//============================================================================
//  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/ArrayHandleUniformPointCoordinates.h>

#include <vtkm/cont/testing/Testing.h>

namespace {

typedef vtkm::Vec<vtkm::FloatDefault, 3> Vector3;

const vtkm::Id3 MIN_VALUES(-5, 8, 40);
const vtkm::Id3 MAX_VALUES(10, 25, 44);
const vtkm::Id3 POINT_DIMS(16, 18,  5);
const vtkm::Id NUM_POINTS = 1440;

const Vector3 ORIGIN(30, -3, -14);
const Vector3 SPACING(10, 1, 0.1f);
const Vector3 LOWER_LEFT(-20, 5, -10); // MIN_VALUES*SPACING + ORIGIN

void TestArrayHandleUniformPointCoordinates()
{
  std::cout << "Creating ArrayHandleUniformPointCoordinates" << std::endl;

  vtkm::cont::ArrayHandleUniformPointCoordinates arrayHandle(
        vtkm::Extent3(MIN_VALUES, MAX_VALUES), ORIGIN, SPACING);
  VTKM_TEST_ASSERT(arrayHandle.GetNumberOfValues() == NUM_POINTS,
                   "Array computed wrong number of points.");

  std::cout << "Getting array portal." << std::endl;
  vtkm::cont::internal::ArrayPortalUniformPointCoordinates portal =
      arrayHandle.GetPortalConstControl();
  VTKM_TEST_ASSERT(portal.GetNumberOfValues() == NUM_POINTS,
                   "Portal has wrong number of points.");
  VTKM_TEST_ASSERT(portal.GetRange3() == POINT_DIMS,
                   "Portal range is wrong.");

  std::cout << "Checking computed values of portal." << std::endl;
  Vector3 expectedValue;
  vtkm::Id flatIndex = 0;
  vtkm::Id3 blockIndex;
  expectedValue[2] = LOWER_LEFT[2];
  for (blockIndex[2] = 0; blockIndex[2] < POINT_DIMS[2]; blockIndex[2]++)
  {
    expectedValue[1] = LOWER_LEFT[1];
    for (blockIndex[1] = 0; blockIndex[1] < POINT_DIMS[1]; blockIndex[1]++)
    {
      expectedValue[0] = LOWER_LEFT[0];
      for (blockIndex[0] = 0; blockIndex[0] < POINT_DIMS[0]; blockIndex[0]++)
      {
        VTKM_TEST_ASSERT(test_equal(expectedValue, portal.Get(flatIndex)),
                         "Got wrong value for flat index.");

        VTKM_TEST_ASSERT(test_equal(expectedValue, portal.Get(blockIndex)),
                         "Got wrong value for block index.");

        flatIndex++;
        expectedValue[0] += SPACING[0];
      }
      expectedValue[1] += SPACING[1];
    }
    expectedValue[2] += SPACING[2];
  }
}

} // anonymous namespace

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