/*
 *   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 3 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, see <http://www.gnu.org/licenses/>.
 *
 *
 *   Author:
 *      Reto Grieder
 *   Co-authors:
 *      ...
 *
 */

#include "OgrePlatform.h"
#include "OgreRoot.h"
#include "OgreRenderWindow.h"
#include "OgreString.h"
#include "OgreConfigFile.h"

#if OGRE_PLATFORM == OGRE_PLATFORM_APPLE
  #include <CoreFoundation/CoreFoundation.h>
#endif

#include "ogre_control.h"


namespace orxonox {
  using namespace Ogre;

  /**
  * Ogre control class.
  * This is merely a convenient way to handle Ogre. It only holds the Root
  * object and the render Window. These are the objects, that are independant
  * of the game state (playing, menu browsing, loading, etc.).
  * This class could easily be merged into the Orxnox class.
  */


  /**
  * Provide support for mac users.
  */
  #if OGRE_PLATFORM == OGRE_PLATFORM_APPLE
  // This function will locate the path to our application on OS X,
  // unlike windows you can not rely on the curent working directory
  // for locating your configuration files and resources.
  std::string macBundlePath()
  {
	  char path[1024];
	  CFBundleRef mainBundle = CFBundleGetMainBundle();
	  assert(mainBundle);

	  CFURLRef mainBundleURL = CFBundleCopyBundleURL(mainBundle);
	  assert(mainBundleURL);

	  CFStringRef cfStringRef =
          CFURLCopyFileSystemPath( mainBundleURL, kCFURLPOSIXPathStyle);
	  assert(cfStringRef);

	  CFStringGetCString(cfStringRef, path, 1024, kCFStringEncodingASCII);

	  CFRelease(mainBundleURL);
	  CFRelease(cfStringRef);

	  return std::string(path);
  }
  #endif


  /**
  * Constructor that determines the resource path platform dependant.
  */
  OgreControl::OgreControl() : root_(0)
  {
	  // Provide a nice cross platform solution for locating the configuration
	  // files. On windows files are searched for in the current working
    // directory, on OS X however you must provide the full path, the helper
    // function macBundlePath does this for us.
  #if OGRE_PLATFORM == OGRE_PLATFORM_APPLE
	  resourcePath_ = macBundlePath() + "/Contents/Resources/";
  #else
	  resourcePath_ = "";
  #endif
  }


  /**
  * Standard Destructor.
  */
  OgreControl::~OgreControl()
  {
	  if (root_)
		  delete root_;
  }


  /* Sets up Ogre.
  * First, the Root object is being created, then the resources are defined
  * (not loaded!). And last but not least, the render settings (like resolution
  * or AA level) are prompted to the user.
  */
  bool OgreControl::initialise(void)
  {
	  String pluginsPath;
	  // only use plugins.cfg if not static
  #ifndef OGRE_STATIC_LIB
	  pluginsPath = resourcePath_ + "plugins.cfg";
  #endif

	  root_ = new Root(pluginsPath, 
		  resourcePath_ + "ogre.cfg", resourcePath_ + "Ogre.log");

	  setupResources();

	  if (!configure())
		  return false;

	  return true;
  }


  /**
  * Defines the source of the resources.
  */
  void OgreControl::setupResources(void)
  {
	  // Load resource paths from config file
	  ConfigFile cf;
	  cf.load(resourcePath_ + "resources.cfg");

	  // Go through all sections & settings in the file
	  ConfigFile::SectionIterator seci = cf.getSectionIterator();

	  String secName, typeName, archName;
	  while (seci.hasMoreElements())
	  {
		  secName = seci.peekNextKey();
		  ConfigFile::SettingsMultiMap *settings = seci.getNext();
		  ConfigFile::SettingsMultiMap::iterator i;
		  for (i = settings->begin(); i != settings->end(); ++i)
		  {
			  typeName = i->first;
			  archName = i->second;
  #if OGRE_PLATFORM == OGRE_PLATFORM_APPLE
			  // OS X does not set the working directory relative to the app,
			  // In order to make things portable on OS X we need to provide
			  // the loading with it's own bundle path location
			  ResourceGroupManager::getSingleton().addResourceLocation(
				  String(macBundlePath() + "/" + archName), typeName, secName);
  #else
			  ResourceGroupManager::getSingleton().addResourceLocation(
				  archName, typeName, secName);
  #endif
		  }
	  }
  }


  /**
  * Prompts a setting window for the render engine if that has not already
  * been done.
  * The method also calls the root initialiser in order to get a render window.
  */
  bool OgreControl::configure(void)
  {
	  // Show the configuration dialog and initialise the system
	  // You can skip this and use root.restoreConfig() to load configuration
	  // settings if you were sure there are valid ones saved in ogre.cfg
	  if(!root_->restoreConfig() && !root_->showConfigDialog())
		  return false;

	  // user clicked OK so initialise
	  // Here we choose to let the system create a default
    // rendering window by passing 'true'
	  root_->saveConfig();
	  window_ = root_->initialise(true);
	  return true;
  }


  /**
  * Returns the root object.
  * @return Root object.
  */
  Root* OgreControl::getRoot(void)
  {
	  return root_;
  }


  /**
  * Returns the render window.
  * @return Render window.
  */
  RenderWindow* OgreControl::getRenderWindow(void)
  {
	  return window_;
  }


  /**
  * Returns the resource path.
  * @return Resource path.
  */
  Ogre::String OgreControl::getResourcePath(void)
  {
	  return resourcePath_;
  }

}