#include <time.h>

#include "sourcemod.h"

#include "sourcemm_api.h"

#include "CLogger.h"

#include "systems/Librarysys.h"

#include "sm_version.h"

CLogger g_Logger;

void CLogger::OnSourceModStartup(bool late)

{

	//:TODO: read these options from a file, dont hardcode them

	InitLogger(LoggingMode_Daily, true);

}

void CLogger::OnSourceModAllShutdown()

{

	CloseLogger();

}

void CLogger::_NewMapFile()

{

	if (!m_Active)

	{

		return;

	}

	char _filename[256];

	int i = 0;

	time_t t;

	time(&t);

	tm *curtime = localtime(&t);

	while (true)

	{

		g_LibSys.PathFormat(_filename, sizeof(_filename), "%s/logs/L%02d%02d%03d.log", g_SourceMod.GetSMBaseDir(), curtime->tm_mon + 1, curtime->tm_mday, i);

		FILE *fp = fopen(_filename, "r");

		if (!fp)

		{

			break;

		}

		fclose(fp);

		i++;

	}

	m_NrmFileName.assign(_filename);

	FILE *fp = fopen(m_NrmFileName.c_str(), "w");

	if (!fp)

	{

		g_SMAPI->ConPrint("[SM] Unexpected fatal logging error. SourceMod logging disabled.\n");

		m_Active = false;

		return;

	} else {

		char date[32];

		strftime(date, sizeof(date), "%m/%d/%Y - %H:%M:%S", curtime);

		fprintf(fp, "L %s: SourceMod log file started (file \"L%02d%02d%03d.log\") (Version \"%s\")\n", date, curtime->tm_mon + 1, curtime->tm_mday, i, SOURCEMOD_VERSION);

		fclose(fp);

	}

}

void CLogger::_CloseFile()

{

	if (!m_Active)

	{

		return;

	}

	FILE *fp = NULL;

	if (!m_NrmFileName.empty())

	{

		fp = fopen(m_NrmFileName.c_str(), "r+");

		if (fp)

		{

			fseek(fp, 0, SEEK_END);

			LogMessage("Log file closed.");

			fclose(fp);

		}

		m_NrmFileName.clear();

	}

	if (!m_ErrMapStart)

	{

		return;

	}

	fp = fopen(m_ErrFileName.c_str(), "r+");

	if (fp)

	{

		fseek(fp, 0, SEEK_END);

		LogError("Error log file session closed.");

		fclose(fp);

	}

	m_ErrFileName.clear();

}

void CLogger::InitLogger(LoggingMode mode, bool startlogging)

{

	m_mode = mode;

	m_Active = startlogging;

	time_t t;

	time(&t);

	tm *curtime = localtime(&t);

	m_CurDay = curtime->tm_mday;

	char _filename[256];

	g_LibSys.PathFormat(_filename, sizeof(_filename), "%s/logs/errors_%02d%02d%02d.log", g_SourceMod.GetSMBaseDir(), curtime->tm_mon + 1, curtime->tm_mday, curtime->tm_year - 100);

	m_ErrFileName.assign(_filename);

	switch (m_mode)

	{

	case LoggingMode_PerMap:

		{

			if (!startlogging)

			{

				m_DelayedStart = true;

			}

			break;

		}

	case LoggingMode_Daily:

		{

			g_LibSys.PathFormat(_filename, sizeof(_filename), "%s/logs/L%02d%02d.log", g_SourceMod.GetSMBaseDir(), curtime->tm_mon + 1, curtime->tm_mday);

			m_NrmFileName.assign(_filename);

			m_DailyPrintHdr = true;

			break;

		}

	}

}

void CLogger::CloseLogger()

{

	_CloseFile();

}

void CLogger::LogMessage(const char *vafmt, ...)

{

	if (!m_Active)

	{

		return;

	}

	if (m_mode == LoggingMode_HL2)

	{

		va_list ap;

		va_start(ap, vafmt);

		_PrintToHL2Log(vafmt, ap);

		va_end(ap);

		return;

	}

	if (m_DelayedStart)

	{

		m_DelayedStart = false;

		_NewMapFile();

	}

	char msg[3072];

	va_list ap;

	va_start(ap, vafmt);

	vsnprintf(msg, sizeof(msg), vafmt, ap);

	va_end(ap);

	char date[32];

	time_t t;

	time(&t);

	tm *curtime = localtime(&t);

	strftime(date, sizeof(date), "%m/%d/%Y - %H:%M:%S", curtime);

	FILE *fp = NULL;

	if (m_mode == LoggingMode_PerMap)

	{

		fp = fopen(m_NrmFileName.c_str(), "a+");

		if (!fp)

		{

			_NewMapFile();

			fp = fopen(m_NrmFileName.c_str(), "a+");

			if (!fp)

