#include "Globals.h"  // NOTE: MSVC stupidness requires this to be the same across all modules

#include <time.h>
#include "Log.h"





cMCLogger * cMCLogger::s_MCLogger = NULL;

#ifdef _WIN32
	#include <io.h>  // Needed for _isatty(), not available on Linux
	
	HANDLE g_Console = GetStdHandle(STD_OUTPUT_HANDLE);
	WORD g_DefaultConsoleAttrib = 0x07;
#elif defined (__linux) && !defined(ANDROID_NDK)
	#include <unistd.h>  // Needed for isatty() on Linux
#endif





cMCLogger * cMCLogger::GetInstance(void)
{
	return s_MCLogger;
}





cMCLogger::cMCLogger(void):
	m_ShouldColorOutput(false)
{
	AString FileName;
	Printf(FileName, "LOG_%d.txt", (int)time(NULL));
	InitLog(FileName);
}





cMCLogger::cMCLogger(const AString & a_FileName)
{
	InitLog(a_FileName);
}





cMCLogger::~cMCLogger()
{
	m_Log->Log("--- Stopped Log ---\n");
	delete m_Log;
	m_Log = NULL;
	if (this == s_MCLogger)
	{
		s_MCLogger = NULL;
	}
}





void cMCLogger::InitLog(const AString & a_FileName)
{
	m_Log = new cLog(a_FileName);
	m_Log->Log("--- Started Log ---\n");

	s_MCLogger = this;

	#ifdef _WIN32
		// See whether we are writing to a console the default console attrib:
		m_ShouldColorOutput = (_isatty(_fileno(stdin)) != 0);
		if (m_ShouldColorOutput)
		{
			CONSOLE_SCREEN_BUFFER_INFO sbi;
			GetConsoleScreenBufferInfo(g_Console, &sbi);
			g_DefaultConsoleAttrib = sbi.wAttributes;
		}
	#elif defined (__linux) && !defined(ANDROID_NDK)
		m_ShouldColorOutput = isatty(fileno(stdout));
		// TODO: Check if the terminal supports colors, somehow?
	#endif
}





void cMCLogger::LogSimple(const char * a_Text, eLogLevel a_LogLevel)
{
	switch (a_LogLevel)
	{
		case llRegular:
		{
			LOG("%s", a_Text);
			break;
		}
		case llInfo:
		{
			LOGINFO("%s", a_Text);
			break;
		}
		case llWarning:
		{
			LOGWARN("%s", a_Text);
			break;
		}
		case llError:
		{
			LOGERROR("%s", a_Text);
			break;
		}
	}
}





void cMCLogger::Log(const char * a_Format, va_list a_ArgList)
{
	cCSLock Lock(m_CriticalSection);
	SetColor(csRegular);
	m_Log->Log(a_Format, a_ArgList);
	ResetColor();
	puts("");
}





void cMCLogger::Info(const char * a_Format, va_list a_ArgList)
{
	cCSLock Lock(m_CriticalSection);
	SetColor(csInfo);
	m_Log->Log(a_Format, a_ArgList);
	ResetColor();
	puts("");
}





void cMCLogger::Warn(const char * a_Format, va_list a_ArgList)
{
	cCSLock Lock(m_CriticalSection);
	SetColor(csWarning);
	m_Log->Log(a_Format, a_ArgList);
	ResetColor();
	puts("");
}





void cMCLogger::Error(const char * a_Format, va_list a_ArgList)
{
	cCSLock Lock(m_CriticalSection);
	SetColor(csError);
	m_Log->Log(a_Format, a_ArgList);
	ResetColor();
	puts("");
}





void cMCLogger::SetColor(eColorScheme a_Scheme)
{
	if (!m_ShouldColorOutput)
	{
		return;
	}
	#ifdef _WIN32
		WORD Attrib = 0x07;  // by default, gray on black
		switch (a_Scheme)
		{
			case csRegular: Attrib = 0x07; break;  // Gray on black
			case csInfo:    Attrib = 0x0e; break;  // Yellow on black
			case csWarning: Attrib = 0x0c; break;  // Read on black
			case csError:   Attrib = 0xc0; break;  // Black on red
			default: ASSERT(!"Unhandled color scheme");
		}
		SetConsoleTextAttribute(g_Console, Attrib);
	#elif defined(__linux) && !defined(ANDROID_NDK)
		switch (a_Scheme)
		{
			case csRegular: printf("\x1b[0m");         break;  // Whatever the console default is
			case csInfo:    printf("\x1b[33;1m");      break;  // Yellow on black
			case csWarning: printf("\x1b[31;1m");      break;  // Red on black
			case csError:   printf("\x1b[1;33;41;1m"); break;  // Yellow on red
			default: ASSERT(!"Unhandled color scheme");
		}
	#endif
}





void cMCLogger::ResetColor(void)
{
	if (!m_ShouldColorOutput)
	{
		return;
	}
	#ifdef _WIN32
		SetConsoleTextAttribute(g_Console, g_DefaultConsoleAttrib);
	#elif defined(__linux) && !defined(ANDROID_NDK)
		printf("\x1b[0m");
	#endif
}





////////////////////////////////////////////////////////////////////////////////
// Global functions

void LOG(const char* a_Format, ...)
{
	va_list argList;
	va_start(argList, a_Format);
	cMCLogger::GetInstance()->Log( a_Format, argList);
	va_end(argList);
}

void LOGINFO(const char* a_Format, ...)
{
	va_list argList;
	va_start(argList, a_Format);
	cMCLogger::GetInstance()->Info( a_Format, argList);
	va_end(argList);
}

void LOGWARN(const char* a_Format, ...)
{
	va_list argList;
	va_start(argList, a_Format);
	cMCLogger::GetInstance()->Warn( a_Format, argList);
	va_end(argList);
}

void LOGERROR(const char* a_Format, ...)
{
	va_list argList;
	va_start(argList, a_Format);
	cMCLogger::GetInstance()->Error( a_Format, argList);
	va_end(argList);
}