/*
   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_LOADING

#include "util/loading/load_param.h"
#include "load_param_class_description.h"
#include "compiler.h"
#include "debug.h"
/**
 * @brief Constructs a new LoadParameter
 * @param root the XML-element to load this Parameter from
 * @param paramName the Parameter to load
 * @param object the BaseObject, to load this parameter on to (will be cast to executor's Parameter)
 * @param inLoadCycle If we are in a LoadCycle (loading differs.).
 */
LoadParamBase::LoadParamBase(const TiXmlElement* root, const std::string& paramName, bool inLoadCycle)
    :  paramName(paramName), inLoadCycle(inLoadCycle)
{
  // determin the LoadString.
  if (likely(!inLoadCycle))
    this->loadElem = grabParameterElement(root, paramName);
  else if (paramName == root->Value())
    this->loadElem = (TiXmlElement*)root->FirstChild();
  else
    this->loadElem = NULL;
}


/**
 * @param descriptionText The text to set as a description for this Parameter
 * @returns a pointer to itself.
 */
void LoadParamBase::describe(const std::string& descriptionText)
{
  /// TODO REIMPLEMENT
  /*  if (LoadParamClassDescription::parametersDescription && this->paramDesc && this->paramDesc->getDescription().empty())
  {
    this->paramDesc->setDescription(descriptionText);
  }*/
}





//////////////////////
// HELPER FUNCTIONS //
//////////////////////
/**
 * @param root: The XML-element to grab a parameter from
 * @param parameterName: the parameter to grab
 * @returns the Value of the parameter if found, NULL otherwise
*/
std::string grabParameter(const TiXmlElement* root, const std::string& parameterName)
{
  const TiXmlElement* element;
  const TiXmlNode* node;

  if (root == NULL)
    return "";

  element = root->FirstChildElement( parameterName);
  if( element == NULL) return "";

  node = element->FirstChild();
  while( node != NULL)
  {
    if( node->ToText()) return node->Value();
    node = node->NextSibling();
  }
  return "";
}

/**
 * @param root: The XML-element to grab a parameter from
 * @param parameterName: the parameter to grab
 * @returns the Element of the parameter if found, NULL otherwise
 */
const TiXmlElement* grabParameterElement(const TiXmlElement* root, const std::string& parameterName)
{
  const TiXmlElement* element;
  const TiXmlNode* node;

  if (root == NULL)
    return NULL;

  element = root->FirstChildElement( parameterName);
  if( element == NULL) return NULL;

  node = element->FirstChild();
  while( node != NULL)
  {
    if( node->ToText()) return (TiXmlElement*)node;
    node = node->NextSibling();
  }
  return NULL;
}