/*
 * Author:  Adriana Ferraro
 * Date:    Semester 1, 2007
 * Purpose: This program executes the exercises
 * in the lecture 18 slides
 */

public class TrafficLight {
	public static final int GREEN = 0;
	public static final int ORANGE = 1;
	public static final int RED = 0;
	
	private int showing;
	private int idNumber;
	
	public TrafficLight(int id) {
		idNumber = id;
		showing = (int)(Math.random() * 3);
	}
	public void setColour(int colourIndex) {
		showing = colourIndex % 3;
	}
	public void change() {
		showing++;
		showing = showing % 3;
	}
	public boolean equals(TrafficLight other) {
		if (showing == other.showing && idNumber == other.idNumber) {
			return true;
		}
		return false;
	}
	public boolean showsSameColour(TrafficLight other) {
		if (showing == other.showing) {
			return true;
		}
		return false;
	}
	public String toString() {
		String outS = "";
		outS = "Traffic light: " + idNumber;
		outS = outS + ", showing: " + getColour(showing);
		return outS;
	}
	
	private String getColour(int index) {
		final String[] colours = {"GREEN", "ORANGE", "RED" };
		return colours[index];
	}
//--------------------------------------------------
//--------------------------------------------------
	public static void main(String[] args) {
		TrafficLight t1, t2;
		t1 = new TrafficLight(334);
		t2 = new TrafficLight(335);
		for( int i=0; i<5; i++) {
			t1.change();
			System.out.println(i + " " + t1.toString());
		}
		System.out.println();
		
		for( int i=0; i<5; i++) {
			if(Math.random() < 0.5) {
				t1.change();
			}
			if(Math.random() < 0.5) {
				t2.change();
			}
			System.out.println("TIME: " + i);
			System.out.println(t1.toString());
			System.out.println(t2.toString());
			System.out.println("Same colour: " + t1.showsSameColour(t2));
			System.out.println();
		
		}
		
		
	}
}