/*
 * firstlaunch_moc.cpp, part of VCMI engine
 *
 * Authors: listed in file AUTHORS in main folder
 *
 * License: GNU General Public License v2.0 or later
 * Full text of license available in license.txt file, in main folder
 *
 */
#include "StdInc.h"
#include "firstlaunch_moc.h"
#include "ui_firstlaunch_moc.h"

#include "mainwindow_moc.h"
#include "modManager/cmodlistview_moc.h"

#include "../../lib/CConfigHandler.h"
#include "../../lib/CGeneralTextHandler.h"
#include "../../lib/Languages.h"
#include "../../lib/VCMIDirs.h"
#include "../../lib/filesystem/Filesystem.h"
#include "../languages.h"

#ifdef ENABLE_INNOEXTRACT
#include "cli/extract.hpp"
#endif

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

	enterSetup();
	activateTabLanguage();

	ui->lineEditDataSystem->setText(pathToQString(boost::filesystem::absolute(VCMIDirs::get().dataPaths().front())));
	ui->lineEditDataUser->setText(pathToQString(boost::filesystem::absolute(VCMIDirs::get().userDataPath())));

#ifndef ENABLE_INNOEXTRACT
	ui->pushButtonGogInstall->hide();
#endif
}

void FirstLaunchView::on_buttonTabLanguage_clicked()
{
	activateTabLanguage();
}

void FirstLaunchView::on_buttonTabHeroesData_clicked()
{
	activateTabHeroesData();
}

void FirstLaunchView::on_buttonTabModPreset_clicked()
{
	activateTabModPreset();
}

void FirstLaunchView::on_listWidgetLanguage_currentRowChanged(int currentRow)
{
	languageSelected(ui->listWidgetLanguage->item(currentRow)->data(Qt::UserRole).toString());
}

void FirstLaunchView::changeEvent(QEvent * event)
{
	if(event->type() == QEvent::LanguageChange)
	{
		ui->retranslateUi(this);
		Languages::fillLanguages(ui->listWidgetLanguage, false);
	}
	QWidget::changeEvent(event);
}

void FirstLaunchView::on_pushButtonLanguageNext_clicked()
{
	activateTabHeroesData();
}

void FirstLaunchView::on_pushButtonDataNext_clicked()
{
	activateTabModPreset();
}

void FirstLaunchView::on_pushButtonDataBack_clicked()
{
	activateTabLanguage();
}

void FirstLaunchView::on_pushButtonDataSearch_clicked()
{
	heroesDataUpdate();
}

void FirstLaunchView::on_pushButtonDataCopy_clicked()
{
	copyHeroesData();
}

void FirstLaunchView::on_pushButtonDataHelp_clicked()
{
	static const QUrl vcmibuilderWiki("https://github.com/vcmi/vcmi/blob/master/docs/players/Installation_Linux.md#install-data-using-vcmibuilder-script");
	QDesktopServices::openUrl(vcmibuilderWiki);
}

void FirstLaunchView::on_pushButtonGogInstall_clicked()
{
	extractGogData();
}

void FirstLaunchView::on_comboBoxLanguage_currentIndexChanged(int index)
{
	forceHeroesLanguage(ui->comboBoxLanguage->itemData(index).toString());
}

void FirstLaunchView::enterSetup()
{
	Languages::fillLanguages(ui->listWidgetLanguage, false);
}

void FirstLaunchView::setSetupProgress(int progress)
{
	ui->buttonTabLanguage->setDisabled(progress < 1);
	ui->buttonTabHeroesData->setDisabled(progress < 2);
	ui->buttonTabModPreset->setDisabled(progress < 3);
}

void FirstLaunchView::activateTabLanguage()
{
	setSetupProgress(1);
	ui->installerTabs->setCurrentIndex(0);
	ui->buttonTabLanguage->setChecked(true);
	ui->buttonTabHeroesData->setChecked(false);
	ui->buttonTabModPreset->setChecked(false);
}

void FirstLaunchView::activateTabHeroesData()
{
	setSetupProgress(2);
	ui->installerTabs->setCurrentIndex(1);
	ui->buttonTabLanguage->setChecked(false);
	ui->buttonTabHeroesData->setChecked(true);
	ui->buttonTabModPreset->setChecked(false);

	if(!hasVCMIBuilderScript)
	{
		ui->pushButtonDataHelp->hide();
		ui->labelDataHelp->hide();
	}
	if(heroesDataUpdate())
		return;

