package CS210;

import java.util.Scanner;

public class FindWayHome {

    private int top = -1;
    private String[] data;
    private int maxSize;

    public FindWayHome(int size) {
        this.top = -1;
        this.maxSize = size;
        this.data = new String[maxSize];
    }

    public void push(String input) {
        this.data[++top] = input;
    }

    public String pop() {
        return this.data[top--];
    }

    public String peek() {
        return this.data[top];
    }

    public boolean isEmpty() {
        return (this.top == -1);
    }

    public boolean isFull() {
        return (this.top == maxSize - 1);
    }

    public static void main(String[] args) {
        getDirections();
    }

    public static void getDirections() {
        Scanner sc = new Scanner(System.in);
        FindWayHome stack = new FindWayHome(10000);
        String input;
        boolean stop = false;

        System.out.println("Enter inputs");
        while (!stack.isFull() & !stop) {
            String tmp = sc.nextLine();
            input = tmp.toLowerCase();

            switch (input) {
                case "go north":
                    input = "go south";
                    break;
                case "go south":
                    input = "go north";
                    break;
                case "go west":
                    input = "go east";
                    break;
                case "go east":
                    input = "go west";
                    break;
                case "arrived":
                    stop = !stop;
                    break;
                case "go back":
                    stack.pop();
                    break;
                default:
                    System.out.println("Invalid input");
            }
            if (!stop)
                stack.push(input);

//            if (input.equalsIgnoreCase("Go North"))
//                input = "Go South";
//            else if (input.equalsIgnoreCase("Go South"))
//                input = "Go North";
//            else if (input.equalsIgnoreCase("Go West"))
//                input = "Go East";
//            else if (input.equalsIgnoreCase("Go East"))
//                input = "Go North";
//            else if (input.equalsIgnoreCase("arrived"))
//                stop = !stop;
//            else if (input.equalsIgnoreCase("go back"))
//                stack.pop();
//            else if (!stop)
//                stack.push(input);
//            if (!stop)
//                stack.push(input);
        }

        while (!stack.isEmpty())
            System.out.println(stack.pop());

        sc.close();
    }
}