import type { ReactElement, ReactNode } from "react";
import { ItemStore } from "../db/ItemStore.js";
import type { AbstractProvider } from "../db/Provider.js";
import { QueryStore } from "../db/QueryStore.js";
import type { DataKey, Database } from "../util/data.js";
import type { ItemQuery } from "../util/item.js";
import type { Optional } from "../util/optional.js";
export interface DataContext<T extends Database> {
    /** Get an `ItemStore` for the specified collection item in the current `DataProvider` context and subscribe to any changes in it. */
    useItem<K extends DataKey<T>>(this: void, collection: K, id: string): ItemStore<T, K>;
    useItem<K extends DataKey<T>>(this: void, collection: Optional<K>, id: Optional<string>): ItemStore<T, K> | undefined;
    /** Get an `QueryStore` for the specified collection query in the current `DataProvider` context and subscribe to any changes in it. */
    useQuery<K extends DataKey<T>>(this: void, collection: K, query: ItemQuery<T[K]>): QueryStore<T, K>;
    useQuery<K extends DataKey<T>>(this: void, collection: Optional<K>, query: Optional<ItemQuery<T[K]>>): QueryStore<T, K> | undefined;
    readonly DataContext: ({ children }: {
        children: ReactNode;
    }) => ReactElement;
}
/**
 * Create a data context
 * - Allows React elements to call `useItem()` and `useQuery()` to access items/queries in a database provider.
 * - If the database has a `CacheProvider` in its chain then in-memory data will be used in the returned stores.
 */
export declare function createDataContext<T extends Database>(provider: AbstractProvider<T>): DataContext<T>;