/*]  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/Log.hh>
#include <Moof/Script.hh>


namespace Mf {


class Settings
{
public:

	Settings(int argc, char* argv[], const std::string& path)
	{
		mScript.importBaseLibrary();
		importLogFunctions(mScript);

		parseArgs(argc, argv);
		loadFromFiles(path);
	}

	~Settings();

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

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

	void clear();		// remove all settings

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

	template <class T>
	bool get(const std::string& key, T& value) const;

private:

	mutable Script	mScript;

	std::string		mUserFile;
};


template <class T>
bool Settings::get(const std::string& key, T& value) const
{
	Script::Slot top = mScript[-1];
	Script::Slot globals = mScript.globals();

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

	globals.pushCopy();

	std::vector<std::string>::iterator it;
	for (it = fields.begin(); it != fields.end(); ++it)
	{
		if (top.isTable())
		{
			top.pushField(*it);
		}
		else
		{
			mScript.clearStack();
			return false;
		}
	}

	bool got = top.get(value);
	mScript.clearStack();
	return got;
}


} // namepsace Mf

#endif // _MOOF_SETTINGS_HH_