using Newtonsoft.Json;
using ServerCore; using ServerBase;
using META_ID = System.UInt32;
using USER_GUID = System.String;

namespace ServerCommon
{
    public class OwnedLandAttribute : EntityAttributeBase, ICopyEntityAttributeFromDoc, IMergeWithEntityAttribute
    {
        [JsonProperty]
        public META_ID LandMetaId { get; set; } = 0;

        [JsonProperty]
        public OwnedType OwnedType { get; set; } = OwnedType.None;


        public OwnedLandAttribute(EntityBase owner, EntityBase entityOfOwnerEntityType)
            : base(owner, entityOfOwnerEntityType)
        {
        }

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

        public override void onClear()
        {
            LandMetaId = 0;
            OwnedType = OwnedType.None;

            getAttributeState().reset();
        }

        public override EntityAttributeBase onCloned()
        {
            var owner = getOwner();
            NullReferenceCheckHelper.throwIfNull(owner, () => $"owner is null !!!");
            var owner_entity = getEntityOfOwnerEntityType();
            NullReferenceCheckHelper.throwIfNull(owner_entity, () => $"owner_entity is null !!! - {owner.toBasicString()}");

            var cloned = new OwnedLandAttribute(owner, owner_entity);

            cloned.deepCopyFromBase(this);

            cloned.LandMetaId = LandMetaId;
            cloned.OwnedType = OwnedType;

            return cloned;
        }

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

            var owner = getOwner();
            NullReferenceCheckHelper.throwIfNull(owner, () => "owner is null");
            
            var user_attribute = owner.getRootParent().getEntityAttribute<UserAttribute>();
            NullReferenceCheckHelper.throwIfNull(user_attribute, () => "owner is null");
            USER_GUID user_guid = user_attribute.UserGuid;
            
            //=====================================================================================
            // Attribute => try pending Doc
            //=====================================================================================
            var try_pending_doc = getTryPendingDocBase() as OwnedLandDoc;
            if (null == try_pending_doc)
            {
                var to_copy_doc = new OwnedLandDoc(user_guid, LandMetaId);
                var origin_doc = getOriginDocBase<OwnedLandAttribute>();
                if (null != origin_doc)
                {
                    to_copy_doc.copyTimestampsFromOriginDocBase(origin_doc);
                }

                try_pending_doc = to_copy_doc;
                setTryPendingDocBase(try_pending_doc);
            }
           

            var to_copy_doc_attrib = try_pending_doc.getAttrib<OwnedLandAttrib>();
            NullReferenceCheckHelper.throwIfNull(to_copy_doc_attrib, () => $"to_copy_doc_attrib is null !!!");


            to_copy_doc_attrib.LandMetaId = LandMetaId;
            to_copy_doc_attrib.OwnedType = OwnedType;

            if (false == isForQuery)
            {
                return (result, try_pending_doc);
            }

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

            return (result, to_query_doc);
        }

        public bool copyEntityAttributeFromDoc(DynamoDbDocBase? docBase)
        {
            var err_msg = string.Empty;

            var to_cast_string = typeof(OwnedLandDoc).Name;

            var owned_land_doc_base = docBase as OwnedLandDoc;
            if (null == owned_land_doc_base)
            {
                err_msg = $"Failed to copyEntityAttributeFromDoc() !!!, owned_land_doc_base is null :{to_cast_string}";
                Log.getLogger().error(err_msg);
                return false;
            }
            
            //=====================================================================================
            // New Doc => Origin Doc
            //=====================================================================================
            syncOriginDocBaseWithNewDoc<OwnedLandAttribute>(owned_land_doc_base);
            

            //=====================================================================================
            // Doc => Attribute
            //=====================================================================================

            var owned_land_attrib = owned_land_doc_base.getAttrib<OwnedLandAttrib>();
            NullReferenceCheckHelper.throwIfNull(owned_land_attrib, () => $"owned_land_attrib is null !!!");

            LandMetaId = owned_land_attrib.LandMetaId;
            OwnedType = owned_land_attrib.OwnedType;

            return true;
        }

        public Result onMerge(EntityAttributeBase otherEntityAttribute)
        {
            var result = new Result();
            var err_msg = string.Empty;

            if (null == otherEntityAttribute)
            {
                err_msg = $"Invalid Param !!!, otherEntityAttribute is null";
                result.setFail(ServerErrorCode.FunctionParamNull, err_msg);
                Log.getLogger().error(result.toBasicString());

                return result;
            }

            //=====================================================================================
            // OtherAttribute => Attribute
            //=====================================================================================
            var owned_land_attribute = otherEntityAttribute as OwnedLandAttribute;
            if (null == owned_land_attribute)
            {
                err_msg = $"Failed to cast OwnedLandAttribute !!!, owned_land_attribute is null";
                result.setFail(ServerErrorCode.ClassTypeCastIsNull, err_msg);
                Log.getLogger().error(result.toBasicString());

                return result;
            }

            LandMetaId = owned_land_attribute.LandMetaId;
            OwnedType = owned_land_attribute.OwnedType;

            //=====================================================================================
            // Attribute Try Pending Doc => Origin Doc
            //=====================================================================================
            var try_pending_doc = owned_land_attribute.getTryPendingDocBase() as OwnedLandDoc;
            if (null != try_pending_doc)
            {
                owned_land_attribute.resetTryPendingDocBase();
                syncOriginDocBaseWithNewDoc<OwnedLandAttribute>(try_pending_doc);
            }

            var owner = getOwner();
            NullReferenceCheckHelper.throwIfNull(owner, () => $"owner is null !!!");
            var origin_doc_base = getOriginDocBase<OwnedLandAttribute>();
            if (null == origin_doc_base)
            {
                // DB 에 저장되어 있지 않는 경우 OriginDoc은 null 이다 !!!
                return result;
            }

            var owned_land_attrib = origin_doc_base.getAttrib<OwnedLandAttrib>(); 
            NullReferenceCheckHelper.throwIfNull(owned_land_attrib, () => $"owned_land_attrib is null !!! - {owner.toBasicString()}");
            
            owned_land_attrib.LandMetaId = LandMetaId;
            owned_land_attrib.OwnedType = OwnedType;

            return result;
        }
    }

    public class OwnedLandAttributeTransactor : EntityAttributeTransactorBase<OwnedLandAttribute>, ICopyEntityAttributeTransactorFromEntityAttribute
    {
        public OwnedLandAttributeTransactor(EntityBase owner)
            : base(owner)
        {
        }

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

            var to_cast_string = typeof(OwnedLandAttribute).Name;

            var copy_from_owned_land_attribute = entityAttributeBase as OwnedLandAttribute;
            if (null == copy_from_owned_land_attribute)
            {
                err_msg = $"Failed to copyEntityAttributeTransactorBaseFromEntityAttribute() !!!, copy_from_owned_land_attribute is null :{to_cast_string}";
                Log.getLogger().error(err_msg);
                return false;
            }

            var copy_to_owned_land_attribute = getClonedEntityAttribute() as OwnedLandAttribute;
            if (null == copy_to_owned_land_attribute)
            {
                err_msg = $"Failed to copyEntityAttributeTransactorBaseFromEntityAttribute() !!!, copy_to_owned_land_attribute is null :{to_cast_string}";
                Log.getLogger().error(err_msg);
                return false;
            }

            copy_to_owned_land_attribute.LandMetaId = copy_from_owned_land_attribute.LandMetaId;
            copy_to_owned_land_attribute.OwnedType = copy_from_owned_land_attribute.OwnedType;

            return true;
        }
    }
}