/*
 *   ORXONOX - the hottest 3D action shooter ever to exist
 *                    > www.orxonox.net <
 *
 *
 *   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:
 *      Reto Grieder
 *   Co-authors:
 *      ...
 *
 */

/**
  @file
  @brief Implementation of the InputManager that captures all the input from OIS
         and redirects it to handlers.
 */

#include "InputManager.h"
#include "CoreIncludes.h"
#include "Debug.h"
#include "InputBuffer.h"
#include "InputHandler.h"

namespace orxonox
{
  // ###############################
  // ###    Internal Methods     ###
  // ###############################
  // ###############################

  /**
    @brief Constructor only sets member fields to initial zero values
           and registers the class in the class hierarchy.
  */
  InputManager::InputManager() :
      inputSystem_(0), keyboard_(0), mouse_(0),
      joySticksSize_(0),
      state_(IS_UNINIT), stateRequest_(IS_UNINIT),
      keyboardModifiers_(0)
  {
    RegisterObject(InputManager);
  }

  /**
    @brief The one instance of the InputManager is stored in this function.
    @return A reference to the only instance of the InputManager
  */
  InputManager& InputManager::_getSingleton()
  {
    static InputManager theOnlyInstance;
    return theOnlyInstance;
  }

  /**
    @brief Destructor only called at the end of the program, after main.
  */
  InputManager::~InputManager()
  {
    _destroy();
  }

  /**
    @brief Creates the OIS::InputMananger, the keyboard, the mouse and
           the joysticks and assigns the key bindings.
    @param windowHnd The window handle of the render window
    @param windowWidth The width of the render window
    @param windowHeight The height of the render window
  */
  bool InputManager::_initialise(const size_t windowHnd, int windowWidth, int windowHeight,
        bool createKeyboard, bool createMouse, bool createJoySticks)
  {
    if (state_ == IS_UNINIT)
    {
      CCOUT(3) << "Initialising Input System..." << std::endl;
      CCOUT(ORX_DEBUG) << "Initialising OIS components..." << std::endl;

      OIS::ParamList paramList;
      std::ostringstream windowHndStr;

      // Fill parameter list
      windowHndStr << (unsigned int)windowHnd;
      paramList.insert(std::make_pair(std::string("WINDOW"), windowHndStr.str()));

//#if defined OIS_LINUX_PLATFORM
//      paramList.insert(std::make_pair(std::string("XAutoRepeatOn"), std::string("true")));
//#endif

      try
      {
        inputSystem_ = OIS::InputManager::createInputSystem(paramList);
        CCOUT(ORX_DEBUG) << "Created OIS input system" << std::endl;
      }
      catch (OIS::Exception ex)
      {
        CCOUT(ORX_ERROR) << "Error: Failed creating an OIS input system."
            << "OIS message: \"" << ex.eText << "\"" << std::endl;
        inputSystem_ = 0;
        return false;
      }

      if (createKeyboard)
        _initialiseKeyboard();

      if (createMouse)
        _initialiseMouse();

      if (createJoySticks)
        _initialiseJoySticks();

      // Set mouse/joystick region
      setWindowExtents(windowWidth, windowHeight);

      state_ = IS_NONE;
      CCOUT(ORX_DEBUG) << "Initialising OIS components done." << std::endl;
    }
    else
    {
      CCOUT(ORX_WARNING) << "Warning: OIS compoments already initialised, skipping" << std::endl;
    }

    // InputManager holds the input buffer --> create one and add it.
    addKeyHandler(new InputBuffer(), "buffer");

    KeyBinder* binder = new KeyBinder();
    binder->loadBindings();
    addKeyHandler(binder, "keybinder");
    addMouseHandler(binder, "keybinder");
    addJoyStickHandler(binder, "keybinder");

    // Read all the key bindings and assign them
    //if (!_loadBindings())
    //  return false;

    CCOUT(ORX_DEBUG) << "Initialising complete." << std::endl;
    return true;
  }

  /**
    @brief Creates a keyboard and sets the event handler.
    @return False if keyboard stays uninitialised, true otherwise.
  */
  bool InputManager::_initialiseKeyboard()
  {
    if (keyboard_ != 0)
    {
      CCOUT(2) << "Warning: Keyboard already initialised, skipping." << std::endl;
      return true;
    }
    try
    {
      if (inputSystem_->getNumberOfDevices(OIS::OISKeyboard) > 0)
      {
        keyboard_ = (OIS::Keyboard*)inputSystem_->createInputObject(OIS::OISKeyboard, true);
        // register our listener in OIS.
        keyboard_->setEventCallback(this);
        // note: OIS will not detect keys that have already been down when the keyboard was created.
        CCOUT(ORX_DEBUG) << "Created OIS keyboard" << std::endl;
        return true;
      }
      else
      {
        CCOUT(ORX_WARNING) << "Warning: No keyboard found!" << std::endl;
        return false;
      }
    }
    catch (OIS::Exception ex)
    {
      // TODO: Test this output regarding formatting
      CCOUT(ORX_WARNING) << "Warning: Failed to create an OIS keyboard\n"
          << "OIS error message: \"" << ex.eText << "\"" << std::endl;
      keyboard_ = 0;
      return false;
    }
  }

