/*============================================================================
  MetaIO
  Copyright 2000-2010 Insight Software Consortium

  Distributed under the OSI-approved BSD License (the "License");
  see accompanying file Copyright.txt for details.

  This software is distributed WITHOUT ANY WARRANTY; without even the
  implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  See the License for more information.
============================================================================*/
/**
 *    MetaUtils (.h and .cpp)
 *
 * Description:
 *    This file provides generic ascii file parsing capabilities.
 *    It assumes that the files consist of a set of fields
 *    Each field is list of variable = value pairs
 *
 * Features:
 *    There can be dependencies between fields, required fields,
 *       and optional fields.
 *    Undefined fields are skipped.
 *    Values must conform to expected types.   There can be default
 *       values for fields.
 *
 * Author:
 *    Stephen R. Aylward
 *
 * Date:
 *    February 22, 2002
 *
 **/
#include "metaTypes.h"

#ifndef ITKMetaIO_METAUTILS_H
#  define ITKMetaIO_METAUTILS_H

#  ifdef _MSC_VER
#    pragma warning(disable : 4251)
#    pragma warning(disable : 4511)
#    pragma warning(disable : 4512)
#    pragma warning(disable : 4284)
#    pragma warning(disable : 4702)
#    pragma warning(disable : 4786)
#    pragma warning(disable : 4996)
#  endif

#  include <vector>
#  include <string>
#  include <sstream>
#  include <iostream>
//#include <iomanip>
#  include <typeinfo>
#  include <cstring>

#  if (METAIO_USE_NAMESPACE)
namespace METAIO_NAMESPACE
{
#  endif

extern bool META_DEBUG;

#  define META_DEBUG_PRINT(content)                                                                                  \
      if (META_DEBUG)                                                                                                \
        {                                                                                                            \
        std::cout << content << std::endl;                                                                           \
        }                                                                                                            \
    static_assert(true, "Compiled away assert that syntactically require semicolon at end of macro.")

// Types used for storing the compression table
typedef struct MET_CompressionOffset
{
  std::streamoff uncompressedOffset;
  std::streamoff compressedOffset;
} MET_CompressionOffsetType;

typedef std::vector<MET_CompressionOffsetType> MET_CompressionOffsetListType;

typedef struct MET_CompressionTable
{
  MET_CompressionOffsetListType offsetList;
  z_stream *                    compressedStream;
  char *                        buffer;
  std::streamoff                bufferSize;
} MET_CompressionTableType;

METAIO_EXPORT MET_FieldRecordType *
              MET_GetFieldRecord(const char * _fieldName, std::vector<MET_FieldRecordType *> * _fields);

METAIO_EXPORT
int
MET_GetFieldRecordNumber(const char * _fieldName, std::vector<MET_FieldRecordType *> * _fields);

METAIO_EXPORT
bool
MET_SizeOfType(MET_ValueEnumType _vType, int * s);

// Byte Order
METAIO_EXPORT
bool
MET_SystemByteOrderMSB();

inline unsigned short
MET_ByteOrderSwapShort(unsigned short x)
{
  return x << 8 | x >> 8;
}

inline unsigned int
MET_ByteOrderSwapLong(unsigned int x)
{
  return (((x << 24) & 0xff000000) | ((x << 8) & 0x00ff0000) | ((x >> 8) & 0x0000ff00) | ((x >> 24) & 0x000000ff));
}

inline void
MET_ByteOrderSwap2(void * x)
{
  char   one_byte;
  char * p = reinterpret_cast<char *>(x);

  one_byte = p[0];
  p[0] = p[1];
  p[1] = one_byte;
}

inline void
MET_ByteOrderSwap4(void * x)
{
  char   one_byte;
  char * p = reinterpret_cast<char *>(x);

  one_byte = p[0];
  p[0] = p[3];
  p[3] = one_byte;

  one_byte = p[1];
  p[1] = p[2];
  p[2] = one_byte;
}

inline void
MET_ByteOrderSwap8(void * x)
{
  char   one_byte;
  char * p = reinterpret_cast<char *>(x);
  one_byte = p[0];
  p[0] = p[7];
  p[7] = one_byte;

  one_byte = p[1];
  p[1] = p[6];
  p[6] = one_byte;

  one_byte = p[2];
  p[2] = p[5];
  p[5] = one_byte;

  one_byte = p[3];
  p[3] = p[4];
  p[4] = one_byte;
}

/** Make sure that all the byte are read and written as LSB */
void
MET_SwapByteIfSystemMSB(void * val, MET_ValueEnumType _type);


