// SPDX-License-Identifier: GPL-3.0-only
/*
 *  Prism Launcher - Minecraft Launcher
 *  Copyright (C) 2022 Sefa Eyeoglu <contact@scrumplex.net>
 *  Copyright (C) 2022 TheKodeToad <TheKodeToad@proton.me>
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, version 3.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
 *
 * This file incorporates work covered by the following copyright and
 * permission notice:
 *
 *      Copyright 2013-2021 MultiMC Contributors
 *
 *      Authors: Andrew Okin
 *               Peterix
 *               Orochimarufan <orochimarufan.x3@gmail.com>
 *
 *      Licensed under the Apache License, Version 2.0 (the "License");
 *      you may not use this file except in compliance with the License.
 *      You may obtain a copy of the License at
 *
 *          http://www.apache.org/licenses/LICENSE-2.0
 *
 *      Unless required by applicable law or agreed to in writing, software
 *      distributed under the License is distributed on an "AS IS" BASIS,
 *      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *      See the License for the specific language governing permissions and
 *      limitations under the License.
 */

#include "Application.h"
#include "BuildConfig.h"
#include "FileSystem.h"

#include "MainWindow.h"
#include "ui_MainWindow.h"

#include <QVariant>
#include <QUrl>
#include <QDir>
#include <QFileInfo>

#include <QKeyEvent>
#include <QAction>
#include <QActionGroup>
#include <QApplication>
#include <QButtonGroup>
#include <QHBoxLayout>
#include <QHeaderView>
#include <QMainWindow>
#include <QStatusBar>
#include <QToolBar>
#include <QWidget>
#include <QMenu>
#include <QMenuBar>
#include <QMessageBox>
#include <QFileDialog>
#include <QInputDialog>
#include <QLabel>
#include <QToolButton>
#include <QWidgetAction>
#include <QProgressDialog>
#include <QShortcut>

#include <BaseInstance.h>
#include <InstanceList.h>
#include <minecraft/MinecraftInstance.h>
#include <MMCZip.h>
#include <icons/IconList.h>
#include <java/JavaUtils.h>
#include <java/JavaInstallList.h>
#include <launch/LaunchTask.h>
#include <minecraft/auth/AccountList.h>
#include <SkinUtils.h>
#include <BuildConfig.h>
#include <net/NetJob.h>
#include <net/Download.h>
#include <news/NewsChecker.h>
#include <tools/BaseProfiler.h>
#include <updater/ExternalUpdater.h>
#include <DesktopServices.h>
#include "InstanceWindow.h"
#include "InstancePageProvider.h"
#include "JavaCommon.h"
#include "LaunchController.h"

#include "ui/instanceview/InstanceProxyModel.h"
#include "ui/instanceview/InstanceView.h"
#include "ui/instanceview/InstanceDelegate.h"
#include "ui/widgets/LabeledToolButton.h"
#include "ui/dialogs/NewInstanceDialog.h"
#include "ui/dialogs/NewsDialog.h"
#include "ui/dialogs/ProgressDialog.h"
#include "ui/dialogs/AboutDialog.h"
#include "ui/dialogs/CustomMessageBox.h"
#include "ui/dialogs/IconPickerDialog.h"
#include "ui/dialogs/CopyInstanceDialog.h"
#include "ui/dialogs/EditAccountDialog.h"
#include "ui/dialogs/ExportInstanceDialog.h"
#include "ui/dialogs/ImportResourceDialog.h"
#include "ui/themes/ITheme.h"
#include "ui/themes/ThemeManager.h"

#include "minecraft/mod/tasks/LocalResourceParse.h"
#include "minecraft/mod/ModFolderModel.h"
#include "minecraft/mod/ShaderPackFolderModel.h"
#include "minecraft/WorldList.h"

#include "KonamiCode.h"

#include "InstanceImportTask.h"
#include "InstanceCopyTask.h"

#include "MMCTime.h"

namespace {
QString profileInUseFilter(const QString & profile, bool used)
{
    if(used)
    {
        return QObject::tr("%1 (in use)").arg(profile);
    }
    else
    {
        return profile;
    }
}
}

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

    setWindowIcon(APPLICATION->getThemedIcon("logo"));
    setWindowTitle(APPLICATION->applicationDisplayName());
#ifndef QT_NO_ACCESSIBILITY
    setAccessibleName(BuildConfig.LAUNCHER_DISPLAYNAME);
#endif

    // instance toolbar stuff
    {
        // Qt doesn't like vertical moving toolbars, so we have to force them...
        // See https://github.com/PolyMC/PolyMC/issues/493
        connect(ui->instanceToolBar, &QToolBar::orientationChanged,
                [=](Qt::Orientation) { ui->instanceToolBar->setOrientation(Qt::Vertical); });

        // if you try to add a widget to a toolbar in a .ui file
        // qt designer will delete it when you save the file >:(
        changeIconButton = new LabeledToolButton(this);
        changeIconButton->setObjectName(QStringLiteral("changeIconButton"));
        changeIconButton->setIcon(APPLICATION->getThemedIcon("news"));
        changeIconButton->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Preferred);
        connect(changeIconButton, &QToolButton::clicked, this, &MainWindow::on_actionChangeInstIcon_triggered);
        ui->instanceToolBar->insertWidgetBefore(ui->actionLaunchInstance, changeIconButton);

        renameButton = new LabeledToolButton(this);
        renameButton->setObjectName(QStringLiteral("renameButton"));
        renameButton->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Preferred);
        connect(renameButton, &QToolButton::clicked, this, &MainWindow::on_actionRenameInstance_triggered);
        ui->instanceToolBar->insertWidgetBefore(ui->actionLaunchInstance, renameButton);

        ui->instanceToolBar->insertSeparator(ui->actionLaunchInstance);

        // restore the instance toolbar settings
        auto const setting_name = QString("WideBarVisibility_%1").arg(ui->instanceToolBar->objectName());
        if (!APPLICATION->settings()->contains(setting_name))
            instanceToolbarSetting = APPLICATION->settings()->registerSetting(setting_name);
        else
            instanceToolbarSetting = APPLICATION->settings()->getSetting(setting_name);

        ui->instanceToolBar->setVisibilityState(instanceToolbarSetting->get().toByteArray());

        ui->instanceToolBar->addContextMenuAction(ui->newsToolBar->toggleViewAction());
        ui->instanceToolBar->addContextMenuAction(ui->instanceToolBar->toggleViewAction());
        ui->instanceToolBar->addContextMenuAction(ui->actionLockToolbars);

    }

    // set the menu for the folders help, and accounts tool buttons
    {
        auto foldersMenuButton = dynamic_cast<QToolButton*>(ui->mainToolBar->widgetForAction(ui->actionFoldersButton));
        ui->actionFoldersButton->setMenu(ui->foldersMenu);
        foldersMenuButton->setPopupMode(QToolButton::InstantPopup);

        helpMenuButton = dynamic_cast<QToolButton*>(ui->mainToolBar->widgetForAction(ui->actionHelpButton));
        ui->actionHelpButton->setMenu(new QMenu(this));
        ui->actionHelpButton->menu()->addActions(ui->helpMenu->actions());
        ui->actionHelpButton->menu()->removeAction(ui->actionCheckUpdate);
        helpMenuButton->setPopupMode(QToolButton::InstantPopup);

        auto accountMenuButton = dynamic_cast<QToolButton*>(ui->mainToolBar->widgetForAction(ui->actionAccountsButton));
        ui->actionAccountsButton->setMenu(ui->accountsMenu);
        accountMenuButton->setPopupMode(QToolButton::InstantPopup);
    }

