/*
 * theme.hpp -- theming support for gui elements
 *
 * Copyright (c) 2013-2018 David Demelier <markand@malikania.fr>
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#ifndef MALIKANIA_CLIENT_THEME_HPP
#define MALIKANIA_CLIENT_THEME_HPP

/**
 * \file theme.hpp
 * \brief Theming support for gui elements.
 */

#include <memory>

#include <malikania/size.hpp>

#include "color.hpp"
#include "font.hpp"

namespace mlk {

struct rectangle;

namespace client {

class button;
class input;
class label;
class painter;

/**
 * \brief Reimplement this class to provide your own theme.
 */
class theme {
private:
	static theme* global;

	font font_;
	color background_color_;
	color border_color_;
	color text_color_;

public:
	/**
	 * Get the default theme for whole game.
	 *
	 * \return the theme
	 */
	static auto get_default() noexcept -> theme&;

	/**
	 * Set the default theme.
	 *
	 * \param theme the theme
	 */
	static void set_default(theme& theme) noexcept;

	/**
	 * Default constructor.
	 */
	theme();

	/**
	 * Virtual destructor defaulted.
	 */
	virtual ~theme() noexcept = default;

	/**
	 * Get the font.
	 *
	 * \return the font
	 */
	virtual auto get_font() const noexcept -> const font&;

	/**
	 * Overloaded function.
	 *
	 * \return the font
	 */
	virtual auto get_font() noexcept -> font&;

	/**
	 * Get the background color for basic widgets.
	 *
	 * \return the color
	 */
	virtual auto get_background_color() const noexcept -> const color&;

	/**
	 * Get the border color for basic widgets.
	 *
	 * \return the color
	 */
	virtual auto get_border_color() const noexcept -> const color&;

	/**
	 * Get the text color for basic widgets.
	 *
	 * \return the color
	 */
	virtual auto get_text_color() const noexcept -> const color&;

	/**
	 * Draw a button.
	 *
	 * \param painter the painter
	 * \param button the button
	 */
	virtual void draw_button(painter& painter, const button& button);

	/**
	 * Draw a label.
	 *
	 * \param painter the painter
	 * \param label the label
	 */
	virtual void draw_label(painter& painter, const label& label);

	/**
	 * Draw an input text.
	 *
	 * \param painter the painter
	 * \param input the input
	 */
	virtual void draw_input(painter& painter, const input& input);
};

} // !client

} // !mlk

#endif // !MALIKANIA_CLIENT_THEME_HPP