	QString installPath = getHeroesInstallDir();
	if(!installPath.isEmpty())
	{
		auto reply = QMessageBox::question(this, tr("Heroes III installation found!"), tr("Copy data to VCMI folder?"), QMessageBox::Yes | QMessageBox::No);
		if(reply == QMessageBox::Yes)
			copyHeroesData(installPath);
	}
}

void FirstLaunchView::activateTabModPreset()
{
	setSetupProgress(3);
	ui->installerTabs->setCurrentIndex(2);
	ui->buttonTabLanguage->setChecked(false);
	ui->buttonTabHeroesData->setChecked(false);
	ui->buttonTabModPreset->setChecked(true);

	modPresetUpdate();
}

void FirstLaunchView::exitSetup()
{
	if(auto * mainWindow = dynamic_cast<MainWindow *>(QApplication::activeWindow()))
		mainWindow->exitSetup();
}

// Tab Language
void FirstLaunchView::languageSelected(const QString & selectedLanguage)
{
	Settings node = settings.write["general"]["language"];
	node->String() = selectedLanguage.toStdString();

	if(auto * mainWindow = dynamic_cast<MainWindow *>(QApplication::activeWindow()))
		mainWindow->updateTranslation();
}

bool FirstLaunchView::heroesDataUpdate()
{
	bool detected = heroesDataDetect();
	if(detected)
		heroesDataDetected();
	else
		heroesDataMissing();
	return detected;
}

void FirstLaunchView::heroesDataMissing()
{
	QPalette newPalette = palette();
	newPalette.setColor(QPalette::Base, QColor(200, 50, 50));
	ui->lineEditDataSystem->setPalette(newPalette);
	ui->lineEditDataUser->setPalette(newPalette);

	ui->pushButtonDataSearch->setVisible(true);
	ui->pushButtonDataCopy->setVisible(true);

	ui->labelDataSearch->setVisible(true);
	ui->labelDataCopy->setVisible(true);

	ui->labelDataFound->setVisible(false);
	ui->pushButtonDataNext->setEnabled(false);

	if(hasVCMIBuilderScript)
	{
		ui->pushButtonDataHelp->setVisible(true);
		ui->labelDataHelp->setVisible(true);
	}
}

void FirstLaunchView::heroesDataDetected()
{
	QPalette newPalette = palette();
	newPalette.setColor(QPalette::Base, QColor(50, 200, 50));
	ui->lineEditDataSystem->setPalette(newPalette);
	ui->lineEditDataUser->setPalette(newPalette);

	ui->pushButtonDataSearch->setVisible(false);
	ui->pushButtonDataCopy->setVisible(false);

	ui->labelDataSearch->setVisible(false);
	ui->labelDataCopy->setVisible(false);
	ui->pushButtonGogInstall->setVisible(false);

	if(hasVCMIBuilderScript)
	{
		ui->pushButtonDataHelp->setVisible(false);
		ui->labelDataHelp->setVisible(false);
	}

	ui->labelDataFound->setVisible(true);
	ui->pushButtonDataNext->setEnabled(true);

	heroesLanguageUpdate();
}

// Tab Heroes III Data
bool FirstLaunchView::heroesDataDetect()
{
	// user might have copied files to one of our data path.
	// perform full reinitialization of virtual filesystem
	CResourceHandler::destroy();
	CResourceHandler::initialize();
	CResourceHandler::load("config/filesystem.json");

