/* ************************************************************************
*  file: modify.c                                         Part of DIKUMUD *
*  Usage: Run-time modification (by users) of game variables              *
*  Copyright (C) 1990, 1991 - see 'license.doc' for complete information. *
************************************************************************ */


#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <string.h>
#include <time.h>

#include "structs.h"
#include "utility.h"
#include "interpreter.h"
#include "handler.h"
#include "db.h"
#include "comm.h"

#include "modify.h"

#define REBOOT_AT    10  /* 0-23, time of optional reboot if -e lib/reboot */

#define TP_MOB    0
#define TP_OBJ	   1
#define TP_ERROR  2


void show_string(struct descriptor_data *d, char *input);


const char *string_fields[] =
{
	"name",
	"short",
	"long",
	"description",
	"title",
	"delete-description",
	"\n"
};




/* maximum length for text field x+1 */
const int length[] =
{
	15,
	60,
	256,
	4096,
	60
};




const char *skill_fields[] = 
{
	"learned",
	"affected",
	"duration",
	"recognize",
	"\n"
};




int max_value[] =
{
	255,
	255,
	10000,
	1
};

/* ************************************************************************
*  modification of malloc'ed strings                                      *
************************************************************************ */

/* Add user input to the 'current' string (as defined by d->str) */
void string_add(struct descriptor_data *d, char *str)
{
	char *scan;
	int terminator = 0;

	/* determine if this is the terminal string, and truncate if so */
	for ((scan = str); *scan; scan++)
	   if ( (terminator = (*scan == '@')) )
	   {
			*scan = '\0';
			break;
	   }
	
	if (!(*d->str))
	{
		if (strlen(str) > d->max_str)
		{
			send_to_char("String too long - Truncated.\n\r",
			   d->character);
			*(str + d->max_str) = '\0';
			terminator = 1;
		}
		CREATE(*d->str, char, strlen(str) + 3);
		strcpy(*d->str, str);
	}
	else
	{
		if (strlen(str) + strlen(*d->str) > d->max_str)
		{
			send_to_char("String too long. Last line skipped.\n\r",
			   d->character);
			terminator = 1;
		}
		else 
		{
			if (!(*d->str = (char *) realloc(*d->str, strlen(*d->str) + 
		   	strlen(str) + 3)))
			{
				perror("string_add");
				exit(1);
			}
			strcat(*d->str, str);
		}
	}

	if (terminator)
	{
		d->str = 0;
		if (d->connected == CON_EXDSCR)
		{
			SEND_TO_Q(MENU, d);
			d->connected = CON_SLCT;
		}
	}
	else
	   strcat(*d->str, "\n\r");
}


#undef MAX_STR

/* interpret an argument for do_string */
void quad_arg(char *arg, int *type, char *name, int *field, char *string)
{
	char buf[MAX_STRING_LENGTH];

	/* determine type */
	arg = one_argument(arg, buf);
	if (is_abbrev(buf, "char"))
	   *type = TP_MOB;
	else if (is_abbrev(buf, "obj"))
	   *type = TP_OBJ;
	else
	{
		*type = TP_ERROR;
		return;
	}

	/* find name */
	arg = one_argument(arg, name);

	/* field name and number */
	arg = one_argument(arg, buf);
	if (!(*field = old_search_block(buf, 0, strlen(buf), string_fields, 0)))
	   return;

	/* string */
	for (; isspace(*arg); arg++);
	for (; (*string = *arg); arg++, string++);

	return;
}
	
	 


/* modification of malloc'ed strings in chars/objects */
void do_string(struct char_data *ch, char *arg, int cmd)
{
	char name[MAX_STRING_LENGTH], string[MAX_STRING_LENGTH];
	int field, type;
	struct char_data *mob;
	struct obj_data *obj;
	struct extra_descr_data *ed, *tmp;

	if (IS_NPC(ch))
	   return;

	quad_arg(arg, &type, name, &field, string);

	if (type == TP_ERROR)
	{
		send_to_char(
		 "Syntax:\n\rstring ('obj'|'char') <name> <field> [<string>].",
		 ch);
		return;
	}

	if (!field)
	{
		send_to_char("No field by that name. Try 'help string'.\n\r",
		   ch);
		return;
	}

	if (type == TP_MOB)
	{
		/* locate the beast */
		if (!(mob = get_char_vis(ch, name)))
		{
			send_to_char("I don't know anyone by that name...\n\r",
			   ch);
			return;
		}

