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#ifndef QT3DRENDER_QATTRIBUTE_H
#define QT3DRENDER_QATTRIBUTE_H

#include <Qt3DRender/qt3drender_global.h>
#include <Qt3DCore/qnode.h>
#include <QtCore/QSharedPointer>

QT_BEGIN_NAMESPACE

namespace Qt3DRender {

class QBuffer;
class QAttributePrivate;

typedef QSharedPointer<QBuffer> QBufferPtr;

class QT3DRENDERSHARED_EXPORT QAttribute : public Qt3DCore::QNode
{
    Q_OBJECT
    Q_PROPERTY(Qt3DRender::QBuffer *buffer READ buffer WRITE setBuffer NOTIFY bufferChanged)
    Q_PROPERTY(QString name READ name WRITE setName NOTIFY nameChanged)
    Q_PROPERTY(VertexBaseType vertexBaseType READ vertexBaseType WRITE setDataType NOTIFY dataTypeChanged)
    Q_PROPERTY(uint vertexSize READ vertexSize WRITE setDataSize NOTIFY dataSizeChanged)
    Q_PROPERTY(uint count READ count WRITE setCount NOTIFY countChanged)
    Q_PROPERTY(uint byteStride READ byteStride WRITE setByteStride NOTIFY byteStrideChanged)
    Q_PROPERTY(uint byteOffset READ byteOffset WRITE setByteOffset NOTIFY byteOffsetChanged)
    Q_PROPERTY(uint divisor READ divisor WRITE setDivisor NOTIFY divisorChanged)
    Q_PROPERTY(AttributeType attributeType READ attributeType WRITE setAttributeType NOTIFY attributeTypeChanged)

public:
    enum AttributeType {
        VertexAttribute,
        IndexAttribute
    };

    Q_ENUM(AttributeType)

    enum VertexBaseType {
        Byte = 0,
        UnsignedByte,
        Short,
        UnsignedShort,
        Int,
        UnsignedInt,
        HalfFloat,
        Float,
        Double
    };
    Q_ENUM(VertexBaseType)

    explicit QAttribute(QNode *parent = nullptr);
    explicit QAttribute(QBuffer *buf, VertexBaseType vertexBaseType, uint vertexSize, uint count, uint offset = 0, uint stride = 0, QNode *parent = nullptr);
    explicit QAttribute(QBuffer *buf, const QString &name, VertexBaseType vertexBaseType, uint vertexSize, uint count, uint offset = 0, uint stride = 0, QNode *parent = nullptr);
    ~QAttribute();

    QBuffer *buffer() const;
    QString name() const;
    VertexBaseType vertexBaseType() const;
    uint vertexSize() const;
    uint count() const;
    uint byteStride() const;
    uint byteOffset() const;
    uint divisor() const;
    AttributeType attributeType() const;

    Q_INVOKABLE static QString defaultPositionAttributeName();
    Q_INVOKABLE static QString defaultNormalAttributeName();
    Q_INVOKABLE static QString defaultColorAttributeName();
    Q_INVOKABLE static QString defaultTextureCoordinateAttributeName();
    Q_INVOKABLE static QString defaultTangentAttributeName();

public Q_SLOTS:
    void setBuffer(QBuffer *buffer);
    void setName(const QString &name);
    void setDataType(VertexBaseType type);
    void setDataSize(uint size);
    void setCount(uint count);
    void setByteStride(uint byteStride);
    void setByteOffset(uint byteOffset);
    void setDivisor(uint divisor);
    void setAttributeType(AttributeType attributeType);

Q_SIGNALS:
    void bufferChanged(QBuffer *buffer);
    void nameChanged(const QString &name);
    void dataTypeChanged(VertexBaseType vertexBaseType);
    void dataSizeChanged(uint vertexSize);
    void countChanged(uint count);
    void byteStrideChanged(uint byteStride);
    void byteOffsetChanged(uint byteOffset);
    void divisorChanged(uint divisor);
    void attributeTypeChanged(AttributeType attributeType);

private:
    Q_DECLARE_PRIVATE(QAttribute)
    Qt3DCore::QNodeCreatedChangeBasePtr createNodeCreationChange() const Q_DECL_OVERRIDE;
};

} // Qt3DRender

QT_END_NAMESPACE

#endif // QT3DRENDER_QATTRIBUTE_H
