/*
   model/map.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_MAPFILE_H__
#define __INCLUDED_MODEL_MAPFILE_H__

#include <string>
#include <vector>

#include "model/material.h"
#include "model/model.h"
#include "model/face.h"
#include "model/primitives.h"
#include "model/trianglelist.h"
#include "filesystem/filestream.h"

namespace model
{

/// class to parse the .map file structure and load geometry data into a model
class MapFile
{

public:
	/**
	 * @brief load a .map file into a Model
	 * @param name	name of the model to be loaded, without .map extension or maps/ prefix
	 * If the file can not be read, load() returns the NULL-pointer
	 */
	static Model *load(std::string const &name);

private:
	MapFile();
	~MapFile();

	/// tpye definition for a per-material list of Primitives
	typedef std::map<Material *, Primitives *> Materials;

	/// open the file for reading
	/** the filename will get the "maps/" prefix and ".map" suffix
	 */
	bool open(std::string const & name);

	/// parse one line, returns false on end-of-file
	bool getline();

	bool read_patchdef();

	/// current classname
	inline std::string classname() const {
		return classname_current;
	}

	/// current key
	inline std::string key() const {
		return key_current;
	}

	/// current value
	inline std::string value() const {
		return value_current;
	}

	/// true if the last read line contained a new classname
	bool got_classname() const;

	/// true if we are inside the requested class
	bool in_class(const char *name) {
		return (classname_current.compare(name) == 0);
	}

	/// true if the last read line contained a class closing bracket
	inline bool got_classend() const {
		return last_read_was_classend;
	}

	/// true if the last read line contained the closing bracket for the requested class
	bool got_classend(const char*) const;

	/// true if the last read line contained a new classname
	bool got_classname(const char*) const;

	/// true if the last read statement was a key=value pair
	inline bool got_key() const {
		return last_read_was_key;
	}

	bool got_key(const char * keylabel);

	/// check if the last read key=value pair matches keylabel and store the value in valuestring
	bool got_key_string(const char * keylabel, std::string & valuestring);

	/// check if the last read key=value pair matches keylabel and store the value in color
	bool got_key_color(const char * keylabel, math::Color & color);

	/// check if the last read key=value pair matches keylabel and store the value in f
	bool got_key_float(const char * keylabel, float & f);

	/// check if the last read key=value pair matches keylabel and store the value in f
	bool got_key_int(const char * keylabel, unsigned int & u);

	/// check if the last read key=value pair matches keylabel and store the value in valuestring
	bool got_key_angle(const char * keylabel, float & f);

	bool got_key_vector3f(const char * keylabel, math::Vector3f & v);
	
	/// check if the last read key is one of the axis related keys (angle, angles, pitch, yaw, roll)
	bool got_key_axis(math::Axis &axis);


	/// return the number of lines read so far
	inline unsigned int line() const {
		return line_number;
	}

	/// return true of the map file is open for reading
	inline bool is_open() {
		return mapfile_ifs.is_open();
	}

	/// current filename
	inline std::string const & name() const {
		return mapfile_name;
	}
	
	inline const math::BoundingBox3f & box() const {
		return map_box;
	}
	
	inline bool collinear(const math::Vector3f & a, const math::Vector3f & b, const math::Vector3f & c)
	{
		if ((distance(a, b) + distance(b, c)) == distance(a, c))
			return true;
		else
			return false;
	}

	/// close the file
	void close();

	/// generate triangles for one plane in the plane list
	void make_brushface(Face *face);

	/// load parsed primitives into a FragmentGroup
	void load_fragmentgroup(Model *model, const FragmentGroup::Type class_type);

	/// clear the current list of per-material geometry
	void clear_materials();

	/// clear class bounding box
	void clear_bbox();

	/// print 'unkown class' warning message to the console
	void unknown_class() const;

	/// print 'unkown key' warning message to the console
	void unknown_key() const;

	/// print 'unkown value' warning message to the console
	void unknown_value() const;
	
	/// print 'depricated key' warning message to the console
	void warn_depricated() const;
	
	/// print a generic error message
	void unknown_error(const char *text = 0) const;
	
	/// print a generic error message
	void unknown_error(const std::string &text) const;

	/// list of planes for the current brush
	std::vector<Face *>	planes;

	std::string 		classname_current;
	std::string 		key_current;
	std::string 		value_current;

	bool 			last_read_was_key;
	bool 			last_read_was_classname;
	bool			last_read_was_classend;
	
	bool			map_load_clip;
	CollisionModel		*map_collisionmodel;

	unsigned int		map_brushes;
	unsigned int		map_faces;
	unsigned int		map_faces_detail;

	unsigned int		parse_level;
	unsigned int 		line_number;
	filesystem::IFileStream	mapfile_ifs;
	std::string 		mapfile_name;

	math::BoundingBox3f	map_box;
	
	math::BoundingBox3f	class_box;
	math::Axis		class_axis;
	float			class_speed;
	float			class_distance;
	bool			class_engine;

	
	/**
	 *@brief  list of vertices with origin material
	 * */
	std::vector<math::Vector3f *> class_origin_vertices;
	
	/**
	 * @brief list of vertices with bounds material
	*/
	std::vector<math::Vector3f *> map_bounds_vertices;
	
	Materials		map_materials;
	TriangleList		map_collisiontriangles;

	bool			warning_q2brush;

	bool			in_patchdef;
};

}

#endif // __INCLUDED_MODEL_MAPFILE_H__