    // hide, disable and show stuff
    {
        ui->actionReportBug->setVisible(!BuildConfig.BUG_TRACKER_URL.isEmpty());
        ui->actionMATRIX->setVisible(!BuildConfig.MATRIX_URL.isEmpty());
        ui->actionDISCORD->setVisible(!BuildConfig.DISCORD_URL.isEmpty());
        ui->actionREDDIT->setVisible(!BuildConfig.SUBREDDIT_URL.isEmpty());

        ui->actionCheckUpdate->setVisible(BuildConfig.UPDATER_ENABLED);

#ifndef Q_OS_MAC
        ui->actionAddToPATH->setVisible(false);
#endif

        // disabled until we have an instance selected
        ui->instanceToolBar->setEnabled(false);
        setInstanceActionsEnabled(false);
    }

    // add the toolbar toggles to the view menu
    ui->viewMenu->addAction(ui->instanceToolBar->toggleViewAction());
    ui->viewMenu->addAction(ui->newsToolBar->toggleViewAction());

    updateThemeMenu();
    updateMainToolBar();
    // OSX magic.
    setUnifiedTitleAndToolBarOnMac(true);

    // Global shortcuts
    {
        // you can't set QKeySequence::StandardKey shortcuts in qt designer >:(
        ui->actionAddInstance->setShortcut(QKeySequence::New);
        ui->actionSettings->setShortcut(QKeySequence::Preferences);
        ui->actionUndoTrashInstance->setShortcut(QKeySequence::Undo);
        ui->actionDeleteInstance->setShortcuts({ QKeySequence(tr("Backspace")), QKeySequence::Delete });
        ui->actionCloseWindow->setShortcut(QKeySequence::Close);
        connect(ui->actionCloseWindow, &QAction::triggered, APPLICATION, &Application::closeCurrentWindow);

        // FIXME: This is kinda weird. and bad. We need some kind of managed shutdown.
        auto q = new QShortcut(QKeySequence::Quit, this);
        connect(q, &QShortcut::activated, APPLICATION, &Application::quit);
    }

    // Konami Code
    {
        secretEventFilter = new KonamiCode(this);
        connect(secretEventFilter, &KonamiCode::triggered, this, &MainWindow::konamiTriggered);
    }

    // Add the news label to the news toolbar.
    {
        m_newsChecker.reset(new NewsChecker(APPLICATION->network(), BuildConfig.NEWS_RSS_URL));
        newsLabel = new QToolButton();
        newsLabel->setIcon(APPLICATION->getThemedIcon("news"));
        newsLabel->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Preferred);
        newsLabel->setToolButtonStyle(Qt::ToolButtonTextBesideIcon);
        newsLabel->setFocusPolicy(Qt::NoFocus);
        ui->newsToolBar->insertWidget(ui->actionMoreNews, newsLabel);

        QObject::connect(newsLabel, &QAbstractButton::clicked, this, &MainWindow::newsButtonClicked);
        QObject::connect(m_newsChecker.get(), &NewsChecker::newsLoaded, this, &MainWindow::updateNewsLabel);
        updateNewsLabel();
    }

    // Create the instance list widget
    {
        view = new InstanceView(ui->centralWidget);

        view->setSelectionMode(QAbstractItemView::SingleSelection);
        // FIXME: leaks ListViewDelegate
        view->setItemDelegate(new ListViewDelegate(this));
        view->setFrameShape(QFrame::NoFrame);
        // do not show ugly blue border on the mac
        view->setAttribute(Qt::WA_MacShowFocusRect, false);

        view->installEventFilter(this);
        view->setContextMenuPolicy(Qt::CustomContextMenu);
        connect(view, &QWidget::customContextMenuRequested, this, &MainWindow::showInstanceContextMenu);
        connect(view, &InstanceView::droppedURLs, this, &MainWindow::processURLs, Qt::QueuedConnection);

        proxymodel = new InstanceProxyModel(this);
        proxymodel->setSourceModel(APPLICATION->instances().get());
        proxymodel->sort(0);
        connect(proxymodel, &InstanceProxyModel::dataChanged, this, &MainWindow::instanceDataChanged);

        view->setModel(proxymodel);
        view->setSourceOfGroupCollapseStatus([](const QString & groupName)->bool {
            return APPLICATION->instances()->isGroupCollapsed(groupName);
        });
        connect(view, &InstanceView::groupStateChanged, APPLICATION->instances().get(), &InstanceList::on_GroupStateChanged);
        ui->horizontalLayout->addWidget(view);
    }
    // The cat background
    {
        // set the cat action priority here so you can still see the action in qt designer
        ui->actionCAT->setPriority(QAction::LowPriority);
        bool cat_enable = APPLICATION->settings()->get("TheCat").toBool();
        ui->actionCAT->setChecked(cat_enable);
        connect(ui->actionCAT, &QAction::toggled, this, &MainWindow::onCatToggled);
        connect(APPLICATION, &Application::currentCatChanged, this, &MainWindow::onCatChanged);
        setCatBackground(cat_enable);
    }

    // Lock toolbars
    {
        bool toolbarsLocked = APPLICATION->settings()->get("ToolbarsLocked").toBool();
        ui->actionLockToolbars->setChecked(toolbarsLocked);
        connect(ui->actionLockToolbars, &QAction::toggled, this, &MainWindow::lockToolbars);
        lockToolbars(toolbarsLocked);
    }
    // start instance when double-clicked
    connect(view, &InstanceView::activated, this, &MainWindow::instanceActivated);

    // track the selection -- update the instance toolbar
    connect(view->selectionModel(), &QItemSelectionModel::currentChanged, this, &MainWindow::instanceChanged);

    // track icon changes and update the toolbar!
    connect(APPLICATION->icons().get(), &IconList::iconUpdated, this, &MainWindow::iconUpdated);

    // model reset -> selection is invalid. All the instance pointers are wrong.
    connect(APPLICATION->instances().get(), &InstanceList::dataIsInvalid, this, &MainWindow::selectionBad);

    // handle newly added instances
    connect(APPLICATION->instances().get(), &InstanceList::instanceSelectRequest, this, &MainWindow::instanceSelectRequest);

    // When the global settings page closes, we want to know about it and update our state
    connect(APPLICATION, &Application::globalSettingsClosed, this, &MainWindow::globalSettingsClosed);

    m_statusLeft = new QLabel(tr("No instance selected"), this);
    m_statusCenter = new QLabel(tr("Total playtime: 0s"), this);
    statusBar()->addPermanentWidget(m_statusLeft, 1);
    statusBar()->addPermanentWidget(m_statusCenter, 0);

    // Add "manage accounts" button, right align
    QWidget *spacer = new QWidget();
    spacer->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
    ui->mainToolBar->insertWidget(ui->actionAccountsButton, spacer);

    // Use undocumented property... https://stackoverflow.com/questions/7121718/create-a-scrollbar-in-a-submenu-qt
    ui->accountsMenu->setStyleSheet("QMenu { menu-scrollable: 1; }");

    repopulateAccountsMenu();

    // Update the menu when the active account changes.
    // Shouldn't have to use lambdas here like this, but if I don't, the compiler throws a fit.
    // Template hell sucks...
    connect(
        APPLICATION->accounts().get(),
        &AccountList::defaultAccountChanged,
        [this] {
            defaultAccountChanged();
        }
    );
    connect(
        APPLICATION->accounts().get(),
        &AccountList::listChanged,
        [this]
        {
            repopulateAccountsMenu();
        }
    );

    // Show initial account
    defaultAccountChanged();

    // TODO: refresh accounts here?
    // auto accounts = APPLICATION->accounts();

    // load the news
    {
        m_newsChecker->reloadNews();
        updateNewsLabel();
    }

    if (BuildConfig.UPDATER_ENABLED) {
        bool updatesAllowed = APPLICATION->updatesAreAllowed();
        updatesAllowedChanged(updatesAllowed);

        connect(ui->actionCheckUpdate, &QAction::triggered, this, &MainWindow::checkForUpdates);

