import { HttpClient } from '@angular/common/http';
import { HttpAdapter, HttpRequest, HttpResponse } from '@nauth-toolkit/client';
import * as i0 from "@angular/core";
/**
 * HTTP adapter for Angular using HttpClient.
 *
 * This adapter:
 * - Uses Angular's HttpClient for all requests
 * - Works with Angular's HTTP interceptors (including authInterceptor)
 * - Auto-provided via Angular DI (providedIn: 'root')
 * - Converts HttpClient responses to HttpResponse format
 * - Converts HttpErrorResponse to NAuthClientError
 *
 * Users don't need to configure this manually - it's automatically
 * injected when using AuthService in Angular apps.
 *
 * @example
 * ```typescript
 * // Automatic usage (no manual setup needed)
 * // AuthService automatically injects AngularHttpAdapter
 * constructor(private auth: AuthService) {}
 * ```
 */
export declare class AngularHttpAdapter implements HttpAdapter {
    private readonly http;
    constructor(http: HttpClient);
    /**
     * Safely parse a JSON response body.
     *
     * Angular's fetch backend (`withFetch()`) will throw a raw `SyntaxError` if
     * `responseType: 'json'` is used and the backend returns HTML (common for
     * proxies, 502 pages, SSR fallbacks, or misrouted requests).
     *
     * To avoid crashing consumer apps, we always request as text and then parse
     * JSON only when the response actually looks like JSON.
     *
     * @param bodyText - Raw response body as text
     * @param contentType - Content-Type header value (if available)
     * @returns Parsed JSON value (unknown)
     * @throws {SyntaxError} When body is non-empty but not valid JSON
     */
    private parseJsonBody;
    /**
     * Execute HTTP request using Angular's HttpClient.
     *
     * @param config - Request configuration
     * @returns Response with parsed data
     * @throws NAuthClientError if request fails
     */
    request<T>(config: HttpRequest): Promise<HttpResponse<T>>;
    static ɵfac: i0.ɵɵFactoryDeclaration<AngularHttpAdapter, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<AngularHttpAdapter>;
}