/*=========================================================================

  Program:   Visualization Toolkit
  Module:    TestOBJReaderMaterials.cxx

  Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
  All rights reserved.
  See Copyright.txt or http://www.kitware.com/Copyright.htm for details.

     This software is distributed WITHOUT ANY WARRANTY; without even
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
     PURPOSE.  See the above copyright notice for more information.

=========================================================================*/
// .NAME Verifies that vtkOBJReader does something sensible w/rt materials.
// .SECTION Description
//

#include "vtkOBJReader.h"

#include "vtkCellData.h"
#include "vtkStringArray.h"
#include "vtkTestUtilities.h"

int TestOBJReaderMaterials( int argc, char *argv[] )
{
  int retVal = 0;

  // Create the reader.
  char* fname = vtkTestUtilities::ExpandDataFileName(
    argc, argv, "Data/obj_with_materials.obj");
  vtkSmartPointer<vtkOBJReader> reader =
    vtkSmartPointer<vtkOBJReader>::New();
  reader->SetFileName(fname);
  reader->Update();
  delete [] fname;

  vtkPolyData *data = reader->GetOutput();

  if(!data)
  {
    std::cerr << "Could not read data" << std::endl;
    return 1;
  }
  vtkStringArray *mna = vtkStringArray::SafeDownCast(
    data->GetFieldData()->GetAbstractArray("MaterialNames"));
  if(!mna)
  {
    std::cerr << "missing material names array" << std::endl;
    return 1;
  }
  vtkIntArray *mia = vtkIntArray::SafeDownCast(
    data->GetCellData()->GetAbstractArray("MaterialIds"));
  if(!mia)
  {
    std::cerr << "missing material id array" << std::endl;
    return 1;
  }
  if (data->GetNumberOfCells() != 2)
  {
    std::cerr << "wrong number of cells" << std::endl;
    return 1;
  }
  int matid = mia->GetVariantValue(1).ToInt();
  std::string matname = mna->GetVariantValue(matid).ToString();
  if (matname != "Air")
  {
    std::cerr << "wrong material for" << std::endl;
    return 1;
  }


  return retVal;
}
