using ServerCommon;

using ServerCore; using ServerBase;

using ThirdParty.Json.LitJson;

// EntityAttributeBase를 상속 받은 개체는 메모리에 사용될 내용임
// 스토리지에 저장은 UsrTestDoc:DynamoDbDocBase에서 처리함
public class UserTestEntityAttribute : EntityAttributeBase
{
    [JsonProperty] public string UserId { get; set; } = string.Empty;
    [JsonProperty] public string Name { get; set; } = string.Empty;

    public UserTestEntityAttribute(EntityBase owner) : base(owner)
    {
    }

    public override UserTestDoc onCreateDocBase()
    {
        return new UserTestDoc(UserId, Name);
    }

    public override void onClear()
    {
        UserId = string.Empty;
        Name = string.Empty;
        getAttributeState().reset();
    }

    public override async Task<(Result, DynamoDbDocBase?)> toDocBase(bool isForQuery = true)
    {
        var result = new Result();

        //=====================================================================================
        // try_pending_doc은 없으면 새로 생성하고 초기화 한다.
        //=====================================================================================
        if (getTryPendingDocBase() is not UserTestDoc try_pending_doc)
        {
            var new_pending_doc = new UserTestDoc();
            var origin_doc = getOriginDocBase<UserTestEntityAttribute>();
            if (origin_doc is not null)
            {
                new_pending_doc.copyTimestampsFromOriginDocBase(origin_doc);
            }

            setTryPendingDocBase(new_pending_doc);
            try_pending_doc = (getTryPendingDocBase() as UserTestDoc)!;
            NullReferenceCheckHelper.throwIfNull(try_pending_doc, () => $"try_pending_doc is null !!!");
        }

        var to_copy_user_test_attrib = try_pending_doc.getAttrib<UserTestAttrib>();
        NullReferenceCheckHelper.throwIfNull(to_copy_user_test_attrib, () => $"to_copy_user_test_attrib is null !!!");
        to_copy_user_test_attrib.UserId = UserId;
        to_copy_user_test_attrib.Name = Name;


        // 읽기 용도가 아닌 경우
        if (false == isForQuery)
        {
            return (result, try_pending_doc);
        }

        //=====================================================================================
        // Doc QueryType 반영
        //=====================================================================================
        (result, var to_query_doc) = await applyDoc4Query(try_pending_doc);
        return result.isFail() ? (result, null) : (result, to_query_doc);
    }

    public override IEntityAttributeTransactor onNewEntityAttributeTransactor()
    {
        return new UserTestEntityAttributeTransactor(getOwner());
    }

    public override EntityAttributeBase onCloned()
    {
        var owner = getOwner() as UserTestEntity;
        NullReferenceCheckHelper.throwIfNull(owner, () => $"owner is null !!!");

        return new UserTestEntityAttribute(owner) { UserId = UserId, Name = Name };
    }

    private class UserTestEntityAttributeTransactor : EntityAttributeTransactorBase<UserTestEntityAttribute>,
        ICopyEntityAttributeTransactorFromEntityAttribute
    {
        public UserTestEntityAttributeTransactor(EntityBase owner) : base(owner)
        {
        }

        public bool copyEntityAttributeTransactorFromEntityAttribute(EntityAttributeBase? entityAttribute)
        {
            var err_msg = string.Empty;

            var to_cast_string = nameof(UserTestEntityAttribute);

            if (entityAttribute is not UserTestEntityAttribute copy_from_user_test_attribute)
            {
                err_msg =
                    $"Failed to copyEntityAttributeTransactorBaseFromEntityAttribute() !!!, copy_from_user_test_attribute is null :{to_cast_string}";
                Log.getLogger().error(err_msg);
                return false;
            }

            // 롤백을 위해 객체를 복사한다.
            if (getClonedEntityAttribute() is not UserTestEntityAttribute copy_to_user_test_attribute)
            {
                err_msg =
                    $"Failed to copyEntityAttributeTransactorBaseFromEntityAttribute() !!!, copy_to_user_test_attribute is null :{to_cast_string}";
                Log.getLogger().error(err_msg);
                return false;
            }

            copy_to_user_test_attribute.UserId = copy_from_user_test_attribute.UserId;
            copy_to_user_test_attribute.Name = copy_from_user_test_attribute.Name;
            return true;
        }
    }
}