        // set up the updater object.
        auto updater = APPLICATION->updater();

        if (updater) {
            connect(updater.get(), &ExternalUpdater::canCheckForUpdatesChanged, this, &MainWindow::updatesAllowedChanged);
        }
    }

    connect(ui->actionUndoTrashInstance, &QAction::triggered, this, &MainWindow::undoTrashInstance);

    setSelectedInstanceById(APPLICATION->settings()->get("SelectedInstance").toString());

    // removing this looks stupid
    view->setFocus();

    retranslateUi();
}

// macOS always has a native menu bar, so these fixes are not applicable
// Other systems may or may not have a native menu bar (most do not - it seems like only Ubuntu Unity does)
#ifndef Q_OS_MAC
void MainWindow::keyReleaseEvent(QKeyEvent *event)
{
    if(event->key()==Qt::Key_Alt && !APPLICATION->settings()->get("MenuBarInsteadOfToolBar").toBool())
        ui->menuBar->setVisible(!ui->menuBar->isVisible());
    else
        QMainWindow::keyReleaseEvent(event);
}
#endif

void MainWindow::retranslateUi()
{
    auto accounts = APPLICATION->accounts();
    MinecraftAccountPtr defaultAccount = accounts->defaultAccount();
    if(defaultAccount) {
        auto profileLabel = profileInUseFilter(defaultAccount->profileName(), defaultAccount->isInUse());
        ui->actionAccountsButton->setText(profileLabel);
    }
    else {
        ui->actionAccountsButton->setText(tr("Accounts"));
    }

    if (m_selectedInstance) {
        m_statusLeft->setText(m_selectedInstance->getStatusbarDescription());
    } else {
        m_statusLeft->setText(tr("No instance selected"));
    }

    ui->retranslateUi(this);

    changeIconButton->setToolTip(ui->actionChangeInstIcon->toolTip());
    renameButton->setToolTip(ui->actionRenameInstance->toolTip());

    // replace the %1 with the launcher display name in some actions
    if (helpMenuButton->toolTip().contains("%1"))
        helpMenuButton->setToolTip(helpMenuButton->toolTip().arg(BuildConfig.LAUNCHER_DISPLAYNAME));

    for (auto action : ui->helpMenu->actions()) {
        if (action->text().contains("%1"))
            action->setText(action->text().arg(BuildConfig.LAUNCHER_DISPLAYNAME));
        if (action->toolTip().contains("%1"))
            action->setToolTip(action->toolTip().arg(BuildConfig.LAUNCHER_DISPLAYNAME));
    }
}

MainWindow::~MainWindow()
{
}

QMenu * MainWindow::createPopupMenu()
{
    QMenu* filteredMenu = QMainWindow::createPopupMenu();
    filteredMenu->removeAction( ui->mainToolBar->toggleViewAction() );

    filteredMenu->addAction(ui->actionLockToolbars);

    return filteredMenu;
}
void MainWindow::lockToolbars(bool state)
{
    ui->mainToolBar->setMovable(!state);
    ui->instanceToolBar->setMovable(!state);
    ui->newsToolBar->setMovable(!state);
    APPLICATION->settings()->set("ToolbarsLocked", state);
}


void MainWindow::konamiTriggered()
{
    qDebug() << "Super Secret Mode ACTIVATED!";
}

void MainWindow::showInstanceContextMenu(const QPoint &pos)
{
    QList<QAction *> actions;

    QAction *actionSep = new QAction("", this);
    actionSep->setSeparator(true);

    bool onInstance = view->indexAt(pos).isValid();
    if (onInstance)
    {
        // reuse the file menu actions
        actions = ui->fileMenu->actions();

        // remove the add instance action, launcher settings action and close action
        actions.removeFirst();
        actions.removeLast();
        actions.removeLast();

        actions.prepend(ui->actionChangeInstIcon);
        actions.prepend(ui->actionRenameInstance);

        // add header
        actions.prepend(actionSep);
        QAction *actionVoid = new QAction(m_selectedInstance->name(), this);
        actionVoid->setEnabled(false);
        actions.prepend(actionVoid);
    }
    else
    {
        auto group = view->groupNameAt(pos);

        QAction *actionVoid = new QAction(BuildConfig.LAUNCHER_DISPLAYNAME, this);
        actionVoid->setEnabled(false);

        QAction *actionCreateInstance = new QAction(tr("Create instance"), this);
        actionCreateInstance->setToolTip(ui->actionAddInstance->toolTip());
        if(!group.isNull())
        {
            QVariantMap data;
            data["group"] = group;
            actionCreateInstance->setData(data);
        }

        connect(actionCreateInstance, SIGNAL(triggered(bool)), SLOT(on_actionAddInstance_triggered()));

        actions.prepend(actionSep);
        actions.prepend(actionVoid);
        actions.append(actionCreateInstance);
        if(!group.isNull())
        {
            QAction *actionDeleteGroup = new QAction(tr("Delete group '%1'").arg(group), this);
            QVariantMap data;
            data["group"] = group;
            actionDeleteGroup->setData(data);
            connect(actionDeleteGroup, SIGNAL(triggered(bool)), SLOT(deleteGroup()));
            actions.append(actionDeleteGroup);
        }
    }
    QMenu myMenu;
    myMenu.addActions(actions);
    /*
    if (onInstance)
        myMenu.setEnabled(m_selectedInstance->canLaunch());
    */
    myMenu.exec(view->mapToGlobal(pos));
}

void MainWindow::updateMainToolBar()
{
    ui->menuBar->setVisible(APPLICATION->settings()->get("MenuBarInsteadOfToolBar").toBool());
    ui->mainToolBar->setVisible(ui->menuBar->isNativeMenuBar() || !APPLICATION->settings()->get("MenuBarInsteadOfToolBar").toBool());
}

void MainWindow::updateToolsMenu()
{
    bool currentInstanceRunning = m_selectedInstance && m_selectedInstance->isRunning();

    ui->actionLaunchInstance->setDisabled(!m_selectedInstance || currentInstanceRunning);
    ui->actionLaunchInstanceOffline->setDisabled(!m_selectedInstance || currentInstanceRunning);
    ui->actionLaunchInstanceDemo->setDisabled(!m_selectedInstance || currentInstanceRunning);

    QMenu *launchMenu = ui->actionLaunchInstance->menu();
    if (launchMenu)
    {
        launchMenu->clear();
    }
    else
    {
        launchMenu = new QMenu(this);
    }
    QAction *normalLaunch = launchMenu->addAction(tr("Launch"));
    normalLaunch->setShortcut(QKeySequence::Open);
    QAction *normalLaunchOffline = launchMenu->addAction(tr("Launch Offline"));
    normalLaunchOffline->setShortcut(QKeySequence(tr("Ctrl+Shift+O")));
    QAction *normalLaunchDemo = launchMenu->addAction(tr("Launch Demo"));
    normalLaunchDemo->setShortcut(QKeySequence(tr("Ctrl+Alt+O")));
    if (m_selectedInstance)
    {
        normalLaunch->setEnabled(m_selectedInstance->canLaunch());
        normalLaunchOffline->setEnabled(m_selectedInstance->canLaunch());
        normalLaunchDemo->setEnabled(m_selectedInstance->canLaunch());

        connect(normalLaunch, &QAction::triggered, [this]() {
            APPLICATION->launch(m_selectedInstance, true, false);
        });
        connect(normalLaunchOffline, &QAction::triggered, [this]() {
            APPLICATION->launch(m_selectedInstance, false, false);
        });
        connect(normalLaunchDemo, &QAction::triggered, [this]() {
            APPLICATION->launch(m_selectedInstance, false, true);
        });
    }
    else
    {
        normalLaunch->setDisabled(true);
        normalLaunchOffline->setDisabled(true);
        normalLaunchDemo->setDisabled(true);
    }

