/*]  Copyright (c) 2009-2010, Charles McGarvey  [**************************
**]  All rights reserved.
*
* vi:ts=4 sw=4 tw=75
*
* Distributable under the terms and conditions of the 2-clause BSD license;
* see the file COPYING for a complete text of the license.
*
**************************************************************************/

#ifndef _MOOF_SETTINGS_HH_
#define _MOOF_SETTINGS_HH_

/**
 * \file settings.hh
 * Load, store, save program settings.
 */

#include <string>
#include <vector>

#include <boost/algorithm/string.hpp>

#include <moof/script.hh>


namespace moof {


class settings
{
public:

	settings(int argc, char* argv[], const std::string& path);

	~settings();

	void parse_args(int argc, char* argv[]);

	void load_files(const std::string& path);
	void load_files(const std::vector<std::string>& path);


	/**
	 * Remove all settings.
	 */
	void clear();

	void save_as(const std::string& path);
	void save() const;


	/**
	 * Get a setting by name.
	 * \param key The name of the setting.
	 * \param value A reference to the variable to store the setting.
	 * \return True if the setting exists, false otherwise.
	 */
	template <class T>
	bool get(const std::string& key, T& value) const;


private:

	mutable script	script_;

	std::string		mUserFile;
};


template <class T>
bool settings::get(const std::string& key, T& value) const
{
	script::slot top = script_[-1];
	script::slot globals = script_.globals();

	std::vector<std::string> fields;
	boost::split(fields, key, boost::is_any_of("."));

	globals.push_copy();

	std::vector<std::string>::iterator it;
	for (it = fields.begin(); it != fields.end(); ++it)
	{
		if (top.is_table())
		{
			top.push_field(*it);
		}
		else
		{
			script_.clear_stack();
			return false;
		}
	}

	bool got = top.get(value);
	script_.clear_stack();
	return got;
}


} // namepsace moof

#endif // _MOOF_SETTINGS_HH_