import 'package:drift/drift.dart';

import 'app_database.dart';

/// Zugriff auf die Einzeilen-Einstellungstabelle (Doku 7.5): welches
/// Drohnenprofil zuletzt aktiv war und welche Mission zuletzt bearbeitet
/// wurde, um beide nach einem Neustart wiederherzustellen.
class AppSettingsRepository {
  AppSettingsRepository(this._db);

  final AppDatabase _db;

  static const _rowId = 0;

  Future<
      ({
        int? activeDroneProfileId,
        int? currentMissionId,
        String? connectionDeviceAddress,
        bool connectionAutoConnect,
      })> load() async {
    final row = await (_db.select(_db.appSettingsTable)
          ..where((s) => s.id.equals(_rowId)))
        .getSingleOrNull();
    return (
      activeDroneProfileId: row?.activeDroneProfileId,
      currentMissionId: row?.currentMissionId,
      connectionDeviceAddress: row?.connectionDeviceAddress,
      connectionAutoConnect: row?.connectionAutoConnect ?? true,
    );
  }

  Future<void> setActiveDroneProfileId(int? id) async {
    await _upsert(AppSettingsTableCompanion(
      id: const Value(_rowId),
      activeDroneProfileId: Value(id),
    ));
  }

  Future<void> setCurrentMissionId(int? id) async {
    await _upsert(AppSettingsTableCompanion(
      id: const Value(_rowId),
      currentMissionId: Value(id),
    ));
  }

  /// Gemerkte Bluetooth-MAC-Adresse (Doku Kommunikationsschicht 3.2a), oder
  /// null um die Erinnerung zu loeschen (z.B. nach "Geraet entkoppeln").
  Future<String?> loadConnectionDeviceAddress() async =>
      (await load()).connectionDeviceAddress;

  Future<void> setConnectionDeviceAddress(String? address) async {
    await _upsert(AppSettingsTableCompanion(
      id: const Value(_rowId),
      connectionDeviceAddress: Value(address),
    ));
  }

  /// "Beim Wechsel in Fly automatisch verbinden" (Doku 7), Standard an.
  Future<void> setConnectionAutoConnect(bool value) async {
    await _upsert(AppSettingsTableCompanion(
      id: const Value(_rowId),
      connectionAutoConnect: Value(value),
    ));
  }

  Future<void> _upsert(AppSettingsTableCompanion companion) async {
    await _db.into(_db.appSettingsTable).insertOnConflictUpdate(companion);
  }
}