//============================================================================
//  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.
//============================================================================
//  Copyright (c) 2016, Los Alamos National Security, LLC
//  All rights reserved.
//
//  Copyright 2016. Los Alamos National Security, LLC. 
//  This software was produced under U.S. Government contract DE-AC52-06NA25396 
//  for Los Alamos National Laboratory (LANL), which is operated by 
//  Los Alamos National Security, LLC for the U.S. Department of Energy. 
//  The U.S. Government has rights to use, reproduce, and distribute this 
//  software.  NEITHER THE GOVERNMENT NOR LOS ALAMOS NATIONAL SECURITY, LLC 
//  MAKES ANY WARRANTY, EXPRESS OR IMPLIED, OR ASSUMES ANY LIABILITY FOR THE 
//  USE OF THIS SOFTWARE.  If software is modified to produce derivative works, 
//  such modified software should be clearly marked, so as not to confuse it 
//  with the version available from LANL.
//
//  Additionally, 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 Los Alamos National Security, LLC, Los Alamos 
//     National Laboratory, LANL, the U.S. Government, 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 LOS ALAMOS NATIONAL SECURITY, LLC 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 LOS ALAMOS 
//  NATIONAL SECURITY, LLC 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.
//============================================================================

//  This code is based on the algorithm presented in the paper:  
//  “Parallel Peak Pruning for Scalable SMP Contour Tree Computation.” 
//  Hamish Carr, Gunther Weber, Christopher Sewell, and James Ahrens. 
//  Proceedings of the IEEE Symposium on Large Data Analysis and Visualization 
//  (LDAV), October 2016, Baltimore, Maryland.

#include <vtkm/worklet/ContourTreeUniform.h>

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

namespace {

using vtkm::cont::testing::MakeTestDataSet;

template <typename DeviceAdapter>
class TestContourTreeUniform
{
public:
  //
  // Create a uniform 2D structured cell set as input with values for contours
  //
  void TestContourTree_Mesh2D_DEM_Triangulation() const
  {
    std::cout << "Testing ContourTree_Mesh2D Filter" << std::endl;
  
    // Create the input uniform cell set with values to contour
    vtkm::cont::DataSet dataSet = MakeTestDataSet().Make2DUniformDataSet1();
  
    vtkm::cont::CellSetStructured<2> cellSet;
    dataSet.GetCellSet().CopyTo(cellSet);
  
    vtkm::Id2 pointDimensions = cellSet.GetPointDimensions();
    vtkm::Id nRows = pointDimensions[0];
    vtkm::Id nCols = pointDimensions[1];
  
    vtkm::cont::ArrayHandle<vtkm::Float32> fieldArray;
    dataSet.GetField("pointvar").GetData().CopyTo(fieldArray);
  
    // Output saddle peak pairs array
    vtkm::cont::ArrayHandle<vtkm::Pair<vtkm::Id, vtkm::Id> > saddlePeak;
  
    // Create the worklet and run it
    vtkm::worklet::ContourTreeMesh2D contourTreeMesh2D;
  
    contourTreeMesh2D.Run(fieldArray,
                          nRows,
                          nCols,
                          saddlePeak,
                          DeviceAdapter());
  
    VTKM_TEST_ASSERT(test_equal(saddlePeak.GetNumberOfValues(), 7), 
                     "Wrong result for ContourTree filter");
    VTKM_TEST_ASSERT(test_equal(saddlePeak.GetPortalControl().Get(0), 
                     vtkm::make_Pair( 0, 12)), "Wrong result for ContourTree filter");
    VTKM_TEST_ASSERT(test_equal(saddlePeak.GetPortalControl().Get(1), 
                     vtkm::make_Pair( 4, 13)), "Wrong result for ContourTree filter");
    VTKM_TEST_ASSERT(test_equal(saddlePeak.GetPortalControl().Get(2), 
                     vtkm::make_Pair(12, 13)), "Wrong result for ContourTree filter");
    VTKM_TEST_ASSERT(test_equal(saddlePeak.GetPortalControl().Get(3), 
                     vtkm::make_Pair(12, 18)), "Wrong result for ContourTree filter");
    VTKM_TEST_ASSERT(test_equal(saddlePeak.GetPortalControl().Get(4), 
                     vtkm::make_Pair(12, 20)), "Wrong result for ContourTree filter");
    VTKM_TEST_ASSERT(test_equal(saddlePeak.GetPortalControl().Get(5), 
                     vtkm::make_Pair(13, 14)), "Wrong result for ContourTree filter");
    VTKM_TEST_ASSERT(test_equal(saddlePeak.GetPortalControl().Get(6), 
                     vtkm::make_Pair(13, 19)), "Wrong result for ContourTree filter");
  }

