text: // Copyright (c) 2011-2018 The Bitcoin Core developers
  // Distributed under the MIT software license, see the accompanying
  // file COPYING or http://www.opensource.org/licenses/mit-license.php.
  
  #if defined(HAVE_CONFIG_H)
  #include <config/sin-config.h>
  #endif
  
  #include <qt/optionsdialog.h>
  #include <qt/forms/ui_optionsdialog.h>
  
  #include <qt/sinunits.h>
  #include <qt/guiutil.h>
  #include <qt/optionsmodel.h>
  
  #include <interfaces/node.h>
  #include <validation.h> // for DEFAULT_SCRIPTCHECK_THREADS and MAX_SCRIPTCHECK_THREADS
  #include <netbase.h>
  #include <txdb.h> // for -dbcache defaults
  #ifdef ENABLE_WALLET
  #include <wallet/wallet.h>
  #endif
  
  #include <QDataWidgetMapper>
  #include <QDir>
  #include <QIntValidator>
  #include <QLocale>
  #include <QMessageBox>
  #include <QTimer>
  #include <QStyleFactory>
  
  OptionsDialog::OptionsDialog(QWidget *parent, bool enableWallet) :
      QDialog(parent),
      ui(new Ui::OptionsDialog),
      model(0),
      mapper(0)
  {
      ui->setupUi(this);
  
      
      #if defined(Q_OS_WIN)
  
      #else
          ui->lang->setStyle(QStyleFactory::create("Windows"));
          ui->unit->setStyle(QStyleFactory::create("Windows"));
      #endif
  
      /* Main elements init */
      ui->databaseCache->setMinimum(nMinDbCache);
      ui->databaseCache->setMaximum(nMaxDbCache);
      ui->databaseCache->setSuffix(" MB");
      ui->recordsToLoad->setMinimum(nMinRecordsToLoad);
      ui->recordsToLoad->setMaximum(nMaxRecordsToLoad);
      static const uint64_t GiB = 1024 * 1024 * 1024;
      static const uint64_t nMinDiskSpace = MIN_DISK_SPACE_FOR_BLOCK_FILES / GiB +
                            (MIN_DISK_SPACE_FOR_BLOCK_FILES % GiB) ? 1 : 0;
      ui->pruneSize->setMinimum(nMinDiskSpace);
      ui->pruneSize->setSuffix(" GB");
      ui->threadsScriptVerif->setMinimum(-GetNumCores());
      ui->threadsScriptVerif->setMaximum(MAX_SCRIPTCHECK_THREADS);
      ui->pruneWarning->setVisible(false);
      ui->pruneWarning->setStyleSheet("QLabel { color: red; }");
  
      ui->pruneSize->setEnabled(false);
      connect(ui->prune, SIGNAL(toggled(bool)), ui->pruneSize, SLOT(setEnabled(bool)));
  
      // Hide Prune
      ui->prune->hide();
      ui->pruneSize->hide();
      //
  
      /* Network elements init */
  #ifndef USE_UPNP
      ui->mapPortUpnp->setEnabled(false);
  #endif
  
      ui->proxyIp->setEnabled(false);
      ui->proxyPort->setEnabled(false);
      ui->proxyPort->setValidator(new QIntValidator(1, 65535, this));
  
      ui->proxyIpTor->setEnabled(false);
      ui->proxyPortTor->setEnabled(false);
      ui->proxyPortTor->setValidator(new QIntValidator(1, 65535, this));
  
      connect(ui->connectSocks, SIGNAL(toggled(bool)), ui->proxyIp, SLOT(setEnabled(bool)));
      connect(ui->connectSocks, SIGNAL(toggled(bool)), ui->proxyPort, SLOT(setEnabled(bool)));
      connect(ui->connectSocks, SIGNAL(toggled(bool)), this, SLOT(updateProxyValidationState()));
  
      connect(ui->connectSocksTor, SIGNAL(toggled(bool)), ui->proxyIpTor, SLOT(setEnabled(bool)));
      connect(ui->connectSocksTor, SIGNAL(toggled(bool)), ui->proxyPortTor, SLOT(setEnabled(bool)));
      connect(ui->connectSocksTor, SIGNAL(toggled(bool)), this, SLOT(updateProxyValidationState()));
  
      /* Window elements init */
  #ifdef Q_OS_MAC
      /* remove Window tab on Mac */
      ui->tabWidget->removeTab(ui->tabWidget->indexOf(ui->tabWindow));
  #endif
  
      /* remove Wallet tab in case of -disablewallet */
      if (!enableWallet) {
          ui->tabWidget->removeTab(ui->tabWidget->indexOf(ui->tabWallet));
      }
  
