text: // Copyright (c) 2011-2014 The Bitcoin developers
  // Copyright (c) 2014-2015 The Dash developers
  // Distributed under the MIT/X11 software license, see the accompanying
  // file COPYING or http://www.opensource.org/licenses/mit-license.php.
  
  #if defined(HAVE_CONFIG_H)
  #include "masterbitcoin-config.h"
  #endif
  
  #include "optionsmodel.h"
  
  #include "bitcoinunits.h"
  #include "guiutil.h"
  
  #include "init.h"
  #include "main.h"
  #include "net.h"
  #include "txdb.h" // for -dbcache defaults
  #ifdef ENABLE_WALLET
  #include "wallet.h"
  #include "walletdb.h"
  #endif
  
  #include <QNetworkProxy>
  #include <QSettings>
  #include <QStringList>
  
  OptionsModel::OptionsModel(QObject *parent) :
      QAbstractListModel(parent)
  {
      Init();
  }
  
  void OptionsModel::addOverriddenOption(const std::string &option)
  {
      strOverriddenByCommandLine += QString::fromStdString(option) + "=" + QString::fromStdString(mapArgs[option]) + " ";
  }
  
  // Writes all missing QSettings with their default values
  void OptionsModel::Init()
  {
      QSettings settings;
  
      // Ensure restart flag is unset on client startup
      setRestartRequired(false);
  
      // These are Qt-only settings:
  
      // Window
      if (!settings.contains("fMinimizeToTray"))
          settings.setValue("fMinimizeToTray", false);
      fMinimizeToTray = settings.value("fMinimizeToTray").toBool();
  
      if (!settings.contains("fMinimizeOnClose"))
          settings.setValue("fMinimizeOnClose", false);
      fMinimizeOnClose = settings.value("fMinimizeOnClose").toBool();
  
      // Display
      if (!settings.contains("nDisplayUnit"))
          settings.setValue("nDisplayUnit", BitcoinUnits::MASTERBITCOIN);
      nDisplayUnit = settings.value("nDisplayUnit").toInt();
  
      if (!settings.contains("bDisplayAddresses"))
          settings.setValue("bDisplayAddresses", false);
      bDisplayAddresses = settings.value("bDisplayAddresses", false).toBool();
  
      if (!settings.contains("strThirdPartyTxUrls"))
          settings.setValue("strThirdPartyTxUrls", "");
      strThirdPartyTxUrls = settings.value("strThirdPartyTxUrls", "").toString();
  
      if (!settings.contains("fCoinControlFeatures"))
          settings.setValue("fCoinControlFeatures", false);
      fCoinControlFeatures = settings.value("fCoinControlFeatures", false).toBool();
  
      if (!settings.contains("nDarksendRounds"))
          settings.setValue("nDarksendRounds", 2);
  
      if (!settings.contains("nAnonymizeDarkcoinAmount"))
          settings.setValue("nAnonymizeDarkcoinAmount", 1000);
  
      nDarksendRounds = settings.value("nDarksendRounds").toLongLong();
      nAnonymizeDarkcoinAmount = settings.value("nAnonymizeDarkcoinAmount").toLongLong();
  
      // These are shared with the core or have a command-line parameter
      // and we want command-line parameters to overwrite the GUI settings.
      //
      // If setting doesn't exist create it with defaults.
      //
      // If SoftSetArg() or SoftSetBoolArg() return false we were overridden
      // by command-line and show this in the UI.
  
