text: #include "WalletManager.h"
  #include "Wallet.h"
  #include "wallet/wallet2_api.h"
  #include "zxcvbn-c/zxcvbn.h"
  #include "QRCodeImageProvider.h"
  #include <QFile>
  #include <QFileInfo>
  #include <QDir>
  #include <QDebug>
  #include <QUrl>
  #include <QtConcurrent/QtConcurrent>
  #include <QMutex>
  #include <QMutexLocker>
  #include <QString>
  
  WalletManager * WalletManager::m_instance = nullptr;
  
  WalletManager *WalletManager::instance()
  {
      if (!m_instance) {
          m_instance = new WalletManager;
      }
  
      return m_instance;
  }
  
  Wallet *WalletManager::createWallet(const QString &path, const QString &password,
                                      const QString &language, bool testnet)
  {
      QMutexLocker locker(&m_mutex);
      if (m_currentWallet) {
          qDebug() << "Closing open m_currentWallet" << m_currentWallet;
          delete m_currentWallet;
      }
      Shangcoin::Wallet * w = m_pimpl->createWallet(path.toStdString(), password.toStdString(),
                                                    language.toStdString(), testnet);
      m_currentWallet  = new Wallet(w);
      return m_currentWallet;
  }
  
  Wallet *WalletManager::openWallet(const QString &path, const QString &password, bool testnet)
  {
      QMutexLocker locker(&m_mutex);
      if (m_currentWallet) {
          qDebug() << "Closing open m_currentWallet" << m_currentWallet;
          delete m_currentWallet;
      }
      qDebug("%s: opening wallet at %s, testnet = %d ",
             __PRETTY_FUNCTION__, qPrintable(path), testnet);
  
      Shangcoin::Wallet * w =  m_pimpl->openWallet(path.toStdString(), password.toStdString(), testnet);
      qDebug("%s: opened wallet: %s, status: %d", __PRETTY_FUNCTION__, w->address().c_str(), w->status());
      m_currentWallet  = new Wallet(w);
  
      // move wallet to the GUI thread. Otherwise it wont be emitting signals
      if (m_currentWallet->thread() != qApp->thread()) {
          m_currentWallet->moveToThread(qApp->thread());
      }
  
      return m_currentWallet;
  }
  
  void WalletManager::openWalletAsync(const QString &path, const QString &password, bool testnet)
  {
      QFuture<Wallet*> future = QtConcurrent::run(this, &WalletManager::openWallet,
                                          path, password, testnet);
      QFutureWatcher<Wallet*> * watcher = new QFutureWatcher<Wallet*>();
  
      connect(watcher, &QFutureWatcher<Wallet*>::finished,
              this, [this, watcher]() {
          QFuture<Wallet*> future = watcher->future();
          watcher->deleteLater();
          emit walletOpened(future.result());
      });
      watcher->setFuture(future);
  }
  
  
  Wallet *WalletManager::recoveryWallet(const QString &path, const QString &memo, bool testnet, quint64 restoreHeight)
  {
      QMutexLocker locker(&m_mutex);
      if (m_currentWallet) {
          qDebug() << "Closing open m_currentWallet" << m_currentWallet;
          delete m_currentWallet;
      }
      Shangcoin::Wallet * w = m_pimpl->recoveryWallet(path.toStdString(), memo.toStdString(), testnet, restoreHeight);
      m_currentWallet = new Wallet(w);
      return m_currentWallet;
  }
  
  Wallet *WalletManager::createWalletFromKeys(const QString &path, const QString &language, bool testnet,
                                              const QString &address, const QString &viewkey, const QString &spendkey,
                                              quint64 restoreHeight)
  {
      QMutexLocker locker(&m_mutex);
      if (m_currentWallet) {
          qDebug() << "Closing open m_currentWallet" << m_currentWallet;
          delete m_currentWallet;
          m_currentWallet = NULL;
      }
      Shangcoin::Wallet * w = m_pimpl->createWalletFromKeys(path.toStdString(), language.toStdString(), testnet, restoreHeight,
                                                         address.toStdString(), viewkey.toStdString(), spendkey.toStdString());
      m_currentWallet = new Wallet(w);
      return m_currentWallet;
  }
  