  /**
    @brief Creates a mouse and sets the event handler.
    @return False if mouse stays uninitialised, true otherwise.
  */
  bool InputManager::_initialiseMouse()
  {
    if (mouse_ != 0)
    {
      CCOUT(2) << "Warning: Mouse already initialised, skipping." << std::endl;
      return true;
    }
    try
    {
      if (inputSystem_->getNumberOfDevices(OIS::OISMouse) > 0)
      {
        mouse_ = static_cast<OIS::Mouse*>(inputSystem_->createInputObject(OIS::OISMouse, true));
        // register our listener in OIS.
        mouse_->setEventCallback(this);
        CCOUT(ORX_DEBUG) << "Created OIS keyboard" << std::endl;
        return true;
      }
      else
      {
        CCOUT(ORX_WARNING) << "Warning: No mouse found!" << std::endl;
        return false;
      }
    }
    catch (OIS::Exception ex)
    {
      CCOUT(ORX_WARNING) << "Warning: Failed to create an OIS mouse\n"
          << "OIS error message: \"" << ex.eText << "\"" << std::endl;
      mouse_ = 0;
      return false;
    }
  }

  /**
    @brief Creates all joy sticks and sets the event handler.
    @return False joy stick stay uninitialised, true otherwise.
  */
  bool InputManager::_initialiseJoySticks()
  {
    if (joySticksSize_ > 0)
    {
      CCOUT(2) << "Warning: Joy sticks already initialised, skipping." << std::endl;
      return true;
    }
    bool success = false;
    if (inputSystem_->getNumberOfDevices(OIS::OISJoyStick) > 0)
    {
      for (int i = 0; i < inputSystem_->getNumberOfDevices(OIS::OISJoyStick); i++)
      {
        try
        {
          OIS::JoyStick* stig = static_cast<OIS::JoyStick*>(inputSystem_->createInputObject(OIS::OISJoyStick, true));
          joySticks_.push_back(stig);
          // register our listener in OIS.
          stig->setEventCallback(this);
          CCOUT(ORX_DEBUG) << "Created OIS joy stick with ID " << stig->getID() << std::endl;
          success = true;
        }
        catch (OIS::Exception ex)
        {
          CCOUT(ORX_WARNING) << "Warning: Failed to create OIS joy number" << i << "\n"
              << "OIS error message: \"" << ex.eText << "\"" << std::endl;
        }
      }
    }
    else
    {
      CCOUT(ORX_WARNING) << "Warning: Joy stick support requested, but no joy stick was found" << std::endl;
      return false;
    }
    joySticksSize_ = joySticks_.size();
    activeJoyStickHandlers_.resize(joySticksSize_);
    joyStickButtonsDown_.resize(joySticksSize_);
    return success;
  }

  /**
    @brief Destroys all the created input devices and sets the InputManager to construction state.
  */
  void InputManager::_destroy()
  {
    if (state_ != IS_UNINIT)
    {
      CCOUT(ORX_DEBUG) << "Destroying ..." << std::endl;

      if (keyHandlers_.find("buffer") != keyHandlers_.end())
        delete keyHandlers_["buffer"];

      if (keyHandlers_.find("keybinder") != keyHandlers_.end())
        delete keyHandlers_["keybinder"];

      keyHandlers_.clear();
      mouseHandlers_.clear();
      joyStickHandlers_.clear();

      _destroyKeyboard();
      _destroyMouse();
      _destroyJoySticks();

      // inputSystem_ can never be 0, or else the code is mistaken
      OIS::InputManager::destroyInputSystem(inputSystem_);
      inputSystem_ = 0;

      state_ = IS_UNINIT;
      CCOUT(ORX_DEBUG) << "Destroying done." << std::endl;
    }
  }

  /**
    @brief Destroys the keyboard and sets it to 0.
  */
  void InputManager::_destroyKeyboard()
  {
    if (keyboard_)
      // inputSystem_ can never be 0, or else the code is mistaken
      inputSystem_->destroyInputObject(keyboard_);
    keyboard_ = 0;
    activeKeyHandlers_.clear();
    keysDown_.clear();
    CCOUT(ORX_DEBUG) << "Keyboard destroyed." << std::endl;
  }

  /**
    @brief Destroys the mouse and sets it to 0.
  */
  void InputManager::_destroyMouse()
  {
    if (mouse_)
      // inputSystem_ can never be 0, or else the code is mistaken
      inputSystem_->destroyInputObject(mouse_);
    mouse_ = 0;
    activeMouseHandlers_.clear();
    mouseButtonsDown_.clear();
    CCOUT(ORX_DEBUG) << "Mouse destroyed." << std::endl;
  }

