#pragma once

#include <time.h>
#include <sys/timeb.h>

#include "String.Format.tlh"

#include "ErrorCodeToString.hpp"


#define  __LOG__SimpleLog__

//-----------------------------------------------------------------------------
//		SimpleLog
//-----------------------------------------------------------------------------

class SimpleLog
{
public:
	enum enLogLevel
	{
		enUndefined = 0,
		enDebug = 10,
		enInfo = 20,
		enNotice = 30,
		enWarn = 40,
		enError = 50,
		enFatal = 60
	};

public:
	inline static enLogLevel gLogLevel = enLogLevel::enUndefined;

private:
	FILE * fpLog = nullptr;

	static inline char LogLevelToChar (int level)
	{
//		static char Name [6] = { ' ', ' ', ' ', 'W', 'E', 'F' };
		if (level == enWarn)  return 'W';
		if (level == enError)  return 'E';
		if (level == enFatal)  return 'F';
		return ' ';
	}

public:
	SimpleLog () = default;

	SimpleLog (const char * LogName)
	{
		Open (LogName);
	}

	bool Open (const char * LogName)
	{
		if (fpLog)  fclose (fpLog);

		char AppPath [_MAX_PATH + _MAX_PATH];
		int len = GetModuleFileName (NULL, AppPath, _MAX_PATH);
		len--;
		while (AppPath [len] != '\\')
			AppPath [len--] = '\0';

		struct timeb tp;
		ftime (&tp);
		tm tmNow;
		_localtime64_s (&tmNow, &tp.time);
		auto Y = tmNow.tm_year + 1900;
		auto M = tmNow.tm_mon + 1;
		auto D = tmNow.tm_mday;
		auto H = tmNow.tm_hour;
		auto T = tmNow.tm_min;
		auto S = tmNow.tm_sec;

		char logFileName [_MAX_PATH];

		ECOM::Utility::String::StringFormat (logFileName, _MAX_PATH)
			.Format ("{$}\\Log\\{$}.{$:d04}{$:d02}{$:d02}.log",
				AppPath, LogName, Y, M, D);

		fpLog = fopen (logFileName, "ab+");
		assert (fpLog);
		return (fpLog != NULL);
	}

	void Close ()
	{
		if (fpLog)
			fclose (fpLog);
		fpLog = nullptr;
	}

public:
	template <typename... Args>
	inline int  Force (const char * fmt, Args && ... args)
	{
		return LogOut (enDebug, fmt, std::forward <Args> (args)...);
	}

	template <typename... Args>
	inline int  Debug (const char * fmt, Args && ... args)
	{
		if (gLogLevel > enLogLevel::enDebug)  return 0;
		return LogOut (enDebug, fmt, std::forward <Args> (args)...);
	}

	template <typename... Args>
	inline int  Info (const char * fmt, Args && ... args)
	{
		if (gLogLevel > enLogLevel::enInfo)  return 0;
		return LogOut (enInfo, fmt, std::forward <Args> (args)...);
	}

	template <typename... Args>
	inline int  Notice (const char * fmt, Args && ... args)
	{
		if (gLogLevel > enLogLevel::enNotice)  return 0;
		return LogOut (enInfo, fmt, std::forward <Args> (args)...);
	}

	template <typename... Args>
	inline int  Warn (const char * fmt, Args && ... args)
	{
		if (gLogLevel > enLogLevel::enWarn)  return 0;
		return LogOut (enWarn, fmt, std::forward <Args> (args)...);
	}

	template <typename... Args>
	inline int  Error (const char * fmt, Args && ... args)
	{
		if (gLogLevel > enLogLevel::enError)  return 0;
		return LogOut (enError, fmt, std::forward <Args> (args)...);
	}

	template <typename... Args>
	inline int  Fatal (const char * fmt, Args && ... args)
	{
		if (gLogLevel > enLogLevel::enFatal)  return 0;
		return LogOut (enFatal, fmt, std::forward <Args> (args)...);
	}

	int  Flush (const char * buf, int len)
	{
		assert (buf);
		assert (fpLog);
		if (! fpLog)  return 0;
		auto rc = (int) fwrite (buf, len, 1, fpLog);
		fflush (fpLog);
		return rc;
	}

