#pragma once

#include <QtCore/QUuid>
#include <QtWidgets/QGraphicsObject>

#include "Connection.hpp"

#include "NodeGeometry.hpp"
#include "NodeState.hpp"

class QGraphicsProxyWidget;

namespace QtNodes
{

class NodeGraphicsScene;
class FlowItemEntry;


class NodeGraphicsObject : public QGraphicsObject
{
  Q_OBJECT

public:
  NodeGraphicsObject(NodeGraphicsScene &scene, NodeId node);

  virtual ~NodeGraphicsObject();

  NodeId nodeId() { return _nodeId; }

  NodeId nodeId() const { return _nodeId; }

  QRectF boundingRect() const override;

  void setGeometryChanged();

  /// Visits all attached connections and corrects
  /// their corresponding end points.
  void moveConnections() const;

  enum { Type = UserType + 1 };

  int type() const override { return Type; }

  void lock(bool locked = true);

  void unlock() { lock(false); }

protected:
  void paint(QPainter*                       painter,
             QStyleOptionGraphicsItem const* option,
             QWidget*                        widget = 0) override;

  QVariant itemChange(GraphicsItemChange change, const QVariant &value) override;

  void mousePressEvent(QGraphicsSceneMouseEvent* event) override;

  void mouseMoveEvent(QGraphicsSceneMouseEvent* event) override;

  void mouseReleaseEvent(QGraphicsSceneMouseEvent* event) override;

  void hoverEnterEvent(QGraphicsSceneHoverEvent* event) override;

  void hoverLeaveEvent(QGraphicsSceneHoverEvent* event) override;

  void hoverMoveEvent(QGraphicsSceneHoverEvent *) override;

  void mouseDoubleClickEvent(QGraphicsSceneMouseEvent* event) override;

  void contextMenuEvent(QGraphicsSceneContextMenuEvent* event) override;

private:

  //void embedQWidget();

private:

  NodeGraphicsScene & _scene;

  NodeId _nodeId;

  bool _locked;

  // either nullptr or owned by parent QGraphicsItem
  QGraphicsProxyWidget * _proxyWidget;
};
}