/*
 * PVVMUD a 3D MUD
 * Copyright (C) 1998-1999  Programvareverkstedet (pvv@pvv.org)
 *
 * 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, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "namedb.H"
#include "crossindex.H"
#include "exception.H"

CNameDBItem::CNameDBItem(int id,char *name) {
  next=NULL;
  this->id=id;
  this->name=new char[strlen(name)+1];
  strcpy(this->name,name);
}

int CNameDB::insert(char * name) {
  CNameDBItem *newItem,*currItem,*nextItem;

  if (first == NULL){
    first = new CNameDBItem(++currentId,name);
    return currentId;
  }
   
  currItem = NULL;
  nextItem = first;

  while ((nextItem != NULL) && (strcmp(nextItem->getName(),name)<=0)) {
    currItem = nextItem;
    nextItem = currItem->getNext();
  }

  if ((currItem != NULL) && (strcmp(currItem->getName(),name)==0)) 
    return currItem->getId();

  newItem = new CNameDBItem(++currentId,name);
  newItem->setNext(nextItem);
  if (currItem == NULL) first = newItem;
  else currItem->setNext(newItem);
  
  return currentId;
}

int CNameDB::add(int id, char * name) {
  //NameDBItem_t *newItem,*currItem,*nextItem;
  CNameDBItem *newItem;

  newItem = new CNameDBItem(id,name);
  if (currentId < id ) currentId = id;

  newItem->setNext(first);
  first = newItem;

  return id;
}

char * CNameDB::findName(int id){
  CNameDBItem * currItem;
  
  currItem = first;

  while (currItem != NULL){
    if (currItem->getId() == id) return currItem->getName();
    currItem = currItem->getNext();
  }

  return NULL;
}

int CNameDB::findId(char * name){
  CNameDBItem * currItem;
  
  currItem = first;

  while (currItem != NULL){
    if (strcmp(currItem->getName(),name) == 0) return currItem->getId();
    currItem = currItem->getNext();
  }

  return -1;
}

void CNameDB::save(char *fileName){
  FILE * ndbFile;
  ndbFile = fopen(fileName,"w+");
  if (ndbFile == NULL) throw new CException();
  writeNDB(ndbFile);
  fclose(ndbFile);
}

void CNameDB::load(char *fileName){
  FILE * ndbFile;
  ndbFile = fopen(fileName,"r");
  if (ndbFile == NULL) throw new CException();
  readNDB(ndbFile);
  fclose(ndbFile);
}

void CNameDB::writeNDB(FILE * ndbfile){
  CNameDBItem * currItem;

  currItem = first;

  while(currItem != NULL){
    fprintf(ndbfile,"%i : %s\n",currItem->getId(),currItem->getName());
    currItem = currItem->getNext();
  }

}

void CNameDB::readNDB(FILE * ndbfile) {
  char name[256];
  int id;

  while (fscanf(ndbfile,"%i : %255s\n",&id,name)==2 ){
    add(id,name);
  }
}

CCrossIndex * CNameDB::merge(CNameDB * mergeDB){
  CCrossIndex * crossIndex;
  CNameDBItem * mergeItem;

  crossIndex = new CCrossIndex;

  mergeItem = mergeDB->getFirst();

  while (mergeItem != NULL){

    crossIndex->add(insert(mergeItem->getName()),mergeItem->getId());
    mergeItem = mergeItem->getNext();
  }

  return crossIndex;
}