/* ************************************************************************
*   File: act.movement.c                                Part of CircleMUD *
*  Usage: movement commands, door handling, & sleep/rest/etc state        *
*                                                                         *
*  All rights reserved.  See license.doc for complete information.        *
*                                                                         *
*  Copyright (C) 1993, 94 by the Trustees of the Johns Hopkins University *
*  CircleMUD is based on DikuMUD, Copyright (C) 1990, 1991.               *
************************************************************************ */

#include <stdio.h>
#include <string.h>

#include "structs.h"
#include "utils.h"
#include "comm.h"
#include "interpreter.h"
#include "handler.h"
#include "db.h"
#include "spells.h"
#include "house.h"

/* external vars  */
extern struct room_data *world;
extern struct char_data *character_list;
extern struct descriptor_data *descriptor_list;
extern struct index_data *obj_index;
extern int rev_dir[];
extern char *dirs[];
extern int movement_loss[];

/* external functs */
int special(struct char_data * ch, int cmd, char *arg);
void death_cry(struct char_data * ch);


/* do_simple_move assumes
 *	1. That there is no master and no followers.
 *	2. That the direction exists.
 *
 *   Returns :
 *   1 : If succes.
 *   0 : If fail
 */
int do_simple_move(struct char_data * ch, int dir, int need_specials_check)
{
  int was_in, need_movement, has_boat = 0;
  struct obj_data *obj;

  int special(struct char_data * ch, int cmd, char *arg);

  /*
   * Check for special routines (North is 1 in command list, but 0 here) Note
   * -- only check if following; this avoids 'double spec-proc' bug
   */
  if (need_specials_check && special(ch, dir + 1, ""))
    return 0;

  /* charmed? */
  if (IS_AFFECTED(ch, AFF_CHARM) && ch->master && ch->in_room == ch->master->in_room) {
    send_to_char("The thought of leaving your master makes you weep.\r\n", ch);
    act("$n bursts into tears.", FALSE, ch, 0, 0, TO_ROOM);
    return 0;
  }
  /* if this room or the one we're going to needs a boat, check for one */
  if ((world[ch->in_room].sector_type == SECT_WATER_NOSWIM) ||
      (world[EXIT(ch, dir)->to_room].sector_type == SECT_WATER_NOSWIM)) {
    for (obj = ch->carrying; obj; obj = obj->next_content)
      if (GET_OBJ_TYPE(obj) == ITEM_BOAT)
	has_boat = TRUE;
    if (!has_boat) {
      send_to_char("You need a boat to go there.\r\n", ch);
      return 0;
    }
  }
  need_movement = (movement_loss[world[ch->in_room].sector_type] +
		   movement_loss[world[world[ch->in_room].dir_option[dir]->to_room].sector_type]) >> 1;

  if (GET_MOVE(ch) < need_movement && !IS_NPC(ch)) {
    if (need_specials_check && ch->master)
      send_to_char("You are too exhausted to follow.\r\n", ch);
    else
      send_to_char("You are too exhausted.\r\n", ch);

    return 0;
  }
  if (IS_SET(ROOM_FLAGS(ch->in_room), ROOM_ATRIUM))
    if (!House_can_enter(ch, world[EXIT(ch, dir)->to_room].number)) {
      send_to_char("That's private property -- no trespassing!\r\n", ch);
      return 0;
    }
  if (GET_LEVEL(ch) < LVL_IMMORT && !IS_NPC(ch))
    GET_MOVE(ch) -= need_movement;

  if (!IS_AFFECTED(ch, AFF_SNEAK)) {
    sprintf(buf2, "$n leaves %s.", dirs[dir]);
    act(buf2, TRUE, ch, 0, 0, TO_ROOM);
  }
  was_in = ch->in_room;
  char_from_room(ch);
  char_to_room(ch, world[was_in].dir_option[dir]->to_room);

  if (!IS_AFFECTED(ch, AFF_SNEAK))
    act("$n has arrived.", TRUE, ch, 0, 0, TO_ROOM);

  look_at_room(ch, 0);

  if (IS_SET(ROOM_FLAGS(ch->in_room), ROOM_DEATH) && GET_LEVEL(ch) < LVL_IMMORT) {
    log_death_trap(ch);
    death_cry(ch);
    extract_char(ch);
    return 0;
  }
  return 1;
}


