/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/**
 * Copyright (c) 2014,  Regents of the University of California,
 *                      Arizona Board of Regents,
 *                      Colorado State University,
 *                      University Pierre & Marie Curie, Sorbonne University,
 *                      Washington University in St. Louis,
 *                      Beijing Institute of Technology,
 *                      The University of Memphis
 *
 * This file is part of NFD (Named Data Networking Forwarding Daemon).
 * See AUTHORS.md for complete list of NFD authors and contributors.
 *
 * NFD 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 3 of the License, or (at your option) any later version.
 *
 * NFD 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
 * NFD, e.g., in COPYING.md file.  If not, see <http://www.gnu.org/licenses/>.
 */

#include "fib-entry.hpp"

namespace nfd {
namespace fib {

Entry::Entry(const Name& prefix)
  : m_prefix(prefix)
{
}

NextHopList::iterator
Entry::findNextHop(Face& face)
{
  return std::find_if(m_nextHops.begin(), m_nextHops.end(),
                      [&face] (const NextHop& nexthop) {
                        return nexthop.getFace().get() == &face;
                      });
}

bool
Entry::hasNextHop(shared_ptr<Face> face) const
{
  return const_cast<Entry*>(this)->findNextHop(*face) != m_nextHops.end();
}

void
Entry::addNextHop(shared_ptr<Face> face, uint64_t cost)
{
  auto it = this->findNextHop(*face);
  if (it == m_nextHops.end()) {
    m_nextHops.push_back(fib::NextHop(face));
    it = m_nextHops.end();
    --it;
  }
  // now it refers to the NextHop for face

  it->setCost(cost);

  this->sortNextHops();
}

void
Entry::removeNextHop(shared_ptr<Face> face)
{
  auto it = this->findNextHop(*face);
  if (it != m_nextHops.end()) {
    m_nextHops.erase(it);
  }
}

void
Entry::sortNextHops()
{
  std::sort(m_nextHops.begin(), m_nextHops.end(),
            [] (const NextHop& a, const NextHop& b) { return a.getCost() < b.getCost(); });
}


} // namespace fib
} // namespace nfd