import list.*;

/**
* A simple test program for AList and its subclasses.
*
* @author Dung X. Nguyen
*/
public class ListClient
{
    private AList pc0 = ListFactory.Singleton.makeEmptyList();
    private AList pc1 = ListFactory.Singleton.makeNEList (new Integer (-1), pc0);
    private AList p1  = ListFactory.Singleton.makeNEList ("-5", pc0); // NOTE: "-5" is a String, not an Integer!
    private AList p2  = ListFactory.Singleton.makeNEList (new Integer (2), p1);
    private AList p3  = ListFactory.Singleton.makeNEList (new Integer (-4), p2);
    private AList p4  = ListFactory.Singleton.makeNEList (new Integer (3), pc1);

    public static void main (String[] args)
    {
	ListClient client = new ListClient ();  // uses default constructor!
	client.testToString ();
	client.testMakeClone ();
	client.testNthElement ();
	client.testLastElement ();
	client.testFirstElements ();
	client.testReverse ();
	client.testAppend ();
    }

    private void testToString()
    {
	System.out.println ("\nTesting toString(): \n");
	System.out.println ("EmptyList = " + pc0 );
	System.out.println ("(-1) = " + pc1);
	System.out.println ("(3 -1) = " + p4);
	System.out.println ("(-5) = " + p1);
	System.out.println ("(2 -5) = " + p2);
	System.out.println ("(-4 2 -5) = " + p3);
    }

    private void testMakeClone()
    {
	System.out.println ("\nTesting makeClone(): \n");
	System.out.println ("EmptyList.makeClone () = " + pc0.makeClone ());
	System.out.println ("(-1).makeClone () = " + pc1.makeClone ());
	System.out.println ("(3 -1).makeClone () = " + p4.makeClone ());
	System.out.println ("(-4 2 -5).makeClone () = " + p3.makeClone ());
    }

    private void testNthElement()
    {
	System.out.println ("\nTesting nthElement(): \n");
	try {
	    System.out.println ("EmptyList.nthElement (2) = " + pc0.nthElement (2));
	}
	catch (Exception e) {
	    System.out.println (e);
	}
	System.out.println ("(-1).nthElement (0) = " + pc1.nthElement (0));
	System.out.println ("(3 -1).nthElement (1) = " + p4.nthElement (1));
	System.out.println ("(-4 2 -5).nthElement (0) = " + p3.nthElement (0));
	System.out.println ("(-4 2 -5).nthElement (1) = " + p3.nthElement (1));
	System.out.println ("(-4 2 -5).nthElement (2) = " + p3.nthElement (2));
	try {
	    System.out.println ("(-4 2 -5).nthElement (3) = " + p3.nthElement (3));
	}
	catch (Exception e) {
	    System.out.println (e);
	}
    }

    private void testLastElement()
    {
	System.out.println ("\nTesting lastElement(): \n");
	try {
	    System.out.println ("EmptyList.lastElement () = " + pc0.lastElement ());
	}
	catch (Exception e) {
	    System.out.println (e);
	}
	System.out.println ("(-1).lastElement () = " + pc1.lastElement ());
	System.out.println ("(3 -1).lastElement () = " + p4.lastElement ());
	System.out.println ("(-4 2 -5).lastElement () = " + p3.lastElement ());
    }

    private void testFirstElements()
    {
	System.out.println ("\nTesting firstElements(): \n");
	System.out.println ("EmptyList.firstElements (2) = " + pc0.firstElements (2));
	System.out.println ("(-1).firstElements (0) = " + pc1.firstElements (0));
	System.out.println ("(3 -1).firstElements (1) = " + p4.firstElements (1));
	System.out.println ("(-4 2 -5).firstElements (0) = " + p3.firstElements (0));
	System.out.println ("(-4 2 -5).firstElements (1) = " + p3.firstElements (1));
	System.out.println ("(-4 2 -5).firstElements (2) = " + p3.firstElements (2));
	System.out.println ("(-4 2 -5).firstElements (3) = " + p3.firstElements (3));
	System.out.println ("(-4 2 -5).firstElements (4) = " + p3.firstElements (4));
    }

    private void testReverse()
    {
	System.out.println ("\nTesting reverse(): \n");
	System.out.println ("EmptyList.reverse () = " + pc0.reverse ());
	System.out.println ("(-1).reverse () = " + pc1.reverse ());
	System.out.println ("(3 -1).reverse () = " + p4.reverse ());
	System.out.println ("(-4 2 -5).reverse () = " + p3.reverse ());
    }

    private void testAppend()
    {
	System.out.println ("\nTesting append(): \n");
	System.out.println ("EmptyList.append (p4) = " + pc0.append (p4));
	System.out.println ("(-1).append (pc0) = " + pc1.append (pc0));
	System.out.println ("(3 -1).append (p3) = " + p4.append (p3));
	System.out.println ("(-4 2 -5).append (p2) = " + p3.append (p2));
    }
}