/*=========================================================================
 *
 *  Copyright NumFOCUS
 *
 *  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.txt
 *
 *  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 "itkMesh.h"
#include "itkPolygonCell.h"

#include <iostream>
#include <string>

int
itkPolygonCellTest(int, char *[])
{
  /**
   * Define a mesh type that stores a PixelType of "int".  Use the defaults for
   * the other template parameters.
   */
  using MeshType = itk::Mesh<int>;
  using CellTraits = MeshType::CellTraits;

  /**
   * Define a few cell types which uses a PixelType of "int".  Again,
   * use the defaults for the other parameters.  Note that a cell's template
   * parameters must match those of the mesh into which it is inserted.
   */
  using CellInterfaceType = itk::CellInterface<int, CellTraits>;
  using PolygonCellType = itk::PolygonCell<CellInterfaceType>;


  /**
   * Typedef the generic cell type for the mesh.  It is an abstract class,
   * so we can only use information from it, like get its pointer type.
   */
  using CellType = MeshType::CellType;
  using CellAutoPointer = CellType::CellAutoPointer;

  /**
   * The type of point stored in the mesh. Because mesh was instantiated
   * with defaults (itkDefaultStaticMeshTraits), the point dimension is 3 and
   * the coordinate representation is float.
   */
  using PointType = MeshType::PointType;


  /**
   * Create the mesh through its object factory.
   */
  auto mesh = MeshType::New();
  mesh->DebugOn();

  /**
   * Define the 3d geometric positions for 8 points in a cube.
   */
  MeshType::CoordRepType testPointCoords[8][3] = { { 0, 0, 0 }, { 9, 0, 0 }, { 9, 0, 9 }, { 0, 0, 9 },
                                                   { 0, 9, 0 }, { 9, 9, 0 }, { 9, 9, 9 }, { 0, 9, 9 } };

  /**
   * Add our test points to the mesh.
   * mesh->SetPoint(pointId, point)
   * Note that the constructor for Point is public, and takes an array
   * of coordinates for the point.
   */
  for (int i = 0; i < 8; ++i)
  {
    mesh->SetPoint(i, PointType(testPointCoords[i]));
  }

  /**
   * Specify the method used for allocating cells
   */
  mesh->SetCellsAllocationMethod(MeshType::CellsAllocatedDynamicallyCellByCell);

  /**
   * Create the test cell. Note that testCell is a generic auto
   * pointer to a cell; in this example it ends up pointing to
   * different types of cells.
   */
  CellAutoPointer   testCell;
  PolygonCellType * newcell = new PolygonCellType;
  testCell.TakeOwnership(newcell); // polymorphism

  /**
   * List the points that the polygon will use from the mesh.
   */
  MeshType::PointIdentifier polygon1Points[4] = { 0, 1, 2, 3 };

  /**
   * Assign the points to the tetrahedron through their identifiers.
   */
  testCell->SetPointIds(polygon1Points);

  /**
   * Add the test cell to the mesh.
   * mesh->SetCell(cellId, cell)
   */
  mesh->SetCell(0, testCell); // Transfer ownership to the mesh
  std::cout << "PolygonCell pointer = " << (void const *)testCell.GetPointer() << std::endl;
  std::cout << "PolygonCell Owner   = " << testCell.IsOwner() << std::endl;

  {
    std::cout << "Test MakeCopy" << std::endl;

    CellAutoPointer anotherCell;

    testCell->MakeCopy(anotherCell);

    if (anotherCell->GetNumberOfPoints() != testCell->GetNumberOfPoints())
    {
      std::cerr << "Make Copy failed !" << std::endl;
      return EXIT_FAILURE;
    }
  }

  /**
   * Exercise the methods AddPointId() and RemovePointId()
   */
  {
    unsigned int np = newcell->GetNumberOfPoints();

    newcell->AddPointId(100);
    if (newcell->GetNumberOfPoints() != np + 1)
    {
      std::cerr << "AddPointId failed !" << std::endl;
      return EXIT_FAILURE;
    }

    newcell->RemovePointId(100);
    if (newcell->GetNumberOfPoints() != np)
    {
      std::cerr << "RemovePointId failed !" << std::endl;
      return EXIT_FAILURE;
    }
  }

  return EXIT_SUCCESS;
}
