// Ryzom - MMORPG Framework <http://dev.ryzom.com/projects/ryzom/>
// Copyright (C) 2010  Winch Gate Property Limited
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as
// published by the Free Software Foundation, either version 3 of the
// License, or (at your option) any later version.
//
// 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 Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

#include "stdpch.h"
#include "configfile.h"
#include "utils.h"

#include "nel/misc/path.h"

#ifdef DEBUG_NEW
	#define new DEBUG_NEW
#endif

const CServer NoServer;
const CProfile NoProfile;

CConfigFile *CConfigFile::s_instance = NULL;

CConfigFile::CConfigFile(QObject *parent):QObject(parent), m_defaultServerIndex(0), m_defaultProfileIndex(0), m_use64BitsClient(false)
{
	s_instance = this;

	m_language = QLocale::system().name().left(2); // only keep language ISO 639 code
	m_defaultConfigPath = QApplication::applicationDirPath() + "/installer.ini";
	m_configPath = QStandardPaths::writableLocation(QStandardPaths::AppConfigLocation) + "/installer.ini";
}

CConfigFile::~CConfigFile()
{
	s_instance = NULL;
}

bool CConfigFile::load()
{
	return load(m_configPath) || load(m_defaultConfigPath);
}

bool CConfigFile::load(const QString &filename)
{
	QSettings settings(filename, QSettings::IniFormat);

	settings.beginGroup("common");
	m_language = settings.value("language", m_language).toString();
	m_srcDirectory = settings.value("source_directory").toString();
	m_installationDirectory = settings.value("installation_directory").toString();
	m_use64BitsClient = settings.value("use_64bits_client").toBool();
	settings.endGroup();

	settings.beginGroup("servers");
	int serversCount = settings.value("size").toInt();
	m_defaultServerIndex = settings.value("default").toInt();
	settings.endGroup();
	
	m_servers.resize(serversCount);

	for(int i = 0; i < serversCount; ++i)
	{
		CServer &server = m_servers[i];

		settings.beginGroup(QString("server_%1").arg(i));

		server.id = settings.value("id").toString();
		server.name = settings.value("name").toString();
		server.displayUrl = settings.value("display_url").toString();
		server.dataDownloadUrl = settings.value("data_download_url").toString();
		server.dataDownloadFilename = settings.value("data_download_filename").toString();
		server.dataCompressedSize = settings.value("data_compressed_size").toULongLong();
		server.dataUncompressedSize = settings.value("data_uncompressed_size").toULongLong();
		server.clientDownloadUrl = settings.value("client_download_url").toString();
		server.clientDownloadFilename = settings.value("client_download_filename").toString();
#if defined(Q_OS_WIN)
		server.clientFilename = settings.value("client_filename_windows").toString();
		server.clientFilenameOld = settings.value("client_filename_old_windows").toString();
		server.configurationFilename = settings.value("configuration_filename_windows").toString();
		server.installerFilename = settings.value("installer_filename_windows").toString();
#elif defined(Q_OS_MAC)
		server.clientFilename = settings.value("client_filename_osx").toString();
		server.clientFilenameOld = settings.value("client_filename_old_osx").toString();
		server.configurationFilename = settings.value("configuration_filename_osx").toString();
		server.installerFilename = settings.value("installer_filename_osx").toString();
#else
		server.clientFilename = settings.value("client_filename_linux").toString();
		server.clientFilenameOld = settings.value("client_filename_old_linux").toString();
		server.configurationFilename = settings.value("configuration_filename_linux").toString();
		server.installerFilename = settings.value("installer_filename_linux").toString();
#endif
		server.comments = settings.value("comments").toString();

		settings.endGroup();
	}

	settings.beginGroup("profiles");
	int profilesCounts = settings.value("size").toInt();
	m_defaultProfileIndex = settings.value("default").toInt();
	settings.endGroup();
	
	m_profiles.resize(profilesCounts);

	for(int i = 0; i < profilesCounts; ++i)
	{
		CProfile &profile = m_profiles[i];

		settings.beginGroup(QString("profile_%1").arg(i));

		profile.id = settings.value("id").toString();
		profile.name = settings.value("name").toString();
		profile.account = settings.value("account").toString();
		profile.server = settings.value("server").toString();
		profile.executable = settings.value("executable").toString();
		profile.arguments = settings.value("arguments").toString();
		profile.comments = settings.value("comments").toString();
		profile.desktopShortcut = settings.value("desktop_shortcut").toBool();
		profile.menuShortcut = settings.value("menu_shortcut").toBool();

