text: /*
  Copyright (C) 2009-2019 Parallel Realities
  
  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, 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA.
  */
  
  #include "../headers.h"
  
  #include "../collisions.h"
  #include "../entity.h"
  #include "../graphics/animation.h"
  #include "../item/key_items.h"
  #include "../system/error.h"
  #include "../system/properties.h"
  #include "../system/random.h"
  
  extern Entity *self;
  
  static void entityWait(void);
  static void touch(Entity *);
  static void activate(int);
  
  Entity *addSafeCombination(int x, int y, char *name)
  {
  	Entity *e = getFreeEntity();
  
  	if (e == NULL)
  	{
  		showErrorAndExit("No free slots to add a Safe Combination");
  	}
  
  	loadProperties(name, e);
  
  	e->x = x;
  	e->y = y;
  
  	e->type = KEY_ITEM;
  
  	e->face = RIGHT;
  
  	e->action = &entityWait;
  
  	e->draw = &drawLoopingAnimationToMap;
  
  	e->touch = &touch;
  
  	e->activate = &activate;
  
  	e->active = FALSE;
  
  	setEntityAnimation(e, "STAND");
  
  	return e;
  }
  
  static void entityWait()
  {
  	checkToMap(self);
  }
  
  static void touch(Entity *other)
  {
  	int i, unit, dir;
  	char combination[MAX_VALUE_LENGTH];
  
  	if (other->type == PLAYER)
  	{
  		if (strlen(self->requires) == 0)
  		{
  			dir = prand() % 2;
  
  			for (i=0;i<3;i++)
  			{
  				unit = 1 + prand() % 20;
  
  				snprintf(combination, sizeof(combination), "%s%d%s", self->requires, unit, dir == 0 ? "L" : "R");
  
  				STRNCPY(self->requires, combination, sizeof(self->requires));
  
  				dir = dir == 1 ? 0 : 1;
  			}
  
  			self->activate(1);
  		}
  	}
  
  	keyItemTouch(other);
  }
  
  static void activate(int val)
  {
  	char combination[MAX_VALUE_LENGTH], turns[5];
  	int i, j, length;
  
  	j = 0;
  
  	combination[0] = '\0';
  
  	length = strlen(self->requires);
  
  	for (i=0;i<length;i++)
  	{
  		if (isdigit(self->requires[i]))
  		{
  			turns[j++] = self->requires[i];
  
  			turns[j] = '\0';
  		}
  
  		else
  		{
  			val = atoi(turns);
  
  			if (strlen(combination) == 0)
  			{
  				snprintf(self->description, sizeof(self->description), "%d %s", val, self->requires[i] == 'L' ? _("Left") : _("Right"));
  			}
  
  			else
  			{
  				snprintf(self->description, sizeof(self->description), ", %d %s", val, self->requires[i] == 'L' ? _("Left") : _("Right"));
  			}
  
  			strncat(combination, self->description, MAX_MESSAGE_LENGTH - strlen(combination) - 1);
  
  			j = 0;
  
  			turns[j] = '\0';
  		}
  	}
  
  	STRNCPY(self->description, combination, sizeof(self->description));
  
  	snprintf(self->description, sizeof(self->description), _("A scrap of paper. \"%s\" is written on it"), combination);
  }
  