  /**
    @brief Destroys all the joy sticks and resizes the lists to 0.
  */
  void InputManager::_destroyJoySticks()
  {
    if (joySticksSize_ > 0)
    {
      // note: inputSystem_ can never be 0, or else the code is mistaken
      for (unsigned int i = 0; i < joySticksSize_; i++)
        if (joySticks_[i] != 0)
          inputSystem_->destroyInputObject(joySticks_[i]);

      joySticks_.clear();
      joySticksSize_ = 0;
      activeJoyStickHandlers_.clear();
      joyStickButtonsDown_.clear();
    }
    CCOUT(ORX_DEBUG) << "Joy sticks destroyed." << std::endl;
  }


  // #################################
  // ### Private Interface Methods ###
  // #################################
  // #################################

  /**
    @brief Updates the InputManager. Tick is called by Orxonox.
    @param dt Delta time
  */
  void InputManager::tick(float dt)
  {
    if (state_ == IS_UNINIT)
      return;

    // reset the game if it has changed
    if (state_ != stateRequest_)
    {
      if (stateRequest_ != IS_CUSTOM)
      {
        activeKeyHandlers_.clear();
        activeMouseHandlers_.clear();
        for (unsigned int i = 0; i < joySticksSize_; i++)
          activeJoyStickHandlers_[i].clear();

        switch (stateRequest_)
        {
        case IS_NORMAL:
          // normal play mode
          // note: we assume that the handlers exist since otherwise, something's wrong anyway.
          activeKeyHandlers_.push_back(keyHandlers_["keybinder"]);
          activeMouseHandlers_.push_back(mouseHandlers_["keybinder"]);
          activeMouseHandlers_.push_back(mouseHandlers_["SpaceShip"]);
          for (unsigned int i = 0; i < joySticksSize_; i++)
            activeJoyStickHandlers_[i].push_back(joyStickHandlers_["keybinder"]);
          break;

        case IS_GUI:
          // FIXME: do stuff
          break;

        case IS_CONSOLE:
          activeMouseHandlers_.push_back(mouseHandlers_["keybinder"]);
          activeMouseHandlers_.push_back(mouseHandlers_["SpaceShip"]);
          for (unsigned int i = 0; i < joySticksSize_; i++)
            activeJoyStickHandlers_[i].push_back(joyStickHandlers_["keybinder"]);

          activeKeyHandlers_.push_back(keyHandlers_["buffer"]);
          break;

        default:
          break;
        }
        state_ = stateRequest_;
      }
    }

    // Capture all the input. This calls the event handlers in InputManager.
    if (mouse_)
      mouse_->capture();
    if (keyboard_)
      keyboard_->capture();
    for (unsigned  int i = 0; i < joySticksSize_; i++)
      joySticks_[i]->capture();


    // call all the handlers for the held key events
    for (unsigned int iKey = 0; iKey < keysDown_.size(); iKey++)
      for (unsigned int iHandler = 0; iHandler < activeKeyHandlers_.size(); iHandler++)
        activeKeyHandlers_[iHandler]->keyHeld(KeyEvent(keysDown_[iKey], keyboardModifiers_));

    // call all the handlers for the held mouse button events
    for (unsigned int iButton = 0; iButton < mouseButtonsDown_.size(); iButton++)
      for (unsigned int iHandler = 0; iHandler < activeMouseHandlers_.size(); iHandler++)
        activeMouseHandlers_[iHandler]->mouseButtonHeld(mouse_->getMouseState(), mouseButtonsDown_[iButton]);

    // call all the handlers for the held joy stick button events
    for (unsigned int iJoyStick  = 0; iJoyStick < joySticksSize_; iJoyStick++)
      for (unsigned int iButton   = 0; iButton   < joyStickButtonsDown_[iJoyStick].size(); iButton++)
        for (unsigned int iHandler = 0; iHandler  < activeJoyStickHandlers_[iJoyStick].size(); iHandler++)
          activeJoyStickHandlers_[iJoyStick][iHandler]->joyStickButtonHeld(
              JoyStickState(joySticks_[iJoyStick]->getJoyStickState(), iJoyStick), joyStickButtonsDown_[iJoyStick][iButton]);
  }

  // ###### Key Events ######

  /**
    @brief Event handler for the keyPressed Event.
    @param e Event information
  */
  bool InputManager::keyPressed(const OIS::KeyEvent &e)
  {
    // check whether the key already is in the list (can happen when focus was lost)
    unsigned int iKey = 0;
    while (iKey < keysDown_.size() && keysDown_[iKey].key != (KeyCode::Enum)e.key)
      iKey++;
    if (iKey == keysDown_.size())
      keysDown_.push_back(Key(e));

    // update modifiers
    if(e.key == OIS::KC_RMENU    || e.key == OIS::KC_LMENU)
      keyboardModifiers_ |= KeyboardModifier::Alt;   // alt key
    if(e.key == OIS::KC_RCONTROL || e.key == OIS::KC_LCONTROL)
      keyboardModifiers_ |= KeyboardModifier::Ctrl;  // ctrl key
    if(e.key == OIS::KC_RSHIFT   || e.key == OIS::KC_LSHIFT)
      keyboardModifiers_ |= KeyboardModifier::Shift; // shift key

    for (unsigned int i = 0; i < activeKeyHandlers_.size(); i++)
      activeKeyHandlers_[i]->keyPressed(KeyEvent(e, keyboardModifiers_));

    return true;
  }

  /**
    @brief Event handler for the keyReleased Event.
    @param e Event information
  */
  bool InputManager::keyReleased(const OIS::KeyEvent &e)
  {
    // remove the key from the keysDown_ list
    for (unsigned int iKey = 0; iKey < keysDown_.size(); iKey++)
    {
      if (keysDown_[iKey].key == (KeyCode::Enum)e.key)
      {
        keysDown_.erase(keysDown_.begin() + iKey);
        break;
      }
    }

