/****************************************************************************
**
** Copyright (C) 2016 basysKom GmbH, opensource@basyskom.com
** Contact: http://www.qt.io/licensing/
**
** This file is part of the QtOpcUa module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL3$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see http://www.qt.io/terms-conditions. For further
** information use the contact form at http://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPLv3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or later as published by the Free
** Software Foundation and appearing in the file LICENSE.GPL included in
** the packaging of this file. Please review the following information to
** ensure the GNU General Public License version 2.0 requirements will be
** met: http://www.gnu.org/licenses/gpl-2.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/

#ifndef QOPCUANODE_P_H
#define QOPCUANODE_P_H

//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists purely as an
// implementation detail.  This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//

#include <QtOpcUa/qopcuaclient.h>
#include <QtOpcUa/qopcuanode.h>
#include <private/qopcuanodeimpl_p.h>

#include <private/qobject_p.h>
#include <QtCore/qpointer.h>
#include <QtCore/qscopedpointer.h>
#include <QtCore/qhash.h>

QT_BEGIN_NAMESPACE

class QOpcUaNodePrivate : public QObjectPrivate
{
    Q_DECLARE_PUBLIC(QOpcUaNode)

public:
    QOpcUaNodePrivate(QOpcUaNodeImpl *impl, QOpcUaClient *client)
        : m_impl(impl)
        , m_client(client)
    {
        m_attributesReadConnection = QObject::connect(impl, &QOpcUaNodeImpl::attributesRead,
                [this](QVector<QOpcUaReadResult> attr, QOpcUa::UaStatusCode serviceResult)
        {
            for (auto &entry : qAsConst(attr)) {
                if (serviceResult == QOpcUa::UaStatusCode::Good)
                    m_nodeAttributes[entry.attributeId] = { entry.value, entry.statusCode };
                else
                    m_nodeAttributes[entry.attributeId] = { QVariant(), serviceResult };
            }

            QOpcUaNode::NodeAttributes updatedAttributes;
            for (auto &entry : qAsConst(attr))
                updatedAttributes |= entry.attributeId;

            emit q_func()->readFinished(updatedAttributes);
        });

        m_attributeWrittenConnection = QObject::connect(impl, &QOpcUaNodeImpl::attributeWritten,
                [this](QOpcUaNode::NodeAttribute attr, QVariant value, QOpcUa::UaStatusCode statusCode)
        {
            m_nodeAttributes[attr].statusCode = statusCode;
            if (statusCode == QOpcUa::UaStatusCode::Good)
                m_nodeAttributes[attr].attribute = value;

            emit q_func()->attributeWritten(attr, statusCode);
        });
    }

    ~QOpcUaNodePrivate()
    {
        QObject::disconnect(m_attributesReadConnection);
        QObject::disconnect(m_attributeWrittenConnection);
    }

    QScopedPointer<QOpcUaNodeImpl> m_impl;
    QPointer<QOpcUaClient> m_client;

    struct AttributeWithStatus {
        QVariant attribute;
        QOpcUa::UaStatusCode statusCode;
    };
    QHash<QOpcUaNode::NodeAttribute, AttributeWithStatus> m_nodeAttributes;

    QMetaObject::Connection m_attributesReadConnection;
    QMetaObject::Connection m_attributeWrittenConnection;
};

QT_END_NAMESPACE

#endif // QOPCUANODE_P_H