#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <process.h>
#include <dos.h>
#include <conio.h>
#include "doomnet.h"

doomcom_t	doomcom;
int			vectorishooked;
void interrupt (*olddoomvect) (void);

extern int loadgame;
extern char config [256+1];
extern char devparm [256+1];
extern int nomonsters;
extern int respawn;
extern int episode;
extern int map;
extern int skill;
extern int deathmatch;



/*
=================
=
= CheckParm
=
= Checks for the given parameter in the program's command line arguments
=
= Returns the argument number (1 to argc-1) or 0 if not present
=
=================
*/

#if 0  /****************************************/

int CheckParm (char *check)
{
	int             i;

	for (i = 1;i<_argc;i++)
		if ( !stricmp(check,_argv[i]) )
			return i;

	return 0;
}

#endif  /****************************************/


/*
=============
=
= LaunchDOOM
=
These fields in doomcom should be filled in before calling:

	short	numnodes;		// console is allways node 0
	short	ticdup;			// 1 = no duplication, 2-5 = dup for slow nets
	short	extratics;		// 1 = send a backup tic in every packet

	short	consoleplayer;	// 0-3 = player number
	short	numplayers;		// 1-4
	short	angleoffset;	// 1 = left, 0 = center, -1 = right
	short	drone;			// 1 = drone
=============
*/

void LaunchDOOM (void)
{
	char	*newargs[99];
	char	adrstring[10];
	long  	flatadr;
	char epstr [2];
	char mapstr [2];
	char skstr [2];
	char lostr [2];
	int argnum = 0;
	int i;
	int prev;
	char devstr [256+1];

// prepare for DOOM
	olddoomvect = getvect (doomcom.intnum);
	setvect (doomcom.intnum,NetISR);
	vectorishooked = 1;

// build the argument list for DOOM, adding "-net" and the address of doomcom.

	/* Copy our program name first - isn't necessary, but doom relies on it */
	newargs [argnum++] = _argv [0];

	if (deathmatch)
		newargs [argnum++] = "-deathmatch";
	if (nomonsters)
		newargs [argnum++] = "-nomonsters";
	if (respawn)
		newargs [argnum++] = "-respawn";
	if (map != -1)
	{
		if (devparm [0] == EOS)
			newargs [argnum++] = "-devparm";
		newargs [argnum++] = "-warp";
		sprintf (epstr, "%d", episode == -1 ? 1 : episode);
		newargs [argnum++] = epstr;
		sprintf (mapstr, "%d", map);
		newargs [argnum++] = mapstr;
	}
	else if (episode != -1)
	{
		newargs [argnum++] = "-episode";
		sprintf (epstr, "%d", episode);
		newargs [argnum++] = epstr;
	}
	if (skill != -1)
	{
		newargs [argnum++] = "-skill";
		sprintf (skstr, "%d", skill);
		newargs [argnum++] = skstr;
	}
	if (loadgame != -1)
	{
		newargs [argnum++] = "-loadgame";
		sprintf (lostr, "%d", loadgame);
		newargs [argnum++] = lostr;
	}
	if (config [0] != EOS)
	{
		newargs [argnum++] = "-config";
		newargs [argnum++] = config;
	}

	if (devparm [0] != EOS)
	{
		newargs [argnum++] = "-devparm";
		/* Copy all devparm args */
		strcpy (devstr, devparm);
		prev = 0;
		i = -1;
		while (devstr [++i] != EOS)
		{
			if (devstr [i] == ' ')
			{
				devstr [i] = EOS;
				newargs [argnum++] = &devstr [prev];
				prev = i+1;
			}
		}
		newargs [argnum++] = &devstr [prev];
	}

	newargs [argnum++] = "-net";

	/* Add address of doomcom structure */
	flatadr = (long)_DS*16 + (unsigned)&doomcom;
	sprintf (adrstring,"%lu",flatadr);
	newargs [argnum++] = adrstring;

	newargs [argnum] = NULL;

	printf ("About to launch doom.exe -- Passing these arguments:\n");
	for (i = 0; i < argnum; i++)
		printf ("  arg %d = %s\n", i, newargs [i]);
	printf ("  player = %d\n", doomcom.consoleplayer);
	printf ("  extratics = %d\n", doomcom.extratics);
	printf ("\nPress ESC to abort, or any other key to continue...");
	if (getch () == ESC)
	{
		printf ("\n\n");
		return;
   }

	spawnv  (P_WAIT, "doom", newargs);
	printf ("\nReturned from DOOM\n\n");
}