import { HttpClient } from '@angular/common/http';
import { Observable } from 'rxjs';
import { IFaqCategoryWithItemsVm } from '../models/faq-category-vm.model';
import * as i0 from "@angular/core";
export declare class FaqService {
    private http;
    private apiUrl;
    private readonly baseUrl;
    /** Cached FAQ responses keyed by language so we fetch each language at most once. */
    private readonly cache;
    constructor(http: HttpClient, apiUrl: string);
    get(acceptLanguage?: string): Observable<IFaqCategoryWithItemsVm[]>;
    /** Pre-fetch and cache FAQ for a language ahead of opening the modal. */
    preload(acceptLanguage?: string): void;
    /** Drop cached data so the next get() re-fetches from the server. */
    clearCache(acceptLanguage?: string): void;
    private request;
    private createHeaders;
    static ɵfac: i0.ɵɵFactoryDeclaration<FaqService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<FaqService>;
}