/*
   model/material.h
   This file is part of the Osirion project and is distributed under
   the terms of the GNU General Public License version 2
*/

#ifndef __INCLUDED_MODEL_MATERIAL_H__
#define __INCLUDED_MODEL_MATERIAL_H__

#include <string>
#include <map>

#include "math/color.h"
#include "math/vector2f.h"

namespace model
{

/// fragment surface material parameters
class Material
{
public:
	/// function pointer type for local functions
	typedef void(* LoaderFuncPtr)(Material *);

	/// surface flags
	enum SurfaceFlags { None=0, Primary=1, Secondary=2, Tertiary=3, Bright=4, Engine=8, Environment=16, Texture=32, Ignore=64};

	/// type definition for the material registry
	typedef std::map<std::string, Material *> Registry;

	Material(const std::string &name);

	~Material();

	/* ---- inspectors ----------------------------------------- */

	inline const std::string &name() const { return material_name; }

	inline const math::Color &color() const { return material_color; }

	inline const unsigned int flags() const { return material_flags; }

	inline const std::string &texture() const { return material_texture; }

	inline const size_t texture_id() const { return material_texture_id; }

	/**
	 * @brief returns the material texture size
	 */
	inline const math::Vector2f & size() const { return material_size; }

	/* ---- mutators ------------------------------------------- */

	void set_color(const math::Color &color);

	/**
	 * @brief set the material texture name
	 */
	void set_texture(const std::string &texture);

	/**
	 * @brief set the material texture id
	 */
	void set_texture_id(const size_t texture_id);

	/**
	 * @brief set the material texture size
	 */
	void set_size(const float width, const float height);

	/**
	 * @brief set the material texture size
	 */
	void set_size(const math::Vector2f &size);

	inline void set_flags(SurfaceFlags flags)
	{
		material_flags |= flags;
	}

	inline void unset_flags(SurfaceFlags flags)
	{
		material_flags &= ~flags;
	}
	
	/* ---- static ----------------------------------------------------- */

	/**
	 * @brief initialize material registry
	 * reads materials from the shader files listed in shaderlist.txt
	 */
	static void init();

	/** 
	 * @brief shutdown material registry
	 */
	static void shutdown();

	/** 
	 * @brief clear material registry
	 */
	static void clear();

	/**
	 * @brief print registered materials to the system console
	 */
	static void list();

	/**
	 * @brief add a material to the registry
	 */
	static void add(Material *material);

	/**
	 * @brief find a material in the registry
	 */
	static Material *find(const std::string &name);

	static void set_loader_func(LoaderFuncPtr func);

private:

	std::string		material_name;
	math::Color		material_color;
	unsigned int		material_flags;
	std::string		material_texture;
	size_t			material_texture_id;

	/// size of the material
	math::Vector2f		material_size;

	/// the materials registry
	static Registry		material_registry;

	static void load_shader(const std::string &shadername);

	static LoaderFuncPtr	material_loaderfunc;
};

}

#endif // __INCLUDED_MODEL_MATERIAL_H__