chat-server/lib/models.dart

import 'package:objectbox/objectbox.dart';

/// User entity - works for both HOME and GUEST servers
///
/// On HOME server:
/// - isLocal = true
/// - stores password, encrypted private key
/// - this is where identity lives
///
/// On GUEST server:
/// - isLocal = false
/// - homeServer contains the URL of user's home
/// - publicKey cached for verification
@Entity(uid: 3848231140411393897)
class ChatUser {
  @Id()
  int id = 0;

  // Global immutable identifier (opaque, host-independent).
  @Unique()
  String userId;

  // Basic profile
  @Index()
  String username;
  String? displayName;
  String? avatarUrl;
  String? bio;

  // Identity
  String publicKey; // ECDSA public key, always stored

  // HOME SERVER ONLY: Auth & key backup
  String? passwordHash;
  String? encryptedPrivateKey; // Encrypted with user's password
  String? keyPairSalt;

  // Server relationship
  bool isLocal; // true = this is their home server
  String? homeServer; // if guest, where is their home? (e.g., "https://my.server.com")

  // Server-specific
  List<String> roles; // ["admin", "moderator", "member"]

  @Property(type: PropertyType.date)
  DateTime createdAt;

  @Property(type: PropertyType.date)
  DateTime? lastSyncedAt; // When profile was last refreshed from home

  ChatUser({
    required this.userId,
    required this.username,
    required this.publicKey,
    required this.isLocal,
    this.displayName,
    this.avatarUrl,
    this.bio,
    this.passwordHash,
    this.encryptedPrivateKey,
    this.keyPairSalt,
    this.homeServer,
    List<String>? roles,
    DateTime? createdAt,
    DateTime? lastSyncedAt,
  })  : roles = roles ?? ['member'],
        createdAt = createdAt ?? DateTime.now(),
        lastSyncedAt = lastSyncedAt;
}

@Entity(uid: 2663861829934850300)
class ChatChannel {
  @Id()
  int id = 0;

  @Unique()
  String name;

  String? description;

  @Property(type: PropertyType.date)
  DateTime createdAt;

  ChatChannel({
    required this.name,
    this.description,
    DateTime? createdAt,
  }) : createdAt = createdAt ?? DateTime.now();
}

@Entity(uid: 2697867424319168785)
class ChatMessage {
  @Id()
  int id = 0;

  int channelId;

  // Author info - includes enough for cross-server profile fetch
  int authorLocalId;
  String authorUserId; // Immutable userId
  String? authorHomeServer; // for profile fetching

  // Cached for display (snapshot at message time)
  String authorUsername;
  String? authorAvatarUrl;

  String content;
  String componentsJson;

  @Property(type: PropertyType.date)
  DateTime createdAt;

  @Property(type: PropertyType.date)
  DateTime? editedAt;

  ChatMessage({
    required this.channelId,
    required this.authorLocalId,
    required this.authorUserId,
    required this.authorUsername,
    required this.content,
    required this.componentsJson,
    this.authorHomeServer,
    this.authorAvatarUrl,
    DateTime? createdAt,
    this.editedAt,
  }) : createdAt = createdAt ?? DateTime.now();
}

@Entity()
class ChatFile {
  @Id()
  int id = 0;

  @Unique()
  String attachmentId;

  int uploaderId;
  String path;
  String originalFileName;
  String storedFileName;
  String sha256;
  String mimeType;
  int width;
  int height;
  int sizeBytes;
  bool isAttached;
  String usageType; // message | avatar | server_icon | server_banner
  String status; // pending | ready | failed
  String? errorCode;

  @Property(type: PropertyType.date)
  DateTime createdAt;

  ChatFile({
    required this.attachmentId,
    required this.uploaderId,
    required this.path,
    required this.originalFileName,
    required this.storedFileName,
    required this.sha256,
    required this.mimeType,
    required this.width,
    required this.height,
    required this.sizeBytes,
    this.usageType = 'message',
    this.status = 'pending',
    this.isAttached = false,
    this.errorCode,
    DateTime? createdAt,
  }) : createdAt = createdAt ?? DateTime.now();
}

@Entity()
class ServerSettings {
  @Id()
  int id = 0;

  @Unique()
  String singletonKey;

  String serverName;
  String? description;
  String? iconAttachmentId;
  String? bannerAttachmentId;
  String? updatedByUserId;

  @Property(type: PropertyType.date)
  DateTime updatedAt;

  ServerSettings({
    this.singletonKey = 'default',
    required this.serverName,
    this.description,
    this.iconAttachmentId,
    this.bannerAttachmentId,
    this.updatedByUserId,
    DateTime? updatedAt,
  }) : updatedAt = updatedAt ?? DateTime.now();
}

@Entity()
class ChatMessageMedia {
  @Id()
  int id = 0;

  int messageId;
  int channelId;
  String authorUserId;

  // local_upload
  String? attachmentId;

  // external_url
  String? externalUrl;

  // image | video | file
  String kind;
  String? mimeType;
  String? originalFileName;
  int? sizeBytes;
  int? width;
  int? height;
  String? thumbHash;

  @Property(type: PropertyType.date)
  DateTime createdAt;

  ChatMessageMedia({
    required this.messageId,
    required this.channelId,
    required this.authorUserId,
    required this.kind,
    this.attachmentId,
    this.externalUrl,
    this.mimeType,
    this.originalFileName,
    this.sizeBytes,
    this.width,
    this.height,
    this.thumbHash,
    DateTime? createdAt,
  }) : createdAt = createdAt ?? DateTime.now();
}