/*]  Copyright (c) 2009-2011, Charles McGarvey  [*****************************
**]  All rights reserved.
*
* Distributable under the terms and conditions of the 2-clause BSD license;
* see the file COPYING for a complete text of the license.
*
*****************************************************************************/

#if HAVE_INCLUDE_H
#include "config.h"
#endif

#include <fstream>

#if PLATFORM_POSIX
#include <termios.h>
#else
inline int isatty(int dummy) { return 0; }
#endif

#include "log.hh"
#include "script.hh"


namespace moof {


enum log::level log::global_level_ = log::info;


void log::level(enum level level)
{
	global_level_ = level;
}

enum log::level log::level()
{
	return global_level_;
}

log::log(enum level level) :
	level_(level)
{
	if (isatty(1) == 0)
		switch (level)
		{
		case log::error:	prefix_ = "  error: ";	break;
		case log::warning:	prefix_ = "warning: ";	break;
		case log::info:		prefix_ = "   info: ";	break;
		case log::debug:	prefix_ = "  debug: ";	break;
		case log::none:		break;
		}
	else
		switch (level)
		{
		case log::error:	prefix_ = "\033[30;101m  error: ";
					break;
		case log::warning:	prefix_ = "\033[30;103mwarning: ";
					break;
		case log::info:		prefix_ = "   info: ";
					break;
		case log::debug:	prefix_ = "\033[2m  debug: ";
		case log::none:		break;
		}
}

std::ostream& operator << (class log& log, log::endl_ endl)
{
	if (log::global_level_ < log.level_) return null_log;
	if (isatty(1) == 0) return moof::log << std::endl;
	return moof::log << "\033[0m" << std::endl;
}

std::ostream& operator << (std::ostream& stream, log::endl_ endl)
{
	if (isatty(1) == 0) return stream << std::endl;
	return stream << "\033[0m" << std::endl;
}

std::ostream& log(std::cout);

static std::ofstream null_log_;
std::ostream& null_log(null_log_);

// These objects are intentionally not deconstructed so that logging will
// still be available after this module has been cleaned up.
class log& log_error(*new class log(log::error));
class log& log_warning(*new class log(log::warning));
class log& log_info(*new class log(log::info));
class log& log_debug(*new class log(log::debug));

static int log_script(script& script, enum log::level level)
{
	static class log* logs[] = {
		0,
		&log_error,
		&log_warning,
		&log_info,
		&log_debug
	};

	script::slot param = script[1];

	while (!param.is_none()) {
		(*logs[level])(param);
		++param.index;
	}

	return 0;
}

void log::import(script& script)
{
	script.import_function("LogError",
			boost::bind(log_script, _1, log::error));
	script.import_function("LogWarning",
			boost::bind(log_script, _1, log::warning));
	script.import_function("LogInfo",
			boost::bind(log_script, _1, log::info));
	script.import_function("print",
			boost::bind(log_script, _1, log::info));
	script.import_function("LogDebug",
			boost::bind(log_script, _1, log::debug));
}


} // namespace moof