/**
 * @file      CommandLineParameters.cpp
 *
 * @author    Jiri Jaros \n
 *            Faculty of Information Technology \n
 *            Brno University of Technology \n
 *            jarosjir@fit.vutbr.cz
 *
 * @brief     The implementation file containing the command line parameters.
 *
 * @version   kspaceFirstOrder3D 2.16
 *
 * @date      29 August    2012, 11:25 (created) \n
 *            04 September 2017, 11:10 (revised)
 *
 * @copyright Copyright (C) 2017 Jiri Jaros and Bradley Treeby.
 *
 * This file is part of the C++ extension of the [k-Wave Toolbox](http://www.k-wave.org).
 *
 * This file is part of the k-Wave. k-Wave is free software: you can redistribute it and/or modify it under the terms
 * of the GNU Lesser General Public License as published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * k-Wave is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for
 * more details.
 *
 * You should have received a copy of the GNU Lesser General Public License along with k-Wave.
 * If not, see [http://www.gnu.org/licenses/](http://www.gnu.org/licenses/).
 */


//Linux build
#ifdef __linux__
  #include <getopt.h>
#endif

//Windows build
#ifdef _WIN64
  #include <GetoptWin64/Getopt.h>
#endif

#include <cstring>
#ifdef _OPENMP
  #include <omp.h>
#endif

#include <stdexcept>

#include <Parameters/CommandLineParameters.h>
#include <Logger/Logger.h>

using std::string;
//--------------------------------------------------------------------------------------------------------------------//
//---------------------------------------------------- Constants -----------------------------------------------------//
//--------------------------------------------------------------------------------------------------------------------//



//--------------------------------------------------------------------------------------------------------------------//
//------------------------------------------------- Public methods ---------------------------------------------------//
//--------------------------------------------------------------------------------------------------------------------//

/**
 * Print usage and exit.
 */
void CommandLineParameters::printUsage()
{
  Logger::log(Logger::LogLevel::kBasic, kOutFmtUsagePart1);

  #ifdef _OPENMP
    Logger::log(Logger::LogLevel::kBasic, kOutFmtUsageThreads, omp_get_num_procs());
  #endif

  Logger::log(Logger::LogLevel::kBasic, kOutFmtUsagePart2, kDefaultProgressPrintInterval, kDefaultCompressionLevel);
}// end of printUsage
//----------------------------------------------------------------------------------------------------------------------

/**
 * Print out commandline parameters.
 */
void CommandLineParameters::printComandlineParamers()
{
  Logger::log(Logger::LogLevel::kAdvanced, kOutFmtSeparator);

  Logger::log(Logger::LogLevel::kAdvanced,
              Logger::wordWrapString(kOutFmtInputFile + mInputFileName, kErrFmtPathDelimiters, 15).c_str());

  Logger::log(Logger::LogLevel::kAdvanced,
              Logger::wordWrapString(kOutFmtOutputFile + mOutputFileName,kErrFmtPathDelimiters, 15).c_str());

  if (isCheckpointEnabled())
  {
    Logger::log(Logger::LogLevel::kAdvanced,
                Logger::wordWrapString(kOutFmtCheckpointFile + mCheckpointFileName,kErrFmtPathDelimiters, 15).c_str());

    Logger::log(Logger::LogLevel::kAdvanced, kOutFmtSeparator);

    Logger::log(Logger::LogLevel::kAdvanced, kOutFmtCheckpointInterval, mCheckpointInterval);
  }
  else
  {
    Logger::log(Logger::LogLevel::kAdvanced, kOutFmtSeparator);
  }


  Logger::log(Logger::LogLevel::kAdvanced, kOutFmtCompressionLevel, mCompressionLevel);

  Logger::log(Logger::LogLevel::kFull,     kOutFmtPrintProgressIntrerval, mProgressPrintInterval);

  if (mBenchmarkFlag)
  {
    Logger::log(Logger::LogLevel::kFull, kOutFmtBenchmarkTimeStep, mBenchmarkTimeStepCount);
  }