int perform_move(struct char_data * ch, int dir, int need_specials_check)
{
  int was_in;
  struct follow_type *k, *next;

  if (ch == NULL || dir < 0 || dir >= NUM_OF_DIRS)
    return 0;
  else if (!EXIT(ch, dir) || EXIT(ch, dir)->to_room == NOWHERE)
    send_to_char("Alas, you cannot go that way...\r\n", ch);
  else if (IS_SET(EXIT(ch, dir)->exit_info, EX_CLOSED)) {
    if (EXIT(ch, dir)->keyword) {
      sprintf(buf2, "The %s seems to be closed.\r\n", fname(EXIT(ch, dir)->keyword));
      send_to_char(buf2, ch);
    } else
      send_to_char("It seems to be closed.\r\n", ch);
  } else {
    if (!ch->followers)
      return (do_simple_move(ch, dir, need_specials_check));

    was_in = ch->in_room;
    if (!do_simple_move(ch, dir, need_specials_check))
      return 0;

    for (k = ch->followers; k; k = next) {
      next = k->next;
      if ((was_in == k->follower->in_room) &&
	  (GET_POS(k->follower) >= POS_STANDING)) {
	act("You follow $N.\r\n", FALSE, k->follower, 0, ch, TO_CHAR);
	perform_move(k->follower, dir, 1);
      }
    }
    return 1;
  }
  return 0;
}


ACMD(do_move)
{
  /*
   * This is basically a mapping of cmd numbers to perform_move indices.
   * It cannot be done in perform_move because perform_move is called
   * by other functions which do not require the remapping.
   */
  perform_move(ch, cmd - 1, 0);
}


int find_door(struct char_data * ch, char *type, char *dir)
{
  int door;

  if (*dir) {			/* a direction was specified */
    if ((door = search_block(dir, dirs, FALSE)) == -1) {	/* Partial Match */
      send_to_char("That's not a direction.\r\n", ch);
      return -1;
    }
    if (EXIT(ch, door))
      if (EXIT(ch, door)->keyword)
	if (isname(type, EXIT(ch, door)->keyword))
	  return door;
	else {
	  sprintf(buf2, "I see no %s there.\r\n", type);
	  send_to_char(buf2, ch);
	  return -1;
	}
      else
	return door;
    else {
      send_to_char("I really don't see how you can close anything there.\r\n", ch);
      return -1;
    }
  } else {			/* try to locate the keyword */
    for (door = 0; door < NUM_OF_DIRS; door++)
      if (EXIT(ch, door))
	if (EXIT(ch, door)->keyword)
	  if (isname(type, EXIT(ch, door)->keyword))
	    return door;

    sprintf(buf2, "There doesn't seem to be %s %s here.\r\n", AN(type), type);
    send_to_char(buf2, ch);
    return -1;
  }
}


int has_key(struct char_data * ch, int key)
{
  struct obj_data *o;

  for (o = ch->carrying; o; o = o->next_content)
    if (GET_OBJ_VNUM(o) == key)
      return 1;

  if (ch->equipment[WEAR_HOLD])
    if (GET_OBJ_VNUM(ch->equipment[WEAR_HOLD]) == key)
      return 1;

  return 0;
}



#define NEED_OPEN	1
#define NEED_CLOSED	2
#define NEED_UNLOCKED	4
#define NEED_LOCKED	8

char *cmd_door[] = {
        "open",
        "close",
        "unlock",
        "lock",
        "pick"
} ;

const int flags_door[] = {
	NEED_CLOSED | NEED_UNLOCKED,
	NEED_OPEN,
	NEED_CLOSED | NEED_LOCKED,
	NEED_CLOSED | NEED_UNLOCKED,
	NEED_CLOSED | NEED_LOCKED
} ;


