import { HttpHeaders, HttpParams, HttpContext, HttpClient } from '@angular/common/http';
import { Observable } from 'rxjs';
import * as i0 from '@angular/core';

interface SseRequestOptions {
    body?: any;
    headers?: HttpHeaders | {
        [header: string]: string | string[];
    };
    params?: HttpParams | {
        [param: string]: string | string[];
    };
    context?: HttpContext;
    withCredentials?: boolean;
}
declare const defaultRequestOptions: {
    observe: string;
    reportProgress: boolean;
    responseType: string;
};

declare class SseClient {
    private httpClient;
    constructor(httpClient: HttpClient);
    /**
     * Constructs a request which listen to the SSE and interprets the data as
     * events and returns the full event stream.
     *
     * @param url the endpoint URL.
     * @param options an object of `SseOption`
     * @param requestOptions the HTTP options to send with the request.
     * @param method the HTTP method
     *
     * @returns an observable of all events for the request, with the response body of type `Event`.
     */
    stream(url: string, options?: {
        keepAlive?: boolean;
        reconnectionDelay?: number;
        responseType?: 'event';
    }, requestOptions?: SseRequestOptions, method?: string): Observable<Event>;
    /**
     * Constructs a request which listen to the SSE and interprets the data as a
     * string text and returns the full event stream.
     *
     * @param url the endpoint URL.
     * @param options an object of `SseOption`
     * @param requestOptions the HTTP options to send with the request.
     * @param method the HTTP method
     *
     * @returns an observable of all events for the request, with the response body of type string.
     */
    stream(url: string, options?: {
        keepAlive?: boolean;
        reconnectionDelay?: number;
        responseType?: 'text';
    }, requestOptions?: SseRequestOptions, method?: string): Observable<string>;
    static ɵfac: i0.ɵɵFactoryDeclaration<SseClient, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<SseClient>;
}

interface SseErrorEvent extends ErrorEvent {
    /**
     * HTTP status code from the request error.
     */
    status?: number;
    /**
     * HTTP status text from the request error.
     */
    statusText?: string;
}

interface SseOptions {
    /**
     * `true` to automatically reconnect when the request is closed by an request
     * error (including timeout errors) or completed.
     *
     * In this case, to close the connection is necessary to unsubscribe manually.
     *
     * @default `true`
     */
    keepAlive: boolean;
    /**
     * Delay before reconnecting with the server, this is only useful when
     * `keepAlive` is `true`.
     *
     * @default `3000`
     */
    reconnectionDelay: number;
    /**
     * Defines the response type.
     *
     * When set to `event` a `MessageEvent` will be returned with the data and a
     * default `Event` with type error in case of erros.
     *
     * When set to `text` only the message data will be returned. In this case no
     * errors will be returned, only the data from successful requests.
     *
     * @default `text`
     */
    responseType: 'event' | 'text';
}
declare const defaultSseOptions: SseOptions;

export { SseClient, defaultRequestOptions, defaultSseOptions };
export type { SseErrorEvent, SseOptions, SseRequestOptions };