import java.io.IOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;
import java.util.Arrays;

public class VoteClientUDP {

  public static void main(String args[]) throws IOException {

    if (args.length != 3) { // Test for correct # of args
      throw new IllegalArgumentException("Parameter(s): <Destination>" +
                                          " <Port> <Candidate#>");
    }

    InetAddress destAddr = InetAddress.getByName(args[0]); // Destination addr
    int destPort = Integer.parseInt(args[1]); // Destination port
    int candidate = Integer.parseInt(args[2]); // 0 <= candidate <= 1000 req'd

    DatagramSocket sock = new DatagramSocket(); // UDP socket for sending
    sock.connect(destAddr, destPort);

    // Create a voting message (2nd param false = vote)
    VoteMsg vote = new VoteMsg(false, false, candidate, 0);

    // Change Text to Bin here for a different coding strategy
    VoteMsgCoder coder = new VoteMsgTextCoder();

    // Send request
    byte[] encodedVote = coder.toWire(vote);
    System.out.println("Sending Text-Encoded Request (" + encodedVote.length
        + " bytes): ");
    System.out.println(vote);
    DatagramPacket message = new DatagramPacket(encodedVote, encodedVote.length);
    sock.send(message);

    // Receive response
    message = new DatagramPacket(new byte[VoteMsgTextCoder.MAX_WIRE_LENGTH],
        VoteMsgTextCoder.MAX_WIRE_LENGTH);
    sock.receive(message);
    encodedVote = Arrays.copyOfRange(message.getData(), 0, message.getLength());

    System.out.println("Received Text-Encoded Response (" + encodedVote.length
        + " bytes): ");
    vote = coder.fromWire(encodedVote);
    System.out.println(vote);
  }
}