#define EXITN(room, door)		(world[room].dir_option[door])
#define OPEN_DOOR(room, obj, door)	((obj) ?\
		(TOGGLE_BIT(GET_OBJ_VAL(obj, 1), CONT_CLOSED)) :\
		(TOGGLE_BIT(EXITN(room, door)->exit_info, EX_CLOSED)))
#define LOCK_DOOR(room, obj, door)	((obj) ?\
		(TOGGLE_BIT(GET_OBJ_VAL(obj, 1), CONT_LOCKED)) :\
		(TOGGLE_BIT(EXITN(room, door)->exit_info, EX_LOCKED)))

void do_doorcmd(struct char_data *ch, struct obj_data *obj, int door, int scmd)
{
  int other_room;
  struct room_direction_data *back = 0;

  sprintf(buf, "$n %ss ", cmd_door[scmd]);
  if (!obj && ((other_room = EXIT(ch, door)->to_room) != NOWHERE))
    if ((back = world[other_room].dir_option[rev_dir[door]]))
      if (back->to_room != ch->in_room)
	back = 0;

  switch (scmd) {
    case SCMD_OPEN:
    case SCMD_CLOSE:
      OPEN_DOOR(ch->in_room, obj, door);
      if (back)
	OPEN_DOOR(other_room, obj, rev_dir[door]);
      send_to_char(OK, ch);
      break;
    case SCMD_UNLOCK:
    case SCMD_LOCK:
      LOCK_DOOR(ch->in_room, obj, door);
      if (back)
	LOCK_DOOR(other_room, obj, rev_dir[door]);
      send_to_char("*Click*\r\n", ch);
      break;
    case SCMD_PICK:
      LOCK_DOOR(ch->in_room, obj, door);
      if (back)
	LOCK_DOOR(other_room, obj, rev_dir[door]);
      send_to_char("The lock quickly yields to your skills.\r\n", ch);
      strcpy(buf, "$n skillfully picks the lock on ");
      break;
  }
  /* Notify the room */
  sprintf(buf + strlen(buf), "%s%s.", ((obj) ? "" : "the "), (obj) ? "$p" :
   (EXIT(ch, door)->keyword ? "$F" : "door"));
  if (!(obj) || (obj->in_room != NOWHERE))
    act(buf, FALSE, ch, obj, EXIT(ch, door)->keyword, TO_ROOM);

  /* Notify the other room */
  if (((scmd == SCMD_OPEN) || (scmd == SCMD_CLOSE)) && (back)) {
    sprintf(buf, "The %s is %s%s from the other side.\r\n", 
     (back->keyword ? fname(back->keyword) : "door"), cmd_door[scmd],
     (scmd == SCMD_CLOSE) ? "d" : "ed");
    send_to_room(buf, EXIT(ch, door)->to_room);
  }
}


int ok_pick(struct char_data *ch, int keynum, int pickproof, int scmd)
{
  int percent;

  percent = number(1, 101);

  if (scmd == SCMD_PICK) {
    if (keynum < 0)
      send_to_char("Odd - you can't seem to find a keyhole.\r\n", ch);
    else if (pickproof)
      send_to_char("It resists your attempts at picking it.\r\n", ch);
    else if (percent > GET_SKILL(ch, SKILL_PICK_LOCK))
      send_to_char("You failed to pick the lock.\r\n", ch);
    else
      return(1);
    return(0);
  }
  return(1);
}


#define DOOR_IS_OPENABLE(ch, obj, door)	((obj) ? \
			((GET_OBJ_TYPE(obj) == ITEM_CONTAINER) && \
			(IS_SET(GET_OBJ_VAL(obj, 1), CONT_CLOSEABLE))) :\
			(IS_SET(EXIT(ch, door)->exit_info, EX_ISDOOR)))
#define DOOR_IS_OPEN(ch, obj, door)	((obj) ? \
			(!IS_SET(GET_OBJ_VAL(obj, 1), CONT_CLOSED)) :\
			(!IS_SET(EXIT(ch, door)->exit_info, EX_CLOSED)))
#define DOOR_IS_UNLOCKED(ch, obj, door)	((obj) ? \
			(!IS_SET(GET_OBJ_VAL(obj, 1), CONT_LOCKED)) :\
			(!IS_SET(EXIT(ch, door)->exit_info, EX_LOCKED)))
#define DOOR_IS_PICKPROOF(ch, obj, door) ((obj) ? \
			(IS_SET(GET_OBJ_VAL(obj, 1), CONT_PICKPROOF)) : \
			(IS_SET(EXIT(ch, door)->exit_info, EX_PICKPROOF)))

