// src/main.cc - Copyright 2005, 2006, University
//               of Padova, dept. of Pure and Applied
//               Mathematics
//
// This file is part of SGPEMv2.
//
// This is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// SGPEMv2 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 SGPEMv2; if not, write to the Free Software
// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA

#include "config.h"
#include "gettext.h"

#include "main.hh"
#include "parse_opts.hh"
#include "start_gui.hh"

#include "backend/history.hh"
#include "backend/static_schedulable.hh"
#include "backend/ready_queue.hh"
#include "backend/dynamic_schedulable.hh"
#include "backend/slice.hh"
#include "backend/static_process.hh"
#include "backend/policy.hh"
#include "backend/policy_parameters.hh"
#include "backend/global_preferences.hh"
#include "standard_io.hh"
#include "text_simulation.hh"

#include "smartp.tcc"

#include <glibmm/module.h>
#include <glibmm/ustring.h>

#include <algorithm>
#include <cassert>
#include <functional>
#include <iostream>
#include <string>
#include <vector>

using namespace std;
using namespace sgpem;
using namespace memory;
using Glib::ustring;


static void load_pyloader_plugin()
{
  // FIXME: this will need to be moved to an
  // appropriate PluginManager class in the backend,
  // and the Makefile fixed accordingly (partly done).
  using Glib::Module;

  // Leaks willingly:
  Module* pyloader = 0;

  GlobalPreferences& prefs = GlobalPreferences::get_instance();
  GlobalPreferences::dir_iterator it = prefs.modules_dir_begin();
  while(it != prefs.modules_dir_end())
  {
    std::string pyloader_path = Module::build_path(*it, "pyloader");
    pyloader = new Module(pyloader_path);
    if(*pyloader) break;
    else delete pyloader;
    it++;
  }

  if(!*pyloader)
    std::cerr << Module::get_last_error() << std::endl;

  // For the moment, we want to be sure it has been loaded:
  assert(*pyloader);
}

int
main(int argc, char* argv[])
{
  using namespace sgpem;

  // Set up gettext support
  setlocale(LC_ALL, "");
  bindtextdomain(PACKAGE, LOCALEDIR);
  textdomain(PACKAGE);

  // Set up Glib thread support
  Glib::thread_init();

  // Parses options and prepares vector with
  // filenames of documents to be opened
  vector<string> filenames;
  {
    int a_count  = argc;
    char** a_ptr = argv;
    parse_options(a_count, a_ptr);
    filenames.insert(filenames.begin(), a_ptr, a_ptr + a_count);
  }

  load_pyloader_plugin();

  // Create an INITIAL STATE
  StaticProcess p1("P1", 0, 5, 1);
  StaticProcess p2("P2", 0, 5, 2);
  StaticProcess p3("P3", 5, 3, 3);
  StaticProcess p4("P4", 6, 2, 3);
  StaticProcess p5("P5", 1, 2, 3);
  StaticProcess p6("P6", 10, 2, 1);

  DynamicSchedulable ss1(p1);
  DynamicSchedulable ss2(p2);
  DynamicSchedulable ss3(p3);
  DynamicSchedulable ss4(p4);
  DynamicSchedulable ss5(p5);
  DynamicSchedulable ss6(p6);

  ReadyQueue initial;
  initial.add_at_bottom(ss1);
  initial.add_at_bottom(ss2);
  initial.add_at_bottom(ss3);
  initial.add_at_bottom(ss4);
  initial.add_at_bottom(ss5);
  initial.add_at_bottom(ss6);
  History::get_instance().enqueue_slice(initial);

  Scheduler::get_instance(); // Forces initialization of scheduler.
  // Cross fingers (depends if PythonPolicyManager
  // static object has been initialized before?).

  //the textual simulation
  TextSimulation text_sim;
  History::get_instance().attach(&text_sim);

  //textual IO
  smart_ptr<IOManager> io(new StandardIO());
  text_sim.add_io_device(io);
  text_sim.update();

  //grafical IO
  start_gui(argc, argv, text_sim);

  //SMOKE-TEST for backend classes
  /* cout << "\n\n********************************";

   
   
   // ************** TEST HISTORY
   
   ReadyQueue l1;
   l1.add_at_top(ss1); l1.add_at_top(ss2);  l1.add_at_top(ss3);
   
   ReadyQueue l2;
   l2.add_at_top(ss4); l2.add_at_top(ss5);  l2.add_at_top(ss6);

   History h(History::get_instance());
   h.enqueue_slice(l1); //stato iniziale
   h.enqueue_slice(l2);
   
   smart_ptr<const sgpem::ReadyQueue> quale;
   
   quale = h.get_simulation_status_at(0); //stato iniziale
   
   cout << quale->get_item_at(0)->get_schedulable()->get_name();
   smart_ptr<const sgpem::DynamicSchedulable> quale2 = h.get_scheduled_at(1);
   cout << quale2->get_schedulable()->get_name();
     
   h.truncate_at(0);
   quale = h.get_simulation_status_at(0); //stato iniziale
   
   cout << bool(quale) << "  " << quale->get_item_at(0)->get_schedulable()->get_name();
    */
  /*
  smart_ptr<const sgpem::SimulationStatus> quale;

  quale = h.get_simulation_status_at(0);
  if (quale)  cout << "\n" << quale->get_running()->get_schedulable()->get_name(); else cout << "NO";
  quale = h.get_simulation_status_at(1);
  if (quale)  cout << "\n" << quale->get_running()->get_schedulable()->get_name(); else cout << "NO";
  quale = h.get_simulation_status_at(2);
  if (quale)  cout << "\n" << quale->get_running()->get_schedulable()->get_name(); else cout << "NO";

  h.truncate_at(2);

  smart_ptr<const sgpem::DynamicSchedulable> quale2;
  quale2 = h.get_scheduled_at(0);
  if (quale2) cout << "\n" << quale2->get_schedulable()->get_name(); else cout << "NO";
  quale2 = h.get_scheduled_at(1);
  if (quale2) cout << "\n" << quale2->get_schedulable()->get_name(); else cout << "NO";
  quale2 = h.get_scheduled_at(2);
  if (quale2) cout << "\n" << quale2->get_schedulable()->get_name(); else cout << "NO";
  */

  //************** TEST QUEUE
  /* cout << "\n\nTEST QUEUE\n";
   
   ReadyQueue sq;
   sq.add_at_bottom(ss1);
   sq.add_at_bottom(ss2);
   sq.add_at_bottom(ss3);
   cout << sq.get_item_at(0)->get_schedulable()->get_name() << "\n";
   cout << sq.get_item_at(1)->get_schedulable()->get_name() << "\n";
   cout << sq.get_item_at(2)->get_schedulable()->get_name() << "\n";
   sq.insert_at(2,0);
   cout << sq.get_item_at(0)->get_schedulable()->get_name() << "\n";
   cout << sq.get_item_at(1)->get_schedulable()->get_name() << "\n";
   cout << sq.get_item_at(2)->get_schedulable()->get_name() << "\n";

   cout << "\n\nTEST POLICYPARAMETERS\n";
   PolicyParameters pp;
   pp.register_int("ciao", 0, 100, true, 50);
   pp.set_int("ciao",1);
   cout << pp.get_int("ciao");
   
   cout << "\n\n";
   */

  return 0;
}