/****************************************************************************

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** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).

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** Contact: Nokia Corporation (qt-info@nokia.com)

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** This file is part of the Qt Mobility Components.

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** No Commercial Usage

** This file contains pre-release code and may not be distributed.

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** contained in the Technology Preview License Agreement accompanying

** this package.

**

** GNU Lesser General Public License Usage

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** General Public License version 2.1 as published by the Free Software

** Foundation and appearing in the file LICENSE.LGPL included in the

** packaging of this file.  Please review the following information to

** ensure the GNU Lesser General Public License version 2.1 requirements

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**

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** $QT_END_LICENSE$

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****************************************************************************/

#ifndef Q_CC_MINGW

#define _WIN32_DCOM

#include "qwmihelper_win_p.h"

#include <QDebug>

#include <ObjBase.h>

#include <Wbemidl.h>

#include <Oleauto.h>

#include <QStringList>

#include <QtCore/qmutex.h>

#include <QtCore/private/qmutexpool_p.h>

#include <QUuid>

QTM_BEGIN_NAMESPACE

WMIHelper::WMIHelper(QObject * parent)

        : QObject(parent)

{

   m_conditional = QString();

}

WMIHelper::~WMIHelper()

{

    CoUninitialize();

}

QVariant WMIHelper::getWMIData()

{

   if (!m_wmiNamespace.isEmpty() && !m_className.isEmpty() && !m_classProperties.isEmpty()) {

      return getWMIData(m_wmiNamespace, m_className, m_classProperties);

   }

   return QVariant();

}

void WMIHelper::initializeWMI(const QString &wmiNamespace)

{

    HRESULT hres;

    wbemLocator = 0;

    QUuid wbemLocatorClsid = "4590f811-1d3a-11d0-891f-00aa004b2e24";

    QUuid wbemLocatorIid = "dc12a687-737f-11cf-884d-00aa004b2e24";

    hres = CoCreateInstance(wbemLocatorClsid,0,CLSCTX_INPROC_SERVER,

                            wbemLocatorIid, (LPVOID *) &wbemLocator);

    if (hres == CO_E_NOTINITIALIZED) { // COM was not initialized

        CoInitializeEx(0, COINIT_MULTITHREADED);

        hres = CoCreateInstance(wbemLocatorClsid,0,CLSCTX_INPROC_SERVER,

                                wbemLocatorIid, (LPVOID *) &wbemLocator);

    }

    if (hres != S_OK) {

       qWarning() << "Failed to create IWbemLocator object." << hres;

        return ;

    }

    wbemServices = 0;

    hres = wbemLocator->ConnectServer(::SysAllocString(wmiNamespace.utf16()),0,0,0,0,0,0,&wbemServices);

    if (hres != WBEM_S_NO_ERROR){

        qWarning() << "Could not connect";

        return ;

    }

    hres = CoSetProxyBlanket( wbemServices, RPC_C_AUTHN_WINNT, RPC_C_AUTHZ_NONE, 0,

                              RPC_C_AUTHN_LEVEL_CALL, RPC_C_IMP_LEVEL_IMPERSONATE, 0, EOAC_NONE );

    if (hres != S_OK) {

       qWarning() << "Could not set proxy blanket" << hres;

        return ;

    }

}

QVariant WMIHelper::getWMIData(const QString &wmiNamespace, const QString &className, const QStringList &classProperty)

{

    initializeWMI(wmiNamespace);

    HRESULT hres;

    QVariant returnVariant;

      wbemEnumerator = 0;

    if (!m_conditional.isEmpty()) {

        if (m_conditional.left(1) != " ") {

            m_conditional.prepend(" ");

        }

    }

    QString aString = "SELECT * FROM " + className + m_conditional;

    BSTR bstrQuery;

    bstrQuery = ::SysAllocString(aString.utf16());

    hres = wbemServices->ExecQuery(L"WQL", bstrQuery,

            WBEM_FLAG_BIDIRECTIONAL | WBEM_FLAG_RETURN_IMMEDIATELY,0,&wbemEnumerator);

    if (hres != WBEM_S_NO_ERROR){

        qWarning() << "WMI Query failed.";

        wbemLocator->Release();

        wbemEnumerator->Release();

        return returnVariant;

    }

    ::SysFreeString(bstrQuery);

    wbemCLassObject = 0;

    ULONG result = 0;

    wmiVariantList.clear();

    while (wbemEnumerator) {

        HRESULT hr = wbemEnumerator->Next(WBEM_INFINITE, 1,&wbemCLassObject, &result);

        if(0 == result){

            break;

        }

        foreach(QString property, classProperty) {

            VARIANT msVariant;

            CIMTYPE variantType;

            hr = wbemCLassObject->Get(property.utf16(), 0, &msVariant, &variantType, 0);

            returnVariant = msVariantToQVariant(msVariant, variantType);

            wmiVariantList << returnVariant;

            VariantClear(&msVariant);

        }

        wbemCLassObject->Release();

    }

    wbemEnumerator->Release();

    wbemLocator->Release();

    wbemServices->Release();

    return returnVariant;

}

QVariant WMIHelper::msVariantToQVariant(VARIANT msVariant, CIMTYPE variantType)

{

    QVariant returnVariant;

    switch(variantType) {

    case CIM_STRING:

    case CIM_CHAR16:

        {

            QString str((QChar*)msVariant.bstrVal, wcslen(msVariant.bstrVal));

            QVariant vs(str);

            returnVariant = vs;

        }

        break;

    case CIM_BOOLEAN:

        {

            QVariant vb(msVariant.boolVal);

            returnVariant = vb;

        }

        break;

            case CIM_UINT8:

        {

            QVariant vb(msVariant.uintVal);

            returnVariant = vb;

        }

        break;

            case CIM_UINT16:

        {

            QVariant vb(msVariant.uintVal);

            returnVariant = vb;

        }

            case CIM_UINT32:

        {

            QVariant vb(msVariant.uintVal);

            returnVariant = vb;

        }

        break;

    };

    VariantClear(&msVariant);

    return returnVariant;

}

  void WMIHelper::setWmiNamespace(const QString &wmiNamespace)

{

   m_wmiNamespace = wmiNamespace;

}

   void WMIHelper::setClassName(const QString &className)

{

   m_className = className;

}

void WMIHelper::setClassProperty(const QStringList &classProperties)

{

   m_classProperties = classProperties;

}

void WMIHelper::setConditional(const QString &conditional)

{

   m_conditional = conditional;

}

QTM_END_NAMESPACE

#endif