetManagerState {
    /**
     * The facet ids sorted in the same order as the latest response.
     */
    facetIds: string[];
}
/**
 * Creates a `FacetManager` instance.
 *
 * @param engine - The headless engine.
 * @returns The `FacetManager` controller instance.
 *
 * @group Controllers
 * @category FacetManager
 */
export declare function buildCoreFacetManager(engine: CoreEngine): FacetManager;