		switch(field)
		{
			case 1:
				if (!IS_NPC(mob) && GET_LEVEL(ch) < 24)
				{
					send_to_char("You can't change that field for players.", ch);
					return;
				}
				ch->desc->str = &GET_NAME(mob);
				if (!IS_NPC(mob))
					send_to_char(
						"WARNING: You have changed the name of a player.\n\r", ch);
			break;
			case 2:
			   if (!IS_NPC(mob))
			   {
					send_to_char(
				   "That field is for monsters only.\n\r", ch);
			   	return;
			   }
			   ch->desc->str = &mob->player.short_descr;
			break;
			case 3:
			   if (!IS_NPC(mob))
			   {
				send_to_char(
				   "That field is for monsters only.\n\r", ch);
			   	return;
			   }
			   ch->desc->str = &mob->player.long_descr;
			break;
			case 4:ch->desc->str = &mob->player.description; break;
			case 5:
			   if (IS_NPC(mob))
			   {
				send_to_char("Monsters have no titles.\n\r",
				   ch);
				return;
			   }
			   ch->desc->str = &mob->player.title;
			break;
			default:
			   send_to_char(
			      "That field is undefined for monsters.\n\r", ch);
			   return;
			break;
		}
	}
	else    /* type == TP_OBJ */
	{
		/* locate the object */
		if (!(obj = get_obj_vis(ch, name)))
		{
			send_to_char("Can't find such a thing here..\n\r", ch);
			return;
		}

		switch(field)
		{
			case 1: ch->desc->str = &obj->name; break;
			case 2: ch->desc->str = &obj->short_description; break;
			case 3: ch->desc->str = &obj->description; break;
			case 4:
				if (!*string)
				{
					send_to_char("You have to supply a keyword.\n\r", ch);
					return;
				}
				/* try to locate extra description */
				for (ed = obj->ex_description; ; ed = ed->next)
					if (!ed) /* the field was not found. create a new one. */
					{
						CREATE(ed , struct extra_descr_data, 1);
						ed->next = obj->ex_description;
						obj->ex_description = ed;
						CREATE(ed->keyword, char, strlen(string) + 1);
						strcpy(ed->keyword, string);
						ed->description = 0;
						ch->desc->str = &ed->description;
						send_to_char("New field.\n\r", ch);
						break;
					}
					else if (!str_cmp(ed->keyword, string)) /* the field exists */
					{
						free(ed->description);
						ed->description = 0;
						ch->desc->str = &ed->description;
						send_to_char(
							"Modifying description.\n\r", ch);
						break;
					}
				ch->desc->max_str = MAX_STRING_LENGTH;
				return; /* the stndrd (see below) procedure does not apply here */
			break;
			case 6: 
				if (!*string)
				{
					send_to_char("You must supply a field name.\n\r", ch);
					return;
				}
				/* try to locate field */
				for (ed = obj->ex_description; ; ed = ed->next)
					if (!ed)
					{
						send_to_char("No field with that keyword.\n\r", ch);
						return;
					}
					else if (!str_cmp(ed->keyword, string))
					{
						free(ed->keyword);
						if (ed->description)
							free(ed->description);
						
						/* delete the entry in the desr list */						
						if (ed == obj->ex_description)
							obj->ex_description = ed->next;
						else
						{
							for(tmp = obj->ex_description; tmp->next != ed; 
								tmp = tmp->next);
							tmp->next = ed->next;
						}
						free(ed);

						send_to_char("Field deleted.\n\r", ch);
						return;
					}
			break;				
			default:
			   send_to_char(
			      "That field is undefined for objects.\n\r", ch);
			   return;
			break;
		}
	}

	if (*ch->desc->str)
	{
		free(*ch->desc->str);
	}

	if (*string)   /* there was a string in the argument array */
	{
		if (strlen(string) > length[field - 1])
		{
			send_to_char("String too long - truncated.\n\r", ch);
			*(string + length[field - 1]) = '\0';
		}
		CREATE(*ch->desc->str, char, strlen(string) + 1);
		strcpy(*ch->desc->str, string);
		ch->desc->str = 0;
		send_to_char("Ok.\n\r", ch);
	}
	else          /* there was no string. enter string mode */
	{
		send_to_char("Enter string. terminate with '@'.\n\r", ch);
		*ch->desc->str = 0;
		ch->desc->max_str = length[field - 1];
	}
}
			
