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#ifndef SCENE3DVIEW_P_H
#define SCENE3DVIEW_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 <QtQuick/QQuickItem>
#include <QtCore/QFlags>
#include <Qt3DCore/qentity.h>
#include "scene3ditem_p.h"

QT_BEGIN_NAMESPACE

class QSGTexture;

namespace Qt3DRender {

class QLayer;
class QLayerFilter;
class Scene3DItem;
class QFrameGraphNode;
class QViewport;

class Scene3DView : public QQuickItem
{
    Q_OBJECT
    Q_PROPERTY(Qt3DCore::QEntity* entity READ entity WRITE setEntity NOTIFY entityChanged)
    Q_PROPERTY(Qt3DRender::Scene3DItem *scene3D READ scene3D WRITE setScene3D NOTIFY scene3DChanged)
    Q_CLASSINFO("DefaultProperty", "entity")

public:
    enum DirtyFlag {
        DirtyNode = 1 << 0,
        DirtyTexture = 1 << 1
    };
    Q_DECLARE_FLAGS(DirtyFlags, DirtyFlag)

    explicit Scene3DView(QQuickItem *parent = nullptr);
    ~Scene3DView();

    Qt3DCore::QEntity *entity() const;
    Scene3DItem *scene3D() const;

    Qt3DCore::QEntity *viewSubtree() const;
    Qt3DRender::QFrameGraphNode *viewFrameGraph() const;

    void setTexture(QSGTexture *texture);
    QSGTexture *texture() const;

    void markSGNodeDirty();

public Q_SLOTS:
    void setEntity(Qt3DCore::QEntity *entity);
    void setScene3D(Scene3DItem *scene3D);

Q_SIGNALS:
    void entityChanged();
    void scene3DChanged();

private:
    QSGNode *updatePaintNode(QSGNode *node, UpdatePaintNodeData *nodeData) override;
    void adoptSubtree(Qt3DCore::QEntity *subtree);
    void abandonSubtree(Qt3DCore::QEntity *subtree);

    Scene3DItem *m_scene3D;
    Qt3DCore::QEntity *m_entity;
    Qt3DCore::QNode *m_previousFGParent;

    Qt3DCore::QEntity *m_holderEntity;
    Qt3DRender::QLayer *m_holderLayer;
    Qt3DRender::QLayerFilter *m_holderLayerFilter;
    Qt3DRender::QViewport *m_holderViewport;

    QMetaObject::Connection m_scene3DDestroyedConnection;

    DirtyFlags m_dirtyFlags;
    QSGTexture *m_texture;
};

Q_DECLARE_OPERATORS_FOR_FLAGS(Scene3DView::DirtyFlags)


} // Qt3DRender

QT_END_NAMESPACE

#endif // SCENE3DVIEW_P_H