import { ApiDocument, type URLSearchParamsInit } from '@opra/common';
import type { StrictOmit } from 'ts-gems';
import { kBackend } from './constants.js';
import { HttpBackend } from './http-backend.js';
import { HttpBundleObservable } from './http-bundle-observable.js';
import { HttpRequestObservable } from './http-request-observable.js';
/**
 * Namespace for {@link OpraClientBase} related types and interfaces.
 *
 * @namespace OpraClientBase
 */
export declare namespace OpraClientBase {
    /** Configuration options for OpraClientBase */
    interface Options {
        /** The API document associated with this client */
        document?: ApiDocument;
    }
    /** Generic request options for OPRA client */
    type RequestOptions = Partial<StrictOmit<HttpBackend.RequestInit, 'url'>> & {
        /** URL parameters */
        params?: URLSearchParamsInit;
    };
}
/**
 * Base class for OPRA HTTP clients.
 *
 * @class OpraClientBase
 * @abstract
 */
export declare abstract class HttpClientBase<TRequestOptions = {}, TResponseExt = {}> {
    protected [kBackend]: HttpBackend;
    /**
     * Creates a new instance of HttpClientBase.
     *
     * @param backend The backend instance to use for requests.
     * @protected
     */
    protected constructor(backend: HttpBackend);
    /**
     * Gets the base service URL.
     */
    get serviceUrl(): string;
    /**
     * Fetches the API document from the service.
     *
     * @param options Fetch options.
     * @returns A promise that resolves to an ApiDocument.
     * @throws {@link Error} if there is an issue fetching or parsing the document.
     */
    fetchDocument(options?: {
        documentId?: string;
    }): Promise<ApiDocument>;
    /**
     * Creates a new {@link HttpRequestObservable} for a specific path.
     *
     * @param path The path of the request.
     * @param options Request options.
     * @returns A new HttpRequestObservable instance.
     */
    request<TBody = any>(path: string, options?: OpraClientBase.RequestOptions): HttpRequestObservable<TBody, TBody, TRequestOptions, TResponseExt>;
    /**
     * Sends a DELETE request.
     *
     * @param path The path of the request.
     * @param options Request options.
     * @returns A new HttpRequestObservable instance.
     */
    delete<TBody = any>(path: string, options?: StrictOmit<OpraClientBase.RequestOptions, 'method' | 'body'>): HttpRequestObservable<TBody, TBody, TRequestOptions, TResponseExt>;
    /**
     * Sends a GET request.
     *
     * @param path The path of the request.
     * @param options Request options.
     * @returns A new HttpRequestObservable instance.
     */
    get<TBody = any>(path: string, options?: StrictOmit<OpraClientBase.RequestOptions, 'method' | 'body'>): HttpRequestObservable<TBody, TBody, TRequestOptions, TResponseExt>;
    /**
     * Sends a PATCH request.
     *
     * @param path The path of the request.
     * @param requestBody The request body.
     * @param options Request options.
     * @returns A new HttpRequestObservable instance.
     */
    patch<TBody = any>(path: string, requestBody: any, options?: StrictOmit<OpraClientBase.RequestOptions, 'method' | 'body'>): HttpRequestObservable<TBody, TBody, TRequestOptions, TResponseExt>;
    /**
     * Sends a POST request.
     *
     * @param path The path of the request.
     * @param requestBody The request body.
     * @param options Request options.
     * @returns A new HttpRequestObservable instance.
     */
    post<TBody = any>(path: string, requestBody: any, options?: StrictOmit<OpraClientBase.RequestOptions, 'method' | 'body'>): HttpRequestObservable<TBody, TBody, TRequestOptions, TResponseExt>;
    /**
     * Sends a PUT request.
     *
     * @param path The path of the request.
     * @param requestBody The request body.
     * @param options Request options.
     * @returns A new HttpRequestObservable instance.
     */
    put<TBody = any>(path: string, requestBody: any, options?: StrictOmit<OpraClientBase.RequestOptions, 'method' | 'body'>): HttpRequestObservable<TBody, TBody, TRequestOptions, TResponseExt>;
    /**
     * Bundles multiple requests into a single multipart HTTP request and
     * distributes the parsed sub-responses back to callers.
     *
     * @param requests The list of requests to bundle.
     * @returns A {@link HttpBundleObservable} that emits an ordered array of {@link HttpResponse}.
     */
    bundle(requests: HttpRequestObservable<any>[]): HttpBundleObservable;
    /**
     * Executes a transaction composed of multiple HTTP requests.
     *
     * @param {HttpRequestObservable<any>[]} requests - An array of HTTP request observables that are part of the transaction.
     * @return {HttpBundleObservable} A new observable that represents the bundled transaction.
     */
    transaction(requests: HttpRequestObservable<any>[]): HttpBundleObservable;
}