/*=========================================================================
 *
 *  Copyright Insight Software Consortium
 *
 *  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
 *
 *         http://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 <fstream>

#include "itkPointSetToListSampleAdaptor.h"

int itkPointSetToListSampleAdaptorTest( int, char * [] )
{
  typedef itk::PointSet< double, 3 >                                   PointSetType;
  typedef itk::Statistics::PointSetToListSampleAdaptor< PointSetType > PointSetToListSampleAdaptorType;

  PointSetType::Pointer pointSet = PointSetType::New();
  PointSetType::PointType point;

  unsigned int numberOfPoints=10;
  for( unsigned int i=0; i < numberOfPoints; i++ )
    {
    point[0] = i*3;
    point[1] = i*3 + 1;
    point[2] = i*3 + 2;
    pointSet->SetPoint( i, point );
    }

  PointSetToListSampleAdaptorType::Pointer  listSample = PointSetToListSampleAdaptorType::New();

  bool exceptionsProperlyCaught=true;
  //Test if the methods throw exceptions if invoked before setting the pointset
  try
    {
    // Purposely calling the Size() method in order to trigger an exception.
    listSample->Size();
    std::cerr << "Exception should have been thrown since the input point set  \
                  is not set yet" << std::endl;
    exceptionsProperlyCaught=false;
    }
  catch ( itk::ExceptionObject & excp )
    {
    std::cerr << "Caught expected exception: " << excp << std::endl;
    }
  try
    {
    // Purposely calling the GetTotalFrequency() method in order to trigger an exception.
    listSample->GetTotalFrequency();
    std::cerr << "Exception should have been thrown since the input point set  \
                  is not set yet" << std::endl;
    exceptionsProperlyCaught=false;
    }
  catch ( itk::ExceptionObject & excp )
    {
    std::cerr << "Caught expected exception: " << excp << std::endl;
    }

  try
    {
    PointSetToListSampleAdaptorType::MeasurementVectorType m = listSample->GetMeasurementVector( 0 );
    std::cerr << "Exception should have been thrown since the input point set  \
                  is not set yet" << std::endl;
    std::cerr << "The invalid listSample->GetMeasurementVector is: " << m << std::endl;
    exceptionsProperlyCaught=false;
    }
  catch ( itk::ExceptionObject & excp )
    {
    std::cerr << "Caught expected exception: " << excp << std::endl;
    }

  try
    {
    // Purposely calling the GetPointSet() method in order to trigger an exception.
    listSample->GetPointSet();
    std::cerr << "Exception should have been thrown since the input point set  \
                  is not set yet" << std::endl;
    exceptionsProperlyCaught=false;
    }
  catch ( itk::ExceptionObject & excp )
    {
    std::cerr << "Caught expected exception: " << excp << std::endl;
    }

  try
    {
    // Purposely calling the GetFrequency() method in order to trigger an exception.
    listSample->GetFrequency(0 );
    std::cerr << "Exception should have been thrown since the input point set  \
                  is not set yet" << std::endl;
    exceptionsProperlyCaught=false;
    }
  catch ( itk::ExceptionObject & excp )
    {
    std::cerr << "Caught expected exception: " << excp << std::endl;
    }

  if( ! exceptionsProperlyCaught )
    {
    std::cerr << "At least one exception that should have been caught was not." << std::endl;
    return EXIT_FAILURE;
    }


  listSample->SetPointSet( pointSet.GetPointer() );

  //exercise returned pointset
  const PointSetToListSampleAdaptorType::PointSetType * pointSetReturned = listSample->GetPointSet( );

  //check for ITK_NULLPTR
  if( pointSetReturned == ITK_NULLPTR )
    {
    std::cerr << "GetPointSet() returned a ITK_NULLPTR pointer"<< std::endl;
    return EXIT_FAILURE;
    }

  //check size
  if (numberOfPoints != listSample->Size())
    {
    std::cerr << "Size() is not returning the correct size"<< std::endl;
    return EXIT_FAILURE;
    }

  //check frequency
  if ( listSample->GetFrequency( 0 ) != 1 )
    {
    std::cerr << "GetFrequency() is not returning the correct frequency"<< std::endl;
    return EXIT_FAILURE;
    }

  //check frequency
  if (numberOfPoints != listSample->GetTotalFrequency())
    {
    std::cerr << "GetTotalFrequency() is not returning the correct frequency"<< std::endl;
    return EXIT_FAILURE;
    }


  listSample->Print( std::cout );

  for( unsigned int i=0; i < numberOfPoints; i++ )
    {
    PointSetToListSampleAdaptorType::InstanceIdentifier id = i;
    PointSetType::PointType   tempPointSet( 0.0 );
    pointSet->GetPoint( i, &tempPointSet );

    if ( listSample->GetMeasurementVector( id ) != tempPointSet )
      {
      std::cerr << "Error in point set accessed by the adaptor" << std::endl;
      return EXIT_FAILURE;
      }
    }

