/*
   orxonox - the future of 3D-vertical-scrollers

   Copyright (C) 2004 orx

   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, or (at your option)
   any later version.

   ### File Specific:
   main-programmer: Benjamin Grauer
   co-programmer: ...
*/

//#define DEBUG_SPECIAL_MODULE DEBUG_MODULE_

#include "class_list.h"
#include "base_object.h"

#include "compiler.h"
#include "debug.h"
#include <string.h>
#include <math.h>
#include <algorithm>
#include "shell_command.h"

using namespace std;

#ifndef NO_SHELL_COMMAND
SHELL_COMMAND_STATIC(debug, ClassList, ClassList::debugS)
    ->describe("Shows all registered classes, if param1: is a valid ClassName only values of this class are shown. param2: how much output")
    ->defaultValues(2, NULL, 1);
#endif

/**
 *  Creates a new ClassList
*/
ClassList::ClassList(const long& classID, const char* className)
{
  this->className = className;
  this->classID = classID;
}

/**
 *  standard deconstructor
*/
ClassList::~ClassList ()
{
//   ClassList::classList->clear());
}

//! a List of all known Classes.
std::list<ClassList>* ClassList::classList = NULL;

//! a List of all strings of all classes, that have registered so far.
std::list<const char*> ClassList::classNames;

/**
 * Adds a new Object to the ClassList (and if necessary a new Class)
 * @param objectPointer Pointer to the Object at hand
 * @param classID ID of the Given ObjectType \see ClassID
 * @param className name of the Class to add
 *
 * !! FIRST YOU HAVE TO CALL THIS FUNCTION ONCE
 * !! Before unsing the ClassList, as it creates the ClassLits
 */
void ClassList::addToClassList(BaseObject* objectPointer, ClassID classID, const char* className)
{
  if (unlikely(classList == NULL))
    ClassList::classList = new list<ClassList>();

  PRINTF(5)("subscribe a '%s'\n", className );

  ClassList* regClass = ClassList::getClassList(classID);
  if (regClass != NULL)
    regClass->objectList.push_back(objectPointer);
  else
  {
    ClassList::classList->push_back(ClassList(classID, className));
    ClassList::classList->back().objectList.push_back(objectPointer);
  }
}

/**
 * removes an Object from a the ClassList
 * @param objectPointer the Object to delete from the List
 */
void ClassList::removeFromClassList(BaseObject* objectPointer)
{
  list<ClassList>::iterator cl;
  for(cl = ClassList::classList->begin(); cl != ClassList::classList->end(); cl++)
  {
    if (objectPointer->isA((*cl).classID))
    {
      std::list<BaseObject*>::iterator bo;
      for (bo = (*cl).objectList.begin(); bo != (*cl).objectList.end(); bo++)
      {
        if ((*bo) == objectPointer)
        {
          (*cl).objectList.erase(bo);
          break;
        }
      }
    }
  }
}

/**
 * grabs the names of all Classes, and injects it into a List of const chars
 * @return the generated List
 *
 * This function first looks, if the List has been changed (by the ListSize)
 * befor it changes anything.
 */
const std::list<const char*>* ClassList::getClassNames()
{
  if (ClassList::classNames.size() != ClassList::classList->size())
  {
      ClassList::classNames.clear();

      list<ClassList>::const_iterator cl;
      for (cl = ClassList::classList->begin(); cl != ClassList::classList->end(); cl++)
        ClassList::classNames.push_back((*cl).className);
  }

  return &ClassList::classNames;
}

/**
 * searches for classID and returns the list of Entities
 * @param classID the ID of the class to get the list from
 * @return the List accessed by classID, or NULL if not found
 */
std::list<BaseObject*>* ClassList::getList(ClassID classID)
{
  ClassList* fl;
  return ((fl = ClassList::getClassList(classID)) != NULL)?
       &(fl->objectList) : NULL;

/*
  std::list<ClassList>::iterator classIT = find (classList->begin(), classList->end(), classID);
  return (likely(classIT != classList->end()))? &(*classIT).objectList : NULL;*/

/*  for (classIT = ClassList::classList->begin(); classIT != ClassList::classList->end(); classIT++)
  {
    if ((*classIT) == classID )
      return &(*classIT).objectList;
  }
  return NULL;*/
}

/**
 * searches for className and returns the list of Entities
 * @param className the name of the class to get the list from
 * @return the List accessed by classID, or NULL if not found
 */
std::list<BaseObject*>* ClassList::getList(const char* className)
{
  ClassList* fl;
  return ((fl = ClassList::getClassList(className)) != NULL)?
      &(fl->objectList) : NULL;

  /*
  std::list<ClassList>::iterator classIT = find (classList->begin(), classList->end(), className);
  return (likely(classIT != classList->end()))? &(*classIT).objectList : NULL;*/


/*  for (classIT = ClassList::classList->begin(); classIT != ClassList::classList->end(); classIT++)
  {
    if ((*classIT) == className )
      return &(*classIT).objectList;
  }
  return NULL;*/
}


ClassList* ClassList::getClassList(ClassID classID)
{
  std::list<ClassList>::iterator classIT = find (ClassList::classList->begin(), ClassList::classList->end(), classID);
  return (likely(classIT != classList->end()))? &(*classIT) : NULL;
}


ClassList* ClassList::getClassList(const char* className)
{
  if (className == NULL)
    return NULL;
  std::list<ClassList>::iterator classIT = find (classList->begin(), classList->end(), className);
  return (likely(classIT != classList->end()))? &(*classIT) : NULL;
}


