#include "MultiMC.h"
#include "BuildConfig.h"
#include "MainWindow.h"
#include "InstanceWindow.h"
#include "pages/BasePageProvider.h"
#include "pages/global/MultiMCPage.h"
#include "pages/global/MinecraftPage.h"
#include "pages/global/JavaPage.h"
#include "pages/global/ProxyPage.h"
#include "pages/global/ExternalToolsPage.h"
#include "pages/global/AccountListPage.h"
#include "pages/global/PasteEEPage.h"
#include "pages/global/PackagesPage.h"
#include "pages/global/CustomCommandsPage.h"

#include "themes/ITheme.h"
#include "themes/SystemTheme.h"
#include "themes/DarkTheme.h"
#include "themes/BrightTheme.h"
#include "themes/CustomTheme.h"

#include "setupwizard/SetupWizard.h"
#include "setupwizard/LanguageWizardPage.h"
#include "setupwizard/JavaWizardPage.h"
#include "setupwizard/AnalyticsWizardPage.h"

#include <iostream>
#include <QDir>
#include <QFileInfo>
#include <QNetworkAccessManager>
#include <QTranslator>
#include <QLibraryInfo>
#include <QStringList>
#include <QDebug>
#include <QStyleFactory>

#include "dialogs/CustomMessageBox.h"
#include "InstanceList.h"
#include "FolderInstanceProvider.h"

#include <minecraft/auth/MojangAccountList.h>
#include "icons/IconList.h"
#include "net/HttpMetaCache.h"
#include "net/URLConstants.h"
#include "Env.h"

#include "java/JavaUtils.h"

#include "updater/UpdateChecker.h"

#include "tools/JProfiler.h"
#include "tools/JVisualVM.h"
#include "tools/MCEditTool.h"

#include <xdgicon.h>
#include "settings/INISettingsObject.h"
#include "settings/Setting.h"

#include "translations/TranslationsModel.h"

#include <Commandline.h>
#include <FileSystem.h>
#include <DesktopServices.h>
#include <LocalPeer.h>

#include <ganalytics.h>
#include <sys.h>


#if defined Q_OS_WIN32
#ifndef WIN32_LEAN_AND_MEAN
#define WIN32_LEAN_AND_MEAN
#endif
#include <windows.h>
#include <stdio.h>
#endif

#define STRINGIFY(x) #x
#define TOSTRING(x) STRINGIFY(x)

static const QLatin1String liveCheckFile("live.check");

using namespace Commandline;

#define MACOS_HINT "If you are on macOS Sierra, you might have to move MultiMC.app to your /Applications or ~/Applications folder. "\
	"This usually fixes the problem and you can move the application elsewhere afterwards.\n"\
	"\n"

static void appDebugOutput(QtMsgType type, const QMessageLogContext &context, const QString &msg)
{
	const char *levels = "DWCFIS";
	const QString format("%1 %2 %3\n");

	qint64 msecstotal = MMC->timeSinceStart();
	qint64 seconds = msecstotal / 1000;
	qint64 msecs = msecstotal % 1000;
	QString foo;
	char buf[1025] = {0};
	::snprintf(buf, 1024, "%5lld.%03lld", seconds, msecs);

	QString out = format.arg(buf).arg(levels[type]).arg(msg);

	MMC->logFile->write(out.toUtf8());
	MMC->logFile->flush();
	QTextStream(stderr) << out.toLocal8Bit();
	fflush(stderr);
}

MultiMC::MultiMC(int &argc, char **argv) : QApplication(argc, argv)
{
#if defined Q_OS_WIN32
	// attach the parent console
	if(AttachConsole(ATTACH_PARENT_PROCESS))
	{
		// if attach succeeds, reopen and sync all the i/o
		if(freopen("CON", "w", stdout))
		{
			std::cout.sync_with_stdio();
		}
		if(freopen("CON", "w", stderr))
		{
			std::cerr.sync_with_stdio();
		}
		if(freopen("CON", "r", stdin))
		{
			std::cin.sync_with_stdio();
		}
		auto out = GetStdHandle (STD_OUTPUT_HANDLE);
		DWORD written;
		const char * endline = "\n";
		WriteConsole(out, endline, strlen(endline), &written, NULL);
		consoleAttached = true;
	}
#endif
	setOrganizationName("MultiMC");
	setOrganizationDomain("multimc.org");
	setApplicationName("MultiMC5");
	setApplicationDisplayName("MultiMC 5");
	setApplicationVersion(BuildConfig.printableVersionString());

	startTime = QDateTime::currentDateTime();

	// Don't quit on hiding the last window
	this->setQuitOnLastWindowClosed(false);

	// Commandline parsing
	QHash<QString, QVariant> args;
	{
		Parser parser(FlagStyle::GNU, ArgumentStyle::SpaceAndEquals);

