/*
	sv_pr_qwe.c

	qwe extentions needed by the KTPro mod

	Copyright (C) 2003 Bill Currie

	Author: Bill Currie <bill@taniwha.org>
	Date: 2003/11/17

	taken from qwe (actual author currently unkown, probably
	`highlander') and ported to qf

	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

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

static __attribute__ ((unused))
const char  rcsid[] = "$Id$";

#ifdef HAVE_STRING_H
# include <string.h>
#endif
#ifdef HAVE_STRINGS_H
# include <strings.h>
#endif

#include "QF/cbuf.h"
#include "QF/cmd.h"
#include "QF/dstring.h"
#include "QF/idparse.h"
#include "QF/progs.h"
#include "QF/quakefs.h"
#include "QF/sys.h"
#include "QF/va.h"

#include "sv_demo.h"
#include "sv_pr_qwe.h"
#include "sv_progs.h"

typedef struct {
	func_t      timeofday;
	func_t      ConsoleCmd;
	func_t      UserCmd;
} qwe_funcs_t;

static qwe_funcs_t qwe_funcs;

static void
PF_executecmd (progs_t * pr)
{
	int         old_other, old_self;	// mod_consolecmd will be executed, so
										// we need to store these

	old_self = *sv_globals.self;
	old_other = *sv_globals.other;

	Cbuf_Execute (sv_cbuf);

	*sv_globals.self = old_self;
	*sv_globals.other = old_other;
}

/*
	PF_tokanize

	tokanize string

	void tokanize(string)
*/

static void
PF_tokanize (progs_t * pr)
{
	const char *str;

	str = P_GSTRING (pr, 0);
	COM_TokenizeString (str, sv_args);
	cmd_args = sv_args;
}

/*
	PF_argc

	returns number of tokens (must be executed after PF_Tokanize!)

	float argc(void)
*/

static void
PF_argc (progs_t * pr)
{
	R_FLOAT (pr) = (float) Cmd_Argc ();
}

/*
	PF_argv

	returns token requested by user (must be executed after PF_Tokanize!)

	string argc(float)
*/

static void
PF_argv (progs_t * pr)
{
	int         num;

	num = (int) P_FLOAT (pr, 0);

	if (num < 0)
		num = 0;
	if (num > Cmd_Argc () - 1)
		num = Cmd_Argc () - 1;

	RETURN_STRING (pr, Cmd_Argv (num));
}

/*
	PF_teamfield

	string teamfield(.string field)
*/

static void
PF_teamfield (progs_t * pr)
{
	sv_fields.team_str = P_INT (pr, 0);
}

/*
	PF_substr

	string substr(string str, float start, float len)
*/

static void
PF_substr (progs_t * pr)
{
	const char *s;
	char       *tmp;
	int         start, len, l;

	s = P_GSTRING (pr, 0);
	start = (int) P_FLOAT (pr, 1);
	len = (int) P_FLOAT (pr, 2);
	l = strlen (s);

	if (start >= l || !len || !*s) {
		R_STRING (pr) = 0;
		return;
	}

	s += start;
	l -= start;

	if (len > l + 1)
		len = l + 1;

	tmp = Hunk_TempAlloc (len);
	strncpy (tmp, s, len - 1);
	tmp[len] = 0;

	RETURN_STRING (pr, tmp);
}

/*
	PF_strcat

	string strcat(string str1, string str2)
*/

static void
PF_strcat (progs_t * pr)
{
	RETURN_STRING (pr, PF_VarString (pr, 0));
}

/*
	PF_strlen

	float strlen(string str)
*/

static void
PF_strlen (progs_t * pr)
{
	R_FLOAT (pr) = (float) strlen (P_GSTRING (pr, 0));
}

/*
	PF_str2byte

	float str2byte (string str)
*/

static void
PF_str2byte (progs_t * pr)
{
	R_FLOAT (pr) = (float) *P_GSTRING (pr, 0);
}

/*
	PF_str2short

	float str2short (string str)
*/

static void
PF_str2short (progs_t * pr)
{
	const unsigned char *str = P_GSTRING (pr, 0);

	R_FLOAT (pr) = (short) ((str[1] << 8) | str[0]);
}


/*
	PF_newstr

	string newstr (string str [, float size])

	ignores size (there for compatability with qwe)
*/
static void
PF_newstr (progs_t * pr)
{
	const char *s;
	dstring_t  *dstr;
	int         i;

	s = P_GSTRING (pr, 0);

	i = PR_NewString (pr);
	dstr = PR_GetDString (pr, i);

	dstring_copystr (dstr, s);

