/**************************************************************
 * 
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the 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 CompleteInstallPath( MSIHANDLE handle )
{
	// This CustomAction is necessary for updates from OOo 3.0, OOo 3.1 and OOo 3.2 to versions
	// OOo 3.3 or later. This is caused by a change of INSTALLLOCATION, that starting with OOo 3.3
	// contains the name of the product again (instead of only "c:\program files"). Unfortunately
	// this causes in an update installation, that INSTALLLOCATION is set to "c:\program files",
	// so that in an OOo 3.3 or later, the directory "program" or "share" are directly created
	// below "c:\program files".
	
	TCHAR	szValue[8192];
	DWORD	nValueSize = sizeof(szValue);
	HKEY	hKey;
	std::_tstring	sInstDir;
	std::_tstring	mystr;

	// Reading property OFFICEDIRHOSTNAME_, that contains the part of the path behind 
	// the program files folder.
	
	std::_tstring	sInstallLocation = GetMsiProperty( handle, TEXT("INSTALLLOCATION") );
	std::_tstring	sOfficeDirHostname = GetMsiProperty( handle, TEXT("OFFICEDIRHOSTNAME_") );
	
	// If sInstallLocation ends with (contains) the string sOfficeDirHostname,
	// INSTALLLOCATION is good and nothing has to be done here.
	
	bool pathCompletionRequired = true;

	if ( _tcsstr( sInstallLocation.c_str(), sOfficeDirHostname.c_str() ) )
	{
		pathCompletionRequired = false;  // nothing to do 
		// mystr = "Nothing to do, officedir is included into installlocation";
		// MessageBox( NULL, mystr.c_str(), "It is part of installlocation", MB_OK );
	}
	
	// If the path INSTALLLOCATION does not end with this string, INSTALLLOCATION is maybe
	// transferred from an OOo 3.0, OOo 3.1 and OOo 3.2 and need to be changed therefore.

	if ( pathCompletionRequired )
	{
		std::_tstring	sManufacturer = GetMsiProperty( handle, TEXT("Manufacturer") );
		std::_tstring	sDefinedName = GetMsiProperty( handle, TEXT("DEFINEDPRODUCT") );
		std::_tstring	sUpgradeCode = GetMsiProperty( handle, TEXT("UpgradeCode") );

		// sUpdateVersion can be "3.0", "3.1" or "3.2"

		std::_tstring	sProductKey30 = "Software\\" + sManufacturer + "\\" + sDefinedName +
											"\\" + "3.0" + "\\" + sUpgradeCode;

		std::_tstring	sProductKey31 = "Software\\" + sManufacturer + "\\" + sDefinedName +
											"\\" + "3.1" + "\\" + sUpgradeCode;

		std::_tstring	sProductKey32 = "Software\\" + sManufacturer + "\\" + sDefinedName +
											"\\" + "3.2" + "\\" + sUpgradeCode;

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

		// mystr = "Checking registry";
		// MessageBox( NULL, mystr.c_str(), "registry search", MB_OK );
	
		bool oldVersionExists = false;

		if ( ERROR_SUCCESS == RegOpenKey( HKEY_CURRENT_USER,  sProductKey30.c_str(), &hKey ) )
		{
			oldVersionExists = true;
			RegCloseKey( hKey );
		}
		else if ( ERROR_SUCCESS == RegOpenKey( HKEY_CURRENT_USER,  sProductKey31.c_str(), &hKey ) )
		{
			oldVersionExists = true;
			RegCloseKey( hKey );		
		}
		else if ( ERROR_SUCCESS == RegOpenKey( HKEY_CURRENT_USER,  sProductKey32.c_str(), &hKey ) )
		{
			oldVersionExists = true;
			RegCloseKey( hKey );		
		}
		else if ( ERROR_SUCCESS == RegOpenKey( HKEY_LOCAL_MACHINE,  sProductKey30.c_str(), &hKey ) )
		{
			oldVersionExists = true;
			RegCloseKey( hKey );		
		}
		else if ( ERROR_SUCCESS == RegOpenKey( HKEY_LOCAL_MACHINE,  sProductKey31.c_str(), &hKey ) )
		{
			oldVersionExists = true;
			RegCloseKey( hKey );		
		}
		else if ( ERROR_SUCCESS == RegOpenKey( HKEY_LOCAL_MACHINE,  sProductKey32.c_str(), &hKey ) )
		{
			oldVersionExists = true;
			RegCloseKey( hKey );		
		}
	
		if ( oldVersionExists )
		{
			// Adding the new path content sOfficeDirHostname
			sInstallLocation = sInstallLocation + sOfficeDirHostname;
			// Setting the new property value
			MsiSetProperty(handle, TEXT("INSTALLLOCATION"), sInstallLocation.c_str());
			// mystr = "Setting path to: " + sInstallLocation;
			// MessageBox( NULL, mystr.c_str(), "sInstallLocation", MB_OK );
		}
	}

	// mystr = "Ending with INSTALLLOCATION: " + sInstallLocation;
	// MessageBox( NULL, mystr.c_str(), "END", MB_OK );

	return ERROR_SUCCESS;
}