#include "SystemWindow.h"
#include "ui_SystemWindow.h"

#include "LSession.h"
#include <LuminaOS.h>
#include <QPoint>
#include <QCursor>
#include <QDebug>
#include <QProcess>
#include <QDesktopWidget>
#include <QMessageBox>

SystemWindow::SystemWindow() : QDialog(), ui(new Ui::SystemWindow){
  ui->setupUi(this); //load the designer file
  //Setup the window flags
  this->setWindowFlags( Qt::Tool | Qt::FramelessWindowHint | Qt::WindowStaysOnTopHint);
  //Setup the icons based on the current theme
  ui->tool_logout->setIcon( LXDG::findIcon("system-log-out","") );
  ui->tool_restart->setIcon( LXDG::findIcon("system-reboot","") );
  ui->tool_shutdown->setIcon( LXDG::findIcon("system-shutdown","") );
  ui->tool_suspend->setIcon( LXDG::findIcon("system-suspend","") );
  ui->push_cancel->setIcon( LXDG::findIcon("dialog-cancel","") );
  ui->push_lock->setIcon( LXDG::findIcon("system-lock-screen","") );
  //Connect the signals/slots
  connect(ui->tool_logout, SIGNAL(clicked()), this, SLOT(sysLogout()) );
  connect(ui->tool_restart, SIGNAL(clicked()), this, SLOT(sysRestart()) );
  connect(ui->tool_shutdown, SIGNAL(clicked()), this, SLOT(sysShutdown()) );
  connect(ui->tool_suspend, SIGNAL(clicked()), this, SLOT(sysSuspend()) );
  connect(ui->push_cancel, SIGNAL(clicked()), this, SLOT(sysCancel()) );
  connect(ui->push_lock, SIGNAL(clicked()), this, SLOT(sysLock()) );
  //Disable buttons if necessary
  updateWindow();
  ui->tool_suspend->setVisible(LOS::systemCanSuspend()); //does not change with time - just do a single check
  connect(QApplication::instance(), SIGNAL(LocaleChanged()), this, SLOT(updateWindow()) );
  connect(QApplication::instance(), SIGNAL(IconThemeChanged()), this, SLOT(updateWindow()) );
}

SystemWindow::~SystemWindow(){

}

void SystemWindow::updateWindow(){
  //Disable the shutdown/restart buttons if necessary
  ui->retranslateUi(this);
  bool ok = LOS::userHasShutdownAccess();
    ui->tool_restart->setEnabled(ok);
    ui->tool_shutdown->setEnabled(ok);
  //Center this window on the current screen
  QPoint center = QApplication::desktop()->screenGeometry(QCursor::pos()).center(); //get the center of the current screen
  this->move(center.x() - this->width()/2, center.y() - this->height()/2);
}

bool SystemWindow::promptAboutUpdates(bool &skip){
  QString pending = LOS::systemPendingUpdates();
  if(pending.isEmpty()){ skip = false; } //continue without skip
  else{
    QMessageBox dlg(QMessageBox::Question, tr("Apply Updates?"), tr("You have system updates waiting to be applied! Do you wish to install them now?"), QMessageBox::Yes | QMessageBox::No | QMessageBox::Cancel, this);
      dlg.setButtonText(QMessageBox::Yes, tr("Yes"));
      dlg.setButtonText(QMessageBox::No, tr("No"));
      dlg.setButtonText(QMessageBox::Cancel, tr("Cancel"));
      dlg.setDetailedText(pending);
      dlg.setDefaultButton(QMessageBox::Yes);
      dlg.show();
    int ret = dlg.exec();
    if(ret == QMessageBox::Cancel){ return false; } //do not continue
    else{ skip = (ret==QMessageBox::No); }
  }
  return true;
}

void SystemWindow::sysLogout(){
  this->close();
  LSession::processEvents();
  QTimer::singleShot(0, LSession::handle(), SLOT(StartLogout()) );
}
	
void SystemWindow::sysRestart(){
  bool skip = false;
  if(!promptAboutUpdates(skip)){ this->close(); return; } //cancelled
  this->close();
  LSession::processEvents();
  LSession::handle()->StartReboot(skip);
}
	
void SystemWindow::sysShutdown(){
  bool skip = false;
  if(!promptAboutUpdates(skip)){ this->close(); return; } //cancelled
  this->close();
  LSession::processEvents();
  LSession::handle()->StartShutdown(skip);
}

void SystemWindow::sysSuspend(){
  this->hide();
  LSession::processEvents();
  //Make sure to lock the system first (otherwise anybody can access it again)
  LUtils::runCmd("xscreensaver-command -lock");
  //Now suspend the system
  LOS::systemSuspend();
}

void SystemWindow::sysLock(){
  this->hide();
  LSession::processEvents();
  qDebug() << "Locking the desktop...";
  QProcess::startDetached("xscreensaver-command -lock");
}