/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/***************************************************************************
 *            netcom.cc
 *
 *  Mon Aug 18 09:33:26 CEST 2008
 *  Copyright 2008 Bent Bisballe Nyeng
 *  deva@aasimon.org
 ****************************************************************************/

/*
 *  This file is part of Pracro.
 *
 *  Pracro is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  Pracro is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with Pracro; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA.
 */
#include "netcom.h"

#include <QtNetwork>

#include <QApplication>
#include <QByteArray>

#include <QHttp>

#include "widgets/widget.h"

#ifdef USE_SSL
#include <QMessageBox>
#include <QList>
#include <QSslError>
#include <QSslSocket>

#ifdef QT_NO_OPENSSL
#error "QT not compiled with SSL support."
#endif
#endif

NetCom::NetCom(QString host, quint16 port, QString user, QString cpr)
{
  this->user = user;
  this->cpr = cpr;

  connect(&http, SIGNAL(readyRead(const QHttpResponseHeader &)),
          this, SLOT(readyRead(const QHttpResponseHeader &)));
  connect(&http, SIGNAL(stateChanged(int)), this, SLOT(stateChanged(int)));

#ifdef USE_SSL
  connect(&http, SIGNAL(sslErrors(const QList<QSslError> &)),
          this, SLOT(sslError(const QList<QSslError> &)));
  http.setHost(host, QHttp::ConnectionModeHttps, port);
#else
  http.setHost(host, QHttp::ConnectionModeHttp, port);
#endif

  transfering = false;

  QHttpRequestHeader h("HTTP 1.1", "/");
  http.request(h, "");

  transfering = true;
  buffer = "";
  do {
    qApp->processEvents(QEventLoop::WaitForMoreEvents);
  } while(transfering);

  sessionid = http.lastResponse().value("SessionID");
  printf("SESSION ID: %s\n", sessionid.toStdString().c_str());
}

NetCom::~NetCom()
{
  QHttpRequestHeader h("HTTP 1.1", "/");
  h.setValue("SessionCommit", "");
  h.setValue("SessionID", sessionid);
  http.request(h, "");

  transfering = true;
  buffer = "";
  do {
    qApp->processEvents(QEventLoop::WaitForMoreEvents);
  } while(transfering);
}

QDomDocument NetCom::send(QString templ, QString macro, bool lockgui)
{
  if(lockgui && qApp->activeWindow()) qApp->activeWindow()->setEnabled(false);
  if(lockgui) QApplication::setOverrideCursor(QCursor(Qt::WaitCursor));

  QDomDocument doc;

  QDomProcessingInstruction header = doc.createProcessingInstruction("xml", "version='1.0' encoding='UTF-8'");
  doc.appendChild(header); 

  QDomElement pracro_elem = doc.createElement("pracro");
  pracro_elem.setAttribute("version", "1.0");
  pracro_elem.setAttribute("cpr", cpr);
  pracro_elem.setAttribute("user", user);
  doc.appendChild(pracro_elem);

  QDomElement request_elem = doc.createElement("request");
  request_elem.setAttribute("template", templ);
  if(macro != "") request_elem.setAttribute("macro", macro);
  pracro_elem.appendChild(request_elem);
 
  printf("\nSending request:\n%s", doc.toString().toStdString().c_str());

  QHttpRequestHeader h("HTTP 1.1", "/");
  h.setValue("SessionID", sessionid);
  http.request(h, doc.toByteArray());

  QDomDocument res_doc;
  transfering = true;
  buffer = "";
  do {
    qApp->processEvents(QEventLoop::WaitForMoreEvents);
  } while(transfering);
  res_doc.setContent(buffer);

  QDomElement elem = res_doc.documentElement();

  printf("\nRecieved request:\n%s", res_doc.toString().toStdString().c_str());

  if(lockgui) QApplication::restoreOverrideCursor();
  if(lockgui && qApp->activeWindow()) qApp->activeWindow()->setEnabled(true);

  return res_doc;
}

void NetCom::send(QVector< Widget* > widgets, QString templ, QString macro, QString version)
{
  QDomDocument doc;

  QDomProcessingInstruction header = doc.createProcessingInstruction("xml", "version='1.0' encoding='UTF-8'");
  doc.appendChild(header); 

  QDomElement pracro_elem = doc.createElement("pracro");
  pracro_elem.setAttribute("version", "1.0");
  pracro_elem.setAttribute("cpr", cpr);
  pracro_elem.setAttribute("user", user);
  doc.appendChild(pracro_elem);

  QDomElement commit_elem = doc.createElement("commit");
  commit_elem.setAttribute("template", templ);
  commit_elem.setAttribute("macro", macro);
  commit_elem.setAttribute("version", version);
  pracro_elem.appendChild(commit_elem);

  // Iterate the different entries, and append their results to the commit string
  QVector< Widget* >::iterator i = widgets.begin();
  while (i != widgets.end()) {
    Widget* w = *i;
    
    if(!w->isDisabled() && w->getName() != "") {
      QDomElement field_elem = doc.createElement("field");
      field_elem.setAttribute("name", w->getName());
      field_elem.setAttribute("value", w->getValue());
      commit_elem.appendChild(field_elem);
    }

    i++;
  }

  if(qApp->activeWindow()) qApp->activeWindow()->setEnabled(false);

  printf("\nSending commit:\n%s", doc.toString().toStdString().c_str());

  QHttpRequestHeader h("HTTP 1.1", "/");
  h.setValue("SessionID", sessionid);
  http.request(h, doc.toByteArray());

  transfering = true;
  buffer = "";
  do {
    qApp->processEvents(QEventLoop::WaitForMoreEvents);
  } while(transfering);

  QApplication::restoreOverrideCursor();
  if(qApp->activeWindow()) qApp->activeWindow()->setEnabled(true);
}

void NetCom::readyRead(const QHttpResponseHeader &)
{
  //  printf("STATE: readyRead\n");
  buffer += http.readAll();
}

void NetCom::stateChanged(int state)
{
  //  printf("STATE: %d\n", state);
  if(transfering && state == QHttp::Connected) transfering = false;
}

#ifdef USE_SSL
void NetCom::sslError(const QList<QSslError> &errlst)
{
  QList<QSslError>::const_iterator i = errlst.begin();
  while(i != errlst.end()) {
    QMessageBox::warning(qApp->activeWindow(), "SSL Error", i->errorString());
    i++;
  }
  http.ignoreSslErrors();
}
#endif