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

*/
#include <sys/types.h>
#include "qwsvdef.h"

#undef malloc

#ifdef NeXT
#include <libc.h>
#endif

#include <sys/stat.h>
#include <unistd.h>
#include <sys/time.h>
#include <errno.h>
#include <fcntl.h>

cvar_t	sys_nostdout = {"sys_nostdout","0"};
cvar_t	sys_extrasleep = {"sys_extrasleep","0"};
cvar_t	sys_maxtic = {"sys_maxtic", "100"};

qboolean	stdin_ready;

/*
===============================================================================

				REQUIRED SYS FUNCTIONS

===============================================================================
*/

/*
============
Sys_FileTime

returns -1 if not present
============
*/
int	Sys_FileTime (char *path)
{
	struct	stat	buf;
	
	if (stat (path,&buf) == -1)
		return -1;
	
	return buf.st_mtime;
}


/*
============
Sys_mkdir

============
*/
void Sys_mkdir (char *path)
{
	if (mkdir (path, 0777) != -1)
		return;
	if (errno != EEXIST)
		Sys_Error ("mkdir %s: %s",path, strerror(errno)); 
}

qboolean Sys_remove (char *path)
{
	return system(va("rm \"%s\"", path));
}

#ifdef SHADERS
int Sys_EnumerateFiles (char *gpath, char *match, int (*func)(char *, int, void *), void *parm)
{
#include <dirent.h>
	DIR *dir;
	struct dirent *ent;
	dir = opendir(gpath);
	if (!dir)
	{
		Con_Printf("Failed to open dir");
		return true;
	}
	do
	{
		ent = readdir(dir);	//FIXME: no wild card comparisons.
		if (!ent)
			break;
		if (*ent->d_name != '.')
			if (!func(ent->d_name, -2, parm))
			{
				closedir(dir);
				return false;
			}
	} while(1);
	closedir(dir);

	return true;
}
#endif

void Sys_DebugLog(char *file, char *fmt, ...)
{
	va_list argptr;
	char data[1024];
	int fd;
	
	va_start(argptr, fmt);
	_vsnprintf (data,sizeof(data)-1, fmt, argptr);
	va_end(argptr);

	if (strlen(data) >= sizeof(data)-1)
		Sys_Error("Sys_DebugLog was stomped\n");

	fd = open(file, O_WRONLY | O_CREAT | O_APPEND, 0666);
	write(fd, data, strlen(data));
	close(fd);
}
/*
================
Sys_DoubleTime
================
*/
double Sys_DoubleTime (void)
{
	struct timeval tp;
	struct timezone tzp;
	static int		secbase;

	gettimeofday(&tp, &tzp);
	
	if (!secbase)
	{
		secbase = tp.tv_sec;
		return tp.tv_usec/1000000.0;
	}
	
	return (tp.tv_sec - secbase) + tp.tv_usec/1000000.0;
}

/*
================
Sys_Error
================
*/
void Sys_Error (const char *error, ...)
{
	va_list		argptr;
	char		string[1024];
	
	va_start (argptr,error);
	_vsnprintf (string,sizeof(string)-1, error,argptr);
	va_end (argptr);
	printf ("Fatal error: %s\n",string);
	
*(int*)-3 = 0;
	exit (1);
}

/*
================
Sys_Printf
================
*/
void Sys_Printf (char *fmt, ...)
{
	va_list		argptr;
	static char		text[2048];
	unsigned char		*p;

	va_start (argptr,fmt);
	_vsnprintf (text,sizeof(text)-1, fmt,argptr);
	va_end (argptr);

	if (strlen(text) > sizeof(text))
		Sys_Error("memory overwrite in Sys_Printf");

    if (sys_nostdout.value)
        return;

	for (p = (unsigned char *)text; *p; p++) {
		*p &= 0x7f;
		if ((*p > 128 || *p < 32) && *p != 10 && *p != 13 && *p != 9)
			printf("[%02x]", *p);
		else
			putc(*p, stdout);
	}
	fflush(stdout);
}


/*
================
Sys_Quit
================
*/
void Sys_Quit (void)
{
	exit (0);		// appkit isn't running
}

static int do_stdin = 1;

