#ifndef LOG_SPKA2JY7
#define LOG_SPKA2JY7

#include "macro.h"
#include <boost/log/trivial.hpp>
#include <string>

namespace ns_log
{

void GetTrace();
typedef boost::log::trivial::severity_level LogLevel;
inline std::string &MsgPrefix()
{
	thread_local std::string prefix;
	return prefix;
}
inline int MsgIndent(int offset)
{
	thread_local int indent = 0;
	indent += offset;
	if (indent > 0) {
		MsgPrefix() = std::string(indent, ' ');
	} else {
		MsgPrefix().clear();
	}
	return indent;
}
std::string TimeStamp();
std::string LogPrefix(LogLevel level);
void AddLogRaw(const std::string &file_ptn, bool flush = true, bool with_console = false);
void AddLog(const std::string &file_ptn, bool flush = true, bool with_console = false);
LogLevel ResetLogLevel(LogLevel level, bool log_this = true);
LogLevel GetLogLevel();

} // namespace ns_log

#define LOG_WITH_PREFIX(severity) BOOST_LOG_TRIVIAL(severity) << ns_log::LogPrefix(boost::log::trivial::severity)

#define LOG__TRACE() LOG_WITH_PREFIX(trace)
#define LOG__DEBUG() LOG_WITH_PREFIX(debug)
#define LOG__INFO() LOG_WITH_PREFIX(info)
#define LOG__WARNING() LOG_WITH_PREFIX(warning)
#define LOG__ERROR() LOG_WITH_PREFIX(error)
#define LOG__FATAL() LOG_WITH_PREFIX(fatal)

#ifndef LOG_TRACE
#define LOG_TRACE() LOG__TRACE()
#endif

#ifndef LOG_DEBUG
#define LOG_DEBUG() LOG__DEBUG()
#endif

#ifndef LOG_INFO
#define LOG_INFO() LOG__INFO()
#endif

#ifndef LOG_WARNING
#define LOG_WARNING() LOG__WARNING()
#endif

#ifndef LOG_ERROR
#define LOG_ERROR() LOG__ERROR()
#endif

#ifndef LOG_FATAL
#define LOG_FATAL() LOG__FATAL()
#endif

#define LOG_POS() LOG__DEBUG() << __FILE__ << " +" << __LINE__ << ": "

// usage:
// LOG__WARNING() << "warning msg ...";
// LOG__ERROR() << "error msg ...";

namespace ns_log
{
namespace impl
{
using namespace boost::log::trivial;
class FuncLog
{
	const char *name_;

public:
	FuncLog(const char *name) :
	    name_(name)
	{
		LOG__DEBUG() << ">>> " << name_;
		if (GetLogLevel() <= debug) {
			MsgIndent(2);
		}
	}
	~FuncLog()
	{
		if (GetLogLevel() <= debug) {
			MsgIndent(-2);
		}
		LOG__DEBUG() << "<// " << name_;
	}
};
} // namespace impl
} // namespace ns_log

#if defined(__GNUG__)
#define LOG_FUNCTION ns_log::impl::FuncLog JOIN(log_func_, JOIN(__LINE__, _))(__PRETTY_FUNCTION__)
#else
#define LOG_FUNCTION ns_log::impl::FuncLog JOIN(log_func_, JOIN(__LINE__, _))(__FUNCTION__)
#endif

#endif // end of include guard: LOG_SPKA2JY7