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#ifndef QT3DRENDER_RENDER_TEXTUREDATAMANAGER_H
#define QT3DRENDER_RENDER_TEXTUREDATAMANAGER_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/private/qresourcemanager_p.h>
#include <Qt3DRender/qtexture.h>
#include <Qt3DRender/qtexturedata.h>
#include <Qt3DRender/private/handle_types_p.h>

#include <QPair>
#include <Qt3DCore/qnodeid.h>

QT_BEGIN_NAMESPACE

namespace Qt3DRender {

namespace Render {

typedef QPair<QTextureDataFunctorPtr, QVector<HTextureImage> > FunctorImageHandlesPair;
typedef QPair<QTextureDataFunctorPtr, HTextureData> FunctorTextureDataPair;

class TextureDataManager : public Qt3DCore::QResourceManager<QTexImageData,
                                                         Qt3DCore::QNodeId,
                                                         16,
                                                         Qt3DCore::ArrayAllocatingPolicy,
                                                         Qt3DCore::ObjectLevelLockingPolicy>
{
public:
    TextureDataManager();
    void addToPendingTextures(const Qt3DCore::QNodeId &textureId);

    QVector<Qt3DCore::QNodeId> texturesPending();

    HTextureData textureDataFromFunctor(const QTextureDataFunctorPtr &functor) const;
    void addTextureDataForFunctor(HTextureData textureDataHandle, const QTextureDataFunctorPtr &functor);
    void removeTextureDataFunctor(const QTextureDataFunctorPtr &functor);

    void assignFunctorToTextureImage(const QTextureDataFunctorPtr &functor, HTextureImage imageHandle);

    QMutex *mutex() const;
    void cleanup();

private:
    QVector<Qt3DCore::QNodeId> m_texturesPending;
    QVector<FunctorTextureDataPair > m_textureDataFunctors;
    QVector<FunctorImageHandlesPair > m_texturesImagesPerFunctor;
    mutable QMutex m_mutex;
    QVector<HTextureData> m_textureHandlesToRelease;
};

} // namespace Render
} // namespace Qt3DRender

Q_DECLARE_RESOURCE_INFO(Qt3DRender::QTexImageData, Q_REQUIRES_CLEANUP)

QT_END_NAMESPACE

#endif // TEXTUREDATAMANAGER_H