    // Disable demo-mode if not available.
    auto instance = dynamic_cast<MinecraftInstance*>(m_selectedInstance.get());
    if (instance) {
        normalLaunchDemo->setEnabled(instance->supportsDemo());
    }

    QString profilersTitle = tr("Profilers");
    launchMenu->addSeparator()->setText(profilersTitle);
    for (auto profiler : APPLICATION->profilers().values())
    {
        QAction *profilerAction = launchMenu->addAction(profiler->name());
        QAction *profilerOfflineAction = launchMenu->addAction(tr("%1 Offline").arg(profiler->name()));
        QString error;
        if (!profiler->check(&error))
        {
            profilerAction->setDisabled(true);
            profilerOfflineAction->setDisabled(true);
            QString profilerToolTip = tr("Profiler not setup correctly. Go into settings, \"External Tools\".");
            profilerAction->setToolTip(profilerToolTip);
            profilerOfflineAction->setToolTip(profilerToolTip);
        }
        else if (m_selectedInstance)
        {
            profilerAction->setEnabled(m_selectedInstance->canLaunch());
            profilerOfflineAction->setEnabled(m_selectedInstance->canLaunch());

            connect(profilerAction, &QAction::triggered, [this, profiler]()
                    {
                        APPLICATION->launch(m_selectedInstance, true, false, profiler.get());
                    });
            connect(profilerOfflineAction, &QAction::triggered, [this, profiler]()
                    {
                        APPLICATION->launch(m_selectedInstance, false, false, profiler.get());
                    });
        }
        else
        {
            profilerAction->setDisabled(true);
            profilerOfflineAction->setDisabled(true);
        }
    }
    ui->actionLaunchInstance->setMenu(launchMenu);
}

void MainWindow::updateThemeMenu()
{
    QMenu *themeMenu = ui->actionChangeTheme->menu();

    if (themeMenu) {
        themeMenu->clear();
    } else {
        themeMenu = new QMenu(this);
    }

    auto themes = APPLICATION->getValidApplicationThemes();

    QActionGroup* themesGroup = new QActionGroup( this );

    for (auto* theme : themes) {
        QAction * themeAction = themeMenu->addAction(theme->name());

        themeAction->setCheckable(true);
        if (APPLICATION->settings()->get("ApplicationTheme").toString() == theme->id()) {
            themeAction->setChecked(true);
        }
        themeAction->setActionGroup(themesGroup);

        connect(themeAction, &QAction::triggered, [theme]() {
            APPLICATION->setApplicationTheme(theme->id());
            APPLICATION->settings()->set("ApplicationTheme", theme->id());
        });
    }

    ui->actionChangeTheme->setMenu(themeMenu);
}

void MainWindow::repopulateAccountsMenu()
{
    ui->accountsMenu->clear();

    auto accounts = APPLICATION->accounts();
    MinecraftAccountPtr defaultAccount = accounts->defaultAccount();

    QString active_profileId = "";
    if (defaultAccount)
    {
        // this can be called before accountMenuButton exists
        if (ui->actionAccountsButton)
        {
            auto profileLabel = profileInUseFilter(defaultAccount->profileName(), defaultAccount->isInUse());
            ui->actionAccountsButton->setText(profileLabel);
        }
    }

    if (accounts->count() <= 0)
    {
        ui->actionNoAccountsAdded->setEnabled(false);
        ui->accountsMenu->addAction(ui->actionNoAccountsAdded);
    }
    else
    {
        // TODO: Nicer way to iterate?
        for (int i = 0; i < accounts->count(); i++)
        {
            MinecraftAccountPtr account = accounts->at(i);
            auto profileLabel = profileInUseFilter(account->profileName(), account->isInUse());
            QAction *action = new QAction(profileLabel, this);
            action->setData(i);
            action->setCheckable(true);
            if (defaultAccount == account)
            {
                action->setChecked(true);
            }

            auto face = account->getFace();
            if(!face.isNull()) {
                action->setIcon(face);
            }
            else {
                action->setIcon(APPLICATION->getThemedIcon("noaccount"));
            }

            const int highestNumberKey = 9;
            if(i<highestNumberKey)
            {
                action->setShortcut(QKeySequence(tr("Ctrl+%1").arg(i + 1)));
            }

            ui->accountsMenu->addAction(action);
            connect(action, SIGNAL(triggered(bool)), SLOT(changeActiveAccount()));
        }
    }

    ui->accountsMenu->addSeparator();

    ui->actionNoDefaultAccount->setData(-1);
    ui->actionNoDefaultAccount->setChecked(!defaultAccount);

    ui->accountsMenu->addAction(ui->actionNoDefaultAccount);

    connect(ui->actionNoDefaultAccount, SIGNAL(triggered(bool)), SLOT(changeActiveAccount()));

    ui->accountsMenu->addSeparator();
    ui->accountsMenu->addAction(ui->actionManageAccounts);
}

void MainWindow::updatesAllowedChanged(bool allowed)
{
    if(!BuildConfig.UPDATER_ENABLED)
    {
        return;
    }
    ui->actionCheckUpdate->setEnabled(allowed);
}

/*
 * Assumes the sender is a QAction
 */
void MainWindow::changeActiveAccount()
{
    QAction *sAction = (QAction *)sender();

    // Profile's associated Mojang username
    if (sAction->data().type() != QVariant::Type::Int)
        return;

    QVariant data = sAction->data();
    bool valid = false;
    int index = data.toInt(&valid);
    if(!valid) {
        index = -1;
    }
    auto accounts = APPLICATION->accounts();
    accounts->setDefaultAccount(index == -1 ? nullptr : accounts->at(index));
    defaultAccountChanged();
}

void MainWindow::defaultAccountChanged()
{
    repopulateAccountsMenu();

    MinecraftAccountPtr account = APPLICATION->accounts()->defaultAccount();

    // FIXME: this needs adjustment for MSA
    if (account && account->profileName() != "")
    {
        auto profileLabel = profileInUseFilter(account->profileName(), account->isInUse());
        ui->actionAccountsButton->setText(profileLabel);
        auto face = account->getFace();
        if(face.isNull()) {
            ui->actionAccountsButton->setIcon(APPLICATION->getThemedIcon("noaccount"));
        }
        else {
            ui->actionAccountsButton->setIcon(face);
        }
        return;
    }

    // Set the icon to the "no account" icon.
    ui->actionAccountsButton->setIcon(APPLICATION->getThemedIcon("noaccount"));
    ui->actionAccountsButton->setText(tr("Accounts"));
}

bool MainWindow::eventFilter(QObject *obj, QEvent *ev)
{
    if (obj == view)
    {
        if (ev->type() == QEvent::KeyPress)
        {
            secretEventFilter->input(ev);
            QKeyEvent *keyEvent = static_cast<QKeyEvent *>(ev);
            switch (keyEvent->key())
            {
                /*
            case Qt::Key_Enter:
            case Qt::Key_Return:
                activateInstance(m_selectedInstance);
                return true;
                */
            case Qt::Key_Delete:
                on_actionDeleteInstance_triggered();
                return true;
            case Qt::Key_F5:
                refreshInstances();
                return true;
            case Qt::Key_F2:
                on_actionRenameInstance_triggered();
                return true;
            default:
                break;
            }
        }
    }
    return QMainWindow::eventFilter(obj, ev);
}

void MainWindow::updateNewsLabel()
{
    if (m_newsChecker->isLoadingNews())
    {
        newsLabel->setText(tr("Loading news..."));
        newsLabel->setEnabled(false);
        ui->actionMoreNews->setVisible(false);
    }
    else
    {
        QList<NewsEntryPtr> entries = m_newsChecker->getNewsEntries();
        if (entries.length() > 0)
        {
            newsLabel->setText(entries[0]->title);
            newsLabel->setEnabled(true);
            ui->actionMoreNews->setVisible(true);
        }
        else
        {
            newsLabel->setText(tr("No news available."));
            newsLabel->setEnabled(false);
            ui->actionMoreNews->setVisible(false);
        }
    }
}

