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

#include <QCloseEvent>
#include <QMessageBox>

#include "../../ApplicationConfig.h"
#include "Dialogs/newitemdialog.h"
#include "data/settingshandler.h"
#include "genericcore.h"
#include "model/tablemodel.h"

static QString updateTextClean = "Do you want to update the application now?";
static QString updateTextDirty = "Do you want to save the tasks & update the application now?";

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

  m_core = std::make_unique<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

  const QVariantMap settings = SettingsHandler::getSettings("GUI");
  restoreGeometry(settings.value("geometry").toByteArray());
  restoreState(settings.value("windowState").toByteArray());

  m_tableModel = m_core->getModel();
  ui->tableView->setModel(m_tableModel.get());

  createActions();
  createHelpMenu();
  createGuiDialogs();

  connect(m_core.get(), &GenericCore::displayStatusMessage, this,
          &MainWindow::displayStatusMessage);
  connect(this, &MainWindow::displayStatusMessage, this, &MainWindow::showStatusMessage);
  connect(this, &MainWindow::checkForUpdates, this,
          &MainWindow::on_actionCheck_for_update_triggered, Qt::QueuedConnection);
}

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

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");
  }
}

void MainWindow::onAboutClicked() {
  const QString applicationName = APPLICATION_NAME;
  const QString titlePrefix     = tr("About ");
  const QString aboutText =
      tr(QString("<b>%1 v%2</b> is a template for Qt applications."
                 "<br><br><a href=\"https://working-copy.org/\">Working-Copy_Collective website</a>"
                 "<br><br><a href=\"mailto:support@working-copy.org\">Mail to support</a>"
                 "<br><br>It uses the <a href=\"https://qt.io\">Qt Framework</a>.")
             .arg(applicationName)
             .arg(APPLICATION_VERSION)
             .toLatin1());
  QMessageBox::about(this, titlePrefix + applicationName, aboutText);
}

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

void MainWindow::on_actionCheck_for_update_triggered() {
  showStatusMessage("Checking for update...");
  const bool updateAvailable = m_core->isApplicationUpdateAvailable();
  if (updateAvailable) {
    const QString text = isWindowModified() ? updateTextDirty : updateTextClean;
    const QMessageBox::StandardButton clickedButton = QMessageBox::question(
        this, tr("Update available."), text, QMessageBox::Yes | QMessageBox::No, QMessageBox::Yes);
    if (clickedButton == QMessageBox::Yes) {
      m_core->triggerApplicationUpdate();
      close();
    }
  }
}

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

void MainWindow::openNewItemDialog() {
  showStatusMessage(tr("Invoked 'Edit|New Item'"));
  m_newItemDialog->show();
}

void MainWindow::createActions() {
  // TODO add generic menu actions (file/new, edit/cut, ...)
  createFileActions();
  createEditActions();
}

void MainWindow::createFileActions() {
  m_newFileAct = make_unique<QAction>(tr("&New File"), this);
  m_newFileAct->setShortcut(QKeySequence(Qt::CTRL | Qt::SHIFT | Qt::Key_N));
  m_newFileAct->setStatusTip(tr("Create a new file"));
  // connect(m_newAct, &QAction::triggered, this, &MainWindow::newFile);
  m_newFileAct->setEnabled(false);
  ui->menu_File->addAction(m_newFileAct.get());

  m_openAct = make_unique<QAction>(tr("&Open..."), this);
  m_openAct->setShortcuts(QKeySequence::Open);
  m_openAct->setStatusTip(tr("Open an existing file"));
  // connect(m_openAct, &QAction::triggered, this, &MainWindow::open);
  m_openAct->setEnabled(false);
  ui->menu_File->addAction(m_openAct.get());

  m_saveAct = make_unique<QAction>(tr("&Save"), this);
  m_saveAct->setShortcuts(QKeySequence::Save);
  m_saveAct->setStatusTip(tr("Save the document to disk"));
  // connect(m_saveAct, &QAction::triggered, this, &MainWindow::save);
  m_saveAct->setEnabled(false);
  ui->menu_File->addAction(m_saveAct.get());

  ui->menu_File->addSeparator();

  m_importAct = make_unique<QAction>(tr("&Import CSV..."), this);
  m_importAct->setStatusTip(tr("Import an existing CSV file"));
  // connect(m_importAct, &QAction::triggered, this, &MainWindow::importCSV);
  m_importAct->setEnabled(false);
  ui->menu_File->addAction(m_importAct.get());

  m_exportAct = make_unique<QAction>(tr("&Export CSV..."), this);
  m_exportAct->setStatusTip(tr("Export content to a CSV document to disk"));
  // connect(m_exportAct, &QAction::triggered, this, &MainWindow::exportCSV);
  m_exportAct->setEnabled(false);
  ui->menu_File->addAction(m_exportAct.get());

  ui->menu_File->addSeparator();