  Logger::log(Logger::LogLevel::kAdvanced, kOutFmtSamplingFlags);


  string sampledQuantitiesList = "";
  // Sampled p quantities

  if (mStorePressureRawFlag)
  {
    sampledQuantitiesList += "p_raw, ";
  }
  if (mStorePressureRmsFlag)
  {
    sampledQuantitiesList += "p_rms, ";
  }
  if (mStorePressureMaxFlag)
  {
    sampledQuantitiesList += "p_max, ";
  }
  if (mStorePressureMinFlag)
  {
    sampledQuantitiesList += "p_min, ";
  }
  if (mStorePressureMaxAllFlag)
  {
    sampledQuantitiesList += "p_max_all, ";
  }
  if (mStorePressureMinAllFlag)
  {
    sampledQuantitiesList += "p_min_all, ";
  }
  if (mStorePressureFinalAllFlag)
  {
    sampledQuantitiesList += "p_final, ";
  }

  // Sampled u quantities
  if (mStoreVelocityRawFlag)
  {
    sampledQuantitiesList += "u_raw, ";
  }
  if (mStoreVelocityRmsFlag)
  {
    sampledQuantitiesList += "u_rms, ";
  }
  if (mStoreVelocityMaxFlag)
  {
    sampledQuantitiesList += "u_max, ";
  }
  if (mStoreVelocityMinFlag)
  {
    sampledQuantitiesList += "u_min, ";
  }
  if (mStoreVelocityMaxAllFlag)
  {
    sampledQuantitiesList += "u_max_all, ";
  }
  if (mStoreVelocityMinAllFlag)
  {
    sampledQuantitiesList += "u_min_all, ";
  }
  if (mStoreVelocityFinalAllFlag)
  {
    sampledQuantitiesList += "u_final, ";
  }

  if (mStoreVelocityNonStaggeredRawFlag)
  {
    sampledQuantitiesList += "u_non_staggered_raw, ";
  }

  // remove comma and space symbols
  if (sampledQuantitiesList.length() > 0)
  {
    sampledQuantitiesList.pop_back();
    sampledQuantitiesList.pop_back();
  }

  Logger::log(Logger::LogLevel::kAdvanced,
              Logger::wordWrapString(sampledQuantitiesList," ", 2).c_str());

  Logger::log(Logger::LogLevel::kAdvanced, kOutFmtSeparator);

  Logger::log(Logger::LogLevel::kAdvanced, kOutFmtSamplingStartsAt, mSamplingStartTimeStep + 1);

  if (mCopySensorMaskFlag)
  {
    Logger::log(Logger::LogLevel::kAdvanced, kOutFmtCopySensorMask);
  }
}// end of  printComandlineParamers
//----------------------------------------------------------------------------------------------------------------------

/**
 * Parse command line.
 */
void CommandLineParameters::parseCommandLine(int argc, char** argv)
{
  char c;
  int  longIndex = -1;
  bool checkpointFlag = false;

  constexpr int errorLineIndent = 9;

  // all optional arguments are in fact requested. This was chosen to prevent
  // getopt error messages and provide custom error handling.
  #ifdef _OPENMP
    const char* shortOpts = "i:o:r:c:t:puhs:";
  #else
    const char* shortOpts = "i:o:r:c:puhs:";
  #endif

  const struct option longOpts[] =
  {
    { "benchmark",            required_argument, nullptr, 1 },
    { "copy_sensor_mask",     no_argument,       nullptr, 2 },
    { "checkpoint_file"    ,  required_argument, nullptr, 3 },
    { "checkpoint_interval",  required_argument, nullptr, 4 },
    { "help",                 no_argument,       nullptr,'h'},
    { "verbose",              required_argument, nullptr, 5 },
    { "version",              no_argument,       nullptr, 6 },

    { "p_raw",                no_argument, nullptr,'p' },
    { "p_rms",                no_argument, nullptr, 10 },
    { "p_max",                no_argument, nullptr, 11 },
    { "p_min",                no_argument, nullptr, 12 },
    { "p_max_all",            no_argument, nullptr, 13 },
    { "p_min_all",            no_argument, nullptr, 14 },
    { "p_final",              no_argument, nullptr, 15 },

    { "u_raw",                no_argument, nullptr,'u' },
    { "u_rms",                no_argument, nullptr, 20},
    { "u_max",                no_argument, nullptr, 21},
    { "u_min",                no_argument, nullptr, 22},
    { "u_max_all",            no_argument, nullptr, 23},
    { "u_min_all",            no_argument, nullptr, 24},
    { "u_final",              no_argument, nullptr, 25},
    { "u_non_staggered_raw",  no_argument, nullptr, 26},

