/*
 *
 */
package userInterface;

import java.util.Scanner;

import eg.edu.alexu.csd.datastructure.stack.cs20.Stack;

// TODO: Auto-generated Javadoc
/**
 * The Class StackUI.
 */
public class StackUI {

    /** The inp. */
    static Scanner inp;

    /** The obj. */
    static Stack obj = new Stack();

    /**
     * The main method.
     *
     * @param args
     *            the arguments
     */
    public static void main(String[] args) {
        while (true) {
            printInterface();
            inp = new Scanner(System.in);
            int n = inp.nextInt();

            if (n == 1)
                pushFunc();
            else if (n == 2)
                popFunc();
            else if (n == 3)
                peekFunc();
            else if (n == 4)
                getSizeFunc();
            else if (n == 5)
                emptyFunc();
            else if (n == 6) {
                System.out.println("Program Terminated.");
                break;
            } else
                System.out.println("Please enter a digit from 1-6.");
        }

    }

    /**
     * Pop func.
     */
    private static void popFunc() {
        if (obj.isEmpty())
            System.out.println("Stack is currently empty");
        else {
            System.out.print("The element popped is: ");
            System.out.println(obj.pop());
        }
    }

    /**
     * Peek func.
     */
    private static void peekFunc() {
        if (obj.isEmpty())
            System.out.println("Stack is currently empty");
        else {
            System.out.print("The top element is: ");
            System.out.println(obj.peek());
        }
    }

    /**
     * Empty func.
     */
    private static void emptyFunc() {
        if (obj.isEmpty())
            System.out.println("Yes, Stack is currently empty.");
        else
            System.out.println("No, Stack is not empty.");
    }

    /**
     * Gets the size func.
     *
     * @return the size func
     */
    private static void getSizeFunc() {
        System.out.print("Stack size = ");
        System.out.println(obj.size());
    }

    /**
     * Push func.
     */
    private static void pushFunc() {
        System.out.print("Please enter an element to be pushed into the stack: ");
        inp = new Scanner(System.in);
        Object newObj = inp.nextInt();
        obj.push(newObj);
        System.out.println("Element pushed into the stack.");
    }

    /**
     * Prints the interface.
     */
    public static void printInterface() {
        System.out.println("Please choose an action");
        System.out.println("-----------------------");
        System.out.println("1- Push");
        System.out.println("2- Pop");
        System.out.println("3- Peek");
        System.out.println("4- Get Size");
        System.out.println("5- Check if empty");
        System.out.println("6- Exit Program");
    }
}