/*
* Original Author : Garuda Linux & Team.
* Thanks for developing this application.
* love from Bangladesh
*/

/*
* preprocessor directives: ensures that the contents of the file are only included once in a translation unit, 
* preventing multiple inclusions and potential naming conflicts
*/
#ifndef SNIGDHAOSASSISTANT_H
#define SNIGDHAOSASSISTANT_H

/*class for main application windows*/
#include <QMainWindow> 
/*abstract base class for buttons*/
#include <QAbstractButton>
/*class for managing network operations*/
#include <QtNetwork/QNetworkAccessManager>

/*
* defines a namespace for the user interface of the application, typically generated by Qt Designer. 
* QT_BEGIN_NAMESPACE and QT_END_NAMESPACE are macros used to enclose the Qt namespace.
*/
QT_BEGIN_NAMESPACE
namespace Ui {
class SnigdhaOSAssistant;
}
QT_END_NAMESPACE

/*
* declares a class named SnigdhaOSAssistant, which inherits from QMainWindow. 
* the Q_OBJECT macro is used to enable the Qt's meta-object system for this class, 
* allowing features like signals and slots.
*/
class SnigdhaOSAssistant : public QMainWindow
{
    Q_OBJECT

/*
* declares an enumeration type named State inside the SnigdhaOSAssistant class,
* containing various states that the application can be in.
*/
public:
    enum class State {
        QUIT,
        WELCOME,
        INTERNET,
        UPDATE,
        UPDATE_RETRY,
        // NVIDIA_CHECK,
        // NVIDIA,
        // NVIDIA_APPLY,
        SELECT,
        APPLY,
        APPLY_RETRY,
        SUCCESS
    };

    /*
    * constructor and destructor declarations for the SnigdhaOSAssistant class. 
    * the constructor takes a QWidget pointer as the parent widget and a QString representing 
    * the initial state of the application. 
    * the destructor has no parameters.
    */
    SnigdhaOSAssistant(QWidget* parent = nullptr, QString state = "WELCOME");
    ~SnigdhaOSAssistant();

/*
* declare private slots, which are functions that can be connected to signals from widgets
*/
private slots:
    void on_textWidget_buttonBox_clicked(QAbstractButton* button);
    void on_selectWidget_buttonBox_clicked(QAbstractButton* button);

/*
* These are private member variables of the SnigdhaOSAssistant class. 
* ui is a pointer to the user interface object generated by Qt Designer. 
* executable_modify_date is a QDateTime object representing the modification date of the executable. 
* currentState is an instance of the State enumeration representing the current state of the application.
*/
private:
    Ui::SnigdhaOSAssistant *ui;
    QDateTime executable_modify_date;
    State currentState;
    /*
    * private member functions of the SnigdhaOSAssistant class. 
    * they perform various tasks such as making internet requests, 
    * updating the application, populating select widgets, 
    * updating the application state, and relaunching the application.
    */
    void doInternetUpRequest();
    void doUpdate();
    void doApply();
    // void doNvidiaCheck();
    // void doNvidiaApply();
    void populateSelectWidget();
    void populateSelectWidget(QString filename, QString label);
    void updateState(State state);
    void updateState(QString state);
    void relaunchSelf(QString param);
};
#endif // SNIGDHAOSASSISTANT_H