	R_STRING (pr) = i;
}

/*
	PF_frestr

	void freestr (string str)
*/

static void
PF_freestr (progs_t * pr)
{
	PR_FreeString (pr, P_STRING (pr, 0));
}

/*
	PF_readcmd

	string readmcmd (string str)
*/

static void
PF_readcmd (progs_t *pr)
{
	const char *s;
	redirect_t  old;

	s = P_GSTRING (pr, 0);

	Cbuf_Execute (sv_cbuf);
	Cbuf_AddText (sv_cbuf, s);

	old = sv_redirected;
	if (old != RD_NONE)
		SV_EndRedirect ();

	SV_BeginRedirect (RD_MOD);
	Cbuf_Execute (sv_cbuf);
	RETURN_STRING (pr, outputbuf.str);
	SV_EndRedirect ();

	if (old != RD_NONE)
		SV_BeginRedirect (old);
}

/*
	PF_redirectcmd

	void redirectcmd (entity to, string str)
*/

static void
PF_redirectcmd (progs_t *pr)
{
	const char *s;
	int         entnum;
	extern redirect_t sv_redirected;

	if (sv_redirected)
		return;

	entnum = P_EDICTNUM (pr, 0);
	if (entnum < 1 || entnum > MAX_CLIENTS)
		PR_RunError (pr, "Parm 0 not a client");

	s = P_GSTRING (pr, 1);

	Cbuf_AddText (sv_cbuf, s);

	SV_BeginRedirect (RD_MOD + entnum);
	Cbuf_Execute (sv_cbuf);
	SV_EndRedirect ();
}

static void
PF_calltimeofday (progs_t * pr)
{
	date_t      date;
	dfunction_t *f;

	if ((f = ED_FindFunction (pr, "timeofday")) != NULL) {

		Sys_TimeOfDay (&date);

		PR_PushFrame (&sv_pr_state);
		P_FLOAT (pr, 0) = (float) date.sec;
		P_FLOAT (pr, 1) = (float) date.min;
		P_FLOAT (pr, 2) = (float) date.hour;
		P_FLOAT (pr, 3) = (float) date.day;
		P_FLOAT (pr, 4) = (float) date.mon;
		P_FLOAT (pr, 5) = (float) date.year;
		P_STRING (pr, 6) = PR_SetTempString (pr, date.str);

		PR_ExecuteProgram (pr, (func_t) (f - sv_pr_state.pr_functions));
		PR_PopFrame (&sv_pr_state);
	}
}

/*
	PF_forcedemoframe

	void PF_forcedemoframe(float now)
	Forces demo frame
	if argument 'now' is set, frame is written instantly
*/

static void
PF_forcedemoframe (progs_t * pr)
{
	demo.forceFrame = 1;
	if (P_FLOAT (pr, 0) == 1)
		SV_SendDemoMessage ();
}


/*
	PF_strcpy

	void strcpy(string dst, string src)
*/

static void
PF_strcpy (progs_t * pr)
{
	dstring_copystr (P_DSTRING (pr, 0), P_GSTRING (pr, 1));
}

/*
	PF_strncpy

	void strcpy(string dst, string src, float count)
*/

static void
PF_strncpy (progs_t * pr)
{
	dstring_t  *dst = P_DSTRING (pr, 0);
	const char *src = P_GSTRING (pr, 1);
	size_t      count = P_FLOAT (pr, 2);

	dst->size = count;
	dstring_adjust (dst);
	strncpy (dst->str, src, count);
}


/*
	PF_strstr

	string strstr(string str, string sub)
*/

static void
PF_strstr (progs_t * pr)
{
	const char *str, *sub, *p;

	str = P_GSTRING (pr, 0);
	sub = P_GSTRING (pr, 1);

	if ((p = strstr (str, sub)) == NULL) {
		R_STRING (pr) = 0;
		return;
	}

	R_STRING (pr) = p - pr->pr_strings;
}

static inline void
clean_text (unsigned char *text)
{
	while (*text) {
		*text = sys_char_map[*text];
		text++;
	}
}

