package ClientServer;

/**
 * @author Ricardo Gaspar 
 */

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

public class MyClient {
	
	public static void main(String[] args ) throws Exception {
		
		if( args.length != 3 ) {
			System.out.printf("usage: java MyClient maquina_do_servidor porto_servidor_envio porto_servidor_recep¨‹o\n") ;
			System.exit(0);
		}

		// Criar um scanner auxiliar para ler linhas completas do canal de entrada standard.
		Scanner in = new Scanner( System.in ) ;
		
		// Preparar endereco e o porto do servidor
		String servidor = args[0] ;
		int portB = Integer.parseInt( args[1] ) ;
		InetAddress serverAddressB = InetAddress.getByName( servidor ) ;
		
		//Servidor do pr—prio Cliente
		int portA = Integer.parseInt( args[2] ) ;
		InetAddress serverAddressA = InetAddress.getByName( "127.0.0.1" ) ;
		
		// Preparar o socket para trocar mensagens (datagramas)
		DatagramSocket socket = new DatagramSocket() ;
	
		// Ler o pedido do canal "standard input".
		String request = in.nextLine() ;
		byte[] requestData = request.getBytes() ;
		
		//Ciclo para envio continuo de mensagens
		while(!request.equalsIgnoreCase("end")){
			// Criar a mensagem para enviar
			DatagramPacket echoRequest = new DatagramPacket( requestData, requestData.length ) ;
			echoRequest.setAddress( serverAddressB ) ;
			echoRequest.setPort( portB ) ;
			
			socket.send( echoRequest ) ;
			
			echoRequest.setAddress( serverAddressA ) ;
			echoRequest.setPort( portA ) ;
			
			socket.send( echoRequest ) ;
			
			request = in.nextLine();
			requestData = request.getBytes();
		}
	}	
}