    // update modifiers
    if(e.key == OIS::KC_RMENU    || e.key == OIS::KC_LMENU)
      keyboardModifiers_ &= ~KeyboardModifier::Alt;   // alt key
    if(e.key == OIS::KC_RCONTROL || e.key == OIS::KC_LCONTROL)
      keyboardModifiers_ &= ~KeyboardModifier::Ctrl;  // ctrl key
    if(e.key == OIS::KC_RSHIFT   || e.key == OIS::KC_LSHIFT)
      keyboardModifiers_ &= ~KeyboardModifier::Shift; // shift key

    for (unsigned int i = 0; i < activeKeyHandlers_.size(); i++)
      activeKeyHandlers_[i]->keyReleased(KeyEvent(e, keyboardModifiers_));

    return true;
  }


  // ###### Mouse Events ######

  /**
    @brief Event handler for the mouseMoved Event.
    @param e Event information
  */
  bool InputManager::mouseMoved(const OIS::MouseEvent &e)
  {
    // check for actual moved event
    if (e.state.X.rel != 0 || e.state.Y.rel != 0)
    {
      for (unsigned int i = 0; i < activeMouseHandlers_.size(); i++)
        activeMouseHandlers_[i]->mouseMoved(e.state);
    }

    // check for mouse scrolled event
    if (e.state.Z.rel != 0)
    {
      for (unsigned int i = 0; i < activeMouseHandlers_.size(); i++)
        activeMouseHandlers_[i]->mouseScrolled(e.state);
    }

    return true;
  }

  /**
    @brief Event handler for the mousePressed Event.
    @param e Event information
    @param id The ID of the mouse button
  */
  bool InputManager::mousePressed(const OIS::MouseEvent &e, OIS::MouseButtonID id)
  {
    // check whether the button already is in the list (can happen when focus was lost)
    unsigned int iButton = 0;
    while (iButton < mouseButtonsDown_.size() && mouseButtonsDown_[iButton] != (MouseButton::Enum)id)
      iButton++;
    if (iButton == mouseButtonsDown_.size())
      mouseButtonsDown_.push_back((MouseButton::Enum)id);

    for (unsigned int i = 0; i < activeMouseHandlers_.size(); i++)
      activeMouseHandlers_[i]->mouseButtonPressed(e.state, (MouseButton::Enum)id);

    return true;
  }

  /**
    @brief Event handler for the mouseReleased Event.
    @param e Event information
    @param id The ID of the mouse button
  */
  bool InputManager::mouseReleased(const OIS::MouseEvent &e, OIS::MouseButtonID id)
  {
    // remove the button from the keysDown_ list
    for (unsigned int iButton = 0; iButton < mouseButtonsDown_.size(); iButton++)
    {
      if (mouseButtonsDown_[iButton] == (MouseButton::Enum)id)
      {
        mouseButtonsDown_.erase(mouseButtonsDown_.begin() + iButton);
        break;
      }
    }

    for (unsigned int i = 0; i < activeMouseHandlers_.size(); i++)
      activeMouseHandlers_[i]->mouseButtonReleased(e.state, (MouseButton::Enum)id);

    return true;
  }


  // ###### Joy Stick Events ######

  bool InputManager::buttonPressed(const OIS::JoyStickEvent &arg, int button)
  {
    // use the device to identify which one called the method
    OIS::JoyStick* joyStick = (OIS::JoyStick*)arg.device;
    unsigned int iJoyStick = 0;
    while (joySticks_[iJoyStick] != joyStick)
      iJoyStick++;

    // check whether the button already is in the list (can happen when focus was lost)
    std::vector<int> buttonsDown = joyStickButtonsDown_[iJoyStick];
    unsigned int iButton = 0;
    while (iButton < buttonsDown.size() && buttonsDown[iButton] != button)
      iButton++;
    if (iButton == buttonsDown.size())
      buttonsDown.push_back(button);

    for (unsigned int iHandler = 0; iHandler < activeJoyStickHandlers_[iJoyStick].size(); iHandler++)
      activeJoyStickHandlers_[iJoyStick][iHandler]->joyStickButtonPressed(JoyStickState(arg.state, iJoyStick), button);

    return true;
  }

  bool InputManager::buttonReleased(const OIS::JoyStickEvent &arg, int button)
  {
    // use the device to identify which one called the method
    OIS::JoyStick* joyStick = (OIS::JoyStick*)arg.device;
    unsigned int iJoyStick = 0;
    while (joySticks_[iJoyStick] != joyStick)
      iJoyStick++;

