/*! \file   PointController.H c++/PointController.H
    \brief  C++ Switch Point Controller Class Interface
    \author Zhengrong.Zang@gmail.com
	\date   2013.10.01
	
    Defines interface to control Train Switch Point
*/
// The contents of this file are subject to the Mozilla Public License
// Version 1.0 (the "License"); you may not use this file except in
// compliance with the License. You may obtain a copy of the License
// at http://www.mozilla.org/MPL/
// 
// Software distributed under the License is distributed on an "AS IS"
// basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
// the License for the specific language governing rights and
// limitations under the License.

#ifndef _PointController_H_
#define _PointController_H_

#include <c++/Motor.H>

class PointController {
public:
	static const int SWITCH_DURATION = 50;
	enum PointDirection {Straight, Curve};

private:
	Motor *motor;
	PointDirection mdir;
	
public:
	PointController(Motor::Port port) {
		motor = new Motor(port);
		toStraight();
	}
	
	~PointController() {
		toStraight();
		delete motor;
	}
	
	const PointDirection dir() const {
		return mdir;
	}
	
	const void toStraight() {
		mdir = PointController::Straight;
		motor->forward(Motor::max);
		delay(PointController::SWITCH_DURATION);
		motor->brake();
	}

	const void toCurve() {
		mdir = PointController::Curve;
		motor->backward(Motor::max);
		delay(PointController::SWITCH_DURATION);
		motor->brake();
	}
	
	const void toggle() {
		if (mdir == PointController::Straight) {
			toCurve();
		}
		else {
			toStraight();
		}
	}
};

#endif // _PointController_H_