/** RungPerson is for testing with a "ring only" RingingPhone.
 * In this way the two classes are isolated so that only
 * the two need testing. <br>
 * For 2 phone demo code for COM1204 OO Design Sp 2001
 *
 * @author Bob Futrelle
 * @version 0.1, 4/28/2001
 */


public class RungPerson  {

    /**
     * This is a very simple test, since it
     * only needs to create a RingingPhone and
     * a RungPerson and step them both.
     */
    public static void main (String[] args) {
	RingingPhone myPhone = new RingingPhone();
	RungPerson me = new RungPerson();
	me.givePhone(myPhone);
	PUtil.verbose = true;

	for(int i=0; i < 20 ; i++) {

	    myPhone.step();
	    me.step();

	} // step() loop

    } // main()

    private boolean free = true;
    private String whatIHear;
    private String ring = "RING!";
    private int countDownToHangUp;
    private RingingPhone myPhone;

    public void givePhone(RingingPhone phone) {
	myPhone =  phone;
    }

    /**
     * This listens for a ring, echoes what it hears and hangs up.
     * It interacts only with at RingingPhone, for testing purposes.
     * The design was done by workikng out the operation of
     * step() and then designing the methods it used.
     */
    public void step(){

	if(free) {
	    whatIHear = myPhone.listen();
	    if(whatIHear == ring){
		free = false;
		PUtil.out("RungPerson heard a RING!");
		countDownToHangUp = 6;
	    }
	} // if free
	else {
	    countDownToHangUp-- ;

	    if (countDownToHangUp == 0) {
		free = true;
		PUtil.out("RUNGPERSON HANGS UP");
		myPhone.hangup();
	    } // hangup

	    else {
		PUtil.out("RungPerson heard ->" +
			  myPhone.listen());
	    } // or keep talking

	} // not free, so talking or hanging up

    } // step()

} // class RungPerson