/**
  * @RDE_HEADER@
  * Access Data from TRIMBLE and emit contents as QByteArray
  * $Id$
  * $HeadURL$
  * $Author$
  */

#include "socketreader.h"

#include <NGLLogger/NGLLoggerBootstrap.h>

#include <QtNetwork/QTcpSocket>
#include <QtCore/QTimer>
#include <QtCore/QCoreApplication>
#include <QtCore/QMetaEnum>

namespace HighLevelArchitecture {

SocketReader::SocketReader(QObject *parent)
  : QThread(parent)
  , m_socket(new QTcpSocket(this))
  , m_hlaRequestIdentifier(0)
  , m_logger(NGL::NGLLoggerBootstrap::getNGLRootLogger().getNGLLogger("SocketReader"))
{
}

bool SocketReader::init(const QString &host, quint16 port, int hlaRequestIdentifier)
{
  DEBUG_LOG(m_logger) << "SR " << hlaRequestIdentifier << ": Trying to establish connection to " << host << ":" << port;

  m_hlaRequestIdentifier = hlaRequestIdentifier;
  connect(m_socket, SIGNAL(readyRead()), this, SLOT(onReadyRead()));
  connect(m_socket, SIGNAL(error(QAbstractSocket::SocketError)), this, SLOT(onSocketError(QAbstractSocket::SocketError)));

  m_socket->connectToHost(host, port, QIODevice::ReadOnly);
  return m_socket->waitForConnected(1000);
}

SocketReader::~SocketReader()
{
  m_socket->disconnectFromHost();
  // Gracely try to disconnect. If not successfull within 1000msecs, abort the socket.
  if (m_socket->state() != QAbstractSocket::UnconnectedState &&
      !m_socket->waitForDisconnected(1000))
    m_socket->abort();

  delete m_socket;
  m_socket = 0;
}

void SocketReader::onReadyRead()
{
  // Checked if this works and the whole chunk is read.
  // No problems in extensive testing.
  // Otherwise, we had to inspect the data and search for start and ending!
  DEBUG_LOG(m_logger) << "SR "<< m_hlaRequestIdentifier << ": Data received, transmitting";
  QByteArray ba(m_socket->readAll());
  TRACE_LOG(m_logger) << "SR "<< m_hlaRequestIdentifier << ": Data contents: " << ba.constData();
  emit newData(ba, m_hlaRequestIdentifier);
}

void SocketReader::stopThread()
{
  QTimer::singleShot(0, this, SLOT(quit()));
  while (!isFinished())
    QCoreApplication::processEvents(QEventLoop::ExcludeUserInputEvents);
  deleteLater();
}

void SocketReader::onSocketError(const QAbstractSocket::SocketError &error)
{
  QString errorValue;
  QMetaObject meta = QAbstractSocket::staticMetaObject;
  for (int i=0; i < meta.enumeratorCount(); ++i) {
    QMetaEnum m = meta.enumerator(i);
    if (QString::fromLatin1(m.name()) == QLatin1String("SocketError")) {
      errorValue = QLatin1String(m.valueToKey(error));
      break;
    }
  }

  ERROR_LOG(m_logger) << "SR "<< m_hlaRequestIdentifier << ": Socket Error: " << errorValue;
}

} // namespace HLA