#ifndef QUESTIONWIDGET_H
#define QUESTIONWIDGET_H

#include "base_widget.h"
#include <QWidget>
#include <QLabel>
#include <QRadioButton>
#include <QPushButton>
#include <QButtonGroup>
#include <QVBoxLayout>
#include <vector>
#include "../shared/backend_interface.h"

class QuestionWidget : public BaseWidget {
    Q_OBJECT

public:
    explicit QuestionWidget(exam_system::BackendInterface* backend, QWidget* parent = nullptr);
    void startTest(const QString& difficulty, int questionCount);

signals:
    void testCompleted(const exam_system::TestResult& result);

private slots:
    void onNextClicked();
    void onSubmitClicked();
    void onPrevClicked();  
    void onOptionSelected();  

private:
    void setupUI() override;
    void showQuestion(int index);
    void updateProgress();
    void updateButtonStates();  
    bool isCurrentQuestionAnswered(); 

    std::vector<exam_system::QuestionInfo> questions_;
    std::vector<int> user_answers_;
    int current_question_ = 0;
    
    QLabel* questionLabel;
    QLabel* progressLabel;
    QButtonGroup* optionGroup;
    QRadioButton* optionButtons[4];
    QPushButton* nextBtn;
    QPushButton* prevBtn;
    QPushButton* submitBtn;
};

#endif