/* -*-  Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil; -*- */
/*
 * Copyright (c) 2012-2013 University of California, Los Angeles
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation;
 *
 * 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: Alexander Afanasyev <alexander.afanasyev@ucla.edu>
 */

#ifndef NDN_CONTENT_STORE_WITH_PROBABILITY_H_
#define NDN_CONTENT_STORE_WITH_PROBABILITY_H_

#include "content-store-impl.h"

#include "../../utils/trie/multi-policy.h"
#include "custom-policies/probability-policy.h"
#include "ns3/double.h"
#include "ns3/type-id.h"

namespace ns3 {
namespace ndn {
namespace cs {

/**
 * @ingroup ndn-cs
 * @brief Special content store realization that honors Freshness parameter in Data packets
 */
template<class Policy>
class ContentStoreWithProbability :
    public ContentStoreImpl< ndnSIM::multi_policy_traits< boost::mpl::vector2< ndnSIM::probability_policy_traits, Policy > > >
{
public:
  typedef ContentStoreImpl< ndnSIM::multi_policy_traits< boost::mpl::vector2< ndnSIM::probability_policy_traits, Policy > > > super;

  typedef typename super::policy_container::template index<0>::type probability_policy_container;

  ContentStoreWithProbability () {};
  
  static TypeId
  GetTypeId ();
private:

  void SetCacheProbability (double probability)
  {
    this->getPolicy ()
      .template get<probability_policy_container> ()
      .set_probability (probability);
  }

  double
  GetCacheProbability () const
  {
    return 
      this->getPolicy ()
      .template get<probability_policy_container> ()
      .get_probability ();
  }
};

//////////////////////////////////////////
////////// Implementation ////////////////
//////////////////////////////////////////

template<class Policy>
TypeId
ContentStoreWithProbability< Policy >::GetTypeId ()
{
  static TypeId tid = TypeId (("ns3::ndn::cs::Probability::"+Policy::GetName ()).c_str ())
    .SetGroupName ("Ndn")
    .SetParent<super> ()
    .template AddConstructor< ContentStoreWithProbability< Policy > > ()

    .AddAttribute ("CacheProbability",
                   "Set probability of caching in ContentStore. "
                   "If 1, every content is cached. If 0, no content is cached.",
                   DoubleValue (1.0),//(+)
                   MakeDoubleAccessor (&ContentStoreWithProbability< Policy >::GetCacheProbability,
                                       &ContentStoreWithProbability< Policy >::SetCacheProbability),
                   MakeDoubleChecker<double> ())
    ;

  return tid;
}


} // namespace cs
} // namespace ndn
} // namespace ns3

#endif // NDN_CONTENT_STORE_WITH_PROBABILITY_H_