//package cal;

import java.rmi.registry.LocateRegistry;
import java.rmi.registry.Registry;
import java.io.*;
import java.util.*;

import static java.lang.System.*;

public class CalculatorClient {

    private CalculatorClient() {}

    public static void main(String[] args) {

		String host = (args.length < 1) ? null : args[0];

		try {

			Registry registry = LocateRegistry.getRegistry(host);
			Calculator stub = (Calculator) registry.lookup("Calculator");


			//this section is going to try open a testing file (if found) and execute it
			try (BufferedReader br = new BufferedReader(new FileReader("test.txt"))) {

    			String line;
    			String token;
    			int value;
    			int response;
    			boolean empty;

    			//reading line by line
    			while ((line = br.readLine()) != null) {

       				StringTokenizer tokenizer = new StringTokenizer(line);

       				while(tokenizer.hasMoreToken()) {

       					token = tokenizer.nextToken();
       					if(token == "+" ||token == "/" || token == "-" || token == "*") {

       						stub.pushOperator(token);
       					}

       					else if(token == "pop") {

       						response = stub.pop();
       						System.out.println(response);

       					}
       					else if(token == "delay") {

       						token = tokenizer.nextToken();
       						value = Integer.parseInt(token);
       						stub.delayPop(value);
       					}
       					else if(token == "empty") {

       						empty = stub.isEmpty();
       						System.out.println(empty);

       					}
       					else {

       						try{
       							//check if the token is a integer
							  int num = Integer.parseInt(token);
							  stub.pushValue(num);

							} catch (NumberFormatException error) {
							  System.err.println("wrong input");
							}
       					}

       				}
       				//end of line is reached, so pop everything
       				response = stub.pop();
       				System.out.println(response);

    			}
    		br.close();
			} catch(IOException error) {
				System.err.println("File not found");
			}

		} catch (Exception error) {
			System.err.println("Client exception: " + error.toString());
			error.printStackTrace();
		}
	}
}