/*************************************************************************/
/*  joystick_uwp.cpp                                                     */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
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/* Copyright (c) 2007-2016 Juan Linietsky, Ariel Manzur.                 */
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#include "joystick_uwp.h"

using namespace Windows::Gaming::Input;
using namespace Windows::Foundation;

void JoystickUWP::register_events() {

	Gamepad::GamepadAdded +=
		ref new EventHandler<Gamepad^>(this, &JoystickUWP::OnGamepadAdded);
	Gamepad::GamepadRemoved +=
		ref new EventHandler<Gamepad^>(this, &JoystickUWP::OnGamepadRemoved);
}

uint32_t JoystickUWP::process_controllers(uint32_t p_last_id) {

	for (int i = 0; i < MAX_CONTROLLERS; i++) {

		if (!controllers[i].connected) break;

		switch (controllers[i].type) {

		case ControllerType::GAMEPAD_CONTROLLER: {

			GamepadReading reading = ((Gamepad^)controllers[i].controller_reference)->GetCurrentReading();

			int button_mask = (int)GamepadButtons::Menu;
			for (int j = 0; j < 14; j++) {

				p_last_id = input->joy_button(p_last_id, controllers[i].id, j,(int)reading.Buttons & button_mask);
				button_mask *= 2;
			}

			p_last_id = input->joy_axis(p_last_id, controllers[i].id, JOY_AXIS_0, axis_correct(reading.LeftThumbstickX));
			p_last_id = input->joy_axis(p_last_id, controllers[i].id, JOY_AXIS_1, axis_correct(reading.LeftThumbstickY, true));
			p_last_id = input->joy_axis(p_last_id, controllers[i].id, JOY_AXIS_2, axis_correct(reading.RightThumbstickX));
			p_last_id = input->joy_axis(p_last_id, controllers[i].id, JOY_AXIS_3, axis_correct(reading.RightThumbstickY, true));
			p_last_id = input->joy_axis(p_last_id, controllers[i].id, JOY_AXIS_4, axis_correct(reading.LeftTrigger, false, true));
			p_last_id = input->joy_axis(p_last_id, controllers[i].id, JOY_AXIS_5, axis_correct(reading.RightTrigger, false, true));

			break;
		}
		}
	}

	return p_last_id;
}

JoystickUWP::JoystickUWP() {

	for (int i = 0; i < MAX_CONTROLLERS; i++)
		controllers[i].id = i;
}

JoystickUWP::JoystickUWP(InputDefault * p_input) {

	input = p_input;

	JoystickUWP();
}

void JoystickUWP::OnGamepadAdded(Platform::Object ^ sender, Windows::Gaming::Input::Gamepad ^ value) {

	short idx = -1;

	for (int i = 0; i < MAX_CONTROLLERS; i++) {

		if (!controllers[i].connected) {
			idx = i;
			break;
		}
	}

	ERR_FAIL_COND(idx == -1);

	controllers[idx].connected = true;
	controllers[idx].controller_reference = value;
	controllers[idx].id = idx;
	controllers[idx].type = ControllerType::GAMEPAD_CONTROLLER;

	input->joy_connection_changed(controllers[idx].id, true, "Xbox Controller", "__UWP_GAMEPAD__");
}

void JoystickUWP::OnGamepadRemoved(Platform::Object ^ sender, Windows::Gaming::Input::Gamepad ^ value) {

	short idx = -1;

	for (int i = 0; i < MAX_CONTROLLERS; i++) {

		if (controllers[i].controller_reference == value) {
			idx = i;
			break;
		}
	}

	ERR_FAIL_COND(idx == -1);

	for (int i = idx + 1; i < MAX_CONTROLLERS - 1; i++) {

		if (!controllers[i].connected) {
			break;
		}

		controllers[i - 1] = controllers[i];
	}
	controllers[MAX_CONTROLLERS - 1] = ControllerDevice();

	input->joy_connection_changed(idx, false, "Xbox Controller");
}

InputDefault::JoyAxis JoystickUWP::axis_correct(double p_val, bool p_negate, bool p_trigger) const {

	InputDefault::JoyAxis jx;

	jx.min = p_trigger ? 0 : -1;
	jx.value = (float)(p_negate ? -p_val : p_val);

	return jx;
}