	// use file from lod archive to check presence of H3 data. Very rough estimate, but will work in majority of cases
	bool heroesDataFoundROE = CResourceHandler::get()->existsResource(ResourcePath("DATA/GENRLTXT.TXT"));
	bool heroesDataFoundSOD = CResourceHandler::get()->existsResource(ResourcePath("DATA/TENTCOLR.TXT"));

	return heroesDataFoundROE && heroesDataFoundSOD;
}

void FirstLaunchView::heroesLanguageUpdate()
{
	Languages::fillLanguages(ui->comboBoxLanguage, true);

	QString language = Languages::getHeroesDataLanguage();
	bool success = !language.isEmpty();

	ui->labelDataFailure->setVisible(!success);
	ui->labelDataSuccess->setVisible(success);
}

void FirstLaunchView::forceHeroesLanguage(const QString & language)
{
	Settings node = settings.write["general"]["gameDataLanguage"];

	node->String() = language.toStdString();
}

QString FirstLaunchView::getHeroesInstallDir()
{
#ifdef VCMI_WINDOWS
	QString gogPath = QSettings("HKEY_LOCAL_MACHINE\\SOFTWARE\\GOG.com\\Games\\1207658787", QSettings::NativeFormat).value("path").toString();
	if(!gogPath.isEmpty())
		return gogPath;

	QString cdPath = QSettings("HKEY_LOCAL_MACHINE\\SOFTWARE\\New World Computing\\Heroes of Might and Magic® III\\1.0", QSettings::NativeFormat).value("AppPath").toString();
	if(!cdPath.isEmpty())
		return cdPath;
#endif
	return QString{};
}

void FirstLaunchView::extractGogData()
{
#ifdef ENABLE_INNOEXTRACT

	auto fileSelection = [this](QString type, QString filter, QString startPath = {}) {
		QString titleSel = tr("Select %1 file...", "param is file extension").arg(filter);
		QString titleErr = tr("You have to select %1 file!", "param is file extension").arg(filter);
#if defined(VCMI_MOBILE)
		filter = "GOG file (*.*)";
		QMessageBox::information(this, tr("File selection"), titleSel);
#endif
		QString file = QFileDialog::getOpenFileName(this, titleSel, startPath.isEmpty() ? QDir::homePath() : startPath, filter);
		if(file.isEmpty())
			return QString{};
		else if(!file.endsWith("." + type, Qt::CaseInsensitive))
		{
			QMessageBox::critical(this, tr("Invalid file selected"), titleErr);
			return QString{};
		}

		return file;
	};

	QString fileExe = fileSelection("exe", tr("GOG installer") + " (*.exe)");
	if(fileExe.isEmpty())
		return;
	QString fileBin = fileSelection("bin", tr("GOG data") + " (*.bin)", QFileInfo(fileExe).absolutePath());
	if(fileBin.isEmpty())
		return;

	ui->pushButtonGogInstall->setText(tr("Installing... Please wait!"));
	QPalette pal = ui->pushButtonGogInstall->palette();
	pal.setColor(QPalette::Button, QColor(Qt::yellow));
	ui->pushButtonGogInstall->setAutoFillBackground(true);
	ui->pushButtonGogInstall->setPalette(pal);
	ui->pushButtonGogInstall->update();
	ui->pushButtonGogInstall->repaint();

	QTimer::singleShot(100, this, [this, fileExe, fileBin](){ // background to make sure FileDialog is closed...
		QTemporaryDir dir;
		if(dir.isValid()) {
			QDir tempDir{dir.path()};

			QString tmpFileExe = dir.filePath("h3_gog.exe");
			QFile(fileExe).copy(tmpFileExe);
			QFile(fileBin).copy(dir.filePath("h3_gog-1.bin"));

			::extract_options o;
			o.extract = true;

			// standard settings
			o.gog_galaxy = true;
			o.codepage = 0U;
			o.output_dir = dir.path().toStdString();
			o.extract_temp = true;
			o.extract_unknown = true;
			o.filenames.set_expand(true);

			o.preserve_file_times = true; // also correctly closes file -> without it: on Windows the files are not written completly

			process_file(tmpFileExe.toStdString(), o);

