// ======================================================
//
// Represents a Pelican crossing
//
// ======================================================

#ifndef PELICAN_H
#define PELICAN_H

#include "Subject.h"

class PelicanTimer;

class Pelican : public Subject {
  public:
    Pelican();

    // call when the WAIT button has been pressed
    void press(void);

    // states that a Pelican can be in
    enum PelicanState { RED_STATE, YELLOW_FLASHING, GREEN_TIMING, GREEN_IDLE, YELLOW_STATE };

    bool isPressed() const { return pressed; }
    PelicanState getState() const { return state; }

  private:
    // state that this Pelican is in
    PelicanState state;

    // called by PelicanTimer when the lights need to change
    void timerExpired(void);

    const unsigned int RED_TIME;
    const unsigned int YELLOW_TIME;
    const unsigned int GREEN_TIME;
    const unsigned int FLASH_TIME;

    // indicates whether the WAIT light should be on
    bool pressed;

    // Timer that indicates when the lights should change
    PelicanTimer *myTimer;

  private:
    //  prevent general use of copy ctor and operator=
    Pelican(const Pelican &);
    Pelican &operator=(const Pelican &);
};

#endif