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

 /*

  * Copyright (c) 2006 INRIA

  *

  * 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: Mathieu Lacage <mathieu.lacage@sophia.inria.fr>

  */

 #include "ns3/simulator-module.h"

 #include "ns3/core-module.h"

 #include <iostream>

 #include <fstream>

 #include <vector>

 #include <string.h>

 using namespace ns3;

 bool g_debug = false;

 class Bench 

 {

 public:

   Bench ();

   void ReadDistribution (std::istream &istream);

   void SetTotal (uint32_t total);

   void RunBench (void);

 private:

   void Cb (void);

   std::vector<uint64_t> m_distribution;

   std::vector<uint64_t>::const_iterator m_current;

   uint32_t m_n;

   uint32_t m_total;

 };

 Bench::Bench ()

   : m_n (0),

     m_total (0)

 {}

 void 

 Bench::SetTotal (uint32_t total)

 {

   m_total = total;

 }

 void

 Bench::ReadDistribution (std::istream &input)

 {

   double data;

   while (!input.eof ()) 

     {

       if (input >> data) 

         {

           uint64_t ns = (uint64_t) (data * 1000000000);

           m_distribution.push_back (ns);

         } 

       else 

         {

           input.clear ();

           std::string line;

           input >> line;

         }

     }

 }

 void

 Bench::RunBench (void) 

 {

   SystemWallClockMs time;

   double init, simu;

   time.Start ();

   for (std::vector<uint64_t>::const_iterator i = m_distribution.begin ();

        i != m_distribution.end (); i++) 

     {

       Simulator::Schedule (NanoSeconds (*i), &Bench::Cb, this);

     }

   init = time.End ();

   init /= 1000;

   m_current = m_distribution.begin ();

   time.Start ();

   Simulator::Run ();

   simu = time.End ();

   simu /= 1000;

   std::cout <<

       "init n=" << m_distribution.size () << ", time=" << init << "s" << std::endl <<

       "simu n=" << m_n << ", time=" <<simu << "s" << std::endl <<

       "init " << ((double)m_distribution.size ()) / init << " insert/s, avg insert=" <<

       init / ((double)m_distribution.size ())<< "s" << std::endl <<

       "simu " << ((double)m_n) / simu<< " hold/s, avg hold=" << 

       simu / ((double)m_n) << "s" << std::endl

       ;

 }

 void

 Bench::Cb (void)

 {

   if (m_n > m_total) 

     {

       return;

     }

   if (m_current == m_distribution.end ()) 

     {

       m_current = m_distribution.begin ();

     }

   if (g_debug) 

     {

       std::cerr << "event at " << Simulator::Now ().GetSeconds () << "s" << std::endl;

     }

   Simulator::Schedule (NanoSeconds (*m_current), &Bench::Cb, this);

   m_current++;

   m_n++;

 }

 void

 PrintHelp (void)

 {

   std::cout << "bench-simulator filename [options]"<<std::endl;

   std::cout << "  filename: a string which identifies the input distribution. \"-\" represents stdin." << std::endl;

   std::cout << "  Options:"<<std::endl;

   std::cout << "      --list: use std::list scheduler"<<std::endl;

   std::cout << "      --map: use std::map cheduler"<<std::endl;

   std::cout << "      --heap: use Binary Heap scheduler"<<std::endl;

   std::cout << "      --debug: enable some debugging"<<std::endl;

 }

 int main (int argc, char *argv[])

 {

   char const *filename = argv[1];

   std::istream *input;

   uint32_t n = 1;

   uint32_t total = 20000;

   if (argc == 1)

     {

       PrintHelp ();

       return 0;

     }

   argc-=2;

   argv+= 2;

   if (strcmp (filename, "-") == 0) 

     {

       input = &std::cin;

     } 

   else 

     {

       input = new std::ifstream (filename);

     }

   while (argc > 0) 

     {

       ObjectFactory factory;

       if (strcmp ("--list", argv[0]) == 0) 

         {

           factory.SetTypeId ("ns3::ListScheduler");

           Simulator::SetScheduler (factory);

         } 

       else if (strcmp ("--heap", argv[0]) == 0) 

         {

           factory.SetTypeId ("ns3::HeapScheduler");

           Simulator::SetScheduler (factory);

         } 

       else if (strcmp ("--map", argv[0]) == 0) 

         {

           factory.SetTypeId ("ns3::HeapScheduler");

           Simulator::SetScheduler (factory);

         } 

       else if (strcmp ("--calendar", argv[0]) == 0)

         {

           factory.SetTypeId ("ns3::CalendarScheduler");

           Simulator::SetScheduler (factory);

         }

       else if (strcmp ("--debug", argv[0]) == 0) 

         {

           g_debug = true;

         } 

       else if (strncmp ("--total=", argv[0], strlen("--total=")) == 0) 

         {

           total = atoi (argv[0]+strlen ("--total="));

         } 

       else if (strncmp ("--n=", argv[0], strlen("--n=")) == 0) 

         {

           n = atoi (argv[0]+strlen ("--n="));

         } 

       argc--;

       argv++;

   }

   Bench *bench = new Bench ();

   bench->ReadDistribution (*input);

   bench->SetTotal (total);

   for (uint32_t i = 0; i < n; i++)

     {

       bench->RunBench ();

     }

   return 0;

 }