/*
	sys_win.c

	(description)

	Copyright (C) 1996-1997  Id Software, Inc.

	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:

		Free Software Foundation, Inc.
		59 Temple Place - Suite 330
		Boston, MA  02111-1307, USA

	$Id$
*/

#ifdef HAVE_CONFIG_H
# include "config.h"
#endif

#include <stdlib.h>
#include <ctype.h>
#include <winsock.h>
#include <conio.h>

#include "qargs.h"
#include "cvar.h"
#include "server.h"
#include "sys.h"


qboolean is_server = true;
qboolean WinNT;

extern cvar_t	*sys_nostdout;
cvar_t	*sys_sleep;

/*
================
Sys_FileTime
================
*/
int	Sys_FileTime (char *path)
{
	FILE	*f;
	
	f = fopen(path, "rb");
	if (f)
	{
		fclose(f);
		return 1;
	}
	
	return -1;
}


/*
================
Sys_Error
================
*/
void Sys_Error (char *error, ...)
{
	va_list		argptr;
	char		text[1024];

	va_start (argptr,error);
	vsnprintf (text, sizeof(text), error,argptr);
	va_end (argptr);

//    MessageBox(NULL, text, "Error", 0 /* MB_OK */ );
	printf ("ERROR: %s\n", text);

	exit (1);
}


/*
================
Sys_ConsoleInput
================
*/
char *Sys_ConsoleInput (void)
{
	static char	text[256];
	static int		len;
	int		c;

	// read a line out
	while (kbhit())
	{
		c = _getch();
		putch (c);
		if (c == '\r')
		{
			text[len] = 0;
			putch ('\n');
			len = 0;
			return text;
		}
		if (c == 8)
		{
			if (len)
			{
				putch (' ');
				putch (c);
				len--;
				text[len] = 0;
			}
			continue;
		}
		text[len] = c;
		len++;
		text[len] = 0;
		if (len == sizeof(text))
			len = 0;
	}

	return NULL;
}

/*
================
Sys_Quit
================
*/
void Sys_Quit (void)
{
	exit (0);
}

/*
=============
Sys_Init

Quake calls this so the system can register variables before host_hunklevel
is marked
=============
*/
void Sys_Init (void)
{
	OSVERSIONINFO	vinfo;

	sys_nostdout = Cvar_Get("sys_nostdout", "0", CVAR_NONE, "None");
	sys_sleep = Cvar_Get("sys_sleep", "8", CVAR_NONE, "None");

	// make sure the timer is high precision, otherwise
	// NT gets 18ms resolution
	timeBeginPeriod( 1 );

	vinfo.dwOSVersionInfoSize = sizeof(vinfo);

	if (!GetVersionEx (&vinfo))
		Sys_Error ("Couldn't get OS info");

	if ((vinfo.dwMajorVersion < 4) ||
		(vinfo.dwPlatformId == VER_PLATFORM_WIN32s))
	{
		Sys_Error (PROGRAM " requires at least Win95 or NT 4.0");
	}

	if (vinfo.dwPlatformId == VER_PLATFORM_WIN32_NT)
		WinNT = true;
	else
		WinNT = false;
}

/*
==================
main

==================
*/
char	*newargv[256];

int main (int argc, char **argv)
{
	quakeparms_t	parms;
	double			newtime, time, oldtime;
	struct timeval	timeout;
	fd_set			fdset;
	int				t;
	int				sleep_msec;

	COM_InitArgv (argc, argv);
	
	parms.argc = com_argc;
	parms.argv = com_argv;

	parms.memsize = 16*1024*1024;

	if ((t = COM_CheckParm ("-heapsize")) != 0 &&
		t + 1 < com_argc)
		parms.memsize = atoi (com_argv[t + 1]) * 1024;

	if ((t = COM_CheckParm ("-mem")) != 0 &&
		t + 1 < com_argc)
		parms.memsize = atoi (com_argv[t + 1]) * 1024 * 1024;

	parms.membase = malloc (parms.memsize);

	if (!parms.membase)
		Sys_Error("Insufficient memory.\n");

	parms.basedir = ".";

	SV_Init (&parms);

	if (COM_CheckParm ("-nopriority"))
	{
		Cvar_Set (sys_sleep, "0");
	}
	else
	{
		if ( ! SetPriorityClass (GetCurrentProcess(), HIGH_PRIORITY_CLASS))
			Con_Printf ("SetPriorityClass() failed\n");
		else
			Con_Printf ("Process priority class set to HIGH\n");
	}

	// sys_sleep > 0 seems to cause packet loss on WinNT (why?)
	if (WinNT)
		Cvar_Set (sys_sleep, "0");

// run one frame immediately for first heartbeat
	SV_Frame (0.1);		

//
// main loop
//
	oldtime = Sys_DoubleTime () - 0.1;
	while (1)
	{
	// Now we want to give some processing time to other applications,
	// such as qw_client, running on this machine.
		sleep_msec = sys_sleep->value;
		if (sleep_msec > 0)
		{
			if (sleep_msec > 13)
				sleep_msec = 13;
			Sleep (sleep_msec);
		}

	// select on the net socket and stdin
	// the only reason we have a timeout at all is so that if the last
	// connected client times out, the message would not otherwise
	// be printed until the next event.
		FD_ZERO(&fdset);
		FD_SET(net_socket, &fdset);
		timeout.tv_sec = 0;
		timeout.tv_usec = 100;
		if (select (net_socket+1, &fdset, NULL, NULL, &timeout) == -1)
			continue;

	// find time passed since last cycle
		newtime = Sys_DoubleTime ();
		time = newtime - oldtime;
		oldtime = newtime;
		
		SV_Frame (time);				
	}	

	return true;
}