#ifndef __ScreenManager
#define __ScreenManager

#include <LiquidCrystal.h>


class ScreenManager;


class BaseScreen
{
  private:
    ScreenManager* mScreenManager;

  protected:
    ScreenManager* getScreenManager();
    unsigned long getCurrentTime();
    LiquidCrystal* getDisplay();


    void printTime(int value);

  public:
    BaseScreen(ScreenManager* screenManager)
    {
      mScreenManager = screenManager;
    }

    virtual ~BaseScreen() {}

    virtual void onShow() = 0;
    virtual void onHide() = 0;

    virtual void onButton() = 0;
    virtual void onEncoder(long lastPosition, long newPosition) = 0;
    virtual void onTick() = 0;
};



class ScreenManager
{
  private:
    LiquidCrystal* mDisplay;
    unsigned long* mCurrentTime;

    BaseScreen* mCurrent = NULL;

  public:
    ScreenManager(LiquidCrystal* display, unsigned long* currentTime)
    {
      mDisplay = display;
      mCurrentTime = currentTime;
    }


    inline BaseScreen* getCurrent()
    {
      return mCurrent;
    }


    inline unsigned long getCurrentTime()
    {
      return *mCurrentTime;
    }

    inline LiquidCrystal* getDisplay()
    {
      return mDisplay;
    }


    template<class T> void show()
    {
      if (mCurrent != NULL)
      {
        mCurrent->onHide();
        delete(mCurrent);
      }

      mCurrent = new T(this);
      mCurrent->onShow();
    }
};

#endif