/*************************************************************************
 *
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 * 
 * Copyright 2000, 2010 Oracle and/or its affiliates.
 *
 * OpenOffice.org - a multi-platform office productivity suite
 *
 * This file is part of OpenOffice.org.
 *
 * OpenOffice.org is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License version 3
 * only, as published by the Free Software Foundation.
 *
 * OpenOffice.org 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 Lesser General Public License version 3 for more details
 * (a copy is included in the LICENSE file that accompanied this code).
 *
 * You should have received a copy of the GNU Lesser General Public License
 * version 3 along with OpenOffice.org.  If not, see
 * <http://www.openoffice.org/license.html>
 * for a copy of the LGPLv3 License.
 *
 ************************************************************************/

#define _WIN32_WINDOWS 0x0410
#ifdef _MSC_VER
#pragma warning(push, 1) /* disable warnings within system headers */
#endif
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#include <msiquery.h>
#ifdef _MSC_VER
#pragma warning(pop)
#endif

#include <malloc.h>

#ifdef UNICODE
#define _UNICODE
#define _tstring	wstring
#else
#define _tstring	string
#endif
#include <tchar.h>
#include <string>

using namespace std;

namespace 
{
	std::_tstring GetMsiProperty( MSIHANDLE handle, const std::_tstring& sProperty )
	{
		std::_tstring	result;
		TCHAR	szDummy[1] = TEXT("");
		DWORD	nChars = 0;

		if ( MsiGetProperty( handle, sProperty.c_str(), szDummy, &nChars ) == ERROR_MORE_DATA )
		{
			DWORD nBytes = ++nChars * sizeof(TCHAR);
			LPTSTR buffer = reinterpret_cast<LPTSTR>(_alloca(nBytes));
			ZeroMemory( buffer, nBytes );
			MsiGetProperty(handle, sProperty.c_str(), buffer, &nChars);
			result = buffer;
		}

		return	result;
	}
} // namespace

extern "C" UINT __stdcall MigrateInstallPath( MSIHANDLE handle )
{
	TCHAR	szValue[8192];
	DWORD	nValueSize = sizeof(szValue);
	HKEY	hKey;
	std::_tstring	sInstDir;

	std::_tstring	sManufacturer = GetMsiProperty( handle, TEXT("Manufacturer") );
	std::_tstring	sDefinedName = GetMsiProperty( handle, TEXT("DEFINEDPRODUCT") );
	std::_tstring	sUpdateVersion = GetMsiProperty( handle, TEXT("DEFINEDVERSION") );
	std::_tstring	sUpgradeCode = GetMsiProperty( handle, TEXT("UpgradeCode") );

	std::_tstring	sProductKey = "Software\\" + sManufacturer + "\\" + sDefinedName +
										"\\" + sUpdateVersion + "\\" + sUpgradeCode;

	std::_tstring	mystr;
	mystr = "ProductKey: " + sProductKey;
	// MessageBox( NULL, mystr.c_str(), "ProductKey", MB_OK );

	if ( ERROR_SUCCESS == RegOpenKey( HKEY_CURRENT_USER,  sProductKey.c_str(), &hKey ) )
	{
		if ( ERROR_SUCCESS == RegQueryValueEx( hKey, TEXT("INSTALLLOCATION"), NULL, NULL, (LPBYTE)szValue, &nValueSize ) )
		{
			sInstDir = szValue;
			MsiSetProperty(handle, TEXT("INSTALLLOCATION"), sInstDir.c_str());                        
			// MessageBox( NULL, sInstDir.c_str(), "Found in HKEY_CURRENT_USER", MB_OK );
		}
		
		RegCloseKey( hKey );
	}
	else if ( ERROR_SUCCESS == RegOpenKey( HKEY_LOCAL_MACHINE,  sProductKey.c_str(), &hKey ) )
	{
		if ( ERROR_SUCCESS == RegQueryValueEx( hKey, TEXT("INSTALLLOCATION"), NULL, NULL, (LPBYTE)szValue, &nValueSize ) )
		{
			sInstDir = szValue;
			MsiSetProperty(handle, TEXT("INSTALLLOCATION"), sInstDir.c_str());                        
			// MessageBox( NULL, sInstDir.c_str(), "Found in HKEY_LOCAL_MACHINE", MB_OK );
		}

		RegCloseKey( hKey );
	}

	return ERROR_SUCCESS;

}