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#include "levelofdetail_p.h"
#include <Qt3DRender/QLevelOfDetail>
#include <Qt3DRender/private/qlevelofdetail_p.h>
#include <Qt3DRender/private/stringtoint_p.h>
#include <Qt3DCore/qpropertyupdatedchange.h>
#include <QVariant>

QT_BEGIN_NAMESPACE

using namespace Qt3DCore;

namespace Qt3DRender {
namespace Render {

LevelOfDetail::LevelOfDetail()
    : BackendNode(BackendNode::ReadWrite)
    , m_currentIndex(0)
    , m_thresholdType(QLevelOfDetail::DistanceToCameraThreshold)
    , m_volumeOverride()
{
}

LevelOfDetail::~LevelOfDetail()
{
    cleanup();
}

void LevelOfDetail::initializeFromPeer(const QNodeCreatedChangeBasePtr &change)
{
    const auto typedChange = qSharedPointerCast<Qt3DCore::QNodeCreatedChange<QLevelOfDetailData>>(change);
    const auto &data = typedChange->data;
    m_camera = data.camera;
    m_currentIndex = data.currentIndex;
    m_thresholdType = data.thresholdType;
    m_thresholds = data.thresholds;
    m_volumeOverride = data.volumeOverride;
}

void LevelOfDetail::cleanup()
{
    QBackendNode::setEnabled(false);
}

void LevelOfDetail::sceneChangeEvent(const QSceneChangePtr &e)
{
    if (e->type() == PropertyUpdated) {
        const QPropertyUpdatedChangePtr &propertyChange = qSharedPointerCast<QPropertyUpdatedChange>(e);
        if (propertyChange->propertyName() == QByteArrayLiteral("currentIndex"))
            m_currentIndex = propertyChange->value().value<int>();
        else if (propertyChange->propertyName() == QByteArrayLiteral("camera"))
            m_camera = propertyChange->value().value<Qt3DCore::QNodeId>();
        else if (propertyChange->propertyName() == QByteArrayLiteral("thresholdType"))
            m_thresholdType = propertyChange->value().value<QLevelOfDetail::ThresholdType>();
        else if (propertyChange->propertyName() == QByteArrayLiteral("thresholds"))
            m_thresholds = propertyChange->value().value<QVector<qreal>>();
        else if (propertyChange->propertyName() == QByteArrayLiteral("volumeOverride"))
            m_volumeOverride = propertyChange->value().value<Qt3DRender::QLevelOfDetailBoundingSphere>();
    }

    markDirty(AbstractRenderer::GeometryDirty);

    BackendNode::sceneChangeEvent(e);
}

void LevelOfDetail::setCurrentIndex(int currentIndex)
{
    if (m_currentIndex != currentIndex) {
        m_currentIndex = currentIndex;
        auto e = Qt3DCore::QPropertyUpdatedChangePtr::create(peerId());
        e->setDeliveryFlags(Qt3DCore::QSceneChange::DeliverToAll);
        e->setPropertyName("currentIndex");
        e->setValue(m_currentIndex);
        notifyObservers(e);
    }
}

} // namespace Render
} // namespace Qt3DRender

QT_END_NAMESPACE