#include <list>
#include <utility>
#include "nlsr_npte.hpp"
#include "nlsr_rte.hpp"
#include "nlsr_nexthop.hpp"

namespace nlsr
{

    using namespace std;

    void
    Npte::generateNhlfromRteList()
    {
        nhl.resetNhl();
        for( std::list<RoutingTableEntry>::iterator it=rteList.begin();
                it != rteList.end(); ++it )
        {
            for(std::list< NextHop >::iterator nhit=(*it).getNhl().getNextHopList().begin();
                    nhit != (*it).getNhl().getNextHopList().end(); ++nhit)
            {
                nhl.addNextHop((*nhit));
            }
        }
    }


    static bool
    rteCompare(RoutingTableEntry& rte, string& destRouter)
    {
        return rte.getDestination()==destRouter;
    }

    void
    Npte::removeRoutingTableEntry(RoutingTableEntry& rte)
    {
        std::list<RoutingTableEntry >::iterator it = std::find_if( rteList.begin(),
                rteList.end(),
                bind(&rteCompare, _1, rte.getDestination()));
        if ( it != rteList.end() )
        {
            rteList.erase(it);
        }
    }

    void
    Npte::addRoutingTableEntry(RoutingTableEntry &rte)
    {
        std::list<RoutingTableEntry >::iterator it = std::find_if( rteList.begin(),
                rteList.end(),
                bind(&rteCompare, _1, rte.getDestination()));
        if ( it == rteList.end() )
        {
            rteList.push_back(rte);
        }
        else
        {
            (*it).getNhl().resetNhl(); // reseting existing routing table's next hop
            for(std::list< NextHop >::iterator nhit=rte.getNhl().getNextHopList().begin();
                    nhit != rte.getNhl().getNextHopList().end(); ++nhit)
            {
                (*it).getNhl().addNextHop((*nhit));
            }
        }
    }

//debugging purpose
    ostream&
    operator<<(ostream& os, Npte& npte)
    {
        os<<"Name: "<<npte.getNamePrefix()<<endl;
        std::list<RoutingTableEntry> rteList=npte.getRteList();
        for(std::list<RoutingTableEntry >::iterator it=rteList.begin();
                it !=rteList.end(); ++it)
        {
            cout<<(*it);
        }
        os<<npte.getNhl();
        return os;
    }

}//namespace nlsr