/**
 * @file RootCoordinator.hpp
 * @author The ARTIS Development Team
 * See the AUTHORS or Authors.txt file
 */

/*
 * ARTIS - the multimodeling and simulation environment
 * This file is a part of the ARTIS environment
 *
 * Copyright (C) 2013-2018 ULCO http://www.univ-littoral.fr
 *
 * This program 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 3 of the License, or
 * (at your option) any later version.
 *
 * 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, see <http://www.gnu.org/licenses/>.
 */

#ifndef COMMON_ROOT_COORDINATOR
#define COMMON_ROOT_COORDINATOR

#include <artis-star/common/observer/Observer.hpp>
#include <artis-star/common/observer/View.hpp>
#include <artis-star/common/Parameters.hpp>

#include <sstream>
#include <string>

namespace artis { namespace common {

template < class Time, class Coordinator >
class RootCoordinator
{
public :
    RootCoordinator(
        const typename Time::type& t_start,
        const typename Time::type& t_max,
        const std::string& root_name,
        const typename Coordinator::parameters_type& parameters,
        const typename Coordinator::graph_parameters_type& graph_parameters) :
        _root(root_name, parameters, graph_parameters), _observer(&_root),
        _t_max(t_max), _tn(t_start)
    { }

    RootCoordinator(const typename Time::type& t_start,
                    const typename Time::type& t_max,
                    const std::string& root_name,
                    const typename Coordinator::parameters_type& parameters) :
        _root(root_name, parameters, NoParameters()), _observer(&_root),
        _t_max(t_max), _tn(t_start)
    { }

    RootCoordinator(const typename Time::type& t_start,
                    const typename Time::type& t_max,
                    const std::string& root_name) :
        _root(root_name, NoParameters(), NoParameters()), _observer(&_root),
        _t_max(t_max), _tn(t_start)
    { }

    virtual ~RootCoordinator()
    { }

    void attachView(const std::string& name, observer::View < Time >* view)
    { _observer.attachView(name, view); }

    const observer::Observer < Time >& observer() const
    { return _observer; }

    void run()
    {
        _observer.init();
        _tn = _root.start(_tn);
        while (_tn <= _t_max) {
            _root.output(_tn);
            _tn = _root.transition(_tn);
            _observer.observe(_tn);
        }
    }

    std::string to_string() const
    {
        std::ostringstream ss;

        ss << _root.to_string(0);
        return ss.str();
    }

private :
    Coordinator                 _root;
    observer::Observer < Time > _observer;
    typename Time::type         _t_max;
    typename Time::type         _tn;
};

} } // namespace artis common

#endif