package clock;

public class Clock {

private ClockState state;

private int hour;

private int minute;

private int second;

private ClockObserver observer;

private final int MAXHOUR = 12;

private final int MAXMINUTE = 60;

private final int MAXSECOND = 60;

public Clock(){

setState(new DisplayTimeState());

hour = 0;

minute = 0;

second = 0;

}

public void increment(){

state.increment(this);

}

public void decrement(){

state.decrement(this);

}

public void changeMode(){

state.changeMode(this);

}

public void cancel(){

state.cancel(this);

}

public void timerTick(){

state.timerTick(this);

}

public void resigterObserver(ClockObserver observer) {

this.observer = observer;

}

public void setState(ClockState newState){

this.state = newState;

}

public StateName getStateName(){

return this.state.getName();

}

public int getHour() {

return hour;

}

public void setHour(int hour) {

this.hour = (hour+MAXHOUR)%MAXHOUR;

notifyObserver();

}

public int getMinute() {

return minute;

}

public void setMinute(int minute) {

this.minute = (minute+MAXMINUTE)%MAXMINUTE;

notifyObserver();

}

public int getSecond() {

return second;

}

public void setSecond(int second) {

this.second = (second+MAXSECOND)%MAXSECOND;

notifyObserver();

}

private void notifyObserver(){

if(observer != null){

observer.update();

}

}

}