/**************************************************************
 * 
 * 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 UNICODE

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

#include <string.h>
#include <malloc.h>
#include <stdio.h>
#include "strsafe.h"

#include <seterror.hxx>

//----------------------------------------------------------
BOOL GetMsiProp( MSIHANDLE hMSI, const wchar_t* pPropName, wchar_t** ppValue )
{
    DWORD sz = 0;
   	if ( MsiGetProperty( hMSI, pPropName, L"", &sz ) == ERROR_MORE_DATA )
   	{
       	sz++;
       	DWORD nbytes = sz * sizeof( wchar_t );
       	wchar_t* buff = reinterpret_cast<wchar_t*>( malloc( nbytes ) );
       	ZeroMemory( buff, nbytes );
       	MsiGetProperty( hMSI, pPropName, buff, &sz );
   		*ppValue = buff;

		return TRUE;
	}

	return FALSE;
}

//----------------------------------------------------------
#ifdef DEBUG
inline void OutputDebugStringFormat( LPCTSTR pFormat, ... )
{
	TCHAR    buffer[1024];
	va_list  args;

	va_start( args, pFormat );
	StringCchVPrintf( buffer, sizeof(buffer), pFormat, args );
	OutputDebugString( buffer );
}
#else
static inline void OutputDebugStringFormat( LPCTSTR, ... )
{
}
#endif

//----------------------------------------------------------
extern "C" UINT __stdcall CheckVersions( MSIHANDLE hMSI )
{
	// MessageBox(NULL, L"CheckVersions", L"Information", MB_OK | MB_ICONINFORMATION);

    wchar_t* pVal = NULL;

	if ( GetMsiProp( hMSI, L"NEWPRODUCTS", &pVal ) && pVal )
	{
        OutputDebugStringFormat( TEXT("DEBUG: NEWPRODUCTS found [%s]"), pVal );
		if ( *pVal != 0 )
            SetMsiErrorCode( MSI_ERROR_NEW_VERSION_FOUND );
		free( pVal );
	}
    pVal = NULL;
	if ( GetMsiProp( hMSI, L"SAMEPRODUCTS", &pVal ) && pVal )
	{
        OutputDebugStringFormat( TEXT("DEBUG: SAMEPRODUCTS found [%s]"), pVal );
		if ( *pVal != 0 )
            SetMsiErrorCode( MSI_ERROR_SAME_VERSION_FOUND );
		free( pVal );
	}
    pVal = NULL;
	if ( GetMsiProp( hMSI, L"OLDPRODUCTS", &pVal ) && pVal )
	{
        OutputDebugStringFormat( TEXT("DEBUG: OLDPRODUCTS found [%s]"), pVal );
		if ( *pVal != 0 )
            SetMsiErrorCode( MSI_ERROR_OLD_VERSION_FOUND );
		free( pVal );
	}
    pVal = NULL;
	if ( GetMsiProp( hMSI, L"BETAPRODUCTS", &pVal ) && pVal )
	{
        OutputDebugStringFormat( TEXT("DEBUG: BETAPRODUCTS found [%s]"), pVal );
		if ( *pVal != 0 )
            SetMsiErrorCode( MSI_ERROR_OLD_VERSION_FOUND );
		free( pVal );
	}

    pVal = NULL;
	if ( GetMsiProp( hMSI, L"NEWPRODUCTSPATCH", &pVal ) && pVal )
	{
        OutputDebugStringFormat( TEXT("DEBUG: NEWPRODUCTSPATCH found [%s]"), pVal );
		if ( *pVal != 0 )
            SetMsiErrorCode( MSI_ERROR_NEW_PATCH_FOUND );
		free( pVal );
	}
    pVal = NULL;
	if ( GetMsiProp( hMSI, L"SAMEPRODUCTSPATCH", &pVal ) && pVal )
	{
        OutputDebugStringFormat( TEXT("DEBUG: SAMEPRODUCTSPATCH found [%s]"), pVal );
		if ( *pVal != 0 )
            SetMsiErrorCode( MSI_ERROR_SAME_PATCH_FOUND );
		free( pVal );
	}
    pVal = NULL;
	if ( GetMsiProp( hMSI, L"OLDPRODUCTSPATCH", &pVal ) && pVal )
	{
        OutputDebugStringFormat( TEXT("DEBUG: OLDPRODUCTSPATCH found [%s]"), pVal );
		if ( *pVal != 0 )
            SetMsiErrorCode( MSI_ERROR_OLD_PATCH_FOUND );
		free( pVal );
	}

	return ERROR_SUCCESS;
}