/***************************************************************************
 *  Original Diku Mud copyright (C) 1990, 1991 by Sebastian Hammer,        *
 *  Michael Seifert, Hans Henrik St{rfeldt, Tom Madsen, and Katja Nyboe.   *
 *                                                                         *
 *  Merc Diku Mud improvments copyright (C) 1992, 1993 by Michael          *
 *  Chastain, Michael Quan, and Mitchell Tse.                              *
 *                                                                         *
 *  In order to use any part of this Merc Diku Mud, you must comply with   *
 *  both the original Diku license in 'license.doc' as well the Merc       *
 *  license in 'license.txt'.  In particular, you may not remove either of *
 *  these copyright notices.                                               *
 *                                                                         *
 *       _/          _/_/_/     _/    _/     _/    ACK! MUD is modified    *
 *      _/_/        _/          _/  _/       _/    Merc2.0/2.1/2.2 code    *
 *     _/  _/      _/           _/_/         _/    (c)Stephen Dooley 1994  *
 *    _/_/_/_/      _/          _/  _/             "This mud has not been  *
 *   _/      _/      _/_/_/     _/    _/     _/      tested on animals."   *
 *                                                                         *
 *                                                                         *
 *  Much time and thought has gone into this software and you are          *
 *  benefitting.  We hope that you share your changes too.  What goes      *
 *  around, comes around.                                                  *
 ***************************************************************************/

/*
 *  This program goes through each area. It checks all vnums to see if
 *  they are in the allowed range. If not it moves them, and updates all
 *  references.
 */
#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "merc.h"
#include "hash.h"



void swap_global_hash(char Tp, void * Ptr, int old_vnum, int new_vnum)
{
 ROOM_INDEX_DATA * pRoomIndex,* prevRoomIndex;
 OBJ_INDEX_DATA  * pObjIndex ,* prevObjIndex;
 MOB_INDEX_DATA  * pMobIndex ,* prevMobIndex;
 
 extern ROOM_INDEX_DATA * room_index_hash[];
 extern OBJ_INDEX_DATA  * obj_index_hash[];
 extern MOB_INDEX_DATA  * mob_index_hash[];
 
 int iHash;
 
 
 switch (Tp)
 {
   case 'R':
        /* Delete old hash table entry */
    
        iHash   = old_vnum % MAX_KEY_HASH;
        prevRoomIndex = NULL;
        for (pRoomIndex = room_index_hash[iHash]; pRoomIndex != NULL; pRoomIndex=pRoomIndex->next)
        {
         if (pRoomIndex == (ROOM_INDEX_DATA *) Ptr)
          break;
         prevRoomIndex = pRoomIndex;
        }
        
        if (pRoomIndex != NULL)
        {
         if (prevRoomIndex == NULL)
          room_index_hash[iHash]=pRoomIndex->next;
         else
          prevRoomIndex->next=pRoomIndex->next;
        }
       
        /* Add another */    
        
     	iHash                   = new_vnum % MAX_KEY_HASH;
	pRoomIndex->next        = room_index_hash[iHash];
	room_index_hash[iHash]  = pRoomIndex;
	
	break;
   
   case 'M':
        /* Delete old hash table entry */
    
        iHash   = old_vnum % MAX_KEY_HASH;
        prevMobIndex = NULL;
        for (pMobIndex = mob_index_hash[iHash]; pMobIndex != NULL; pMobIndex=pMobIndex->next)
        {
         if (pMobIndex == (MOB_INDEX_DATA *) Ptr)
          break;
         prevMobIndex = pMobIndex;
        }
        
        if (pMobIndex != NULL)
        {
         if (prevMobIndex == NULL)
          mob_index_hash[iHash]=pMobIndex->next;
         else
          prevMobIndex->next=pMobIndex->next;
        }
       
        /* Add another */    
        
     	iHash                   = new_vnum % MAX_KEY_HASH;
	pMobIndex->next        = mob_index_hash[iHash];
	mob_index_hash[iHash]  = pMobIndex;
	
	break;
  
   case 'O':
        /* Delete old hash table entry */
    
        iHash   = old_vnum % MAX_KEY_HASH;
        prevObjIndex = NULL;
        for (pObjIndex = obj_index_hash[iHash]; pObjIndex != NULL; pObjIndex=pObjIndex->next)
        {
         if (pObjIndex == (OBJ_INDEX_DATA *) Ptr)
          break;
         prevObjIndex = pObjIndex;
        }
        
        if (pObjIndex != NULL)
        {
         if (prevObjIndex == NULL)
          obj_index_hash[iHash]=pObjIndex->next;
         else
          prevObjIndex->next=pObjIndex->next;
        }
       
