// Copyright (c) 2006-2013, Andrey N. Sabelnikov, www.sabelnikov.net
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
// * Neither the name of the Andrey N. Sabelnikov nor the
// names of its contributors may be used to endorse or promote products
// derived from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER  BE LIABLE FOR ANY
// DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
// ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//

#pragma once

#include "common/gulps.hpp"


namespace epee
{
namespace misc_utils
{
namespace parse
{
inline std::string transform_to_escape_sequence(const std::string &src)
{
	//std::stringstream res;
	std::string res;
	for(std::string::const_iterator it = src.begin(); it != src.end(); ++it)
	{
		switch(*it)
		{
		case '\b': //Backspace (ascii code 08)
			res += "\\b";
			break;
		case '\f': //Form feed (ascii code 0C)
			res += "\\f";
			break;
		case '\n': //New line
			res += "\\n";
			break;
		case '\r': //Carriage return
			res += "\\r";
			break;
		case '\t': //Tab
			res += "\\t";
			break;
		case '\v': //Vertical tab
			res += "\\v";
			break;
		//case '\'':  //Apostrophe or single quote
		//  res+="\\'"; break;
		case '"': //Double quote
			res += "\\\"";
			break;
		case '\\': //Backslash caracter
			res += "\\\\";
			break;
		case '/': //Backslash caracter
			res += "\\/";
			break;
		default:
			res.push_back(*it);
		}
	}
	return res;
}
/*

      \b  Backspace (ascii code 08)
      \f  Form feed (ascii code 0C)
      \n  New line
      \r  Carriage return
      \t  Tab
      \v  Vertical tab
      \'  Apostrophe or single quote
      \"  Double quote
      \\  Backslash character

      */
inline void match_string2(std::string::const_iterator &star_end_string, std::string::const_iterator buf_end, std::string &val)
{
	val.clear();
	bool escape_mode = false;
	std::string::const_iterator it = star_end_string;
	++it;
	GULPS_CAT_MAJOR("epee_pars_bs_utls");
	for(; it != buf_end; it++)
	{
		if(escape_mode /*prev_ch == '\\'*/)
		{
			switch(*it)
			{
			case 'b': //Backspace (ascii code 08)
				val.push_back(0x08);
				break;
			case 'f': //Form feed (ascii code 0C)
				val.push_back(0x0C);
				break;
			case 'n': //New line
				val.push_back('\n');
				break;
			case 'r': //Carriage return
				val.push_back('\r');
				break;
			case 't': //Tab
				val.push_back('\t');
				break;
			case 'v': //Vertical tab
				val.push_back('\v');
				break;
			case '\'': //Apostrophe or single quote
				val.push_back('\'');
				break;
			case '"': //Double quote
				val.push_back('"');
				break;
			case '\\': //Backslash character
				val.push_back('\\');
				break;
			case '/': //Slash character
				val.push_back('/');
				break;
			default:
				val.push_back(*it);
				GULPSF_PRINT("Unknown escape sequence :\"\\{}\"", *it);
			}
			escape_mode = false;
		}
		else if(*it == '"')
		{
			star_end_string = it;
			return;
		}
		else if(*it == '\\')
		{
			escape_mode = true;
		}
		else
		{
			val.push_back(*it);
		}
	}
	GULPS_ASSERT_MES_AND_THROW("Failed to match string in json entry: ", std::string(star_end_string, buf_end));
}
inline bool match_string(std::string::const_iterator &star_end_string, std::string::const_iterator buf_end, std::string &val)
{
	try
	{

		match_string2(star_end_string, buf_end, val);
		return true;
	}
	catch(...)
	{
		return false;
	}
}
inline void match_number2(std::string::const_iterator &star_end_string, std::string::const_iterator buf_end, std::string &val, bool &is_float_val, bool &is_signed_val)
{
	val.clear();
	is_float_val = false;
	GULPS_CAT_MAJOR("epee_pars_bs_utls");
	for(std::string::const_iterator it = star_end_string; it != buf_end; it++)
	{
		if(isdigit(*it) || (it == star_end_string && *it == '-') || (val.size() && *it == '.') || (is_float_val && (*it == 'e' || *it == 'E' || *it == '-' || *it == '+')))
		{
			if(!val.size() && *it == '-')
				is_signed_val = true;
			if(*it == '.')
				is_float_val = true;
			val.push_back(*it);
		}
		else
		{
			if(val.size())
			{
				star_end_string = --it;
				return;
			}
			else
				GULPS_ASSERT_MES_AND_THROW("wrong number in json entry: ", std::string(star_end_string, buf_end));
		}
	}
	GULPS_ASSERT_MES_AND_THROW("wrong number in json entry: ", std::string(star_end_string, buf_end));
}
inline bool match_number(std::string::const_iterator &star_end_string, std::string::const_iterator buf_end, std::string &val)
{
	try
	{
		bool is_v_float = false;
		bool is_signed_val = false;
		match_number2(star_end_string, buf_end, val, is_v_float, is_signed_val);
		return !is_v_float;
	}
	catch(...)
	{
		return false;
	}
}
inline void match_word2(std::string::const_iterator &star_end_string, std::string::const_iterator buf_end, std::string &val)
{
	val.clear();
	GULPS_CAT_MAJOR("epee_pars_bs_utls");
	for(std::string::const_iterator it = star_end_string; it != buf_end; it++)
	{
		if(!isalpha(*it))
		{
			val.assign(star_end_string, it);
			if(val.size())
			{
				star_end_string = --it;
				return;
			}
			else
				GULPS_ASSERT_MES_AND_THROW("failed to match word number in json entry: ", std::string(star_end_string, buf_end));
		}
	}
	GULPS_ASSERT_MES_AND_THROW("failed to match word number in json entry: ", std::string(star_end_string, buf_end));
}
inline bool match_word(std::string::const_iterator &star_end_string, std::string::const_iterator buf_end, std::string &val)
{
	try
	{
		match_word2(star_end_string, buf_end, val);
		return true;
	}
	catch(...)
	{
		return false;
	}
}
inline bool match_word_with_extrasymb(std::string::const_iterator &star_end_string, std::string::const_iterator buf_end, std::string &val)
{
	val.clear();

	for(std::string::const_iterator it = star_end_string; it != buf_end; it++)
	{
		if(!isalnum(*it) && *it != '-' && *it != '_')
		{
			val.assign(star_end_string, it);
			if(val.size())
			{
				star_end_string = --it;
				return true;
			}
			else
				return false;
		}
	}
	return false;
}
inline bool match_word_til_equal_mark(std::string::const_iterator &star_end_string, std::string::const_iterator buf_end, std::string::const_iterator &word_end)
{
	word_end = star_end_string;

	for(std::string::const_iterator it = star_end_string; it != buf_end; it++)
	{
		if(isspace(*it))
		{

			continue;
		}
		else if(*it == '=')
		{
			star_end_string = it;
			word_end = it;
			return true;
		}
	}
	return false;
}
}
}
}
