#include "mainwindow.h"
#include "./ui_mainwindow.h"

#include <QCloseEvent>

#include "data/settingshandler.h"
#include "genericcore.h"

MainWindow::MainWindow(QWidget* parent)
    : QMainWindow(parent)
    , ui(new Ui::MainWindow) {
  ui->setupUi(this);

  m_core = new GenericCore();

  /// application icon
  const QString iconString = "://feature.png";
#ifdef QT_DEBUG
  QPixmap pixmap       = QPixmap(iconString);
  QTransform transform = QTransform();
  transform.rotate(180);
  QPixmap rotated = pixmap.transformed(transform);
  setWindowIcon(QIcon(rotated));
#else
  setWindowIcon(QIcon(iconString));
#endif

  /// TODO restore window geometry and state (& save it in closeEvent)
  const QVariantMap settings = SettingsHandler::getSettings("GUI");
  restoreGeometry(settings.value("geometry").toByteArray());
  restoreState(settings.value("windowState").toByteArray());

  connect(m_core, &GenericCore::displayStatusMessage, this, &MainWindow::displayStatusMessage);
  connect(this, &MainWindow::displayStatusMessage, this, &MainWindow::showStatusMessage);
}

MainWindow::~MainWindow() {
  delete ui;
  delete m_core;
}

void MainWindow::on_pushButton_clicked() {
  const QString prefix("Backend provided by: ");
  ui->label->setText(prefix + m_core->toString());
}

void MainWindow::showStatusMessage(const QString text) {
  qInfo() << text;
  ui->statusbar->showMessage(text);
}

void MainWindow::closeEvent(QCloseEvent* event) {
  if (isWindowModified()) {
    QMessageBox msgBox;
    msgBox.setWindowTitle(windowTitle() + " - Save dialog");
    msgBox.setText("The document has been modified.");
    msgBox.setInformativeText("Do you want to save your changes?");
    msgBox.setStandardButtons(QMessageBox::Save | QMessageBox::Discard | QMessageBox::Cancel);
    msgBox.setDefaultButton(QMessageBox::Save);
    int ret = msgBox.exec();

    switch (ret) {
      case QMessageBox::Save:
        // TODO m_core->saveItems();
        event->accept();
        break;
      case QMessageBox::Discard:
        event->accept();
        break;
      case QMessageBox::Cancel:
        event->ignore();
        break;
      default:
        /// should never be reached
        qCritical() << "unexpected switch case in closeEvent:" << ret;
        event->ignore();
        break;
    }
  } else {
    event->accept();
  }

  if (event->isAccepted()) {
    qInfo() << "Saving GUI settings...";
    SettingsHandler::saveSettings({{"geometry", saveGeometry()}, {"windowState", saveState()}},
                                  "GUI");
  }
}