// Copyright 2014 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 COMPONENTS_CRYPTAUTH_REMOTE_DEVICE_H_
#define COMPONENTS_CRYPTAUTH_REMOTE_DEVICE_H_

#include <string>
#include <vector>

#include "components/cryptauth/proto/cryptauth_api.pb.h"

namespace cryptauth {

struct RemoteDevice {
 public:
  std::string user_id;
  std::string name;
  std::string public_key;
  std::string bluetooth_address;
  std::string persistent_symmetric_key;
  bool unlock_key;
  bool supports_mobile_hotspot;
  int64_t last_update_time_millis;

  // Note: To save space, the BeaconSeeds may not necessarily be included in
  // this object.
  bool are_beacon_seeds_loaded = false;
  std::vector<BeaconSeed> beacon_seeds;

  RemoteDevice();
  RemoteDevice(const std::string& user_id,
               const std::string& name,
               const std::string& public_key,
               const std::string& bluetooth_address,
               const std::string& persistent_symmetric_key,
               bool unlock_key,
               bool supports_mobile_hotspot,
               int64_t last_update_time_millis);
  RemoteDevice(const RemoteDevice& other);
  ~RemoteDevice();

  // Loads a vector of BeaconSeeds for the RemoteDevice.
  void LoadBeaconSeeds(const std::vector<BeaconSeed>& beacon_seeds);

  // Returns a unique ID for the device.
  std::string GetDeviceId() const;

  // Returns a shortened device ID for the purpose of concise logging (device
  // IDs are often so long that logs are difficult to read). Note that this
  // ID is not guaranteed to be unique, so it should only be used for log.
  std::string GetTruncatedDeviceIdForLogs() const;

  bool operator==(const RemoteDevice& other) const;

  // Compares devices via their public keys. Note that this function is
  // necessary in order to use |RemoteDevice| as a key of a std::map.
  bool operator<(const RemoteDevice& other) const;

  // Generates the device ID for a device given its public key.
  static std::string GenerateDeviceId(const std::string& public_key);

  // Derives the public key that was used to generate the given device ID;
  // returns empty string if |device_id| is not a valid device ID.
  static std::string DerivePublicKey(const std::string& device_id);

  // Static method for truncated device ID for logs.
  static std::string TruncateDeviceIdForLogs(const std::string& full_id);
};

typedef std::vector<RemoteDevice> RemoteDeviceList;

}  // namespace cryptauth

#endif  // COMPONENTS_CRYPTAUTH_REMOTE_DEVICE_H_