QList<int> stringToIntList(const QString &string)
{
#if QT_VERSION >= QT_VERSION_CHECK(5, 14, 0)
    QStringList split = string.split(',', Qt::SkipEmptyParts);
#else
    QStringList split = string.split(',', QString::SkipEmptyParts);
#endif
    QList<int> out;
    for (int i = 0; i < split.size(); ++i)
    {
        out.append(split.at(i).toInt());
    }
    return out;
}
QString intListToString(const QList<int> &list)
{
    QStringList slist;
    for (int i = 0; i < list.size(); ++i)
    {
        slist.append(QString::number(list.at(i)));
    }
    return slist.join(',');
}

void MainWindow::onCatToggled(bool state)
{
    setCatBackground(state);
    APPLICATION->settings()->set("TheCat", state);
}

void MainWindow::setCatBackground(bool enabled)
{
    if (enabled) {
        view->setStyleSheet(QString(R"(
InstanceView
{
    background-image: url(:/backgrounds/%1);
    background-attachment: fixed;
    background-clip: padding;
    background-position: bottom right;
    background-repeat: none;
    background-color:palette(base);
})")
                                .arg(ThemeManager::getCatImage()));
    } else {
        view->setStyleSheet(QString());
    }
}

void MainWindow::runModalTask(Task *task)
{
    connect(task, &Task::failed, [this](QString reason)
        {
            CustomMessageBox::selectable(this, tr("Error"), reason, QMessageBox::Critical)->show();
        });
    connect(task, &Task::succeeded, [this, task]()
        {
            QStringList warnings = task->warnings();
            if(warnings.count())
            {
                CustomMessageBox::selectable(this, tr("Warnings"), warnings.join('\n'), QMessageBox::Warning)->show();
            }
        });
    connect(task, &Task::aborted, [this]
        {
            CustomMessageBox::selectable(this, tr("Task aborted"), tr("The task has been aborted by the user."), QMessageBox::Information)->show();
        });
    ProgressDialog loadDialog(this);
    loadDialog.setSkipButton(true, tr("Abort"));
    loadDialog.execWithTask(task);
}

void MainWindow::instanceFromInstanceTask(InstanceTask *rawTask)
{
    unique_qobject_ptr<Task> task(APPLICATION->instances()->wrapInstanceTask(rawTask));
    runModalTask(task.get());
}

void MainWindow::on_actionCopyInstance_triggered()
{
    if (!m_selectedInstance)
        return;

    CopyInstanceDialog copyInstDlg(m_selectedInstance, this);
    if (!copyInstDlg.exec())
        return;

    auto copyTask = new InstanceCopyTask(m_selectedInstance, copyInstDlg.getChosenOptions());
    copyTask->setName(copyInstDlg.instName());
    copyTask->setGroup(copyInstDlg.instGroup());
    copyTask->setIcon(copyInstDlg.iconKey());
    unique_qobject_ptr<Task> task(APPLICATION->instances()->wrapInstanceTask(copyTask));
    runModalTask(task.get());
}

void MainWindow::finalizeInstance(InstancePtr inst)
{
    view->updateGeometries();
    setSelectedInstanceById(inst->id());
    if (APPLICATION->accounts()->anyAccountIsValid())
    {
        ProgressDialog loadDialog(this);
        auto update = inst->createUpdateTask(Net::Mode::Online);
        connect(update.get(), &Task::failed, [this](QString reason)
                {
                    QString error = QString("Instance load failed: %1").arg(reason);
                    CustomMessageBox::selectable(this, tr("Error"), error, QMessageBox::Warning)->show();
                });
        if(update)
        {
            loadDialog.setSkipButton(true, tr("Abort"));
            loadDialog.execWithTask(update.get());
        }
    }
    else
    {
        CustomMessageBox::selectable(
            this,
            tr("Error"),
            tr("The launcher cannot download Minecraft or update instances unless you have at least "
                "one account added.\nPlease add your Mojang or Minecraft account."),
            QMessageBox::Warning
        )->show();
    }
}

void MainWindow::addInstance(QString url)
{
    QString groupName;
    do
    {
        QObject* obj = sender();
        if(!obj)
            break;
        QAction *action = qobject_cast<QAction *>(obj);
        if(!action)
            break;
        auto map = action->data().toMap();
        if(!map.contains("group"))
            break;
        groupName = map["group"].toString();
    } while(0);

    if(groupName.isEmpty())
    {
        groupName = APPLICATION->settings()->get("LastUsedGroupForNewInstance").toString();
    }

    NewInstanceDialog newInstDlg(groupName, url, this);
    if (!newInstDlg.exec())
        return;

    APPLICATION->settings()->set("LastUsedGroupForNewInstance", newInstDlg.instGroup());

    InstanceTask * creationTask = newInstDlg.extractTask();
    if(creationTask)
    {
        instanceFromInstanceTask(creationTask);
    }
}

void MainWindow::on_actionAddInstance_triggered()
{
    addInstance();
}

void MainWindow::processURLs(QList<QUrl> urls)
{
    // NOTE: This loop only processes one dropped file!
    for (auto& url : urls) {
        qDebug() << "Processing" << url;

        // The isLocalFile() check below doesn't work as intended without an explicit scheme.
        if (url.scheme().isEmpty())
            url.setScheme("file");

        if (!url.isLocalFile()) {  // probably instance/modpack
            addInstance(url.toString());
            break;
        }

        auto localFileName = QDir::toNativeSeparators(url.toLocalFile()) ;
        QFileInfo localFileInfo(localFileName);

        auto type = ResourceUtils::identify(localFileInfo);

        if (ResourceUtils::ValidResourceTypes.count(type) == 0) {  // probably instance/modpack
            addInstance(localFileName);
            continue;
        }

        ImportResourceDialog dlg(localFileName, type, this);

        if (dlg.exec() != QDialog::Accepted)
            continue;

        qDebug() << "Adding resource" << localFileName << "to" << dlg.selectedInstanceKey;

        auto inst = APPLICATION->instances()->getInstanceById(dlg.selectedInstanceKey);
        auto minecraftInst = std::dynamic_pointer_cast<MinecraftInstance>(inst);

        switch (type) {
            case PackedResourceType::ResourcePack:
                minecraftInst->resourcePackList()->installResource(localFileName);
                break;
            case PackedResourceType::TexturePack:
                minecraftInst->texturePackList()->installResource(localFileName);
                break;
            case PackedResourceType::DataPack:
                qWarning() << "Importing of Data Packs not supported at this time. Ignoring" << localFileName;
                break;
            case PackedResourceType::Mod:
                minecraftInst->loaderModList()->installMod(localFileName);
                break;
            case PackedResourceType::ShaderPack:
                minecraftInst->shaderPackList()->installResource(localFileName);
                break;
            case PackedResourceType::WorldSave:
                minecraftInst->worldList()->installWorld(localFileInfo);
                break;
            case PackedResourceType::UNKNOWN:
            default:
                qDebug() << "Can't Identify" << localFileName << "Ignoring it.";
                break;
        }
    }
}

void MainWindow::on_actionREDDIT_triggered()
{
    DesktopServices::openUrl(QUrl(BuildConfig.SUBREDDIT_URL));
}

void MainWindow::on_actionDISCORD_triggered()
{
    DesktopServices::openUrl(QUrl(BuildConfig.DISCORD_URL));
}

void MainWindow::on_actionMATRIX_triggered()
{
    DesktopServices::openUrl(QUrl(BuildConfig.MATRIX_URL));
}

void MainWindow::on_actionChangeInstIcon_triggered()
{
    if (!m_selectedInstance)
        return;

