/*

 *  The Mana World

 *  Copyright (C) 2004  The Mana World Development Team

 *

 *  This file is part of The Mana World.

 *

 *  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 2 of the License, or

 *  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

 */

#include "configuration.h"

#include "joystick.h"

#include "log.h"

#include <cassert>

int Joystick::joystickCount = 0;

void Joystick::init()

{

    SDL_InitSubSystem(SDL_INIT_JOYSTICK);

    // Have SDL call SDL_JoystickUpdate() automatically

    SDL_JoystickEventState(SDL_ENABLE);

    joystickCount = SDL_NumJoysticks();

    logger->log("%i joysticks/gamepads found", joystickCount);

    for (int i = 0; i < joystickCount; i++)

        logger->log("- %s", SDL_JoystickName(i));

}

Joystick::Joystick(int no):

    mDirection(0),

    mCalibrating(false),

    mEnabled(false)

{

    assert(no < joystickCount);

    mJoystick = SDL_JoystickOpen(no);

    // TODO Bail out!

    if (!mJoystick)

    {

        logger->log("Couldn't open joystick: %s", SDL_GetError());

        return;

    }

    logger->log("Axes: %i ", SDL_JoystickNumAxes(mJoystick));

    logger->log("Balls: %i", SDL_JoystickNumBalls(mJoystick));

    logger->log("Hats: %i", SDL_JoystickNumHats(mJoystick));

    logger->log("Buttons: %i", SDL_JoystickNumButtons(mJoystick));

    mEnabled = (int) config.getValue("joystickEnabled", 0) != 0;

    mUpTolerance = (int) config.getValue("upTolerance", 100);

    mDownTolerance = (int) config.getValue("downTolerance", 100);

    mLeftTolerance = (int) config.getValue("leftTolerance", 100);

    mRightTolerance = (int) config.getValue("rightTolerance", 100);

}

Joystick::~Joystick()

{

    SDL_JoystickClose(mJoystick);

}

void Joystick::update()

{

    mDirection = 0;

    // When calibrating, don't bother the outside with our state

    if (mCalibrating) {

        doCalibration();

        return;

    };

    if (!mEnabled)

        return;

    // X-Axis

    int position = SDL_JoystickGetAxis(mJoystick, 0);

    if (position >= mRightTolerance)

        mDirection |= RIGHT;

    else if (position <= mLeftTolerance)

        mDirection |= LEFT;

    // Y-Axis

    position = SDL_JoystickGetAxis(mJoystick, 1);

    if (position <= mUpTolerance)

        mDirection |= UP;

    else if (position >= mDownTolerance)

        mDirection |= DOWN;

    // Buttons

    for (int i = 0; i < MAX_BUTTONS; i++)

        mButtons[i] = (SDL_JoystickGetButton(mJoystick, i) == 1);

}

void Joystick::startCalibration()

{

    mUpTolerance = 0;

    mDownTolerance = 0;

    mLeftTolerance = 0;

    mRightTolerance = 0;

    mCalibrating = true;

}

void Joystick::doCalibration()

{

    // X-Axis

    int position = SDL_JoystickGetAxis(mJoystick, 0);

    if (position > mRightTolerance)

        mRightTolerance = position;

    else if (position < mLeftTolerance)

        mLeftTolerance = position;

    // Y-Axis

    position = SDL_JoystickGetAxis(mJoystick, 1);

    if (position > mDownTolerance)

        mDownTolerance = position;

    else if (position < mUpTolerance)

        mUpTolerance = position;

}

void Joystick::finishCalibration()

{

    config.setValue("leftTolerance", mLeftTolerance);

    config.setValue("rightTolerance", mRightTolerance);

    config.setValue("upTolerance", mUpTolerance);

    config.setValue("downTolerance", mDownTolerance);

    mCalibrating = false;

}

bool Joystick::buttonPressed(unsigned char no) const

{

    return (mEnabled && no < MAX_BUTTONS) ? mButtons[no] : false;

}