/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "networkwatcher.h"

#include <QMetaEnum>

//#include "controller.h"
#include "leakdetector.h"
#include "logger.h"
//#include "mozillavpn.h"
#include "networkwatcherimpl.h"
//#include "settingsholder.h"

#ifdef MZ_WINDOWS
#  include "platforms/windows/windowsnetworkwatcher.h"
#endif

#ifdef MZ_LINUX
#  include "platforms/linux/linuxnetworkwatcher.h"
#endif

#ifdef MZ_MACOS
#  include "platforms/macos/macosnetworkwatcher.h"
#endif

#ifdef MZ_WASM
#  include "platforms/wasm/wasmnetworkwatcher.h"
#endif
#ifdef MZ_ANDROID
#  include "platforms/android/androidnetworkwatcher.h"
#endif

#ifdef MZ_IOS
#  include "platforms/ios/iosnetworkwatcher.h"
#endif

// How often we notify the same unsecured network
#ifndef UNIT_TEST
constexpr uint32_t NETWORK_WATCHER_TIMER_MSEC = 20000;
#endif

namespace {
Logger logger("NetworkWatcher");
}

NetworkWatcher::NetworkWatcher() { MZ_COUNT_CTOR(NetworkWatcher); }

NetworkWatcher::~NetworkWatcher() { MZ_COUNT_DTOR(NetworkWatcher); }

void NetworkWatcher::initialize() {
  logger.debug() << "Initialize NetworkWatcher";

#if defined(MZ_WINDOWS)
  m_impl = new WindowsNetworkWatcher(this);
#elif defined(MZ_LINUX)
  m_impl = new LinuxNetworkWatcher(this);
#elif defined(MZ_MACOS)
  m_impl = new MacOSNetworkWatcher(this);
#elif defined(MZ_WASM)
  m_impl = new WasmNetworkWatcher(this);
#elif defined(MZ_ANDROID)
  m_impl = new AndroidNetworkWatcher(this);
#elif defined(MZ_IOS)
  m_impl = new IOSNetworkWatcher(this);
#else
  m_impl = new DummyNetworkWatcher(this);
#endif


  connect(m_impl, &NetworkWatcherImpl::unsecuredNetwork, this,
          &NetworkWatcher::unsecuredNetwork);
  connect(m_impl, &NetworkWatcherImpl::networkChanged, this,
          &NetworkWatcher::networkChanged);
  connect(m_impl, &NetworkWatcherImpl::wakeup, this,
          &NetworkWatcher::wakeup);
  m_impl->initialize();

  // Enable sleep/wake monitoring for VPN auto-reconnection
  logger.debug() << "Starting NetworkWatcher for sleep/wake monitoring";
  logger.debug() << "About to call m_impl->start()";
  try {
    m_impl->start();
    logger.debug() << "m_impl->start() completed successfully";
  } catch (const std::exception& e) {
    logger.error() << "Exception in m_impl->start():" << e.what();
  } catch (...) {
    logger.error() << "Unknown exception in m_impl->start()";
  }
  m_active = true;
  m_reportUnsecuredNetwork = false; // Disable unsecured network alerts for Amnezia
}

void NetworkWatcher::settingsChanged() {
  // For Amnezia: Keep NetworkWatcher always active for sleep/wake monitoring
  logger.debug() << "NetworkWatcher settings changed - keeping sleep monitoring active";
}

void NetworkWatcher::unsecuredNetwork(const QString& networkName,
                                      const QString& networkId) {
  logger.debug() << "Unsecured network:" << logger.sensitive(networkName)
                 << "id:" << logger.sensitive(networkId);
#ifndef UNIT_TEST
  if (!m_reportUnsecuredNetwork) {
    logger.debug() << "Disabled. Ignoring unsecured network";
    return;
  }
// TODO: IMPL FOR AMNEZIA
#if 0
  MozillaVPN* vpn = MozillaVPN::instance();

  if (vpn->state() != App::StateMain) {
    logger.debug() << "VPN not ready. Ignoring unsecured network";
    return;
  }

  Controller::State state = vpn->controller()->state();
  if (state == Controller::StateOn || state == Controller::StateConnecting ||
      state == Controller::StateCheckSubscription ||
      state == Controller::StateSwitching ||
      state == Controller::StateSilentSwitching) {
    logger.debug() << "VPN on. Ignoring unsecured network";
    return;
  }

  if (!m_networks.contains(networkId)) {
    m_networks.insert(networkId, QElapsedTimer());
  } else if (!m_networks[networkId].hasExpired(NETWORK_WATCHER_TIMER_MSEC)) {
    logger.debug() << "Notification already shown. Ignoring unsecured network";
    return;
  }

  // Let's activate the QElapsedTimer to avoid notification loops.
  m_networks[networkId].start();

  // We don't connect the system tray handler in the CTOR because it can be too
  // early. Maybe the NotificationHandler has not been created yet. We do it at
  // the first detection of an unsecured network.
  if (m_firstNotification) {
    connect(NotificationHandler::instance(),
            &NotificationHandler::notificationClicked, this,
            &NetworkWatcher::notificationClicked);
    m_firstNotification = false;
  }

  NotificationHandler::instance()->unsecuredNetworkNotification(networkName);
#endif
#endif
}


QNetworkInformation::Reachability NetworkWatcher::getReachability() {
  if (m_simulatedDisconnection) {
    return QNetworkInformation::Reachability::Disconnected;
  } else if (QNetworkInformation::instance()) {
    return QNetworkInformation::instance()->reachability();
  }
  return QNetworkInformation::Reachability::Unknown;
}

void NetworkWatcher::simulateDisconnection(bool simulatedDisconnection) {
  m_simulatedDisconnection = simulatedDisconnection;
}