		// --help
		parser.addSwitch("help");
		parser.addShortOpt("help", 'h');
		parser.addDocumentation("help", "display this help and exit.");
		// --version
		parser.addSwitch("version");
		parser.addShortOpt("version", 'V');
		parser.addDocumentation("version", "display program version and exit.");
		// --dir
		parser.addOption("dir");
		parser.addShortOpt("dir", 'd');
		parser.addDocumentation("dir", "use the supplied folder as MultiMC root instead of "
									   "the binary location (use '.' for current)");
		// --launch
		parser.addOption("launch");
		parser.addShortOpt("launch", 'l');
		parser.addDocumentation("launch", "launch the specified instance (by instance ID)");
		// --alive
		parser.addSwitch("alive");
		parser.addDocumentation("alive", "write a small '" + liveCheckFile + "' file after MultiMC starts");

		// parse the arguments
		try
		{
			args = parser.parse(arguments());
		}
		catch (ParsingError e)
		{
			std::cerr << "CommandLineError: " << e.what() << std::endl;
			std::cerr << "Try '%1 -h' to get help on MultiMC's command line parameters."
					  << std::endl;
			m_status = MultiMC::Failed;
			return;
		}

		// display help and exit
		if (args["help"].toBool())
		{
			std::cout << qPrintable(parser.compileHelp(arguments()[0]));
			m_status = MultiMC::Succeeded;
			return;
		}

		// display version and exit
		if (args["version"].toBool())
		{
			std::cout << "Version " << BuildConfig.printableVersionString().toStdString() << std::endl;
			std::cout << "Git " << BuildConfig.GIT_COMMIT.toStdString() << std::endl;
			m_status = MultiMC::Succeeded;
			return;
		}
	}
	m_instanceIdToLaunch = args["launch"].toString();
	m_liveCheck = args["alive"].toBool();

	QString origcwdPath = QDir::currentPath();
	QString binPath = applicationDirPath();
	QString adjustedBy;
	QString dataPath;
	// change folder
	QString dirParam = args["dir"].toString();
	if (!dirParam.isEmpty())
	{
		// the dir param. it makes multimc data path point to whatever the user specified
		// on command line
		adjustedBy += "Command line " + dirParam;
		dataPath = dirParam;
	}
	else
	{
#ifdef MULTIMC_LINUX_DATADIR
		QString xdgDataHome = QFile::decodeName(qgetenv("XDG_DATA_HOME"));
		if (xdgDataHome.isEmpty())
			xdgDataHome = QDir::homePath() + QLatin1String("/.local/share");
		dataPath = xdgDataHome + "/multimc";
		adjustedBy += "XDG standard " + dataPath;
#else
		dataPath = applicationDirPath();
		adjustedBy += "Fallback to binary path " + dataPath;
#endif
	}

	if (!FS::ensureFolderPathExists(dataPath))
	{
		showFatalErrorMessage(
			"MultiMC data folder could not be created.",
			"MultiMC data folder could not be created.\n"
			"\n"
#if defined(Q_OS_MAC)
			MACOS_HINT
#endif
			"Make sure you have the right permissions to the MultiMC data folder and any folder needed to access it.\n"
			"\n"
			"MultiMC cannot continue until you fix this problem."
		);
		return;
	}
	if (!QDir::setCurrent(dataPath))
	{
		showFatalErrorMessage(
			"MultiMC data folder could not be opened.",
			"MultiMC data folder could not be opened.\n"
			"\n"
#if defined(Q_OS_MAC)
			MACOS_HINT
#endif
			"Make sure you have the right permissions to the MultiMC data folder.\n"
			"\n"
			"MultiMC cannot continue until you fix this problem."
		);
		return;
	}

	/*
	 * Establish the mechanism for communication with an already running MultiMC that uses the same data path.
	 * If there is one, tell it what the user actually wanted to do and exit.
	 * We want to initialize this before logging to avoid messing with the log of a potential already running copy.
	 */
	auto appID = ApplicationId::fromPathAndVersion(QDir::currentPath(), BuildConfig.printableVersionString());
	{
		// FIXME: you can run the same binaries with multiple data dirs and they won't clash. This could cause issues for updates.
		m_peerInstance = new LocalPeer(this, appID);
		connect(m_peerInstance, &LocalPeer::messageReceived, this, &MultiMC::messageReceived);
		if(m_peerInstance->isClient())
		{
			if(m_instanceIdToLaunch.isEmpty())
			{
				m_peerInstance->sendMessage("activate", 2000);
			}
			else
			{
				m_peerInstance->sendMessage(m_instanceIdToLaunch, 2000);
			}
			m_status = MultiMC::Succeeded;
			return;
		}
	}