        /* Add another */    
        
     	iHash                   = new_vnum % MAX_KEY_HASH;
	pObjIndex->next        = obj_index_hash[iHash];
	obj_index_hash[iHash]  = pObjIndex;
	
	break;
	
 }
 return;
 
}
   

void do_check_areas(CHAR_DATA * ch, char * argument)
{
 hash_table * room_hash;
 hash_table * obj_hash;
 hash_table * mob_hash;
 int           min_vnum,max_vnum;
 int           new_vnum,old_vnum;
 char          buffer[MAX_INPUT_LENGTH];
 FILE       *  out_file;
 int           a;
 RESET_DATA *  pReset;
 
 AREA_DATA * CurArea;
 BUILD_DATA_LIST * pList;
 ROOM_INDEX_DATA * pRoomIndex;
 OBJ_INDEX_DATA  * pObjIndex;
 MOB_INDEX_DATA  * pMobIndex;
 
 /* Create hash tables for rooms, mobiles, objects */

 room_hash=create_hash_table(MAX_KEY_HASH);
 obj_hash=create_hash_table(MAX_KEY_HASH);
 mob_hash=create_hash_table(MAX_KEY_HASH);
 
 out_file=fopen("area_changes.txt","a");
 
 for (CurArea=first_area; CurArea != NULL; CurArea=CurArea->next)
 {
  min_vnum=CurArea->min_vnum;
  max_vnum=CurArea->max_vnum;
  fprintf(out_file,"%s:\n",CurArea->name);
  
  /* Go through rooms */
  for (pList=CurArea->first_area_room; pList != NULL; pList=pList->next)
  {
   pRoomIndex=pList->data;
   if (pRoomIndex->vnum < min_vnum || pRoomIndex->vnum > max_vnum)
   {
    old_vnum=pRoomIndex->vnum;
    /* Find a free slot */
    for (new_vnum=min_vnum; new_vnum <= max_vnum; new_vnum++)
     if (get_room_index(new_vnum)==NULL)
      break;
   
    if (new_vnum > max_vnum)
    {
     sprintf(buffer,"Not enough vnums in area %s\n\r",CurArea->name);
     send_to_char(buffer,ch);
    }
    else
    {
     fprintf(out_file,"Room: [%5i] -> [%5i] %s\n",old_vnum,new_vnum,pRoomIndex->name);    
     /* Delete from room hashing table, and put new vnum in. */
     add_hash_entry(room_hash,old_vnum,(void *) new_vnum);
     swap_global_hash('R',pRoomIndex,old_vnum,new_vnum);
     pRoomIndex->vnum=new_vnum;
     area_modified(CurArea);
         
    }
   }
  }
  
  /* Go through objs */
  for (pList=CurArea->first_area_object; pList != NULL; pList=pList->next)
  {
   pObjIndex=pList->data;
   if (pObjIndex->vnum < min_vnum || pObjIndex->vnum > max_vnum)
   {
    old_vnum=pObjIndex->vnum;
    /* Find a free slot */
    for (new_vnum=min_vnum; new_vnum <= max_vnum; new_vnum++)
     if (get_obj_index(new_vnum)==NULL)
      break;
   
    if (new_vnum > max_vnum)
    {
     sprintf(buffer,"Not enough vnums in area %s\n\r",CurArea->name);
     send_to_char(buffer,ch);
    }
    else
    {
     fprintf(out_file,"Obj: [%5i] -> [%5i] %s\n",old_vnum,new_vnum,pObjIndex->short_descr);    
     /* Delete from obj hashing table, and put new vnum in. */
     add_hash_entry(obj_hash,old_vnum,(void *) new_vnum);
     swap_global_hash('O',pObjIndex,old_vnum,new_vnum);
     pObjIndex->vnum=new_vnum;
     area_modified(CurArea);
     
