/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/**
 * Copyright (c) 2011-2015  Regents of the University of California.
 *
 * This file is part of ndnSIM. See AUTHORS for complete list of ndnSIM authors and
 * contributors.
 *
 * ndnSIM 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.
 *
 * ndnSIM 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
 * ndnSIM, e.g., in COPYING.md file.  If not, see <http://www.gnu.org/licenses/>.
 **/

#ifndef PAYLOAD_WITH_INDEX_H_
#define PAYLOAD_WITH_INDEX_H_

namespace ns3 {
namespace ndn {
namespace ndnSIM {

template<typename PayloadTraits, typename IndexTraits>
class payload_with_index {
public:
  typedef PayloadTraits::pointer_type iterator;

  typedef typename IndexTraits::
    template index<PayloadTraits,
                   typename IndexTraits::template container_hook<parent_trie>::type>::type
      index_container;

  inline payload_with_index()
    : index_(*this)
  {
  }

  inline std::pair<iterator, bool>
  insert(typename iterator payload)
  {
    bool ok = policy_.insert(s_iterator_to(item.first));
    if (!ok) {
      item.first->erase(); // cannot insert
      return std::make_pair(end(), false);
    }

    return item;
  }

  // inline void
  // erase (const FullKey &key)
  // {
  //   iterator foundItem, lastItem;
  //   bool reachLast;
  //   std::tie (foundItem, reachLast, lastItem) = trie_.find (key);

  //   if (!reachLast || lastItem->payload () == PayloadTraits::empty_payload)
  //     return; // nothing to invalidate

  //   erase (lastItem);
  // }

  // inline void
  // erase (iterator node)
  // {
  //   if (node == end ()) return;

  //   policy_.erase (s_iterator_to (node));
  //   node->erase (); // will do cleanup here
  // }

  // inline void
  // clear ()
  // {
  //   policy_.clear ();
  //   trie_.clear ();
  // }

  // template<typename Modifier>
  // bool
  // modify (iterator position, Modifier mod)
  // {
  //   if (position == end ()) return false;
  //   if (position->payload () == PayloadTraits::empty_payload) return false;

  //   mod (*position->payload ());
  //   policy_.update (position);
  //   return true;
  // }

private:
  mutable index_container policy_;
};

} // ndnSIM
} // ndn
} // ns3

#endif // PAYLOAD_WITH_POLICY_H_