      // Main
      if (!settings.contains("nDatabaseCache"))
          settings.setValue("nDatabaseCache", (qint64)nDefaultDbCache);
      if (!SoftSetArg("-dbcache", settings.value("nDatabaseCache").toString().toStdString()))
          addOverriddenOption("-dbcache");
  
      if (!settings.contains("nThreadsScriptVerif"))
          settings.setValue("nThreadsScriptVerif", DEFAULT_SCRIPTCHECK_THREADS);
      if (!SoftSetArg("-par", settings.value("nThreadsScriptVerif").toString().toStdString()))
          addOverriddenOption("-par");
  
      // Wallet
  #ifdef ENABLE_WALLET
      if (!settings.contains("nTransactionFee"))
          settings.setValue("nTransactionFee", (qint64)DEFAULT_TRANSACTION_FEE);
      nTransactionFee = settings.value("nTransactionFee").toLongLong(); // if -paytxfee is set, this will be overridden later in init.cpp
      if (mapArgs.count("-paytxfee"))
          addOverriddenOption("-paytxfee");
  
      if (!settings.contains("bSpendZeroConfChange"))
          settings.setValue("bSpendZeroConfChange", true);
      if (!SoftSetBoolArg("-spendzeroconfchange", settings.value("bSpendZeroConfChange").toBool()))
          addOverriddenOption("-spendzeroconfchange");
  #endif
  
      // Network
      if (!settings.contains("fUseUPnP"))
  #ifdef USE_UPNP
          settings.setValue("fUseUPnP", true);
  #else
          settings.setValue("fUseUPnP", false);
  #endif
      if (!SoftSetBoolArg("-upnp", settings.value("fUseUPnP").toBool()))
          addOverriddenOption("-upnp");
  
      if (!settings.contains("fUseProxy"))
          settings.setValue("fUseProxy", false);
      if (!settings.contains("addrProxy"))
          settings.setValue("addrProxy", "127.0.0.1:9050");
      // Only try to set -proxy, if user has enabled fUseProxy
      if (settings.value("fUseProxy").toBool() && !SoftSetArg("-proxy", settings.value("addrProxy").toString().toStdString()))
          addOverriddenOption("-proxy");
      if (!settings.contains("nSocksVersion"))
          settings.setValue("nSocksVersion", 5);
      // Only try to set -socks, if user has enabled fUseProxy
      if (settings.value("fUseProxy").toBool() && !SoftSetArg("-socks", settings.value("nSocksVersion").toString().toStdString()))
          addOverriddenOption("-socks");
  
      // Display
      if (!settings.contains("theme"))
          settings.setValue("theme", "");
      if (!settings.contains("language"))
          settings.setValue("language", "");
      if (!SoftSetArg("-lang", settings.value("language").toString().toStdString()))
          addOverriddenOption("-lang");
  
      if (settings.contains("nDarksendRounds"))
          SoftSetArg("-darksendrounds", settings.value("nDarksendRounds").toString().toStdString());
      if (settings.contains("nAnonymizeDarkcoinAmount"))
          SoftSetArg("-anonymizemasterbitcoinamount", settings.value("nAnonymizeDarkcoinAmount").toString().toStdString());
  
      language = settings.value("language").toString();
  }
  
  void OptionsModel::Reset()
  {
      QSettings settings;
  
      // Remove all entries from our QSettings object
      settings.clear();
  
      // default setting for OptionsModel::StartAtStartup - disabled
      if (GUIUtil::GetStartOnSystemStartup())
          GUIUtil::SetStartOnSystemStartup(false);
  }
  
  int OptionsModel::rowCount(const QModelIndex & parent) const
  {
      return OptionIDRowCount;
  }
  
  // read QSettings values and return them
  QVariant OptionsModel::data(const QModelIndex & index, int role) const
  {
      if(role == Qt::EditRole)
      {
          QSettings settings;
          switch(index.row())
          {
          case StartAtStartup:
              return GUIUtil::GetStartOnSystemStartup();
          case MinimizeToTray:
              return fMinimizeToTray;
          case MapPortUPnP:
  #ifdef USE_UPNP
              return settings.value("fUseUPnP");
  #else
              return false;
  #endif
          case MinimizeOnClose:
              return fMinimizeOnClose;
  
