/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/*
 * Copyright (c) 2009 University of Washington
 *
 * 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: Leonard Tracy <lentracy@gmail.com>
 */

#include "ns3/trace-source-accessor.h"
#include "ns3/traced-callback.h"
#include "ns3/pointer.h"
#include "ns3/node.h"
#include "ns3/assert.h"
#include "uan-net-device.h"
#include "uan-phy.h"
#include "uan-mac.h"
#include "uan-channel.h"
#include "uan-transducer.h"
#include "ns3/log.h"

NS_LOG_COMPONENT_DEFINE ("UanNetDevice");

namespace ns3 {

NS_OBJECT_ENSURE_REGISTERED (UanNetDevice);

UanNetDevice::UanNetDevice ()
  : NetDevice (),
    m_mtu (64000),
    m_cleared (false)
{
}

UanNetDevice::~UanNetDevice ()
{
}

void
UanNetDevice::Clear ()
{
  if (m_cleared)
    {
      return;
    }
  m_cleared = true;
  m_node = 0;
  if (m_channel)
    {
      m_channel->Clear ();
      m_channel = 0;
    }
  if (m_mac)
    {
      m_mac->Clear ();
      m_mac = 0;
    }
  if (m_phy)
    {
      m_phy->Clear ();
      m_phy = 0;
    }
  if (m_trans)
    {
      m_trans->Clear ();
      m_trans = 0;
    }
}

void
UanNetDevice::DoDispose ()
{
  Clear ();
  NetDevice::DoDispose ();
}

TypeId
UanNetDevice::GetTypeId ()
{


  static TypeId tid = TypeId ("ns3::UanNetDevice")
    .SetParent<NetDevice> ()
    .AddAttribute ("Channel", "The channel attached to this device",
                   PointerValue (),
                   MakePointerAccessor (&UanNetDevice::DoGetChannel, &UanNetDevice::SetChannel),
                   MakePointerChecker<UanChannel> ())
    .AddAttribute ("Phy", "The PHY layer attached to this device.",
                   PointerValue (),
                   MakePointerAccessor (&UanNetDevice::GetPhy, &UanNetDevice::SetPhy),
                   MakePointerChecker<UanPhy> ())
    .AddAttribute ("Mac", "The MAC layer attached to this device.",
                   PointerValue (),
                   MakePointerAccessor (&UanNetDevice::GetMac, &UanNetDevice::SetMac),
                   MakePointerChecker<UanMac> ())
    .AddAttribute ("Transducer", "The Transducer attached to this device.",
                   PointerValue (),
                   MakePointerAccessor (&UanNetDevice::GetTransducer,
                                        &UanNetDevice::SetTransducer),
                   MakePointerChecker<UanTransducer> ())
    .AddTraceSource ("Rx", "Received payload from the MAC layer.",
                     MakeTraceSourceAccessor (&UanNetDevice::m_rxLogger))
    .AddTraceSource ("Tx", "Send payload to the MAC layer.",
                     MakeTraceSourceAccessor (&UanNetDevice::m_txLogger))
  ;
  return tid;
}

void
UanNetDevice::SetMac (Ptr<UanMac> mac)
{
  if (mac != 0)
    {
      m_mac = mac;
      NS_LOG_DEBUG ("Set MAC");

      if (m_phy != 0)
        {
          m_phy->SetMac (mac);
          m_mac->AttachPhy (m_phy);
          NS_LOG_DEBUG ("Attached MAC to PHY");
        }
      m_mac->SetForwardUpCb (MakeCallback (&UanNetDevice::ForwardUp, this));
    }

}

void
UanNetDevice::SetPhy (Ptr<UanPhy> phy)
{
  if (phy != 0)
    {
      m_phy = phy;
      m_phy->SetDevice (Ptr<UanNetDevice> (this));
      NS_LOG_DEBUG ("Set PHY");
      if (m_mac != 0)
        {
          m_mac->AttachPhy (phy);
          m_phy->SetMac (m_mac);
          NS_LOG_DEBUG ("Attached PHY to MAC");
        }
      if (m_trans != 0)
        {
          m_phy->SetTransducer (m_trans);
          NS_LOG_DEBUG ("Added PHY to trans");
        }

    }
}

void
UanNetDevice::SetChannel (Ptr<UanChannel> channel)
{
  if (channel != 0)
    {
      m_channel = channel;
      NS_LOG_DEBUG ("Set CHANNEL");
      if (m_trans != 0)
        {

          m_channel->AddDevice (this, m_trans);
          NS_LOG_DEBUG ("Added self to channel device list");
          m_trans->SetChannel (m_channel);
          NS_LOG_DEBUG ("Set Transducer channel");
        }
      if (m_phy != 0 )
        {
          m_phy->SetChannel (channel);
        }
    }
}

