/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/**
 * Copyright (c) 2013-2017, Regents of the University of California,
 *
 * This file is part of NFD Control Center.  See AUTHORS.md for complete list of NFD
 * authors and contributors.
 *
 * NFD Control Center 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.
 *
 * NFD Control Center 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 NFD
 * Control Center, e.g., in COPYING.md file.  If not, see <http://www.gnu.org/licenses/>.
 */

#include "tray-menu.hpp"
#include "tray-menu.moc"

#include <ndn-cxx/face.hpp>
#include <ndn-cxx/interest.hpp>

#ifdef OSX_BUILD
#define CONNECT_ICON ":/res/icon-connected-black.png"
#define DISCONNECT_ICON ":/res/icon-disconnected-black.png"

#include <Security/Authorization.h>
#include <Security/AuthorizationTags.h>
#else
#define CONNECT_ICON ":/res/icon-connected-white.png"
#define DISCONNECT_ICON ":/res/icon-disconnected-white.png"
#endif // OSX_BUILD

namespace ndn {
namespace ncc {

TrayMenu::TrayMenu(QQmlContext* context, Face& face)
  : m_context(context)
  , m_isNfdRunning(false)
  , m_menu(new QMenu(this))
  , m_entryPref(new QAction("Preferences...", m_menu))
  , m_entrySec(new QAction("Security...", m_menu))
  , m_acProc(new QProcess())
  , m_settings(new QSettings())
#ifdef OSX_BUILD
  , m_entryEnableCli(new QAction("Enable Command Terminal Usage...", m_menu))
  , m_checkForUpdates(new QAction("Check for updates", m_menu))
  , m_sparkle("https://irl.cs.ucla.edu/~cawka/ndn-control-center.xml")
#endif
  , m_entryQuit(new QAction("Quit", m_menu))
  , m_keyViewerDialog(new ncc::KeyViewerDialog)
  , m_face(face)
{
  connect(m_entryPref, SIGNAL(triggered()), this, SIGNAL(showApp()));
  connect(this, SIGNAL(showApp()), this, SLOT(showPref()));
  connect(m_entrySec, SIGNAL(triggered()), m_keyViewerDialog, SLOT(present()));
  connect(m_entryQuit, SIGNAL(triggered()), this, SLOT(quitApp()));

  connect(this, SIGNAL(nfdActivityUpdate(bool)), this, SLOT(updateNfdActivityIcon(bool)),
          Qt::QueuedConnection);

  m_context->setContextProperty("startStopButtonText", QVariant::fromValue(QString("Start NFD")));
  m_context->setContextProperty("acText", QVariant::fromValue(QString("")));

  m_menu->addAction(m_entryPref);
  m_menu->addAction(m_entrySec);
#ifdef OSX_BUILD
  connect(m_entryEnableCli, SIGNAL(triggered()), this, SLOT(enableCli()));
  m_menu->addAction(m_entryEnableCli);

  connect(m_checkForUpdates, SIGNAL(triggered()), this, SLOT(checkForUpdates()));
  m_menu->addAction(m_checkForUpdates);
#endif
  m_menu->addAction(m_entryQuit);
  m_tray = new QSystemTrayIcon(this);
  m_tray->setContextMenu(m_menu);
  connect(m_tray, SIGNAL(activated(QSystemTrayIcon::ActivationReason)),
          this, SLOT(iconActivated(QSystemTrayIcon::ActivationReason)));
  m_tray->setIcon(QIcon(DISCONNECT_ICON));
  m_tray->show();
  if (isAutoConfigEnabled()) {
    stopAutoConfig(); // Make sure no more than one auto-config process exist
    QTimer* mTimer = new QTimer(this);
    mTimer->setSingleShot(true);
    connect(mTimer, SIGNAL(timeout()), SLOT(startAutoConfig()));
    mTimer->start(2000);
  }
}

TrayMenu::~TrayMenu()
{
}

void
TrayMenu::appendMsg(QString &target, QString source)
{
  int maxLine = 100; // Max line that will show in auto-config status tab view
  if (target.count(QString("\n")) > maxLine) { // Only when target QString has more line than maxLine, it needs remove line
    int end = target.indexOf(QString("\n"));
    target.remove(0, end + 1); // Remove the first line of target
  }
  target.append(source);
}

void
TrayMenu::showPref()
{
  m_context->setContextProperty("acText", QVariant::fromValue(m_autoConfigMsg)); // Update auto-config status tab view
}

void
TrayMenu::processOutput()
{
  std::string msg = m_acProc->readAllStandardOutput().toStdString();
  if (msg != "") {
    appendMsg(m_autoConfigMsg, QString::fromStdString(msg));
  }
  msg = m_acProc->readAllStandardError().toStdString();
  if (msg != "") {
    appendMsg(m_autoConfigMsg, QString::fromStdString(msg));
  }
  m_context->setContextProperty("acText", QVariant::fromValue(m_autoConfigMsg));
}