          // default proxy
          case ProxyUse:
              return settings.value("fUseProxy", false);
          case ProxyIP: {
              // contains IP at index 0 and port at index 1
              QStringList strlIpPort = settings.value("addrProxy").toString().split(":", QString::SkipEmptyParts);
              return strlIpPort.at(0);
          }
          case ProxyPort: {
              // contains IP at index 0 and port at index 1
              QStringList strlIpPort = settings.value("addrProxy").toString().split(":", QString::SkipEmptyParts);
              return strlIpPort.at(1);
          }
          case ProxySocksVersion:
              return settings.value("nSocksVersion", 5);
  
  #ifdef ENABLE_WALLET
          case Fee:
              // Attention: Init() is called before nTransactionFee is set in AppInit2()!
              // To ensure we can change the fee on-the-fly update our QSetting when
              // opening OptionsDialog, which queries Fee via the mapper.
              if (nTransactionFee != settings.value("nTransactionFee").toLongLong())
                  settings.setValue("nTransactionFee", (qint64)nTransactionFee);
              // Todo: Consider to revert back to use just nTransactionFee here, if we don't want
              // -paytxfee to update our QSettings!
              return settings.value("nTransactionFee");
          case SpendZeroConfChange:
              return settings.value("bSpendZeroConfChange");
  #endif
          case DisplayUnit:
              return nDisplayUnit;
          case DisplayAddresses:
              return bDisplayAddresses;
          case ThirdPartyTxUrls:
              return strThirdPartyTxUrls;
          case Theme:
              return settings.value("theme");            
          case Language:
              return settings.value("language");
          case CoinControlFeatures:
              return fCoinControlFeatures;
          case DatabaseCache:
              return settings.value("nDatabaseCache");
          case ThreadsScriptVerif:
              return settings.value("nThreadsScriptVerif");
          case DarksendRounds:
              return QVariant(nDarksendRounds);
          case AnonymizeDarkcoinAmount:
              return QVariant(nAnonymizeDarkcoinAmount);
          default:
              return QVariant();
          }
      }
      return QVariant();
  }
  
  // write QSettings values
  bool OptionsModel::setData(const QModelIndex & index, const QVariant & value, int role)
  {
      bool successful = true; /* set to false on parse error */
      if(role == Qt::EditRole)
      {
          QSettings settings;
          switch(index.row())
          {
          case StartAtStartup:
              successful = GUIUtil::SetStartOnSystemStartup(value.toBool());
              break;
          case MinimizeToTray:
              fMinimizeToTray = value.toBool();
              settings.setValue("fMinimizeToTray", fMinimizeToTray);
              break;
          case MapPortUPnP: // core option - can be changed on-the-fly
              settings.setValue("fUseUPnP", value.toBool());
              MapPort(value.toBool());
              break;
          case MinimizeOnClose:
              fMinimizeOnClose = value.toBool();
              settings.setValue("fMinimizeOnClose", fMinimizeOnClose);
              break;
  
