import React from "react";
import type { History as HHistory } from "history";
import { Facets, SortParam, SearchParams } from "./url_utils";
export * from "./constants";
export * from "./url_utils";
export { buildSearchQuery, SearchQueryParams } from "./search";
export interface Bucket {
    key: string;
    doc_count: number;
}
export declare type Aggregation = {
    doc_count_error_upper_bound?: number;
    sum_other_doc_count?: number;
    buckets: Bucket[];
};
export declare type Aggregations = Map<string, Aggregation>;
export declare type GetSearchPageSize = (ui: string | null) => number;
export declare const mergeFacetResults: (...args: Aggregation[]) => Aggregation;
export declare const useFacetOptions: (aggregations: Aggregations, activeFacets: Facets) => (group: string) => Aggregation | null;
declare type UseSearchInputsResult = {
    /**
     * Parameters to be used for a search query.
     *
     * Typically, these are the parameters of the previous search query. Thus,
     * `searchParams.text` may be different from `text` if the has typed new text
     * without submitting the search.
     */
    searchParams: SearchParams;
    setSearchParams: React.Dispatch<React.SetStateAction<SearchParams>>;
    /**
     * `text` displayed in the UI.
     *
     * May be different from `searchParams.text` if user has typed new text
     * without submitting the search.
     */
    text: string;
    setText: (text: string) => void;
    /**
     * Reset `searchParams` and `text`.
     */
    clearAllFilters: () => void;
    /**
     * Toggle a single facet; also sets text -> searchParams.text.
     */
    toggleFacet: (name: string, value: string, isEnbaled: boolean) => void;
    /**
     * Toggle multiple facets; also sets text -> searchParams.text.
     */
    toggleFacets: (facets: [string, string, boolean][]) => void;
    /**
     * Event handler for toggling a single facet; also sets text -> searchParams.text.
     */
    onUpdateFacet: ({ target }: {
        target: Pick<HTMLInputElement, "value" | "checked" | "name">;
    }) => void;
    /**
     * Input handler for updating `text` (des NOT update `searchParams.text`).
     */
    updateText: (event: {
        target: {
            value: string;
        };
    }) => void;
    /**
     * Event handler for clearing `text`; also clears searchParams.text.
     */
    clearText: () => void;
    /**
     * Event handler for updating `searchParams.sort`; also sets text -> searchParams.text.
     */
    updateSort: (event: {
        target: {
            value: string;
        };
    }) => void;
    /**
     * Updates `searchParams.sort`; also sets text -> searchParams.text.
     */
    updateUI: (newUI: string | null) => void;
    /**
     * Set `searchParams.text` to the current value of `text`.
     */
    submitText: () => void;
};
/**
 * Provides state and event handlers for learning resources search UI; state
 * includes data for facets, query text, sort order, ui variant (e.g.,
 * 'compact').
 *
 * Note that there are two different state values for search text, `text` and
 * `searchParams.text`. In the typical setup:
 *  - `text` represents the text currently displayed in the UI and updates
 *    frequently (e.g., on every keypress).
 *  - `searchParams.text` represents the text used for the currently displayed
 *     search results and updates less often (e.g., when a user presses "submit"
 *     or on debounced keypresses).
 *
 * The provided event handlers for updating other search parameters (sort, ui,
 * facets) sync `text` -> `searchParams.text`.
 */
export declare const useSearchInputs: (history: HHistory) => UseSearchInputsResult;
/**
 * Sync changes to URL search parameters with `searchParams`, and vice versa.
 *
 * Pushes a new entry to the history stack every time the URL would change.
 */
export declare const useSyncUrlAndSearch: (history: HHistory, { searchParams, setSearchParams, setText }: Pick<UseSearchInputsResult, "searchParams" | "setSearchParams" | "setText">) => void;
interface PreventableEvent {
    preventDefault?: () => void;
    type?: string;
}
interface CourseSearchResult {
    facetOptions: (group: string) => Aggregation | null;
    clearAllFilters: UseSearchInputsResult["clearAllFilters"];
    toggleFacet: UseSearchInputsResult["toggleFacet"];
    toggleFacets: UseSearchInputsResult["toggleFacets"];
    onUpdateFacets: UseSearchInputsResult["onUpdateFacet"];
    updateText: UseSearchInputsResult["updateText"];
    clearText: React.MouseEventHandler;
    updateSort: UseSearchInputsResult["updateSort"];
    acceptSuggestion: (suggestion: string) => void;
    loadMore: () => void;
    incremental: boolean;
    text: string;
    sort: SortParam | null;
    activeFacets: Facets;
    /**
     * Callback that handles search submission. Pass this to your search input
     * submission event target, e.g., `<form onSubmit={onSubmit} />` or
     * `<button onClick={onSubmit} />`.
     *
     * The event target does not need to emit submit events, but if it does, the
     * default form action will be prevented.
     */
    onSubmit: (e: PreventableEvent) => void;
    from: number;
    updateUI: (newUI: string | null) => void;
    ui: string | null;
}
export declare const useCourseSearch: (runSearch: (text: string, searchFacets: Facets, nextFrom: number, sort?: SortParam | null, ui?: string | null) => Promise<void>, clearSearch: () => void, aggregations: Aggregations, loaded: boolean, searchPageSize: number | GetSearchPageSize, history: HHistory) => CourseSearchResult;