// src/testsuite/test-stepforward.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

/* This executable tests for workingness of the stepForward method,
 * and nothing else. */



#include <glibmm/module.h> // ??
#include <cassert>
#include <string>
#include "config.h"
#include "gettext.h"
#include "glibmm/ustring.h"
#include <vector>
#include <iostream>
#include "backend/process.hh"
#include "backend/observed_subject.hh"
#include "backend/schedulable_list.hh"
#include "backend/schedulable_status.hh"
#include "templates/smartp.hh"

#include "scheduler.hh"
#include "user_interrupt_exception.hh"

#include <iostream>


namespace sgpem
{
    /** An hard-coded Priority Round Robin policy
     * It's actually called PRRPolicy, altough my personal taste would have suggested 
     * naming it 
     * Prioriy-Reliant Roughly-Realized Recently-Reimplemented Round-Robin Policy, 
     * i.e. PRRRRRRR-Policy.
     * it adds a new constructor taking the quantum size (time slice)*/

    class PRRPolicy : public Policy
    {
        public:

        Policy()
        {
            _instance = this;
        }

        Policy(int quantum) : _quantum(quantum)
        {
            _instance = this;
        }

        static Policy& get_instance()
        {
            if(!_instance) _instance = new Policy(3); // quantum size
            return *_instance;
        }

        virtual ~Policy()
        {
        }

        virtual void configure()
        {
        }

        virtual void sort_queue(Scheduler::event event) const throw(UserInterruptException)
        { // here a lot of fun, exactly O(n^2) fun!
            SchedulableList sl = History.get_instance().get_simulation_status_at(get_current_time());
            for (int i = 0; i < sl.size(); i++)
                {
                for (int j = 0; j < sl.size()-1; j++)
                    {
                        if (sl.get_item_at(j).get_schedulable().get_priority() < sl.get_item_at(j+1).get_schedulable().get_priority())
                            {
                                sl.swap(j, j+1);
                            }
                    }

                }
        }

        int get_id() const
        {
            return 42;
        }

        virtual Glib::ustring get_description()
        {
            return "42";
        }
        virtual bool is_pre_emptive() const throw(UserInterruptException)
        {
            return 1;
        }
        virtual int get_time_slice() const throw(UserInterruptException)
        {
            return _quantum;
        }

        PolicyParameters& get_parameters()
        {
            return _parameters;
        }


        protected:

        PolicyParameters _parameters;
        int _id;
        int _quantum;

        private:

        static Policy* _instance;
    };

    Policy*
    PRRPolicy::_instance = NULL;




    // A PolicyManager stub
    class PolicyManager
    {
        public:

        PolicyManager();
        virtual ~PolicyManager();
        virtual Policy& get_policy()
        {
            return PRRPolicy.get_instance();
        }
        virtual void init()
        {
        }
        static PolicyManager& get_registered_manager();

        private:

        static PolicyManager* _registered;
    };

    PolicyManager*
    PolicyManager::_registered = NULL;

    PolicyManager::PolicyManager()
    {
        _registered = this;
    }


    PolicyManager::~PolicyManager()
    {
        if(_registered == this) _registered = NULL;
    }

    PolicyManager& 
    PolicyManager::get_registered_manager()
    {
        return *_registered;
    }



    // a History stub, should only save the last state included. but...
   class History : public ObservedSubject 
   {
     public:

	memory::smart_ptr<sgpem::SchedulableStatus> get_scheduled_at(int time) const {}
	memory::smart_ptr<sgpem::SchedulableList> get_simulation_status_at(int time) const;
	int	get_current_time() const {return _total_time_elapsed;}
	void	enqueue_slice(const sgpem::SchedulableList& status);
	void	truncate_at(int instant) {}
	static History&	get_instance();	
     private:
	History(int);			//private constructor. The parameter is discarded
	static History  _instance;
	int             _total_time_elapsed;
	std::vector<sgpem::Slice>	_slices;
  };
     History&
     History::get_instance()

        {
            if(!_instance) _instance = new Policy(3); // quantum size
            return *_instance;
        }




} //~ namespace sgpem



// this class should invoke the Scheduler Stepforward method.
class StepForwardTester
{


}

// from here and further until the bottom, all to throw away I suppose

int
main(int argc, char** argv) {

    using namespace sgpem;
    using Glib::Module;


    std::string command(ERERERT); // the sequence of commands to test

    // sets up the test data
    Process p1("P1", 1,5,1);
    Process p2("P2", 5,55,2);
    Process p3("P3", 36,30,3);
    Process p4("P4", 4,26,3);
    Process p5("P5", 15,200,3);
    Process p6("P6", 6,250,1);
    Process p7("P7", 8,42,15);
    Process p8("P8", 8,56,1);
    Process p9("P9", 9,42,1);
    Process p10("PA", 12,42,1);
    Process p11("PB", 106,42,1);
    Process p12("PC", 100,42,1);
    Process p13("PD", 29,42,18);
    Process p14("PE", 0,42,1);
    Process p15("PF", 2,88,1);
    Process p16("PG", 3666,9,1);
    Process p17("PH", 5,72,10);
    Process p18("PJ", 6,26,1);
    Process p19("PK", 10,24,17);
    Process p20("PK2", 11,34,67); // not used!

    SchedulableStatus ss1(p1);
    SchedulableStatus ss2(p2);
    SchedulableStatus ss3(p3);
    SchedulableStatus ss4(p4);
    SchedulableStatus ss5(p5);
    SchedulableStatus ss6(p6);
    SchedulableStatus ss7(p7);
    SchedulableStatus ss8(p8);
    SchedulableStatus ss9(p9);
    SchedulableStatus ss10(p10);
    SchedulableStatus ss11(p11);
    SchedulableStatus ss12(p12);
    SchedulableStatus ss13(p13);
    SchedulableStatus ss14(p14);
    SchedulableStatus ss15(p15);
    SchedulableStatus ss16(p16);
    SchedulableStatus ss17(p17);
    SchedulableStatus ss18(p18);
    SchedulableStatus ss19(p19); // not used!

    SchedulableList 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);
    initial.add_at_bottom(ss7);
    initial.add_at_bottom(ss8);
    initial.add_at_bottom(ss9);
    initial.add_at_bottom(ss10);
    initial.add_at_bottom(ss11);
    initial.add_at_bottom(ss12);
    initial.add_at_bottom(ss13);
    initial.add_at_bottom(ss14);
    initial.add_at_bottom(ss15);
    initial.add_at_bottom(ss16);
    initial.add_at_bottom(ss17);
    initial.add_at_bottom(ss18);

    HistoryTester HT(initial);
    HT.test("ERERERERTTTETRERERETETTTTTTTTTTTTTT");


    exit(0);
}