/*
 Derived from source code of TrueCrypt 7.1a, which is
 Copyright (c) 2008-2012 TrueCrypt Developers Association and which is governed
 by the TrueCrypt License 3.0.

 Modifications and additions to the original source code (contained in this file)
 and all other portions of this file are Copyright (c) 2013-2017 IDRIX
 and are governed by the Apache License 2.0 the full text of which is
 contained in the file License.txt included in VeraCrypt binary and source
 code distribution packages.
*/

#include "System.h"
#include "Platform/Platform.h"
#include "Resources.h"

#ifdef TC_WINDOWS
#include "Main/resource.h"
#else
#ifdef TC_MACOSX
#include "Application.h"
#endif
#include "Platform/File.h"
#include "Platform/StringConverter.h"
#include <stdio.h>
#include "UserPreferences.h"
#endif

namespace VeraCrypt
{

#ifdef TC_WINDOWS
	static ConstBufferPtr GetWindowsResource (const wchar_t *resourceType, const wchar_t *resourceName)
	{
		HGLOBAL hResL;
		HRSRC hRes;

		hRes = FindResource (NULL, resourceName, resourceType);
		throw_sys_if (!hRes);
		hResL = LoadResource (NULL, hRes);
		throw_sys_if (!hResL);

		const byte *resPtr = (const byte *) LockResource (hResL);
		throw_sys_if (!resPtr);

		return ConstBufferPtr (resPtr, SizeofResource (NULL, hRes));
	}
#endif // TC_WINDOWS

	string Resources::GetLanguageXml ()
	{
#ifdef TC_WINDOWS
		ConstBufferPtr res = GetWindowsResource (L"XML", L"IDR_LANGUAGE");
		Buffer strBuf (res.Size() + 1);
		strBuf.Zero();
		strBuf.CopyFrom (res);
		return string (reinterpret_cast <char *> (strBuf.Ptr()));
#else
		// get language from env LANG
		// support:  C,POSIX,
		// support for e.g. german: de_DE.UTF-8, de.UTF8, de_DE, de
		// not support e.g.: de@Euro
		string defaultLang("en");
#if defined (TC_MACOSX)
		string filenamePrefix = StringConverter::ToSingle (Application::GetExecutableDirectory()) + "/../Resources/languages/Language.";
#else
		string filenamePrefix("/usr/share/veracrypt/languages/Language.");
#endif
		string filenamePost(".xml");
		string filename = filenamePrefix + defaultLang + filenamePost;

		UserPreferences Preferences;
		Preferences.Load();
		wstring preferredLang = Preferences.Language;
#ifdef DEBUG
		std::cout << "Config language: " << preferredLang << std::endl;
#endif

		if (preferredLang == L"system") {
			if (const char *env_p = getenv("LANG")) {
				string lang(env_p);
#ifdef DEBUG
				std::cout << "env $LANG: " << lang << std::endl;
#endif
				if (lang.size() > 1) {
					int found = lang.find(".");
					if (found > 1) {
						string langTag = lang.substr(0, found);
						string lowerLangTag(StringConverter::ToLower(langTag));
						int foundUnderscore = lowerLangTag.find("_");
						if (foundUnderscore > 0) {
							lowerLangTag.replace(foundUnderscore, 1, 1, '-');
							filename = filenamePrefix + lowerLangTag + filenamePost;
							FilesystemPath xml(filename);
							if (!xml.IsFile()) {
								string shortLangTag = lowerLangTag.substr(0, foundUnderscore);
								filename = filenamePrefix + shortLangTag + filenamePost;
								FilesystemPath xml(filename);
								if (!xml.IsFile()) {
									filename = filenamePrefix + defaultLang + filenamePost;
								}
							}
						} else {
							filename = filenamePrefix + langTag + filenamePost;
							FilesystemPath xml(filename);
							if (!xml.IsFile()) {
								filename = filenamePrefix + defaultLang + filenamePost;
							}
						}
					} else {
						string lowerLang(StringConverter::ToLower(lang));
						filename = filenamePrefix + lowerLang + filenamePost;
						FilesystemPath xml(filename);
						if (!xml.IsFile()) {
							int foundUnderscore = lowerLang.find("_");
							if (foundUnderscore > 0) {
								lowerLang.replace(foundUnderscore, 1, 1, '-');
								filename = filenamePrefix + lowerLang + filenamePost;
								FilesystemPath xml(filename);
								if (!xml.IsFile()) {
									filename = filenamePrefix + defaultLang + filenamePost;
								}
							}
						}
					}
				}
			}
		} else {
			filename = filenamePrefix + preferredLang + filenamePost;
		}
		FilesystemPath xml(filename);
		if ( xml.IsFile() ){
			File file;
			file.Open (xml, File::OpenRead, File::ShareRead);
			vector <byte> keyfileData (file.Length());
			BufferPtr keyfileDataBuf (&keyfileData.front(), keyfileData.size());
			file.ReadCompleteBuffer (keyfileDataBuf);
			file.Close();
			string langxml(keyfileData.begin(), keyfileData.end());
			return langxml;
		}
		static byte LanguageXml[] =
		{
#			include "Common/Language.xml.h"
			, 0
		};

