/// App-owned user profile synced between local Drift storage and Postgres.
class UserProfile {
  const UserProfile({
    required this.firebaseUid,
    this.email,
    this.displayName,
    this.photoUrl,
    this.locale = 'en',
    this.timezone,
    this.onboardingCompleted = false,
    this.revision = 1,
    required this.updatedAt,
    this.lastSyncedAt,
    this.dirty = false,
  });

  final String firebaseUid;
  final String? email;
  final String? displayName;
  final String? photoUrl;
  final String locale;
  final String? timezone;
  final bool onboardingCompleted;
  final int revision;
  final DateTime updatedAt;
  final DateTime? lastSyncedAt;
  final bool dirty;

  UserProfile copyWith({
    String? email,
    String? displayName,
    String? photoUrl,
    String? locale,
    String? timezone,
    bool? onboardingCompleted,
    int? revision,
    DateTime? updatedAt,
    DateTime? lastSyncedAt,
    bool? dirty,
    bool clearLastSyncedAt = false,
  }) {
    return UserProfile(
      firebaseUid: firebaseUid,
      email: email ?? this.email,
      displayName: displayName ?? this.displayName,
      photoUrl: photoUrl ?? this.photoUrl,
      locale: locale ?? this.locale,
      timezone: timezone ?? this.timezone,
      onboardingCompleted: onboardingCompleted ?? this.onboardingCompleted,
      revision: revision ?? this.revision,
      updatedAt: updatedAt ?? this.updatedAt,
      lastSyncedAt: clearLastSyncedAt
          ? null
          : (lastSyncedAt ?? this.lastSyncedAt),
      dirty: dirty ?? this.dirty,
    );
  }

  factory UserProfile.fromAuth({
    required String firebaseUid,
    String? email,
    String? displayName,
    String? photoUrl,
  }) {
    return UserProfile(
      firebaseUid: firebaseUid,
      email: email,
      displayName: displayName,
      photoUrl: photoUrl,
      updatedAt: DateTime.now().toUtc(),
      dirty: true,
    );
  }

  factory UserProfile.fromJson(Map<String, dynamic> json) {
    return UserProfile(
      firebaseUid: json['firebaseUid'] as String,
      email: json['email'] as String?,
      displayName: json['displayName'] as String?,
      photoUrl: json['photoUrl'] as String?,
      locale: json['locale'] as String? ?? 'en',
      timezone: json['timezone'] as String?,
      onboardingCompleted: json['onboardingCompleted'] as bool? ?? false,
      revision: (json['revision'] as num?)?.toInt() ?? 1,
      updatedAt: DateTime.parse(json['updatedAt'] as String).toUtc(),
      lastSyncedAt: json['lastSyncedAt'] == null
          ? null
          : DateTime.parse(json['lastSyncedAt'] as String).toUtc(),
      dirty: json['dirty'] as bool? ?? false,
    );
  }

  Map<String, dynamic> toJson() {
    return <String, dynamic>{
      'firebaseUid': firebaseUid,
      'email': email,
      'displayName': displayName,
      'photoUrl': photoUrl,
      'locale': locale,
      'timezone': timezone,
      'onboardingCompleted': onboardingCompleted,
      'revision': revision,
      'updatedAt': updatedAt.toUtc().toIso8601String(),
      if (lastSyncedAt != null)
        'lastSyncedAt': lastSyncedAt!.toUtc().toIso8601String(),
      'dirty': dirty,
    };
  }

  /// Payload sent to the API (server assigns authoritative revision on conflict).
  Map<String, dynamic> toApiJson() {
    return <String, dynamic>{
      'email': email,
      'displayName': displayName,
      'photoUrl': photoUrl,
      'locale': locale,
      'timezone': timezone,
      'onboardingCompleted': onboardingCompleted,
      'revision': revision,
      'updatedAt': updatedAt.toUtc().toIso8601String(),
    };
  }
}