    // remove the button from the joyStickButtonsDown_ list
    std::vector<int> buttonsDown = joyStickButtonsDown_[iJoyStick];
    for (unsigned int iButton = 0; iButton < buttonsDown.size(); iButton++)
    {
      if (buttonsDown[iButton] == button)
      {
        buttonsDown.erase(buttonsDown.begin() + iButton);
        break;
      }
    }

    for (unsigned int iHandler = 0; iHandler < activeJoyStickHandlers_[iJoyStick].size(); iHandler++)
      activeJoyStickHandlers_[iJoyStick][iHandler]->joyStickButtonReleased(JoyStickState(arg.state, iJoyStick), button);

    return true;
  }

  bool InputManager::axisMoved(const OIS::JoyStickEvent &arg, int axis)
  {
    // use the device to identify which one called the method
    OIS::JoyStick* joyStick = (OIS::JoyStick*)arg.device;
    unsigned int iJoyStick = 0;
    while (joySticks_[iJoyStick] != joyStick)
      iJoyStick++;

    for (unsigned int iHandler = 0; iHandler < activeJoyStickHandlers_[iJoyStick].size(); iHandler++)
      activeJoyStickHandlers_[iJoyStick][iHandler]->joyStickAxisMoved(JoyStickState(arg.state, iJoyStick), axis);

    return true;
  }

  bool InputManager::sliderMoved(const OIS::JoyStickEvent &arg, int id)
  {
    // use the device to identify which one called the method
    OIS::JoyStick* joyStick = (OIS::JoyStick*)arg.device;
    unsigned int iJoyStick = 0;
    while (joySticks_[iJoyStick] != joyStick)
      iJoyStick++;

    for (unsigned int iHandler = 0; iHandler < activeJoyStickHandlers_[iJoyStick].size(); iHandler++)
      activeJoyStickHandlers_[iJoyStick][iHandler]->joyStickSliderMoved(JoyStickState(arg.state, iJoyStick), id);

    return true;
  }

  bool InputManager::povMoved(const OIS::JoyStickEvent &arg, int id)
  {
    // use the device to identify which one called the method
    OIS::JoyStick* joyStick = (OIS::JoyStick*)arg.device;
    unsigned int iJoyStick = 0;
    while (joySticks_[iJoyStick] != joyStick)
      iJoyStick++;

    for (unsigned int iHandler = 0; iHandler < activeJoyStickHandlers_[iJoyStick].size(); iHandler++)
      activeJoyStickHandlers_[iJoyStick][iHandler]->joyStickPovMoved(JoyStickState(arg.state, iJoyStick), id);

    return true;
  }

  bool InputManager::vector3Moved(const OIS::JoyStickEvent &arg, int id)
  {
    // use the device to identify which one called the method
    OIS::JoyStick* joyStick = (OIS::JoyStick*)arg.device;
    unsigned int iJoyStick = 0;
    while (joySticks_[iJoyStick] != joyStick)
      iJoyStick++;

    for (unsigned int iHandler = 0; iHandler < activeJoyStickHandlers_[iJoyStick].size(); iHandler++)
      activeJoyStickHandlers_[iJoyStick][iHandler]->joyStickVector3Moved(JoyStickState(arg.state, iJoyStick), id);

    return true;
  }


  // ################################
  // ### Static Interface Methods ###
  // ################################
  // ################################

  bool InputManager::initialise(const size_t windowHnd, int windowWidth, int windowHeight,
    bool createKeyboard, bool createMouse, bool createJoySticks)
  {
    return _getSingleton()._initialise(windowHnd, windowWidth, windowHeight,
          createKeyboard, createMouse, createJoySticks);
  }

  bool InputManager::initialiseKeyboard()
  {
    return _getSingleton()._initialiseKeyboard();
  }

  bool InputManager::initialiseMouse()
  {
    return _getSingleton()._initialiseMouse();
  }

  bool InputManager::initialiseJoySticks()
  {
    return _getSingleton()._initialiseJoySticks();
  }

  int InputManager::numberOfKeyboards()
  {
    if (_getSingleton().keyboard_ != 0)
      return 1;
    else
      return 0;
  }

  int InputManager::numberOfMice()
  {
    if (_getSingleton().mouse_ != 0)
      return 1;
    else
      return 0;
  }

  int InputManager::numberOfJoySticks()
  {
    return _getSingleton().joySticksSize_;
  }

  bool InputManager::isKeyDown(KeyCode::Enum key)
  {
    if (_getSingleton().keyboard_)
      return _getSingleton().keyboard_->isKeyDown((OIS::KeyCode)key);
    else
      return false;
  }

  bool InputManager::isModifierDown(KeyboardModifier::Enum modifier)
  {
    if (_getSingleton().keyboard_)
      return isModifierDown(modifier);
    else
      return false;
  }

  const MouseState InputManager::getMouseState()
  {
    if (_getSingleton().mouse_)
      return _getSingleton().mouse_->getMouseState();
    else
      return MouseState();
  }

  const JoyStickState InputManager::getJoyStickState(unsigned int ID)
  {
    if (ID < _getSingleton().joySticksSize_)
      return JoyStickState(_getSingleton().joySticks_[ID]->getJoyStickState(), ID);
    else
      return JoyStickState();
  }


  void InputManager::destroy()
  {
    _getSingleton()._destroy();
  }

  void InputManager::destroyKeyboard()
  {
    return _getSingleton()._destroyKeyboard();
  }

  void InputManager::destroyMouse()
  {
    return _getSingleton()._destroyMouse();
  }

  void InputManager::destroyJoySticks()
  {
    return _getSingleton()._destroyJoySticks();
  }


