import 'package:contacts_plus_plus/auxiliary.dart';
import 'package:contacts_plus_plus/models/users/user_profile.dart';
import 'package:contacts_plus_plus/models/users/friend_status.dart';
import 'package:contacts_plus_plus/models/users/online_status.dart';
import 'package:contacts_plus_plus/models/users/user_status.dart';

class Friend implements Comparable {
  static const _emptyId = "-1";
  static const _neosBotId = "U-Neos";
  final String id;
  final String username;
  final String ownerId;
  final UserStatus userStatus;
  final UserProfile userProfile;
  final FriendStatus friendStatus;
  final DateTime latestMessageTime;

  const Friend({required this.id, required this.username, required this.ownerId, required this.userStatus, required this.userProfile,
    required this.friendStatus, required this.latestMessageTime,
  });

  bool get isHeadless => userStatus.activeSessions.any((session) => session.headlessHost == true && session.hostUserId == id);

  factory Friend.fromMap(Map map) {
    final userStatus = map["userStatus"] == null ? UserStatus.empty() : UserStatus.fromMap(map["userStatus"]);
    return Friend(
      id: map["id"],
      username: map["contactUsername"],
      ownerId: map["ownerId"] ?? map["id"],
      // Neos bot status is always offline but should be displayed as online
      userStatus:  map["id"] == _neosBotId ? userStatus.copyWith(onlineStatus: OnlineStatus.online) : userStatus,
      userProfile: UserProfile.fromMap(map["profile"] ?? {}),
      friendStatus: FriendStatus.fromString(map["contactStatus"]),
      latestMessageTime: map["latestMessageTime"] == null
          ? DateTime.fromMillisecondsSinceEpoch(0) : DateTime.parse(map["latestMessageTime"]),
    );
  }

  static Friend? fromMapOrNull(Map? map) {
    if (map == null) return null;
    return Friend.fromMap(map);
  }

  factory Friend.empty() {
    return Friend(
        id: _emptyId,
        username: "",
        ownerId: "",
        userStatus: UserStatus.empty(),
        userProfile: UserProfile.empty(),
        friendStatus: FriendStatus.none,
        latestMessageTime: DateTimeX.epoch
    );
  }

  bool get isEmpty => id == _emptyId;

  Friend copyWith({
    String? id, String? username, String? ownerId, UserStatus? userStatus, UserProfile? userProfile,
    FriendStatus? friendStatus, DateTime? latestMessageTime}) {
    return Friend(
      id: id ?? this.id,
      username: username ?? this.username,
      ownerId: ownerId ?? this.ownerId,
      userStatus: userStatus ?? this.userStatus,
      userProfile: userProfile ?? this.userProfile,
      friendStatus: friendStatus ?? this.friendStatus,
      latestMessageTime: latestMessageTime ?? this.latestMessageTime,
    );
  }

  Map toMap({bool shallow=false}) {
    return {
      "id": id,
      "username": username,
      "ownerId": ownerId,
      "userStatus": userStatus.toMap(shallow: shallow),
      "profile": userProfile.toMap(),
      "friendStatus": friendStatus.name,
      "latestMessageTime": latestMessageTime.toIso8601String(),
    };
  }

  @override
  int compareTo(covariant Friend other) {
    return username.compareTo(other.username);
  }
}