////////////////////////////////////////////////////////////////////////////////
//
// Copyright 2016 - 2019, Thomas Lauf, Paul Beckingham, Federico Hernandez.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
//
// https://www.opensource.org/licenses/mit-license.php
//
////////////////////////////////////////////////////////////////////////////////

#include <cmake.h>
#include <timew.h>
#include <string>

////////////////////////////////////////////////////////////////////////////////
// Escape all 'c' --> '\c'.
std::string escape (const std::string& input, int c)
{
  std::string output;

  auto last = input.begin ();
  for (auto i = input.begin (); i != input.end (); ++i)
  {
    if (*i == c)
    {
      output.append (last, i);
      output += std::string ("\\") + *i;
      last = i + 1;
    }

    // Default NOP.
  }

  output.append (last, input.end ());
  return output;
}

////////////////////////////////////////////////////////////////////////////////
std::string quoteIfNeeded (const std::string& input)
{
  if (input[0] == '"' || input[0] == '\'')
  {
    return input;
  }

  auto quote = input.find ('"');
  auto space = input.find (' ');
  auto op    = input.find_first_of ("+-/()<^!=~_%");

  if (quote == std::string::npos &&
      space == std::string::npos &&
      op    == std::string::npos)
  {
    return input;
  }

  std::string output;
  if (quote != std::string::npos)
  {
    output = escape (input, '"');
  }
  else
  {
    output = input;
  }

  return std::string ("\"") + output + "\"";
}

////////////////////////////////////////////////////////////////////////////////

std::string join(const std::string& glue, const std::set <std::string>& array)
{
  if (array.empty ())
  {
    return "";
  }

  auto iterator = array.begin ();

  std::string value = *iterator++;

  while (iterator != array.end ())
  {
    value += glue + *iterator++;
  }

  return value;
}

////////////////////////////////////////////////////////////////////////////////

std::string joinQuotedIfNeeded(const std::string& glue, const std::set <std::string>& array)
{
  if (array.empty ())
  {
    return "";
  }

  auto iterator = array.begin ();

  std::string value = *iterator++;

  while (iterator != array.end ())
  {
    value += glue + quoteIfNeeded(*iterator++);
  }

  return value;
}

////////////////////////////////////////////////////////////////////////////////

std::string joinQuotedIfNeeded(const std::string& glue, const std::vector <std::string>& array)
{
  if (array.empty ())
  {
    return "";
  }

  auto iterator = array.begin ();

  std::string value = *iterator++;

  while (iterator != array.end ())
  {
    value += glue + quoteIfNeeded(*iterator++);
  }

  return value;
}

////////////////////////////////////////////////////////////////////////////////
