//#ifndef __LOG_H__
//#define __LOG_H__

#include <sstream>
#include <string>
#include <stdio.h>

#define STRINGIFY(x) #x
#define TOSTRING(x) STRINGIFY(x)
#define MYCONCAT(x,y)  
#define __AT__ string(__FILE__) + string("::") + string(__func__) + string("(): ")

//":" TOSTRING(__LINE__)

/*
void error(const char *location, const char *msg){
  printf("Error at %s: %s\n", location, msg);
}
*/

inline std::string NowTime();

enum TLogLevel {logERROR, logWARNING, logINFO, logDEBUG, logDEBUG1, logDEBUG2, logDEBUG3, logDEBUG4};

template <typename T> class Log{
 public:
	Log();
	virtual ~Log();
	std::ostringstream& Get(TLogLevel level = logINFO);
	static TLogLevel& ReportingLevel();
	static std::string ToString(TLogLevel level);
	static TLogLevel FromString(const std::string& level);
 protected:
	std::ostringstream os;
 private:
	Log(const Log&);
	Log& operator =(const Log&);
};


class Output2FILE {
public:
    static FILE*& Stream();
    static void Output(const std::string& msg);
};

#if defined(WIN32) || defined(_WIN32) || defined(__WIN32__)
#   if defined (BUILDING_FILELOG_DLL)
#       define FILELOG_DECLSPEC   __declspec (dllexport)
#   elif defined (USING_FILELOG_DLL)
#       define FILELOG_DECLSPEC   __declspec (dllimport)
#   else
#       define FILELOG_DECLSPEC
#   endif // BUILDING_DBSIMPLE_DLL
#else
#   define FILELOG_DECLSPEC
#endif // _WIN32

class FILELOG_DECLSPEC FILELog : public Log<Output2FILE> {};
//typedef Log<Output2FILE> FILELog;

#ifndef FILELOG_MAX_LEVEL
#define FILELOG_MAX_LEVEL logDEBUG4
#endif

#define FILE_LOG(level) \
	if (level > FILELOG_MAX_LEVEL) ;				\
	else if (level > FILELog::ReportingLevel() || !Output2FILE::Stream()) ; \
	else FILELog().Get(level)

#if defined(WIN32) || defined(_WIN32) || defined(__WIN32__)

#include <windows.h>



inline std::string NowTime()

{
    const int MAX_LEN = 200;
    char buffer[MAX_LEN];
    if (GetTimeFormatA(LOCALE_USER_DEFAULT, 0, 0, 
            "HH':'mm':'ss", buffer, MAX_LEN) == 0)
        return "Error in NowTime()";

    char result[100] = {0};
    static DWORD first = GetTickCount();
    sprintf(result, "%s.%03ld", buffer, (long)(GetTickCount() - first) % 1000); 
    return result;
}

#else

#include <sys/time.h>

inline std::string NowTime()
{
    char buffer[11];
    time_t t;
    time(&t);
    tm r = {0};
    strftime(buffer, sizeof(buffer), "%X", localtime_r(&t, &r));
    struct timeval tv;
    gettimeofday(&tv, 0);
    char result[100] = {0};
    sprintf(result, "%s.%03ld", buffer, (long)tv.tv_usec / 1000); 
    return result;
}

#endif //WIN32


template <typename T> Log<T>::Log(){}

template <typename T> std::ostringstream& Log<T>::Get(TLogLevel level)
{
    os << "- " << NowTime();
    os << " " << ToString(level) << ": ";
    os << std::string(level > logDEBUG ? level - logDEBUG : 0, '\t');
    return os;
}

template <typename T> Log<T>::~Log()
{
    os << std::endl;
    T::Output( os.str());
}

template <typename T> TLogLevel& Log<T>::ReportingLevel()
{
    static TLogLevel reportingLevel = logDEBUG4;
    return reportingLevel;
}

template <typename T> std::string Log<T>::ToString(TLogLevel level)
{
	static const char* const buffer[] = {"ERROR", "WARNING", "INFO", "DEBUG", "DEBUG1", "DEBUG2", "DEBUG3", "DEBUG4"};
    return buffer[level];
}

template <typename T>
TLogLevel Log<T>::FromString(const std::string& level)
{
    if (level == "DEBUG4")
        return logDEBUG4;
    if (level == "DEBUG3")
        return logDEBUG3;
    if (level == "DEBUG2")
        return logDEBUG2;
    if (level == "DEBUG1")
        return logDEBUG1;
    if (level == "DEBUG")
        return logDEBUG;
    if (level == "INFO")
        return logINFO;
    if (level == "WARNING")
        return logWARNING;
    if (level == "ERROR")
        return logERROR;
    Log<T>().Get(logWARNING) << "Unknown logging level '" << level << "'. Using INFO level as default.";
    return logINFO;
}


inline FILE*& Output2FILE::Stream()
{
    static FILE* pStream = stderr;
    return pStream;
}

inline void Output2FILE::Output(const std::string& msg)
{   
    FILE* pStream = Stream();
    if (!pStream)
        return;
    fprintf(pStream, "%s", msg.c_str());
    fflush(pStream);
}

#if defined(WIN32) || defined(_WIN32) || defined(__WIN32__)
#   if defined (BUILDING_FILELOG_DLL)
#       define FILELOG_DECLSPEC   __declspec (dllexport)
#   elif defined (USING_FILELOG_DLL)
#       define FILELOG_DECLSPEC   __declspec (dllimport)
#   else
#       define FILELOG_DECLSPEC
#   endif // BUILDING_DBSIMPLE_DLL
#else
#   define FILELOG_DECLSPEC
#endif // _WIN32



//#endif //__LOG_H__