Q_INVOKABLE bool
TrayMenu::isAutoConfigEnabled()
{
  bool sAutoConfig = m_settings.value("main/auto-config", QVariant(false)).toBool();
  return sAutoConfig;
}

void
TrayMenu::startAutoConfig()
{
  if (m_isNfdRunning) {
    appendMsg(m_autoConfigMsg, QString("NDN auto configuration will start...\n"));
    connect(m_acProc, SIGNAL(readyReadStandardOutput()), this, SLOT(processOutput()));
    connect(m_acProc, SIGNAL(readyReadStandardError()), this, SLOT(processOutput()));
    m_acProc->start((QCoreApplication::applicationDirPath().toStdString() + "/../Platform/ndn-autoconfig").c_str(),
                      QStringList()
                        << "--daemon");
  }
}

void
TrayMenu::stopAutoConfig()
{
#ifdef OSX_BUILD
  QProcess* proc = new QProcess();
  connect(proc, SIGNAL(finished(int)), proc, SLOT(deleteLater()));
  proc->startDetached("killall", QStringList() << "ndn-autoconfig");
#endif
}

Q_INVOKABLE void
TrayMenu::startStopAutoConfig(bool autoConfig)
{
  if (m_isNfdRunning) {
    if (autoConfig) {
      stopAutoConfig(); // Make sure no more than one auto-config process exist
      QTimer* mTimer = new QTimer(this);
      mTimer->setSingleShot(true);
      connect(mTimer, SIGNAL(timeout()), SLOT(startAutoConfig()));
      mTimer->start(2000);
      m_context->setContextProperty("acText", QVariant::fromValue(m_autoConfigMsg));
      m_settings.setValue("main/auto-config", true);
    }
    else {
      stopAutoConfig();
      appendMsg(m_autoConfigMsg, QString("NDN auto configuration will be stopped!\n"));
      m_context->setContextProperty("acText", QVariant::fromValue(m_autoConfigMsg));
      m_settings.setValue("main/auto-config", false);
    }
  }
  else { // No need to start or stop auto-config when NFD is not running, but it needs to update settings
    if (autoConfig) {
      m_settings.setValue("main/auto-config", true);
    }
    else {
      m_settings.setValue("main/auto-config", false);
    }
  }
}

void
TrayMenu::quitApp()
{
  QCoreApplication::exit(0);
}

void
TrayMenu::iconActivated(QSystemTrayIcon::ActivationReason reason)
{
  switch (reason) {
  // case QSystemTrayIcon::Trigger:
  //   emit showApp();
  //   break;
  case QSystemTrayIcon::Context:
    break;
  default:
    break;
  }
}

Q_INVOKABLE void
TrayMenu::startStopNfd(bool autoConfig)
{
  if (!m_isNfdRunning) {
    startNfd();
    if (autoConfig) {
      stopAutoConfig(); // Make sure no more than one auto-config process exist
      QTimer* mTimer = new QTimer(this);
      mTimer->setSingleShot(true);
      connect(mTimer, SIGNAL(timeout()), SLOT(startAutoConfig()));
      mTimer->start(2000);
      m_context->setContextProperty("acText", QVariant::fromValue(m_autoConfigMsg));
    }
  }
  else {
    stopNfd();
    stopAutoConfig();
    appendMsg(m_autoConfigMsg, QString("NDN auto configuration will be stopped!\n"));
    m_context->setContextProperty("acText", QVariant::fromValue(m_autoConfigMsg));
  }
}

void
TrayMenu::startNfd()
{
#ifdef OSX_BUILD
  QProcess* proc = new QProcess();
  connect(proc, SIGNAL(finished(int)), proc, SLOT(deleteLater()));
  proc->startDetached((QCoreApplication::applicationDirPath().toStdString() + "/../Platform/nfd").c_str(),
                      QStringList()
                        << "--config"
                        << (QCoreApplication::applicationDirPath().toStdString() + "/../etc/ndn/nfd.conf").c_str());