			QStringList dirData = tempDir.entryList({"data"}, QDir::Filter::Dirs);
			if(dirData.empty() || QDir(tempDir.filePath(dirData.front())).entryList({"*.lod"}, QDir::Filter::Files).empty())
			{
				QMessageBox::critical(this, tr("No Heroes III data!"), tr("Selected files do not contain Heroes III data!"), QMessageBox::Ok, QMessageBox::Ok);
				ui->pushButtonGogInstall->setText(tr("Install GOG files"));
				return;
			}
			copyHeroesData(dir.path(), true);
		}
	});
#endif
}

void FirstLaunchView::copyHeroesData(const QString & path, bool move)
{
	QDir sourceRoot = QDir(path);
	
	if(path.isEmpty())
		sourceRoot.setPath(QFileDialog::getExistingDirectory(this, {}, {}, QFileDialog::ShowDirsOnly | QFileDialog::DontResolveSymlinks));

	if(!sourceRoot.exists())
		return;

	if (sourceRoot.dirName().compare("data", Qt::CaseInsensitive) == 0)
	{
		// We got Data folder. Possibly user selected "Data" folder of Heroes III install. Check whether valid data might exist 1 level above

		QStringList dirData = sourceRoot.entryList({"data"}, QDir::Filter::Dirs);
		if (dirData.empty())
		{
			// This is "Data" folder without any "Data" folders inside. Try to check for data 1 level above
			sourceRoot.cdUp();
		}
	}

	QStringList dirData = sourceRoot.entryList({"data"}, QDir::Filter::Dirs);
	QStringList dirMaps = sourceRoot.entryList({"maps"}, QDir::Filter::Dirs);
	QStringList dirMp3 = sourceRoot.entryList({"mp3"}, QDir::Filter::Dirs);

	if(dirData.empty())
	{
		QMessageBox::critical(this, tr("Heroes III data not found!"), tr("Failed to detect valid Heroes III data in chosen directory.\nPlease select directory with installed Heroes III data."));
		return;
	}

	QDir sourceData = sourceRoot.filePath(dirData.front());
	QStringList roeFiles = sourceData.entryList({"*.lod"}, QDir::Filter::Files);
	QStringList sodFiles = sourceData.entryList({"H3ab*.lod"}, QDir::Filter::Files);
	QStringList hdFiles = sourceData.entryList({"*.pak"}, QDir::Filter::Files);

	if(sodFiles.empty())
	{
		if (roeFiles.empty())
		{
			// Directory structure is correct (Data/Maps/Mp3) but no .lod archives that should be present in any install
			QMessageBox::critical(this, tr("Heroes III data not found!"), tr("Failed to detect valid Heroes III data in chosen directory.\nPlease select directory with installed Heroes III data."));
			return;
		}

		if (!hdFiles.empty())
		{
			// HD Edition contains only RoE data so we can't use even unmodified files from it
			QMessageBox::critical(this, tr("Heroes III data not found!"), tr("Heroes III: HD Edition files are not supported by VCMI.\nPlease select directory with Heroes III: Complete Edition or Heroes III: Shadow of Death."));
			return;
		}

		// RoE or some other unsupported edition. Demo version?
		QMessageBox::critical(this, tr("Heroes III data not found!"), tr("Unknown or unsupported Heroes III version found.\nPlease select directory with Heroes III: Complete Edition or Heroes III: Shadow of Death."));
		return;
	}

	QStringList copyDirectories;

	copyDirectories += dirData.front();
	if (!dirMaps.empty())
		copyDirectories += dirMaps.front();

	if (!dirMp3.empty())
		copyDirectories += dirMp3.front();

