//============================================================================
//  Copyright (c) Kitware, Inc.
//  All rights reserved.
//  See LICENSE.txt 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.
//
//  Copyright 2014 Sandia Corporation.
//  Copyright 2014 UT-Battelle, LLC.
//  Copyright 2014 Los Alamos National Security.
//
//  Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
//  the U.S. Government retains certain rights in this software.
//
//  Under the terms of Contract DE-AC52-06NA25396 with Los Alamos National
//  Laboratory (LANL), the U.S. Government retains certain rights in
//  this software.
//============================================================================

#include <vtkm/cont/testing/MakeTestDataSet.h>
#include <vtkm/cont/testing/Testing.h>
#include <vtkm/filter/PointAverage.h>

namespace
{

void TestPointAverageUniform3D()
{
  std::cout << "Testing PointAverage Filter on 3D structured data" << std::endl;

  vtkm::cont::testing::MakeTestDataSet testDataSet;
  vtkm::cont::DataSet dataSet = testDataSet.Make3DUniformDataSet0();

  vtkm::filter::Result result;
  vtkm::filter::PointAverage pointAverage;
  pointAverage.SetOutputFieldName("avgvals");

  result = pointAverage.Execute(dataSet, dataSet.GetField("cellvar"));

  VTKM_TEST_ASSERT(result.GetField().GetName() == "avgvals", "Field was given the wrong name.");
  VTKM_TEST_ASSERT(result.GetField().GetAssociation() == vtkm::cont::Field::ASSOC_POINTS,
                   "Field was given the wrong association.");
  vtkm::cont::ArrayHandle<vtkm::Float32> resultArrayHandle;
  bool valid = result.FieldAs(resultArrayHandle);

  if (valid)
  {
    vtkm::Float32 expected[18] = { 100.1f, 100.15f, 100.2f, 100.1f, 100.15f, 100.2f,
                                   100.2f, 100.25f, 100.3f, 100.2f, 100.25f, 100.3f,
                                   100.3f, 100.35f, 100.4f, 100.3f, 100.35f, 100.4f };
    for (vtkm::Id i = 0; i < 18; ++i)
    {
      VTKM_TEST_ASSERT(test_equal(resultArrayHandle.GetPortalConstControl().Get(i), expected[i]),
                       "Wrong result for PointAverage worklet on 3D regular data");
    }
  }
}

void TestPointAverageRegular3D()
{
  std::cout << "Testing PointAverage Filter on 2D strucutred data" << std::endl;

  vtkm::cont::testing::MakeTestDataSet testDataSet;
  vtkm::cont::DataSet dataSet = testDataSet.Make3DRectilinearDataSet0();

  vtkm::filter::Result result;
  vtkm::filter::PointAverage pointAverage;

  result = pointAverage.Execute(dataSet, dataSet.GetField("cellvar"));

  // If no name is given, should have the same name as the input.
  VTKM_TEST_ASSERT(result.GetField().GetName() == "cellvar", "Field was given the wrong name.");
  VTKM_TEST_ASSERT(result.GetField().GetAssociation() == vtkm::cont::Field::ASSOC_POINTS,
                   "Field was given the wrong association.");
  vtkm::cont::Field Result = result.GetField();
  vtkm::cont::ArrayHandle<vtkm::Float32> resultArrayHandle;
  Result.GetData().CopyTo(resultArrayHandle);

  if (result.IsValid())
  {
    vtkm::Float32 expected[18] = { 0.f, 0.5f, 1.f, 0.f, 0.5f, 1.f, 1.f, 1.5f, 2.f,
                                   1.f, 1.5f, 2.f, 2.f, 2.5f, 3.f, 2.f, 2.5f, 3.f };
    for (vtkm::Id i = 0; i < 18; ++i)
    {
      VTKM_TEST_ASSERT(test_equal(resultArrayHandle.GetPortalConstControl().Get(i), expected[i]),
                       "Wrong result for PointAverage worklet on 3D regular data");
    }
  }
}

void TestPointAverageExplicit1()
{
  std::cout << "Testing PointAverage Filter on Explicit data" << std::endl;

  vtkm::cont::testing::MakeTestDataSet testDataSet;
  vtkm::cont::DataSet dataSet = testDataSet.Make3DExplicitDataSet1();

  vtkm::filter::Result result;
  vtkm::filter::PointAverage pointAverage;

  result = pointAverage.Execute(dataSet, dataSet.GetField("cellvar"));

  // If no name is given, should have the same name as the input.
  VTKM_TEST_ASSERT(result.GetField().GetName() == "cellvar", "Field was given the wrong name.");
  VTKM_TEST_ASSERT(result.GetField().GetAssociation() == vtkm::cont::Field::ASSOC_POINTS,
                   "Field was given the wrong association.");
  vtkm::cont::ArrayHandle<vtkm::Float32> resultArrayHandle;
  const bool valid = result.FieldAs(resultArrayHandle);

  if (valid)
  {
    vtkm::Float32 expected[5] = { 100.1f, 100.15f, 100.15f, 100.2f, 100.2f };
    for (int i = 0; i < 5; ++i)
    {
      VTKM_TEST_ASSERT(test_equal(resultArrayHandle.GetPortalConstControl().Get(i), expected[i]),
                       "Wrong result for PointAverage worklet on 3D regular data");
    }
  }
}

void TestPointAverageExplicit2()
{
  std::cout << "Testing PointAverage Filter on Explicit data" << std::endl;

  vtkm::cont::testing::MakeTestDataSet testDataSet;
  vtkm::cont::DataSet dataSet = testDataSet.Make3DExplicitDataSet5();

  vtkm::filter::Result result;
  vtkm::filter::PointAverage pointAverage;

  result = pointAverage.Execute(dataSet, dataSet.GetField("cellvar"));

  // If no name is given, should have the same name as the input.
  VTKM_TEST_ASSERT(result.GetField().GetName() == "cellvar", "Field was given the wrong name.");
  VTKM_TEST_ASSERT(result.GetField().GetAssociation() == vtkm::cont::Field::ASSOC_POINTS,
                   "Field was given the wrong association.");
  vtkm::cont::ArrayHandle<vtkm::Float32> resultArrayHandle;
  const bool valid = result.FieldAs(resultArrayHandle);

  if (valid)
  {
    vtkm::Float32 expected[11] = { 100.1f, 105.05f, 105.05f, 100.1f, 115.3f, 115.2f,
                                   115.2f, 115.3f,  115.1f,  130.5f, 125.35f };
    for (int i = 0; i < 11; ++i)
    {
      VTKM_TEST_ASSERT(test_equal(resultArrayHandle.GetPortalConstControl().Get(i), expected[i]),
                       "Wrong result for PointAverage worklet on 3D regular data");
    }
  }
}

void TestPointAverage()
{
  TestPointAverageUniform3D();
  TestPointAverageRegular3D();
  TestPointAverageExplicit1();
  TestPointAverageExplicit2();
}
}

int UnitTestPointAverageFilter(int, char* [])
{
  return vtkm::cont::testing::Testing::Run(TestPointAverage);
}