		settings.endGroup();
	}

	return !m_servers.isEmpty();
}

bool CConfigFile::save() const
{
	QSettings settings(m_configPath, QSettings::IniFormat);

	settings.beginGroup("common");
	settings.setValue("language", m_language);
	settings.setValue("source_directory", m_srcDirectory);
	settings.setValue("installation_directory", m_installationDirectory);
	settings.setValue("use_64bits_client", m_use64BitsClient);
	settings.endGroup();

	settings.beginGroup("servers");
	settings.setValue("size", m_servers.size());
	settings.setValue("default", m_defaultServerIndex);
	settings.endGroup();

	for(int i = 0; i < m_servers.size(); ++i)
	{
		const CServer &server = m_servers[i];

		settings.beginGroup(QString("server_%1").arg(i));

		settings.setValue("id", server.id);
		settings.setValue("name", server.name);
		settings.setValue("display_url", server.displayUrl);
		settings.setValue("data_download_url", server.dataDownloadUrl);
		settings.setValue("data_download_filename", server.dataDownloadFilename);
		settings.setValue("data_compressed_size", server.dataCompressedSize);
		settings.setValue("data_uncompressed_size", server.dataUncompressedSize);
		settings.setValue("client_download_url", server.clientDownloadUrl);
		settings.setValue("client_download_filename", server.clientDownloadFilename);
#if defined(Q_OS_WIN)
		settings.setValue("client_filename_windows", server.clientFilename);
		settings.setValue("client_filename_old_windows", server.clientFilenameOld);
		settings.setValue("configuration_filename_windows", server.configurationFilename);
		settings.setValue("installer_filename_windows", server.installerFilename);
#elif defined(Q_OS_MAC)
		settings.setValue("client_filename_osx", server.clientFilename);
		settings.setValue("client_filename_old_osx", server.clientFilenameOld);
		settings.setValue("configuration_filename_osx", server.configurationFilename);
		settings.setValue("installer_filename_osx", server.installerFilename);
#else
		settings.setValue("client_filename_linux", server.clientFilename);
		settings.setValue("client_filename_old_linux", server.clientFilenameOld);
		settings.setValue("configuration_filename_linux", server.configurationFilename);
		settings.setValue("installer_filename_linux", server.installerFilename);
#endif
		settings.setValue("comments", server.comments);

		settings.endGroup();
	}

	settings.beginGroup("profiles");
	settings.setValue("size", m_profiles.size());
	settings.setValue("default", m_defaultProfileIndex);
	settings.endGroup();

	for(int i = 0; i < m_profiles.size(); ++i)
	{
		const CProfile &profile = m_profiles[i];

		settings.beginGroup(QString("profile_%1").arg(i));

		settings.setValue("id", profile.id);
		settings.setValue("name", profile.name);
		settings.setValue("account", profile.account);
		settings.setValue("server", profile.server);
		settings.setValue("executable", profile.executable);
		settings.setValue("arguments", profile.arguments);
		settings.setValue("comments", profile.comments);
		settings.setValue("desktop_shortcut", profile.desktopShortcut);
		settings.setValue("menu_shortcut", profile.menuShortcut);

		settings.endGroup();
	}

	return true;
}

CConfigFile* CConfigFile::getInstance()
{
	return s_instance;
}

int CConfigFile::getServersCount() const
{
	return m_servers.size();
}

const CServer& CConfigFile::getServer(int i) const
{
	if (i < 0) i = m_defaultServerIndex;

	if (i >= m_servers.size()) return NoServer;

	return m_servers.at(i);
}

const CServer& CConfigFile::getServer(const QString &id) const
{
	for(int i = 0; i < m_servers.size(); ++i)
	{
		if (m_servers[i].id == id) return m_servers[i];
	}

	// default server
	return getServer();
}

int CConfigFile::getProfilesCount() const
{
	return m_profiles.size();
}

CProfile CConfigFile::getProfile(int i) const
{
	if (i < 0) i = m_defaultProfileIndex;

	if (i >= m_profiles.size()) return NoProfile;

	return m_profiles.at(i);
}

void CConfigFile::setProfile(int i, const CProfile &profile)
{
	m_profiles[i] = profile;
}

int CConfigFile::addProfile(const CProfile &profile)
{
	m_profiles.append(profile);

	return m_profiles.size()-1;
}

void CConfigFile::removeProfile(int i)
{
	m_profiles.removeAt(i);

