// src/schedulables_tree_widget.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 "schedulables_tree_widget.hh"
#include "templates/sequences.tcc"
#include "backend/history.hh"
#include "backend/simulation.hh"
#include "backend/process.hh"

#include <iostream>
#include <gtk/gtk.h>
#include <gtkmm/entry.h>
#include <gtkmm/spinbutton.h>


using namespace sgpem;
using namespace Gtk;
using namespace Glib;
using Gnome::Glade::Xml;

SchedulablesTreeWidget::SchedulablesTreeWidget() :
  _add_process_dialog_glade(Xml::create(GLADEDIR "/add-process-dialog.glade"))
{
  _columns.add(_main_column);
  _columns.add(_handles_column);
  _model = TreeStore::create(_columns);
  
  set_model(_model);

/** JUST A BIT OF DATA FOR TESTING **/
  
 //Gtk::TreeModel::Row row1 = *(_model->append());
 //row1[_main_column] = ustring("ciccio");

 // Gtk::TreeModel::Row row2 = *(_model->append());
 // row2[_main_column] = ustring("pippo");

  append_column("schedulables", _main_column);
  //invisible
  //  append_column("handles", _handles_column);

/** POPUP MENU **/
  
  _action_group = Gtk::ActionGroup::create();

//  _action_group->add( Gtk::Action::create("ContextMenu", "Schedulables") );
//  _action_group->add( Gtk::Action::create("Add Process", Gtk::Stock::NEW),
//      sigc::mem_fun(*this, &SchedulablesTreeWidget::on_action_file_new) );
  _action_group->add( Gtk::Action::create("AddProcess", "Add Process"),
      sigc::mem_fun(*this, &SchedulablesTreeWidget::_on_add_process) );
  //_action_group->add( Gtk::Action::create("Quit", Gtk::Stock::QUIT),
  //    sigc::mem_fun(*this, &SchedulablesTreeWidget::on_action_file_quit) );   

  _UIManager = Gtk::UIManager::create();
  _UIManager->insert_action_group(_action_group);

  Glib::ustring ui_info = 
        "<ui>"
        "  <popup name='PopupMenu'>"
//        "    <menuitem action='ContextMenu'/>"
        "    <menuitem action='AddProcess'/>"
        "  </popup>"
        "</ui>";

  _UIManager->add_ui_from_string(ui_info);
  _menu = dynamic_cast<Gtk::Menu*>(_UIManager->get_widget("/PopupMenu"));

/** DIALOGS **/
  _add_process_dialog_glade->get_widget("AddProcessDialog", _add_process_dialog);
  //FIXME why do I need to call this? Is it reasonable?
  _add_process_dialog->hide();
  
  set_headers_visible(false);

  Simulation::get_instance().get_history().attach(*this);
}

SchedulablesTreeWidget::~SchedulablesTreeWidget()
{
  Simulation::get_instance().get_history().detach(*this);
}

bool 
SchedulablesTreeWidget::on_button_press_event(GdkEventButton* event)
{
  TreeView::on_button_press_event(event);
  
  if( (event->type == GDK_BUTTON_PRESS) && (event->button == 3) )
  {
    _menu->popup(event->button, event->time);
    return true; //It has been handled.
  }
  else
    return false;
}

void
SchedulablesTreeWidget::update(const History& history)
{
  const Environment::Processes& processes = 
    Simulation::get_instance().get_history().get_last_environment().get_processes();

  _model->clear();
  
  for(unsigned int i = 0; i < processes.size(); ++i)
  {
    Process& p = *processes[i];

    TreeModel::Row row = *(_model->append());
    row[_main_column] = p.get_name();
    row[_handles_column] = &p;
  }
    
}

void
SchedulablesTreeWidget::_on_add_process()
{
  if(_add_process_dialog->run() == RESPONSE_OK)
  {
    Entry* name_entry;
    SpinButton* arrival_time_spin;
    SpinButton* base_priority_spin;
    
    _add_process_dialog_glade->get_widget("Name.Entry", name_entry);
    _add_process_dialog_glade->get_widget("ArrivalTime.Spin", arrival_time_spin);
    _add_process_dialog_glade->get_widget("BasePriority.Spin", base_priority_spin);

    Simulation::get_instance().get_history().add_process(name_entry->get_text(), 
                                                         arrival_time_spin->get_value_as_int(), 
							 base_priority_spin->get_value_as_int());
  }
  
  _add_process_dialog->hide();
}