import { BehaviorSubject } from 'rxjs';
import { Quiz, QuizStatus } from './shared/models/quiz';
import { Report } from './shared/models/report';
import { AnswerData } from './shared/models/answer';
import { QuestionDirection } from './shared/models/question';
import * as i0 from "@angular/core";
export declare class NgxQuizService {
    private quiz;
    quizReport: Report;
    quizStatus$: BehaviorSubject<QuizStatus>;
    index$: BehaviorSubject<number>;
    constructor();
    initQuiz(quiz: Quiz): void;
    overrideInitialStage(): void;
    manageQuestionIndex(direction: QuestionDirection): void;
    previousQuestion(): void;
    nextQuestion(): void;
    answerQuestion(answerData: AnswerData): void;
    startQuiz(): void;
    restartQuiz(): void;
    saveProgress(answerData: AnswerData): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<NgxQuizService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<NgxQuizService>;
}