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

/*

 * Copyright (c) 2008,2009 IITP RAS

 *

 * 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: Kirill Andreev <andreev@iitp.ru>

 */

#include "ns3/core-module.h"

#include "ns3/simulator-module.h"

#include "ns3/node-module.h"

#include "ns3/helper-module.h"

#include "ns3/global-routing-module.h"

#include "ns3/wifi-module.h"

#include "ns3/mesh-module.h"

#include "ns3/mobility-module.h"

#include "ns3/dot11s-helper.h"

#include <iostream>

#include <sstream>

#include <fstream>

using namespace ns3;

using namespace dot11s;

NS_LOG_COMPONENT_DEFINE ("TestMeshScript");

class MeshTest

{

  public:

    /// Init test

    MeshTest ();

    /// Configure test from command line arguments

    void Configure (int argc, char ** argv);

    /// Run test

    int Run ();

  private:

    int       xSize;

    int       ySize;

    double    step;

    double    randomStart;

    double    totalTime;

    double    packetInterval;

    uint16_t  packetSize;

    uint32_t  nIfaces;

    bool      chan;

    bool      pcap;

    uint64_t  seed;

    /// List of network nodes

    NodeContainer nodes;

    /// List of all mesh point devices

    NetDeviceContainer meshDevices;

    //Addresses of interfaces:

    Ipv4InterfaceContainer interfaces;

    //InternetStackHelper stack;

    //Ipv4AddressHelper address;

  private:

    /// Create nodes and setup theis mobility

    void CreateNodes ();

    /// Install internet stack on nodes

    void InstallInternetStack ();

    /// Install applications

    void InstallApplication ();

    /// Print mesh devices diagnostics

    void Report ();  

};

MeshTest::MeshTest () :

  xSize (3),

  ySize (3),

  step (100.0),

  randomStart (0.1),

  totalTime (100.0),

  packetInterval (0.1),

  packetSize (1024),

  nIfaces (1),

  chan (true),

  pcap (false),

  seed (1)

{

}

void

MeshTest::Configure (int argc, char *argv[])

{

  CommandLine cmd;

  cmd.AddValue ("x-size", "Number of nodes in a row grid. [6]", xSize);

  cmd.AddValue ("y-size", "Number of rows in a grid. [6]", ySize);

  cmd.AddValue ("step",   "Size of edge in our grid, meters. [100 m]", step);

  cmd.AddValue ("start",  "Maximum random start delay, seconds. [0.1 s]", randomStart);

  cmd.AddValue ("time",  "Simulation time, seconds [100 s]", totalTime);

  cmd.AddValue ("packet-interval",  "Interval between packets, seconds [0.001 s]", packetInterval);

  cmd.AddValue ("packet-size",  "Size of packets", packetSize);

  cmd.AddValue ("interfaces", "Number of radio interfaces used by each mesh point. [1]", nIfaces);

  cmd.AddValue ("channels",   "Use different frequency channels for different interfaces. [0]", chan);

  cmd.AddValue ("pcap",   "Enable PCAP traces on interfaces. [0]", pcap);

  cmd.AddValue ("seed",   "Seed value", seed);

  cmd.Parse (argc, argv);

  NS_LOG_DEBUG ("Grid:" << xSize << "*" << ySize);

  NS_LOG_DEBUG ("Simulation time: " << totalTime << " s");

  SeedManager::SetSeed(seed);

}

void

MeshTest::CreateNodes ()

{ 

  nodes.Create (ySize*xSize);

  // Setting channel

  YansWifiPhyHelper wifiPhy = YansWifiPhyHelper::Default ();

  YansWifiChannelHelper wifiChannel = YansWifiChannelHelper::Default ();

  wifiPhy.SetChannel (wifiChannel.Create ());

  // Install mesh point devices & protocols

  MeshWifiHelper mesh;

  mesh.SetSpreadInterfaceChannels (chan);

  std::vector<uint32_t> roots;

  // Setup mobility

  MobilityHelper mobility;

  mobility.SetPositionAllocator ("ns3::GridPositionAllocator",

                                 "MinX", DoubleValue (0.0),

                                 "MinY", DoubleValue (0.0),

                                 "DeltaX", DoubleValue (step),

                                 "DeltaY", DoubleValue (step),

                                 "GridWidth", UintegerValue (xSize),

                                 "LayoutType", StringValue ("RowFirst"));

  mobility.SetMobilityModel ("ns3::ConstantPositionMobilityModel");

  mobility.Install (nodes);

  if (pcap)

    wifiPhy.EnablePcapAll (std::string ("mp-"));

}

void

MeshTest::InstallInternetStack ()

{

  InternetStackHelper stack;

  stack.Install (nodes);

  Ipv4AddressHelper address;

  address.SetBase ("10.1.1.0", "255.255.255.0");

  interfaces = address.Assign (meshDevices);

}

void

MeshTest::InstallApplication ()

{

  UdpEchoServerHelper echoServer (9);

  ApplicationContainer serverApps = echoServer.Install (nodes.Get (0));

  serverApps.Start (Seconds (0.0));

  serverApps.Stop (Seconds (totalTime));

  UdpEchoClientHelper echoClient (interfaces.GetAddress (0), 9);

  echoClient.SetAttribute ("MaxPackets", UintegerValue ((uint32_t)(totalTime*(1/packetInterval))));

  echoClient.SetAttribute ("Interval", TimeValue (Seconds (packetInterval)));

  echoClient.SetAttribute ("PacketSize", UintegerValue (packetSize));

  ApplicationContainer clientApps = echoClient.Install (nodes.Get (xSize*ySize-1));

  clientApps.Start (Seconds (0.0));

  clientApps.Stop (Seconds (totalTime));

}

int

MeshTest::Run ()

{

  CreateNodes ();

  InstallInternetStack ();

  InstallApplication ();

  Simulator::Schedule (Seconds(totalTime), & MeshTest::Report, this);

  Simulator::Stop (Seconds (totalTime));

  Simulator::Run ();

  Simulator::Destroy ();

  return 0;

}

void

MeshTest::Report ()

{

  NS_LOG_UNCOND("Report is here:");

  unsigned n (0);

  for (NetDeviceContainer::Iterator i = meshDevices.Begin (); i != meshDevices.End (); ++i, ++n)

  {

    std::ostringstream os;

    os << "mp-report-" << n << ".xml";

    std::cerr << "Printing mesh point device #" << n << " diagnostics to " << os.str () << "\n";

    std::ofstream of;

    of.open (os.str().c_str());

    if (! of.is_open ())

    {

      std::cerr << "Error: Can't open file " << os.str() << "\n";

      return;

    }

    MeshWifiHelper::Report (*i, of);

    of.close ();

  }

}

int

main (int argc, char *argv[])

{

  MeshTest t; 

  t.Configure (argc, argv);

  return t.Run();

}