/***************************************************************************
 *   Copyright (C) 2006 by Gerd v. Egidy                                   *
 *   gve@intra2net.com                                                     *
 *                                                                         *
 *   This library is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU Lesser General Public License version   *
 *   2.1 as published by the Free Software Foundation.                     *
 *                                                                         *
 *   This library 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 Lesser General Public License for more details.                   *
 *                                                                         *
 *   You should have received a copy of the GNU Lesser General Public      *
 *   License along with this program; if not, write to the                 *
 *   Free Software Foundation, Inc.,                                       *
 *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
 ***************************************************************************/
#ifndef __LIBT2N_SERVER
#define __LIBT2N_SERVER

#include <iostream>
#include <string>
#include <map>

namespace libt2n
{

/**
    Basic connection class
*/
class connection
{
    private:
        int timeout;
        int last_action_time;
        bool closed;
        std::string buffer;

    protected:
        connection(int _timeout)
        {
            set_timeout(_timeout);
            reset_timeout();
            closed=false;
        }

    public:
        ~connection()
            { this->close(); }

        void check_timeout();
        void reset_timeout();
        void set_timeout(int _timeout)
            { timeout=_timeout; }

        bool is_closed()
            { return closed; }

        virtual void close()
            { closed=true; }

        virtual void fill_buffer(void)=0;

        bool get_packet(std::string& data, unsigned int& conn_id);
        virtual void write(const std::string& data)=0;
};

/**
    Basic server class
*/
class server
{
    public:
        enum log_level_values { none=0, error=1, debug=2 };

    private:
        int default_timeout;
        log_level_values log_level;
        std::ostream *logstream;

        unsigned int next_id;
        std::map<unsigned int, connection*> connections;

    protected:
        server()
        {
            set_default_timeout(30);
            set_logging(NULL,none);
            next_id=0;
        }

    public:
        virtual ~server();

        void set_default_timeout(int _default_timeout)
            { default_timeout=_default_timeout; }

        void set_logging(std::ostream *_logstream, log_level_values _log_level)
        {
            log_level=_log_level;
            logstream=_logstream;
        }

        connection* get_connection(unsigned int conn_id);

        virtual void fill_buffer(long long usec_timeout=-1)=0;
        void check_timeout();

        bool get_packet(std::string& data, unsigned int& conn_id);

        void fill_connection_buffers(void);

    protected:
        void log(log_level_values level, const std::string& message)
            { log(level,message.c_str()); }
        void log(log_level_values level, const char* message);
};

}

#endif