protected:
	template <typename... Args>
	inline int  LogOut (int Level, const char * fmt, Args && ... args)
	{
		if (! fpLog)  return 0;

		static const int MaxLen = 8192;
		char * buf = new char [MaxLen];

		struct timeb tp;
		ftime (&tp);
		tm tmNow;
		_localtime64_s (&tmNow, &tp.time);
		auto Y = tmNow.tm_year + 1900;
		auto M = tmNow.tm_mon + 1;
		auto D = tmNow.tm_mday;
		auto H = tmNow.tm_hour;
		auto T = tmNow.tm_min;
		auto S = tmNow.tm_sec;

		int len1 = ECOM::Utility::String::StringFormat (buf, MaxLen).Format ("{$} {$:d04}{$:d02}{$:d02} {$:d02}:{$:d02}:{$:d02}:{$:d03} [{$:x04}]  ",
			LogLevelToChar (Level), Y, M, D, H, T, S, tp.millitm, GetCurrentThreadId ());

		int len2 = ECOM::Utility::String::StringFormat (buf+len1, MaxLen-len1).Format (fmt, std::forward <Args> (args)...);
		buf [len1 + len2 + 0] = '\r';
		buf [len1 + len2 + 1] = '\n';
		return Flush (buf, len1+len2+2 );
	}

};



//-----------------------------------------------------------------------------
//	mLog 是对 gLogger 的简单封装
//	mLog 可以理解为 myLog, 或者 mainLog 的短名称
//-----------------------------------------------------------------------------

namespace mLog
{
	inline SimpleLog gLogger;

	inline std::string ErrorCodeToString (DWORD errCode)
	{
		return ::ErrorCodeToString (errCode);
	}

	inline void Flush (const char * buf, int len)
	{
		gLogger.Flush (buf, len);
	}

	inline void NewLine ()
	{
		gLogger.Flush ("\r\n", 2);
	}

	template <typename... Args>
	inline void Force (const char * fmt, Args && ... args)
	{
		// assert (gLogger);
//		if (! gLogger)  return;
		gLogger.Force (fmt, std::forward <Args> (args)...);
	}


	template <typename... Args>
	inline void Trace (const char * fmt, Args && ... args)
	{
		// assert (gLogger);
//		if (! gLogger)  return;
		gLogger.Trace (fmt, std::forward <Args> (args)...);
	}

	template <typename... Args>
	inline void Debug (const char * fmt, Args && ... args)
	{
		// assert (gLogger);
//		if (! gLogger)  return;
		gLogger.Debug (fmt, std::forward <Args> (args)...);
	}

	template <typename... Args>
	inline void Info (const char * fmt, Args && ... args)
	{
		// assert (gLogger);
//		if (! gLogger)  return;
		gLogger.Info (fmt, std::forward <Args> (args)...);
	}

	template <typename... Args>
	inline void Notice (const char * fmt, Args && ... args)
	{
		// assert (gLogger);
//		if (! gLogger)  return;
		gLogger.Notice (fmt, std::forward <Args> (args)...);
	}

	template <typename... Args>
	inline void Warn (const char * fmt, Args && ... args)
	{
		// assert (gLogger);
//		if (! gLogger)  return;
		gLogger.Warn (fmt, std::forward <Args> (args)...);
	}
	template <typename... Args>
	inline void Warning (const char * fmt, Args && ... args)
	{
		// assert (gLogger);
//		if (! gLogger)  return;
		gLogger.Warn (fmt, std::forward <Args> (args)...);
	}

	template <typename... Args>
	inline void Error (const char * fmt, Args && ... args)
	{
		// assert (gLogger);
//		if (! gLogger)  return;
		gLogger.Error (fmt, std::forward <Args> (args)...);
	}

	template <typename... Args>
	inline void Fatal (const char * fmt, Args && ... args)
	{
		// assert (gLogger);
//		if (! gLogger)  return;
		gLogger.Fatal (fmt, std::forward <Args> (args)...);
	}

	inline bool Open (const char * LogName)
	{
		return gLogger.Open (LogName);
	}

	inline void Close ()
	{
		// assert (gLogger);
//		if (! gLogger)  return;
		gLogger.Close ();
	}
};