import { ResponseType } from './constants';
import type { HookErrorFn, HookFn, HookReqFn, HookResFn } from './hook';
import type { RequestBaseOptions, RequestOptions } from './request';
import type { Response, ResponseData } from './response';
import { HookManager, HookName } from './hook';
import type { AuthorizationHeader } from './header';
export declare class Client {
    readonly '@instanceof': symbol;
    defaults: RequestBaseOptions;
    protected headers: Headers;
    protected hookManager: HookManager;
    constructor(input?: RequestBaseOptions);
    /**
     * Return base url
     *
     * @return string
     */
    getBaseURL(): string | undefined;
    /**
     * Overwrite existing base url.
     *
     * @param url
     */
    setBaseURL(url: string): this;
    /**
     * Set a header for all upcoming requests.
     *
     * @param key
     * @param value
     */
    setHeader(key: string, value: any): this;
    /**
     * Get a header for all upcoming requests.
     *
     * @param key
     */
    getHeader(key: string): string | null;
    /**
     * Unset a specific for all upcoming requests.
     *
     * @param key
     */
    unsetHeader(key: string): this;
    /**
     * Unset all defined headers for the upcoming requests.
     */
    unsetHeaders(): this;
    /**
     * Set an authorization header (basic, api-key, bearer).
     *
     * @param options
     */
    setAuthorizationHeader(options: AuthorizationHeader): this;
    /**
     * Get authorization header.
     */
    getAuthorizationHeader(): string | undefined;
    /**
     * Unset an authorization header.
     */
    unsetAuthorizationHeader(): this;
    /**
     * Make a custom request.
     *
     * @param config
     */
    request<T = any, RT extends `${ResponseType}` = `${ResponseType.JSON}`, R = Response<ResponseData<RT, T>>>(config: RequestOptions<RT>): Promise<R>;
    /**
     * Request a resource with the GET method.
     *
     * @param url
     * @param config
     */
    get<T = any, RT extends `${ResponseType}` = `${ResponseType.JSON}`, R = Response<ResponseData<RT, T>>>(url: string, config?: RequestBaseOptions<RT>): Promise<R>;
    /**
     * Delete a resource with the DELETE method.
     *
     * @param url
     * @param config
     */
    delete<T = any, RT extends `${ResponseType}` = `${ResponseType.JSON}`, R = Response<ResponseData<RT, T>>>(url: string, config?: RequestBaseOptions<RT>): Promise<R>;
    /**
     * Make a verification resource with the HEAD method.
     *
     * @param url
     * @param config
     */
    head<T = any, RT extends `${ResponseType}` = `${ResponseType.JSON}`, R = Response<ResponseData<RT, T>>>(url: string, config?: RequestBaseOptions<RT>): Promise<R>;
    /**
     * Create a resource with the POST method.
     *
     * @param url
     * @param body
     * @param config
     */
    post<T = any, RT extends `${ResponseType}` = `${ResponseType.JSON}`, R = Response<ResponseData<RT, T>>>(url: string, body?: any, config?: RequestBaseOptions<RT>): Promise<R>;
    /**
     * Update a resource with the PUT method.
     *
     * @param url
     * @param body
     * @param config
     */
    put<T = any, RT extends `${ResponseType}` = `${ResponseType.JSON}`, R = Response<ResponseData<RT, T>>>(url: string, body?: any, config?: RequestBaseOptions<RT>): Promise<R>;
    /**
     * Update a resource with the PATCH method.
     *
     * @param url
     * @param body
     * @param config
     */
    patch<T = any, RT extends `${ResponseType}` = `${ResponseType.JSON}`, R = Response<ResponseData<RT, T>>>(url: string, body?: any, config?: RequestBaseOptions<RT>): Promise<R>;
    /**
     * Register a hook fn.
     *
     * @param name
     * @param fn
     */
    on(name: `${HookName.REQUEST}`, fn: HookReqFn): number;
    on(name: `${HookName.RESPONSE}`, fn: HookResFn): number;
    on(name: `${HookName.RESPONSE_ERROR}` | `${HookName.REQUEST_ERROR}`, fn: HookErrorFn): number;
    /**
     * Remove single or specific hook fn(s).
     *
     * @param name
     * @param fn
     */
    off(name: `${HookName}`, fn?: HookFn | number): this;
}