Ptr<UanChannel>
UanNetDevice::DoGetChannel (void) const
{
  return m_channel;

}
Ptr<UanMac>
UanNetDevice::GetMac () const
{
  return m_mac;
}

Ptr<UanPhy>
UanNetDevice::GetPhy () const
{
  return m_phy;
}

void
UanNetDevice::SetIfIndex (uint32_t index)
{
  m_ifIndex = index;
}

uint32_t
UanNetDevice::GetIfIndex () const
{
  return m_ifIndex;
}

Ptr<Channel>
UanNetDevice::GetChannel () const
{
  return m_channel;
}

Address
UanNetDevice::GetAddress () const
{
  return m_mac->GetAddress ();
}

bool
UanNetDevice::SetMtu (uint16_t mtu)
{
  // TODO:  Check this in MAC
  NS_LOG_WARN ("UanNetDevice:  MTU is not implemented");
  m_mtu = mtu;
  return true;
}

uint16_t
UanNetDevice::GetMtu () const
{
  return m_mtu;
}

bool
UanNetDevice::IsLinkUp () const
{
  return  (m_linkup && (m_phy != 0));
}

bool
UanNetDevice::IsBroadcast () const
{
  return true;
}

Address
UanNetDevice::GetBroadcast () const
{
  return m_mac->GetBroadcast ();
}

bool
UanNetDevice::IsMulticast () const
{
  return false;
}

Address
UanNetDevice::GetMulticast (Ipv4Address multicastGroup) const
{
  NS_FATAL_ERROR ("UanNetDevice does not support multicast");
  return m_mac->GetBroadcast ();
}

Address
UanNetDevice::GetMulticast (Ipv6Address addr) const
{
  NS_FATAL_ERROR ("UanNetDevice does not support multicast");
  return m_mac->GetBroadcast ();
}

bool
UanNetDevice::IsBridge (void) const
{
  return false;
}
bool
UanNetDevice::IsPointToPoint () const
{
  return false;
}

bool
UanNetDevice::Send (Ptr<Packet> packet, const Address &dest, uint16_t protocolNumber)
{
  return m_mac->Enqueue (packet, dest, protocolNumber);
}

bool
UanNetDevice::SendFrom (Ptr<Packet> packet, const Address& source, const Address& dest, uint16_t protocolNumber)
{
  // Not yet implemented
  NS_ASSERT_MSG (0, "Not yet implemented");
  return false;
}
Ptr<Node>
UanNetDevice::GetNode () const
{
  return m_node;
}

void
UanNetDevice::SetNode (Ptr<Node> node)
{
  m_node = node;
}

bool
UanNetDevice::NeedsArp () const
{
  return false;
}

void
UanNetDevice::SetReceiveCallback (NetDevice::ReceiveCallback cb)
{
  m_forwardUp = cb;
}

void
UanNetDevice::ForwardUp (Ptr<Packet> pkt, const UanAddress &src)
{
  NS_LOG_DEBUG ("Forwarding packet up to application");
  m_rxLogger (pkt, src);
  m_forwardUp (this, pkt, 0, src);

}

Ptr<UanTransducer>
UanNetDevice::GetTransducer (void) const
{
  return m_trans;
}
void
UanNetDevice::SetTransducer (Ptr<UanTransducer> trans)
{

  if (trans != 0)
    {
      m_trans = trans;
      NS_LOG_DEBUG ("Set Transducer");
      if (m_phy != 0)
        {
          m_phy->SetTransducer (m_trans);
          NS_LOG_DEBUG ("Attached Phy to transducer");
        }

      if (m_channel != 0)
        {
          m_channel->AddDevice (this, m_trans);
          m_trans->SetChannel (m_channel);
          NS_LOG_DEBUG ("Added self to channel device list");
        }
    }

}

void
UanNetDevice::AddLinkChangeCallback (Callback<void> callback)
{
  m_linkChanges.ConnectWithoutContext (callback);
}


void
UanNetDevice::SetPromiscReceiveCallback (PromiscReceiveCallback cb)
{
  // Not implemented yet
  NS_ASSERT_MSG (0, "Not yet implemented");
}

bool
UanNetDevice::SupportsSendFrom (void) const
{
  return false;
}

void
UanNetDevice::SetAddress (Address address)
{
  NS_ASSERT_MSG (0, "Tried to set MAC address with no MAC");
  m_mac->SetAddress (UanAddress::ConvertFrom (address));
}

} // namespace ns3