/*
 * UltraStar Deluxe - Karaoke Game
 *
 * UltraStar Deluxe is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * 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 (at your option) 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; see the file COPYING. If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 *
 */
#include <cstddef>
#include <iostream>

#include <GL/gl.h>

#include "software_mouse_pointer.hpp"
#include "utils/activator.hpp"
#include "utils/compat/chrono_literals.hpp"

namespace usdx
{
	SoftwareMousePointer::SoftwareMousePointer(Container* parent, EventManager* event_manager)
		: DrawableControl(parent), color(255,255,255,100), down(false)
	{
		fade_inactive = new Timer(this, 2_s, true);

		this->vertices[0] = 0.0f;
		this->vertices[1] = 40.0f;
		this->vertices[2] = 40.0f;
		this->vertices[3] = 40.0f;
		this->vertices[4] = 40.0f;
		this->vertices[5] = 0.0f;
		this->vertices[6] = 0.0f;
		this->vertices[7] = 0.0f;

		set_position(0, 0);
		set_size(40, 40);
		set_focusable(false);

		texture_normal = new Disposer<Texture>(new Texture("game/themes/Deluxe/interface/cursor.png"));
		texture_pressed = new Disposer<Texture>(new Texture("game/themes/Deluxe/interface/cursor_pressed.png"));

		mouse_move_connection = event_manager->mouse_move.connect(
			boost::bind(&SoftwareMousePointer::on_mouse_move, this, _1));
		mouse_down_connection = event_manager->mouse_down.connect(
			boost::bind(&SoftwareMousePointer::on_mouse_down, this, _1, _2));
		mouse_up_connection = event_manager->mouse_up.connect(
			boost::bind(&SoftwareMousePointer::on_mouse_up, this, _1, _2));
	}

	SoftwareMousePointer::~SoftwareMousePointer()
	{
		mouse_move_connection.disconnect();
		mouse_down_connection.disconnect();
		mouse_up_connection.disconnect();

		if (texture_normal != NULL) {
			delete texture_normal;
			texture_normal = NULL;
		}

		if (texture_pressed != NULL) {
			delete texture_pressed;
			texture_pressed = NULL;
		}
	}

	Texture* SoftwareMousePointer::get_current_texture() const
	{
		if (is_down()) {
			return texture_pressed->get();
		}
		else {
			return texture_normal->get();
		}
	}

	void SoftwareMousePointer::draw(void)
	{
		if (fade_inactive->is_ready()) {
			set_visible(false);
			return;
		}

		Activator a(get_current_texture());

		glEnableClientState(GL_VERTEX_ARRAY);
		glEnableClientState(GL_TEXTURE_COORD_ARRAY);
		glEnableClientState(GL_COLOR_ARRAY);

		glVertexPointer(2, GL_FLOAT, 0, vertices);
		glColorPointer(4, GL_UNSIGNED_BYTE, 0, color.get_array(4));
		glTexCoordPointer(2, GL_FLOAT, 0, Texture::default_vertices);

		glEnable(GL_BLEND);
		glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);

		glDrawArrays(GL_QUADS, 0, 4);

		glDisable(GL_BLEND);

		glDisableClientState(GL_VERTEX_ARRAY);
		glDisableClientState(GL_TEXTURE_COORD_ARRAY);
		glDisableClientState(GL_COLOR_ARRAY);
	}

	void SoftwareMousePointer::update(void)
	{
		fade_inactive->update();

		if (!is_visible()) {
			set_visible(true);
		}
	}

	void SoftwareMousePointer::on_mouse_move(const Point<int>& p)
	{
		set_position(p.get_x(), p.get_y());
		update();
	}

	void SoftwareMousePointer::on_mouse_down(uint8_t button, const Point<int>& p)
	{
		if (button == 1) {
			boost::unique_lock<boost::shared_mutex> lock(down_mutex);
			down = true;
		}

		update();
	}

	void SoftwareMousePointer::on_mouse_up(uint8_t button, const Point<int>& p)
	{
		if (button == 1) {
			boost::unique_lock<boost::shared_mutex> lock(down_mutex);
			down = false;
		}

		update();
	}

	bool SoftwareMousePointer::is_down(void) const
	{
		boost::shared_lock<boost::shared_mutex> lock(down_mutex);
		return down;
	}
}