			{

				goto print_error;

			}

		}

	} else {

		if (m_CurDay != curtime->tm_mday)

		{

			char _filename[256];

			g_LibSys.PathFormat(_filename, sizeof(_filename), "%s/logs/L%02d%02d.log", g_SourceMod.GetSMBaseDir(), curtime->tm_mon + 1, curtime->tm_mday);

			m_NrmFileName.assign(_filename);

			m_CurDay = curtime->tm_mday;

			m_DailyPrintHdr = true;

		}

		fp = fopen(m_NrmFileName.c_str(), "a+");

	}

	if (fp)

	{

		if (m_DailyPrintHdr)

		{

			m_DailyPrintHdr = false;

			fprintf(fp, "L %s: SourceMod log file session started (file \"L%02d%02d.log\") (Version \"%s\")\n", date, curtime->tm_mon + 1, curtime->tm_mday, SOURCEMOD_VERSION);

		}

		fprintf(fp, "L %s: %s\n", date, msg);

		fclose(fp);

	} else {

		goto print_error;

	}

	g_SMAPI->ConPrintf("L %s: %s\n", date, msg);

	return;

print_error:

	g_SMAPI->ConPrint("[SM] Unexpected fatal logging error. SourceMod logging disabled.\n");

	m_Active = false;

}

void CLogger::LogError(const char *vafmt, ...)

{

	if (!m_Active)

	{

		return;

	}

	time_t t;

	time(&t);

	tm *curtime = localtime(&t);

	char date[32];

	strftime(date, sizeof(date), "%m/%d/%Y - %H:%M:%S", curtime);

	if (curtime->tm_mday != m_CurDay)

	{

		char _filename[256];

		g_LibSys.PathFormat(_filename, sizeof(_filename), "%s/logs/errors_%02d%02d%02d.log", g_SourceMod.GetSMBaseDir(), curtime->tm_mon + 1, curtime->tm_mday, curtime->tm_year - 100);

		m_ErrFileName.assign(_filename);

		m_CurDay = curtime->tm_mday;

		m_ErrMapStart = false;

	}

	char msg[3072];

	va_list ap;

	va_start(ap, vafmt);

	vsnprintf(msg, sizeof(msg), vafmt, ap);

	va_end(ap);

	FILE *fp = fopen(m_ErrFileName.c_str(), "a+");

	if (fp)

	{

		if (!m_ErrMapStart)

		{

			fprintf(fp, "L %s: SourceMod error session started\n", date);

			fprintf(fp, "L %s: Info (map \"%s\") (log file \"errors_%02d%02d%02d.log\")\n", date, m_CurMapName.c_str(), curtime->tm_mon + 1, curtime->tm_mday, curtime->tm_year - 100);

			m_ErrMapStart = true;

		}

		fprintf(fp, "L %s: %s\n", date, msg);

		fclose(fp);

	} else {

		g_SMAPI->ConPrint("[SM] Unexpected fatal logging error. SourceMod logging disabled.\n");

		m_Active = false;

		return;

	}

	g_SMAPI->ConPrintf("L %s: %s\n", date, msg);

}

void CLogger::MapChange(const char *mapname)

{

	m_CurMapName.assign(mapname);

	switch (m_mode)

	{

	case LoggingMode_Daily:

		{

			LogMessage("-------- Mapchange to %s --------", mapname);

			break;

		}

	case LoggingMode_PerMap:

		{

			_NewMapFile();

			break;

		}

	}

	if (m_ErrMapStart)

	{

		LogError("Error log file session closed.");

	}

	m_ErrMapStart = false;

}

void CLogger::_PrintToHL2Log(const char *fmt, va_list ap)

{

	char msg[3072];

	size_t len;

	len = vsnprintf(msg, sizeof(msg)-2, fmt, ap);

	len = (len >= sizeof(msg)) ? (sizeof(msg) - 2) : len;

	msg[len++] = '\n';

	msg[len] = '\0';

	engine->LogPrint(msg);

}

const char *CLogger::GetLogFileName(LogType type) const

{

	switch (type)

	{

	case LogType_Normal:

		{

			return m_NrmFileName.c_str();

		}

	case LogType_Error:

		{

			return m_ErrFileName.c_str();

		}

	default:

		{

			return "";

		}

	}

}

LoggingMode CLogger::GetLoggingMode() const

{

	return m_mode;

}

void CLogger::EnableLogging()

{

	if (m_Active)

	{

		return;

	}

	m_Active = true;

	LogMessage("Logging enabled manually by user.");

}

void CLogger::DisableLogging()

{

	if (!m_Active)

	{

		return;

	}

	LogMessage("Logging disabled manually by user.");

	m_Active = false;

}