    { nullptr,                no_argument, nullptr, 0}
  };

  // all optional arguments are in fact requested. This was chosen to prevent
  // getopt error messages and provide custom error handling.
  opterr = 0;

  // Short parameters //
  while ((c = getopt_long (argc, argv, shortOpts, longOpts, &longIndex )) != -1)
  {
    switch (c)
    {
      case 'i':
      {
        // test if the wile was correctly entered (if not, getopt could eat
        // the following parameter)
        if ((optarg != nullptr) &&
            ((strlen(optarg) > 0) && (optarg[0] != '-')))
        {
          mInputFileName = optarg;
        }
        else
        {
          printUsage();
          Logger::errorAndTerminate(Logger::wordWrapString(kErrFmtNoInputFile, " ", errorLineIndent));
        }
        break;
      }

      case 'o':
      {
        // test if the wile was correctly entered (if not, getopt could eat
        // the following parameter)
        if ((optarg != nullptr) &&
            ((strlen(optarg) > 0) && (optarg[0] != '-')))
        {
          mOutputFileName = optarg;
        }
        else
        {
          printUsage();
          Logger::errorAndTerminate(Logger::wordWrapString(kErrFmtNoOutputFile, " ", errorLineIndent));
        }
        break;
      }

      case 'r':
      {
        try
        {
          int convertedValue = std::stoi(optarg);
          if ((convertedValue  < 1) || (convertedValue  > 100))
          {
            throw std::invalid_argument("-r");
          }
          mProgressPrintInterval = std::stoll(optarg);
        }
        catch (...)
        {
          printUsage();
          Logger::errorAndTerminate(Logger::wordWrapString(kErrFmtNoProgressPrintInterval, " ", errorLineIndent));
        }
        break;
      }

  #ifdef _OPENMP
      case 't':
      {
        try
        {
          if (std::stoi(optarg) < 1)
          {
            throw std::invalid_argument("-t");
          }
          mNumberOfThreads = std::stoll(optarg);
        }
        catch (...)
        {
          printUsage();
          Logger::errorAndTerminate(Logger::wordWrapString(kErrFmtInvalidNumberOfThreads, " ", errorLineIndent));
        }
        break;
      }
  #endif

      case 'c':
      {
        try
        {
          int covertedValue = std::stoi(optarg);
          if ((covertedValue < 0) || (covertedValue > 9))
          {
            throw std::invalid_argument("-c");
          }
          mCompressionLevel = std::stoll(optarg);
        }
        catch (...)
        {
          printUsage();
          Logger::errorAndTerminate(Logger::wordWrapString(kErrFmtNoCompressionLevel, " ", errorLineIndent));
        }
        break;
      }

      case 'h':
      {
        printUsage();
        exit(EXIT_SUCCESS);
      }

      case 's':
      {
        try
        {
          if (std::stoll(optarg) < 1)
          {
            throw std::invalid_argument("-s");
          }
          mSamplingStartTimeStep = std::stoll(optarg) - 1;
        }
        catch (...)
        {
          printUsage();
          Logger::errorAndTerminate(Logger::wordWrapString(kErrFmtNoSamplingStartTimeStep, " ", errorLineIndent));
        }
        break;
      }

      case 1: // benchmark
      {
        try
        {
          mBenchmarkFlag = true;
          if (std::stoll(optarg) <= 0)
          {
            throw std::invalid_argument("benchmark");
          }
          mBenchmarkTimeStepCount = std::stoll(optarg);
        }
        catch (...)
        {
          printUsage();
          Logger::errorAndTerminate(Logger::wordWrapString(kErrFmtNoBenchmarkTimeStep, " ", errorLineIndent));
        }
        break;
      }

      case 2: // copy_sensor_mask
      {
        mCopySensorMaskFlag = true;
        break;
      }

      case 3: // checkpoint_file
      {
        checkpointFlag = true;
        // test if the wile was correctly entered (if not, getopt could eat
        // the following parameter)
        if ((optarg != NULL) &&
            ((strlen(optarg) > 0) && (optarg[0] != '-')))
        {
          mCheckpointFileName = optarg;
        }
        else
        {
          printUsage();
          Logger::errorAndTerminate(Logger::wordWrapString(kErrFmtNoCheckpointFile, " ", errorLineIndent));
        }
        break;
      }

