/*
 *   ORXONOX - the hottest 3D action shooter ever to exist
 *
 *
 *   License notice:
 *
 *   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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 *
 *   Author:
 *     Nicolas Perrenoud <nicolape@ee.ethz.ch>
 *   Co-authors:
 *      ...
 *
 */

// #include <string>
// #include <vector>
// #include <iostream>
#include <algorithm>
#include <iterator>

#include <OgreOverlayManager.h>

#include "LevelLoader.h"
// #include "tinyxml/tinyxml.h"
#include "orxonox/core/CoreIncludes.h"
#include "orxonox/core/Error.h"
#include "orxonox/objects/BaseObject.h"
#include "audio/AudioManager.h"
#include "orxonox/Orxonox.h"

using namespace std;

namespace loader
{

LevelLoader::LevelLoader(string file, string path)
{
  valid_ = false;

  // Load XML level file
  path.append("/");
  path.append(file);

  // Open xml file
  doc.LoadFile(path);

  // Check if file was loaded
  if (doc.LoadFile())
  {
    TiXmlHandle hDoc(&doc);
    TiXmlHandle hRoot(0);
    TiXmlElement* pElem;

    // Check for root element
    pElem = hDoc.FirstChildElement("orxonoxworld").Element();
    if (pElem)
    {
      // Set root element
      hRoot = TiXmlHandle(pElem);
      rootElement = hRoot.Element();

      // Set level description
      pElem = hRoot.FirstChild("description").Element();
      if (pElem)
      {
        description_ = pElem->GetText();
      }

      // Set level name
      name_ = rootElement->Attribute("name");
      image_ = rootElement->Attribute("image");

      valid_ = true;
    }
    else
    {
      orxonox::Error("Level file has no valid root node");
    }
  }
  else
  {
    orxonox::Error("Could not load level file ");
  }
}

  void LevelLoader::loadLevel()
  {
    if (valid_)
    {
      TiXmlElement* loadElem;
      TiXmlElement* audioElem;
      TiXmlElement* worldElem;
      TiXmlElement* tElem;
      TiXmlNode* tNode;

      Ogre::OverlayManager& omgr = Ogre::OverlayManager::getSingleton();
      Ogre::Overlay* mLoadOverlay; // FIXME: mey be uninitialized

      // Set loading screen
      loadElem = rootElement->FirstChildElement("loading");
      if (loadElem)
      {
        // Set background
        tElem = loadElem->FirstChildElement("background");
        if (tElem)
        {
          loadingBackgroundColor_ = tElem->Attribute("color");
          loadingBackgroundImage_ = tElem->Attribute("image");
        }
        // Set bar
        tElem = loadElem->FirstChildElement("bar");
        if (tElem)
        {
          loadingBarImage_ = tElem->Attribute("image");;
          loadingBarTop_ = tElem->Attribute("top");
          loadingBarLeft_ = tElem->Attribute("left");
          loadingBarWidth_ = tElem->Attribute("width");
          loadingBarHeight_ = tElem->Attribute("height");
        }


        mLoadOverlay = (Ogre::Overlay*)omgr.getByName("Orxonox/LoadingScreenSample");
        mLoadOverlay->show();

        COUT(0) << "\n\n\nThis is Orxonox\nthe hottest 3D action shooter ever to exist\n\n\n";
        COUT(0) << "Level: " << name() << "\nDescription:" << description() << "\nImage:"<<image()<<"\n\n\n";
        COUT(4) << "Backgroundcolor: " << loadingBackgroundColor_ << "\nBackgroundimage:" << loadingBackgroundImage_ << "\n\n\n";

      }

      // Load audio
      audio::AudioManager* auMan = orxonox::Orxonox::getSingleton()->getAudioManagerPointer();
      audioElem = rootElement->FirstChildElement("audio");

      if (audioElem)
      {
        audioElem = audioElem->FirstChildElement("ambient");
        if (audioElem)
        {
          tNode = 0;
          //FIXME something is wrong, probably missing ==
          while( tNode = audioElem->IterateChildren( tNode ) )
          {
            if (tNode->Type() == TiXmlNode::ELEMENT)
            {

              tElem = tNode->ToElement();
              std::string elemVal = tElem->Value();
              if (elemVal == "ogg")
              {
        COUT(0) << "Adding sound "<< tElem->Attribute("src") << "\n\n\n";

                auMan->ambientAdd(tElem->Attribute("src"));
              }
            }
          }
          auMan->ambientStart();
        }
      }

      // Load world
      worldElem = rootElement->FirstChildElement("world");
      if (worldElem)
      {
        tNode = 0;
        //FIXME something is wrong, probably missing ==
        while (tNode = worldElem->IterateChildren(tNode))
        {
          if (tNode->Type() == TiXmlNode::ELEMENT)
          {
            tElem = tNode->ToElement();
            orxonox::Identifier* id = ID(tElem->Value());
            if (id)
            {
                          orxonox::BaseObject* obj = id->fabricate();
                          obj->loadParams(tElem);
            }
            else
            {
                COUT(2) << "Warning: '"<< tElem->Value() <<"' is not a valid classname.\n";
            }
          }
        }
      }

      if (loadElem)
      {
         mLoadOverlay->hide();
      }


      COUT(0) << "Loading finished!\n\n\n\n\n";
    }
  }

  LevelLoader::~LevelLoader()
  {

  }



}