/**
 * @file tests/qss/models.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) 2013-2019 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 TESTS_QSS_MODELS_HPP
#define TESTS_QSS_MODELS_HPP 1

#include <artis-star/common/time/DoubleTime.hpp>
#include <artis-star/common/utils/Trace.hpp>

#include <artis-star/kernel/pdevs/qss/Derivative.hpp>

namespace artis {
    namespace tests {
        namespace qss {

            class Constant : public artis::pdevs::qss::Derivative<common::DoubleTime, Constant> {
            public:
                Constant(const std::string& name,
                        const artis::pdevs::Context<common::DoubleTime, Constant, artis::common::NoParameters>& context)
                        :
                        artis::pdevs::qss::Derivative<common::DoubleTime, Constant>(name,
                                context) { }

                ~Constant() override = default;

                double compute() const override { return 0.5; }
            };

            struct ParabolaParameters {
                double alpha;
            };

            class Parabola
                    : public artis::pdevs::qss::Derivative<common::DoubleTime, Parabola, ParabolaParameters> {
            public:
                Parabola(const std::string& name,
                        const artis::pdevs::Context<common::DoubleTime, Parabola, ParabolaParameters>& context)
                        :
                        artis::pdevs::qss::Derivative<common::DoubleTime, Parabola, ParabolaParameters>(
                                name,
                                context), _alpha(context.parameters().alpha)
                {
                    internal("X", &Parabola::_x);
                }

                ~Parabola() override = default;

                double compute() const override { return _alpha * _x; }

            private:
                double _alpha;

                double _x;
            };

            struct PreyPredatorParameters {
                double a;
                double b;
                double d;
                double e;
            };

            class Predator
                    : public artis::pdevs::qss::Derivative<common::DoubleTime, Predator, PreyPredatorParameters> {
            public:
                unsigned int IN_X;

                Predator(const std::string& name,
                        const artis::pdevs::Context<common::DoubleTime, Predator, PreyPredatorParameters>& context)
                        :
                        artis::pdevs::qss::Derivative<common::DoubleTime, Predator, PreyPredatorParameters>(
                                name,
                                context), _b(context.parameters().b), _d(context.parameters().d),
                        _e(context.parameters().e)
                {
                    internal("Y", &Predator::_y);
                    IN_X = external("X", &Predator::_x);
                }

                ~Predator() override = default;

                double compute() const override { return _b * _d * _x * _y - _e * _y; }

            private:
                // parameters
                double _b;
                double _d;
                double _e;

                // state
                double _x;
                double _y;
            };

            class Prey
                    : public artis::pdevs::qss::Derivative<common::DoubleTime, Prey, PreyPredatorParameters> {
            public:
                unsigned int IN_Y;

                Prey(const std::string& name,
                        const artis::pdevs::Context<common::DoubleTime, Prey, PreyPredatorParameters>& context)
                        :
                        artis::pdevs::qss::Derivative<common::DoubleTime, Prey, PreyPredatorParameters>(
                                name,
                                context), _a(context.parameters().a), _b(context.parameters().b)
                {
                    internal("X", &Prey::_x);
                    IN_Y = external("Y", &Prey::_y);
                }

                ~Prey() override = default;

                double compute() const override { return _a * _x - _b * _y * _x; }

            private:
                // parameters
                double _a;
                double _b;

                // state
                double _x;
                double _y;
            };

        }
    }
} // namespace artis tests qss

#endif