/**
 * This file is part of GPGFrontend.
 *
 * GPGFrontend 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 3 of the License, or
 * (at your option) any later version.
 *
 * Foobar 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 Foobar.  If not, see <https://www.gnu.org/licenses/>.
 *
 * The initial version of the source code is inherited from gpg4usb-team.
 * Their source code version also complies with GNU General Public License.
 *
 * The source code version of this software was modified and released
 * by Saturneric<eric@bktus.com> starting on May 12, 2021.
 *
 */

#include "ui/KeyUploadDialog.h"

#include <algorithm>

#include "gpg/function/GpgKeyGetter.h"
#include "gpg/function/GpgKeyImportExportor.h"

namespace GpgFrontend::UI {

KeyUploadDialog::KeyUploadDialog(const KeyIdArgsListPtr& keys_ids,
                                 QWidget* parent)
    : appPath(qApp->applicationDirPath()),
      settings(RESOURCE_DIR(appPath) + "/conf/gpgfrontend.ini",
               QSettings::IniFormat),
      mKeys(GpgKeyGetter::GetInstance().GetKeys(keys_ids)),
      QDialog(parent) {
  auto* pb = new QProgressBar();
  pb->setRange(0, 0);
  pb->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Preferred);
  pb->setTextVisible(false);

  auto* layout = new QVBoxLayout();
  layout->addWidget(pb);
  layout->setContentsMargins(0, 0, 0, 0);
  layout->setSpacing(0);
  this->setLayout(layout);

  this->setModal(true);
  this->setWindowTitle(tr("Uploading Public Key"));
  this->setFixedSize(240, 42);
}

void KeyUploadDialog::slotUpload() {
  auto out_data = std::make_unique<ByteArray>();
  GpgKeyImportExportor::GetInstance().ExportKeys(*mKeys, out_data);
  uploadKeyToServer(*out_data);
}

void KeyUploadDialog::uploadKeyToServer(
    const GpgFrontend::ByteArray& keys_data) {
  // set default keyserver
  QString keyserver = settings.value("keyserver/defaultKeyServer").toString();

  QUrl reqUrl(keyserver + "/pks/add");
  auto qnam = new QNetworkAccessManager(this);

  // Building Post Data
  QByteArray postData;

  auto data = std::string(keys_data);

  boost::algorithm::replace_all(data, "\n", "%0A");
  boost::algorithm::replace_all(data, "\r", "%0D");
  boost::algorithm::replace_all(data, "(", "%28");
  boost::algorithm::replace_all(data, ")", "%29");
  boost::algorithm::replace_all(data, "/", "%2F");
  boost::algorithm::replace_all(data, ":", "%3A");
  boost::algorithm::replace_all(data, "+", "%2B");
  boost::algorithm::replace_all(data, "=", "%3D");
  boost::algorithm::replace_all(data, " ", "+");

  QNetworkRequest request(reqUrl);
  request.setHeader(QNetworkRequest::ContentTypeHeader,
                    "application/x-www-form-urlencoded");

  postData.append("keytext").append("=").append(
      QString::fromStdString(data).toUtf8());

  // Send Post Data
  QNetworkReply* reply = qnam->post(request, postData);
  connect(reply, SIGNAL(finished()), this, SLOT(slotUploadFinished()));

  // Keep Waiting
  while (reply->isRunning()) {
    QApplication::processEvents();
  }

  // Done
  this->hide();
  this->close();
}

void KeyUploadDialog::slotUploadFinished() {
  auto* reply = qobject_cast<QNetworkReply*>(sender());

  QByteArray response = reply->readAll();
  qDebug() << "Response: " << response.data();

  auto error = reply->error();
  if (error != QNetworkReply::NoError) {
    qDebug() << "Error From Reply" << reply->errorString();
    QString message;
    switch (error) {
      case QNetworkReply::ContentNotFoundError:
        message = tr("Key Not Found");
        break;
      case QNetworkReply::TimeoutError:
        message = tr("Timeout");
        break;
      case QNetworkReply::HostNotFoundError:
        message = tr("Key Server Not Found");
        break;
      default:
        message = tr("Connection Error");
    }
    QMessageBox::critical(this, "Upload Failed", message);
    return;
  } else {
    QMessageBox::information(this, "Upload Success",
                             "Upload Public Key Successfully");
    qDebug() << "Success while contacting keyserver!";
  }
  reply->deleteLater();
}

}  // namespace GpgFrontend::UI