import java.io.*;
import java.net.*;

//Operating Systems & Networks
//Candidate Number 31025
//Networks Assignment One
//Date 26th May 2011

/*
  This is the client side of the TCP client/server example
*/

public class FSC {
    public static void main (String args[])throws Exception{

          /* if you have time at the end take a look at the exceptions that might be raised and think about nicer ways of handling them */
        //String reply;
        // prepare to get input from the console
        // A BufferedReader provides nice methods like readLine()
        // and is more efficient than just using InputStreamReader
        BufferedReader inFromUser = new BufferedReader(new InputStreamReader(System.in));
        // create the client socket
        // This is just a generic Socket object - we need to specify
        // the address (or name) of machine running your server,
        // plus the port number your server is listening on
        // if this method doesn't throw an exception, then we have
        // successfully opened a connection to the server
        // If you get an error like "connection refused", then the
        // server probably isn't running
        Socket clientSocket = new Socket("localhost", 2845);
        //InetAddress host = clientSocket.getInetAddress();

        // a DataOutputStream is a portable way of feeding Java types
        // into something that expects a stream of bytes (a socket doesn't
        // know about strings/int etc, it just sees bytes)
        // Java IO is ridiculously complicated ...
        DataOutputStream outToServer = new DataOutputStream(clientSocket.getOutputStream());

        // BufferedReader gives us the readLine() method, and an
        // InputStreamReader decodes bytes into characters
        BufferedReader inFromServer = new BufferedReader(new InputStreamReader(clientSocket.getInputStream()));

        // read the actual sentence from the console
        System.out.print("Password: ");
        String messageCmd = inFromUser.readLine();
        String messagePrm = inFromUser.readLine();

        // write a stream of bytes to the socket
        // we need the end-of-line character so the server knows when
        // the client has stopped sending (actually so the readLine()
        // method works)
        sendCommand(messageCmd, messagePrm, outToServer, inFromServer);
        //outToServer.writeBytes(message + "\n");

        // get the response from the server - this method waits until
        // the server has sent a whole string

        //System.out.println(reply);

        // close the socket and the connection
        clientSocket.close();
    }
    public static String sendCommand(String messageCmd, String messagePrm, DataOutputStream outToServer, BufferedReader inFromServer) throws IOException{
        // a DataOutputStream is a portable way of feeding Java types
        // into something that expects a stream of bytes (a socket doesn't
        // know about strings/int etc, it just sees bytes)
        // Java IO is ridiculously complicated ...

        outToServer.writeBytes(messageCmd + " " + messagePrm + "\n");

        //TODO: FIX This needs to be converted to an int!

        int responseLength = Integer.parseInt(inFromServer.readLine());

        String response = "";

        //read a character at a time and append to string
        for(int i = 0; i < responseLength; i++) {
          response = response + Character.toString((char) inFromServer.read());
        }
        return response;
    }

}