import type { QueryKey, QueryOptions, QueryState, QueryClientOptions } from "./types.js";
import { QueryCache } from "./query-cache.js";
export declare class QueryClient {
    private cache;
    private defaultOptions?;
    constructor(options?: QueryClientOptions);
    /**
     * Gets cached query data.
     */
    getQueryData<TData = unknown>(queryKey: QueryKey): TData | undefined;
    /**
     * Sets query data directly in the cache.
     */
    setQueryData<TData = unknown>(queryKey: QueryKey, data: TData): void;
    /**
     * Gets query state.
     */
    getQueryState<TData = unknown, TError = Error>(queryKey: QueryKey): QueryState<TData, TError> | undefined;
    /**
     * Invalidates queries matching the given key.
     */
    invalidateQueries(queryKey: QueryKey): void;
    /**
     * Refetches queries matching the given key.
     */
    refetchQueries(queryKey: QueryKey): Promise<void>;
    /**
     * Fetches a query and updates the cache.
     */
    fetchQuery<TData = unknown, TError = Error>(queryKey: QueryKey, queryFn: () => Promise<TData>, options?: Partial<QueryOptions<TData, TError>>): Promise<TData>;
    /**
     * Executes a query with retry logic and error handling.
     */
    private executeQuery;
    /**
     * Updates query state and notifies subscribers.
     */
    private updateQueryState;
    /**
     * Clears all queries from the cache.
     */
    clear(): void;
    /**
     * Gets the internal cache (for testing).
     */
    getCache(): QueryCache;
    /**
     * Gets default options.
     */
    getDefaultOptions(): {
        queries?: Partial<Omit<QueryOptions, "queryKey" | "queryFn">>;
    } | undefined;
}
/**
 * Creates a new QueryClient instance.
 */
export declare function createQueryClient(options?: QueryClientOptions): QueryClient;
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