/* -*-  Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil; -*- */
/*
 * Copyright (c) 2011 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>
 */

#include "ndn-consumer-batches.hpp"
#include "ns3/ptr.h"
#include "ns3/log.h"
#include "ns3/simulator.h"
#include "ns3/packet.h"
#include "ns3/callback.h"
#include "ns3/string.h"
#include "ns3/uinteger.h"
#include "ns3/double.h"

#include "../utils/batches.hpp"

NS_LOG_COMPONENT_DEFINE("ndn.ConsumerBatches");

namespace ns3 {
namespace ndn {

NS_OBJECT_ENSURE_REGISTERED(ConsumerBatches);

TypeId
ConsumerBatches::GetTypeId(void)
{
  static TypeId tid =
    TypeId("ns3::ndn::ConsumerBatches")
      .SetGroupName("Ndn")
      .SetParent<Consumer>()
      .AddConstructor<ConsumerBatches>()

      .AddAttribute("Batches",
                    "Batches to schedule. Should be vector, containing pairs of time and amount",
                    // TypeId::ATTR_SET,
                    StringValue(""), MakeBatchesAccessor(&ConsumerBatches::m_batches),
                    MakeBatchesChecker());

  return tid;
}

ConsumerBatches::ConsumerBatches()
  : m_initial(true)
{
}

void
ConsumerBatches::StartApplication()
{
  Consumer::StartApplication();

  // std::cout << "Batches: " << batches << "\n";
  for (Batches::const_iterator i = m_batches.begin(); i != m_batches.end(); i++) {
    Simulator::ScheduleWithContext(GetNode()->GetId(), i->get<0>(), &ConsumerBatches::AddBatch,
                                   this, i->get<1>());
  }
}

void
ConsumerBatches::AddBatch(uint32_t amount)
{
  // std::cout << Simulator::Now () << " adding batch of " << amount << "\n";
  m_seqMax += amount;
  m_rtt->ClearSent(); // this is important, otherwise RTT estimation for the new batch will be
                      // affected by previous batch history
  m_initial = true;
  ScheduleNextPacket();
}

void
ConsumerBatches::ScheduleNextPacket()
{
  if (!m_sendEvent.IsRunning()) {
    Time delay = Seconds(0);
    if (!m_initial)
      delay = m_rtt->RetransmitTimeout();

    m_initial = false;
    m_sendEvent = Simulator::Schedule(delay, &Consumer::SendPacket, this);
  }
}

///////////////////////////////////////////////////
//          Process incoming packets             //
///////////////////////////////////////////////////

} // namespace ndn
} // namespace ns3