#ifndef _LOGGER_H_
#define _LOGGER_H_

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

class logger
{
private:
    std::stringstream _logLine;

public:
    logger();
    
    template<typename... Args> void log(const char* s, const Args&... 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_