/*
 * 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 <exception>

#include <GL/gl.h>

#include "text.hpp"

namespace usdx
{
	log4cpp::Category& Text::log =
		log4cpp::Category::getInstance("usdx.menu.text");

	Text::Text(Container *parent, const std::string text,
			   const unsigned int size, const VerticalTextAlignment* valign) :
		DrawableControl(parent), text(text), auto_size(false),
		stretch(false), offset(Point<int>(0, 0)), valign(valign)
	{
		font = new FTBufferFont("DejaVuSans.ttf");
		if (font->Error()) {
			throw new std::exception();
		}

		font->FaceSize(size);
		realign();
	}

	Text::~Text()
	{
		if (valign) {
			delete valign;
			valign = NULL;
		}

		if (font) {
			delete font;
			font = NULL;
		}
	}

	Rectangle<int> Text::makeRect(const FTBBox& bbox)
	{
		return Rectangle<int>(Point<int>(bbox.Upper().X(), bbox.Upper().Y()),
							  Point<int>(bbox.Lower().X(), bbox.Lower().Y()));
	}


	void Text::realign(void)
	{
		boost::shared_lock<boost::shared_mutex> lock(font_mutex);
		Rectangle<int> bbox = makeRect(font->BBox(text.c_str()));
		bbox.get_point1().set_y(font->Ascender());
		bbox.get_point2().set_y(font->Descender());
		valign->align(offset, bbox, get_size());

		if (auto_size && get_size() != bbox.get_dim()) {
			set_size(bbox.get_dim());
		}
	}

	void Text::draw(void)
	{
		DrawableControl::draw();

		boost::shared_lock<boost::shared_mutex> lock(font_mutex);
		glTranslatef(offset.get_x(), offset.get_y(), 0.0f);

		// invert y axis, text is drawn using window orientation (origin is
		// bottom left)
		glScalef(1, -1, 1);
		font->Render(text.c_str());
	}

	void Text::set_font_size(unsigned int value)
	{
		{
			boost::unique_lock<boost::shared_mutex> lock(font_mutex);
			font->FaceSize(value);
		}

		realign();
	}

	unsigned int Text::get_font_size(void) const
	{
		boost::shared_lock<boost::shared_mutex> lock(font_mutex);
		return font->FaceSize();
	}

	void Text::set_text(const std::string value)
	{
		{
			boost::unique_lock<boost::shared_mutex> lock(font_mutex);
			text = value;
		}

		realign();
	}

	std::string Text::get_text(void) const
	{
		boost::shared_lock<boost::shared_mutex> lock(font_mutex);
		return text;
	}

	void Text::set_size(const Dimension<int>& size)
	{
		DrawableControl::set_size(size);
		realign();
	}

	void Text::set_size(int width, int height)
	{
		DrawableControl::set_size(width, height);
		realign();
	}

	void Text::set_auto_size(const bool value)
	{
		auto_size = value;

		set_clipping_required(!auto_size);
		realign();
	}

	bool Text::get_auto_size(void) const
	{
		return auto_size;
	}

}