    IconPickerDialog dlg(this);
    dlg.execWithSelection(m_selectedInstance->iconKey());
    if (dlg.result() == QDialog::Accepted)
    {
        m_selectedInstance->setIconKey(dlg.selectedIconKey);
        auto icon = APPLICATION->icons()->getIcon(dlg.selectedIconKey);
        ui->actionChangeInstIcon->setIcon(icon);
        changeIconButton->setIcon(icon);
    }
}

void MainWindow::iconUpdated(QString icon)
{
    if (icon == m_currentInstIcon)
    {
        auto icon = APPLICATION->icons()->getIcon(m_currentInstIcon);
        ui->actionChangeInstIcon->setIcon(icon);
        changeIconButton->setIcon(icon);
    }
}

void MainWindow::updateInstanceToolIcon(QString new_icon)
{
    m_currentInstIcon = new_icon;
    auto icon = APPLICATION->icons()->getIcon(m_currentInstIcon);
    ui->actionChangeInstIcon->setIcon(icon);
    changeIconButton->setIcon(icon);
}

void MainWindow::setSelectedInstanceById(const QString &id)
{
    if (id.isNull())
        return;
    const QModelIndex index = APPLICATION->instances()->getInstanceIndexById(id);
    if (index.isValid())
    {
        QModelIndex selectionIndex = proxymodel->mapFromSource(index);
        view->selectionModel()->setCurrentIndex(selectionIndex, QItemSelectionModel::ClearAndSelect);
        updateStatusCenter();
    }
}

void MainWindow::on_actionChangeInstGroup_triggered()
{
    if (!m_selectedInstance)
        return;

    bool ok = false;
    InstanceId instId = m_selectedInstance->id();
    QString name(APPLICATION->instances()->getInstanceGroup(instId));
    auto groups = APPLICATION->instances()->getGroups();
    groups.insert(0, "");
    groups.sort(Qt::CaseInsensitive);
    int foo = groups.indexOf(name);

    name = QInputDialog::getItem(this, tr("Group name"), tr("Enter a new group name."), groups, foo, true, &ok);
    name = name.simplified();
    if (ok)
    {
        APPLICATION->instances()->setInstanceGroup(instId, name);
    }
}

void MainWindow::deleteGroup()
{
    QObject* obj = sender();
    if(!obj)
        return;
    QAction *action = qobject_cast<QAction *>(obj);
    if(!action)
        return;
    auto map = action->data().toMap();
    if(!map.contains("group"))
        return;
    QString groupName = map["group"].toString();
    if(!groupName.isEmpty())
    {
        auto reply = QMessageBox::question(this, tr("Delete group"), tr("Are you sure you want to delete the group %1?")
            .arg(groupName), QMessageBox::Yes | QMessageBox::No);
        if(reply == QMessageBox::Yes)
        {
            APPLICATION->instances()->deleteGroup(groupName);
        }
    }
}

void MainWindow::undoTrashInstance()
{
    APPLICATION->instances()->undoTrashInstance();
    ui->actionUndoTrashInstance->setEnabled(APPLICATION->instances()->trashedSomething());
}

void MainWindow::on_actionViewInstanceFolder_triggered()
{
    QString str = APPLICATION->settings()->get("InstanceDir").toString();
    DesktopServices::openDirectory(str);
}

void MainWindow::refreshInstances()
{
    APPLICATION->instances()->loadList();
}

void MainWindow::on_actionViewCentralModsFolder_triggered()
{
    DesktopServices::openDirectory(APPLICATION->settings()->get("CentralModsDir").toString(), true);
}

void MainWindow::checkForUpdates()
{
    if(BuildConfig.UPDATER_ENABLED)
    {
        APPLICATION->triggerUpdateCheck();
    }
    else
    {
        qWarning() << "Updater not set up. Cannot check for updates.";
    }
}

void MainWindow::on_actionSettings_triggered()
{
    APPLICATION->ShowGlobalSettings(this, "global-settings");
}

void MainWindow::globalSettingsClosed()
{
    // FIXME: quick HACK to make this work. improve, optimize.
    APPLICATION->instances()->loadList();
    proxymodel->invalidate();
    proxymodel->sort(0);
    updateMainToolBar();
    updateToolsMenu();
    updateThemeMenu();
    updateStatusCenter();
    // This needs to be done to prevent UI elements disappearing in the event the config is changed
    // but Prism Launcher exits abnormally, causing the window state to never be saved:
    APPLICATION->settings()->set("MainWindowState", saveState().toBase64());
    update();
}

void MainWindow::on_actionEditInstance_triggered()
{
    APPLICATION->showInstanceWindow(m_selectedInstance);
}

void MainWindow::on_actionManageAccounts_triggered()
{
    APPLICATION->ShowGlobalSettings(this, "accounts");
}

void MainWindow::on_actionReportBug_triggered()
{
    DesktopServices::openUrl(QUrl(BuildConfig.BUG_TRACKER_URL));
}

void MainWindow::on_actionClearMetadata_triggered()
{
    APPLICATION->metacache()->evictAll();
    APPLICATION->metacache()->SaveNow();
}

#ifdef Q_OS_MAC
void MainWindow::on_actionAddToPATH_triggered()
{
    auto binaryPath = APPLICATION->applicationFilePath();
    auto targetPath = QString("/usr/local/bin/%1").arg(BuildConfig.LAUNCHER_APP_BINARY_NAME);
    qDebug() << "Symlinking" << binaryPath << "to" << targetPath;

    QStringList args;
    args << "-e";
    args << QString("do shell script \"mkdir -p /usr/local/bin && ln -sf '%1' '%2'\" with administrator privileges")
                .arg(binaryPath, targetPath);
    auto outcome = QProcess::execute("/usr/bin/osascript", args);
    if (!outcome) {
        QMessageBox::information(this, tr("Successfully added %1 to PATH").arg(BuildConfig.LAUNCHER_DISPLAYNAME),
                                 tr("%1 was successfully added to your PATH. You can now start it by running `%2`.")
                                     .arg(BuildConfig.LAUNCHER_DISPLAYNAME, BuildConfig.LAUNCHER_APP_BINARY_NAME));
    } else {
        QMessageBox::critical(this, tr("Failed to add %1 to PATH").arg(BuildConfig.LAUNCHER_DISPLAYNAME),
                              tr("An error occurred while trying to add %1 to PATH").arg(BuildConfig.LAUNCHER_DISPLAYNAME));
    }
}
#endif

void MainWindow::on_actionOpenWiki_triggered()
{
    DesktopServices::openUrl(QUrl(BuildConfig.HELP_URL.arg("")));
}

void MainWindow::on_actionMoreNews_triggered()
{
    auto entries = m_newsChecker->getNewsEntries();
    NewsDialog news_dialog(entries, this);
    news_dialog.exec();
}

void MainWindow::newsButtonClicked()
{
    auto entries = m_newsChecker->getNewsEntries();
    NewsDialog news_dialog(entries, this);
    news_dialog.toggleArticleList();
    news_dialog.exec();
}

void MainWindow::onCatChanged(int) {
    setCatBackground(APPLICATION->settings()->get("TheCat").toBool());
}

void MainWindow::on_actionAbout_triggered()
{
    AboutDialog dialog(this);
    dialog.exec();
}

void MainWindow::on_actionDeleteInstance_triggered()
{
    if (!m_selectedInstance) {
        return;
    }

    auto id = m_selectedInstance->id();

    auto response = CustomMessageBox::selectable(this, tr("Confirm Deletion"),
                                                 tr("You are about to delete \"%1\".\n"
                                                    "This may be permanent and will completely delete the instance.\n\n"
                                                    "Are you sure?")
                                                     .arg(m_selectedInstance->name()),
                                                 QMessageBox::Warning, QMessageBox::Yes | QMessageBox::No, QMessageBox::No)
                        ->exec();

    if (response != QMessageBox::Yes)
        return;

    auto linkedInstances = APPLICATION->instances()->getLinkedInstancesById(id);
    if (!linkedInstances.empty()) {
        response = CustomMessageBox::selectable(
                this, tr("There are linked instances"),
                tr("The folowing Instance(s) might reference files in this instance:\n\n"
                "%1\n\n"
                "Deleting it could break the other instance(s), \n\n"
                "Are you sure?").arg(linkedInstances.join("\n")), 
                QMessageBox::Warning, QMessageBox::Yes | QMessageBox::No, QMessageBox::No
            )->exec();
        if (response != QMessageBox::Yes)
            return;
    }

    if (APPLICATION->instances()->trashInstance(id)) {
        ui->actionUndoTrashInstance->setEnabled(APPLICATION->instances()->trashedSomething());
        return;
    }

