import { Reactive } from '../reactive';
import { InjectionProvider } from '../render/app';

export type QueryFn<T> = () => T | Promise<T>;
type QueryState<T, InitialValue extends T | undefined = undefined> = {
    data: Reactive<T | InitialValue>;
    error: Reactive<unknown | undefined>;
    isPending: Reactive<boolean>;
    isFetching: boolean;
};
type QueryClientPrepareResponse<T, InitialValue extends T | undefined> = undefined extends InitialValue ? QueryState<T, undefined> : QueryState<T, InitialValue>;
export declare class QueryClient {
    private keyToState;
    private _id;
    prepare<T, InitialValue extends T | undefined>(queryKey: string, initialValue?: InitialValue): QueryClientPrepareResponse<T, InitialValue>;
    getData<T>(queryFn: QueryFn<T>, queryKey: string): QueryState<any, undefined>;
    reset(): void;
}
export declare function useQuery<T, InitialValue extends T | undefined = undefined>({ queryFn, queryKey, initialValue, }: {
    queryFn: QueryFn<T>;
    queryKey: string;
    initialValue?: InitialValue;
}, injections?: {
    queryClient?: QueryClient;
}): {
    data: Reactive<T | (InitialValue & undefined)> | Reactive<T | InitialValue>;
    error: Reactive<unknown>;
    isPending: Reactive<boolean>;
    execute: () => Promise<void>;
};
export declare const createQueryClientProvider: () => InjectionProvider<QueryClient>;
export {};