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#ifndef QT3DLOGIC_LOGIC_EXECUTOR_P_H
#define QT3DLOGIC_LOGIC_EXECUTOR_P_H

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

#include <QtCore/qobject.h>
#include <QtCore/qcoreevent.h>
#include <Qt3DCore/qnodeid.h>

QT_BEGIN_NAMESPACE

class QSemaphore;

namespace Qt3DCore {
class QScene;
}

namespace Qt3DLogic {
namespace Logic {

class FrameUpdateEvent : public QEvent
{
public:
    FrameUpdateEvent(float dt)
        : QEvent(QEvent::User)
        , m_dt(dt)
    {}

    float deltaTime() const { return m_dt; }

private:
    float m_dt;
};

class Executor : public QObject
{
    Q_OBJECT
public:
    explicit Executor(QObject *parent = 0);

    void setScene(Qt3DCore::QScene *scene) { m_scene = scene; }
    void setSemephore(QSemaphore *semaphore) { m_semaphore = semaphore; }
    void clearQueueAndProceed();

public Q_SLOTS:
    void enqueueLogicFrameUpdates(const QVector<Qt3DCore::QNodeId> &nodeIds);

protected:
    bool event(QEvent *e);
    void processLogicFrameUpdates(float dt);

private:
    QVector<Qt3DCore::QNodeId> m_nodeIds;
    Qt3DCore::QScene *m_scene;
    QSemaphore *m_semaphore;
};

} // namespace Logic
} // namespace Qt3DLogic

QT_END_NAMESPACE

#endif // QT3DLOGIC_LOGIC_EXECUTOR_P_H