  m_printAct = make_unique<QAction>(tr("&Print..."), this);
  m_printAct->setShortcuts(QKeySequence::Print);
  m_printAct->setStatusTip(tr("Print the document"));
  // connect(m_printAct, &QAction::triggered, this, &MainWindow::print);
  m_printAct->setEnabled(false);
  ui->menu_File->addAction(m_printAct.get());

  ui->menu_File->addSeparator();

  m_exitAct = make_unique<QAction>(tr("E&xit"), this);
  m_exitAct->setShortcuts(QKeySequence::Quit);
  m_exitAct->setStatusTip(tr("Exit the application"));
  connect(m_exitAct.get(), &QAction::triggered, this, &QWidget::close);
  ui->menu_File->addAction(m_exitAct.get());
}

void MainWindow::createEditActions() {
  m_cutAct = make_unique<QAction>(tr("Cu&t"), this);
  m_cutAct->setShortcuts(QKeySequence::Cut);
  m_cutAct->setStatusTip(
      tr("Cut the current selection's contents to the "
         "clipboard"));
  // connect(m_cutAct, &QAction::triggered, this, &MainWindow::cut);
  m_cutAct->setEnabled(false);
  ui->menu_Edit->addAction(m_cutAct.get());

  m_copyAct = make_unique<QAction>(tr("&Copy"), this);
  m_copyAct->setShortcuts(QKeySequence::Copy);
  m_copyAct->setStatusTip(
      tr("Copy the current selection's contents to the "
         "clipboard"));
  // connect(m_copyAct, &QAction::triggered, this, &MainWindow::copy);
  m_copyAct->setEnabled(false);
  ui->menu_Edit->addAction(m_copyAct.get());

  m_pasteAct = make_unique<QAction>(tr("&Paste"), this);
  m_pasteAct->setShortcuts(QKeySequence::Paste);
  m_pasteAct->setStatusTip(
      tr("Paste the clipboard's contents into the current "
         "selection"));
  // connect(m_pasteAct, &QAction::triggered, this, &MainWindow::paste);
  m_pasteAct->setEnabled(false);
  ui->menu_Edit->addAction(m_pasteAct.get());

  ui->menu_Edit->addSeparator();

  m_openNewItemDialogAct = make_unique<QAction>(tr("&New item"), this);
  m_openNewItemDialogAct->setShortcut(QKeySequence::New);
  m_openNewItemDialogAct->setStatusTip(tr("Opens a dialog to add a new item"));
  connect(m_openNewItemDialogAct.get(), &QAction::triggered, this, &MainWindow::openNewItemDialog);
  // m_openNewItemDialogAct->setEnabled(false);
  ui->menu_Edit->addAction(m_openNewItemDialogAct.get());

  m_openEditItemDialogAct = make_unique<QAction>(tr("&Edit item"), this);
  m_openEditItemDialogAct->setShortcut(QKeySequence(Qt::CTRL | Qt::Key_E));
  m_openEditItemDialogAct->setStatusTip(tr("Opens a edit dialog for the current item"));
  // connect(m_openEditItemDialogAct, &QAction::triggered, this, &MainWindow::openEditDialog);
  m_openEditItemDialogAct->setEnabled(false);
  ui->menu_Edit->addAction(m_openEditItemDialogAct.get());

  m_deleteItemAct = make_unique<QAction>(tr("&Delete item"), this);
  m_deleteItemAct->setShortcuts(QKeySequence::Delete);
  m_deleteItemAct->setStatusTip(tr("Delete currently selected items"));
  // connect(m_deleteAct, &QAction::triggered, this, &MainWindow::deleteItem);
  m_deleteItemAct->setEnabled(false);
  ui->menu_Edit->addAction(m_deleteItemAct.get());

  ui->menu_Edit->addSeparator();

  m_findItemAct = make_unique<QAction>(tr("&Find item(s)"), this);
  m_findItemAct->setShortcuts(QKeySequence::Find);
  m_findItemAct->setStatusTip(tr("Opens a dialog to find item(s) by containing text"));
  // connect(m_findItemAct, &QAction::triggered, this, &MainWindow::findItems);
  m_findItemAct->setEnabled(false);
  ui->menu_Edit->addAction(m_findItemAct.get());
}

void MainWindow::createHelpMenu() {
  QMenu* helpMenu = ui->menu_Help;
  helpMenu->addSeparator();
  QAction* aboutAct = helpMenu->addAction(tr("&About"), this, &MainWindow::onAboutClicked);
  aboutAct->setStatusTip(tr("Show the application's About box"));

  QAction* aboutQtAct = helpMenu->addAction(tr("About &Qt"), qApp, &QApplication::aboutQt);
  aboutQtAct->setStatusTip(tr("Show the Qt library's About box"));
}

void MainWindow::createGuiDialogs() {
  m_newItemDialog = make_unique<NewItemDialog>(this);
  m_newItemDialog->createContent();
  connect(m_newItemDialog.get(), &NewItemDialog::addItems, m_tableModel.get(),
          &TableModel::appendItems);
}