/* -*-  Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil; -*- */

/*

 * Copyright (c) 2010 TELEMATICS LAB, DEE - Politecnico di Bari

 *

 * 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: Giuseppe Piro  <g.piro@poliba.it>

 * Author: Marco Miozzo <mmiozzo@cttc.es> : Update to FF API Architecture

 * Author: Nicola Baldo <nbaldo@cttc.es>  : Integrated with new RRC and MAC architecture

 */

#include <ns3/llc-snap-header.h>

#include <ns3/simulator.h>

#include <ns3/callback.h>

#include <ns3/node.h>

#include <ns3/packet.h>

#include <ns3/lte-net-device.h>

#include <ns3/packet-burst.h>

#include <ns3/uinteger.h>

#include <ns3/trace-source-accessor.h>

#include <ns3/pointer.h>

#include <ns3/enum.h>

#include <ns3/lte-amc.h>

#include <ns3/lte-enb-mac.h>

#include <ns3/lte-enb-net-device.h>

#include <ns3/lte-enb-rrc.h>

#include <ns3/lte-ue-net-device.h>

#include <ns3/lte-enb-phy.h>

#include <ns3/ff-mac-scheduler.h>

NS_LOG_COMPONENT_DEFINE ("LteEnbNetDevice");

namespace ns3 {

NS_OBJECT_ENSURE_REGISTERED ( LteEnbNetDevice);

uint16_t LteEnbNetDevice::m_cellIdCounter = 0;

TypeId LteEnbNetDevice::GetTypeId (void)

{

  static TypeId

  tid =

    TypeId ("ns3::LteEnbNetDevice")

    .SetParent<LteNetDevice> ()

    .AddConstructor<LteEnbNetDevice> ()

    .AddAttribute ("LteEnbRrc",

                   "The RRC associated to this EnbNetDevice",               

                   PointerValue (),

                   MakePointerAccessor (&LteEnbNetDevice::m_rrc),

                   MakePointerChecker <LteEnbRrc> ())

    ;

  return tid;

}

LteEnbNetDevice::LteEnbNetDevice (void)

{

  NS_LOG_FUNCTION (this);

  NS_FATAL_ERROR ("This constructor should not be called");

  InitLteEnbNetDevice ();

}

LteEnbNetDevice::LteEnbNetDevice (Ptr<Node> node, Ptr<LteEnbPhy> phy, Ptr<LteEnbMac> mac, Ptr<FfMacScheduler> sched, Ptr<LteEnbRrc> rrc)

{

  NS_LOG_FUNCTION (this);

  m_phy = phy;

  m_mac = mac;

  m_scheduler = sched;

  m_rrc = rrc;

  InitLteEnbNetDevice ();

  SetNode (node);

}

LteEnbNetDevice::~LteEnbNetDevice (void)

{

  NS_LOG_FUNCTION (this);

}

void

LteEnbNetDevice::DoDispose ()

{

  NS_LOG_FUNCTION (this);

  m_mac->Dispose ();

  m_mac = 0;

  m_scheduler->Dispose ();

  m_scheduler = 0;

  m_rrc->Dispose ();

  m_rrc = 0;

  m_phy->Dispose ();

  m_phy = 0;

  LteNetDevice::DoDispose ();

}

void

LteEnbNetDevice::InitLteEnbNetDevice (void)

{

  NS_LOG_FUNCTION (this);

  SetNode (0);

  if (GetPhy () == 0)

    {

      NS_LOG_DEBUG (this << "PHY NULL");

    }

  else

    {

      NS_LOG_DEBUG (this << "PHY ! NULL");

    }

  m_rrc->SetLteEnbCmacSapProvider (m_mac->GetLteEnbCmacSapProvider ());

  m_mac->SetLteEnbCmacSapUser (m_rrc->GetLteEnbCmacSapUser ());

  m_rrc->SetLteMacSapProvider (m_mac->GetLteMacSapProvider ());

  m_mac->SetFfMacSchedSapProvider (m_scheduler->GetFfMacSchedSapProvider ());

  m_mac->SetFfMacCschedSapProvider (m_scheduler->GetFfMacCschedSapProvider ());

  m_scheduler->SetFfMacSchedSapUser (m_mac->GetFfMacSchedSapUser ());

  m_scheduler->SetFfMacCschedSapUser (m_mac->GetFfMacCschedSapUser ());

  GetPhy ()->GetObject<LteEnbPhy> ()->SetLteEnbPhySapUser (m_mac->GetLteEnbPhySapUser ());

  m_mac->SetLteEnbPhySapProvider (GetPhy ()->GetObject<LteEnbPhy> ()->GetLteEnbPhySapProvider ());

  m_rrc->ConfigureCell (25, 25);

  NS_ASSERT_MSG (m_cellIdCounter < 65535, "max num eNBs exceeded");

  m_cellId = ++m_cellIdCounter;

  // WILD HACK -  should use the PHY SAP instead. Probably should handle this through the RRC

  GetPhy ()->GetObject<LteEnbPhy> ()->DoSetBandwidth (25,25);

  GetPhy ()->GetObject<LteEnbPhy> ()->DoSetCellId (m_cellId);

  Simulator::ScheduleNow (&LteEnbPhy::StartFrame, GetPhy ()->GetObject<LteEnbPhy> ());

}

Ptr<LteEnbMac>

LteEnbNetDevice::GetMac (void)

{

  NS_LOG_FUNCTION (this);

  return m_mac;

}

Ptr<LteEnbPhy>

LteEnbNetDevice::GetPhy (void) const

{

  NS_LOG_FUNCTION (this);

  return m_phy;

}

bool

LteEnbNetDevice::DoSend (Ptr<Packet> packet, const Mac48Address& source,

                      const Mac48Address& dest, uint16_t protocolNumber)

{

  NS_LOG_FUNCTION (this << source << dest << protocolNumber);

  NS_FATAL_ERROR ("IP connectivity not implemented yet");

  /*

   * The classification of traffic in DL is done by the PGW (not

   * by the eNB).

   * Hovever, the core network is not implemented yet.

   * For now the classification is managed by the eNB.

   */

  // if (protocolNumber == 2048)

  //   {

  //     // it is an IP packet

  //   }

  // if (protocolNumber != 2048 || bearer == 0)

  //   {

  //   }

  return true;

}

void

LteEnbNetDevice::DoReceive (Ptr<Packet> p)

{

  NS_LOG_FUNCTION (this << p);

  ForwardUp (p->Copy ());

}

void

LteEnbNetDevice::SendIdealPdcchMessage (void)

{

  NS_LOG_FUNCTION (this);

  /*

   * Get both PDCCH ideal message for UL and DL and

   * set assigned resources to UEs using

   * SendAssignedDLResources and SendAssignedULResources

   */

}

Ptr<LteEnbRrc>

LteEnbNetDevice::GetRrc ()

{

  return m_rrc;

}

uint16_t

LteEnbNetDevice::GetCellId ()

{

  return m_cellId;

}

} // namespace ns3