import { Ref } from "vue";
import { ApiResponse, AsyncValue, AsyncLoading, AsyncError, AsyncData, ValyncOptions, Observer, CacheKey, RequestMethod, RequestBody } from "../core/index";
export type ValyncVueOptions<T> = Omit<ValyncOptions<T>, "init"> & {
    init?: Ref<RequestInit>;
};
export type CreateValyncVueOptions = Pick<ValyncOptions<any>, "cache" | "retryCount" | "fetchOnMount"> & {
    headers?: HeadersInit | (() => HeadersInit);
    onError?: (err: {
        name: string;
        message: string;
        code?: number | string;
    }) => boolean | Promise<boolean>;
};
/**
 * createValync creates a custom `useValync` composable bound to a provided HTTP client function.
 * Useful for plugging in your own fetch logic or a library like axios.
 *
 * The `options.onError` callback receives every API-level error. Returning `true` (or a
 * Promise resolving to `true`) triggers a single retry — useful for token-refresh flows.
 *
 * ⚠️ NOTE:
 * Your `client()` function MUST return a Promise resolving to ApiResponse<any>.
 */
export declare function createValync({ client, options: _options, }: {
    client: (url: string, init: RequestInit) => Promise<ApiResponse<any>>;
    options?: CreateValyncVueOptions;
}): <T>(key: CacheKey, options?: ValyncVueOptions<T>) => [Ref<AsyncValue<T>>, (methodOrOpts?: RequestMethod | {
    method?: RequestMethod;
    body?: RequestBody;
    files?: File[] | [string, File][];
}, body?: RequestBody, files?: File[] | [string, File][]) => void, (updater: (prev: T | null) => T) => void, Observer<T>];
/**
 * useValync is a client-side data fetching composable that provides async state management
 * with caching, optimistic updates, and reactive watching support.
 *
 * ⚠️ NOTE:
 * Your server MUST return a JSON response of the shape:
 *
 *    ApiResponse<T> | ApiResponse<any>
 *
 *    {
 *      status: "success" | "failed",
 *      data?: T,
 *      error?: { name: string; message: string; code?: number }
 *    }
 */
export declare function useValync<T>(key: CacheKey, options?: ValyncVueOptions<T>): readonly [Ref<{
    when: <R = undefined>(handlers: import("../core/index").Handler<T, R>) => R;
    unwrap: () => import("ts-results-es").Option<T>;
    unwrapErr: () => import("../core/index").ApiError;
    isLoading: () => this is AsyncLoading;
    isData: () => this is AsyncData<T>;
    isError: () => this is AsyncError;
}, AsyncValue<T> | {
    when: <R = undefined>(handlers: import("../core/index").Handler<T, R>) => R;
    unwrap: () => import("ts-results-es").Option<T>;
    unwrapErr: () => import("../core/index").ApiError;
    isLoading: () => this is AsyncLoading;
    isData: () => this is AsyncData<T>;
    isError: () => this is AsyncError;
}>, (methodOrOpts?: RequestMethod | {
    method?: RequestMethod;
    body?: RequestBody;
    files?: File[] | [string, File][];
}, body?: RequestBody, files?: File[] | [string, File][]) => void, (updater: (prev: T | null) => T) => void, Observer<T>];
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