    APPLICATION->instances()->deleteInstance(id);
}

void MainWindow::on_actionExportInstance_triggered()
{
    if (m_selectedInstance)
    {
        ExportInstanceDialog dlg(m_selectedInstance, this);
        dlg.exec();
    }
}

void MainWindow::on_actionRenameInstance_triggered()
{
    if (m_selectedInstance)
    {
        view->edit(view->currentIndex());
    }
}

void MainWindow::on_actionViewSelectedInstFolder_triggered()
{
    if (m_selectedInstance)
    {
        QString str = m_selectedInstance->instanceRoot();
        DesktopServices::openDirectory(QDir(str).absolutePath());
    }
}

void MainWindow::closeEvent(QCloseEvent *event)
{
    // Save the window state and geometry.
    APPLICATION->settings()->set("MainWindowState", saveState().toBase64());
    APPLICATION->settings()->set("MainWindowGeometry", saveGeometry().toBase64());
    instanceToolbarSetting->set(ui->instanceToolBar->getVisibilityState());
    event->accept();
    emit isClosing();
}

void MainWindow::changeEvent(QEvent* event)
{
    if (event->type() == QEvent::LanguageChange)
    {
        retranslateUi();
    }
    QMainWindow::changeEvent(event);
}

void MainWindow::instanceActivated(QModelIndex index)
{
    if (!index.isValid())
        return;
    QString id = index.data(InstanceList::InstanceIDRole).toString();
    InstancePtr inst = APPLICATION->instances()->getInstanceById(id);
    if (!inst)
        return;

    activateInstance(inst);
}

void MainWindow::on_actionLaunchInstance_triggered()
{
    if(m_selectedInstance && !m_selectedInstance->isRunning())
    {
        APPLICATION->launch(m_selectedInstance);
    }
}

void MainWindow::activateInstance(InstancePtr instance)
{
    APPLICATION->launch(instance);
}

void MainWindow::on_actionLaunchInstanceOffline_triggered()
{
    if (m_selectedInstance)
    {
        APPLICATION->launch(m_selectedInstance, false);
    }
}

void MainWindow::on_actionLaunchInstanceDemo_triggered()
{
    if (m_selectedInstance)
    {
        APPLICATION->launch(m_selectedInstance, false, true);
    }
}

void MainWindow::on_actionKillInstance_triggered()
{
    if(m_selectedInstance && m_selectedInstance->isRunning())
    {
        APPLICATION->kill(m_selectedInstance);
    }
}

void MainWindow::on_actionCreateInstanceShortcut_triggered()
{
    if (m_selectedInstance)
    {
        auto desktopPath = FS::getDesktopDir();
        if (desktopPath.isEmpty()) {
            // TODO come up with an alternative solution (open "save file" dialog)
            QMessageBox::critical(this, tr("Create instance shortcut"), tr("Couldn't find desktop?!"));
            return;
        }

#if defined(Q_OS_MACOS)
        QString appPath = QApplication::applicationFilePath();
        if (appPath.startsWith("/private/var/")) {
            QMessageBox::critical(this, tr("Create instance shortcut"), tr("The launcher is in the folder it was extracted from, therefore it cannot create shortcuts."));
            return;
        }

        if (FS::createShortcut(FS::PathCombine(desktopPath, m_selectedInstance->name()),
                           appPath, { "--launch", m_selectedInstance->id() },
                           m_selectedInstance->name(), "")) {
            QMessageBox::information(this, tr("Create instance shortcut"), tr("Created a shortcut to this instance on your desktop!"));
        }
        else
        {
            QMessageBox::critical(this, tr("Create instance shortcut"), tr("Failed to create instance shortcut!"));
        }
#elif defined(Q_OS_LINUX) || defined(Q_OS_FREEBSD) || defined(Q_OS_OPENBSD)
        QString appPath = QApplication::applicationFilePath();
        if (appPath.startsWith("/tmp/.mount_")) {
            // AppImage!
            appPath = QProcessEnvironment::systemEnvironment().value(QStringLiteral("APPIMAGE"));
            if (appPath.isEmpty())
            {
                QMessageBox::critical(this, tr("Create instance shortcut"), tr("Launcher is running as misconfigured AppImage? ($APPIMAGE environment variable is missing)"));
            }
            else if (appPath.endsWith("/"))
            {
                appPath.chop(1);
            }
        }

        auto icon = APPLICATION->icons()->icon(m_selectedInstance->iconKey());
        if (icon == nullptr)
        {
            icon = APPLICATION->icons()->icon("grass");
        }

        QString iconPath = FS::PathCombine(m_selectedInstance->instanceRoot(), "icon.png");

        QFile iconFile(iconPath);
        if (!iconFile.open(QFile::WriteOnly))
        {
            QMessageBox::critical(this, tr("Create instance shortcut"), tr("Failed to create icon for shortcut."));
            return;
        }
        bool success = icon->icon().pixmap(64, 64).save(&iconFile, "PNG");
        iconFile.close();

        if (!success)
        {
            iconFile.remove();
            QMessageBox::critical(this, tr("Create instance shortcut"), tr("Failed to create icon for shortcut."));
            return;
        }

        QString desktopFilePath = FS::PathCombine(desktopPath, m_selectedInstance->name() + ".desktop");
        QStringList args;
        if (DesktopServices::isFlatpak()) {
            QFileDialog fileDialog;
            // workaround to make sure the portal file dialog opens in the desktop directory
            fileDialog.setDirectoryUrl(desktopPath);
            desktopFilePath = fileDialog.getSaveFileName(
                            this, tr("Create Shortcut"), desktopFilePath,
                            tr("Desktop Entries (*.desktop)"));
            if (desktopFilePath.isEmpty())
                return; // file dialog canceled by user
            appPath = "flatpak";
            QString flatpakAppId = BuildConfig.LAUNCHER_DESKTOPFILENAME;
            flatpakAppId.remove(".desktop");
            args.append({ "run", flatpakAppId });
        }
        args.append({ "--launch", m_selectedInstance->id() });
        if (FS::createShortcut(desktopFilePath, appPath, args, m_selectedInstance->name(), iconPath)) {
            QMessageBox::information(this, tr("Create instance shortcut"), tr("Created a shortcut to this instance on your desktop!"));
        }
        else
        {
            iconFile.remove();
            QMessageBox::critical(this, tr("Create instance shortcut"), tr("Failed to create instance shortcut!"));
        }
#elif defined(Q_OS_WIN)
        auto icon = APPLICATION->icons()->icon(m_selectedInstance->iconKey());
        if (icon == nullptr)
        {
            icon = APPLICATION->icons()->icon("grass");
        }

        QString iconPath = FS::PathCombine(m_selectedInstance->instanceRoot(), "icon.ico");

        // part of fix for weird bug involving the window icon being replaced
        // dunno why it happens, but this 2-line fix seems to be enough, so w/e
        auto appIcon = APPLICATION->getThemedIcon("logo");

