import type ApiCaller from '../Contracts/ApiCaller';
import qs from 'qs';
import type { Method, CustomHeaders } from '../Calliope/Concerns/CallsApi';
import type { ApiResponse } from '../Contracts/HandlesApiResponse';
/**
 * The default ApiCaller implementation used by upfrontjs.
 *
 * @link {ApiCaller}
 */
export default class API implements ApiCaller {
    /**
     * Enable indexing object by strings.
     */
    [index: string]: CallableFunction | qs.IStringifyOptions | Record<string, unknown>;
    /**
     * The settings for the parsing of the get parameters.
     *
     * @protected
     *
     * @see https://www.npmjs.com/package/qs
     */
    protected readonly getParamEncodingOptions: qs.IStringifyOptions;
    /**
     * The implementation of the expected call method.
     *
     * @inheritDoc
     */
    call(url: string, method: 'CONNECT' | 'connect' | 'HEAD' | 'head' | 'OPTIONS' | 'options' | 'TRACE' | 'trace', data?: FormData | Record<string, unknown>, customHeaders?: CustomHeaders, queryParameters?: Record<string, unknown>): Promise<ApiResponse & {
        request: {
            method: 'CONNECT' | 'HEAD' | 'OPTIONS' | 'TRACE';
        };
    }>;
    call<T>(url: string, method: Method, data?: FormData | Record<string, unknown>, customHeaders?: CustomHeaders, queryParameters?: Record<string, unknown>): Promise<ApiResponse<T>>;
    /**
     * Prepare/compile the ajax call initialisation.
     *
     * @param {string} url - The endpoint the request goes to.
     * @param {Method} method - The method the request uses.
     * @param {object=} data - The optional data to send with the request.
     * @param {object=} customHeaders - Custom headers to merge into the request.
     * @param {object=} queryParameters - The query parameters to append to the url
     *
     * @return {object}
     *
     * @protected
     */
    protected initConfig(url: string, method: Method, data?: FormData | Record<string, unknown>, customHeaders?: CustomHeaders, queryParameters?: Record<string, unknown>): Promise<{
        url: string;
        requestInit: RequestInit;
    }>;
}
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