	// TODO: decalle all profiles and move files
}

bool CConfigFile::has64bitsOS()
{
	return QSysInfo::currentCpuArchitecture() == "x86_64";
}

int CConfigFile::getDefaultServerIndex() const
{
	return m_defaultServerIndex;
}

void CConfigFile::setDefaultServerIndex(int index)
{
	m_defaultServerIndex = index;
}

int CConfigFile::getDefaultProfileIndex() const
{
	return m_defaultProfileIndex;
}

void CConfigFile::setDefaultProfileIndex(int index)
{
	m_defaultProfileIndex = index;
}

bool CConfigFile::isRyzomInstallerConfigured() const
{
	return m_profiles.size() > 0;
}

QString CConfigFile::getInstallationDirectory() const
{
	return m_installationDirectory;
}

void CConfigFile::setInstallationDirectory(const QString &directory)
{
	m_installationDirectory = directory;
}

QString CConfigFile::getSrcServerDirectory() const
{
	return m_srcDirectory;
}

void CConfigFile::setSrcServerDirectory(const QString &directory)
{
	m_srcDirectory = directory;
}

QString CConfigFile::getProfileDirectory() const
{
	return QStandardPaths::writableLocation(QStandardPaths::AppDataLocation);
}

QString CConfigFile::getSrcProfileDirectory() const
{
	if (QFile::exists(getSrcServerDirectory() + "/client.cfg")) return getSrcServerDirectory();

	return qFromUtf8(NLMISC::CPath::getApplicationDirectory("Ryzom"));
}

bool CConfigFile::use64BitsClient() const
{
	return m_use64BitsClient;
}

void CConfigFile::setUse64BitsClient(bool on)
{
	m_use64BitsClient = on;
}

QString CConfigFile::expandVariables(const QString &str)
{
	QString res = str;

	res.replace("$TIMESTAMP", QString::number(QDateTime::currentDateTime().toTime_t()));
	res.replace("$LANG", m_language);
	res.replace("$ARCH", getClientArch());

	return res;
}

QString CConfigFile::getClientArch() const
{
#if defined(Q_OS_WIN)
	return QString("win%1").arg(m_use64BitsClient ? 64:32);
#elif defined(Q_OS_MAC)
	// only 64 bits clients under OS X, because there not any 32 bits OS X version anymore
	return "osx";
#else
	return QString("linux%1").arg(m_use64BitsClient ? 64:32);
#endif
}

QString CConfigFile::getCurrentDirectory()
{
	return QDir::current().absolutePath();
}

QString CConfigFile::getParentDirectory()
{
	QDir current = QDir::current();
	current.cdUp();
	return current.absolutePath();
}

QString CConfigFile::getApplicationDirectory()
{
	return QApplication::applicationDirPath();
}

QString CConfigFile::getOldInstallationDirectory()
{
	// HKEY_CURRENT_USER/SOFTWARE/Nevrax/RyzomInstall/InstallId=1917716796 (string)
#if defined(Q_OS_WIN)
	// NSIS previous official installer
#ifdef Q_OS_WIN64
	// use WOW6432Node in 64 bits (64 bits OS and 64 bits Installer) because Ryzom old installer was in 32 bits
	QSettings settings("HKEY_LOCAL_MACHINE\\Software\\WOW6432Node\\Nevrax\\Ryzom", QSettings::NativeFormat);
#else
	QSettings settings("HKEY_LOCAL_MACHINE\\Software\\Nevrax\\Ryzom", QSettings::NativeFormat);
#endif

	if (settings.contains("Ryzom Install Path"))
	{
		return QDir::fromNativeSeparators(settings.value("Ryzom Install Path").toString());
	}

	// check default directory if registry key not found
	return CConfigFile::has64bitsOS() ? "C:/Program Files (x86)/Ryzom":"C:/Program Files/Ryzom";
#elif defined(Q_OS_MAC)
	return "/Applications/Ryzom.app";
#else
	return QStandardPaths::writableLocation(QStandardPaths::HomeLocation) + "/.ryzom";
#endif
}