  //Test the iterators
  std::cerr << "Iterators..." << std::endl;
    {
    // forward iterator
    typedef PointSetToListSampleAdaptorType::Iterator IteratorType;

    IteratorType s_iter = listSample->Begin();

    // copy constructor
    IteratorType bs_iter(s_iter);
    if (bs_iter != s_iter)
      {
      std::cerr << "Iterator::Copy Constructor failed" << std::endl;
      return EXIT_FAILURE;
      }

    // assignment operator
    IteratorType assignment_iter( bs_iter );
    assignment_iter = s_iter;
    if (assignment_iter != s_iter)
      {
      std::cerr << "Iterator::assignment operator failed" << std::endl;
      return EXIT_FAILURE;
      }

    PointSetToListSampleAdaptorType::InstanceIdentifier id = 0;
    while (s_iter != listSample->End())
      {
      if (listSample->GetMeasurementVector(id) !=
          s_iter.GetMeasurementVector())
        {
        std::cerr << "Iterator::GetMeasurementVector (forward) failed"
                  << std::endl;
        return EXIT_FAILURE;
        }
      if (id != s_iter.GetInstanceIdentifier())
        {
        std::cerr << "Iterator::GetInstanceIdentifier (forward) failed"
                  << std::endl;
        return EXIT_FAILURE;
        }
      if (s_iter.GetFrequency() != 1)
        {
        std::cerr << "Iterator::GetFrequency (forward) failed" << std::endl;
        return EXIT_FAILURE;
        }
      if (listSample->GetFrequency(id) != 1)
        {
        std::cerr << "GetFrequency (forward) failed" << std::endl;
        return EXIT_FAILURE;
        }
      ++id;
      ++s_iter;
      }

    if (s_iter != listSample->End())
      {
      std::cerr << "Iterator::End (forward) failed" << std::endl;
      return EXIT_FAILURE;
      }

    }

  std::cerr << "Const Iterators..." << std::endl;
    {
    // forward iterator
    typedef PointSetToListSampleAdaptorType::ConstIterator  ConstIteratorType;

    ConstIteratorType s_iter = listSample->Begin();

    // copy constructor
    ConstIteratorType bs_iter(s_iter);
    if (bs_iter != s_iter)
      {
      std::cerr << "Iterator::Copy Constructor (from const) failed"
                << std::endl;
      return EXIT_FAILURE;
      }

    // assignment operator
    ConstIteratorType assignment_iter( bs_iter );
    assignment_iter = s_iter;
    if (assignment_iter != s_iter)
      {
      std::cerr << "Const Iterator::operator= () failed"
                << std::endl;
      return EXIT_FAILURE;
      }

    // copy from non-const iterator
    PointSetToListSampleAdaptorType::Iterator nonconst_iter = listSample->Begin();
    PointSetToListSampleAdaptorType::ConstIterator s2_iter(nonconst_iter);
    if (s2_iter != s_iter)
      {
      std::cerr << "Iterator::Copy Constructor (from non-const) failed"
                << std::endl;
      return EXIT_FAILURE;
      }

    // assignment from non-const iterator
    s2_iter = nonconst_iter;
    if (s2_iter != s_iter)
      {
      std::cerr << "Iterator::assignment (from non-const) failed" << std::endl;
      return EXIT_FAILURE;
      }

    PointSetToListSampleAdaptorType::InstanceIdentifier id = 0;
    while (s_iter != listSample->End())
      {
      if (listSample->GetMeasurementVector(id) !=
          s_iter.GetMeasurementVector())
        {
        std::cerr << "Iterator::GetMeasurementVector (forward) failed"
                  << std::endl;
        return EXIT_FAILURE;
        }
      if (id != s_iter.GetInstanceIdentifier())
        {
        std::cerr << "Iterator::GetInstanceIdentifier (forward) failed"
                  << std::endl;
        return EXIT_FAILURE;
        }
      if (s_iter.GetFrequency() != 1)
        {
        std::cerr << "Iterator::GetFrequency (forward) failed" << std::endl;
        return EXIT_FAILURE;
        }
      ++id;
      ++s_iter;
      }

    if (s_iter != listSample->End())
      {
      std::cerr << "Iterator::End (forward) failed" << std::endl;
      return EXIT_FAILURE;
      }
    }

  std::cout << "Test passed." << std::endl;
  return EXIT_SUCCESS;
}