/*
	This file is part of EqualizerAPO, a system-wide equalizer.
	Copyright (C) 2012  Jonas Thedering

	This program is free software; you can redistribute it and/or modify
	it under the terms of the GNU General Public License as published by
	the Free Software Foundation; either version 2 of the License, or
	(at your option) any later version.

	This program is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
	GNU General Public License for more details.

	You should have received a copy of the GNU General Public License along
	with this program; if not, write to the Free Software Foundation, Inc.,
	51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/

#include "stdafx.h"
#include <cstdarg>
#define WIN32_LEAN_AND_MEAN
#include <windows.h>

#include "RegistryHelper.h"
#include "LogHelper.h"

using namespace std;

bool LogHelper::initialized = false;
wstring LogHelper::logPath;
bool LogHelper::enableTrace = false;
FILE* LogHelper::presetFP = NULL;
bool LogHelper::compact = false;
bool LogHelper::useConsoleColors = false;

void LogHelper::log(const char* file, int line, const void* caller, bool trace, const wchar_t* format, ...)
{
	if(!initialized)
	{
		//Do not try to initialize again, even in case of error
		initialized = true;

		wchar_t temp[255];
		GetTempPathW(sizeof(temp)/sizeof(wchar_t), temp);

		logPath = temp;
		logPath += L"EqualizerAPO.log";

		try
		{
			if(RegistryHelper::readValue(APP_REGPATH, L"EnableTrace") != L"false")
				enableTrace = true;
		}
		catch(RegistryException e)
		{
			LogFStatic(L"%s", e.getMessage());
		}
	}

	if(trace && !enableTrace)
		return;

	FILE* fp;
	if(presetFP == NULL)
	{
		errno_t err = _wfopen_s(&fp, logPath.c_str(), L"at");
		if(err != 0)
			return;
	}
	else
	{
		fp = presetFP;
	}

	if(useConsoleColors)
	{
		HANDLE con = GetStdHandle(STD_OUTPUT_HANDLE);
		if(trace)
			SetConsoleTextAttribute(con, 2); // Set console color to green
		else
			SetConsoleTextAttribute(con, 12); // Set console color to red
	}

	if(!compact)
	{
		SYSTEMTIME ___st;
		GetLocalTime(&___st);
		DWORD threadId = GetCurrentThreadId();
		fwprintf(fp, L"%04d-%02d-%02d %02d:%02d:%02d.%03d %d %08X (%S:%d): ",
			___st.wYear, ___st.wMonth, ___st.wDay, ___st.wHour, ___st.wMinute, ___st.wSecond, ___st.wMilliseconds, threadId, (DWORD)(unsigned long long)caller, file, line);
	}

	if(trace)
		fwprintf(fp, L"(TRACE) ");

	va_list varArgs;
	va_start(varArgs, format);
	vfwprintf(fp, format, varArgs);
	va_end(varArgs);

	fwprintf(fp, L"\n");

	if(useConsoleColors)
	{
		HANDLE con = GetStdHandle(STD_OUTPUT_HANDLE);
		SetConsoleTextAttribute(con, 7); // Set console color to light grey (default)
	}

	if(presetFP == NULL)
		fclose(fp);
}

void LogHelper::reset()
{
	initialized = false;
	logPath = L"";
	enableTrace = false;
}

void LogHelper::set(FILE* fp, bool enableTrace, bool compact, bool useConsoleColors)
{
	LogHelper::initialized = true;

	LogHelper::presetFP = fp;
	LogHelper::enableTrace = enableTrace;
	LogHelper::compact = compact;
	LogHelper::useConsoleColors = useConsoleColors;
}
