import { Interceptors } from './middleware/Interceptors';
import { RequestHeader, RequestHeaders, ResponseWrapper } from '../../types/request.types';
import { WithRequired } from '../../types';
import { AbstractEndpoint } from '../endpoint/AbstractEndpoint';
import { ClientConfig, ClientOptions, ClientRequest, EndpointPath, EndpointResponse, EndpointResponseBody, PaginatedEndpointResponse, Options, OptionsWithBody, OptionsWithoutBody } from './AbstractClient.types';

export declare const BASE_URL = "https://api.myparcel.nl";
export declare abstract class AbstractClient {
    /**
     * Interceptors for request and response.
     *
     * @protected
     */
    interceptors: {
        request: Interceptors<OptionsWithBody<AbstractEndpoint> | OptionsWithoutBody<AbstractEndpoint>>;
        response: Interceptors<ResponseWrapper<EndpointResponseBody<AbstractEndpoint>>>;
    };
    /**
     * Executes the request. Should return a promise containing the response json as object.
     */
    protected abstract request: ClientRequest;
    /**
     * Base URL to make requests to.
     *
     * @protected
     */
    protected baseUrl: string;
    /**
     * Headers to use with requests.
     *
     * @protected
     */
    protected headers: RequestHeaders;
    /**
     * @protected
     */
    protected parameters: Record<string, string>;
    /**
     * Additional client specific options.
     *
     * @protected
     */
    protected options: ClientOptions;
    /**
     * Array of headers that are required. Client will throw an error if any are missing.
     *
     * @private
     */
    private _requiredHeaders;
    protected constructor(config?: ClientConfig);
    get requiredHeaders(): (RequestHeader | string)[];
    set requiredHeaders(value: (RequestHeader | string)[]);
    /**
     * Prepare and execute the final request and handle the response.
     */
    doRequest<E extends AbstractEndpoint>(endpoint: E, options: Options<E>): Promise<EndpointResponse<E>>;
    getResponseBody<E extends AbstractEndpoint>(endpoint: E, response: EndpointResponse<E>): EndpointResponse<E> | PaginatedEndpointResponse<E>;
    /**
     * Gets default and custom headers.
     *
     * @protected
     */
    protected getHeaders(): RequestHeaders;
    /**
     * Uses the base url, endpoint and options to create the final request url.
     *
     * @protected
     */
    protected createUrl<E extends AbstractEndpoint>(endpoint: E, options: Options<E>): string;
    /**
     * Replace path variables in an url path. Deletes optional parameters if
     * they're not passed.
     *
     * @protected
     */
    protected substitutePath<E extends AbstractEndpoint>(urlPath: string, pathVariables?: EndpointPath<E>): string;
    /**
     * Validates headers passed in options.
     *
     * @protected
     */
    protected validateHeaders<E extends AbstractEndpoint>(endpoint: E, options: WithRequired<Options<E>, 'headers'>): void;
    /**
     * Executes transformations on options before request.
     *
     * @protected
     */
    protected normalizeOptions<E extends AbstractEndpoint>(endpoint: E, options: Options<E>): WithRequired<Options<E>, 'headers'>;
}