#include <QApplication>
#include <QtSql>
#include <QMessageBox>
#include <QTextStream>
#include <QFile>
#include <QFont>
#include <QSharedMemory>


#include "window.h"
#include "services.h"
#include "database.h"


int main(int argc,char* argv[])
{
   Q_INIT_RESOURCE(gui);
   QApplication app(argc,argv);
   
   //QApplication::setFont(QFont("Tahoma"));   

        qint64 processId = app.applicationPid();

        QSharedMemory sharedMemory;
        Services services;

        sharedMemory.setKey("pid");

        // trying to create a shared memory segment
        if(!sharedMemory.create(sizeof(processId)))
        {
        // if the segment already exists (an instance of the application is already running)
            if(sharedMemory.error() == QSharedMemory::AlreadyExists)
            {
                if(sharedMemory.attach(QSharedMemory::ReadOnly))
                {
                    // we save data of the first instance
                    sharedMemory.lock();
                    qint64 p = *(qint64 *)sharedMemory.constData();
                    sharedMemory.unlock();

                    // calling QMessageBox::critical, we can't calling it in main (main dosn't support UTF-8)
                    services.notSingle();
                    return 1;
                }

            }
            else
            {
                // error ...
                qDebug() << sharedMemory.errorString();
            }

        }
        else
        {
            // first run of application, we save the ID
            sharedMemory.lock();
            memcpy(sharedMemory.data(), &processId, sharedMemory.size());
            sharedMemory.unlock();
        }


   Database db;

   // check if another instance of program run in memory.
        /*if( !services.isSignle() )
                return false;*/
   
   // load style sheet
   services.loadStyleSheet("style");
   
   // check availability of place_settings file.
   if( !services.createPlaceSettingsFile() )
      return false;

   // check availability of program_settings file.
   if( !services.createProgramSettingsFile() )
      return false;
   
   // check availability of Database file.
   if( !db.checkDatabase() )
      return false;

   // connect to SQLite database.
   if( !db.makeConnection() )
      return false;

   
   // Create Almoathen Object and pass to it the initial(Previous) configuration.

   Window Almoathen(services.readPlaceSettingsFile());
   Almoathen.show();
   
   Almoathen.setFixedSize(QSize(320,366));
   
   return app.exec();
}

void Services::notSingle()
{
    QMessageBox::critical(0,QObject::trUtf8("خطأ في التشغيل"),QObject::trUtf8("يوجد نسخة من البرنامج تعمل حاليا ، لا تستطيع تشغيل اكثر من نسخة واحدة"),QMessageBox::Close);


}