/*
    Copyright (C) 2012 Carl Hetherington <cth@carlh.net>

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

*/

/** @file src/server.h
 *  @brief Class to describe a server to which we can send
 *  encoding work, and a class to implement such a server.
 */

#include <string>
#include <boost/thread.hpp>
#include <boost/asio.hpp>
#include <boost/thread/condition.hpp>
#include "log.h"

class Socket;

/** @class ServerDescription
 *  @brief Class to describe a server to which we can send encoding work.
 */
class ServerDescription
{
public:
	/** @param h Server host name or IP address in string form.
	 *  @param t Number of threads to use on the server.
	 */
	ServerDescription (std::string h, int t)
		: _host_name (h)
		, _threads (t)
	{}

	/** @return server's host name or IP address in string form */
	std::string host_name () const {
		return _host_name;
	}

	/** @return number of threads to use on the server */
	int threads () const {
		return _threads;
	}

	void set_host_name (std::string n) {
		_host_name = n;
	}

	void set_threads (int t) {
		_threads = t;
	}

	std::string as_metadata () const;
	
	static ServerDescription * create_from_metadata (std::string v);

private:
	/** server's host name */
	std::string _host_name;
	/** number of threads to use on the server */
	int _threads;
};

class Server
{
public:
	Server (Log* log);

	void run (int num_threads);

private:
	void worker_thread ();
	int process (boost::shared_ptr<Socket> socket);

	std::vector<boost::thread *> _worker_threads;
	std::list<boost::shared_ptr<Socket> > _queue;
	boost::mutex _worker_mutex;
	boost::condition _worker_condition;
	Log* _log;
};