/* 
* Copyright 2026 Forschungszentrum Jülich
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
*    https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/

#include "CageControlPointItem.h"
#include "LayerItem.h"

#include "../core/Config.h"

#include <QGraphicsSceneMouseEvent>
#include <iostream>

CageControlPointItem::CageControlPointItem( LayerItem* layer, int index )
    : QGraphicsRectItem(-4, -4, 8, 8),
      m_layer(layer), m_index(index)
{
	setBrush(Qt::red);
    setZValue(10001);
    setFlag(ItemIsMovable);
    setFlag(ItemSendsScenePositionChanges);
}

void CageControlPointItem::mousePressEvent( QGraphicsSceneMouseEvent *e )
{
  qCDebug(logEditor) << "CageControlPointItem::mousePressEvent((): Processing...";
  {
    if ( m_layer == nullptr ) return;

    // The purpose of this offset is to account for the small
    // distance between the mouse click position and the center of
    // the control point. This gives a smooth motion of the cage.

    if( m_index >=0 && m_index < m_layer->cageMesh().points().size() ) {
      QPointF local = m_layer->mapFromScene(e->scenePos());
      QList<QPointF> pts = m_layer->cageMesh().points();
      m_clickOffset = local - pts[m_index];
    } else {
      std::cout << "CLAUDE: m_index not defined when moving cage control point." << std::endl;
    }
    m_lastPos = e->scenePos();
    m_layer->setCageEditing(true);
  }
}

void CageControlPointItem::mouseMoveEvent( QGraphicsSceneMouseEvent* e )
{
  qCDebug(logEditor) << "CageControlPointItem::mouseMoveEvent((): Processing...";
  {
    if ( m_layer == nullptr ) return;
    m_layer->setCagePoint(m_index, e->scenePos() - m_clickOffset );
    e->accept();
  }
}

void CageControlPointItem::mouseReleaseEvent( QGraphicsSceneMouseEvent* e )
{
  qCDebug(logEditor) << "CageControlPointItem::mouseReleaseEvent((): Processing...";
  {
    if ( m_layer == nullptr ) return;
    m_layer->setCageEditing(false);
    e->accept();
  }
}