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


using Newtonsoft.Json;


using ServerCore; using ServerBase;
using ServerControlCenter;


using META_ID = System.UInt32;
using USER_GUID = System.String;
using Amazon.S3.Model;


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

        [JsonProperty]
        public META_ID MyhomeMetaId { get; set; } = 0;

        [JsonProperty]
        public string MyhomeName { get; set; } = string.Empty;
        
        [JsonProperty]
        public UInt16 SelectedFlag { get; set; } = 0;


        public string MyhomeUgcInfoS3FileName { get; set; } = string.Empty;

        public MyhomeUgcInfo UgcInfo { get; set; } = new();

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

        public override void newEntityAttribute()
        {
            MyhomeGuid = System.Guid.NewGuid().ToString("N");
            base.newEntityAttribute();
        }

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

        public override void onClear()
        {

            MyhomeGuid = string.Empty;
            MyhomeMetaId = 0;
            MyhomeName = string.Empty;
            SelectedFlag = 0;
            MyhomeUgcInfoS3FileName = string.Empty;
            UgcInfo = new();

            getAttributeState().reset();
        }

        public override EntityAttributeBase onCloned()
        {
            var cloned = new MyhomeAttribute(getOwner());

            cloned.deepCopyFromBase(this);

            cloned.MyhomeGuid = MyhomeGuid;
            cloned.MyhomeMetaId = MyhomeMetaId;
            cloned.MyhomeName = MyhomeName;
            cloned.SelectedFlag = SelectedFlag;
            cloned.MyhomeUgcInfoS3FileName = MyhomeUgcInfoS3FileName;
            cloned.UgcInfo = UgcInfo.Clone();

            return cloned;
        }

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

            var owner = getOwner();
            ArgumentNullReferenceCheckHelper.throwIfNull(owner);

            var user_attribute = owner.onGetMasterEntity()!.getEntityAttribute<UserAttribute>();
            NullReferenceCheckHelper.throwIfNull(user_attribute, () => $"user_attribute is null !!! - {owner.toBasicString()}");

            USER_GUID user_guid = user_attribute.UserGuid;

            //=====================================================================================
            // Attribute => try pending Doc
            //=====================================================================================
            var try_pending_doc = getTryPendingDocBase() as MyhomeDoc;
            if (null == try_pending_doc)
            {
                var to_copy_doc = new MyhomeDoc(user_guid, MyhomeGuid);

                var origin_doc = getOriginDocBase<MyhomeAttribute>();
                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<MyHomeAttrib>();
            ArgumentNullException.ThrowIfNull(to_copy_doc_attrib);

            to_copy_doc_attrib.MyhomeGuid = MyhomeGuid;
            to_copy_doc_attrib.MyHomeMetaId = MyhomeMetaId;
            to_copy_doc_attrib.MyhomeName = MyhomeName;
            to_copy_doc_attrib.SelectedFlag = SelectedFlag;
            to_copy_doc_attrib.MyhomeUgcInfoS3FileName = MyhomeUgcInfoS3FileName;

            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(MyhomeDoc).Name;

            var myhome_doc_base = docBase as MyhomeDoc;
            if (null == myhome_doc_base)
            {
                err_msg = $"Failed to copyEntityAttributeFromDoc() !!!, myhome_doc_base is null :{to_cast_string}";
                Log.getLogger().error(err_msg);
                return false;
            }

            //=====================================================================================
            // New Doc => Origin Doc
            //=====================================================================================
            syncOriginDocBaseWithNewDoc<MyhomeAttribute>(myhome_doc_base);

            //=====================================================================================
            // Doc => Attribute
            //=====================================================================================
            var doc_attrib = myhome_doc_base.getAttrib<MyHomeAttrib>();
            ArgumentNullException.ThrowIfNull(doc_attrib);

            MyhomeGuid = doc_attrib.MyhomeGuid;
            MyhomeMetaId = doc_attrib.MyHomeMetaId;
            MyhomeName = doc_attrib.MyhomeName;
            SelectedFlag = doc_attrib.SelectedFlag;
            MyhomeUgcInfoS3FileName = doc_attrib.MyhomeUgcInfoS3FileName;

            return true;
        }

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

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

                return result; 
            }

            MyhomeGuid = myhome_attribute.MyhomeGuid;
            MyhomeMetaId = myhome_attribute.MyhomeMetaId;
            MyhomeName = myhome_attribute.MyhomeName;
            SelectedFlag = myhome_attribute.SelectedFlag;
            MyhomeUgcInfoS3FileName = myhome_attribute.MyhomeUgcInfoS3FileName;
            UgcInfo = myhome_attribute.UgcInfo.Clone();

            //=====================================================================================
            // Attribute Try Pending Doc => Origin Doc
            //=====================================================================================
            var try_pending_doc = myhome_attribute.getTryPendingDocBase() as MyhomeDoc;
            if (null != try_pending_doc)
            {
                myhome_attribute.resetTryPendingDocBase();

                syncOriginDocBaseWithNewDoc<MyhomeAttribute>(try_pending_doc);
            }

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

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

            my_home_attrib.MyhomeGuid = MyhomeGuid;
            my_home_attrib.MyHomeMetaId = MyhomeMetaId;
            my_home_attrib.MyhomeName = MyhomeName;
            my_home_attrib.SelectedFlag = SelectedFlag;
            my_home_attrib.MyhomeUgcInfoS3FileName = MyhomeUgcInfoS3FileName;

            return result;
        }
    }

    public class MyhomeAttributeTransactor : EntityAttributeTransactorBase<MyhomeAttribute>, ICopyEntityAttributeTransactorFromEntityAttribute
    {
        public MyhomeAttributeTransactor(EntityBase owner)
            : base(owner)
        {
        }

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

            var to_cast_string = typeof(MyhomeAttribute).Name;

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

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

            copy_to_myhome_attribute.MyhomeGuid = copy_from_myhome_attribute.MyhomeGuid;
            copy_to_myhome_attribute.MyhomeMetaId = copy_from_myhome_attribute.MyhomeMetaId;
            copy_to_myhome_attribute.MyhomeName = copy_from_myhome_attribute.MyhomeName;
            copy_to_myhome_attribute.SelectedFlag = copy_from_myhome_attribute.SelectedFlag;
            copy_to_myhome_attribute.MyhomeUgcInfoS3FileName = copy_from_myhome_attribute.MyhomeUgcInfoS3FileName;
            copy_to_myhome_attribute.UgcInfo = copy_from_myhome_attribute.UgcInfo.Clone();

            return true;
        }
    }
}