  //
  // Create a uniform 3D structured cell set as input with values for contours
  //
  void TestContourTree_Mesh3D_DEM_Triangulation() const
  {
    std::cout << "Testing ContourTree_Mesh3D Filter" << std::endl;
  
    // Create the input uniform cell set with values to contour
    vtkm::cont::DataSet dataSet = MakeTestDataSet().Make3DUniformDataSet1();
  
    vtkm::cont::CellSetStructured<3> cellSet;
    dataSet.GetCellSet().CopyTo(cellSet);
  
    vtkm::Id3 pointDimensions = cellSet.GetPointDimensions();
    vtkm::Id nRows = pointDimensions[0];
    vtkm::Id nCols = pointDimensions[1];
    vtkm::Id nSlices = pointDimensions[2];
  
    vtkm::cont::ArrayHandle<vtkm::Float32> fieldArray;
    dataSet.GetField("pointvar").GetData().CopyTo(fieldArray);
  
    // Output saddle peak pairs array
    vtkm::cont::ArrayHandle<vtkm::Pair<vtkm::Id, vtkm::Id> > saddlePeak;
  
    // Create the worklet and run it
    vtkm::worklet::ContourTreeMesh3D contourTreeMesh3D;
  
    contourTreeMesh3D.Run(fieldArray,
                          nRows,
                          nCols,
                          nSlices,
                          saddlePeak,
                          DeviceAdapter());
  
    VTKM_TEST_ASSERT(test_equal(saddlePeak.GetNumberOfValues(), 9), 
                     "Wrong result for ContourTree filter");
    VTKM_TEST_ASSERT(test_equal(saddlePeak.GetPortalControl().Get(0), 
                     vtkm::make_Pair( 0, 67)), "Wrong result for ContourTree filter");
    VTKM_TEST_ASSERT(test_equal(saddlePeak.GetPortalControl().Get(1), 
                     vtkm::make_Pair(31, 42)), "Wrong result for ContourTree filter");
    VTKM_TEST_ASSERT(test_equal(saddlePeak.GetPortalControl().Get(2), 
                     vtkm::make_Pair(42, 43)), "Wrong result for ContourTree filter");
    VTKM_TEST_ASSERT(test_equal(saddlePeak.GetPortalControl().Get(3), 
                     vtkm::make_Pair(42, 56)), "Wrong result for ContourTree filter");
    VTKM_TEST_ASSERT(test_equal(saddlePeak.GetPortalControl().Get(4), 
                     vtkm::make_Pair(56, 67)), "Wrong result for ContourTree filter");
    VTKM_TEST_ASSERT(test_equal(saddlePeak.GetPortalControl().Get(5), 
                     vtkm::make_Pair(56, 92)), "Wrong result for ContourTree filter");
    VTKM_TEST_ASSERT(test_equal(saddlePeak.GetPortalControl().Get(6), 
                     vtkm::make_Pair(62, 67)), "Wrong result for ContourTree filter");
    VTKM_TEST_ASSERT(test_equal(saddlePeak.GetPortalControl().Get(7), 
                     vtkm::make_Pair(81, 92)), "Wrong result for ContourTree filter");
    VTKM_TEST_ASSERT(test_equal(saddlePeak.GetPortalControl().Get(8), 
                     vtkm::make_Pair(92, 93)), "Wrong result for ContourTree filter");
  }
  
  void operator()() const
  {
    this->TestContourTree_Mesh2D_DEM_Triangulation();
    this->TestContourTree_Mesh3D_DEM_Triangulation();
  }
};

}

int UnitTestContourTreeUniform(int, char *[])
{
  return vtkm::cont::testing::Testing::Run(
    TestContourTreeUniform<VTKM_DEFAULT_DEVICE_ADAPTER_TAG>());
}