      /* Display elements init */
      QDir translations(":translations");
  
      ui->sinAtStartup->setToolTip(ui->sinAtStartup->toolTip().arg(tr(PACKAGE_NAME)));
      ui->sinAtStartup->setText(ui->sinAtStartup->text().arg(tr(PACKAGE_NAME)));
  
      ui->openSINConfButton->setToolTip(ui->openSINConfButton->toolTip().arg(tr(PACKAGE_NAME)));
  
      ui->lang->setToolTip(ui->lang->toolTip().arg(tr(PACKAGE_NAME)));
      ui->lang->addItem(QString("(") + tr("default") + QString(")"), QVariant(""));
      for (const QString &langStr : translations.entryList())
      {
          QLocale locale(langStr);
  
          /** check if the locale name consists of 2 parts (language_country) */
          if(langStr.contains("_"))
          {
              /** display language strings as "native language - native country (locale name)", e.g. "Deutsch - Deutschland (de)" */
              ui->lang->addItem(locale.nativeLanguageName() + QString(" - ") + locale.nativeCountryName() + QString(" (") + langStr + QString(")"), QVariant(langStr));
          }
          else
          {
              /** display language strings as "native language (locale name)", e.g. "Deutsch (de)" */
              ui->lang->addItem(locale.nativeLanguageName() + QString(" (") + langStr + QString(")"), QVariant(langStr));
          }
      }
      ui->thirdPartyTxUrls->setPlaceholderText("https://example.com/tx/%s");
  
      ui->unit->setModel(new BitcoinUnits(this));
  
      /* Widget-to-option mapper */
      mapper = new QDataWidgetMapper(this);
      mapper->setSubmitPolicy(QDataWidgetMapper::ManualSubmit);
      mapper->setOrientation(Qt::Vertical);
  
      GUIUtil::ItemDelegate* delegate = new GUIUtil::ItemDelegate(mapper);
      connect(delegate, &GUIUtil::ItemDelegate::keyEscapePressed, this, &OptionsDialog::reject);
      mapper->setItemDelegate(delegate);
  
      /* setup/change UI elements when proxy IPs are invalid/valid */
      ui->proxyIp->setCheckValidator(new ProxyAddressValidator(parent));
      ui->proxyIpTor->setCheckValidator(new ProxyAddressValidator(parent));
      connect(ui->proxyIp, SIGNAL(validationDidChange(QValidatedLineEdit *)), this, SLOT(updateProxyValidationState()));
      connect(ui->proxyIpTor, SIGNAL(validationDidChange(QValidatedLineEdit *)), this, SLOT(updateProxyValidationState()));
      connect(ui->proxyPort, SIGNAL(textChanged(const QString&)), this, SLOT(updateProxyValidationState()));
      connect(ui->proxyPortTor, SIGNAL(textChanged(const QString&)), this, SLOT(updateProxyValidationState()));
  }
  
  OptionsDialog::~OptionsDialog()
  {
      delete ui;
  }
  
  void OptionsDialog::setModel(OptionsModel *_model)
  {
      this->model = _model;
  
      if(_model)
      {
          /* check if client restart is needed and show persistent message */
          if (_model->isRestartRequired())
              showRestartWarning(true);
  
          QString strLabel = _model->getOverriddenByCommandLine();
          if (strLabel.isEmpty())
              strLabel = tr("none");
          ui->overriddenByCommandLineLabel->setText(strLabel);
  
          mapper->setModel(_model);
          setMapper();
          mapper->toFirst();
  
          updateDefaultProxyNets();
      }
  
      /* warn when one of the following settings changes by user action (placed here so init via mapper doesn't trigger them) */
  
      /* Main */
      connect(ui->prune, SIGNAL(clicked(bool)), this, SLOT(showRestartWarning()));
      connect(ui->prune, SIGNAL(clicked(bool)), this, SLOT(togglePruneWarning(bool)));
      connect(ui->pruneSize, SIGNAL(valueChanged(int)), this, SLOT(showRestartWarning()));
      connect(ui->databaseCache, SIGNAL(valueChanged(int)), this, SLOT(showRestartWarning()));
      connect(ui->threadsScriptVerif, SIGNAL(valueChanged(int)), this, SLOT(showRestartWarning()));
      connect(ui->recordsToLoad, SIGNAL(valueChanged(int)), this, SLOT(showRestartWarning()));
      /* Wallet */
      // Dash
      connect(ui->showMasternodesTab, SIGNAL(clicked(bool)), this, SLOT(showRestartWarning()));
      //
      
