// *************************************************************
//   IntListTest.java
//
//   Driver to test IntList methods.
// *************************************************************
import java.io.*;

public class IntListTest
{

    private static IntList list = new IntList();
    private static BufferedReader keyboard =
                                    new BufferedReader(new InputStreamReader(System.in));

    //----------------------------------------------------------------
    // Creates a list, then repeatedly prints the menu and does what
    // the user asks until they quit.
    //----------------------------------------------------------------
    public static void main(String[] args) throws IOException
    {
        printMenu();
        int choice = Integer.parseInt(keyboard.readLine());
        while (choice != 0)
            {
                dispatch(choice);
                printMenu();
                choice = Integer.parseInt(keyboard.readLine());

            }
    }


    //----------------------------------------
    //  Does what the menu item calls for.
    //----------------------------------------
    public static void dispatch(int choice) throws IOException
    {
        int newVal;
        switch(choice)
            {
            case 0:
                System.out.println("Bye!");
                break;

            case 1:    //add to front
                System.out.print("\nEnter integer to add to front: ");
                newVal = Integer.parseInt(keyboard.readLine());
                list.addToFront(newVal);
                list.print();
                break;

            case 2:   //add to end
                System.out.print("\nEnter integer to add to end: ");
                newVal = Integer.parseInt(keyboard.readLine());
                list.addToEnd(newVal);
                list.print();
                break;

            case 3:  //remove first element
                list.removeFirst();
                System.out.println("\nThe first integer in the list has been removed.");
                list.print();
                break;

            case 4:  //print
                list.print();
                break;
            default:
                System.out.println("\nSorry, invalid choice");
            }
    }



    //----------------------------------------
    //  Prints the user's choices
    //----------------------------------------
    public static void printMenu()
    {
        System.out.println("\n   Menu   ");
        System.out.println("   ====");
        System.out.println("0: Quit");
        System.out.println("1: Add an integer to the front of the list");
        System.out.println("2: Add an integer to the end of the list");
        System.out.println("3: Remove an integer from the front of the list");
        System.out.println("4: Print the list");

        System.out.print("\nEnter your choice: ");
    }


}