/*=========================================================================
 *
 *  Copyright NumFOCUS
 *
 *  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
 *
 *         https://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 "itkImportImageContainer.h"
#include "itkNumericTraits.h"
#include "itkTextOutput.h"

int
itkImportContainerTest(int, char *[])
{
  using PixelType = float;
  using ContainerType = itk::ImportImageContainer<unsigned long, PixelType>;

  itk::OutputWindow::SetInstance(itk::TextOutput::New());

  // First test with ContainerManagesMemory false
  PixelType * ptr1 = nullptr;
  {
    // Test 1: Create an empty container and print it
    auto container1 = ContainerType::New();
    container1->Print(std::cout);
    std::cout << "After New(), size is " << container1->Size() << ", capacity is " << container1->Capacity()
              << " and import pointer is " << container1->GetImportPointer() << std::endl;


    // Test 2: Reserve memory
    container1->Reserve(1000);
    std::cout << "After container1->Reserve(1000), size is " << container1->Size() << ", capacity is "
              << container1->Capacity() << " and import pointer is " << container1->GetImportPointer() << std::endl;

    // Take control of the pointer
    container1->ContainerManageMemoryOff();
    ptr1 = container1->GetImportPointer();

    // Test 3: Reserve a smaller amount of memory
    container1->Reserve(100);
    std::cout << "After container1->Reserve(100), size is " << container1->Size() << ", capacity is "
              << container1->Capacity() << " and import pointer is " << container1->GetImportPointer() << std::endl;


    // Test 4: Squeeze the container
    container1->Squeeze();
    std::cout << "After container1->Squeeze() size is " << container1->Size() << ", capacity is "
              << container1->Capacity() << " and import pointer is " << container1->GetImportPointer() << std::endl;

    // Test 5: Initialize the container
    container1->Initialize();
    std::cout << "After container1->Initialize() size is " << container1->Size() << ", capacity is "
              << container1->Capacity() << " and import pointer is " << container1->GetImportPointer() << std::endl;
  }

  // now repeat the tests with a user provided pointer
  auto * myPtr = new float[2000];
  {
    // Test 1: Create an empty container and print it
    auto container1 = ContainerType::New();
    container1->Print(std::cout);
    std::cout << "After New(), size is " << container1->Size() << ", capacity is " << container1->Capacity()
              << " and import pointer is " << container1->GetImportPointer() << std::endl;

    container1->SetImportPointer(myPtr, 2000);
    std::cout << "After New(), size is " << container1->Size() << ", capacity is " << container1->Capacity()
              << " and import pointer is " << container1->GetImportPointer() << std::endl;

    *(myPtr + 500) = 500.0;

    // Test 2: Reserve less memory than capacity
    container1->Reserve(1000);
    std::cout << "After container1->Reserve(1000), size is " << container1->Size() << ", capacity is "
              << container1->Capacity() << " and import pointer is " << container1->GetImportPointer() << std::endl;

    if (*(myPtr + 500) != 500.0)
    {
      std::cout << "Test failed: After container1->Reserve(1000), container1[500] does != 500." << std::endl;
      return EXIT_FAILURE;
    }

    // Test 3: Reserve more memory than capacity
    container1->Reserve(10000);
    std::cout << "After container1->Reserve(100), size is " << container1->Size() << ", capacity is "
              << container1->Capacity() << " and import pointer is " << container1->GetImportPointer() << std::endl;
    if (*(myPtr + 500) != 500.0)
    {
      std::cout << "Test failed: After container1->Reserve(10000), container1[500] does != 500." << std::endl;
      return EXIT_FAILURE;
    }


    // Test 4: Squeeze the container
    container1->Squeeze();
    std::cout << "After container1->Squeeze() size is " << container1->Size() << ", capacity is "
              << container1->Capacity() << " and import pointer is " << container1->GetImportPointer() << std::endl;

    if (*(myPtr + 500) != 500.0)
    {
      std::cout << "Test failed: After container1->Squeeze(), container1[500] does != 500." << std::endl;
      return EXIT_FAILURE;
    }

    // Test 5: Initialize the container
    container1->Initialize();
    std::cout << "After container1->Initialize() size is " << container1->Size() << ", capacity is "
              << container1->Capacity() << " and import pointer is " << container1->GetImportPointer() << std::endl;
  }

  // Now repeat tests with ContainerManagesMemory true
  {
    // Test 1: Create an empty container and print it
    auto container1 = ContainerType::New();
    container1->Print(std::cout);
    std::cout << "After New(), size is " << container1->Size() << ", capacity is " << container1->Capacity()
              << " and import pointer is " << container1->GetImportPointer() << std::endl;


    // Test 2: Reserve memory
    container1->Reserve(1000);
    std::cout << "After container1->Reserve(1000), size is " << container1->Size() << ", capacity is "
              << container1->Capacity() << " and import pointer is " << container1->GetImportPointer() << std::endl;

    // Test 3: Reserve a smaller amount of memory
    container1->Reserve(100);
    std::cout << "After container1->Reserve(100), size is " << container1->Size() << ", capacity is "
              << container1->Capacity() << " and import pointer is " << container1->GetImportPointer() << std::endl;

    // Test 4: Squeeze the container
    container1->Squeeze();
    std::cout << "After container1->Squeeze() size is " << container1->Size() << ", capacity is "
              << container1->Capacity() << " and import pointer is " << container1->GetImportPointer() << std::endl;

    // Test 5: Initialize the container
    container1->Initialize();
    std::cout << "After container1->Initialize() size is " << container1->Size() << ", capacity is "
              << container1->Capacity() << " and import pointer is " << container1->GetImportPointer() << std::endl;
  }

  // valgrind has problems with exceptions after a failed memory
  // allocation. Since valgrind is normally built with debug, a check
  // for NDEBUG will eliminate this code. Unfortunately, coverage is
  // also built debug, so the coverage report will show that the
  // exception after a refused allocation is not exercised.
#if (defined(NDEBUG))
  // Check the exception on the memory allocation
  bool caughtException = false;
  try
  {
    auto container1 = ContainerType::New();
    container1->Reserve(itk::NumericTraits<unsigned long>::max() / sizeof(PixelType));
  }
  catch (const itk::ExceptionObject & err)
  {
    std::cout << "Caught expected exception: " << err << std::endl;
    caughtException = true;
  }
#endif

  // We must delete the memory we said we would manage
  delete[] ptr1;
  delete[] myPtr;

#if (defined(NDEBUG))
  if (!caughtException && (sizeof(void *) != 8))
  {
    std::cout << "Failed to catch expected exception" << std::endl;
    return EXIT_FAILURE;
  }
#endif
  return EXIT_SUCCESS;
}