QString CConfigFile::getOldInstallationLanguage()
{
	// HKEY_CURRENT_USER/SOFTWARE/Nevrax/RyzomInstall/InstallId=1917716796 (string)
#if defined(Q_OS_WIN)
	// NSIS previous official installer
#ifdef Q_OS_WIN64
	// use WOW6432Node in 64 bits (64 bits OS and 64 bits Installer) because Ryzom old installer was in 32 bits
	QSettings settings("HKEY_LOCAL_MACHINE\\Software\\WOW6432Node\\Nevrax\\Ryzom", QSettings::NativeFormat);
#else
	QSettings settings("HKEY_LOCAL_MACHINE\\Software\\Nevrax\\Ryzom", QSettings::NativeFormat);
#endif

	if (settings.contains("Language"))
	{
		QString languageCode = settings.value("Language").toString();
		// 1036 = French
		return "";
	}

	return "en";
#elif defined(Q_OS_MAC)
	return "/Applications/Ryzom.app";
#else
	return QStandardPaths::writableLocation(QStandardPaths::HomeLocation) + "/.ryzom";
#endif
}

QString CConfigFile::getNewInstallationLanguage()
{
	// HKEY_CURRENT_USER/SOFTWARE/Nevrax/RyzomInstall/InstallId=1917716796 (string)
#if defined(Q_OS_WIN)
	// NSIS previous official installer
#ifdef Q_OS_WIN64
	// use WOW6432Node in 64 bits (64 bits OS and 64 bits Installer) because Ryzom old installer was in 32 bits
	QSettings settings("HKEY_LOCAL_MACHINE\\Software\\WOW6432Node\\Nevrax\\Ryzom", QSettings::NativeFormat);
#else
	QSettings settings("HKEY_LOCAL_MACHINE\\Software\\Nevrax\\Ryzom", QSettings::NativeFormat);
#endif

	if (settings.contains("Ryzom Install Path"))
	{
		return QDir::fromNativeSeparators(settings.value("Ryzom Install Path").toString());
	}

	// check default directory if registry key not found
	return CConfigFile::has64bitsOS() ? "C:/Program Files (x86)/Ryzom" : "C:/Program Files/Ryzom";
#elif defined(Q_OS_MAC)
	return "/Applications/Ryzom.app";
#else
	return QStandardPaths::writableLocation(QStandardPaths::HomeLocation) + "/.ryzom";
#endif
}

QString CConfigFile::getNewInstallationDirectory()
{
	return QStandardPaths::writableLocation(QStandardPaths::AppLocalDataLocation);
}

bool CConfigFile::isRyzomInstalledIn(const QString &directory) const
{
	// check client and data
	return isRyzomClientInstalledIn(directory) && areRyzomDataInstalledIn(directory);
}

bool CConfigFile::areRyzomDataInstalledIn(const QString &directory) const
{
	QDir dir(directory);

	// directory doesn't exist
	if (!dir.exists()) return false;

	if (!dir.cd("data") || !dir.exists()) return false;

	// at least 200 BNP in data directory
	if (dir.entryList(QStringList() << "*.bnp", QDir::Files).size() < 200) return false;

	//  ryzom.ttf or fonts.bnp is required
	if (!dir.exists("fonts/ryzom.ttf") && !dir.exists("fonts.bnp")) return false;

	//  gamedev.bnp is required
	if (!dir.exists("gamedev.bnp")) return false;

	//  interfaces.bnp is required
	if (!dir.exists("interfaces.bnp")) return false;

	// TODO: more checks

	return true;
}

bool CConfigFile::isRyzomClientInstalledIn(const QString &directory) const
{
	QDir dir(directory);

	// directory doesn't exist
	if (!dir.exists()) return false;

	// client_default.cfg doesn't exist
	if (!dir.exists("client_default.cfg")) return false;

	// current server
	CServer server = getServer();

	QString clientFilename = server.clientFilename;

	// check if new client is defined and exists
	if (!clientFilename.isEmpty() && !dir.exists(clientFilename))
	{
		clientFilename = server.clientFilenameOld;

		// check if old client is defined and exists
		if (!dir.exists(clientFilename)) return false;
	}

	// TODO: more checks

	return true;
}

bool CConfigFile::foundTemporaryFiles(const QString &directory) const
{
	QDir dir(directory);

	// directory doesn't exist
	if (!dir.exists()) return false;

	if (!dir.cd("data") && dir.exists()) return false;

	// temporary files
	if (!dir.entryList(QStringList() << "*.string_cache" << "*.packed_sheets" << "*.packed" << "*.pem", QDir::Files).isEmpty()) return true;

	// fonts directory is not needed anymore
	if (dir.cd("fonts") && dir.exists()) return true;

	return false;
}

bool CConfigFile::shouldCreateDesktopShortcut() const
{
	const CProfile &profile = getProfile();

	return profile.desktopShortcut && !QFile::exists(QStandardPaths::writableLocation(QStandardPaths::DesktopLocation) + "/Ryzom.lnk");
}