	// init the logger
	{
		static const QString logBase = "MultiMC-%0.log";
		auto moveFile = [](const QString &oldName, const QString &newName)
		{
			QFile::remove(newName);
			QFile::copy(oldName, newName);
			QFile::remove(oldName);
		};

		moveFile(logBase.arg(3), logBase.arg(4));
		moveFile(logBase.arg(2), logBase.arg(3));
		moveFile(logBase.arg(1), logBase.arg(2));
		moveFile(logBase.arg(0), logBase.arg(1));

		logFile = std::unique_ptr<QFile>(new QFile(logBase.arg(0)));
		if(!logFile->open(QIODevice::WriteOnly | QIODevice::Text | QIODevice::Truncate))
		{
			showFatalErrorMessage(
				"MultiMC data folder is not writable!",
				"MultiMC couldn't create a log file - the MultiMC data folder is not writable.\n"
				"\n"
	#if defined(Q_OS_MAC)
				MACOS_HINT
	#endif
				"Make sure you have write permissions to the MultiMC data folder.\n"
				"\n"
				"MultiMC cannot continue until you fix this problem."
			);
			return;
		}
		qInstallMessageHandler(appDebugOutput);
		qDebug() << "<> Log initialized.";
	}

	// Set up paths
	{
		// Root path is used for updates.
#ifdef Q_OS_LINUX
		QDir foo(FS::PathCombine(binPath, ".."));
		m_rootPath = foo.absolutePath();
#elif defined(Q_OS_WIN32)
		m_rootPath = binPath;
#elif defined(Q_OS_MAC)
		QDir foo(FS::PathCombine(binPath, "../.."));
		m_rootPath = foo.absolutePath();
		// on macOS, touch the root to force Finder to reload the .app metadata (and fix any icon change issues)
		FS::updateTimestamp(m_rootPath);
#endif

#ifdef MULTIMC_JARS_LOCATION
		ENV.setJarsPath( TOSTRING(MULTIMC_JARS_LOCATION) );
#endif

		qDebug() << "MultiMC 5, (c) 2013-2018 MultiMC Contributors";
		qDebug() << "Version                    : " << BuildConfig.printableVersionString();
		qDebug() << "Git commit                 : " << BuildConfig.GIT_COMMIT;
		qDebug() << "Git refspec                : " << BuildConfig.GIT_REFSPEC;
		if (adjustedBy.size())
		{
			qDebug() << "Work dir before adjustment : " << origcwdPath;
			qDebug() << "Work dir after adjustment  : " << QDir::currentPath();
			qDebug() << "Adjusted by                : " << adjustedBy;
		}
		else
		{
			qDebug() << "Work dir                   : " << QDir::currentPath();
		}
		qDebug() << "Binary path                : " << binPath;
		qDebug() << "Application root path      : " << m_rootPath;
		if(!m_instanceIdToLaunch.isEmpty())
		{
			qDebug() << "ID of instance to launch   : " << m_instanceIdToLaunch;
		}
		qDebug() << "<> Paths set.";
	}

	do // once
	{
		if(m_liveCheck)
		{
			QFile check(liveCheckFile);
			if(!check.open(QIODevice::WriteOnly | QIODevice::Truncate))
			{
				qWarning() << "Could not open" << liveCheckFile << "for writing!";
				break;
			}
			auto payload = appID.toString().toUtf8();
			if(check.write(payload) != payload.size())
			{
				qWarning() << "Could not write into" << liveCheckFile;
				check.remove();
				break;
			}
			check.close();
		}
	} while(false);

	// Initialize application settings
	{
		m_settings.reset(new INISettingsObject("multimc.cfg", this));
		// Updates
		m_settings->registerSetting("UpdateChannel", BuildConfig.VERSION_CHANNEL);
		m_settings->registerSetting("AutoUpdate", true);

		// Theming
		m_settings->registerSetting("IconTheme", QString("multimc"));
		m_settings->registerSetting("ApplicationTheme", QString("system"));

		// Notifications
		m_settings->registerSetting("ShownNotifications", QString());

		// Remembered state
		m_settings->registerSetting("LastUsedGroupForNewInstance", QString());

		QString defaultMonospace;
		int defaultSize = 11;
#ifdef Q_OS_WIN32
		defaultMonospace = "Courier";
		defaultSize = 10;
#elif defined(Q_OS_MAC)
		defaultMonospace = "Menlo";
#else
		defaultMonospace = "Monospace";
#endif

		// resolve the font so the default actually matches
		QFont consoleFont;
		consoleFont.setFamily(defaultMonospace);
		consoleFont.setStyleHint(QFont::Monospace);
		consoleFont.setFixedPitch(true);
		QFontInfo consoleFontInfo(consoleFont);
		QString resolvedDefaultMonospace = consoleFontInfo.family();
		QFont resolvedFont(resolvedDefaultMonospace);
		qDebug() << "Detected default console font:" << resolvedDefaultMonospace
			<< ", substitutions:" << resolvedFont.substitutions().join(',');

		m_settings->registerSetting("ConsoleFont", resolvedDefaultMonospace);
		m_settings->registerSetting("ConsoleFontSize", defaultSize);
		m_settings->registerSetting("ConsoleMaxLines", 100000);
		m_settings->registerSetting("ConsoleOverflowStop", true);