			





/* **********************************************************************
*  Modification of character skills                                     *
********************************************************************** */


void do_setskill(struct char_data *ch, char *arg, int cmd)
{
	struct char_data *vict;
	char name[100], num[100], buf[100], help[MAX_STRING_LENGTH];
	int skill, field, value, i;
	const char *skills[] = 
	{
		"search", "frighten", "telepath", "detect-evil",
		"sense-life", "cure", "bless", "remove",
		"poison", "blind", "neutralize", "purify",
		"hide", "cover", "backstab", "detect-invisible",
		"detect-magic", "enchant", "teleport", "create",
		"sanctuary", "resist", "drain", "turn",
		"protect", "light", "charm", "floating",
		"lightning-bolt", "sleep", "wake", "paralysis",
		"recharge", "shield", "fireball", "knock",
		"ventricolism", "double", "invisible", "death-ray",
		"bash", "dodge", "kick", "uppercut",
		"defend", "dirk", "listen", "missile", "detect", "\n"
	};

	send_to_char("This routine is disabled untill it fitts\n\r", ch);
	send_to_char("The new structures (sorry Quinn) ....Bombman\n\r", ch);
	return;

	arg = one_argument(arg, name);
	if (!*name) /* no arguments. print an informative text */
	{
		send_to_char("Syntax:\n\rsetskill <name> <skill> <field> <value>\n\r",
		   ch);
		strcpy(help, "Skill being one of the following:\n\r\n\r");
		for (i = 1; *skills[i] != '\n'; i++)
		{
			sprintf(help + strlen(help), "%18s", skills[i]);
			if (!(i % 4))
			{
				strcat(help, "\n\r");
				send_to_char(help, ch);
				*help = '\0';
			}
		}
		if (*help)
			send_to_char(help, ch);
		return;
	}
	if (!(vict = get_char_vis(ch, name)))
	{
		send_to_char("No living thing by that name.\n\r", ch);
		return;
	}
	arg = one_argument(arg, buf);
	if (!*buf)
	{
		send_to_char("Skill name expected.\n\r", ch);
		return;
	}
	if ((skill = old_search_block(buf, 0, strlen(buf), skills, 1)) < 0)
	{
		send_to_char("No such skill is known. Try 'setskill' for list.\n\r", ch);
		return;
	}
	argument_interpreter(arg, buf, num);
	if (!*num || !*buf)
	{
		send_to_char("Field name or value undefined.\n\r", ch);
		return;
	}
	if ((field = old_search_block(buf, 0, strlen(buf), skill_fields, 0)) < 0)
	{
		send_to_char("Unrecognized field.\n\r", ch);
		return;
	}
	value = atoi(num);
	if (field == 3)
	{
		if (value < -1)
		{
			send_to_char("Minimum value for that is -1.\n\r", ch);
			return;
		}
	}
	else
		if (value < 0)
		{
			send_to_char("Minimum value for that is 0.\n\r", ch);
			return;
		}
	if (value > max_value[field - 1])
	{
		sprintf(buf, "Max value for that is %d.\n\r", max_value[field - 1]);
		send_to_char(buf, ch);
		return;
	}

	switch (field)
	{
		case 1: vict->skills[skill].learned = value; break;
		/* case 2: vict->skills[skill].affected_by = value; break; */
		/* case 3: vict->skills[skill].duration = value; break;    */
		case 4: vict->skills[skill].recognise = value; break;
	}

	send_to_char("Ok.\n\r", ch);
}








/* db stuff *********************************************** */


/* One_Word is like one_argument, execpt that words in quotes "" are */
/* regarded as ONE word                                              */

char *one_word(char *argument, char *first_arg )
{
	int found, begin, look_at;

	found = begin = 0;

	do
	{
		for ( ;isspace(*(argument + begin)); begin++);

		if (*(argument+begin) == '\"') {  /* is it a quote */

			begin++;

			for (look_at=0; (*(argument+begin+look_at) >= ' ') && 
			    (*(argument+begin+look_at) != '\"') ; look_at++)
				*(first_arg + look_at) = LOWER(*(argument + begin + look_at));

			if (*(argument+begin+look_at) == '\"')
				begin++;

		} else {

			for (look_at=0; *(argument+begin+look_at) > ' ' ; look_at++)
				*(first_arg + look_at) = LOWER(*(argument + begin + look_at));

