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#include "transform_p.h"

#include <Qt3DCore/qscenepropertychange.h>
#include <Qt3DCore/private/qchangearbiter_p.h>
#include <Qt3DCore/qtransform.h>

QT_BEGIN_NAMESPACE

using namespace Qt3DCore;

namespace Qt3DRender {
namespace Render {

Transform::Transform()
    : QBackendNode()
    , m_rotation()
    , m_scale(1.0f, 1.0f, 1.0f)
    , m_translation()
{
}

void Transform::updateFromPeer(Qt3DCore::QNode *peer)
{
    Qt3DCore::QTransform *transform = static_cast<Qt3DCore::QTransform *>(peer);

    m_rotation = transform->rotation();
    m_scale = transform->scale3D();
    m_translation = transform->translation();
    updateMatrix();
    m_enabled = transform->isEnabled();
}

QMatrix4x4 Transform::transformMatrix() const
{
    return m_transformMatrix;
}

void Transform::sceneChangeEvent(const Qt3DCore::QSceneChangePtr &e)
{
    // TODO: Flag the matrix as dirty and update all matrices batched in a job
    if (e->type() == NodeUpdated) {
        const QScenePropertyChangePtr &propertyChange = qSharedPointerCast<QScenePropertyChange>(e);
        if (propertyChange->propertyName() == QByteArrayLiteral("scale3D")) {
            m_scale = propertyChange->value().value<QVector3D>();
            updateMatrix();
        } else if (propertyChange->propertyName() == QByteArrayLiteral("rotation")) {
            m_rotation = propertyChange->value().value<QQuaternion>();
            updateMatrix();
        } else if (propertyChange->propertyName() == QByteArrayLiteral("translation")) {
            m_translation = propertyChange->value().value<QVector3D>();
            updateMatrix();
        } else if (propertyChange->propertyName() == QByteArrayLiteral("enabled")) {
            m_enabled = propertyChange->value().toBool();
        }
    }
}

void Transform::updateMatrix()
{
    QMatrix4x4 m;
    m.translate(m_translation);
    m.rotate(m_rotation);
    m.scale(m_scale);
    m_transformMatrix = m;
}

} // namespace Render
} // namespace Qt3DRender

QT_END_NAMESPACE