/****************************************************************************
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** Copyright (C) 2014 Klaralvdalens Datakonsult AB (KDAB).
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****************************************************************************/

#ifndef QT3D_QBACKENDNODE_H
#define QT3D_QBACKENDNODE_H

#include <Qt3DCore/qt3dcore_global.h>
#include <Qt3DCore/qscenechange.h>
#include <Qt3DCore/qnodeid.h>

QT_BEGIN_NAMESPACE

namespace Qt3D {

class QBackendNodeFactory;
class QBackendNodePrivate;
class QBackendNode;
class QAspectEngine;

class QT3DCORESHARED_EXPORT QBackendNodeFunctor
{
public:
    virtual ~QBackendNodeFunctor() {}
    virtual QBackendNode *create(QNode *frontend, const QBackendNodeFactory *factory) const = 0;
    virtual QBackendNode *get(const QNodeId &id) const = 0;
    virtual void destroy(const QNodeId &id) const = 0;
};

typedef QSharedPointer<QBackendNodeFunctor> QBackendNodeFunctorPtr;

class QT3DCORESHARED_EXPORT QBackendNode
{
public:
    enum Mode {
        ReadOnly = 0,
        ReadWrite
    };

    explicit QBackendNode(Mode mode = ReadOnly);
    virtual ~QBackendNode();

    void setFactory(const QBackendNodeFactory *factory);

    void setPeer(QNode *peer);
    QNodeId peerUuid() const;

    Mode mode() const;
    virtual void updateFromPeer(QNode *peer) = 0;

protected:
    QBackendNode *createBackendNode(QNode *frontend) const;
    void notifyObservers(const QSceneChangePtr &e);
    virtual void sceneChangeEvent(const QSceneChangePtr &e) = 0;

    QBackendNode(QBackendNodePrivate &dd);

private:
    Q_DECLARE_PRIVATE(QBackendNode)
    QBackendNodePrivate *d_ptr;
    friend class QBackendScenePropertyChange;
};


} // Qt3D

QT_END_NAMESPACE

#endif // QT3D_QBACKENDNODE_H