using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Runtime.InteropServices;
using System.Collections.Concurrent;
using System.Xml.Linq;


using Newtonsoft.Json;
using Microsoft.AspNetCore.DataProtection.KeyManagement;


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;
using UI_KEY = System.String;
using DATA_KEY = System.String;



namespace ServerCommon
{
    //=============================================================================================
    //
    // 클라이언트 UI 전용 DB 저장 정보
    // 
    // - 서버측에서 로직 관여 하지 않는다. (읽기, 쓰기 only)
    // - 추후 String 타입으로 하나의 변수로 저장 하도록 수정 한다. (전용 패킷 추가, 클라이언트와 협의)
    //   
    //=============================================================================================

    public class CustomDefinedUiAttribute : EntityAttributeBase, ICopyEntityAttributeFromDoc, IMergeWithEntityAttribute
    {
        public UI_KEY UiKey { get; set; } = string.Empty;
        public string CustomDefinedUi { get; set; } = string.Empty;


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

        public override IEntityAttributeTransactor onNewEntityAttributeTransactor()
        {
            return new CustomDefinedUiAttributeTransactor(getOwner().getRootParent());
        }

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

            getAttributeState().reset();
        }

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

            var entity_of_owner_entity_type = getEntityOfOwnerEntityType();
            NullReferenceCheckHelper.throwIfNull(entity_of_owner_entity_type, () => $"entity_of_owner_entity_type is null !!!");

            var cloned = new CustomDefinedUiAttribute(owner, entity_of_owner_entity_type);

            cloned.deepCopyFromBase(this);

            cloned.UiKey = UiKey;
            cloned.CustomDefinedUi = CustomDefinedUi;

            return cloned;
        }

        public override async Task<(Result, DynamoDbDocBase?)> toDocBase(bool isForQuery = true)
        {
            var owner = getOwner();
            var parent = owner.getRootParent();

            var result = new Result();
            var err_msg = string.Empty;

            if (false == parent.isValidOwnerEntityType())
            {
                err_msg = $"Invalid OwnerEntityType Invalid !!! - {parent.toBasicString()}";
                result.setFail(ServerErrorCode.OwnerEntityTypeInvalid, err_msg);
                Log.getLogger().error(err_msg);

                return (result, null);
            }

            //=====================================================================================
            // Attribute => try pending Doc
            //=====================================================================================
            var try_pending_doc = getTryPendingDocBase() as CustomDefinedUiDoc;
            if (null == try_pending_doc)
            {
                var to_copy_doc = new CustomDefinedUiDoc( parent.getEntityType().toOwnerEntityType(), parent.onGetDbGuid()
                                                        , UiKey);

                var origin_doc = getOriginDocBase<CustomDefinedUiAttribute>();
                if (null != origin_doc)
                {
                    to_copy_doc.copyTimestampsFromOriginDocBase(origin_doc);
                }

                try_pending_doc = to_copy_doc;

                setTryPendingDocBase(try_pending_doc);
            }

            var to_copy_doc_custom_defined_ui_attrib = try_pending_doc.getAttrib<CustomDefinedUiAttrib>();
            NullReferenceCheckHelper.throwIfNull(to_copy_doc_custom_defined_ui_attrib, () => $"to_copy_doc_custom_defined_ui_attrib is null !!! - {owner.toBasicString()}");

            to_copy_doc_custom_defined_ui_attrib.CustomDefinedUi = CustomDefinedUi;

            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 owner = getOwner();
            var parent = owner.getRootParent();

            var err_msg = string.Empty;

            var to_cast_string = typeof(CustomDefinedUiDoc).Name;

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

            //=====================================================================================
            // New Doc => Origin Doc
            //=====================================================================================
            syncOriginDocBaseWithNewDoc<CustomDefinedUiAttribute>(custom_defined_ui_doc);

            //=====================================================================================
            // Doc => Attribute
            //=====================================================================================
            var doc_custom_defined_ui_attrib = custom_defined_ui_doc.getAttrib<CustomDefinedUiAttrib>();
            NullReferenceCheckHelper.throwIfNull(doc_custom_defined_ui_attrib, () => $"doc_custom_defined_ui_attrib is null !!! - {owner.toBasicString()}");

            UiKey = doc_custom_defined_ui_attrib.UiKey;
            CustomDefinedUi = doc_custom_defined_ui_attrib.CustomDefinedUi;

            return true;
        }

        public Result onMerge(EntityAttributeBase otherEntityAttribute)
        {
            var owner = getOwner();
            var parent = owner.getRootParent();

            var result = new Result();
            var err_msg = string.Empty;

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

                return result;
            }

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

                return result;
            }

            CustomDefinedUi = custom_defined_ui_attribute.CustomDefinedUi;

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

                syncOriginDocBaseWithNewDoc<CustomDefinedUiAttribute>(try_pending_doc);
            }

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

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

            custom_defined_ui_attrib.CustomDefinedUi = CustomDefinedUi;

            return result;
        }
    }

    public class CustomDefinedUiAttributeTransactor : EntityAttributeTransactorBase<CustomDefinedUiAttribute>, ICopyEntityAttributeTransactorFromEntityAttribute
    {
        public CustomDefinedUiAttributeTransactor(EntityBase owner)
            : base(owner)
        {
        }

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

            var to_cast_string = typeof(CustomDefinedUiAttribute).Name;

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

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

            copy_to_custom_defined_ui_attribute.UiKey = copy_from_custom_defined_ui_attribute.UiKey;
            copy_to_custom_defined_ui_attribute.CustomDefinedUi = copy_from_custom_defined_ui_attribute.CustomDefinedUi;

            return true;
        }
    }
}