// 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 "templates/smartp.hh"
#include "backend/history.hh"
#include "backend/static_schedulable.hh"
#include "backend/schedulable_queue.hh"
#include "backend/schedulable_status.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 <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::dir_iterator it = GlobalPreferences::instance().modules_dir_begin();
    while(it != GlobalPreferences::instance().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);
  
  SchedulableStatus ss1(p1);
  SchedulableStatus ss2(p2);
  SchedulableStatus ss3(p3);
  SchedulableStatus ss4(p4);
  SchedulableStatus ss5(p5);	
  SchedulableStatus ss6(p6);
  
  SchedulableQueue 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
  
  SchedulableQueue l1;
  l1.add_at_top(ss1);	l1.add_at_top(ss2);		l1.add_at_top(ss3);
  
  SchedulableQueue 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::SchedulableQueue> quale;
  
  quale = h.get_simulation_status_at(0);	//stato iniziale
 	
  cout << quale->get_item_at(0)->get_schedulable()->get_name();
  smart_ptr<const sgpem::SchedulableStatus> 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::SchedulableStatus> 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";
  
  SchedulableQueue 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;
}