		// Folders
		m_settings->registerSetting("InstanceDir", "instances");
		m_settings->registerSetting({"CentralModsDir", "ModsDir"}, "mods");
		m_settings->registerSetting("IconsDir", "icons");

		// Editors
		m_settings->registerSetting("JsonEditor", QString());

		// Language
		m_settings->registerSetting("Language", QString());

		// Console
		m_settings->registerSetting("ShowConsole", false);
		m_settings->registerSetting("AutoCloseConsole", false);
		m_settings->registerSetting("ShowConsoleOnError", true);
		m_settings->registerSetting("LogPrePostOutput", true);

		// Window Size
		m_settings->registerSetting({"LaunchMaximized", "MCWindowMaximize"}, false);
		m_settings->registerSetting({"MinecraftWinWidth", "MCWindowWidth"}, 854);
		m_settings->registerSetting({"MinecraftWinHeight", "MCWindowHeight"}, 480);

		// Proxy Settings
		m_settings->registerSetting("ProxyType", "None");
		m_settings->registerSetting({"ProxyAddr", "ProxyHostName"}, "127.0.0.1");
		m_settings->registerSetting("ProxyPort", 8080);
		m_settings->registerSetting({"ProxyUser", "ProxyUsername"}, "");
		m_settings->registerSetting({"ProxyPass", "ProxyPassword"}, "");

		// Memory
		m_settings->registerSetting({"MinMemAlloc", "MinMemoryAlloc"}, 512);
		m_settings->registerSetting({"MaxMemAlloc", "MaxMemoryAlloc"}, 1024);
		m_settings->registerSetting("PermGen", 128);

		// Java Settings
		m_settings->registerSetting("JavaPath", "");
		m_settings->registerSetting("JavaTimestamp", 0);
		m_settings->registerSetting("JavaArchitecture", "");
		m_settings->registerSetting("JavaVersion", "");
		m_settings->registerSetting("LastHostname", "");
		m_settings->registerSetting("JvmArgs", "");

		// Minecraft launch method
		m_settings->registerSetting("MCLaunchMethod", "LauncherPart");

		// Wrapper command for launch
		m_settings->registerSetting("WrapperCommand", "");

		// Custom Commands
		m_settings->registerSetting({"PreLaunchCommand", "PreLaunchCmd"}, "");
		m_settings->registerSetting({"PostExitCommand", "PostExitCmd"}, "");

		// The cat
		m_settings->registerSetting("TheCat", false);

		m_settings->registerSetting("InstSortMode", "Name");
		m_settings->registerSetting("SelectedInstance", QString());

		// Window state and geometry
		m_settings->registerSetting("MainWindowState", "");
		m_settings->registerSetting("MainWindowGeometry", "");

		m_settings->registerSetting("ConsoleWindowState", "");
		m_settings->registerSetting("ConsoleWindowGeometry", "");

		m_settings->registerSetting("SettingsGeometry", "");

		m_settings->registerSetting("PagedGeometry", "");

		m_settings->registerSetting("NewInstanceGeometry", "");

		m_settings->registerSetting("UpdateDialogGeometry", "");

		// paste.ee API key
		m_settings->registerSetting("PasteEEAPIKey", "multimc");

		if(!BuildConfig.ANALYTICS_ID.isEmpty())
		{
			// Analytics
			m_settings->registerSetting("Analytics", true);
			m_settings->registerSetting("AnalyticsSeen", 0);
			m_settings->registerSetting("AnalyticsClientID", QString());
		}

		// Init page provider
		{
			m_globalSettingsProvider = std::make_shared<GenericPageProvider>(tr("Settings"));
			m_globalSettingsProvider->addPage<MultiMCPage>();
			m_globalSettingsProvider->addPage<MinecraftPage>();
			m_globalSettingsProvider->addPage<JavaPage>();
			m_globalSettingsProvider->addPage<CustomCommandsPage>();
			m_globalSettingsProvider->addPage<ProxyPage>();
			// m_globalSettingsProvider->addPage<PackagesPage>();
			m_globalSettingsProvider->addPage<ExternalToolsPage>();
			m_globalSettingsProvider->addPage<AccountListPage>();
			m_globalSettingsProvider->addPage<PasteEEPage>();
		}
		qDebug() << "<> Settings loaded.";
	}

	// load translations
	{
		m_translations.reset(new TranslationsModel("translations"));
		auto bcp47Name = m_settings->get("Language").toString();
		m_translations->selectLanguage(bcp47Name);
		qDebug() << "Your language is" << bcp47Name;
		qDebug() << "<> Translations loaded.";
	}

	// initialize the updater
	if(BuildConfig.UPDATER_ENABLED)
	{
		m_updateChecker.reset(new UpdateChecker(BuildConfig.CHANLIST_URL, BuildConfig.VERSION_CHANNEL, BuildConfig.VERSION_BUILD));
		qDebug() << "<> Updater started.";
	}