/**
 * checks if the BaseObject* object exists.
 * @param objectName the name of the BaseObject to look for
 * @param classID if not CL_NULL it will only search through a specific type of Objects. Otherwise it will be searched everywhere.
 * @return true, if the Object Exists in the specified ClassID, false otherwise
 * @todo: speed this up!!
 */
BaseObject* ClassList::getObject(const char* objectName, ClassID classID)
{
  if (classID != CL_NULL)
  {
    ClassList* cl = ClassList::getClassList(classID);
    if (cl != NULL)
    {
      std::list<BaseObject*>::iterator bo;
      for (bo = cl->objectList.begin(); bo != cl->objectList.end(); bo++)
        if ((*bo)->getName() != NULL && !strcmp((*bo)->getName(), objectName))
          return (*bo);
    }
  }
  else
  {
    list<ClassList>::iterator cl;
    for (cl = ClassList::classList->begin(); cl != ClassList::classList->end(); cl++)
    {
      std::list<BaseObject*>::iterator bo;
      for (bo = (*cl).objectList.begin(); bo != (*cl).objectList.end(); bo++)
        if ((*bo)->getName() != NULL && !strcmp((*bo)->getName(), objectName))
          return (*bo);
    }
  }
  return NULL;
}


/**
 * checks if the BaseObject* object exists.
 * @param object the Pointer to a BaseObject to check if it exists
 * @param classID if not CL_NULL it will only search through a specific type of Objects. Otherwise it will be searched everywhere.
 * @return true, if the Object Exists in the specified ClassID, false otherwise
 * @todo: speed this up!!
 */
bool ClassList::exists(const BaseObject* object, ClassID classID)
{
  if (classID != CL_NULL)
  {
    ClassList* cl = ClassList::getClassList(classID);
    if (cl != NULL)
    {
      std::list<BaseObject*>::const_iterator bo = find (cl->objectList.begin(), cl->objectList.end(), object);
      return (bo != cl->objectList.end());
    }
  }
  else
  {
    list<ClassList>::iterator cl;
    for (cl = ClassList::classList->begin(); cl != ClassList::classList->end(); cl++)
    {
      std::list<BaseObject*>::const_iterator bo = find ((*cl).objectList.begin(), (*cl).objectList.end(), object);
      if (bo != (*cl).objectList.end())
        return true;
    }
  }
  return false;
}

/**
 * prints out a string of all the types this Object matches
 * @param object a Pointer to the object to analyze
 */
void ClassList::whatIs(const BaseObject* object)
{
  list<ClassList>::iterator cl;
  for (cl = ClassList::classList->begin(); cl != ClassList::classList->end(); cl++)
    if (object->isA((*cl).classID))
  {
    PRINT(0)("=%s=-", (*cl).className);
  }
}

/**
 * converts a ClassID into a string
 * @param classID the ClassID to search for
 * @return a String containing the name of the Class, NULL if the Class was not found
 */
const char* ClassList::IDToString(ClassID classID)
{
  ClassList* cl = ClassList::getClassList(classID);
  return (cl != NULL) ? cl->className : NULL;
}

/**
 * converts a String into a ClassID
 * @param className the name of the class to search for
 * @return the ClassID. CL_NULL, if the class was not found.
 */
long ClassList::StringToID(const char* className)
{
  ClassList* cl = ClassList::getClassList(className);
  return (cl != NULL) ? cl->classID : CL_NULL;
}

/**
 * checks if this ClassList is named className
 * @param className the Name to check this ClassList's ClassName against
 * @returns true on match, false otherwise
 */
bool ClassList::operator==(const char* className)
{
  if (likely( className != NULL && this->className != NULL))
    return (!strcmp(this->className, className));
  else
    return false;
}



/**
 * Print out some very nice debug information
 * @param debugLevel the level of verbosity
 * @param classID the class that should be displayed (if CL_NULL (default) all classes will be displayed)
 */
void ClassList::debug(unsigned int debugLevel, long classID)
{
  if (debugLevel > 3)
    debugLevel = 3;
  PRINT(0)("==========================\n");
  PRINT(0)("=  CLASS_LIST (level %d)  =\n", debugLevel);
  PRINT(0)("==========================\n");
  PRINT(0)("| knows %d Classes\n|\n", ClassList::classList->size());
  char niceString[100];
  unsigned int lenCount = 0;

  list<ClassList>::iterator cl;
  for (cl = ClassList::classList->begin(); cl != ClassList::classList->end(); cl++)
  {
    if ((debugLevel >= 1 || (*cl).objectList.size() > 0 ) &&
         (classID == CL_NULL || unlikely (classID == (*cl).classID)))
    {
      lenCount = 1;
      while (pow(10, lenCount) <= (*cl).objectList.size())
        ++lenCount;
      for (int i=0; i < 30-strlen((*cl).className) - lenCount; i++)
        (niceString[i]) = ' ';
      niceString[30-strlen((*cl).className) - lenCount] = '\0';

      PRINT(0)("| CLASS %s:%s %d\n", (*cl).className, niceString, (*cl).objectList.size());

      if (debugLevel >=2 && (*cl).objectList.size() > 0)
      {
        PRINT(0)("|  Listing Instances:\n");
        list<BaseObject*>::const_iterator bo;
        for (bo = (*cl).objectList.begin(); bo != (*cl).objectList.end(); bo++)
        {
          PRINT(0)("|   (class %s): NAME(%s)->%p ", (*bo)->getClassName(), (*bo)->getName(), (*bo));
          if (debugLevel == 3)
            ClassList::whatIs(*bo);
          PRINT(0)("\n");
        }
      }
    }
  }
  PRINT(0)("=======================CL=\n");
}

/**
 * Print out some very nice debug information
 * @param debugLevel the level of verbosity
 * @param className the class that should be displayed.
 * @see ClassList::debug
 */
void ClassList::debugS(const char* className, unsigned int debugLevel)
{
  ClassList::debug(debugLevel, ClassList::StringToID(className));
}