/* ========================================================================= *
 *                                                                           *
 *                               OpenMesh                                    *
 *           Copyright (c) 2001-2019, RWTH-Aachen University                 *
 *           Department of Computer Graphics and Multimedia                  *
 *                          All rights reserved.                             *
 *                            www.openmesh.org                               *
 *                                                                           *
 *---------------------------------------------------------------------------*
 * This file is part of OpenMesh.                                            *
 *---------------------------------------------------------------------------*
 *                                                                           *
 * Redistribution and use in source and binary forms, with or without        *
 * modification, are permitted provided that the following conditions        *
 * are met:                                                                  *
 *                                                                           *
 * 1. Redistributions of source code must retain the above copyright notice, *
 *    this list of conditions and the following disclaimer.                  *
 *                                                                           *
 * 2. Redistributions in binary form must reproduce the above copyright      *
 *    notice, this list of conditions and the following disclaimer in the    *
 *    documentation and/or other materials provided with the distribution.   *
 *                                                                           *
 * 3. Neither the name of the copyright holder nor the names of its          *
 *    contributors may be used to endorse or promote products derived from   *
 *    this software without specific prior written permission.               *
 *                                                                           *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS       *
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED *
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A           *
 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER *
 * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,  *
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,       *
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR        *
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF    *
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING      *
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS        *
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.              *
 *                                                                           *
 * ========================================================================= */


#ifndef OPENMESH_SMARTHANDLES_HH
#define OPENMESH_SMARTHANDLES_HH


//== INCLUDES =================================================================

#include "Handles.hh"


//== NAMESPACES ===============================================================

namespace OpenMesh {

//== FORWARD DECLARATION ======================================================

class PolyConnectivity;
struct SmartVertexHandle;
struct SmartHalfedgeHandle;
struct SmartEdgeHandle;
struct SmartFaceHandle;


//== CLASS DEFINITION =========================================================

class SmartBaseHandle : public BaseHandle
{
public:
  explicit SmartBaseHandle(int _idx=-1, PolyConnectivity* _mesh = nullptr) : BaseHandle(_idx), mesh_(_mesh) {}

  /// Get the underlying mesh of this handle
  PolyConnectivity* mesh() const { return mesh_; }

  // TODO: should operators ==, !=, < look at mesh_?

private:
  PolyConnectivity* mesh_;

};

struct SmartVertexHandle : public SmartBaseHandle, VertexHandle
{
  explicit SmartVertexHandle(int _idx=-1, PolyConnectivity* _mesh = nullptr) : SmartBaseHandle(_idx, _mesh) {}

  SmartHalfedgeHandle out();
  SmartHalfedgeHandle halfedge(); // alias for out
  SmartHalfedgeHandle in();
};

struct SmartHalfedgeHandle : public SmartBaseHandle, HalfedgeHandle
{
  explicit SmartHalfedgeHandle(int _idx=-1, PolyConnectivity* _mesh = nullptr) : SmartBaseHandle(_idx, _mesh) {}

  SmartHalfedgeHandle next();
  SmartHalfedgeHandle prev();
  SmartHalfedgeHandle opp();
  SmartVertexHandle   to();
  SmartVertexHandle   from();
  SmartFaceHandle     face();
};

struct SmartEdgeHandle : public SmartBaseHandle, EdgeHandle
{
  explicit SmartEdgeHandle(int _idx=-1, PolyConnectivity* _mesh = nullptr) : SmartBaseHandle(_idx, _mesh) {}

  SmartHalfedgeHandle h(unsigned int _i);
  SmartHalfedgeHandle h0();
  SmartHalfedgeHandle h1();
  SmartVertexHandle   v(unsigned int _i);
  SmartVertexHandle   v0();
  SmartVertexHandle   v1();
};

struct SmartFaceHandle : public SmartBaseHandle, FaceHandle
{
  explicit SmartFaceHandle(int _idx=-1, PolyConnectivity* _mesh = nullptr) : SmartBaseHandle(_idx, _mesh) {}

  SmartHalfedgeHandle halfedge();
};


inline SmartVertexHandle   make_smart(VertexHandle _vh,    PolyConnectivity* _mesh) { return SmartVertexHandle  (_vh.idx(), _mesh); }
inline SmartHalfedgeHandle make_smart(HalfedgeHandle _vh,  PolyConnectivity* _mesh) { return SmartHalfedgeHandle(_vh.idx(), _mesh); }
inline SmartEdgeHandle     make_smart(EdgeHandle _vh,      PolyConnectivity* _mesh) { return SmartEdgeHandle    (_vh.idx(), _mesh); }
inline SmartFaceHandle     make_smart(FaceHandle _vh,      PolyConnectivity* _mesh) { return SmartFaceHandle    (_vh.idx(), _mesh); }


//=============================================================================
} // namespace OpenMesh
//=============================================================================


#endif // OPENMESH_SMARTHANDLES_HH
//=============================================================================