/*
 * Copyright (c) 2013 Universita' di Firenze, Italy
 *
 * 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: Tommaso Pecorella <tommaso.pecorella@unifi.it>
 */

#include "error-channel.h"

#include "simple-net-device.h"

#include "ns3/log.h"
#include "ns3/node.h"
#include "ns3/packet.h"
#include "ns3/simulator.h"

namespace ns3
{

NS_LOG_COMPONENT_DEFINE("ErrorChannel");

NS_OBJECT_ENSURE_REGISTERED(ErrorChannel);

TypeId
ErrorChannel::GetTypeId()
{
    static TypeId tid = TypeId("ns3::ErrorChannel")
                            .SetParent<SimpleChannel>()
                            .SetGroupName("Network")
                            .AddConstructor<ErrorChannel>();
    return tid;
}

ErrorChannel::ErrorChannel()
{
    m_jumpingTime = Seconds(0.5);
    m_jumping = false;
    m_jumpingState = 0;
    m_duplicateTime = Seconds(0.1);
    m_duplicate = false;
    m_duplicateState = 0;
}

void
ErrorChannel::SetJumpingTime(Time delay)
{
    m_jumpingTime = delay;
}

void
ErrorChannel::SetJumpingMode(bool mode)
{
    m_jumping = mode;
    m_jumpingState = 0;
}

void
ErrorChannel::SetDuplicateTime(Time delay)
{
    m_duplicateTime = delay;
}

void
ErrorChannel::SetDuplicateMode(bool mode)
{
    m_duplicate = mode;
    m_duplicateState = 0;
}

void
ErrorChannel::Send(Ptr<Packet> p,
                   uint16_t protocol,
                   Mac48Address to,
                   Mac48Address from,
                   Ptr<SimpleNetDevice> sender)
{
    NS_LOG_FUNCTION(p << protocol << to << from << sender);
    for (auto i = m_devices.begin(); i != m_devices.end(); ++i)
    {
        Ptr<SimpleNetDevice> tmp = *i;
        if (tmp == sender)
        {
            continue;
        }
        if (m_jumping)
        {
            if (m_jumpingState % 2)
            {
                Simulator::ScheduleWithContext(tmp->GetNode()->GetId(),
                                               Seconds(0),
                                               &SimpleNetDevice::Receive,
                                               tmp,
                                               p->Copy(),
                                               protocol,
                                               to,
                                               from);
            }
            else
            {
                Simulator::ScheduleWithContext(tmp->GetNode()->GetId(),
                                               m_jumpingTime,
                                               &SimpleNetDevice::Receive,
                                               tmp,
                                               p->Copy(),
                                               protocol,
                                               to,
                                               from);
            }
            m_jumpingState++;
        }
        else if (m_duplicate)
        {
            if (m_duplicateState % 2)
            {
                Simulator::ScheduleWithContext(tmp->GetNode()->GetId(),
                                               Seconds(0),
                                               &SimpleNetDevice::Receive,
                                               tmp,
                                               p->Copy(),
                                               protocol,
                                               to,
                                               from);
            }
            else
            {
                Simulator::ScheduleWithContext(tmp->GetNode()->GetId(),
                                               Seconds(0),
                                               &SimpleNetDevice::Receive,
                                               tmp,
                                               p->Copy(),
                                               protocol,
                                               to,
                                               from);
                Simulator::ScheduleWithContext(tmp->GetNode()->GetId(),
                                               m_duplicateTime,
                                               &SimpleNetDevice::Receive,
                                               tmp,
                                               p->Copy(),
                                               protocol,
                                               to,
                                               from);
            }
            m_duplicateState++;
        }
        else
        {
            Simulator::ScheduleWithContext(tmp->GetNode()->GetId(),
                                           Seconds(0),
                                           &SimpleNetDevice::Receive,
                                           tmp,
                                           p->Copy(),
                                           protocol,
                                           to,
                                           from);
        }
    }
}

void
ErrorChannel::Add(Ptr<SimpleNetDevice> device)
{
    m_devices.push_back(device);
}

std::size_t
ErrorChannel::GetNDevices() const
{
    return m_devices.size();
}

Ptr<NetDevice>
ErrorChannel::GetDevice(std::size_t i) const
{
    return m_devices[i];
}

} // namespace ns3