// Copyright 2018 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef CHROME_BROWSER_CHROMEOS_NETWORK_CHANGE_MANAGER_CLIENT_H_
#define CHROME_BROWSER_CHROMEOS_NETWORK_CHANGE_MANAGER_CLIENT_H_

#include <string>

#include "base/gtest_prod_util.h"
#include "base/macros.h"
#include "chromeos/dbus/power/power_manager_client.h"
#include "chromeos/network/network_state_handler_observer.h"
#include "net/base/network_change_notifier.h"
#include "services/network/public/mojom/network_change_manager.mojom.h"

namespace net {
class NetworkChangeNotifierPosix;
}

namespace chromeos {

// This class listens to Shill for network change events and notifies both
// the local NetworkChangeNotifierPosix, and the network service via
// the NetworkChangeManager if the network service is enabled.
class NetworkChangeManagerClient
    : public chromeos::PowerManagerClient::Observer,
      public chromeos::NetworkStateHandlerObserver {
 public:
  NetworkChangeManagerClient(
      net::NetworkChangeNotifierPosix* network_change_notifier);
  ~NetworkChangeManagerClient() override;

  // PowerManagerClient::Observer overrides.
  void SuspendDone(const base::TimeDelta& sleep_duration) override;

  // NetworkStateHandlerObserver overrides.
  void DefaultNetworkChanged(
      const chromeos::NetworkState* default_network) override;

 private:
  friend class NetworkChangeManagerClientUpdateTest;
  FRIEND_TEST_ALL_PREFIXES(NetworkChangeManagerClientTest,
                           ConnectionTypeFromShill);
  FRIEND_TEST_ALL_PREFIXES(NetworkChangeManagerClientTest,
                           NetworkChangeNotifierConnectionTypeUpdated);

  void ConnectToNetworkChangeManager();
  void ReconnectToNetworkChangeManager();

  // Updates the notifier state based on a default network update.
  // |connection_type_changed| is set to true if we must report a connection
  // type change.
  // |ip_address_changed| is set to true if we must report an IP address change.
  // |dns_changed| is set to true if we must report a DNS config change.
  // |connection_subtype_changed| is set to true if we must report a connection
  // subtype change.
  void UpdateState(const chromeos::NetworkState* default_network,
                   bool* dns_changed,
                   bool* ip_address_changed,
                   bool* connection_type_changed,
                   bool* connection_subtype_changed);

  // Maps the shill network type and technology to its NetworkChangeNotifier
  // equivalent.
  //
  // This is a static member function for testing.
  static net::NetworkChangeNotifier::ConnectionType ConnectionTypeFromShill(
      const std::string& type,
      const std::string& technology);

  // Maps the shill network type and technology to its NetworkChangeNotifier
  // subtype equivalent.
  //
  // This is a static member function for testing.
  static net::NetworkChangeNotifier::ConnectionSubtype GetConnectionSubtype(
      const std::string& type,
      const std::string& technology);

  net::NetworkChangeNotifier::ConnectionType connection_type_;
  net::NetworkChangeNotifier::ConnectionSubtype connection_subtype_;
  // IP address for the current default network.
  std::string ip_address_;
  // DNS servers for the current default network.
  std::string dns_servers_;
  // Service path for the current default network.
  std::string service_path_;

  net::NetworkChangeNotifierPosix* network_change_notifier_;
  network::mojom::NetworkChangeManagerPtr network_change_manager_;

  DISALLOW_COPY_AND_ASSIGN(NetworkChangeManagerClient);
};

}  // namespace chromeos

#endif  // CHROME_BROWSER_CHROMEOS_NETWORK_CHANGE_MANAGER_CLIENT_H_