/*
   client/joystick.cc
   This file is part of the Osirion project and is distributed under
   the terms and conditions of the GNU General Public License version 2
*/

#include "SDL2/SDL.h"

#include "auxiliary/functions.h"
#include "client/joystick.h"

#include "sys/sys.h"

namespace client
{

// configured joystick number
core::Cvar *Joystick::input_joystick = 0;

// joystick axes
core::Cvar *Joystick::input_axisdirection = 0;
core::Cvar *Joystick::input_axispitch = 0;
core::Cvar *Joystick::input_axisroll = 0;
core::Cvar *Joystick::input_axisthrottle = 0;

// current joystick number
int current_joystick_number = 0;

SDL_Joystick *current_joystick = 0;

void Joystick::init()
{
	SDL_InitSubSystem(SDL_INIT_JOYSTICK);

	int nbjoysticks = SDL_NumJoysticks();
	if (nbjoysticks) {
		for (int i = 0; i < nbjoysticks; i++) {
			SDL_Joystick *joystick = SDL_JoystickOpen(i);
			if (joystick) {
				con_print << "  joystick " << i + 1 << ": " <<
				SDL_JoystickName(joystick) << " " <<
				SDL_JoystickNumAxes(joystick) << " axes " <<
				SDL_JoystickNumButtons(joystick) << " buttons " << std::endl;

				SDL_JoystickClose(joystick);
			}
		}
	}

	input_joystick = core::Cvar::get("input_joystick", 0.0f, core::Cvar::Archive);
	input_joystick->set_info("[int] set joystick number to use");

	input_axisdirection = core::Cvar::get("input_axisdirection", 1.0f, core::Cvar::Archive);
	input_axisdirection->set_info("[int] joystick axis for direction control, 0 disables");
	
	input_axispitch = core::Cvar::get("input_axispitch", 2.0f, core::Cvar::Archive);
	input_axispitch->set_info("[int] joystick axis for pitch control, 0 disables");
	
	input_axisroll = core::Cvar::get("input_axisroll", 3.0f, core::Cvar::Archive);
	input_axisroll->set_info("[int] joystick axis for roll control, 0 disables");
	
	input_axisthrottle = core::Cvar::get("input_axisthrottle", 4.0f, core::Cvar::Archive);
	input_axisthrottle->set_info("[int] joystick axis for throttle control, 0 disables");

	current_joystick_number = 0;
	SDL_JoystickEventState(SDL_IGNORE);
}

void Joystick::shutdown()
{
	if (current_joystick) {
		SDL_JoystickEventState(SDL_IGNORE);
		SDL_JoystickClose(current_joystick);
		current_joystick = 0;
	}

	SDL_QuitSubSystem(SDL_INIT_JOYSTICK);
}

void Joystick::list()
{
	if (current_joystick) {
		SDL_JoystickEventState(SDL_IGNORE);
		SDL_JoystickClose(current_joystick);
		current_joystick = 0;
	}

	int nbjoysticks = SDL_NumJoysticks();
	if (nbjoysticks) {
		for (int i = 0; i < nbjoysticks; i++) {
			SDL_Joystick *joystick = SDL_JoystickOpen(i);
			if (joystick) {
				con_print << "  joystick " << i + 1 << ": " <<
				SDL_JoystickName(joystick) << " " <<
				SDL_JoystickNumAxes(joystick) << " axes " <<
				SDL_JoystickNumButtons(joystick) << " buttons " << std::endl;

				SDL_JoystickClose(joystick);
			}
		}
	}

	current_joystick_number = (int) input_joystick->value();
	if ((current_joystick_number < 1) || (current_joystick_number > nbjoysticks)) {
		current_joystick_number = 0;
	}
	(*input_joystick) = (float) current_joystick_number;

	if (current_joystick_number) {
		current_joystick = SDL_JoystickOpen(current_joystick_number - 1);
	}

	if (current_joystick) {
		con_debug << "  using joystick " << SDL_JoystickName(current_joystick) << std::endl;
		SDL_JoystickEventState(SDL_ENABLE);
	}
}

bool Joystick::is_enabled()
{
	return (current_joystick != 0);
}

void Joystick::frame()
{
	if (current_joystick_number != (int) input_joystick->value()) {
		if (current_joystick) {
			SDL_JoystickEventState(SDL_IGNORE);
			SDL_JoystickClose(current_joystick);
			current_joystick = 0;
		}

		current_joystick_number = (int) input_joystick->value();
		if ((current_joystick_number < 1) || (current_joystick_number > SDL_NumJoysticks())) {
			current_joystick_number = 0;
		}
		(*input_joystick) = (float) current_joystick_number;

		if (current_joystick_number) {
			current_joystick = SDL_JoystickOpen(current_joystick_number - 1);
		}

		if (current_joystick) {
			con_debug << "  using joystick " << SDL_JoystickName(current_joystick) << std::endl;
			SDL_JoystickEventState(SDL_ENABLE);
		}
	}
}

}