	// Instance icons
	{
		auto setting = MMC->settings()->getSetting("IconsDir");
		QStringList instFolders =
		{
			":/icons/multimc/32x32/instances/",
			":/icons/multimc/50x50/instances/",
			":/icons/multimc/128x128/instances/"
		};
		m_icons.reset(new IconList(instFolders, setting->get().toString()));
		connect(setting.get(), &Setting::SettingChanged,[&](const Setting &, QVariant value)
		{
			m_icons->directoryChanged(value.toString());
		});
		ENV.registerIconList(m_icons);
		qDebug() << "<> Instance icons intialized.";
	}

	// Icon themes
	{
		// TODO: icon themes and instance icons do not mesh well together. Rearrange and fix discrepancies!
		// set icon theme search path!
		auto searchPaths = QIcon::themeSearchPaths();
		searchPaths.append("iconthemes");
		QIcon::setThemeSearchPaths(searchPaths);
		qDebug() << "<> Icon themes initialized.";
	}

	// Initialize widget themes
	{
		auto insertTheme = [this](ITheme * theme)
		{
			m_themes.insert(std::make_pair(theme->id(), std::unique_ptr<ITheme>(theme)));
		};
		auto darkTheme = new DarkTheme();
		insertTheme(new SystemTheme());
		insertTheme(darkTheme);
		insertTheme(new BrightTheme());
		insertTheme(new CustomTheme(darkTheme, "custom"));
		qDebug() << "<> Widget themes initialized.";
	}

	// initialize and load all instances
	{
		auto InstDirSetting = m_settings->getSetting("InstanceDir");
		// instance path: check for problems with '!' in instance path and warn the user in the log
		// and rememer that we have to show him a dialog when the gui starts (if it does so)
		QString instDir = InstDirSetting->get().toString();
		qDebug() << "Instance path              : " << instDir;
		if (FS::checkProblemticPathJava(QDir(instDir)))
		{
			qWarning() << "Your instance path contains \'!\' and this is known to cause java problems";
		}
		m_instances.reset(new InstanceList(this));
		m_instanceFolder = new FolderInstanceProvider(m_settings, instDir);
		connect(InstDirSetting.get(), &Setting::SettingChanged, m_instanceFolder, &FolderInstanceProvider::on_InstFolderChanged);
		m_instances->addInstanceProvider(m_instanceFolder);
		qDebug() << "Loading Instances...";
		m_instances->loadList(true);
		qDebug() << "<> Instances loaded.";
	}

	// and accounts
	{
		m_accounts.reset(new MojangAccountList(this));
		qDebug() << "Loading accounts...";
		m_accounts->setListFilePath("accounts.json", true);
		m_accounts->loadList();
		qDebug() << "<> Accounts loaded.";
	}

	// init the http meta cache
	{
		ENV.initHttpMetaCache();
		qDebug() << "<> Cache initialized.";
	}

	// init proxy settings
	{
		QString proxyTypeStr = settings()->get("ProxyType").toString();
		QString addr = settings()->get("ProxyAddr").toString();
		int port = settings()->get("ProxyPort").value<qint16>();
		QString user = settings()->get("ProxyUser").toString();
		QString pass = settings()->get("ProxyPass").toString();
		ENV.updateProxySettings(proxyTypeStr, addr, port, user, pass);
		qDebug() << "<> Proxy settings done.";
	}

	// now we have network, download translation updates
	m_translations->downloadIndex();

	//FIXME: what to do with these?
	m_profilers.insert("jprofiler", std::shared_ptr<BaseProfilerFactory>(new JProfilerFactory()));
	m_profilers.insert("jvisualvm", std::shared_ptr<BaseProfilerFactory>(new JVisualVMFactory()));
	for (auto profiler : m_profilers.values())
	{
		profiler->registerSettings(m_settings);
	}

	// Create the MCEdit thing... why is this here?
	{
		m_mcedit.reset(new MCEditTool(m_settings));
	}

	connect(this, &MultiMC::aboutToQuit, [this](){
		if(m_instances)
		{
			// save any remaining instance state
			m_instances->saveNow();
		}
		if(logFile)
		{
			logFile->flush();
			logFile->close();
		}
	});

	{
		setIconTheme(settings()->get("IconTheme").toString());
		qDebug() << "<> Icon theme set.";
		setApplicationTheme(settings()->get("ApplicationTheme").toString(), true);
		qDebug() << "<> Application theme set.";
	}