		}

		*(first_arg + look_at) = '\0';
		begin += look_at;
	}
	while (fill_word(first_arg));

	return(argument+begin);
}


struct help_index_element *build_help_index(FILE *fl, int *num)
{
	int nr = -1, issorted, i;
	struct help_index_element *list = 0, mem;
	char buf[81], tmp[81], *scan;
	long pos;

	for (;;)
	{
		pos = ftell(fl);
		fgets(buf, 81, fl);
		*(buf + strlen(buf) - 1) = '\0';
		scan = buf;
		for (;;)
		{
			/* extract the keywords */
			scan = one_word(scan, tmp);

			if (!*tmp)
				break;

			if (!list)
			{
				CREATE(list, struct help_index_element, 1);
				nr = 0;
			}
			else
				RECREATE(list, struct help_index_element, ++nr + 1);

			list[nr].pos = pos;
			CREATE(list[nr].keyword, char, strlen(tmp) + 1);
			strcpy(list[nr].keyword, tmp);
		}
		/* skip the text */
		do
			fgets(buf, 81, fl);
		while (*buf != '#');
		if (*(buf + 1) == '~')
			break;
	}
	/* we might as well sort the stuff */
	do
	{
		issorted = 1;
		for (i = 0; i < nr; i++)
			if (str_cmp(list[i].keyword, list[i + 1].keyword) > 0)
			{
				mem = list[i];
				list[i] = list[i + 1];
				list[i + 1] = mem;
				issorted = 0;
			}
	}
	while (!issorted);

	*num = nr;
	return(list);
}



void page_string(struct descriptor_data *d, char *str, int keep_internal)
{
  if (!d)
    return;

  if (keep_internal) {
    CREATE(d->showstr_head, char, strlen(str) + 1);
    strcpy(d->showstr_head, str);
    d->showstr_point = d->showstr_head;
  } else
    d->showstr_point = str;

  show_string(d, "");
}

void show_string(struct descriptor_data *d, char *input)
{
  char buffer[MAX_STRING_LENGTH], buf[MAX_INPUT_LENGTH];
  register char *scan, *chk;
  int lines = 0, toggle = 1;

  one_argument(input, buf);

  if (*buf) {
    if (d->showstr_head) {
      free(d->showstr_head);
      d->showstr_head = 0;
    }
    d->showstr_point = 0;
    return;
  }

  /* show a chunk */
  for (scan = buffer;; scan++, d->showstr_point++)
    if((((*scan = *d->showstr_point) == '\n') || (*scan == '\r')) &&
       ((toggle = -toggle) < 0))
      lines++;
    else if (!*scan || (lines >= 22)) {
      *scan = '\0';
      SEND_TO_Q(buffer, d);

      /* see if this is the end (or near the end) of the string */
      for (chk = d->showstr_point; isspace(*chk); chk++);
      if (!*chk) {
	if (d->showstr_head) {
	  free(d->showstr_head);
	  d->showstr_head = 0;
	}
	d->showstr_point = 0;
      }
      return;
    }
}

void check_reboot(void)
{
  long tc;
  struct tm *t_info;
  char dummy;
  FILE *boot;

  extern int terminate, game_reboot;

  tc = time(0);
  t_info = localtime(&tc);

  if ((t_info->tm_hour + 1) == REBOOT_AT && t_info->tm_min > 30)
    if ( (boot = fopen("./reboot", "r"))) {
      if (t_info->tm_min > 50) {
	log("Reboot exists.");
	fread(&dummy, sizeof(dummy), 1, boot);
	if (!feof(boot)) {  /* the file is nonepty */
	  log("Reboot is nonempty.");
	  if (system("./reboot")) {
	    log("Reboot script terminated abnormally");
	    send_to_all("The reboot was cancelled.\n\r");
	    system("mv ./reboot reboot.FAILED");
	    fclose(boot);
	    return;
	  } else
	    system("mv ./reboot reboot.SUCCEEDED");
	}
	
	send_to_all("Automatic reboot. Come back in a little while.\n\r");
	terminate = game_reboot = 1;
      } else if (t_info->tm_min > 40)
	send_to_all("ATTENTION: DikuMUD will reboot in 10 minutes.\n\r");
      else if (t_info->tm_min > 30)
	send_to_all(
		    "Warning: The game will close and reboot in 20 minutes.\n\r");

      fclose(boot);
    }
}