  /**
    @brief Adjusts the mouse window metrics.
    This method has to be called every time the size of the window changes.
    @param width The new width of the render window
    @param height the new height of the render window
  */
  void InputManager::setWindowExtents(const int width, const int height)
  {
    if (_getSingleton().mouse_)
    {
      // Set mouse region (if window resizes, we should alter this to reflect as well)
      const OIS::MouseState &mouseState = _getSingleton().mouse_->getMouseState();
      mouseState.width  = width;
      mouseState.height = height;
    }
  }

  /**
    @brief Sets the input mode to either GUI, inGame or Buffer
    @param mode The new input mode
    @remark Only has an affect if the mode actually changes
  */
  void InputManager::setInputState(const InputState state)
  {
    _getSingleton().stateRequest_ = state;
  }

  /**
    @brief Returns the current input handling method
    @return The current input mode.
  */
  InputManager::InputState InputManager::getInputState()
  {
    return _getSingleton().state_;
  }


  // ###### KeyHandler ######

  /**
    @brief Adds a new key handler.
    @param handler Pointer to the handler object.
    @param name Unique name of the handler.
    @return True if added, false if name already existed.
  */
  bool InputManager::addKeyHandler(KeyHandler* handler, const std::string& name)
  {
    if (_getSingleton().keyHandlers_.find(name) == _getSingleton().keyHandlers_.end())
    {
      _getSingleton().keyHandlers_[name] = handler;
      return true;
    }
    else
      return false;
  }

  /**
    @brief Removes a Key handler from the list.
    @param name Unique name of the handler.
    @return True if removal was successful, false if name was not found.
  */
  bool InputManager::removeKeyHandler(const std::string &name)
  {
    disableKeyHandler(name);
    std::map<std::string, KeyHandler*>::iterator it = _getSingleton().keyHandlers_.find(name);
    if (it != _getSingleton().keyHandlers_.end())
    {
      _getSingleton().keyHandlers_.erase(it);
      return true;
    }
    else
      return false;
  }

  /**
    @brief Returns the pointer to a handler.
    @param name Unique name of the handler.
    @return Pointer to the instance, 0 if name was not found.
  */
  KeyHandler* InputManager::getKeyHandler(const std::string& name)
  {
    std::map<std::string, KeyHandler*>::iterator it = _getSingleton().keyHandlers_.find(name);
    if (it != _getSingleton().keyHandlers_.end())
    {
      return (*it).second;
    }
    else
      return 0;
  }

  /**
    @brief Enables a specific key handler that has already been added.
    @param name Unique name of the handler.
    @return False if name was not found, true otherwise.
  */
  bool InputManager::enableKeyHandler(const std::string& name)
  {
    // get pointer from the map with all stored handlers
    std::map<std::string, KeyHandler*>::const_iterator mapIt = _getSingleton().keyHandlers_.find(name);
    if (mapIt == _getSingleton().keyHandlers_.end())
      return false;
    // see whether the handler already is in the list
    for (std::vector<KeyHandler*>::iterator it = _getSingleton().activeKeyHandlers_.begin();
          it != _getSingleton().activeKeyHandlers_.end(); it++)
    {
      if ((*it) == (*mapIt).second)
      {
        _getSingleton().stateRequest_ = IS_CUSTOM;
        return true;
      }
    }
    _getSingleton().activeKeyHandlers_.push_back((*mapIt).second);
    _getSingleton().stateRequest_ = IS_CUSTOM;
    return true;
  }

  /**
    @brief Disables a specific key handler.
    @param name Unique name of the handler.
    @return False if name was not found, true otherwise.
  */
  bool InputManager::disableKeyHandler(const std::string &name)
  {
    // get pointer from the map with all stored handlers
    std::map<std::string, KeyHandler*>::const_iterator mapIt = _getSingleton().keyHandlers_.find(name);
    if (mapIt == _getSingleton().keyHandlers_.end())
      return false;
    // look for the handler in the list
    for (std::vector<KeyHandler*>::iterator it = _getSingleton().activeKeyHandlers_.begin();
          it != _getSingleton().activeKeyHandlers_.end(); it++)
    {
      if ((*it) == (*mapIt).second)
      {
        _getSingleton().activeKeyHandlers_.erase(it);
        _getSingleton().stateRequest_ = IS_CUSTOM;
        return true;
      }
    }
    _getSingleton().stateRequest_ = IS_CUSTOM;
    return true;
  }