#define DOOR_IS_CLOSED(ch, obj, door)	(!(DOOR_IS_OPEN(ch, obj, door)))
#define DOOR_IS_LOCKED(ch, obj, door)	(!(DOOR_IS_UNLOCKED(ch, obj, door)))
#define DOOR_KEY(ch, obj, door)		((obj) ? (GET_OBJ_VAL(obj, 2)) : \
					(EXIT(ch, door)->key))
#define DOOR_LOCK(ch, obj, door)	((obj) ? (GET_OBJ_VAL(obj, 1)) : \
					(EXIT(ch, door)->exit_info))

ACMD(do_gen_door)
{
  int door, keynum;
  char type[MAX_INPUT_LENGTH], dir[MAX_INPUT_LENGTH];
  struct obj_data *obj;
  struct char_data *victim;

  if (*arg) {
    two_arguments(argument, type, dir);
    if (!generic_find(type, FIND_OBJ_INV | FIND_OBJ_ROOM, ch, &victim, &obj))
      door = find_door(ch, type, dir);

    if ((obj) || (door >= 0)) {
      keynum = DOOR_KEY(ch, obj, door);
      if (!(DOOR_IS_OPENABLE(ch, obj, door)))
	act("You can't $F that!", FALSE, ch, 0, cmd_door[subcmd], TO_CHAR);
      else if (!DOOR_IS_OPEN(ch, obj, door) &&
       IS_SET(flags_door[subcmd], NEED_OPEN))
	send_to_char("But it's already closed!\r\n", ch);
      else if (!DOOR_IS_CLOSED(ch, obj, door) && 
       IS_SET(flags_door[subcmd], NEED_CLOSED))
	send_to_char("But it's currently open!\r\n", ch);
      else if (!(DOOR_IS_LOCKED(ch, obj, door)) && 
       IS_SET(flags_door[subcmd], NEED_LOCKED))
	send_to_char("Oh.. it wasn't locked, after all..\r\n", ch);
      else if (!(DOOR_IS_UNLOCKED(ch, obj, door)) && 
       IS_SET(flags_door[subcmd], NEED_UNLOCKED))
	send_to_char("It seems to be locked.\r\n", ch);
      else if (!has_key(ch, keynum) && (GET_LEVEL(ch) < LVL_GOD) &&
       ((subcmd == SCMD_LOCK) || (subcmd == SCMD_UNLOCK)))
	send_to_char("You don't seem to have the proper key.\r\n", ch);
      else if (ok_pick(ch, keynum, DOOR_IS_PICKPROOF(ch, obj, door), subcmd))
	do_doorcmd(ch, obj, door, subcmd); 
    }
    return;
  } 

  sprintf(buf, "%s what?\r\n", cmd_door[subcmd]);
  send_to_char(CAP(buf), ch);
}



ACMD(do_enter)
{
  int door;

  one_argument(argument, buf);

  if (*buf) {			/* an argument was supplied, search for door
				 * keyword */
    for (door = 0; door < NUM_OF_DIRS; door++)
      if (EXIT(ch, door))
	if (EXIT(ch, door)->keyword)
	  if (!str_cmp(EXIT(ch, door)->keyword, buf)) {
	    perform_move(ch, door, 1);
	    return;
	  }
    sprintf(buf2, "There is no %s here.\r\n", buf);
    send_to_char(buf2, ch);
  } else if (IS_SET(ROOM_FLAGS(ch->in_room), ROOM_INDOORS))
    send_to_char("You are already indoors.\r\n", ch);
  else {
    /* try to locate an entrance */
    for (door = 0; door < NUM_OF_DIRS; door++)
      if (EXIT(ch, door))
	if (EXIT(ch, door)->to_room != NOWHERE)
	  if (!IS_SET(EXIT(ch, door)->exit_info, EX_CLOSED) &&
	      IS_SET(ROOM_FLAGS(EXIT(ch, door)->to_room), ROOM_INDOORS)) {
	    perform_move(ch, door, 1);
	    return;
	  }
    send_to_char("You can't seem to find anything to enter.\r\n", ch);
  }
}


