/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/*
 * This file is part of the libmspub project.
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 */

#ifndef INCLUDED_SHAPEGROUPELEMENT_H
#define INCLUDED_SHAPEGROUPELEMENT_H

#include <functional>
#include <memory>
#include <vector>

#include <boost/optional.hpp>

#include "ShapeInfo.h"
#include "VectorTransformation2D.h"

namespace libmspub
{

struct Coordinate;

class ShapeGroupElement
{
  boost::optional<ShapeInfo> m_shapeInfo;
  std::weak_ptr<ShapeGroupElement> m_parent;
  std::vector<std::shared_ptr<ShapeGroupElement>> m_children;
  unsigned m_seqNum;
  ShapeGroupElement &operator=(const ShapeGroupElement &) = delete;
  ShapeGroupElement(const ShapeGroupElement &) = delete;
  VectorTransformation2D m_transform;
  ShapeGroupElement(const std::shared_ptr<ShapeGroupElement> &parent, unsigned seqNum);

public:
  ~ShapeGroupElement();
  static std::shared_ptr<ShapeGroupElement> create(const std::shared_ptr<ShapeGroupElement> &parent, unsigned seqNum = 0);

  void setShapeInfo(const ShapeInfo &shapeInfo);
  void setup(std::function<void(ShapeGroupElement &self)> visitor);
  void visit(std::function<
             std::function<void(void)>
             (const ShapeInfo &info, const Coordinate &relativeTo, const VectorTransformation2D &foldedTransform, bool isGroup, const VectorTransformation2D &thisTransform)> visitor,
             const Coordinate &relativeTo, const VectorTransformation2D &foldedTransform) const;
  void visit(std::function<
             std::function<void(void)>
             (const ShapeInfo &info, const Coordinate &relativeTo, const VectorTransformation2D &foldedTransform, bool isGroup, const VectorTransformation2D &thisTransform)> visitor) const;
  bool isGroup() const;
  std::shared_ptr<ShapeGroupElement> getParent() const;
  void setSeqNum(unsigned seqNum);
  void setTransform(const VectorTransformation2D &transform);
  unsigned getSeqNum() const;
};
}

#endif
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