      case 4: // checkpoint_interval
      {
        try
        {
          checkpointFlag = true;
          if (std::stoll(optarg) <= 0)
          {
           throw std::invalid_argument("checkpoint_interval");
          }
          mCheckpointInterval = std::stoll(optarg);
        }
        catch (...)
        {
          printUsage();
          Logger::errorAndTerminate(Logger::wordWrapString(kErrFmtNoCheckpointInterval, " ", errorLineIndent));
        }
        break;
      }

      case 5: // verbose
      {
        try
        {
          int verboseLevel = std::stoi(optarg);
          if ((verboseLevel < 0) || (verboseLevel > 2))
          {
            throw std::invalid_argument("verbose");
          }
          Logger::setLevel(static_cast<Logger::LogLevel> (verboseLevel));
        }
        catch (...)
        {
          printUsage();
          Logger::errorAndTerminate(Logger::wordWrapString(kErrFmtNoVerboseLevel, " ", errorLineIndent));
        }
        break;
      }

      case 6: // version
      {
        mPrintVersionFlag = true;
        break;
      }

      case 'p':
      {
        mStorePressureRawFlag = true;
        break;
      }

      case 10: // p_rms
      {
        mStorePressureRmsFlag = true;
        break;
      }

      case 11: // p_max
      {
        mStorePressureMaxFlag = true;
        break;
      }

      case 12: // p_min
      {
        mStorePressureMinFlag = true;
        break;
      }

      case 13: // p_max_all
      {
        mStorePressureMaxAllFlag = true;
        break;
      }

      case 14: // p_min_all
      {
        mStorePressureMinAllFlag = true;
        break;
      }

      case 15: // p_final
      {
        mStorePressureFinalAllFlag = true;
        break;
      }

      case 'u':
      {
        mStoreVelocityRawFlag = true;
        break;
      }

      case 20: // u_rms
      {
        mStoreVelocityRmsFlag = true;
        break;
      }

      case 21: // u_max
      {
        mStoreVelocityMaxFlag = true;
        break;
      }

      case 22: // u_min
      {
        mStoreVelocityMinFlag = true;
        break;
      }

      case 23: // u_max_all
      {
        mStoreVelocityMaxAllFlag = true;
        break;
      }

      case 24: // u_min_all
      {
        mStoreVelocityMinAllFlag = true;
        break;
      }

      case 25: // u_final
      {
        mStoreVelocityFinalAllFlag = true;
        break;
      }

      case 26: // u_non_staggered_raw
      {
        mStoreVelocityNonStaggeredRawFlag = true;
        break;
      }

      // unknown parameter or a missing mandatory argument
      case ':':
      case '?':
      {
        switch (optopt)
        {
          case 'i':
          {
            printUsage();
            Logger::errorAndTerminate(Logger::wordWrapString(kErrFmtNoInputFile, " ", errorLineIndent));
            break;
          }
          case 'o':
          {
            printUsage();
            Logger::errorAndTerminate(Logger::wordWrapString(kErrFmtNoOutputFile, " ", errorLineIndent));
            break;
          }

          case 'r':
          {
            printUsage();
            Logger::errorAndTerminate(Logger::wordWrapString(kErrFmtNoProgressPrintInterval, " ", errorLineIndent));
            break;
          }

          case 'c':
          {
            printUsage();
            Logger::errorAndTerminate(Logger::wordWrapString(kErrFmtNoCompressionLevel, " ", errorLineIndent));
            break;
          }

        #ifdef _OPENMP
          case 't':
          {
            printUsage();
            Logger::errorAndTerminate(Logger::wordWrapString(kErrFmtInvalidNumberOfThreads, " ", errorLineIndent));
            break;
          }
        #endif

          case 's':
          {
            printUsage();
            Logger::errorAndTerminate(Logger::wordWrapString(kErrFmtNoSamplingStartTimeStep, " ", errorLineIndent));
            break;
          }

          case 1: // benchmark
          {
            printUsage();
            Logger::errorAndTerminate(Logger::wordWrapString(kErrFmtNoBenchmarkTimeStep, " ", errorLineIndent));
            break;
          }

