// Direktimport nötig, damit build_runner die @Entity-Annotation auflösen kann,
// ohne auf die gerade erst generierte objectbox.g.dart angewiesen zu sein
// (zirkuläre Auflösung). Nicht entfernen, auch wenn der Lint ihn als unnötig meldet.
// ignore: unnecessary_import
import 'package:objectbox/objectbox.dart';
import 'package:stadtbote/main.dart';
import 'package:stadtbote/objectbox.g.dart';
import 'package:stadtbote/tools/util.dart';

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

  // Nachrichten-ID für den Server, getrennt von der lokalen ObjectBox-ID.
  @Unique()
  late int externalId;

  late int time;

  late String from;

  late String subj;

  late String text;

  bool read = false;

  ChatMessage();

  factory ChatMessage.outgoing({
    required int externalId,
    required int time,
    required String from,
    required String text,
  }) {
    // ObjectBox vergibt die lokale ID beim ersten Speichern selbst.
    return ChatMessage()
      ..externalId = externalId
      ..time = time
      ..from = from
      ..subj = ''
      ..text = text
      ..read = true;
  }

  factory ChatMessage.fromJson(Map<String, dynamic> json) {
    final message = ChatMessage();
    message.id = 0; // Let ObjectBox assign the ID
    message.externalId = json['id'] as int; // Store external ID separately
    message.time = json['time'] as int;
    message.from = json['from'] as String;
    message.subj = json['subj'] as String;
    message.text = json['text'] as String;
    message.read = json['read'] as bool? ?? false;
    return message;
  }

  Map<String, dynamic> toJson() {
    return {
      'id': externalId, // Use external ID for JSON
      'time': time,
      'from': from,
      'subj': subj,
      'text': text,
      'read': read,
    };
  }

  static Future<ChatMessage> mergeFromJson(Map<String, dynamic> json) async {
    final box = MyApp.objectBoxStore.box<ChatMessage>();
    final externalId = json["id"] as int;

    // Find message by external ID
    final query = box.query(ChatMessage_.externalId.equals(externalId)).build();
    var availableMessage = query.findFirst();
    query.close();

    if (availableMessage != null) {
      availableMessage.externalId = json["id"];
      availableMessage.time = json["time"];
      availableMessage.from = json["from"];
      availableMessage.subj = json["subj"];
      availableMessage.text = json['text'];

      return availableMessage;
    } else {
      var message = ChatMessage.fromJson(json);
      message.read = false;

      return message;
    }
  }

  static Future<int> getNextId() async {
    int currentExport500Id = Util.preferencesGetInt('next_message_id', 0) as int;

    currentExport500Id += 1;

    Util.preferencesSaveInt("next_message_id", currentExport500Id);

    return currentExport500Id;
  }
}