#ifndef _LOGGER_H_
#define _LOGGER_H_

#include "log_queue.h"

#include <sstream>
#include <stdexcept>
#include <iostream>
#include <atomic>
#include <functional>

class logger
{
private:
	std::atomic<bool> _enabled;
    std::stringstream _logLine;
	log_queue _queue;

public:
    logger();
	
	void set_enabled(bool enabled)
	{
		_enabled = enabled;
	}
    
    template<typename... Args> void log(const char* s, const Args&... args)
    {
		if(_enabled)
		{
			_queue.add_log([this, s, &args...] { 
				_logLine.str(""); 
				log_internal(s, args...); 
			});
		}
    }
    
private:
    void log_internal(const char* s);

    template<typename T, typename... Args> void log_internal(const char* s, const T& value, const Args&... args)
    {
        while (*s)
        {
            if (*s == '%' && *++s != '%')
            {
                _logLine << value;
                return log_internal(s, args...);
            }
            _logLine << *s++;
        }
        throw std::runtime_error("extra arguments provided");
    }
};

extern logger ulog;

#endif // _LOGGER_H_