ACMD(do_leave)
{
  int door;

  if (!IS_SET(ROOM_FLAGS(ch->in_room), ROOM_INDOORS))
    send_to_char("You are outside.. where do you want to go?\r\n", ch);
  else {
    for (door = 0; door < NUM_OF_DIRS; door++)
      if (EXIT(ch, door))
	if (EXIT(ch, door)->to_room != NOWHERE)
	  if (!IS_SET(EXIT(ch, door)->exit_info, EX_CLOSED) &&
	      !IS_SET(ROOM_FLAGS(EXIT(ch, door)->to_room), ROOM_INDOORS)) {
	    perform_move(ch, door, 1);
	    return;
	  }
    send_to_char("I see no obvious exits to the outside.\r\n", ch);
  }
}


ACMD(do_stand)
{
  switch (GET_POS(ch)) {
  case POS_STANDING:
    act("You are already standing.", FALSE, ch, 0, 0, TO_CHAR);
    break;
  case POS_SITTING:
    act("You stand up.", FALSE, ch, 0, 0, TO_CHAR);
    act("$n clambers to $s feet.", TRUE, ch, 0, 0, TO_ROOM);
    GET_POS(ch) = POS_STANDING;
    break;
  case POS_RESTING:
    act("You stop resting, and stand up.", FALSE, ch, 0, 0, TO_CHAR);
    act("$n stops resting, and clambers on $s feet.", TRUE, ch, 0, 0, TO_ROOM);
    GET_POS(ch) = POS_STANDING;
    break;
  case POS_SLEEPING:
    act("You have to wake up first!", FALSE, ch, 0, 0, TO_CHAR);
    break;
  case POS_FIGHTING:
    act("Do you not consider fighting as standing?", FALSE, ch, 0, 0, TO_CHAR);
    break;
  default:
    act("You stop floating around, and put your feet on the ground.",
	FALSE, ch, 0, 0, TO_CHAR);
    act("$n stops floating around, and puts $s feet on the ground.",
	TRUE, ch, 0, 0, TO_ROOM);
    GET_POS(ch) = POS_STANDING;
    break;
  }
}


ACMD(do_sit)
{
  switch (GET_POS(ch)) {
  case POS_STANDING:
    act("You sit down.", FALSE, ch, 0, 0, TO_CHAR);
    act("$n sits down.", FALSE, ch, 0, 0, TO_ROOM);
    GET_POS(ch) = POS_SITTING;
    break;
  case POS_SITTING:
    send_to_char("You're sitting already.\r\n", ch);
    break;
  case POS_RESTING:
    act("You stop resting, and sit up.", FALSE, ch, 0, 0, TO_CHAR);
    act("$n stops resting.", TRUE, ch, 0, 0, TO_ROOM);
    GET_POS(ch) = POS_SITTING;
    break;
  case POS_SLEEPING:
    act("You have to wake up first.", FALSE, ch, 0, 0, TO_CHAR);
    break;
  case POS_FIGHTING:
    act("Sit down while fighting? are you MAD?", FALSE, ch, 0, 0, TO_CHAR);
    break;
  default:
    act("You stop floating around, and sit down.", FALSE, ch, 0, 0, TO_CHAR);
    act("$n stops floating around, and sits down.", TRUE, ch, 0, 0, TO_ROOM);
    GET_POS(ch) = POS_SITTING;
    break;
  }
}


ACMD(do_rest)
{
  switch (GET_POS(ch)) {
  case POS_STANDING:
    act("You sit down and rest your tired bones.", FALSE, ch, 0, 0, TO_CHAR);
    act("$n sits down and rests.", TRUE, ch, 0, 0, TO_ROOM);
    GET_POS(ch) = POS_RESTING;
    break;
  case POS_SITTING:
    act("You rest your tired bones.", FALSE, ch, 0, 0, TO_CHAR);
    act("$n rests.", TRUE, ch, 0, 0, TO_ROOM);
    GET_POS(ch) = POS_RESTING;
    break;
  case POS_RESTING:
    act("You are already resting.", FALSE, ch, 0, 0, TO_CHAR);
    break;
  case POS_SLEEPING:
    act("You have to wake up first.", FALSE, ch, 0, 0, TO_CHAR);
    break;
  case POS_FIGHTING:
    act("Rest while fighting?  Are you MAD?", FALSE, ch, 0, 0, TO_CHAR);
    break;
  default:
    act("You stop floating around, and stop to rest your tired bones.",
	FALSE, ch, 0, 0, TO_CHAR);
    act("$n stops floating around, and rests.", FALSE, ch, 0, 0, TO_ROOM);
    GET_POS(ch) = POS_SITTING;
    break;
  }
}