QString CConfigFile::getClientFullPath() const
{
	QString path = getProfile().executable;

	if (!path.isEmpty()) return path;

	return getInstallationDirectory() + "/" + getServer().id + "/" + getServer().clientFilename;
}

QString CConfigFile::getSrcServerClientBNPFullPath() const
{
	return QString("%1/unpack/exedll_%2.bnp").arg(getSrcServerDirectory()).arg(getClientArch());
}

CConfigFile::InstallationStep CConfigFile::getNextStep() const
{
	// get last used profile
	const CProfile &profile = getProfile();

	// get server used by it or default server
	CServer server = getServer(profile.server);

	// no or wrong profile
	if (server.id.isEmpty())
	{
		// get last used server
		server = getServer();
	}

	// no or wrong server
	if (server.id.isEmpty())
	{
		// get first server
		server = getServer(0);
	}

	// no server defined, shouldn't happen
	if (server.id.isEmpty())
	{
		return DisplayNoServerError;
	}

	// only show wizard if installation directory undefined
	if (getInstallationDirectory().isEmpty())
	{
		// if launched from current directory, it means we just patched files
		QString currentDirectory = getCurrentDirectory();

		if (!isRyzomInstalledIn(currentDirectory))
		{
			// Ryzom is in the same directory as Ryzom Installer
			currentDirectory = getApplicationDirectory();

			if (!isRyzomInstalledIn(currentDirectory))
			{
				currentDirectory.clear();
			}
		}

		// install or migrate depending if Ryzom was found in current directory
		return currentDirectory.isEmpty() ? ShowInstallWizard:ShowMigrateWizard;
	}

	QString serverDirectory = getInstallationDirectory() + "/" + server.id;

	if (getSrcServerDirectory().isEmpty())
	{
		// user decided to download files

		// downloaded files are kept in server directory
		QString dataFile = getInstallationDirectory() + "/" + server.dataDownloadFilename;
		QString clientFile = getInstallationDirectory() + "/" + server.clientDownloadFilename;

		// data are not copied
		if (!areRyzomDataInstalledIn(serverDirectory))
		{
			// when file is not finished, it has .part extension
			if (!QFile::exists(dataFile))
			{
				return DownloadData;
			}

			return ExtractDownloadedData;
		}

		if (!isRyzomClientInstalledIn(serverDirectory))
		{
			// when file is not finished, it has .part extension
			if (!QFile::exists(clientFile))
			{
				return DownloadClient;
			}

			return ExtractDownloadedClient;
		}
	}
	else
	{
		// user decided to copy files

		// data are not copied
		if (!areRyzomDataInstalledIn(serverDirectory))
		{
			// selected directory contains Ryzom files (shouldn't fail)
			if (areRyzomDataInstalledIn(getSrcServerDirectory()))
			{
				return CopyServerFiles;
			}
			else
			{
				return ShowInstallWizard;
			}
		}

		// client is not extracted from BNP
		if (!isRyzomClientInstalledIn(serverDirectory))
		{
			if (foundTemporaryFiles(serverDirectory))
			{
				return CleanFiles;
			}

			if (QFile::exists(getSrcServerClientBNPFullPath()))
			{
				return ExtractBnpClient;
			}
			else
			{
				QString clientFile = getInstallationDirectory() + "/" + server.clientDownloadFilename;

				// when file is not finished, it has .part extension
				if (!QFile::exists(clientFile))
				{
					return DownloadClient;
				}

				return ExtractDownloadedClient;
			}
		}
	}

	// if installer not found in installation directory, extract it from BNP
	if (!QFile::exists(getInstallationDirectory() + "/" + server.installerFilename))
	{
		return CopyInstaller;
	}

	// no default profile
	if (profile.id.isEmpty())
	{
		return CreateProfile;
	}

	QString clientCfg = QString("%1/%2/client.cfg").arg(getProfileDirectory()).arg(profile.id);

	// migration profile
	if (!getSrcServerDirectory().isEmpty() && QFile::exists(getSrcProfileDirectory() + "/client.cfg") && !QFile::exists(clientCfg))
	{
		return CopyProfileFiles;
	}

	if (shouldCreateDesktopShortcut())
	{
		// TODO: check they point to getClientFullPath()
		return CreateShortcuts;
	}

	return Done;
}