#include "tconvert.h"
//#include "texception.h"
#include "tfilepath.h"

#ifndef TNZCORE_LIGHT
#include <QString>
#endif

#ifdef _MSC_VER
#pragma warning(disable : 4996)
#endif

#ifdef _WIN32
#include "windows.h"
#endif

#include <sstream>

class TStringConvertException final : public TException {
  std::string m_string;

public:
  TStringConvertException(const std::string str) : m_string(str) {}
};

std::wstring to_wstring(std::string s) {
#ifdef TNZCORE_LIGHT
  std::wstring ws;
  ws.assign(s.begin(), s.end());
  return ws;
#else

  QString testString = QString::fromStdString(s);
  QString qString    = QString::fromUtf8(s.c_str());

  // To detect if 's' is UTF-8 encoded or not
  if (qString != testString && std::string(qString.toUtf8()) == s)
    return qString.toStdWString();
  else
    return testString.toStdWString();
#endif
}

std::string to_string(std::wstring ws) {
#ifdef TNZCORE_LIGHT
  std::string s;
  s.assign(ws.begin(), ws.end());
  return s;
#else
  QString const qString = QString::fromStdWString(ws);

  // Test if 'ws' is not unicode (UTF-8)
  if (qString.toLatin1() == qString) return qString.toStdString();

  return std::string(qString.toUtf8());
#endif
}

std::string to_string(const TFilePath &fp) {
  return ::to_string(fp.getWideString());
}

/*!
  The  default precision is six decimal places. If the
  precision is less than of the decimal places in the fractonal
  part, the remainder is not cut off but rounded.
*/

std::string to_string(double value, int prec) {
  if (prec < 0) {
    return std::to_string(value);
  }

  std::ostringstream out;
  out.setf(std::ios_base::fixed, std::ios_base::floatfield);
  out.precision(prec);
  out << value;
  return out.str();
}

std::string to_string(void *p) {
  std::ostringstream out;
  out << p;
  return out.str();
}

bool isInt(std::string s) {
  int i = 0, len = (int)s.size();
  if (len == 0) return false;
  if (s[0] == '-') {
    if (len == 1)
      return false;
    else
      i++;
  }

  while (i < len) {
    if (s[i] < '0' || s[i] > '9') return false;
    i++;
  }
  return true;
}

bool isDouble(std::string s) {
  int i = 0, len = (int)s.size();
  if (len == 0) return false;
  if (i < len && s[i] == '-') i++;
  while (i < len && s[i] != '.') {
    if (s[i] < '0' || s[i] > '9') return false;
    i++;
  }
  if (i >= len) return true;
  i++;
  while (i < len) {
    if (s[i] < '0' || s[i] > '9') return false;
    i++;
  }
  return true;
}

bool isInt(std::wstring s) { return isInt(::to_string(s)); }
bool isDouble(std::wstring s) { return isDouble(::to_string(s)); }

std::string toUpper(std::string a) {
#ifdef _WIN32
  return _strupr(const_cast<char *>(a.c_str()));
#else
  std::string ret = a;
  for (int i = 0; i < (int)ret.length(); i++) ret[i] = toupper(ret[i]);
  return ret;
#endif
}

std::string toLower(std::string a) {
#ifdef _WIN32
  return _strlwr(const_cast<char *>(a.c_str()));
#else
  std::string ret = a;
  for (int i = 0; i < (int)ret.length(); i++) ret[i] = tolower(ret[i]);
  return ret;
#endif
}

std::wstring toUpper(std::wstring a) {
#ifdef _WIN32
  return _wcsupr(const_cast<wchar_t *>(a.c_str()));
#else
  std::wstring ret;
  for (int i = 0; i < (int)a.length(); i++) {
    wchar_t c = towupper(a[i]);
    ret += c;
  }
  return ret;
#endif
}

std::wstring toLower(std::wstring a) {
#ifdef _WIN32
  return _wcslwr(const_cast<wchar_t *>(a.c_str()));
#else
  const int length = (int)a.length();
  std::wstring ret;
  ret.resize(length);
  for (int i = 0; i < length; i++) {
    ret[i] = towlower(a[i]);
  }
  return ret;
#endif
}