#ifndef LOG_H
#define LOG_H
#include <string>
#include <cstddef>

namespace nitrokey {
namespace log {

enum class Loglevel : int {
	DEBUG_L2,
	DEBUG,
	INFO,
	WARNING,
	ERROR
};

class LogHandler {
public:
	virtual void print(const std::string &, Loglevel lvl) = 0;

protected:
	std::string loglevel_to_str(Loglevel);
};

class StdlogHandler : public LogHandler {
public:
	virtual void print(const std::string &, Loglevel lvl);
};

extern StdlogHandler stdlog_handler;

class Log {
public:
	Log()
	: mp_loghandler(&stdlog_handler), m_loglevel(Loglevel::WARNING) {}

	static Log &instance() {
		if (mp_instance == NULL)
			mp_instance = new Log;
		return *mp_instance;
	}

	void operator()(const std::string &, Loglevel);

	void set_loglevel(Loglevel lvl) {
		m_loglevel = lvl;
	}

	void set_handler(LogHandler *handler) {
		mp_loghandler = handler;
	}

private:
	Loglevel m_loglevel;
	LogHandler *mp_loghandler;

	static Log *mp_instance;
};

}
}

#endif