//
//  SuperTuxKart - a fun racing game with go-kart
//  Copyright (C) 2013-2015 SuperTuxKart-Team
//
//  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, write to the Free Software
//  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

#ifndef HEADER_MULTITOUCH_DEVICE_HPP
#define HEADER_MULTITOUCH_DEVICE_HPP

#include <array>
#include <map>
#include <vector>

#include "input/input_device.hpp"
#include "utils/types.hpp"
#include "IEventReceiver.h"

#define NUMBER_OF_MULTI_TOUCHES 10

enum MultitouchButtonType
{
    BUTTON_STEERING,
    BUTTON_UP_DOWN,
    BUTTON_FIRE,
    BUTTON_NITRO,
    BUTTON_SKIDDING,
    BUTTON_LOOK_BACKWARDS,
    BUTTON_RESCUE,
    BUTTON_ESCAPE,
    BUTTON_UP,
    BUTTON_DOWN,
    BUTTON_LEFT,
    BUTTON_RIGHT,
    BUTTON_CUSTOM
};

struct MultitouchEvent
{
    int id;
    bool touched;
    int x;
    int y;
};

struct MultitouchButton
{
    MultitouchButtonType type;
    PlayerAction action;
    bool pressed;
    unsigned int event_id;
    int x;
    int y;
    int width;
    int height;
    float axis_x;
    float axis_y;
    unsigned int id;
    void (*callback)(unsigned int, bool);
};

class Controller;

class MultitouchDevice : public InputDevice
{
private:
    /** The list of pointers to all created buttons */
    std::vector<MultitouchButton*> m_buttons;
    
    Controller* m_controller;

    /** The parameter that is used for steering button and determines dead area
     *  in a center of button */
    float m_deadzone;

    /** A parameter in range that determines the sensitivity for x axis. */
    float m_sensitivity_x;
    
    /** A parameter in range that determines the sensitivity for y axis. */
    float m_sensitivity_y;

    float m_orientation;
    uint64_t m_gyro_time;

    /** Pointer to the irrlicht device */
    IrrlichtDevice* m_irrlicht_device;

    float getSteeringFactor(float value, float sensitivity);
    void handleControls(MultitouchButton* button);
    bool isGameRunning();

    std::map<unsigned, std::vector<MultitouchButton*> > m_affected_linked_buttons;

public:
    /** The array that contains data for all multitouch input events */
    std::array<MultitouchEvent, NUMBER_OF_MULTI_TOUCHES> m_events;

    MultitouchDevice();
    virtual ~MultitouchDevice();

    /** Unused function */
    bool processAndMapInput(Input::InputType type,  const int id,
                            InputManager::InputDriverMode mode,
                            PlayerAction *action, int* value = NULL)
                            {return true;}

    unsigned int getActiveTouchesCount();

    void addButton(MultitouchButtonType type, int x, int y, int width,
                   int height, void (*callback)(unsigned int, bool) = NULL);
    void clearButtons();
    void reset();

    /** Returns the number of created buttons */
    unsigned int getButtonsCount() { return (unsigned int)m_buttons.size();}

    /** Returns pointer to the selected button */
    MultitouchButton* getButton(unsigned int i) {return m_buttons.at(i);}

    void activateAccelerometer();
    void deactivateAccelerometer();
    bool isAccelerometerActive();

    void activateGyroscope();
    void deactivateGyroscope();
    bool isGyroscopeActive();

    void updateAxisX(float value);
    void updateAxisY(float value);
    float getOrientation();
    void updateOrientationFromAccelerometer(float x, float y);
    void updateOrientationFromGyroscope(float z);
    void updateDeviceState(unsigned int event_id);
    void updateController();
    void updateConfigParams();

};   // MultitouchDevice

#endif