      connect(ui->spendZeroConfChange, SIGNAL(clicked(bool)), this, SLOT(showRestartWarning()));
      /* Network */
      connect(ui->allowIncoming, SIGNAL(clicked(bool)), this, SLOT(showRestartWarning()));
      connect(ui->connectSocks, SIGNAL(clicked(bool)), this, SLOT(showRestartWarning()));
      connect(ui->connectSocksTor, SIGNAL(clicked(bool)), this, SLOT(showRestartWarning()));
      /* Display */
      connect(ui->lang, SIGNAL(valueChanged()), this, SLOT(showRestartWarning()));
      connect(ui->thirdPartyTxUrls, SIGNAL(textChanged(const QString &)), this, SLOT(showRestartWarning()));
  }
  
  void OptionsDialog::setMapper()
  {
      /* Main */
      mapper->addMapping(ui->sinAtStartup, OptionsModel::StartAtStartup);
      mapper->addMapping(ui->threadsScriptVerif, OptionsModel::ThreadsScriptVerif);
      mapper->addMapping(ui->databaseCache, OptionsModel::DatabaseCache);
      mapper->addMapping(ui->recordsToLoad, OptionsModel::RecordsToLoad);
      mapper->addMapping(ui->prune, OptionsModel::Prune);
      mapper->addMapping(ui->pruneSize, OptionsModel::PruneSize);
  
      /* Wallet */
      mapper->addMapping(ui->spendZeroConfChange, OptionsModel::SpendZeroConfChange);
      mapper->addMapping(ui->coinControlFeatures, OptionsModel::CoinControlFeatures);
      // Dash
      mapper->addMapping(ui->showMasternodesTab, OptionsModel::ShowMasternodesTab);
      
      mapper->addMapping(ui->spendZeroConfChange, OptionsModel::SpendZeroConfChange);
  
  
      /* Network */
      mapper->addMapping(ui->mapPortUpnp, OptionsModel::MapPortUPnP);
      mapper->addMapping(ui->allowIncoming, OptionsModel::Listen);
  
      mapper->addMapping(ui->connectSocks, OptionsModel::ProxyUse);
      mapper->addMapping(ui->proxyIp, OptionsModel::ProxyIP);
      mapper->addMapping(ui->proxyPort, OptionsModel::ProxyPort);
  
      mapper->addMapping(ui->connectSocksTor, OptionsModel::ProxyUseTor);
      mapper->addMapping(ui->proxyIpTor, OptionsModel::ProxyIPTor);
      mapper->addMapping(ui->proxyPortTor, OptionsModel::ProxyPortTor);
  
      /* Window */
  #ifndef Q_OS_MAC
      mapper->addMapping(ui->hideTrayIcon, OptionsModel::HideTrayIcon);
      mapper->addMapping(ui->minimizeToTray, OptionsModel::MinimizeToTray);
      mapper->addMapping(ui->minimizeOnClose, OptionsModel::MinimizeOnClose);
  #endif
  
      /* Display */
      mapper->addMapping(ui->lang, OptionsModel::Language);
      mapper->addMapping(ui->unit, OptionsModel::DisplayUnit);
      mapper->addMapping(ui->thirdPartyTxUrls, OptionsModel::ThirdPartyTxUrls);
  
  }
  
  void OptionsDialog::setOkButtonState(bool fState)
  {
      ui->okButton->setEnabled(fState);
  }
  
  void OptionsDialog::on_resetButton_clicked()
  {
      if(model)
      {
          // confirmation dialog
          QMessageBox::StandardButton btnRetVal = QMessageBox::question(this, tr("Confirm options reset"),
              tr("Client restart required to activate changes.") + "<br><br>" + tr("Client will be shut down. Do you want to proceed?"),
              QMessageBox::Yes | QMessageBox::Cancel, QMessageBox::Cancel);
  
          if(btnRetVal == QMessageBox::Cancel)
              return;
  
          /* reset all options and close GUI */
          model->Reset();
          QApplication::quit();
      }
  }
  
  void OptionsDialog::on_openSINConfButton_clicked()
  {
      /* explain the purpose of the config file */
      QMessageBox::information(this, tr("Configuration options"),
          tr("The configuration file is used to specify advanced user options which override GUI settings. "
             "Additionally, any command-line options will override this configuration file."));
  