	// Initialize analytics
	[this]()
	{
		const int analyticsVersion = 2;
		if(BuildConfig.ANALYTICS_ID.isEmpty())
		{
			return;
		}

		auto analyticsSetting = m_settings->getSetting("Analytics");
		connect(analyticsSetting.get(), &Setting::SettingChanged, this, &MultiMC::analyticsSettingChanged);
		QString clientID = m_settings->get("AnalyticsClientID").toString();
		if(clientID.isEmpty())
		{
			clientID = QUuid::createUuid().toString();
			clientID.remove(QLatin1Char('{'));
			clientID.remove(QLatin1Char('}'));
			m_settings->set("AnalyticsClientID", clientID);
		}
		m_analytics = new GAnalytics(BuildConfig.ANALYTICS_ID, clientID, analyticsVersion, this);
		m_analytics->setLogLevel(GAnalytics::Debug);
		m_analytics->setAnonymizeIPs(true);
		m_analytics->setNetworkAccessManager(&ENV.qnam());

		if(m_settings->get("AnalyticsSeen").toInt() < m_analytics->version())
		{
			qDebug() << "Analytics info not seen by user yet (or old version).";
			return;
		}
		if(!m_settings->get("Analytics").toBool())
		{
			qDebug() << "Analytics disabled by user.";
			return;
		}

		m_analytics->enable();
		qDebug() << "<> Initialized analytics with tid" << BuildConfig.ANALYTICS_ID;
	}();

	if(createSetupWizard())
	{
		return;
	}
	performMainStartupAction();
}

bool MultiMC::createSetupWizard()
{
	bool javaRequired = [&]()
	{
		QString currentHostName = QHostInfo::localHostName();
		QString oldHostName = settings()->get("LastHostname").toString();
		if (currentHostName != oldHostName)
		{
			settings()->set("LastHostname", currentHostName);
			return true;
		}
		QString currentJavaPath = settings()->get("JavaPath").toString();
		QString actualPath = FS::ResolveExecutable(currentJavaPath);
		if (actualPath.isNull())
		{
			return true;
		}
		return false;
	}();
	bool analyticsRequired = [&]()
	{
		if(BuildConfig.ANALYTICS_ID.isEmpty())
		{
			return false;
		}
		if (!settings()->get("Analytics").toBool())
		{
			return false;
		}
		if (settings()->get("AnalyticsSeen").toInt() < analytics()->version())
		{
			return true;
		}
		return false;
	}();
	bool languageRequired = [&]()
	{
		if (settings()->get("Language").toString().isEmpty())
			return true;
		return false;
	}();
	bool wizardRequired = javaRequired || analyticsRequired || languageRequired;

	if(wizardRequired)
	{
		m_setupWizard = new SetupWizard(nullptr);
		if (languageRequired)
		{
			m_setupWizard->addPage(new LanguageWizardPage(m_setupWizard));
		}
		if (javaRequired)
		{
			m_setupWizard->addPage(new JavaWizardPage(m_setupWizard));
		}
		if(analyticsRequired)
		{
			m_setupWizard->addPage(new AnalyticsWizardPage(m_setupWizard));
		}
		connect(m_setupWizard, &QDialog::finished, this, &MultiMC::setupWizardFinished);
		m_setupWizard->show();
		return true;
	}
	return false;
}

void MultiMC::setupWizardFinished(int status)
{
	qDebug() << "Wizard result =" << status;
	performMainStartupAction();
}

void MultiMC::performMainStartupAction()
{
	m_status = MultiMC::Initialized;
	if(!m_instanceIdToLaunch.isEmpty())
	{
		auto inst = instances()->getInstanceById(m_instanceIdToLaunch);
		if(inst)
		{
			qDebug() << "<> Instance launching:" << m_instanceIdToLaunch;
			launch(inst, true, nullptr);
			return;
		}
	}
	if(!m_mainWindow)
	{
		// normal main window
		showMainWindow(false);
		qDebug() << "<> Main window shown.";
	}
}

void MultiMC::showFatalErrorMessage(const QString& title, const QString& content)
{
	m_status = MultiMC::Failed;
	auto dialog = CustomMessageBox::selectable(nullptr, title, content, QMessageBox::Critical);
	dialog->exec();
}

MultiMC::~MultiMC()
{
	// kill the other globals.
	Env::dispose();

	// Shut down logger by setting the logger function to nothing
	qInstallMessageHandler(nullptr);

#if defined Q_OS_WIN32
	// Detach from Windows console
	if(consoleAttached)
	{
		fclose(stdout);
		fclose(stdin);
		fclose(stderr);
		FreeConsole();
	}
#endif
}

void MultiMC::messageReceived(const QString& message)
{
	if(status() != Initialized)
	{
		qDebug() << "Received message" << message << "while still initializing. It will be ignored.";
		return;
	}
	if(message == "activate")
	{
		showMainWindow();
	}
	else
	{
		auto inst = instances()->getInstanceById(message);
		if(inst)
		{
			launch(inst, true, nullptr);
		}
	}
}

void MultiMC::analyticsSettingChanged(const Setting&, QVariant value)
{
	if(!m_analytics)
		return;
	bool enabled = value.toBool();
	if(enabled)
	{
		qDebug() << "Analytics enabled by user.";
	}
	else
	{
		qDebug() << "Analytics disabled by user.";
	}
	m_analytics->enable(enabled);
}

