/*
   common/inifile.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_FILESYSTEM_INIFILE_H__
#define __INCLUDED_FILESYSTEM_INIFILE_H__

#include <string>
#include <fstream>

#include "math/vector3f.h"
#include "math/color.h"
#include "filesystem/file.h"

namespace filesystem {

/// a class to read .ini files
/** The IniFile class provides functions to read .ini files. A .ini file
 *  consists of one or more [section] headers followed by one or more key=value
 *  pairs. Lines starting with # or ; are considered comments
 */
class IniFile {
public:
	IniFile();
	~IniFile();

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

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

	/// current section label
	inline std::string section() const {
		return section_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 statement was a section header
	bool got_section() const;

	/// true if the current section matches
	bool in_section(const char *sectionlabel) const;

	/// true if the last read statement was a certain section header
	bool got_section(const char * sectionlabel) const;

	/// true if the last read statement was a key=value pair
	bool got_key() const;

	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);

	bool got_key_color(const char * keylabel, math::Color & color);

	bool got_key_float(const char * keylabel, float & f);

	bool got_key_angle(const char * keylabel, float & f);

	bool got_key_vector3f(const char * keylabel, math::Vector3f & v);

	bool got_key_bool(const char * keylabel, bool & b);


	inline unsigned int line() const {
		return line_number;
	}

	/// print a default unkown value error
	void unknown_value() const;

	/// print a default unkown key error
	void unkown_key() const;

	/// print a default unkown section error
	void unknown_section() const;

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

	/// current filename
	inline std::string const & name() const {return inifile_name; }

	/// close the file
	void close();

private:
	std::string 		section_current;
	std::string 		key_current;
	std::string 		value_current;

	bool 			last_read_was_key;
	bool 			last_read_was_section;

	unsigned int 		line_number;
	std::ifstream 		inifile_ifs;
	std::string 		inifile_name;
};

}

#endif // __INCLUDED_FILESYSTEM_INIFILE_H__