          case 3: // checkpoint_file
          {
            printUsage();
            Logger::errorAndTerminate(Logger::wordWrapString(kErrFmtNoCheckpointFile, " ", errorLineIndent));
            break;
          }

          case 4: // checkpoint_interval
          {
            printUsage();
            Logger::errorAndTerminate(Logger::wordWrapString(kErrFmtNoCheckpointInterval," ", errorLineIndent));
            break;
          }

          case 5: // verbose
          {
            printUsage();
            Logger::errorAndTerminate(Logger::wordWrapString(kErrFmtNoVerboseLevel, " ", errorLineIndent));
            break;
          }

          default :
          {
            printUsage();
            Logger::errorAndTerminate(Logger::wordWrapString(kErrFmtUnknownParameterOrArgument, " ", errorLineIndent));
            break;
          }
        }
      }

      default:
      {
        printUsage();
        Logger::errorAndTerminate(Logger::wordWrapString(kErrFmtUnknownParameter, " ", errorLineIndent));
        break;
      }
    }
  }

  if (mPrintVersionFlag) return;

  //-- Post checks --//
  if (mInputFileName == "")
  {
    printUsage();
    Logger::errorAndTerminate(Logger::wordWrapString(kErrFmtNoInputFile, " ", errorLineIndent));
  }

  if (mOutputFileName == "")
  {
    printUsage();
    Logger::errorAndTerminate(Logger::wordWrapString(kErrFmtNoOutputFile, " ", errorLineIndent));
  }

  if (checkpointFlag)
  {
    if (mCheckpointFileName == "")
    {
      printUsage();
      Logger::errorAndTerminate(Logger::wordWrapString(kErrFmtNoCheckpointFile, " ", errorLineIndent));
    }

    if (mCheckpointInterval <= 0)
    {
      printUsage();
      Logger::errorAndTerminate(Logger::wordWrapString(kErrFmtNoCheckpointInterval, " ", errorLineIndent));
    }
  }

  // set a default flag if necessary
  if (!(mStorePressureRawFlag    || mStorePressureRmsFlag    || mStorePressureMaxFlag      || mStorePressureMinFlag ||
        mStorePressureMaxAllFlag || mStorePressureMinAllFlag || mStorePressureFinalAllFlag ||
        mStoreVelocityRawFlag    || mStoreVelocityNonStaggeredRawFlag                      ||
        mStoreVelocityRmsFlag    || mStoreVelocityMaxFlag    || mStoreVelocityMinFlag      ||
        mStoreVelocityMaxAllFlag || mStoreVelocityMinAllFlag || mStoreVelocityFinalAllFlag ))
  {
    mStorePressureRawFlag = true;
  }
}// end of parseCommandLine
//----------------------------------------------------------------------------------------------------------------------

//--------------------------------------------------------------------------------------------------------------------//
//------------------------------------------------ Protected methods -------------------------------------------------//
//--------------------------------------------------------------------------------------------------------------------//

/**
 * Constructor.
 */
CommandLineParameters::CommandLineParameters() :
        mInputFileName(""), mOutputFileName (""), mCheckpointFileName(""),
        #ifdef _OPENMP
          mNumberOfThreads(omp_get_num_procs()),
        #else
          mNumberOfThreads(1),
        #endif

        mProgressPrintInterval(kDefaultProgressPrintInterval),
        mCompressionLevel (kDefaultCompressionLevel),
        mBenchmarkFlag (false), mBenchmarkTimeStepCount(0),
        mCheckpointInterval(0),
        mPrintVersionFlag (false),
        // output flags
        mStorePressureRawFlag(false), mStorePressureRmsFlag(false),
        mStorePressureMaxFlag(false), mStorePressureMinFlag(false),
        mStorePressureMaxAllFlag(false), mStorePressureMinAllFlag(false), mStorePressureFinalAllFlag(false),
        mStoreVelocityRawFlag(false), mStoreVelocityNonStaggeredRawFlag(false),
        mStoreVelocityRmsFlag(false), mStoreVelocityMaxFlag(false), mStoreVelocityMinFlag(false),
        mStoreVelocityMaxAllFlag(false), mStoreVelocityMinAllFlag(false), mStoreVelocityFinalAllFlag(false),
        mCopySensorMaskFlag(false),
        mSamplingStartTimeStep(0)
{

}// end of constructor
//----------------------------------------------------------------------------------------------------------------------
