package com.company;

import java.io.*;
import java.net.Socket;
import java.util.Scanner;

public class Main {

    public static void main(String[] args) throws Exception {
        int port = 9003;
        String ip = "172.30.116.172";

        Scanner scanner = new Scanner(System.in);

        System.out.println("Starting...");
        Socket socket = new Socket(ip, port);
        System.out.println(socket.isConnected());
        char response = '\0';
        int no;

        DataInputStream socketIn = new DataInputStream(socket.getInputStream());
        DataOutputStream socketOut = new DataOutputStream(socket.getOutputStream());

        while(response != '=') {
            System.out.print("Enter a number: ");
            no = scanner.nextInt();
            socketOut.writeInt(no);
            socketOut.flush();

            // C char is 1 byte, Java char is 2 bytes, so it waits until a second byte is received
            // workaround: read only one byte from the stream and convert it to a char
            byte[] b = new byte[] { 0 };
            socketIn.readFully(b, 0, 1);
            response = (char)b[0];

            if(response == '<') {
                System.out.println("Enter a lesser number!");
            } else if(response == '>') {
                System.out.println("Enter a bigger number!");
            }
        }

        int attempts = socketIn.readInt();
        System.out.println("Attempts: " + attempts);

    }
}