  // #endif
  //   QProcess * proc = new QProcess();
  //   connect(proc, SIGNAL(finished(int)), proc, SLOT(deleteLater()));
  // #ifdef __linux__
  //   proc->start("gksudo", QStringList() << NFD_START_COMMAND);
  // #else
  //   proc->start("osascript", QStringList()
  //               << "-e"
  //               << "do shell script \"" NFD_START_COMMAND "\" with administrator privileges");
#endif
}

void
TrayMenu::stopNfd()
{
#ifdef OSX_BUILD
  QProcess* proc = new QProcess();
  connect(proc, SIGNAL(finished(int)), proc, SLOT(deleteLater()));
  proc->startDetached("killall", QStringList() << "nfd");
#endif
}

Q_INVOKABLE void
TrayMenu::addDeleteRoute()
{
  addRoute();
}

Q_INVOKABLE void
TrayMenu::addRoute()
{
  std::cout << "Adding route" << std::endl;
  QString cmd = "nfdc register /test tcp4://localhost";
  QProcess *addNewRoute = new QProcess();
  connect(addNewRoute,SIGNAL(finished(int)), addNewRoute, SLOT(deleteLater()));
  addNewRoute->start("bash", QStringList() << "-c" << cmd);
  std::cout << "Done" << std::endl;
}

void
TrayMenu::deleteRoute()
{
  std::cout << "Deleting route" << std::endl;
  QString cmd = "nfdc unregister /test tcp4://localhost";
  QProcess *addNewRoute = new QProcess();
  connect(addNewRoute,SIGNAL(finished(int)), addNewRoute, SLOT(deleteLater()));
  addNewRoute->start("bash", QStringList() << "-c" << cmd);
  std::cout << "Done" << std::endl;
}

void
TrayMenu::updateNfdActivityIcon(bool isActive)
{
  m_isNfdRunning = isActive;

  if (isActive) {
    m_tray->setIcon(QIcon(CONNECT_ICON));
    m_context->setContextProperty("startStopButtonText", QVariant::fromValue(QString("Stop NFD")));
  }
  else {
    m_tray->setIcon(QIcon(DISCONNECT_ICON));
    m_context->setContextProperty("startStopButtonText", QVariant::fromValue(QString("Start NFD")));
  }
}

void
TrayMenu::enableCli()
{
#ifdef OSX_BUILD
  AuthorizationRef authorizationRef;
  OSStatus status = AuthorizationCreate(NULL, kAuthorizationEmptyEnvironment,
                                        kAuthorizationFlagDefaults, &authorizationRef);
  if (status != errAuthorizationSuccess)
    return;

  AuthorizationItem item = { kAuthorizationRightExecute, 0, 0, 0 };
  AuthorizationRights rights = { 1, &item };
  const AuthorizationFlags flags = kAuthorizationFlagDefaults | kAuthorizationFlagInteractionAllowed
    | kAuthorizationFlagPreAuthorize | kAuthorizationFlagExtendRights;

  status = AuthorizationCopyRights(authorizationRef, &rights, kAuthorizationEmptyEnvironment,
                                   flags, 0);
  if (status != errAuthorizationSuccess)
    return;

  char const* mkdir_arg[] = { "-p", "/usr/local/bin", nullptr };
  char const* mkdir = "/bin/mkdir";
  AuthorizationExecuteWithPrivileges(authorizationRef,
                                     mkdir,
                                     kAuthorizationFlagDefaults, (char**)mkdir_arg, nullptr);

  std::vector<std::string> arguments = { "-f", "-s",
                                       QCoreApplication::applicationDirPath().toStdString() + "/../Resources/ndn",
                                       "/usr/local/bin/ndn" };
  std::vector<const char*> args;
  for (const auto& i : arguments) {
    args.push_back(i.c_str());
  }
  args.push_back(nullptr);

  char const* helperTool  = "/bin/ln";
  AuthorizationExecuteWithPrivileges(authorizationRef,
                                     helperTool,
                                     kAuthorizationFlagDefaults,
                                     (char**)args.data(), NULL);

  AuthorizationFree(authorizationRef, kAuthorizationFlagDestroyRights);
#endif
}

#ifdef OSX_BUILD
void
TrayMenu::checkForUpdates()
{
  m_sparkle.checkForUpdates();
}
#endif // OSX_BUILD

} // namespace ncc
} // namespace ndn