std::shared_ptr<TranslationsModel> MultiMC::translations()
{
	return m_translations;
}

std::shared_ptr<JavaInstallList> MultiMC::javalist()
{
	if (!m_javalist)
	{
		m_javalist.reset(new JavaInstallList());
	}
	return m_javalist;
}

std::vector<ITheme *> MultiMC::getValidApplicationThemes()
{
	std::vector<ITheme *> ret;
	auto iter = m_themes.cbegin();
	while (iter != m_themes.cend())
	{
		ret.push_back((*iter).second.get());
		iter++;
	}
	return ret;
}

void MultiMC::setApplicationTheme(const QString& name, bool initial)
{
	auto systemPalette = qApp->palette();
	auto themeIter = m_themes.find(name);
	if(themeIter != m_themes.end())
	{
		auto & theme = (*themeIter).second;
		theme->apply(initial);
	}
	else
	{
		qWarning() << "Tried to set invalid theme:" << name;
	}
}

void MultiMC::setIconTheme(const QString& name)
{
	XdgIcon::setThemeName(name);
}

QIcon MultiMC::getThemedIcon(const QString& name)
{
	return XdgIcon::fromTheme(name);
}

bool MultiMC::openJsonEditor(const QString &filename)
{
	const QString file = QDir::current().absoluteFilePath(filename);
	if (m_settings->get("JsonEditor").toString().isEmpty())
	{
		return DesktopServices::openUrl(QUrl::fromLocalFile(file));
	}
	else
	{
		//return DesktopServices::openFile(m_settings->get("JsonEditor").toString(), file);
		return DesktopServices::run(m_settings->get("JsonEditor").toString(), {file});
	}
}

bool MultiMC::launch(InstancePtr instance, bool online, BaseProfilerFactory *profiler)
{
	if(m_updateRunning)
	{
		qDebug() << "Cannot launch instances while an update is running.";
	}
	else if(instance->canLaunch())
	{
		auto & extras = m_instanceExtras[instance->id()];
		auto & window = extras.window;
		if(window)
		{
			if(!window->saveAll())
			{
				return false;
			}
		}
		auto & controller = extras.controller;
		controller.reset(new LaunchController());
		controller->setInstance(instance);
		controller->setOnline(online);
		controller->setProfiler(profiler);
		if(window)
		{
			controller->setParentWidget(window);
		}
		else if(m_mainWindow)
		{
			controller->setParentWidget(m_mainWindow);
		}
		connect(controller.get(), &LaunchController::succeeded, this, &MultiMC::controllerSucceeded);
		connect(controller.get(), &LaunchController::failed, this, &MultiMC::controllerFailed);
		addRunningInstance();
		controller->start();
		return true;
	}
	else if (instance->isRunning())
	{
		showInstanceWindow(instance, "console");
		return true;
	}
	else if (instance->canEdit())
	{
		showInstanceWindow(instance);
		return true;
	}
	return false;
}

bool MultiMC::kill(InstancePtr instance)
{
	if (!instance->isRunning())
	{
		qWarning() << "Attempted to kill instance" << instance->id() << "which isn't running.";
		return false;
	}
	auto & extras = m_instanceExtras[instance->id()];
	// NOTE: copy of the shared pointer keeps it alive
	auto controller = extras.controller;
	if(controller)
	{
		return controller->abort();
	}
	return true;
}

void MultiMC::addRunningInstance()
{
	m_runningInstances ++;
	if(m_runningInstances == 1)
	{
		emit updateAllowedChanged(false);
	}
}

void MultiMC::subRunningInstance()
{
	if(m_runningInstances == 0)
	{
		qCritical() << "Something went really wrong and we now have less than 0 running instances... WTF";
		return;
	}
	m_runningInstances --;
	if(m_runningInstances == 0)
	{
		emit updateAllowedChanged(true);
	}
}

bool MultiMC::shouldExitNow() const
{
	return m_runningInstances == 0 && m_openWindows == 0;
}

bool MultiMC::updatesAreAllowed()
{
	return m_runningInstances == 0;
}

void MultiMC::updateIsRunning(bool running)
{
	m_updateRunning = running;
}


void MultiMC::controllerSucceeded()
{
	auto controller = qobject_cast<LaunchController *>(QObject::sender());
	if(!controller)
		return;
	auto id = controller->id();
	auto & extras = m_instanceExtras[id];

	// on success, do...
	if (controller->instance()->settings()->get("AutoCloseConsole").toBool())
	{
		if(extras.window)
		{
			extras.window->close();
		}
	}
	extras.controller.reset();
	subRunningInstance();

	// quit when there are no more windows.
	if(shouldExitNow())
	{
		m_status = Status::Succeeded;
		exit(0);
	}
}

void MultiMC::controllerFailed(const QString& error)
{
	Q_UNUSED(error);
	auto controller = qobject_cast<LaunchController *>(QObject::sender());
	if(!controller)
		return;
	auto id = controller->id();
	auto & extras = m_instanceExtras[id];

