using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;


using Newtonsoft.Json;


using ServerCore; using ServerBase;


using SESSION_ID = System.Int32;
using WORLD_ID = System.UInt32;
using META_ID = System.UInt32;
using ENTITY_GUID = System.String;
using ACCOUNT_ID = System.String;
using OWNER_GUID = System.String;
using USER_GUID = System.String;
using CHARACTER_GUID = System.String;
using ITEM_GUID = System.String;



namespace ServerCommon
{
    public class NicknameAttribute : EntityAttributeBase, ICopyEntityAttributeFromDoc, IMergeWithEntityAttribute
    {
        [JsonProperty]
        public string Nickname { get; set; } = string.Empty;
        

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

        public override void onClear()
        {
            Nickname = string.Empty;

            getAttributeState().reset();
        }

        public override EntityAttributeBase onCloned()
        {
            var owner = getOwner();
            ArgumentNullException.ThrowIfNull(owner);

            var cloned = new NicknameAttribute(owner);
            cloned.Nickname = Nickname;

            return cloned;
        }

        public override IEntityAttributeTransactor onNewEntityAttributeTransactor()
        {
            var owner = getOwner();
            ArgumentNullException.ThrowIfNull(owner);

            return new NicknameAttributeTransactor(owner);
        }

        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.getEntityAttribute<UserAttribute>();
            NullReferenceCheckHelper.throwIfNull(user_attribute, () => "user_attribute is null");

            USER_GUID user_guid = user_attribute.UserGuid;
            
            //=====================================================================================
            // Attribute => try pending Doc
            //=====================================================================================
            var try_pending_doc = getTryPendingDocBase() as NicknameDoc;
            if (null == try_pending_doc)
            {
                var to_copy_doc = new NicknameDoc(OwnerEntityType.User, user_guid, string.Empty);
                var origin_doc = getOriginDocBase<NicknameAttribute>();
                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<NicknameAttrib>();
            NullReferenceCheckHelper.throwIfNull(to_copy_doc_attrib, () => $"to_copy_doc_attrib is null !!!");

            to_copy_doc_attrib.Nickname = Nickname;

            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, to_query_doc);
            }

            return (result, to_query_doc);
        }

        public Result onMerge(EntityAttributeBase otherEntityAttribute)
        {
            var result = new Result();
            var err_msg = string.Empty;
            var owner = getOwner();
            NullReferenceCheckHelper.throwIfNull(owner, () => $"owner is null !!!");

            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 nickname_attribute = otherEntityAttribute as NicknameAttribute;
            if (null == nickname_attribute)
            {
                err_msg = $"Failed to cast NicknameAttribute !!!, nickname_attribute is null";
                result.setFail(ServerErrorCode.ClassTypeCastIsNull, err_msg);
                Log.getLogger().error(result.toBasicString());

                return result;
            }
            
            Nickname = nickname_attribute.Nickname;

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

            var origin_doc_base = getOriginDocBase<NicknameAttribute>();
            if (null == origin_doc_base)
            {
                // DB 에 저장되어 있지 않는 경우 OriginDoc은 null 이다 !!!
                return result;
            }

            var nickname_attrib = origin_doc_base.getAttrib<NicknameAttrib>();
            NullReferenceCheckHelper.throwIfNull(nickname_attrib, () => $"nickname_attrib is null !!! - {owner.toBasicString()}");

            nickname_attrib.Nickname = Nickname;
                
            return result;
        }

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

            var to_cast_string = typeof(NicknameDoc).Name;

            var nickame_doc_base = docBase as NicknameDoc;
            if (null == nickame_doc_base)
            {
                err_msg = $"Failed to copyEntityAttributeFromDoc() !!!, nickame_doc_base is null :{to_cast_string}";
                Log.getLogger().error(err_msg);
                return false;
            }
            
            //=====================================================================================
            // New Doc => Origin Doc
            //=====================================================================================
            syncOriginDocBaseWithNewDoc<NicknameAttribute>(nickame_doc_base);
            
            //=====================================================================================
            // Doc => Attribute
            //=====================================================================================
            var nickname_attrib = nickame_doc_base.getAttrib<NicknameAttrib>();
            NullReferenceCheckHelper.throwIfNull(nickname_attrib, () => $"nickname_attrib is null !!!");

            Nickname = nickname_attrib.Nickname;

            return true;
        }
    }

    public class NicknameAttributeTransactor : EntityAttributeTransactorBase<NicknameAttribute>, ICopyEntityAttributeTransactorFromEntityAttribute
    {
        public NicknameAttributeTransactor(EntityBase owner)
            : base(owner)
        {
        }

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

            var to_cast_string = typeof(NicknameAttribute).Name;

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

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

            copy_to_nickname_attribute.Nickname = copy_from_nickname_attribute.Nickname;

            return true;
        }
    }

}