          // default proxy
          case ProxyUse:
              if (settings.value("fUseProxy") != value) {
                  settings.setValue("fUseProxy", value.toBool());
                  setRestartRequired(true);
              }
              break;
          case ProxyIP: {
              // contains current IP at index 0 and current port at index 1
              QStringList strlIpPort = settings.value("addrProxy").toString().split(":", QString::SkipEmptyParts);
              // if that key doesn't exist or has a changed IP
              if (!settings.contains("addrProxy") || strlIpPort.at(0) != value.toString()) {
                  // construct new value from new IP and current port
                  QString strNewValue = value.toString() + ":" + strlIpPort.at(1);
                  settings.setValue("addrProxy", strNewValue);
                  setRestartRequired(true);
              }
          }
          break;
          case ProxyPort: {
              // contains current IP at index 0 and current port at index 1
              QStringList strlIpPort = settings.value("addrProxy").toString().split(":", QString::SkipEmptyParts);
              // if that key doesn't exist or has a changed port
              if (!settings.contains("addrProxy") || strlIpPort.at(1) != value.toString()) {
                  // construct new value from current IP and new port
                  QString strNewValue = strlIpPort.at(0) + ":" + value.toString();
                  settings.setValue("addrProxy", strNewValue);
                  setRestartRequired(true);
              }
          }
          break;
          case ProxySocksVersion: {
              if (settings.value("nSocksVersion") != value) {
                  settings.setValue("nSocksVersion", value.toInt());
                  setRestartRequired(true);
              }
          }
          break;
  #ifdef ENABLE_WALLET
          case Fee: // core option - can be changed on-the-fly
              // Todo: Add is valid check  and warn via message, if not
              nTransactionFee = value.toLongLong();
              settings.setValue("nTransactionFee", (qint64)nTransactionFee);
              emit transactionFeeChanged(nTransactionFee);
              break;
          case SpendZeroConfChange:
              if (settings.value("bSpendZeroConfChange") != value) {
                  settings.setValue("bSpendZeroConfChange", value);
                  setRestartRequired(true);
              }
              break;
  #endif
          case DisplayUnit:
              nDisplayUnit = value.toInt();
              settings.setValue("nDisplayUnit", nDisplayUnit);
              emit displayUnitChanged(nDisplayUnit);
              break;
          case DisplayAddresses:
              bDisplayAddresses = value.toBool();
              settings.setValue("bDisplayAddresses", bDisplayAddresses);
              break;
          case ThirdPartyTxUrls:
              if (strThirdPartyTxUrls != value.toString()) {
                  strThirdPartyTxUrls = value.toString();
                  settings.setValue("strThirdPartyTxUrls", strThirdPartyTxUrls);
                  setRestartRequired(true);
              }
              break;
          case Theme:
              if (settings.value("theme") != value) {
                  settings.setValue("theme", value);
                  setRestartRequired(true);
              }
              break;            
          case Language:
              if (settings.value("language") != value) {
                  settings.setValue("language", value);
                  setRestartRequired(true);
              }
              break;
          case DarksendRounds:
              nDarksendRounds = value.toInt();
              settings.setValue("nDarksendRounds", nDarksendRounds);
              emit darksendRoundsChanged(nDarksendRounds);
              break;
          case AnonymizeDarkcoinAmount:
              nAnonymizeDarkcoinAmount = value.toInt();
              settings.setValue("nAnonymizeDarkcoinAmount", nAnonymizeDarkcoinAmount);
              emit anonymizeDarkcoinAmountChanged(nAnonymizeDarkcoinAmount);
              break;
          case CoinControlFeatures:
              fCoinControlFeatures = value.toBool();
              settings.setValue("fCoinControlFeatures", fCoinControlFeatures);
              emit coinControlFeaturesChanged(fCoinControlFeatures);
              break;
          case DatabaseCache:
              if (settings.value("nDatabaseCache") != value) {
                  settings.setValue("nDatabaseCache", value);
                  setRestartRequired(true);
              }
              break;
          case ThreadsScriptVerif:
              if (settings.value("nThreadsScriptVerif") != value) {
                  settings.setValue("nThreadsScriptVerif", value);
                  setRestartRequired(true);
              }
              break;
          default:
              break;
          }
      }
      emit dataChanged(index, index);
  
      return successful;
  }
  
  bool OptionsModel::getProxySettings(QNetworkProxy& proxy) const
  {
      // Directly query current base proxy, because
      // GUI settings can be overridden with -proxy.
      proxyType curProxy;
      if (GetProxy(NET_IPV4, curProxy)) {
          if (curProxy.second == 5) {
              proxy.setType(QNetworkProxy::Socks5Proxy);
              proxy.setHostName(QString::fromStdString(curProxy.first.ToStringIP()));
              proxy.setPort(curProxy.first.GetPort());
  
              return true;
          }
          else
              return false;
      }
      else
          proxy.setType(QNetworkProxy::NoProxy);
  
      return true;
  }
  
  void OptionsModel::setRestartRequired(bool fRequired)
  {
      QSettings settings;
      return settings.setValue("fRestartRequired", fRequired);
  }
  
  bool OptionsModel::isRestartRequired()
  {
      QSettings settings;
      return settings.value("fRestartRequired", false).toBool();
  }
  