/*=========================================================================
 *
 *  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 <iostream>
#include <fstream>
#include "itkMatlabTransformIOFactory.h"
#include "itkTransformFileWriter.h"
#include "itkTransformFileReader.h"
#include "itkAffineTransform.h"
#include "itkTransformFactory.h"
#include "itkSimilarity2DTransform.h"
#include "itkBSplineTransform.h"
#include "itksys/SystemTools.hxx"

template<typename TParametersValueType>
static int oneTest(const char *goodname,const char *badname)
{
  unsigned int i;
  typedef itk::AffineTransform<TParametersValueType,4>  AffineTransformType;
  typedef itk::AffineTransform<TParametersValueType,10> AffineTransformTypeNotRegistered;
  typename AffineTransformType::Pointer        affine = AffineTransformType::New();
  typename AffineTransformType::InputPointType cor;
  typedef itk::TransformFileWriterTemplate<TParametersValueType> TransformWriterType;
  typedef itk::TransformFileReaderTemplate<TParametersValueType> TransformReaderType;

  itk::ObjectFactoryBase::RegisterFactory(itk::MatlabTransformIOFactory::New() );


  // Set it's parameters
    {
    typename AffineTransformType::ParametersType p = affine->GetParameters();
    for ( i = 0; i < p.GetSize(); i++ )
      {
      p[i] = i;
      }
    affine->SetParameters ( p );
    }
    {
    typename AffineTransformType::FixedParametersType p = affine->GetFixedParameters ();
    for ( i = 0; i < p.GetSize(); i++ )
      {
      p[i] = i;
      }
    affine->SetFixedParameters ( p );
    }
  typename TransformWriterType::Pointer writer = TransformWriterType::New();
  typename TransformReaderType::Pointer reader = TransformReaderType::New();

  //writer->AddTransform(affine);
  writer->SetInput(affine);

  writer->SetFileName( goodname );
  reader->SetFileName( goodname );

  // Testing writing std::cout << "Testing write : ";
  affine->Print ( std::cout );
  try
    {
    writer->Update();
    std::cout << "Writing " << goodname << " to the disk is done." << std::endl;
    std::cout << std::endl;
    std::cout << "Testing read : " << std::endl;
    reader->Update();
    std::cout << goodname << "is read from disk successfully." << std::endl;
    }
  catch( itk::ExceptionObject & excp )
    {
    std::cerr << "Error while saving the transforms" << std::endl;
    std::cerr << excp << std::endl;
    std::cout << "[FAILED]" << std::endl;
    return EXIT_FAILURE;
    }


  try
    {
    const typename TransformReaderType::TransformListType * list = reader->GetTransformList();
    typename TransformReaderType::TransformListType::const_iterator lit = list->begin();
    while ( lit != list->end() )
      {
      (*lit)->Print ( std::cout );
      ++lit;
      }
    }
  catch( itk::ExceptionObject & excp )
    {
    std::cerr << "Error while saving the transforms" << std::endl;
    std::cerr << excp << std::endl;
    std::cout << "[FAILED]" << std::endl;
    return EXIT_FAILURE;
    }


  std::cout << "\n\nCreating bad writer" << std::endl;
  typename AffineTransformTypeNotRegistered::Pointer Bogus = AffineTransformTypeNotRegistered::New();

  // Set it's parameters
    {
    typename AffineTransformType::ParametersType p = Bogus->GetParameters();
    for ( i = 0; i < p.GetSize(); i++ )
      {
      p[i] = i;
      }
    Bogus->SetParameters ( p );
    }
    {
    typename AffineTransformType::FixedParametersType p = Bogus->GetFixedParameters ();
    for ( i = 0; i < p.GetSize(); i++ )
      {
      p[i] = i;
      }
    Bogus->SetFixedParameters ( p );
    }

  typename TransformWriterType::Pointer badwriter = TransformWriterType::New();
  typename TransformReaderType::Pointer badreader = TransformReaderType::New();

  badwriter->AddTransform(Bogus);
  badwriter->SetFileName(badname);

  badreader->SetFileName(badname);

