/*
 * Copyright (c) 2015-2017 Alex Spataru <alex_spataru@outlook.com>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

#ifndef _QJOYSTICKS_JOYSTICK_H
#define _QJOYSTICKS_JOYSTICK_H

#include <QWidget>
#include <QKeyEvent>
#include <QApplication>
#include <QTimer>
#include <QScopedPointer>

#include "JoysticksCommon.h"

#define AXIS_AD 0
#define AXIS_SW 1
#define AXIS_QE 2
#define AXIS_UO 3
#define AXIS_JL 4
#define AXIS_KI 5

enum AxisState : qint8
{

	INCREASE = -1,
	STILL = 0,
	DECREASE = 1

};

const qint16 AXIS_MINIMUM_VIRTUAL_JOYSTICK { -32767 };
const qint16 AXIS_MAXIMUM_VIRTUAL_JOYSTICK { 32767 };

const int NUMBER_OF_AXES { 6 };
const int NUMBER_OF_BUTTONS { 10 };

/**
 * \brief Translates keyboard input to joystick input
 *
 * This class implements a virtual joystick device that uses the computer's
 * keyboard as means to get the axis, button and POV values of the joystick.
 */
class VirtualJoystick : public QObject
{
	Q_OBJECT

signals:
	void enabledChanged();
	void povEvent(const QJoystickPOVEvent &event);
	void axisEvent(const QJoystickAxisEvent &event);
	void buttonEvent(const QJoystickButtonEvent &event);

public:
	VirtualJoystick(QObject *parent = Q_NULLPTR);

	qreal axisRange() const;
	bool joystickEnabled() const;
	QJoystickDevice *joystick();

public slots:
	void setJoystickID(int id);
	void setAxisRange(qreal range);
	void setJoystickEnabled(bool enabled);

	void setAxisSensibility(qreal sensibility);

private slots:
	void readAxes(int key, bool pressed);
	void updateAxis();
	void readPOVs(int key, bool pressed);
	void readButtons(int key, bool pressed);
	void processKeyEvent(QKeyEvent *event, bool pressed);

protected:
	bool eventFilter(QObject *object, QEvent *event);

private:
	qreal m_axisRange;
	bool m_joystickEnabled;
	QJoystickDevice m_joystick;

	qint16 m_axisStep;

	QVector<AxisState> m_axisStatus;
	QVector<qint16> m_axisValue;

	QScopedPointer<QTimer> m_timerUpdateAxis;

	void changeAxisValue(quint8 axis);
	void resetAllAxes();
};

#endif