private Realm LocalStorage => Realm.GetInstance(GetRealmConfig());

public void Delete()
{
	App.Log.Info("Deleting realm.");

	//delete data on device (realm)
	if (_config != null)
	{
		LocalStorage.Dispose();
		Realm.DeleteRealm(_config); //throws exception here,crashing app; 
		App.Log.Info("Realm deleted.");
	}
	
	//clear local db identifier (this will force app to generate a new realm)
	_localDbId = null;
	_appIo.SetPreference(AppPreference.DbIdentifier, null);
	_appIo.SetPreference(AppPreference.DbSchemaVersion, null);
	_config = null;
}

private RealmConfiguration GetRealmConfig()
{
	return _config ?? (_config = BuildRealmConfig());
}

private RealmConfiguration BuildRealmConfig()
{
	var dbId = GetLocalDbId();
	var dbName = $"prepify-{App.User.MemberInfo.MemberGuid}_{dbId}.realm";
	var schema = GetSchemaVersion();
	App.Log.Info($"Access realm: schema {schema} | id {dbId} | name {dbName}");

	return new RealmConfiguration(dbName)
	{
		ShouldDeleteIfMigrationNeeded = true,
		SchemaVersion = schema
	};
}

private ulong GetSchemaVersion()
{
	return _appIo.GetPreference<ulong?>(AppPreference.DbSchemaVersion) ?? 1;
}

private int GetLocalDbId()
{
	App.Log.Info($"getting dbId");

	lock (_locker)
	{
		if (!_localDbId.HasValue)
			_localDbId = _appIo.GetPreference<int?>(AppPreference.DbIdentifier);

		if (!_localDbId.HasValue)
		{
			_localDbId = new Random(DateTime.Now.Millisecond).Next(111111, 999999);
			App.Log.Info($"set new dbId {_localDbId}; this will force generate a new realm when accessed");
			_appIo.SetPreference(AppPreference.DbIdentifier, _localDbId);
		}
	}

	return _localDbId.Value;
}