/**
 * @author: Jeff Thompson
 * See COPYING for copyright and distribution information.
 */

#include <stdexcept>
#include "../NDN.hpp"
#include "../c/encoding/BinaryXMLElementReader.h"
#include "TcpTransport.hpp"

using namespace std;

namespace ndn {

void TcpTransport::connect(NDN &ndn)
{
  ndn_Error error;
  if (error = ndn_TcpTransport_connect(&transport_, (char *)ndn.getHost(), ndn.getPort()))
    throw std::runtime_error(ndn_getErrorString(error)); 
  
  // TODO: Properly indicate connected status.
  ndn_ = &ndn;
}

void TcpTransport::send(unsigned char *data, unsigned int dataLength)
{
  ndn_Error error;
  if (error = ndn_TcpTransport_send(&transport_, data, dataLength))
    throw std::runtime_error(ndn_getErrorString(error));  
}

void TcpTransport::tempReceive()
{
  if (!ndn_)
    // TODO: Properly check if connected.
    return;
  
  try {
    ndn_BinaryXMLElementReader elementReader;
    // Automatically cast ndn_ to (struct ndn_ElementListener *)
    ndn_BinaryXMLElementReader_init(&elementReader, ndn_);
    
    ndn_Error error;
    unsigned char buffer[8000];
    unsigned int nBytes;
    if (error = ndn_TcpTransport_receive(&transport_, buffer, sizeof(buffer), &nBytes))
      throw std::runtime_error(ndn_getErrorString(error));  

    ndn_BinaryXMLElementReader_onReceivedData(&elementReader, buffer, nBytes);
  } catch (...) {
    // This function is called by the socket callback, so don't send an exception back to it.
    // TODO: Log the exception?
  }
}

}