/*
 *    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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

/*
 *    Author : Maxim Mamontov <faust@stargazer.dp.ua>
 */

#pragma once

#include "rscript.h"

#include "stg/common.h"

#include <functional>
#include <algorithm>
#include <utility>
#include <cstdint>

namespace STG::RS
{

class UpdateRouter : public std::unary_function<std::pair<const uint32_t, RS::USER>, void>
{
    public:
        explicit UpdateRouter(REMOTE_SCRIPT & t)
            : obj(t) {}

        void operator() (std::pair<const uint32_t, USER> & val)
            {
            std::vector<uint32_t> newRouters = obj.IP2Routers(val.second.ip);
            std::vector<uint32_t>::const_iterator oldIt(val.second.routers.begin());
            std::vector<uint32_t>::const_iterator newIt(newRouters.begin());
            val.second.shortPacketsCount = 0;
            while (oldIt != val.second.routers.end() ||
                   newIt != newRouters.end())
                {
                if (oldIt == val.second.routers.end())
                    {
                    if (newIt != newRouters.end())
                        {
                        obj.SendDirect(val.second, *newIt); // Connect on new router
                        ++newIt;
                        }
                    }
                else if (newIt == newRouters.end())
                    {
                    obj.SendDirect(val.second, *oldIt, true); // Disconnect on old router
                    ++oldIt;
                    }
                else if (*oldIt < *newIt)
                    {
                    obj.SendDirect(val.second, *oldIt, true); // Disconnect on old router
                    ++oldIt;
                    }
                else if (*oldIt > *newIt)
                    {
                    obj.SendDirect(val.second, *newIt); // Connect on new router
                    ++newIt;
                    }
                else
                    {
                    ++oldIt;
                    if (newIt != newRouters.end())
                        ++newIt;
                    }
                }
            val.second.routers = newRouters;
            }
    private:
        REMOTE_SCRIPT & obj;
};

} // namespace RS