    }
   }
  }
  
  /* Go through mobs */
  for (pList=CurArea->first_area_mobile; pList != NULL; pList=pList->next)
  {
   pMobIndex=pList->data;
   if (pMobIndex->vnum < min_vnum || pMobIndex->vnum > max_vnum)
   {
    old_vnum=pMobIndex->vnum;
    /* Find a free slot */
    for (new_vnum=min_vnum; new_vnum <= max_vnum; new_vnum++)
     if (get_mob_index(new_vnum)==NULL)
      break;
   
    if (new_vnum > max_vnum)
    {
     sprintf(buffer,"Not enough vnums in area %s\n\r",CurArea->name);
     send_to_char(buffer,ch);
    }
    else
    {
     fprintf(out_file,"Mob: [%5i] -> [%5i] %s\n",old_vnum,new_vnum,pMobIndex->short_descr);    
     /* Delete from mob hashing table, and put new vnum in. */
     add_hash_entry(mob_hash,old_vnum,(void *) new_vnum);
     swap_global_hash('M',pMobIndex,old_vnum,new_vnum);
     pMobIndex->vnum=new_vnum;
     area_modified(CurArea);
     /* Check for shops */
     if (pMobIndex->pShop != NULL)
      pMobIndex->pShop->keeper=new_vnum;
     
    }
   }
  }
 }
 
 fclose(out_file);
 
 /* Now go through all things referencing the changes 
  * 
  *      Resets     
  *      exit->key
  *      
  */
  
 for (CurArea=first_area; CurArea != NULL; CurArea=CurArea->next)
 {
  for (pList=CurArea->first_area_room; pList != NULL; pList=pList->next)
  {
   /* Check keys and exits*/
   pRoomIndex=pList->data;
   
   for (a=0; a<=5; a++)
   {
    if (   pRoomIndex->exit[a] != NULL )
    {
     if (  pRoomIndex->exit[a]->key != 0
          && (new_vnum=(int) get_hash_entry(obj_hash,pRoomIndex->exit[a]->key)) != 0)
        {
         pRoomIndex->exit[a]->key = new_vnum;
         area_modified(CurArea);
        }
     if ( (new_vnum=(int) get_hash_entry(room_hash,pRoomIndex->exit[a]->vnum)) != 0)
        {
         pRoomIndex->exit[a]->vnum = new_vnum;
         area_modified(CurArea);
        }
    }
        
   }
  }
  
  /* Scan through resets */
  for (pReset=CurArea->first_reset; pReset != NULL; pReset=pReset->next)
  {
   switch (pReset->command)
   {
     case 'M':
       if ( (new_vnum=(int) get_hash_entry(mob_hash,pReset->arg1)) != 0)
       {
        area_modified(CurArea);
        pReset->arg1=new_vnum;
       }
       if ( (new_vnum=(int) get_hash_entry(room_hash,pReset->arg3)) != 0)
       {
        area_modified(CurArea);
        pReset->arg3=new_vnum;
       }
       break;
       
     case 'O':
       if ( (new_vnum=(int) get_hash_entry(obj_hash,pReset->arg1)) != 0)
       {
        area_modified(CurArea);
        pReset->arg1=new_vnum;
       }
       if ( (new_vnum=(int) get_hash_entry(room_hash,pReset->arg3)) != 0)
       {
        area_modified(CurArea);
        pReset->arg3=new_vnum;
       }
       break;
        
     case 'P':
       if ( (new_vnum=(int) get_hash_entry(obj_hash,pReset->arg1)) != 0)
       {
        area_modified(CurArea);
        pReset->arg1=new_vnum;
       }
       if ( (new_vnum=(int) get_hash_entry(obj_hash,pReset->arg3)) != 0)
       {
        area_modified(CurArea);
        pReset->arg3=new_vnum;
       }
       break;
       
     case 'G':
     case 'E':
       if ( (new_vnum=(int) get_hash_entry(obj_hash,pReset->arg1)) != 0)
       {
        area_modified(CurArea);
        pReset->arg1=new_vnum;
       }
       break;
       
     case 'D':
     case 'R':
       if ( (new_vnum=(int) get_hash_entry(room_hash,pReset->arg1)) != 0)
       {
        area_modified(CurArea);
        pReset->arg1=new_vnum;
       }
       break;
   }
     
  }
 }
  
 /* FINISHED */
  
 delete_hash_table(room_hash);
 delete_hash_table(obj_hash);
 delete_hash_table(mob_hash);

 return;  
}

void do_check_area(CHAR_DATA * ch, char * argument)
{
 send_to_char("You must say check_areas in full.\n\r",ch);
 return;
}