/**
 * Copyright (C) 2021 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 "SettingsDialog.h"

#include "core/GpgConstants.h"
#include "core/GpgModel.h"
#include "core/function/GlobalSettingStation.h"
#include "ui/dialog/settings/SettingsAppearance.h"
#include "ui/dialog/settings/SettingsGeneral.h"
#include "ui/dialog/settings/SettingsKeyServer.h"
#include "ui/dialog/settings/SettingsNetwork.h"
#include "ui/main_window/MainWindow.h"

namespace GpgFrontend::UI {

SettingsDialog::SettingsDialog(QWidget* parent)
    : GeneralDialog(typeid(SettingsDialog).name(), parent) {
  tab_widget_ = new QTabWidget();
  general_tab_ = new GeneralTab();
  appearance_tab_ = new AppearanceTab();
  key_server_tab_ = new KeyserverTab();
  network_tab_ = new NetworkTab();

  auto* main_layout = new QVBoxLayout();
  main_layout->addWidget(tab_widget_);
  main_layout->stretch(0);

  tab_widget_->addTab(general_tab_, _("General"));
  tab_widget_->addTab(appearance_tab_, _("Appearance"));
  tab_widget_->addTab(key_server_tab_, _("Key Server"));
  tab_widget_->addTab(network_tab_, _("Network"));

#ifndef MACOS
  button_box_ =
      new QDialogButtonBox(QDialogButtonBox::Ok | QDialogButtonBox::Cancel);
  connect(button_box_, &QDialogButtonBox::accepted, this,
          &SettingsDialog::SlotAccept);
  connect(button_box_, &QDialogButtonBox::rejected, this,
          &SettingsDialog::reject);
  mainLayout->addWidget(button_box_);
  mainLayout->stretch(0);
  setWindowTitle(_("Settings"));
#else
  connect(this, &QDialog::finished, this, &SettingsDialog::SlotAccept);
  connect(this, &QDialog::finished, this, &SettingsDialog::deleteLater);
  setWindowTitle(_("Preference"));
#endif

  setLayout(main_layout);

  // slots for handling the restart needed member
  this->slot_set_restart_needed(0);

  // restart ui
  connect(general_tab_, &GeneralTab::SignalRestartNeeded, this,
          [=](bool needed) {
            if (needed && restart_needed_ < kRestartCode) {
              this->restart_needed_ = kRestartCode;
            }
          });

  // restart core and ui
  connect(general_tab_, &GeneralTab::SignalDeepRestartNeeded, this,
          [=](bool needed) {
            if (needed && restart_needed_ < kDeepRestartCode) {
              this->restart_needed_ = kDeepRestartCode;
            }
          });

  // announce main window
  connect(this, &SettingsDialog::SignalRestartNeeded,
          qobject_cast<MainWindow*>(parent), &MainWindow::SlotSetRestartNeeded);

  this->setMinimumSize(480, 680);
  this->adjustSize();
  this->show();
}

auto SettingsDialog::get_restart_needed() const -> int {
  return this->restart_needed_;
}

void SettingsDialog::slot_set_restart_needed(int mode) {
  this->restart_needed_ = mode;
}

void SettingsDialog::SlotAccept() {
  general_tab_->ApplySettings();
  appearance_tab_->ApplySettings();
  key_server_tab_->ApplySettings();
  network_tab_->ApplySettings();

  // write settings to filesystem
  GlobalSettingStation::GetInstance().SyncSettings();

  GF_UI_LOG_DEBUG("restart needed: {}", get_restart_needed());
  if (get_restart_needed() != 0) {
    emit SignalRestartNeeded(get_restart_needed());
  }
  close();
}

auto SettingsDialog::ListLanguages() -> QHash<QString, QString> {
  QHash<QString, QString> languages;

  languages.insert(QString(), _("System Default"));

  auto locale_path = GlobalSettingStation::GetInstance().GetLocaleDir();

  auto locale_dir = QDir(QString::fromStdString(locale_path.string()));
  QStringList file_names = locale_dir.entryList(QStringList("*"));

  for (const auto& locale : file_names) {
    GF_UI_LOG_DEBUG("get locale from locale directory: {}",
                    locale.toStdString());
    if (locale == "." || locale == "..") continue;

    QLocale const q_locale(locale);
    if (q_locale.nativeCountryName().isEmpty()) continue;

    auto language = q_locale.nativeLanguageName() + " (" + locale + ")";
    languages.insert(locale, language);
  }
  return languages;
}

}  // namespace GpgFrontend::UI