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//  Manages the engine, clutch, transmission and differential.

//

//  Copyright (C) 2001--2002 Sam Varner

//

//  This file is part of Vamos Automotive Simulator.

//

//  Vamos 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.

//

//  Vamos 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 Vamos.  If not, see <http://www.gnu.org/licenses/>.



#ifndef _DRIVETRAIN_H_

#define _DRIVETRAIN_H_



#include "../geometry/Constants.hpp"

#include "Clutch.hpp"

#include "Differential.hpp"

#include "Engine.hpp"

#include "Transmission.hpp"



#include <memory>



namespace Vamos_Body

{

/// The drivetrain manages the engine, clutch, transmission and differential.

class Drivetrain

{

public:

    Drivetrain(Engine *engine, Clutch *clutch, Transmission *transmission,

               Differential *differential);



    /// Process the input parameters.

    void input(double gas, double clutch, double left_wheel_speed, double right_wheel_speed);

    void find_forces();

    /// Advance the drivetrain in time.

    void propagate(double time);

    void rewind();

    void reset();

    std::shared_ptr<Engine> engine() { return mp_engine; }

    Transmission& transmission() { return *mp_transmission; }

    Clutch& clutch() { return *mp_clutch; }

    /// @return the torque for a driven wheel.

    double torque(Vamos_Geometry::Direction side) const;

    void set_auto_neutral(bool state) { m_auto_neutral = state; }



private:

    std::shared_ptr<Engine> mp_engine; ///< Also a particle in the body.

    std::unique_ptr<Clutch> mp_clutch;

    std::unique_ptr<Transmission> mp_transmission;

    std::unique_ptr<Differential> mp_differential;

    /// The throttle position.

    double m_gas = 0.0;

    /// If true, shift to neutral instead of stalling.

    bool m_auto_neutral = false;

};

} // namespace Vamos_Body



#endif // not _DRIVETRAIN_H_