        QFile iconFile(iconPath);
        if (!iconFile.open(QFile::WriteOnly))
        {
            QMessageBox::critical(this, tr("Create instance shortcut"), tr("Failed to create icon for shortcut."));
            return;
        }
        bool success = icon->icon().pixmap(64, 64).save(&iconFile, "ICO");
        iconFile.close();

        // restore original window icon
        QGuiApplication::setWindowIcon(appIcon);

        if (!success)
        {
            iconFile.remove();
            QMessageBox::critical(this, tr("Create instance shortcut"), tr("Failed to create icon for shortcut."));
            return;
        }

        if (FS::createShortcut(FS::PathCombine(desktopPath, m_selectedInstance->name()),
                           QApplication::applicationFilePath(), { "--launch", m_selectedInstance->id() },
                           m_selectedInstance->name(), iconPath)) {
            QMessageBox::information(this, tr("Create instance shortcut"), tr("Created a shortcut to this instance on your desktop!"));
        }
        else
        {
            iconFile.remove();
            QMessageBox::critical(this, tr("Create instance shortcut"), tr("Failed to create instance shortcut!"));
        }
#else
        QMessageBox::critical(this, tr("Create instance shortcut"), tr("Not supported on your platform!"));
#endif
    }
}

void MainWindow::taskEnd()
{
    QObject *sender = QObject::sender();
    if (sender == m_versionLoadTask)
        m_versionLoadTask = NULL;

    sender->deleteLater();
}

void MainWindow::startTask(Task *task)
{
    connect(task, SIGNAL(succeeded()), SLOT(taskEnd()));
    connect(task, SIGNAL(failed(QString)), SLOT(taskEnd()));
    task->start();
}

void MainWindow::instanceChanged(const QModelIndex &current, const QModelIndex &previous)
{
    if (!current.isValid())
    {
        APPLICATION->settings()->set("SelectedInstance", QString());
        selectionBad();
        return;
    }
    if (m_selectedInstance) {
        disconnect(m_selectedInstance.get(), &BaseInstance::runningStatusChanged, this, &MainWindow::refreshCurrentInstance);
    }
    QString id = current.data(InstanceList::InstanceIDRole).toString();
    m_selectedInstance = APPLICATION->instances()->getInstanceById(id);
    if (m_selectedInstance)
    {
        ui->instanceToolBar->setEnabled(true);
        setInstanceActionsEnabled(true);
        ui->actionLaunchInstance->setEnabled(m_selectedInstance->canLaunch());
        ui->actionLaunchInstanceOffline->setEnabled(m_selectedInstance->canLaunch());
        ui->actionLaunchInstanceDemo->setEnabled(m_selectedInstance->canLaunch());

        // Disable demo-mode if not available.
        auto instance = dynamic_cast<MinecraftInstance*>(m_selectedInstance.get());
        if (instance) {
             ui->actionLaunchInstanceDemo->setEnabled(instance->supportsDemo());
        }

        ui->actionKillInstance->setEnabled(m_selectedInstance->isRunning());
        ui->actionExportInstance->setEnabled(m_selectedInstance->canExport());
        renameButton->setText(m_selectedInstance->name());
        m_statusLeft->setText(m_selectedInstance->getStatusbarDescription());
        updateStatusCenter();
        updateInstanceToolIcon(m_selectedInstance->iconKey());

        updateToolsMenu();

        APPLICATION->settings()->set("SelectedInstance", m_selectedInstance->id());

        connect(m_selectedInstance.get(), &BaseInstance::runningStatusChanged, this, &MainWindow::refreshCurrentInstance);
    }
    else
    {
        ui->instanceToolBar->setEnabled(false);
        setInstanceActionsEnabled(false);
        ui->actionLaunchInstance->setEnabled(false);
        ui->actionLaunchInstanceOffline->setEnabled(false);
        ui->actionLaunchInstanceDemo->setEnabled(false);
        ui->actionKillInstance->setEnabled(false);
        APPLICATION->settings()->set("SelectedInstance", QString());
        selectionBad();
        return;
    }
}

void MainWindow::instanceSelectRequest(QString id)
{
    setSelectedInstanceById(id);
}

void MainWindow::instanceDataChanged(const QModelIndex &topLeft, const QModelIndex &bottomRight)
{
    auto current = view->selectionModel()->currentIndex();
    QItemSelection test(topLeft, bottomRight);
    if (test.contains(current))
    {
        instanceChanged(current, current);
    }
}

void MainWindow::selectionBad()
{
    // start by reseting everything...
    m_selectedInstance = nullptr;

    statusBar()->clearMessage();
    ui->instanceToolBar->setEnabled(false);
    setInstanceActionsEnabled(false);
    updateToolsMenu();
    renameButton->setText(tr("Rename Instance"));
    updateInstanceToolIcon("grass");

    // ...and then see if we can enable the previously selected instance
    setSelectedInstanceById(APPLICATION->settings()->get("SelectedInstance").toString());
}

void MainWindow::checkInstancePathForProblems()
{
    QString instanceFolder = APPLICATION->settings()->get("InstanceDir").toString();
    if (FS::checkProblemticPathJava(QDir(instanceFolder)))
    {
        QMessageBox warning(this);
        warning.setText(tr("Your instance folder contains \'!\' and this is known to cause Java problems!"));
        warning.setInformativeText(
            tr(
                "You have now two options: <br/>"
                " - change the instance folder in the settings <br/>"
                " - move this installation of %1 to a different folder"
            ).arg(BuildConfig.LAUNCHER_DISPLAYNAME)
        );
        warning.setDefaultButton(QMessageBox::Ok);
        warning.exec();
    }
    auto tempFolderText = tr("This is a problem: <br/>"
                             " - The launcher will likely be deleted without warning by the operating system <br/>"
                             " - close the launcher now and extract it to a real location, not a temporary folder");
    QString pathfoldername = QDir(instanceFolder).absolutePath();
    if (pathfoldername.contains("Rar$", Qt::CaseInsensitive))
    {
        QMessageBox warning(this);
        warning.setText(tr("Your instance folder contains \'Rar$\' - that means you haven't extracted the launcher archive!"));
        warning.setInformativeText(tempFolderText);
        warning.setDefaultButton(QMessageBox::Ok);
        warning.exec();
    }
    else if (pathfoldername.startsWith(QDir::tempPath()) || pathfoldername.contains("/TempState/"))
    {
        QMessageBox warning(this);
        warning.setText(tr("Your instance folder is in a temporary folder: \'%1\'!").arg(QDir::tempPath()));
        warning.setInformativeText(tempFolderText);
        warning.setDefaultButton(QMessageBox::Ok);
        warning.exec();
    }
}

void MainWindow::updateStatusCenter()
{
    m_statusCenter->setVisible(APPLICATION->settings()->get("ShowGlobalGameTime").toBool());

    int timePlayed = APPLICATION->instances()->getTotalPlayTime();
    if (timePlayed > 0) {
        m_statusCenter->setText(tr("Total playtime: %1").arg(Time::prettifyDuration(timePlayed)));
    }
}
// "Instance actions" are actions that require an instance to be selected (i.e. "new instance" is not here)
// Actions that also require other conditions (e.g. a running instance) won't be changed.
void MainWindow::setInstanceActionsEnabled(bool enabled)
{
    ui->actionEditInstance->setEnabled(enabled);
    ui->actionChangeInstGroup->setEnabled(enabled);
    ui->actionViewSelectedInstFolder->setEnabled(enabled);
    ui->actionExportInstance->setEnabled(enabled);
    ui->actionDeleteInstance->setEnabled(enabled);
    ui->actionCopyInstance->setEnabled(enabled);
    ui->actionCreateInstanceShortcut->setEnabled(enabled);
}

void MainWindow::refreshCurrentInstance(bool running)
{
    auto current = view->selectionModel()->currentIndex();
    instanceChanged(current, current);
}