  // Testing writing
  std::cout << "Testing write of non register transform : " << std::endl;
  std::cout << std::flush;
  try
    {
    badwriter->Update();
    }
  catch( itk::ExceptionObject & excp )
    {
    std::cerr << "Error while saving the transforms" << std::endl;
    std::cerr << excp << std::endl;
    std::cout << "[FAILED]" << std::endl;
    return EXIT_FAILURE;
    }

  // Testing writing
  std::cout << "Testing read of non register transform : " << std::endl;
  std::cout << std::flush;
  bool caught = false;
  try
    {
    badreader->Update();
    }
  catch( itk::ExceptionObject & excp )
    {
    caught = true;
    std::cout << "Caught exception as expected" << std::endl;
    std::cout << excp << std::endl;
    }
  if ( !caught )
    {
    std::cerr << "Did not catch non registered transform" << std::endl;
    std::cout << "[FAILED]" << std::endl;
    return EXIT_FAILURE;
    }
  std::cout << "[PASSED]" << std::endl;

  return EXIT_SUCCESS;
}

//
// test endless loop bug in transform reader, triggered by no
// EOL at end of file.
// This test will exercise this reported bug:
// http://public.kitware.com/Bug/view.php?id=7028
template<typename TParametersValueType>
int secondTest()
{
  std::filebuf fb;
  fb.open("IllegalTransform.txt",std::ios::out);
  std::ostream os(&fb);
  os << "#Insight Transform File V1.0"
     << std::endl
     << "#Transform 0"
     << std::endl
     << "Transform: AffineTransform_double_10_10"
     << std::endl
     << "Parameters: "
     << "  0 1 2 3 4 5 6 7 8 9 10 11 12"
     << " 13 14 15 16 17 18 19 20 21 22"
     << std::endl
     << "FixedParameters: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18";
  fb.close();

  typedef itk::TransformFileReaderTemplate<TParametersValueType> TransformReaderType;
  typename TransformReaderType::Pointer reader = TransformReaderType::New();
  reader->SetFileName("IllegalTransform.txt");
  try
    {
    reader->Update();
    std::cerr << "FAILED to throw expected exception" << std::endl;
    const typename TransformReaderType::TransformListType * list = reader->GetTransformList();
    typename TransformReaderType::TransformListType::const_iterator lit =
      list->begin();
    while ( lit != list->end() )
      {
      (*lit)->Print ( std::cout );
      ++lit;
      }
    }
  catch( itk::ExceptionObject & excp )
    {
    std::cerr << "EXPECTED Error while reading the transforms" << std::endl;
    std::cerr << excp << std::endl;
    std::cout << "[SUCCESS]" << std::endl;
    return EXIT_SUCCESS;
    }
  return EXIT_FAILURE;
}

//
// test reading a dummy file -- should not crash
template<typename TParametersValueType>
int thirdTest()
{
  std::filebuf fb;
  fb.open("IllegalMat.mat",std::ios::out);
  std::ostream os(&fb);
  os << "Baz, Bar" << std::endl;
  fb.close();

  typedef itk::TransformFileReaderTemplate<TParametersValueType> TransformReaderType;
  typename TransformReaderType::Pointer reader = TransformReaderType::New();
  reader->SetFileName("IllegalMat.Mat");
  try
    {
    reader->Update();
    std::cerr << "FAILED to throw expected exception" << std::endl;
    }
  catch( itk::ExceptionObject & excp )
    {
    std::cerr << "EXPECTED Error while reading the transforms" << std::endl;
    std::cerr << excp << std::endl;
    std::cout << "[SUCCESS]" << std::endl;
    return EXIT_SUCCESS;
    }
  return EXIT_FAILURE;
}


int itkIOTransformMatlabTest(int argc, char* argv[])
{
  if (argc > 1)
    {
    itksys::SystemTools::ChangeDirectory(argv[1]);
    }

  int result1 =  oneTest<float>("Transforms_float.mat", "TransformsBad_float.mat" );
  int result2 =  secondTest<float>();

  int result3 =  oneTest<double>("Transforms_double.mat", "TransformsBad_double.mat" );
  int result4 =  secondTest<double>();

  int result5 = thirdTest<double>();

  return (
          ( !( result1 == EXIT_SUCCESS && result2 == EXIT_SUCCESS) ) &&
          ( !( result3 == EXIT_SUCCESS && result4 == EXIT_SUCCESS) ) &&
          ( !( result5 == EXIT_SUCCESS) )
         );
}