// STRINGS AND TYPES
METAIO_EXPORT
bool
MET_StringToWordArray(const char * s, int * n, char *** val);

template <class T>
void
MET_StringToVector(const std::string & s, std::vector<T> & vec, const char separator = ',')
{
  vec.clear();

  std::string::size_type prevPos = 0;
  std::string::size_type pos = s.find(separator, prevPos);
  T                      tVal;
  while (pos != std::string::npos)
  {
    std::stringstream ss;
    std::string       tmpString = s.substr(prevPos, (pos - prevPos));
    ss << tmpString;
    ss >> tVal;
    vec.push_back(tVal);

    prevPos = pos + 1;
    pos = s.find(separator, prevPos);
  }
  std::stringstream ss;
  std::string       tmpString = s.substr(prevPos, (s.size() - prevPos));
  ss << tmpString;
  ss >> tVal;
  vec.push_back(tVal);
}

METAIO_EXPORT
bool
MET_StringToType(const char * _s, MET_ValueEnumType * _vType);

METAIO_EXPORT
bool
MET_TypeToString(MET_ValueEnumType _vType, char * _s);

METAIO_EXPORT
bool
MET_StringToInterpolationType(const char * _str, MET_InterpolationEnumType * _type);

METAIO_EXPORT
bool
MET_InterpolationTypeToString(MET_InterpolationEnumType _type, char * _str);

inline MET_ValueEnumType
MET_GetPixelType(const std::type_info & ptype)
{
  if (ptype == typeid(MET_UCHAR_TYPE))
  {
    return MET_UCHAR;
  }
  else if (ptype == typeid(MET_CHAR_TYPE))
  {
    return MET_CHAR;
  }
  else if (ptype == typeid(MET_USHORT_TYPE))
  {
    return MET_USHORT;
  }
  else if (ptype == typeid(MET_SHORT_TYPE))
  {
    return MET_SHORT;
  }
  else if (ptype == typeid(MET_UINT_TYPE))
  {
    return MET_UINT;
  }
  else if (ptype == typeid(MET_INT_TYPE))
  {
    return MET_INT;
  }
  else if (ptype == typeid(MET_ULONG_TYPE))
  {
    return MET_ULONG;
  }
  else if (ptype == typeid(MET_LONG_TYPE))
  {
    return MET_LONG;
  }
  else if (ptype == typeid(MET_ULONG_LONG_TYPE))
  {
    return MET_ULONG_LONG;
  }
  else if (ptype == typeid(MET_LONG_LONG_TYPE))
  {
    return MET_LONG_LONG;
  }
  else if (ptype == typeid(MET_FLOAT_TYPE))
  {
    return MET_FLOAT;
  }
  else if (ptype == typeid(MET_DOUBLE_TYPE))
  {
    return MET_DOUBLE;
  }
  else
  {
    std::cerr << "MET_GetPixelType: Couldn't convert pixel type : " << ptype.name() << std::endl;
    return MET_NONE;
  }
}

inline MET_ValueEnumType
MET_GetValueEnumType(const std::type_info & ptype)
{
  return MET_GetPixelType(ptype);
}

inline void
MET_StringStripEnd(MET_ASCII_CHAR_TYPE * str)
{
  // note the post-decrement in the condition
  for (size_t j = strlen(str); j-- > 0;)
  {
    if (isprint(str[j]) && !isspace(str[j]))
    {
      break;
    }
    str[j] = '\0';
  }
}


// VALUES
METAIO_EXPORT
bool
MET_ValueToDouble(MET_ValueEnumType _type, const void * _data, std::streamoff _index, double * _value);

METAIO_EXPORT
bool
MET_DoubleToValue(double _value, MET_ValueEnumType _type, void * _data, std::streamoff _index);