  
  QString WalletManager::closeWallet()
  {
      QMutexLocker locker(&m_mutex);
      QString result;
      if (m_currentWallet) {
          result = m_currentWallet->address();
          delete m_currentWallet;
      } else {
          qCritical() << "Trying to close non existing wallet " << m_currentWallet;
          result = "0";
      }
      return result;
  }
  
  void WalletManager::closeWalletAsync()
  {
      QFuture<QString> future = QtConcurrent::run(this, &WalletManager::closeWallet);
      QFutureWatcher<QString> * watcher = new QFutureWatcher<QString>();
  
      connect(watcher, &QFutureWatcher<QString>::finished,
              this, [this, watcher]() {
         QFuture<QString> future = watcher->future();
         watcher->deleteLater();
         emit walletClosed(future.result());
      });
      watcher->setFuture(future);
  }
  
  bool WalletManager::walletExists(const QString &path) const
  {
      return m_pimpl->walletExists(path.toStdString());
  }
  
  QStringList WalletManager::findWallets(const QString &path)
  {
      std::vector<std::string> found_wallets = m_pimpl->findWallets(path.toStdString());
      QStringList result;
      for (const auto &w : found_wallets) {
          result.append(QString::fromStdString(w));
      }
      return result;
  }
  
  QString WalletManager::errorString() const
  {
      return tr("Unknown error");
  }
  
  bool WalletManager::moveWallet(const QString &src, const QString &dst)
  {
      return true;
  }
  
  
  QString WalletManager::walletLanguage(const QString &locale)
  {
      return "English";
  }
  
  quint64 WalletManager::maximumAllowedAmount() const
  {
      return Shangcoin::Wallet::maximumAllowedAmount();
  }
  
  QString WalletManager::maximumAllowedAmountAsSting() const
  {
      return WalletManager::displayAmount(WalletManager::maximumAllowedAmount());
  }
  
  
  
  QString WalletManager::displayAmount(quint64 amount) const
  {
      return QString::fromStdString(Shangcoin::Wallet::displayAmount(amount));
  }
  
  quint64 WalletManager::amountFromString(const QString &amount) const
  {
      return Shangcoin::Wallet::amountFromString(amount.toStdString());
  }
  
  quint64 WalletManager::amountFromDouble(double amount) const
  {
      return Shangcoin::Wallet::amountFromDouble(amount);
  }
  
  bool WalletManager::paymentIdValid(const QString &payment_id) const
  {
      return Shangcoin::Wallet::paymentIdValid(payment_id.toStdString());
  }
  
  bool WalletManager::addressValid(const QString &address, bool testnet) const
  {
      return Shangcoin::Wallet::addressValid(address.toStdString(), testnet);
  }
  
  bool WalletManager::keyValid(const QString &key, const QString &address, bool isViewKey,  bool testnet) const
  {
      std::string error;
      if(!Shangcoin::Wallet::keyValid(key.toStdString(), address.toStdString(), isViewKey, testnet, error)){
          qDebug() << QString::fromStdString(error);
          return false;
      }
      return true;
  }
  
  QString WalletManager::paymentIdFromAddress(const QString &address, bool testnet) const
  {
      return QString::fromStdString(Shangcoin::Wallet::paymentIdFromAddress(address.toStdString(), testnet));
  }
  
  QString WalletManager::checkPayment(const QString &address, const QString &txid, const QString &txkey, const QString &daemon_address) const
  {
      uint64_t received = 0, height = 0;
      std::string error = "";
      bool ret = m_pimpl->checkPayment(address.toStdString(), txid.toStdString(), txkey.toStdString(), daemon_address.toStdString(), received, height, error);
      // bypass qml being unable to pass structures without preposterous complexity
      std::string result = std::string(ret ? "true" : "false") + "|" + QString::number(received).toStdString() + "|" + QString::number(height).toStdString() + "|" + error;
      return QString::fromStdString(result);
  }
  
  void WalletManager::setDaemonAddress(const QString &address)
  {
      m_pimpl->setDaemonAddress(address.toStdString());
  }
  
  bool WalletManager::connected() const
  {
      return m_pimpl->connected();
  }
  
  quint64 WalletManager::networkDifficulty() const
  {
      return m_pimpl->networkDifficulty();
  }
  
  quint64 WalletManager::blockchainHeight() const
  {
      return m_pimpl->blockchainHeight();
  }
  
  quint64 WalletManager::blockchainTargetHeight() const
  {
      return m_pimpl->blockchainTargetHeight();
  }
  
  double WalletManager::miningHashRate() const
  {
      return m_pimpl->miningHashRate();
  }
  
  bool WalletManager::isMining() const
  {
      if(!m_currentWallet->connected())
          return false;
      return m_pimpl->isMining();
  }
  
