/****************************************************************************
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** Copyright (C) 2014 Klaralvdalens Datakonsult AB (KDAB).
** Contact: https://www.qt.io/licensing/
**
** This file is part of the Qt3D module of the Qt Toolkit.
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** $QT_BEGIN_LICENSE:LGPL$
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** accordance with the commercial license agreement provided with the
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** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
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****************************************************************************/

#ifndef QT3DCORE_QASPECTMANAGER_P_H
#define QT3DCORE_QASPECTMANAGER_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 <Qt3DCore/qnodecreatedchange.h>
#include <QtCore/QObject>
#include <QtCore/QScopedPointer>
#include <QtCore/QSemaphore>
#include <QtCore/QVariant>
#include <QtCore/QVector>

#include <Qt3DCore/private/qt3dcore_global_p.h>

QT_BEGIN_NAMESPACE

class QSurface;

namespace Qt3DCore {

class QNode;
class QEntity;
class QScheduler;
class QChangeArbiter;
class QAbstractAspect;
class QAbstractAspectJobManager;
class QSceneObserverInterface;
class QServiceLocator;

class QT3DCORE_PRIVATE_EXPORT QAspectManager : public QObject
{
    Q_OBJECT
public:
    explicit QAspectManager(QObject *parent = 0);
    ~QAspectManager();

    void enterSimulationLoop();
    void exitSimulationLoop();

    bool isShuttingDown() const;

public Q_SLOTS:
    void initialize();
    void shutdown();

    void setRootEntity(Qt3DCore::QEntity *root, const QVector<Qt3DCore::QNodeCreatedChangeBasePtr> &changes);
    void registerAspect(Qt3DCore::QAbstractAspect *aspect);
    void unregisterAspect(Qt3DCore::QAbstractAspect *aspect);

    void exec();
    void quit();

public:
    const QVector<QAbstractAspect *> &aspects() const;
    QAbstractAspectJobManager *jobManager() const;
    QChangeArbiter *changeArbiter() const;
    QServiceLocator *serviceLocator() const;

private:
    QVector<QAbstractAspect *> m_aspects;
    QEntity *m_root;
    QVariantMap m_data;
    QScheduler *m_scheduler;
    QAbstractAspectJobManager *m_jobManager;
    QChangeArbiter *m_changeArbiter;
    QAtomicInt m_runSimulationLoop;
    QAtomicInt m_runMainLoop;
    QScopedPointer<QServiceLocator> m_serviceLocator;
    QSemaphore m_waitForEndOfSimulationLoop;
    QSemaphore m_waitForStartOfSimulationLoop;
    QSemaphore m_waitForEndOfExecLoop;
    QSemaphore m_waitForQuit;
};

} // namespace Qt3DCore

QT_END_NAMESPACE

#endif // QT3DCORE_QASPECTMANAGER_P_H