  /**
    @brief Checks whether a key handler is active
    @param name Unique name of the handler.
    @return False if key handler is not active or doesn't exist, true otherwise.
  */
  bool InputManager::isKeyHandlerActive(const std::string& name)
  {
    // get pointer from the map with all stored handlers
    std::map<std::string, KeyHandler*>::const_iterator mapIt = _getSingleton().keyHandlers_.find(name);
    if (mapIt == _getSingleton().keyHandlers_.end())
      return false;
    // see whether the handler already is in the list
    for (std::vector<KeyHandler*>::iterator it = _getSingleton().activeKeyHandlers_.begin();
          it != _getSingleton().activeKeyHandlers_.end(); it++)
    {
      if ((*it) == (*mapIt).second)
        return true;
    }
    return false;
  }


  // ###### MouseHandler ######
  /**
    @brief Adds a new mouse handler.
    @param handler Pointer to the handler object.
    @param name Unique name of the handler.
    @return True if added, false if name already existed.
  */
  bool InputManager::addMouseHandler(MouseHandler* handler, const std::string& name)
  {
    if (_getSingleton().mouseHandlers_.find(name) == _getSingleton().mouseHandlers_.end())
    {
      _getSingleton().mouseHandlers_[name] = handler;
      return true;
    }
    else
      return false;
  }

  /**
    @brief Removes a Mouse handler from the list.
    @param name Unique name of the handler.
    @return True if removal was successful, false if name was not found.
  */
  bool InputManager::removeMouseHandler(const std::string &name)
  {
    disableMouseHandler(name);
    std::map<std::string, MouseHandler*>::iterator it = _getSingleton().mouseHandlers_.find(name);
    if (it != _getSingleton().mouseHandlers_.end())
    {
      _getSingleton().mouseHandlers_.erase(it);
      return true;
    }
    else
      return false;
  }

  /**
    @brief Returns the pointer to a handler.
    @param name Unique name of the handler.
    @return Pointer to the instance, 0 if name was not found.
  */
  MouseHandler* InputManager::getMouseHandler(const std::string& name)
  {
    std::map<std::string, MouseHandler*>::iterator it = _getSingleton().mouseHandlers_.find(name);
    if (it != _getSingleton().mouseHandlers_.end())
    {
      return (*it).second;
    }
    else
      return 0;
  }

  /**
    @brief Enables a specific mouse handler that has already been added.
    @param name Unique name of the handler.
    @return False if name was not found, true otherwise.
  */
  bool InputManager::enableMouseHandler(const std::string& name)
  {
    // get pointer from the map with all stored handlers
    std::map<std::string, MouseHandler*>::const_iterator mapIt = _getSingleton().mouseHandlers_.find(name);
    if (mapIt == _getSingleton().mouseHandlers_.end())
      return false;
    // see whether the handler already is in the list
    for (std::vector<MouseHandler*>::iterator it = _getSingleton().activeMouseHandlers_.begin();
          it != _getSingleton().activeMouseHandlers_.end(); it++)
    {
      if ((*it) == (*mapIt).second)
      {
        _getSingleton().stateRequest_ = IS_CUSTOM;
        return true;
      }
    }
    _getSingleton().activeMouseHandlers_.push_back((*mapIt).second);
    _getSingleton().stateRequest_ = IS_CUSTOM;
    return true;
  }

  /**
    @brief Disables a specific mouse handler.
    @param name Unique name of the handler.
    @return False if name was not found, true otherwise.
  */
  bool InputManager::disableMouseHandler(const std::string &name)
  {
    // get pointer from the map with all stored handlers
    std::map<std::string, MouseHandler*>::const_iterator mapIt = _getSingleton().mouseHandlers_.find(name);
    if (mapIt == _getSingleton().mouseHandlers_.end())
      return false;
    // look for the handler in the list
    for (std::vector<MouseHandler*>::iterator it = _getSingleton().activeMouseHandlers_.begin();
          it != _getSingleton().activeMouseHandlers_.end(); it++)
    {
      if ((*it) == (*mapIt).second)
      {
        _getSingleton().activeMouseHandlers_.erase(it);
        _getSingleton().stateRequest_ = IS_CUSTOM;
        return true;
      }
    }
    _getSingleton().stateRequest_ = IS_CUSTOM;
    return true;
  }

  /**
    @brief Checks whether a mouse handler is active
    @param name Unique name of the handler.
    @return False if key handler is not active or doesn't exist, true otherwise.
  */
  bool InputManager::isMouseHandlerActive(const std::string& name)
  {
    // get pointer from the map with all stored handlers
    std::map<std::string, MouseHandler*>::const_iterator mapIt = _getSingleton().mouseHandlers_.find(name);
    if (mapIt == _getSingleton().mouseHandlers_.end())
      return false;
    // see whether the handler already is in the list
    for (std::vector<MouseHandler*>::iterator it = _getSingleton().activeMouseHandlers_.begin();
          it != _getSingleton().activeMouseHandlers_.end(); it++)
    {
      if ((*it) == (*mapIt).second)
        return true;
    }
    return false;
  }


