//=============================================================================
//
//   File : kvi_time.cpp
//   Creation date : Tue Sep 25 17:35:13 2001 GMT by Szymon Stefanek
//
//   This file is part of the KVirc irc client distribution
//   Copyright (C) 2001-2004 Szymon Stefanek (pragma at kvirc dot net)
//
//   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 opinion) 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. ,59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
//
//=============================================================================

#define __KVILIB__


#include "kvi_time.h"
#include "kvi_qstring.h"
#include "kvi_locale.h"

#ifdef COMPILE_ON_WINDOWS
	#include <windows.h> // GetSystemTime

	// Call SystemTimeToFileTime to copy the system time to a FILETIME structure.
	// Call GetSystemTime to get the current system time to pass to SystemTimeToFileTime.
	// Copy the contents of the FILETIME structure to a ULARGE_INTEGER structure.
	// Initialize a SYSTEMTIME structure with the date and time of the first second of January 1, 1970.
	// Call SystemTimeToFileTime, passing the SYSTEMTIME structure initialized in Step 3 to the call.
	// Copy the contents of the FILETIME structure returned by SystemTimeToFileTime in Step 4 to
	// a second ULARGE_INTEGER. The copied value should be greater than or equal to the value copied
	// in Step 2. Subtract the 64-bit value in the ULARGE_INTEGER structure initialized in Step 2
	// from the 64-bit value of the ULARGE_INTEGER structure initialized in Step 5.
	// This produces a value in 100-nanosecond intervals since January 1, 1970.
	// To convert this value to seconds, divide by 10,000,000.

	// buah buah buahhhh lol ghgh :DDDDDDDDD

	void kvi_gettimeofday(struct timeval * tmv,struct timezone *)
	{
		SYSTEMTIME st;
		GetSystemTime(&st);

		// this is simply fucked up..
		// to minimize the possibility of wrapping we use also the day field.
		// we actually give something that is near the number of seconds from the beginning
		// of the current month...
		// We cannot use the wMonth field since the months have variable length :/
		tmv->tv_sec = (st.wDay * 86400) + (st.wHour * 3600) + (st.wMinute * 60) + (st.wSecond);
		tmv->tv_usec = st.wMilliseconds * 1000;
	}
#endif

KviMSecTimeInterval::KviMSecTimeInterval()
{
	m_uReferenceSecs = 0;
	m_uReferenceUSecs = 0;
}


unsigned long KviMSecTimeInterval::mark()
{
	struct timeval tmv;
	kvi_gettimeofday(&tmv,0);
	unsigned long uDiff = ((((unsigned long)(tmv.tv_sec)) - m_uReferenceSecs) * 1000);
	if(((unsigned long)(tmv.tv_usec)) > m_uReferenceUSecs)uDiff += (((unsigned long)(tmv.tv_usec) - m_uReferenceUSecs) / 1000);
	else uDiff -= ((m_uReferenceUSecs - (unsigned long)(tmv.tv_usec)) / 1000);
	m_uReferenceSecs = (unsigned long)tmv.tv_sec;
	m_uReferenceUSecs = (unsigned long)tmv.tv_usec;
	return uDiff;
}

namespace KviTimeUtils
{
	void secondsToDaysHoursMinsSecs(unsigned int uSecs,
		unsigned int * uD,unsigned int * uH,unsigned int * uM,unsigned int * uS)
	{
		*uD = uSecs / 86400;
		uSecs = uSecs % 86400;
		*uH = uSecs / 3600;
		uSecs = uSecs % 3600;
		*uM = uSecs / 60;
		*uS = uSecs % 60;
	}
	
	QString formatTimeInterval(unsigned int uSeconds,int iFlags)
	{
		unsigned int d,h,m,s;
		secondsToDaysHoursMinsSecs(uSeconds,&d,&h,&m,&s);
		QString ret;
		// the following tricks maybe will help translators a bit...
		if(iFlags & FillWithHypens)
		{
			ret = __tr2qs("- d -- h -- m -- s");
		} else {
			if((iFlags & NoLeadingEmptyIntervals) && (d == 0))
			{
				if(h > 0)
				{
					if(iFlags & NoLeadingZeroes)
						KviQString::sprintf(ret,__tr2qs("%u h %u m %u s"),h,m,s);
					else
						KviQString::sprintf(ret,__tr2qs("%u h %u%u m %u%u s"),h,m / 10,m % 10,s / 10,s % 10);
				} else {
					if(m > 0)
					{
						if(iFlags & NoLeadingZeroes)
							KviQString::sprintf(ret,__tr2qs("%u m %u s"),m,s);
						else
							KviQString::sprintf(ret,__tr2qs("%u m %u%u s"),m,s / 10,s % 10);
					} else {
						KviQString::sprintf(ret,__tr2qs("%u s"),s);
					}
				}
			} else {
				if(iFlags & NoLeadingZeroes)
					KviQString::sprintf(ret,__tr2qs("%u d %u h %u m %u s"),d,h,m,s);
				else
					KviQString::sprintf(ret,__tr2qs("%u d %u%u h %u%u m %u%u s"),d,h / 10,h % 10,m / 10,m % 10,s / 10,s % 10);
			}
		}
		return ret;
	}

}