/*
	PF_log

	void log(string name, float console, string text)
*/

static void
PF_log (progs_t * pr)
{
	const char *name;
	char       *text;
	QFile      *file;

	name = va ("%s/%s.log", qfs_gamedir->dir.def, P_GSTRING (pr, 0));
	file = QFS_Open (name, "a");

	text = PF_VarString (pr, 2);
	clean_text (text);

	if (P_FLOAT (pr, 1))
		Sys_Printf ("%s", text);

	if (!file) {
		Sys_Printf ("coldn't open log file %s\n", name);
	} else {
		Qputs (file, text);
		Qflush (file);
		Qclose (file);
	}
}

/*
	PF_conprint
*/
static void
PF_conprint (progs_t * pr)
{
	Con_Printf ("%s", PF_VarString (pr, 0));
}

#define QWE (PR_RANGE_QWE << PR_RANGE_SHIFT) |

static builtin_t builtins[] = {
	{"QWE:executecmd",			PF_executecmd,		QWE 83},
	{"QWE:tokanize" /* sic */,	PF_tokanize,		QWE 84},
	{"QWE:argc",				PF_argc,			QWE 85},
	{"QWE:argv",				PF_argv,			QWE 86},
	{"QWE:teamfield",			PF_teamfield,		QWE 87},
	{"QWE:substr",				PF_substr,			QWE 88},
	{"QWE:strcat",				PF_strcat,			QWE 89},
	{"QWE:strlen",				PF_strlen,			QWE 90},
	{"QWE:str2byte",			PF_str2byte,		QWE 91},
	{"QWE:str2short",			PF_str2short,		QWE 92},
	{"QWE:newstr",				PF_newstr,			QWE 93},
	{"QWE:freestr",				PF_freestr,			QWE 94},
	{"QWE:conprint",			PF_conprint,		QWE 95},
	{"QWE:readcmd",				PF_readcmd,			QWE 96},
	{"QWE:strcpy",				PF_strcpy,			QWE 97},
	{"QWE:strstr",				PF_strstr,			QWE 98},
	{"QWE:strncpy",				PF_strncpy,			QWE 99},
	{"QWE:log",					PF_log,				QWE 100},
	{"QWE:redirectcmd",			PF_redirectcmd,		QWE 101},
	{"QWE:calltimeofday",		PF_calltimeofday,	QWE 102},
	{"QWE:forceddemoframe",		PF_forcedemoframe,	QWE 103},
	{0}
};

static struct {
	const char *name;
	int        *field;
} qwe_func_list[] = {
	{"timeofday",			&qwe_funcs.timeofday},
	{"ConsoleCmd",			&qwe_funcs.ConsoleCmd},
	{"UserCmd",				&qwe_funcs.UserCmd},
	{"localinfoChanged",	&sv_funcs.LocalinfoChanged},
	{"UserInfo_Changed",	&sv_funcs.UserInfoChanged},
	{"ChatMessage",			&sv_funcs.ChatMessage},
};

static int
qwe_console_cmd (void)
{
	if (qwe_funcs.ConsoleCmd) {
		if (sv_redirected != RD_MOD) {
			*sv_globals.time = sv.time;
			*sv_globals.self = 0;
		}
		PR_ExecuteProgram (&sv_pr_state, qwe_funcs.ConsoleCmd);
		return (int) R_FLOAT (&sv_pr_state);
	}

	return false;
}

static int
qwe_user_cmd (void)
{
	if (qwe_funcs.UserCmd) {
		if (sv_redirected != RD_MOD) {
			*sv_globals.time = sv.time;
			*sv_globals.self = EDICT_TO_PROG(&sv_pr_state, sv_player);
		}
		PR_ExecuteProgram (&sv_pr_state, qwe_funcs.UserCmd);
		return (int) R_FLOAT (&sv_pr_state);
	}

	return false;
}

static int
qwe_load (progs_t * pr)
{
	size_t      i;

	for (i = 0; i < sizeof (qwe_func_list) / sizeof (qwe_func_list[0]); i++) {
		dfunction_t *f = ED_FindFunction (pr, qwe_func_list[i].name);

		*qwe_func_list[i].field = 0;
		if (f)
			*qwe_func_list[i].field = (func_t) (f - pr->pr_functions);
	}

	sv_cbuf->unknown_command = qwe_console_cmd;
	ucmd_unknown = qwe_user_cmd;
	return 1;
}

void
SV_PR_QWE_Init (progs_t *pr)
{
	PR_RegisterBuiltins (pr, builtins);
	PR_AddLoadFunc (pr, qwe_load);
}