/* -*- 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/>.
 */

#ifndef NFD_RIB_FIB_UPDATE_HPP
#define NFD_RIB_FIB_UPDATE_HPP

#include "common.hpp"

namespace nfd {
namespace rib {

/** \class FibUpdate
 *  \brief represents a FIB update
 */
class FibUpdate
{
public:
  FibUpdate()
    : faceId(0)
    , cost(0)
  {
  }

  static shared_ptr<FibUpdate>
  createAddUpdate(const Name& name, const uint64_t faceId, const uint64_t cost);

  static shared_ptr<FibUpdate>
  createRemoveUpdate(const Name& name, const uint64_t faceId);

  enum Action
  {
    ADD_NEXTHOP    = 0,
    REMOVE_NEXTHOP = 1
  };

public:
  Name name;
  uint64_t faceId;
  uint64_t cost;
  Action action;
};

inline std::ostream&
operator<<(std::ostream& os, const FibUpdate& update)
{
  os << "FibUpdate("
     << " Name: " << update.name << ", "
     << "faceId: " << update.faceId << ", ";

  if (update.action == FibUpdate::ADD_NEXTHOP)
    {
      os << "cost: " << update.cost << ", "
         << "action: ADD_NEXTHOP";
    }
  else
    {
      os << "action: REMOVE_NEXTHOP";
    }

  os << ")";

  return os;
}

} // namespace rib
} // namespace nfd

#endif // NFD_RIB_FIB_UPDATE_HPP