/*##############################################################################
## Author: Shaun Reed                                                         ##
## Legal: All Content (c) 2022 Shaun Reed, all rights reserved                ##
## About: Input class from tutorials followed at trentreed.net                ##
##                                                                            ##
## Contact: shaunrd0@gmail.com	| URL: www.shaunreed.com | GitHub: shaunrd0   ##
##############################################################################*/

#ifndef QTOPENGL_INPUT_H
#define QTOPENGL_INPUT_H

#include <QPoint>
#include <Qt>

#include <qtkapi.h>
#include <qtkwidget.h>

namespace Qtk {
  class QTKAPI Input {
    public:
      /*************************************************************************
       * Typedefs
       ************************************************************************/
      friend class Qtk::QtkWidget;

      /**
       * Possible key states
       */
      enum InputState {
        InputInvalid,
        InputRegistered,
        InputUnregistered,
        InputTriggered,
        InputPressed,
        InputReleased
      };

      /*************************************************************************
       * Public Methods
       ************************************************************************/

      // State checking
      inline static bool keyTriggered(Qt::Key key) {
        return keyState(key) == InputTriggered;
      }

      inline static bool keyPressed(Qt::Key key) {
        return keyState(key) == InputPressed;
      }

      inline static bool keyReleased(Qt::Key key) {
        return keyState(key) == InputReleased;
      }

      inline static bool buttonTriggered(Qt::MouseButton button) {
        return buttonState(button) == InputTriggered;
      }

      inline static bool buttonPressed(Qt::MouseButton button) {
        return buttonState(button) == InputPressed;
      }

      inline static bool buttonReleased(Qt::MouseButton button) {
        return buttonState(button) == InputReleased;
      }

      // Implementation
      static InputState keyState(Qt::Key key);
      static InputState buttonState(Qt::MouseButton button);

      static QPoint mousePosition();
      static QPoint mouseDelta();

    private:
      /*************************************************************************
       * Private Methods
       ************************************************************************/

      // State updating
      static void update();
      static void registerKeyPress(int key);
      static void registerKeyRelease(int key);
      static void registerMousePress(Qt::MouseButton button);
      static void registerMouseRelease(Qt::MouseButton button);
      static void reset();
  };
}  // namespace Qtk

#endif  // QTOPENGL_INPUT_H