ACMD(do_sleep)
{
  switch (GET_POS(ch)) {
  case POS_STANDING:
  case POS_SITTING:
  case POS_RESTING:
    send_to_char("You go to sleep.\r\n", ch);
    act("$n lies down and falls asleep.", TRUE, ch, 0, 0, TO_ROOM);
    GET_POS(ch) = POS_SLEEPING;
    break;
  case POS_SLEEPING:
    send_to_char("You are already sound asleep.\r\n", ch);
    break;
  case POS_FIGHTING:
    send_to_char("Sleep while fighting?  Are you MAD?\r\n", ch);
    break;
  default:
    act("You stop floating around, and lie down to sleep.",
	FALSE, ch, 0, 0, TO_CHAR);
    act("$n stops floating around, and lie down to sleep.",
	TRUE, ch, 0, 0, TO_ROOM);
    GET_POS(ch) = POS_SLEEPING;
    break;
  }
}


ACMD(do_wake)
{
  struct char_data *vict;
  int self = 0;

  one_argument(argument, arg);
  if (*arg) {
    if (GET_POS(ch) == POS_SLEEPING)
      send_to_char("You can't wake people up if you're asleep yourself!\r\n", ch);
    else if ((vict = get_char_room_vis(ch, arg)) == NULL)
      send_to_char(NOPERSON, ch);
    else if (vict == ch)
      self = 1;
    else if (GET_POS(vict) > POS_SLEEPING)
      act("$E is already awake.", FALSE, ch, 0, vict, TO_CHAR);
    else if (IS_AFFECTED(vict, AFF_SLEEP))
      act("You can't wake $M up!", FALSE, ch, 0, vict, TO_CHAR);
    else {
      act("You wake $M up.", FALSE, ch, 0, vict, TO_CHAR);
      act("You are awakened by $n.", FALSE, ch, 0, vict, TO_VICT | TO_SLEEP);
      GET_POS(vict) = POS_SITTING;
    }
    if (!self)
      return;
  }
  if (IS_AFFECTED(ch, AFF_SLEEP))
    send_to_char("You can't wake up!\r\n", ch);
  else if (GET_POS(ch) > POS_SLEEPING)
    send_to_char("You are already awake...\r\n", ch);
  else {
    send_to_char("You awaken, and sit up.\r\n", ch);
    act("$n awakens.", TRUE, ch, 0, 0, TO_ROOM);
    GET_POS(ch) = POS_SITTING;
  }
}


ACMD(do_follow)
{
  struct char_data *leader;

  void stop_follower(struct char_data * ch);
  void add_follower(struct char_data * ch, struct char_data * leader);

  one_argument(argument, buf);

  if (*buf) {
    if (!(leader = get_char_room_vis(ch, buf))) {
      send_to_char(NOPERSON, ch);
      return;
    }
  } else {
    send_to_char("Whom do you wish to follow?\r\n", ch);
    return;
  }

  if (ch->master == leader) {
    act("You are already following $M.", FALSE, ch, 0, leader, TO_CHAR);
    return;
  }
  if (IS_AFFECTED(ch, AFF_CHARM) && (ch->master)) {
    act("But you only feel like following $N!", FALSE, ch, 0, ch->master, TO_CHAR);
  } else {			/* Not Charmed follow person */
    if (leader == ch) {
      if (!ch->master) {
	send_to_char("You are already following yourself.\r\n", ch);
	return;
      }
      stop_follower(ch);
    } else {
      if (circle_follow(ch, leader)) {
	act("Sorry, but following in loops is not allowed.", FALSE, ch, 0, 0, TO_CHAR);
	return;
      }
      if (ch->master)
	stop_follower(ch);
      REMOVE_BIT(AFF_FLAGS(ch), AFF_GROUP);
      add_follower(ch, leader);
    }
  }
}