  // ###### JoyStickHandler ######

  /**
    @brief Adds a new joy stick handler.
    @param handler Pointer to the handler object.
    @param name Unique name of the handler.
    @return True if added, false if name already existed.
  */
  bool InputManager::addJoyStickHandler(JoyStickHandler* handler, const std::string& name)
  {
    if (_getSingleton().joyStickHandlers_.find(name) == _getSingleton().joyStickHandlers_.end())
    {
      _getSingleton().joyStickHandlers_[name] = handler;
      return true;
    }
    else
      return false;
  }

  /**
    @brief Removes a JoyStick handler from the list.
    @param name Unique name of the handler.
    @return True if removal was successful, false if name was not found.
  */
  bool InputManager::removeJoyStickHandler(const std::string &name)
  {
    for (std::vector<OIS::JoyStick*>::iterator itstick = _getSingleton().joySticks_.begin();
          itstick != _getSingleton().joySticks_.end(); itstick++)
      disableJoyStickHandler(name, itstick - _getSingleton().joySticks_.begin());

    std::map<std::string, JoyStickHandler*>::iterator it = _getSingleton().joyStickHandlers_.find(name);
    if (it != _getSingleton().joyStickHandlers_.end())
    {
      _getSingleton().joyStickHandlers_.erase(it);
      return true;
    }
    else
      return false;
  }

  /**
    @brief Returns the pointer to a handler.
    @param name Unique name of the handler.
    @return Pointer to the instance, 0 if name was not found.
  */
  JoyStickHandler* InputManager::getJoyStickHandler(const std::string& name)
  {
    std::map<std::string, JoyStickHandler*>::iterator it = _getSingleton().joyStickHandlers_.find(name);
    if (it != _getSingleton().joyStickHandlers_.end())
    {
      return (*it).second;
    }
    else
      return 0;
  }

  /**
    @brief Enables a specific joy stick handler that has already been added.
    @param name Unique name of the handler.
    @return False if name or id was not found, true otherwise.
  */
  bool InputManager::enableJoyStickHandler(const std::string& name, unsigned int ID)
  {
    // get handler pointer from the map with all stored handlers
    std::map<std::string, JoyStickHandler*>::const_iterator handlerIt = _getSingleton().joyStickHandlers_.find(name);
    if (handlerIt == _getSingleton().joyStickHandlers_.end())
      return false;

    // check for existence of the ID
    if (ID >= _getSingleton().joySticksSize_)
      return false;

    // see whether the handler already is in the list
    for (std::vector<JoyStickHandler*>::iterator it = _getSingleton().activeJoyStickHandlers_[ID].begin();
          it != _getSingleton().activeJoyStickHandlers_[ID].end(); it++)
    {
      if ((*it) == (*handlerIt).second)
      {
        _getSingleton().stateRequest_ = IS_CUSTOM;
        return true;
      }
    }
    _getSingleton().activeJoyStickHandlers_[ID].push_back((*handlerIt).second);
    _getSingleton().stateRequest_ = IS_CUSTOM;
    return true;
  }

  /**
    @brief Disables a specific joy stick handler.
    @param name Unique name of the handler.
    @return False if name or id was not found, true otherwise.
  */
  bool InputManager::disableJoyStickHandler(const std::string &name, unsigned int ID)
  {
    // get handler pointer from the map with all stored handlers
    std::map<std::string, JoyStickHandler*>::const_iterator handlerIt = _getSingleton().joyStickHandlers_.find(name);
    if (handlerIt == _getSingleton().joyStickHandlers_.end())
      return false;

    // check for existence of the ID
    if (ID >= _getSingleton().joySticksSize_)
      return false;

    // look for the handler in the list
    for (std::vector<JoyStickHandler*>::iterator it = _getSingleton().activeJoyStickHandlers_[ID].begin();
          it != _getSingleton().activeJoyStickHandlers_[ID].end(); it++)
    {
      if ((*it) == (*handlerIt).second)
      {
        _getSingleton().activeJoyStickHandlers_[ID].erase(it);
        _getSingleton().stateRequest_ = IS_CUSTOM;
        return true;
      }
    }
    return true;
  }

  /**
    @brief Checks whether a joy stick handler is active
    @param name Unique name of the handler.
    @return False if key handler is not active or doesn't exist, true otherwise.
  */
  bool InputManager::isJoyStickHandlerActive(const std::string& name, unsigned int ID)
  {
    // get handler pointer from the map with all stored handlers
    std::map<std::string, JoyStickHandler*>::const_iterator handlerIt = _getSingleton().joyStickHandlers_.find(name);
    if (handlerIt == _getSingleton().joyStickHandlers_.end())
      return false;

    // check for existence of the ID
    if (ID >= _getSingleton().joySticksSize_)
      return false;

    // see whether the handler already is in the list
    for (std::vector<JoyStickHandler*>::iterator it = _getSingleton().activeJoyStickHandlers_[ID].begin();
          it != _getSingleton().activeJoyStickHandlers_[ID].end(); it++)
    {
      if ((*it) == (*handlerIt).second)
        return true;
    }
    return false;
  }

}