/*
================
Sys_ConsoleInput

Checks for a complete line of text typed in at the console, then forwards
it to the host command processor
================
*/
char *Sys_ConsoleInput (void)
{
	static char	text[256];
	int		len;

	if (!stdin_ready || !do_stdin)
		return NULL;		// the select didn't say it was ready
	stdin_ready = false;

	len = read (0, text, sizeof(text));
	if (len == 0) {
		// end of file
		do_stdin = 0;
		return NULL;
	}
	if (len < 1)
		return NULL;
	text[len-1] = 0;	// rip off the /n and terminate
	
	return text;
}

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

Quake calls this so the system can register variables before host_hunklevel
is marked
=============
*/
void Sys_Init (void)
{
	Cvar_Register (&sys_nostdout, "System configuration");
	Cvar_Register (&sys_extrasleep,	"System configuration");
	Cvar_Register (&sys_maxtic, "System configuration");
}

/*
=============
main
=============
*/
int main(int argc, char *argv[])
{
	double			time, oldtime, newtime;
	quakeparms_t	parms;
//	fd_set	fdset;
//	extern	int		net_socket;
	int j;

	memset (&parms, 0, sizeof(parms));

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

	parms.memsize = 16*1024*1024;

	j = COM_CheckParm("-mem");
	if (j)
		parms.memsize = (int) (Q_atof(com_argv[j+1]) * 1024 * 1024);
	if ((parms.membase = malloc (parms.memsize)) == NULL)
		Sys_Error("Can't allocate %ld\n", parms.memsize);

	parms.basedir = ".";

/*
	if (Sys_FileTime ("id1/pak0.pak") != -1)
	else
		parms.basedir = "/raid/quake/v2";
*/

	SV_Init (&parms);

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

//
// main loop
//
	oldtime = Sys_DoubleTime () - 0.1;
	while (1)
	{
		if (do_stdin)
			stdin_ready = NET_Sleep(sys_maxtic.value, true);
		else
		{	
			NET_Sleep(sys_maxtic.value, false);
			stdin_ready = false;
		}

	// find time passed since last cycle
		newtime = Sys_DoubleTime ();
		time = newtime - oldtime;
		oldtime = newtime;
		
		SV_Frame (time);		
		
	// extrasleep is just a way to generate a fucked up connection on purpose
		if (sys_extrasleep.value)
			usleep (sys_extrasleep.value);
	}	
	return 0;
}






int Sys_EnumerateFiles (char *gpath, char *match, int (*func)(char *, int, void *), void *parm)
{
#include <dirent.h>
	DIR *dir, *dir2;
	char apath[MAX_OSPATH];
	char file[MAX_OSPATH];
	char truepath[MAX_OSPATH];
	char *s;
	struct dirent *ent;

//printf("path = %s\n", gpath);
//printf("match = %s\n", match);

	if (!gpath)
		gpath = "";
	*apath = '\0';

	Q_strncpyz(apath, match, sizeof(apath));
	for (s = apath+strlen(apath)-1; s >= apath; s--)
	{
		if (*s == '/')
		{
			s[1] = '\0';
			match += s - apath+1;
			break;
		}
	}
	if (s < apath)	//didn't find a '/'
		*apath = '\0';

	sprintf(truepath, "%s/%s", gpath, apath);


//printf("truepath = %s\n", truepath);
//printf("gamepath = %s\n", gpath);
//printf("apppath = %s\n", apath);
//printf("match = %s\n", match);
	dir = opendir(truepath);
	if (!dir)
	{
		Con_Printf("Failed to open dir");
		return true;
	}
	do
	{
		ent = readdir(dir);
		if (!ent)
			break;
		if (*ent->d_name != '.')
			if (wildcmp(match, ent->d_name))
			{
				snprintf(file, sizeof(file)-1, "%s/%s", gpath, ent->d_name);
//would use stat, but it breaks on fat32.

				if ((dir2 = opendir(file)))
				{
					closedir(dir2);
					snprintf(file, sizeof(file)-1, "%s%s/", apath, ent->d_name);
//printf("is directory = %s\n", file);
				}
				else
				{
					snprintf(file, sizeof(file)-1, "%s%s", apath, ent->d_name);
//printf("file = %s\n", file);
				}

				if (!func(file, -2, parm))
				{
					closedir(dir);
					return false;
				}
			}
	} while(1);
	closedir(dir);

	return true;
}

void Sys_UnloadGame (void)
{
}
void *Sys_GetGameAPI (void *parms)
{
	return NULL;
}

void Sys_ServerActivity(void)
{
}