		return string ((const char*) LanguageXml);
#endif
	}

	string Resources::GetLegalNotices ()
	{
#ifdef TC_WINDOWS
		ConstBufferPtr res = GetWindowsResource (L"TEXT", L"IDR_LICENSE");
		Buffer strBuf (res.Size() + 1);
		strBuf.Zero();
		strBuf.CopyFrom (res);
		return string (reinterpret_cast <char *> (strBuf.Ptr()));
#else
		static byte License[] =
		{
#			include "License.txt.h"
			, 0
		};

		return string ((const char*) License);
#endif
	}


#ifndef TC_NO_GUI

	wxBitmap Resources::GetDriveIconBitmap ()
	{
#ifdef TC_WINDOWS
		return wxBitmap (L"IDB_DRIVE_ICON", wxBITMAP_TYPE_BMP_RESOURCE).ConvertToImage().Resize (wxSize (16, 12), wxPoint (0, 0));
#else
		static const byte DriveIcon[] =
		{
#			include "Mount/Drive_icon_96dpi.bmp.h"
		};

		wxMemoryInputStream stream (DriveIcon, sizeof (DriveIcon));
		return wxBitmap (wxImage (stream).Resize (wxSize (16, 12), wxPoint (0, 0)));
#endif
	}

	wxBitmap Resources::GetDriveIconMaskBitmap ()
	{
#ifdef TC_WINDOWS
		wxImage image = wxBitmap (L"IDB_DRIVE_ICON_MASK", wxBITMAP_TYPE_BMP_RESOURCE).ConvertToImage().Resize (wxSize (16, 12), wxPoint (0, 0));
		return wxBitmap (image.ConvertToMono (0, 0, 0), 1);
#else
		static const byte DriveIconMask[] =
		{
#			include "Mount/Drive_icon_mask_96dpi.bmp.h"
		};

		wxMemoryInputStream stream (DriveIconMask, sizeof (DriveIconMask));
		wxImage image (stream);
		image.Resize (wxSize (16, 12), wxPoint (0, 0));

#	if defined  __WXGTK__ || defined TC_MACOSX
		return wxBitmap (image.ConvertToMono (0, 0, 0), 1);
#	else
		return wxBitmap (image);
#	endif
#endif
	}


	wxBitmap Resources::GetLogoBitmap ()
	{
#ifdef TC_WINDOWS
		return wxBitmap (L"IDB_LOGO", wxBITMAP_TYPE_BMP_RESOURCE);
#else
		static const byte Logo[] =
		{
#			include "Mount/Logo_96dpi.bmp.h"
		};

		wxMemoryInputStream stream (Logo, sizeof (Logo));
		return wxBitmap (wxImage (stream));
#endif
	}

	wxBitmap Resources::GetTextualLogoBitmap ()
	{
#ifdef TC_WINDOWS
		return wxBitmap (L"IDB_TEXTUAL_LOGO", wxBITMAP_TYPE_BMP_RESOURCE);
#else
		static const byte Logo[] =
		{
#			include "Common/Textual_logo_96dpi.bmp.h"
		};

		wxMemoryInputStream stream (Logo, sizeof (Logo));
		return wxBitmap (wxImage (stream));
#endif
	}

	wxIcon Resources::GetVeraCryptIcon ()
	{
#ifdef TC_WINDOWS
		return wxIcon (L"IDI_TRUECRYPT_ICON", wxBITMAP_TYPE_ICO_RESOURCE, 16, 16);
#else
#		include "Resources/Icons/VeraCrypt-256x256.xpm"
		return wxIcon (VeraCryptIcon256x256);
#endif
	}

	wxBitmap Resources::GetVolumeCreationWizardBitmap (int height)
	{
#ifdef TC_WINDOWS
		return wxBitmap (L"IDB_VOLUME_WIZARD_BITMAP", wxBITMAP_TYPE_BMP_RESOURCE);
#else
		static const byte VolumeWizardIcon[] =
		{
#			include "Format/VeraCrypt_Wizard.bmp.h"
		};

		wxMemoryInputStream stream (VolumeWizardIcon, sizeof (VolumeWizardIcon));

		wxImage image (stream);
		if (height != -1)
		{
			double scaleFactor = double (height) / double (image.GetHeight());
			image.Rescale (int (image.GetWidth() * scaleFactor), int (image.GetHeight() * scaleFactor), wxIMAGE_QUALITY_HIGH);
		}

		return wxBitmap (image);
#endif
	}

#endif // !TC_NO_GUI

}