/*
 * This file is a part of Winix
 * and is distributed under the 2-Clause BSD licence.
 * Author: Tomasz Sowa <t.sowa@ttmath.org>
 */

/*
 * Copyright (c) 2022, Tomasz Sowa
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the following disclaimer.
 *
 * 2. 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.
 *
 * 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 HOLDER OR CONTRIBUTORS 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.
 *
 */

#ifndef headerfile_winix_core_acceptparser
#define headerfile_winix_core_acceptparser

#include "utils/acceptbaseparser.h"
#include "log.h"
#include "header.h"


namespace Winix
{



class AcceptParser : public AcceptBaseParser
{
public:

	static constexpr size_t MAX_CONTAINER_LENGTH = 16;

	/*
	 * IMPROVEME add support for something like "text/html;level=1" (skip the level part)
	 *
	 * https://developer.mozilla.org/en-US/docs/Glossary/Quality_values
	 * Some syntax, like the one of Accept, allow additional specifiers like text/html;level=1.
	 * These increase the specificity of the value. Their use is extremely rare.
	 *
	 *
	*/

	void Parse(const wchar_t * str, std::vector<HeaderValue> & header_values, bool clear_header_values = true)
	{
		if( clear_header_values )
			header_values.clear();

		this->header_values = &header_values;
		AcceptBaseParser::parse(str);

		std::sort(header_values.begin(), header_values.end(), [](HeaderValue & h1, HeaderValue & h2) -> bool {
			return h1.weight > h2.weight;
		});

		PutToLog(header_values);
	}


	void Parse(const std::wstring & str, std::vector<HeaderValue> & header_values, bool clear_header_values = true)
	{
		Parse(str.c_str(), header_values, clear_header_values);
	}


private:

	std::vector<HeaderValue> * header_values;

	void Param(const std::wstring & param, double q)
	{
		if( header_values->size() < MAX_CONTAINER_LENGTH && q > 0.0 )
		{
			if( q > 1.0 )
				q = 1.0;

			header_values->resize(header_values->size() + 1);
			header_values->back().value = param;
			header_values->back().weight = q;
		}
	}

	void PutToLog(std::vector<HeaderValue> & header_values)
	{
		if( !header_values.empty() )
		{
			log << log3 << "AP: " << Header::accept << " header consists of: ";
			HeaderValue::log_values(header_values, log);
			log << logend;
		}
		else
		{
			log << log3 << "AP: there is no " << Header::accept << " header" << logend;
		}
	}

};



} // namespace Winix


#endif