	// on failure, do... nothing
	extras.controller.reset();
	subRunningInstance();

	// quit when there are no more windows.
	if(shouldExitNow())
	{
		m_status = Status::Failed;
		exit(1);
	}
}

MainWindow* MultiMC::showMainWindow(bool minimized)
{
	if(m_mainWindow)
	{
		m_mainWindow->setWindowState(m_mainWindow->windowState() & ~Qt::WindowMinimized);
		m_mainWindow->raise();
		m_mainWindow->activateWindow();
	}
	else
	{
		m_mainWindow = new MainWindow();
		m_mainWindow->restoreState(QByteArray::fromBase64(MMC->settings()->get("MainWindowState").toByteArray()));
		m_mainWindow->restoreGeometry(QByteArray::fromBase64(MMC->settings()->get("MainWindowGeometry").toByteArray()));
		if(minimized)
		{
			m_mainWindow->showMinimized();
		}
		else
		{
			m_mainWindow->show();
		}

		m_mainWindow->checkInstancePathForProblems();
		connect(this, &MultiMC::updateAllowedChanged, m_mainWindow, &MainWindow::updatesAllowedChanged);
		connect(m_mainWindow, &MainWindow::isClosing, this, &MultiMC::on_windowClose);
		m_openWindows++;
	}
	// FIXME: move this somewhere else...
	if(m_analytics)
	{
		auto windowSize = m_mainWindow->size();
		auto sizeString = QString("%1x%2").arg(windowSize.width()).arg(windowSize.height());
		qDebug() << "Viewport size" << sizeString;
		m_analytics->setViewportSize(sizeString);
		/*
		 * cm1 = java min heap [MB]
		 * cm2 = java max heap [MB]
		 * cm3 = system RAM [MB]
		 *
		 * cd1 = java version
		 * cd2 = java architecture
		 * cd3 = system architecture
		 * cd4 = CPU architecture
		 */
		QVariantMap customValues;
		int min = m_settings->get("MinMemAlloc").toInt();
		int max = m_settings->get("MaxMemAlloc").toInt();
		if(min < max)
		{
			customValues["cm1"] = min;
			customValues["cm2"] = max;
		}
		else
		{
			customValues["cm1"] = max;
			customValues["cm2"] = min;
		}

		constexpr uint64_t Mega = 1024ull * 1024ull;
		int ramSize = int(Sys::getSystemRam() / Mega);
		qDebug() << "RAM size is" << ramSize << "MB";
		customValues["cm3"] = ramSize;

		customValues["cd1"] = m_settings->get("JavaVersion");
		customValues["cd2"] = m_settings->get("JavaArchitecture");
		customValues["cd3"] = Sys::isSystem64bit() ? "64":"32";
		customValues["cd4"] = Sys::isCPU64bit() ? "64":"32";
		auto kernelInfo = Sys::getKernelInfo();
		customValues["cd5"] = kernelInfo.kernelName;
		customValues["cd6"] = kernelInfo.kernelVersion;
		auto distInfo = Sys::getDistributionInfo();
		if(!distInfo.distributionName.isEmpty())
		{
			customValues["cd7"] = distInfo.distributionName;
		}
		if(!distInfo.distributionVersion.isEmpty())
		{
			customValues["cd8"] = distInfo.distributionVersion;
		}
		m_analytics->sendScreenView("Main Window", customValues);
	}
	return m_mainWindow;
}

InstanceWindow *MultiMC::showInstanceWindow(InstancePtr instance, QString page)
{
	if(!instance)
		return nullptr;
	auto id = instance->id();
	auto & extras = m_instanceExtras[id];
	auto & window = extras.window;

	if(window)
	{
		window->raise();
		window->activateWindow();
	}
	else
	{
		window = new InstanceWindow(instance);
		m_openWindows ++;
		connect(window, &InstanceWindow::isClosing, this, &MultiMC::on_windowClose);
	}
	if(!page.isEmpty())
	{
		window->selectPage(page);
	}
	if(extras.controller)
	{
		extras.controller->setParentWidget(window);
	}
	return window;
}

void MultiMC::on_windowClose()
{
	m_openWindows--;
	auto instWindow = qobject_cast<InstanceWindow *>(QObject::sender());
	if(instWindow)
	{
		auto & extras = m_instanceExtras[instWindow->instanceId()];
		extras.window = nullptr;
		if(extras.controller)
		{
			extras.controller->setParentWidget(m_mainWindow);
		}
	}
	auto mainWindow = qobject_cast<MainWindow *>(QObject::sender());
	if(mainWindow)
	{
		m_mainWindow = nullptr;
	}
	// quit when there are no more windows.
	if(shouldExitNow())
	{
		exit(0);
	}
}