	QDir targetRoot = pathToQString(VCMIDirs::get().userDataPath());

	for(const QString & dirName : copyDirectories)
	{
		QDir sourceDir = sourceRoot.filePath(dirName);
		QDir targetDir = targetRoot.filePath(dirName);

		if(!targetRoot.exists(dirName))
			targetRoot.mkdir(dirName);

		for(const QString & filename : sourceDir.entryList(QDir::Filter::Files))
		{
			QFile sourceFile(sourceDir.filePath(filename));
			if(move)
				sourceFile.rename(targetDir.filePath(filename));
			else
				sourceFile.copy(targetDir.filePath(filename));
		}
	}

	heroesDataUpdate();
}

// Tab Mod Preset
void FirstLaunchView::modPresetUpdate()
{
	bool translationExists = !findTranslationModName().isEmpty();

	ui->labelPresetLanguage->setVisible(translationExists);
	ui->labelPresetLanguageDescr->setVisible(translationExists);
	ui->checkBoxPresetLanguage->setVisible(translationExists);

	ui->checkBoxPresetLanguage->setEnabled(checkCanInstallTranslation());
	ui->checkBoxPresetExtras->setEnabled(checkCanInstallExtras());
	ui->checkBoxPresetHota->setEnabled(checkCanInstallHota());
	ui->checkBoxPresetWog->setEnabled(checkCanInstallWog());

	// we can't install anything - either repository checkout is off or all recommended mods are already installed
	if (!checkCanInstallTranslation() && !checkCanInstallExtras() && !checkCanInstallHota() && !checkCanInstallWog())
		exitSetup();
}

QString FirstLaunchView::findTranslationModName()
{
	if (!getModView())
		return QString();

	QString preferredlanguage = QString::fromStdString(settings["general"]["language"].String());
	QString installedlanguage = QString::fromStdString(settings["session"]["language"].String());

	if (preferredlanguage == installedlanguage)
		return QString();

	return getModView()->getTranslationModName(preferredlanguage);
}

bool FirstLaunchView::checkCanInstallTranslation()
{
	QString modName = findTranslationModName();

	if(modName.isEmpty())
		return false;

	return checkCanInstallMod(modName);
}

bool FirstLaunchView::checkCanInstallWog()
{
	return checkCanInstallMod("wake-of-gods");
}

bool FirstLaunchView::checkCanInstallHota()
{
	return checkCanInstallMod("hota");
}

bool FirstLaunchView::checkCanInstallExtras()
{
	return checkCanInstallMod("vcmi-extras");
}

CModListView * FirstLaunchView::getModView()
{
	auto * mainWindow = dynamic_cast<MainWindow *>(QApplication::activeWindow());

	assert(mainWindow);
	if (!mainWindow)
		return nullptr;

	return mainWindow->getModView();
}

bool FirstLaunchView::checkCanInstallMod(const QString & modID)
{
	return getModView() && getModView()->isModAvailable(modID);
}

void FirstLaunchView::on_pushButtonPresetBack_clicked()
{
	activateTabHeroesData();
}

void FirstLaunchView::on_pushButtonPresetNext_clicked()
{
	QStringList modsToInstall;

	if (ui->checkBoxPresetLanguage->isChecked() && checkCanInstallTranslation())
		modsToInstall.push_back(findTranslationModName());

	if (ui->checkBoxPresetExtras->isChecked() && checkCanInstallExtras())
		modsToInstall.push_back("vcmi-extras");

	if (ui->checkBoxPresetWog->isChecked() && checkCanInstallWog())
		modsToInstall.push_back("wake-of-gods");

	if (ui->checkBoxPresetHota->isChecked() && checkCanInstallHota())
		modsToInstall.push_back("hota");

	exitSetup();

	for (auto const & modName : modsToInstall)
		getModView()->doInstallMod(modName);
}

void FirstLaunchView::on_pushButtonDiscord_clicked()
{
	QDesktopServices::openUrl(QUrl("https://discord.gg/chBT42V"));
}

void FirstLaunchView::on_pushButtonSlack_clicked()
{
	QDesktopServices::openUrl(QUrl("https://slack.vcmi.eu/"));
}

void FirstLaunchView::on_pushButtonGithub_clicked()
{
	QDesktopServices::openUrl(QUrl("https://github.com/vcmi/vcmi"));
}