/*
    Copyright 2016-2020 Arisotura

    This file is part of melonDS.

    melonDS 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.

    melonDS 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 melonDS. If not, see http://www.gnu.org/licenses/.
*/

#include <QKeyEvent>
#include <SDL2/SDL.h>

#include "Input.h"
#include "PlatformConfig.h"


namespace Input
{

int JoystickID;
SDL_Joystick* Joystick = nullptr;

u32 KeyInputMask, JoyInputMask;
u32 KeyHotkeyMask, JoyHotkeyMask;
u32 HotkeyMask, LastHotkeyMask;
u32 HotkeyPress, HotkeyRelease;


void OpenJoystick()
{
    if (Joystick) SDL_JoystickClose(Joystick);

    int num = SDL_NumJoysticks();
    if (num < 1)
    {
        Joystick = nullptr;
        return;
    }

    if (JoystickID >= num)
        JoystickID = 0;

    Joystick = SDL_JoystickOpen(JoystickID);
}

void CloseJoystick()
{
    if (Joystick)
    {
        SDL_JoystickClose(Joystick);
        Joystick = nullptr;
    }
}


void Process()
{
    SDL_JoystickUpdate();

    if (Joystick)
    {
        if (!SDL_JoystickGetAttached(Joystick))
        {
            SDL_JoystickClose(Joystick);
            Joystick = NULL;
        }
    }
    if (!Joystick && (SDL_NumJoysticks() > 0))
    {
        JoystickID = Config::JoystickID;
        OpenJoystick();
    }

    /*JoyInputMask = 0xFFF;
    for (int i = 0; i < 12; i++)
        if (JoystickButtonDown(Config::JoyMapping[i]))
            JoyInputMask &= ~(1<<i);

    JoyHotkeyMask = 0;
    for (int i = 0; i < HK_MAX; i++)
        if (JoystickButtonDown(Config::HKJoyMapping[i]))
            JoyHotkeyMask |= (1<<i);

    HotkeyMask = KeyHotkeyMask | JoyHotkeyMask;
    HotkeyPress = HotkeyMask & ~LastHotkeyMask;
    HotkeyRelease = LastHotkeyMask & ~HotkeyMask;
    LastHotkeyMask = HotkeyMask;*/
}


// TODO: MacOS version of this!
// distinguish between left and right modifier keys (Ctrl, Alt, Shift)
// Qt provides no real cross-platform way to do this, so here we go
// for Windows and Linux we can distinguish via scancodes (but both
// provide different scancodes)
#ifdef __WIN32__
bool IsRightModKey(QKeyEvent* event)
{
    quint32 scan = event->nativeScanCode();
    return (scan == 0x11D || scan == 0x138 || scan == 0x36);
}
#else
bool IsRightModKey(QKeyEvent* event)
{
    quint32 scan = event->nativeScanCode();
    return (scan == 0x69 || scan == 0x6C || scan == 0x3E);
}
#endif

}