/**
 * Copyright (C) 2021-2024 Saturneric <eric@bktus.com>
 *
 * 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.
 *
 * GpgFrontend 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 GpgFrontend. If not, see <https://www.gnu.org/licenses/>.
 *
 * The initial version of the source code is inherited from
 * the gpg4usb project, which is under GPL-3.0-or-later.
 *
 * All the source code of GpgFrontend was modified and released by
 * Saturneric <eric@bktus.com> starting on May 12, 2021.
 *
 * SPDX-License-Identifier: GPL-3.0-or-later
 *
 */

#include "ui/thread/KeyServerImportTask.h"

#include "core/function/gpg/GpgKeyImportExporter.h"
#include "core/model/SettingsObject.h"
#include "core/utils/BuildInfoUtils.h"
#include "ui/struct/settings_object/KeyServerSO.h"

GpgFrontend::UI::KeyServerImportTask::KeyServerImportTask(
    QString keyserver_url, int channel, std::vector<QString> keyids)
    : Task("key_server_import_task"),
      keyserver_url_(std::move(keyserver_url)),
      current_gpg_context_channel_(channel),
      keyids_(std::move(keyids)),
      manager_(new QNetworkAccessManager(this)) {
  HoldOnLifeCycle(true);

  if (keyserver_url_.isEmpty()) {
    KeyServerSO key_server(SettingsObject("key_server"));
    keyserver_url_ = key_server.GetTargetServer();
  }
}

auto GpgFrontend::UI::KeyServerImportTask::Run() -> int {
  QUrl const keyserver_url = QUrl(keyserver_url_);
  for (const auto& key_id : keyids_) {
    QUrl const req_url(keyserver_url.scheme() + "://" + keyserver_url.host() +
                       "/pks/lookup?op=get&search=0x" + key_id + "&options=mr");

    auto request = QNetworkRequest(req_url);
    request.setHeader(QNetworkRequest::UserAgentHeader,
                      GetHttpRequestUserAgent());

    reply_ = manager_->get(request);
    connect(reply_, &QNetworkReply::finished, this,
            &KeyServerImportTask::dealing_reply_from_server);
  }
  return 0;
}

void GpgFrontend::UI::KeyServerImportTask::dealing_reply_from_server() {
  auto const network_reply = reply_->error();
  auto buffer = reply_->readAll();

  if (network_reply != QNetworkReply::NoError) {
    LOG_W() << "key import error, message from key server reply: " << buffer;

    QString err_msg;
    switch (network_reply) {
      case QNetworkReply::ContentNotFoundError:
        err_msg = tr("Key not found in the Keyserver.");
        break;
      case QNetworkReply::TimeoutError:
        err_msg = tr("Network connection timeout.");
        break;
      case QNetworkReply::HostNotFoundError:
        err_msg = tr("Cannot resolve the address of target key server.");
        break;
      default:
        err_msg = tr("General connection error occurred.");
    }
    emit SignalKeyServerImportResult(current_gpg_context_channel_, false,
                                     err_msg, buffer, nullptr);
  }

  auto info = GpgKeyImportExporter::GetInstance(current_gpg_context_channel_)
                  .ImportKey(GFBuffer(buffer));
  emit SignalKeyServerImportResult(current_gpg_context_channel_, true,
                                   tr("Success"), buffer, info);

  if (static_cast<size_t>(result_count_++) == keyids_.size() - 1) {
    emit SignalTaskShouldEnd(0);
  }
}