/**
 * This is Java-like pseudocode that corresponds to the state machine shown
 * in FSM_example.pdf.
 */
public class StateExample
{
    // Could do this with a group of constants instead
    public enum State {
        SLEEPING, BREAKFAST, TALKING, CLASS
    };
    
    private State myState; // The state we're in
    
    /**
     * Take some new event and decide what to do next. Depends on the state
     * we're in. The tests for events are pseudocode (e.g. "event is alarm"),
     * as is some of the other code (e.g. "press snooze").
     */
    public void handleEvent()
    {
        switch (myState)
        {
            case SLEEPING:
                if (event is alarm) {
                    if (snoozeCtr < 2) {
                        press snooze
                        snoozeCtr++;
                        System.out.println("Just gonna snooze a bit...");
                    } 
                    else {
                        snoozeCtr = 0;
                        System.out.println("Guess I gotta get up...");
                        myState = State.BREAKFAST;
                    }
                }
                else if (event is phone rings) {
                    System.out.println("Hey!  I was sleeping.  Bye.");
                }
                else
                    error
                break;
                
            case BREAKFAST:
                if (phone rings) {
                    System.out.println("Sure, I'd be happy to talk");
                    myState = State.TALKING;
                }
                else if (time for class) {
                    grab books;
                    walk to class;
                    System.out.println("Off to class I go...");
                    myState = State.CLASS;
                }
                else 
                    error
                break;
                
            case TALKING:
                if (I'm done || they're done) {
                    System.out.println("Ok.  Bye.");
                    myState = State.BREAKFAST;
                }
                else 
                    error
                break;
                
            case CLASS:
                if (phone rings) {
                    pretend it's not yours;
                    System.out.println("Whose is that??");
                }
                else if (class ends) {
                    myState = next_place_to_wait;
                    System.out.println("Off to somewhere else");
                }
                else 
                    error
                break;
                
            default:
                System.out.println("Unexpected state!");
        }
        
    }
}