  bool WalletManager::startMining(const QString &address, quint32 threads, bool backgroundMining, bool ignoreBattery)
  {
      if(threads == 0)
          threads = 1;
      return m_pimpl->startMining(address.toStdString(), threads, backgroundMining, ignoreBattery);
  }
  
  bool WalletManager::stopMining()
  {
      return m_pimpl->stopMining();
  }
  
  QString WalletManager::resolveOpenAlias(const QString &address) const
  {
      bool dnssec_valid = false;
      std::string res = m_pimpl->resolveOpenAlias(address.toStdString(), dnssec_valid);
      res = std::string(dnssec_valid ? "true" : "false") + "|" + res;
      return QString::fromStdString(res);
  }
  bool WalletManager::parse_uri(const QString &uri, QString &address, QString &payment_id, uint64_t &amount, QString &tx_description, QString &recipient_name, QVector<QString> &unknown_parameters, QString &error)
  {
      if (m_currentWallet)
          return m_currentWallet->parse_uri(uri, address, payment_id, amount, tx_description, recipient_name, unknown_parameters, error);
      return false;
  }
  
  void WalletManager::setLogLevel(int logLevel)
  {
      Shangcoin::WalletManagerFactory::setLogLevel(logLevel);
  }
  
  void WalletManager::setLogCategories(const QString &categories)
  {
      Shangcoin::WalletManagerFactory::setLogCategories(categories.toStdString());
  }
  
  QString WalletManager::urlToLocalPath(const QUrl &url) const
  {
      return QDir::toNativeSeparators(url.toLocalFile());
  }
  
  QUrl WalletManager::localPathToUrl(const QString &path) const
  {
      return QUrl::fromLocalFile(path);
  }
  
  double WalletManager::getPasswordStrength(const QString &password) const
  {
      static const char *local_dict[] = {
          "shangcoin", "fluffypony", NULL
      };
  
      if (!ZxcvbnInit("zxcvbn.dict")) {
          fprintf(stderr, "Failed to open zxcvbn.dict\n");
          return 0.0;
      }
      double e = ZxcvbnMatch(password.toStdString().c_str(), local_dict, NULL);
      ZxcvbnUnInit();
      return e;
  }
  
  bool WalletManager::saveQrCode(const QString &code, const QString &path) const
  {
      QSize size;
      // 240 <=> mainLayout.qrCodeSize (Receive.qml)
      return QRCodeImageProvider::genQrImage(code, &size).scaled(size.expandedTo(QSize(240, 240)), Qt::KeepAspectRatio).save(path, "PNG", 100);
  }
  
  void WalletManager::checkUpdatesAsync(const QString &software, const QString &subdir) const
  {
      QFuture<QString> future = QtConcurrent::run(this, &WalletManager::checkUpdates,
                                          software, subdir);
      QFutureWatcher<QString> * watcher = new QFutureWatcher<QString>();
      connect(watcher, &QFutureWatcher<Wallet*>::finished,
              this, [this, watcher]() {
          QFuture<QString> future = watcher->future();
          watcher->deleteLater();
          qDebug() << "Checking for updates - done";
          emit checkUpdatesComplete(future.result());
      });
      watcher->setFuture(future);
  }
  
  
  
  QString WalletManager::checkUpdates(const QString &software, const QString &subdir) const
  {
    qDebug() << "Checking for updates";
    const std::tuple<bool, std::string, std::string, std::string, std::string> result = Shangcoin::WalletManager::checkUpdates(software.toStdString(), subdir.toStdString());
    if (!std::get<0>(result))
      return QString("");
    return QString::fromStdString(std::get<1>(result) + "|" + std::get<2>(result) + "|" + std::get<3>(result) + "|" + std::get<4>(result));
  }
  
  bool WalletManager::clearWalletCache(const QString &wallet_path) const
  {
  
      QString fileName = wallet_path;
      // Make sure wallet file is not .keys
      fileName.replace(".keys","");
      QFile walletCache(fileName);
      QString suffix = ".old_cache";
      QString newFileName = fileName + suffix;
  
      // create unique file name
      for (int i = 1; QFile::exists(newFileName); i++) {
         newFileName = QString("%1%2.%3").arg(fileName).arg(suffix).arg(i);
      }
  
      return walletCache.rename(newFileName);
  }
  
  WalletManager::WalletManager(QObject *parent) : QObject(parent)
  {
      m_pimpl =  Shangcoin::WalletManagerFactory::getWalletManager();
  }
  