/*  LilyPad - Pad plugin for PS2 Emulator
 *  Copyright (C) 2002-2015  PCSX2 Dev Team/ChickenLiver
 *
 *  PCSX2 is free software: you can redistribute it and/or modify it under the
 *  terms of the GNU Lesser General Public License as published by the Free
 *  Software Found- ation, either version 3 of the License, or (at your option)
 *  any later version.
 *
 *  PCSX2 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 PCSX2.  If not, see <http://www.gnu.org/licenses/>.
 */

#include "Global.h"
#include "InputManager.h"

#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <linux/input.h>

struct abs_info
{
    uint16_t code;
    int32_t min;
    int32_t max;

    int32_t factor;
    int32_t translation;

    abs_info(int32_t _code, int32_t _min, int32_t _max, ControlType type)
        : code(_code)
        , min(_min)
        , max(_max)
    {
        translation = 0;
        // Note: ABSAXIS ranges from -64K to 64K
        // Note: PSHBTN ranges from 0 to 64K
        if ((min == 0) && (max == 255)) {
            if (type == ABSAXIS) {
                translation = 128;
                factor = FULLY_DOWN / 128;
            } else {
                factor = FULLY_DOWN / 256;
            }
        } else if ((min == -1) && (max == 1)) {
            factor = FULLY_DOWN;
        } else if ((min == 0) && (std::abs(max - 127) < 2)) {
            translation = 64;
            factor = -FULLY_DOWN / 64;
        } else if ((max == 255) && (std::abs(min - 127) < 2)) {
            translation = 64 + 128;
            factor = FULLY_DOWN / 64;
        } else {
            fprintf(stderr, "Scale not supported\n");
            factor = 0;
        }
    }

    int scale(int32_t value)
    {
        return (value - translation) * factor;
    }
};

class JoyEvdev : public Device
{
    int m_fd;
    std::vector<abs_info> m_abs;
    std::vector<uint16_t> m_btn;
    std::vector<uint16_t> m_rel;

public:
    JoyEvdev(int fd, bool ds3, const wchar_t *id);
    ~JoyEvdev();
    int Activate(InitInfo *args);
    int Update();
};

void EnumJoystickEvdev();