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#include "mousehandler_p.h"

#include <Qt3DInput/qmousehandler.h>
#include <Qt3DInput/qmousedevice.h>
#include <Qt3DCore/qpropertyupdatedchange.h>

#include <Qt3DInput/private/inputmanagers_p.h>
#include <Qt3DInput/private/inputhandler_p.h>
#include <Qt3DInput/private/mousedevice_p.h>
#include <Qt3DInput/private/qmousehandler_p.h>

QT_BEGIN_NAMESPACE

using namespace Qt3DCore;

namespace Qt3DInput {
namespace Input {

MouseHandler::MouseHandler()
    : QBackendNode(ReadWrite)
    , m_inputHandler(nullptr)
{
}

MouseHandler::~MouseHandler()
{
}

void MouseHandler::initializeFromPeer(const Qt3DCore::QNodeCreatedChangeBasePtr &change)
{
    const auto typedChange = qSharedPointerCast<Qt3DCore::QNodeCreatedChange<QMouseHandlerData>>(change);
    const auto &data = typedChange->data;
    setDevice(data.mouseDeviceId);
}

Qt3DCore::QNodeId MouseHandler::mouseDevice() const
{
    return m_mouseDevice;
}

void MouseHandler::setInputHandler(InputHandler *handler)
{
    m_inputHandler = handler;
}

void MouseHandler::mouseEvent(const QMouseEventPtr &event)
{
    auto e = Qt3DCore::QPropertyUpdatedChangePtr::create(peerId());
    e->setDeliveryFlags(Qt3DCore::QSceneChange::DeliverToAll);
    e->setPropertyName("mouse");
    e->setValue(QVariant::fromValue(event));
    notifyObservers(e);
}

#if QT_CONFIG(wheelevent)
void MouseHandler::wheelEvent(const QWheelEventPtr &event)
{
    auto e = Qt3DCore::QPropertyUpdatedChangePtr::create(peerId());
    e->setDeliveryFlags(Qt3DCore::QSceneChange::DeliverToAll);
    e->setPropertyName("wheel");
    e->setValue(QVariant::fromValue(event));
    notifyObservers(e);
}
#endif

void MouseHandler::sceneChangeEvent(const Qt3DCore::QSceneChangePtr &e)
{
    if (e->type() == PropertyUpdated) {
        QPropertyUpdatedChangePtr propertyChange = qSharedPointerCast<QPropertyUpdatedChange>(e);
        if (propertyChange->propertyName() == QByteArrayLiteral("device")) {
            const QNodeId newId = propertyChange->value().value<QNodeId>();
            if (m_mouseDevice != newId) {
                setDevice(newId);
            }
        }
    }
    QBackendNode::sceneChangeEvent(e);
}

void MouseHandler::setDevice(Qt3DCore::QNodeId device)
{
    m_mouseDevice = device;
}

MouseHandlerFunctor::MouseHandlerFunctor(InputHandler *handler)
    : m_handler(handler)
{
}

Qt3DCore::QBackendNode *MouseHandlerFunctor::create(const Qt3DCore::QNodeCreatedChangeBasePtr &change) const
{
    MouseHandler *input = m_handler->mouseInputManager()->getOrCreateResource(change->subjectId());
    input->setInputHandler(m_handler);
    return input;
}

Qt3DCore::QBackendNode *MouseHandlerFunctor::get(Qt3DCore::QNodeId id) const
{
    return m_handler->mouseInputManager()->lookupResource(id);
}

void MouseHandlerFunctor::destroy(Qt3DCore::QNodeId id) const
{
    m_handler->mouseInputManager()->releaseResource(id);
}

} // namespace Input
} // namespace Qt3DInput

QT_END_NAMESPACE