import 'package:json_annotation/json_annotation.dart';
import 'package:stream_chat/src/models/serialization.dart';

part 'user.g.dart';

/// The class that defines the user model
@JsonSerializable()
class User {
  /// Constructor used for json serialization
  User({
    this.id,
    this.role,
    this.createdAt,
    this.updatedAt,
    this.lastActive,
    this.online,
    this.extraData,
    this.banned,
    this.teams,
  });

  /// Create a new instance from a json
  factory User.fromJson(Map<String, dynamic> json) => _$UserFromJson(
      Serialization.moveToExtraDataFromRoot(json, topLevelFields));

  /// Use this named constructor to create a new user instance
  User.init(
    this.id, {
    this.online,
    this.extraData,
  })  : createdAt = null,
        updatedAt = null,
        lastActive = null,
        banned = null,
        teams = null,
        role = null;

  /// Known top level fields.
  /// Useful for [Serialization] methods.
  static const topLevelFields = [
    'id',
    'role',
    'created_at',
    'updated_at',
    'last_active',
    'online',
    'banned',
    'teams',
  ];

  /// User id
  final String id;

  /// User role
  @JsonKey(includeIfNull: false, toJson: Serialization.readOnly)
  final String role;

  /// User role
  @JsonKey(includeIfNull: false, toJson: Serialization.readOnly)
  final List<String> teams;

  /// Date of user creation
  @JsonKey(includeIfNull: false, toJson: Serialization.readOnly)
  final DateTime createdAt;

  /// Date of last user update
  @JsonKey(includeIfNull: false, toJson: Serialization.readOnly)
  final DateTime updatedAt;

  /// Date of last user connection
  @JsonKey(includeIfNull: false, toJson: Serialization.readOnly)
  final DateTime lastActive;

  /// True if user is online
  @JsonKey(includeIfNull: false, toJson: Serialization.readOnly)
  final bool online;

  /// True if user is banned from the chat
  @JsonKey(includeIfNull: false, toJson: Serialization.readOnly)
  final bool banned;

  /// Map of custom user extraData
  @JsonKey(includeIfNull: false)
  final Map<String, dynamic> extraData;

  @override
  int get hashCode => id.hashCode;

  /// Shortcut for user name
  String get name =>
      (extraData?.containsKey('name') == true && extraData['name'] != '')
          ? extraData['name']
          : id;

  @override
  bool operator ==(Object other) =>
      identical(this, other) ||
      other is User && runtimeType == other.runtimeType && id == other.id;

  /// Serialize to json
  Map<String, dynamic> toJson() =>
      Serialization.moveFromExtraDataToRoot(_$UserToJson(this), topLevelFields);
}