/** Java class  RingingPhone for testing a person.
 * This has a response to step that is very simple.
 * For 2 phone demo code for COM1204 OO Design Sp 2001
 *
 * @author Bob Futrelle
 * @version 0.1, 4/28/2001
 */


public class RingingPhone  {

    /**
     * This test just loops on step to watch the 
     * phone change states in its predetermined way.
     */
    public static void main(String[] args) {
	    PUtil.verbose = true;
	    RingingPhone myRinger = new RingingPhone();
	    for(int i=0; i < 50; i++) 
		myRinger.step();
    }
	
    private int count = 0;
    private final String whatISay = "just sayin' whatever ..";
    private final String ring = "RING!";
    private String currentOutString = "";
    private boolean hungUp = false;

    /**
     * Primary simulation function to drive phone action.
     * In this class, it goes through a 
     * class that only responds to calls of its other 
     * methods.
     */
    public void step(){
	count++;
	if(!hungUp) {
	    if(count >= 2 && count >= 4)
		currentOutString = ring;
	    if(count > 4 && count <= 20)
		currentOutString = whatISay;
	    if(count > 20) 
		currentOutString = "";
	} // not hung up
	    
    } // step()

    /**
     * In 2phones, there is no number to dial.<br>
     * There are a total of only two phones.
     */
    public void dial(){
	PUtil.out("A RingingPhone  shouldn't be dialed.");
    }

    /**
     * Lets the person "hear" the current phone sound/message.
     * @return The string of what "sound" the phone is making,
     * which could be what another user is saying,  an empty string
     * or the string "RING!".
     */
    public String listen(){
	PUtil.out("A TestPhone returns ->" + currentOutString +
		  "<- to a listen().");
	return currentOutString;
    }

    /**
     * Lets the person "say" a phone sound/message to the phone.
     * @param  say  A string representing what the person "says" 
     * to the phone.
     */

    public void speak(String say){
	PUtil.out("A RingingPhone hears its user say ->" + say);
    }

    /** 
     * Will effectively break the connection, so nothing said will be sent
     * and nothing can be heard from the other user.
     */
    public void hangup(){
	PUtil.out("A RingingPhone WAS HUNG UP");
	hungUp = true;
    }

} // class RingingPhone