/*=========================================================================
 *
 *  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 "itkIOCommon.h"
#include <cstring>
#include "itksys/SystemTools.hxx"

bool
CheckFileNameParsing(const std::string & fileName,
                     const std::string & correctNameOnly,
                     const std::string & correctExtension,
                     const std::string & correctPath)
{
  // the current kwsys way...
  std::cout << "(kwsys) Extracting...file name...";
  char * nameOnly = nullptr;
  {
    const std::string fileNameString =
      itksys::SystemTools::GetFilenameWithoutLastExtension(itksys::SystemTools::GetFilenameName(fileName));
    nameOnly = new char[fileNameString.size() + 1];
    std::strncpy(nameOnly, fileNameString.c_str(), fileNameString.size() + 1);
  }

  std::cout << "extension...";
  char * extension = nullptr;
  {
    const std::string extensionString = itksys::SystemTools::GetFilenameLastExtension(fileName);
    // NB: remove the period (kwsys leaves it on, ITK precedent was to
    // remove it)
    extension = new char[extensionString.size() + 1];
    if (!extensionString.empty())
    {
      std::strncpy(extension, extensionString.c_str() + 1, extensionString.size() + 1);
    }
    else
    {
      extension[0] = '\0';
    }
  }

  std::cout << "path...";
  char * path = nullptr;
  {
    std::string pathString = itksys::SystemTools::GetFilenamePath(fileName);
#ifdef _WIN32
    for (size_t i = 0; i < pathString.size(); ++i)
    {
      if (pathString[i] == '/')
      {
        pathString[i] = '\\';
      }
    }
#endif
    // NB: add trailing slash iff the result is non-empty (kwsys always
    // removes it, ITK precedent was to keep it)
    if (pathString.size() > 1)
    {
#if defined(_WIN32)
      pathString = pathString + "\\";
#else
      pathString = pathString + "/";
#endif
    }
    path = new char[pathString.size() + 1];
    std::strncpy(path, pathString.c_str(), pathString.size() + 1);
  }

  std::cout << "DONE" << std::endl;

  std::cout << "Comparing...file name...";
  bool nameMatches = false;
  if (strlen(nameOnly) == 0)
  {
    nameMatches = correctNameOnly.empty();
  }
  else
  {
    nameMatches = correctNameOnly.compare(nameOnly) == 0;
  }

  std::cout << "extension...";
  bool extensionMatches = false;
  if (strlen(extension) == 0)
  {
    extensionMatches = correctExtension.empty();
  }
  else
  {
    extensionMatches = correctExtension.compare(extension) == 0;
  }

  std::cout << "path...";
  bool pathMatches = false;
  if (strlen(path) == 0)
  {
    pathMatches = correctPath.empty();
  }
  else
  {
    pathMatches = correctPath.compare(path) == 0;
  }
  std::cout << "DONE" << std::endl;

  std::cout << "FullFileName: \"" << fileName << '"' << std::endl;
  std::cout << "FileName: (expected) \"" << correctNameOnly << "\" (actual) \"" << static_cast<const char *>(nameOnly)
            << '"' << " (correct) " << nameMatches << std::endl;
  std::cout << "Extension: (expected) \"" << correctExtension << "\" (actual) \""
            << static_cast<const char *>(extension) << '"' << " (correct) " << extensionMatches << std::endl;
  std::cout << "Path: (expected) \"" << correctPath << "\" (actual) \"" << static_cast<const char *>(path) << '"'
            << " (correct) " << pathMatches << std::endl;

  const bool correctParse = nameMatches && extensionMatches && pathMatches;
  std::cout << "Parsing is " << (correctParse ? "correct" : "incorrect") << std::endl;

  // clean up
  std::cout << "Cleaning up...";
  delete[] nameOnly;
  delete[] extension;
  delete[] path;
  std::cout << "DONE" << std::endl;

  return correctParse;
}

int
itkIOCommonTest(int, char *[])
{
  bool success = true;

  //
  // reasonable cases
  //

#if defined(_WIN32)
  success = success && CheckFileNameParsing("c:\\dir1\\dir2\\myfile.tar.gz", "myfile.tar", "gz", "c:\\dir1\\dir2\\");
  success =
    success && CheckFileNameParsing(
                 "\\\\sambaserver\\dir1\\dir2\\myfile.tar.gz", "myfile.tar", "gz", "\\\\sambaserver\\dir1\\dir2\\");
#else
  success = success && CheckFileNameParsing("/dir1/dir2/myfile.tar.gz", "myfile.tar", "gz", "/dir1/dir2/");
#endif

  //
  // less reasonable cases
  //
  success = success && CheckFileNameParsing(".", "", "", "");

#if defined(_WIN32)
  success = success && CheckFileNameParsing("\\", "", "", "\\");
  success = success && CheckFileNameParsing("\\.tar.gz", ".tar", "gz", "\\");
#else
  success = success && CheckFileNameParsing("/", "", "", "/");
  success = success && CheckFileNameParsing("/.tar.gz", ".tar", "gz", "/");
#endif

#if defined(_WIN32)
  success = success && CheckFileNameParsing("\\.tar.gz", ".tar", "gz", "\\");
#endif

  success = success && CheckFileNameParsing(".tar.gz", ".tar", "gz", "");

  success = success && CheckFileNameParsing("myfile", "myfile", "", "");

#if defined(_WIN32)
  success = success && CheckFileNameParsing("\\myfile", "myfile", "", "\\");
#else
  success = success && CheckFileNameParsing("/myfile", "myfile", "", "/");
#endif

  success = success && CheckFileNameParsing("", "", "", "");

  // Test streaming enumeration for IOCommonEnums::AtomicPixel elements
  const std::set<itk::IOCommonEnums::AtomicPixel> allAtomicPixel{
    itk::IOCommonEnums::AtomicPixel::ITK_UCHAR,  itk::IOCommonEnums::AtomicPixel::ITK_CHAR,
    itk::IOCommonEnums::AtomicPixel::ITK_USHORT, itk::IOCommonEnums::AtomicPixel::ITK_SHORT,
    itk::IOCommonEnums::AtomicPixel::ITK_UINT,   itk::IOCommonEnums::AtomicPixel::ITK_INT,
    itk::IOCommonEnums::AtomicPixel::ITK_ULONG,  itk::IOCommonEnums::AtomicPixel::ITK_LONG,
    itk::IOCommonEnums::AtomicPixel::ITK_FLOAT,  itk::IOCommonEnums::AtomicPixel::ITK_DOUBLE
  };
  for (const auto & ee : allAtomicPixel)
  {
    std::cout << "STREAMED ENUM VALUE IOCommonEnums::AtomicPixel: " << ee << std::endl;
  }

  return success ? EXIT_SUCCESS : EXIT_FAILURE;
}