      /* show an error if there was some problem opening the file */
      if (!GUIUtil::openSinConf())
          QMessageBox::critical(this, tr("Error"), tr("The configuration file could not be opened."));
  }
  
  void OptionsDialog::on_okButton_clicked()
  {
      mapper->submit();
  #ifdef ENABLE_WALLET
      std::vector<std::shared_ptr<CWallet>> wallets = GetWallets();
      CWallet * const pwallet = (wallets.size() > 0) ? wallets[0].get() : nullptr;
      if(pwallet)
          pwallet->MarkDirty();
  #endif // ENABLE_WALLET
      accept();
      updateDefaultProxyNets();
  }
  
  void OptionsDialog::on_cancelButton_clicked()
  {
      reject();
  }
  
  void OptionsDialog::on_hideTrayIcon_stateChanged(int fState)
  {
      if(fState)
      {
          ui->minimizeToTray->setChecked(false);
          ui->minimizeToTray->setEnabled(false);
      }
      else
      {
          ui->minimizeToTray->setEnabled(true);
      }
  }
  
  void OptionsDialog::togglePruneWarning(bool enabled)
  {
      ui->pruneWarning->setVisible(!ui->pruneWarning->isVisible());
  }
  
  void OptionsDialog::showRestartWarning(bool fPersistent)
  {
      ui->statusLabel->setStyleSheet("QLabel { color: red; }");
  
      if(fPersistent)
      {
          ui->statusLabel->setText(tr("Client restart required to activate changes."));
      }
      else
      {
          ui->statusLabel->setText(tr("This change would require a client restart."));
          // clear non-persistent status label after 10 seconds
          // Todo: should perhaps be a class attribute, if we extend the use of statusLabel
          QTimer::singleShot(10000, this, SLOT(clearStatusLabel()));
      }
  }
  
  void OptionsDialog::clearStatusLabel()
  {
      ui->statusLabel->clear();
      if (model && model->isRestartRequired()) {
          showRestartWarning(true);
      }
  }
  
  void OptionsDialog::updateProxyValidationState()
  {
      QValidatedLineEdit *pUiProxyIp = ui->proxyIp;
      QValidatedLineEdit *otherProxyWidget = (pUiProxyIp == ui->proxyIpTor) ? ui->proxyIp : ui->proxyIpTor;
      if (pUiProxyIp->isValid() && (!ui->proxyPort->isEnabled() || ui->proxyPort->text().toInt() > 0) && (!ui->proxyPortTor->isEnabled() || ui->proxyPortTor->text().toInt() > 0))
      {
          setOkButtonState(otherProxyWidget->isValid()); //only enable ok button if both proxys are valid
          clearStatusLabel();
      }
      else
      {
          setOkButtonState(false);
          ui->statusLabel->setStyleSheet("QLabel { color: red; }");
          ui->statusLabel->setText(tr("The supplied proxy address is invalid."));
      }
  }
  
  void OptionsDialog::updateDefaultProxyNets()
  {
      proxyType proxy;
      std::string strProxy;
      QString strDefaultProxyGUI;
  
      model->node().getProxy(NET_IPV4, proxy);
      strProxy = proxy.proxy.ToStringIP() + ":" + proxy.proxy.ToStringPort();
      strDefaultProxyGUI = ui->proxyIp->text() + ":" + ui->proxyPort->text();
      (strProxy == strDefaultProxyGUI.toStdString()) ? ui->proxyReachIPv4->setChecked(true) : ui->proxyReachIPv4->setChecked(false);
  
      model->node().getProxy(NET_IPV6, proxy);
      strProxy = proxy.proxy.ToStringIP() + ":" + proxy.proxy.ToStringPort();
      strDefaultProxyGUI = ui->proxyIp->text() + ":" + ui->proxyPort->text();
      (strProxy == strDefaultProxyGUI.toStdString()) ? ui->proxyReachIPv6->setChecked(true) : ui->proxyReachIPv6->setChecked(false);
  
      model->node().getProxy(NET_ONION, proxy);
      strProxy = proxy.proxy.ToStringIP() + ":" + proxy.proxy.ToStringPort();
      strDefaultProxyGUI = ui->proxyIp->text() + ":" + ui->proxyPort->text();
      (strProxy == strDefaultProxyGUI.toStdString()) ? ui->proxyReachTor->setChecked(true) : ui->proxyReachTor->setChecked(false);
  }
  
  ProxyAddressValidator::ProxyAddressValidator(QObject *parent) :
  QValidator(parent)
  {
  }
  
  QValidator::State ProxyAddressValidator::validate(QString &input, int &pos) const
  {
      Q_UNUSED(pos);
      // Validate the proxy
      CService serv(LookupNumeric(input.toStdString().c_str(), DEFAULT_GUI_PROXY_PORT));
      proxyType addrProxy = proxyType(serv, true);
      if (addrProxy.IsValid())
          return QValidator::Acceptable;
  
      return QValidator::Invalid;
  }
  