METAIO_EXPORT
bool
MET_ValueToValue(MET_ValueEnumType _fromType,
                 const void *      _fromData,
                 std::streamoff    _index,
                 MET_ValueEnumType _toType,
                 void *            _toData,
                 double            _fromMin = 0,
                 double            _fromMax = 0,
                 double            _toMin = 0,
                 double            _toMax = 0);

METAIO_EXPORT
unsigned char *
MET_PerformCompression(const unsigned char * source,
                       std::streamoff        sourceSize,
                       std::streamoff *      compressedDataSize,
                       int                   compressionLevel);

METAIO_EXPORT
bool
MET_PerformUncompression(const unsigned char * sourceCompressed,
                         std::streamoff        sourceCompressedSize,
                         unsigned char *       uncompressedData,
                         std::streamoff        uncompressedDataSize);

// Uncompress a stream given an uncompressedSeekPosition
METAIO_EXPORT
std::streamoff
MET_UncompressStream(std::ifstream *            stream,
                     std::streamoff             uncompressedSeekPosition,
                     unsigned char *            uncompressedData,
                     std::streamoff             uncompressedDataSize,
                     std::streamoff             compressedDataSize,
                     MET_CompressionTableType * compressionTable);


// FILES NAMES
METAIO_EXPORT
bool
MET_GetFilePath(const std::string & _fName, std::string & _fPath);

METAIO_EXPORT
bool
MET_GetFileSuffixPtr(const std::string & _fName, int * i);

METAIO_EXPORT
bool
MET_SetFileSuffix(std::string & _fName, const std::string & _suf);

METAIO_EXPORT
bool
MET_InitWriteField(MET_FieldRecordType * _mf, const char * _name, MET_ValueEnumType _type, double _v = 0);

template <class T>
bool
MET_InitWriteField(MET_FieldRecordType * _mf, const char * _name, MET_ValueEnumType _type, size_t _length, T * _v)
{
  strncpy(_mf->name, _name, 254);
  _mf->name[254] = '\0';
  _mf->type = _type;
  _mf->defined = true;
  _mf->length = static_cast<int>(_length);
  _mf->dependsOn = -1;
  _mf->required = false;
  _mf->terminateRead = false;
  if (_type == MET_FLOAT_MATRIX)
  {
    size_t i;
    for (i = 0; i < MET_MAX_NUMBER_OF_FIELD_VALUES && i < _length * _length; i++)
    {
      _mf->value[i] = (double)(_v[i]);
    }
  }
  else if (_type != MET_STRING)
  {
    size_t i;
    for (i = 0; i < MET_MAX_NUMBER_OF_FIELD_VALUES && i < _length; i++)
    {
      _mf->value[i] = (double)(_v[i]);
    }
  }
  else
  {
    strncpy((char *)(_mf->value), (const char *)_v, (sizeof(_mf->value) - 1));
    ((char *)(_mf->value))[(sizeof(_mf->value) - 1)] = '\0';
  }
  return true;
}

METAIO_EXPORT
bool
MET_Write(std::ostream & fp, std::vector<MET_FieldRecordType *> * fields, char _met_SeperatorChar = '=');

METAIO_EXPORT
bool
MET_WriteFieldToFile(std::ostream & _fp, const char * _fieldName, MET_ValueEnumType _pType, size_t _n, const void * _v);

METAIO_EXPORT
bool
MET_WriteFieldToFile(std::ostream & _fp, const char * _fieldName, MET_ValueEnumType _pType, double _v);


METAIO_EXPORT
bool
MET_InitReadField(MET_FieldRecordType * _mf,
                  const char *          _name,
                  MET_ValueEnumType     _type,
                  bool                  _required = true,
                  int                   _dependsOn = -1,
                  size_t                _length = 0);

METAIO_EXPORT
bool
MET_Read(std::istream &                       fp,
         std::vector<MET_FieldRecordType *> * fields,
         char                                 _met_SeperatorChar = '=',
         bool                                 oneLine = false,
         bool                                 display_warnings = true,
         std::vector<MET_FieldRecordType *> * newFields = nullptr);


METAIO_EXPORT
std::string
MET_ReadForm(std::istream & _fp);

METAIO_EXPORT
std::string
MET_ReadType(std::istream & _fp);

METAIO_EXPORT
char *
MET_ReadSubType(std::istream & _fp);

#  if (METAIO_USE_NAMESPACE)
};
#  endif


#endif