using System;
using System.IO;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Runtime.Serialization;
using System.Runtime.Serialization.Formatters.Binary;
using System.Security.Cryptography.Xml;


using Newtonsoft.Json;


using ServerCore; using ServerBase;


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


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

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

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

            getAttributeState().reset();
        }

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

            var cloned = new GameOptionAttribute(owner);
            return cloned;
        }

        public override IEntityAttributeTransactor onNewEntityAttributeTransactor()
        {
            var owner = getOwner() as UserBase;
            NullReferenceCheckHelper.throwIfNull(owner, () => "UserBase is null !!!");

            return new GameOptionAttributeTransactor(owner);
        }

        public override async Task<(Result, DynamoDbDocBase?)> toDocBase(bool isForQuery = true)
        {
            var result = new Result();
  
            var owner = getOwner();
            NullReferenceCheckHelper.throwIfNull(owner, () => "UserBase is null !!!");

            var acoount_attribute = owner.getEntityAttribute<AccountAttribute>();
            NullReferenceCheckHelper.throwIfNull(acoount_attribute, () => $"account attribute is null !!! - {owner.toBasicString()}");

            USER_GUID user_guid = acoount_attribute.UserGuid;

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

                var origin_doc = getOriginDocBase<GameOptionAttribute>();
                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<GameOptionAttrib>();
            NullReferenceCheckHelper.throwIfNull(to_copy_doc_attrib, () => $"game option attrib is null !!! - {owner.toBasicString()}");

            to_copy_doc_attrib.options = options;

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

            var to_cast_string = typeof(GameOptionDoc).Name;

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

            //=====================================================================================
            // New Doc => Origin Doc
            //=====================================================================================
            syncOriginDocBaseWithNewDoc<GameOptionAttribute>(game_option_doc_base);

            //=====================================================================================
            // Doc => Attribute
            //=====================================================================================
            var doc_attrib = game_option_doc_base.getAttrib<GameOptionAttrib>();
            if (doc_attrib == null)
            {
                err_msg = $"Failed to get game option attrib : {nameof(GameOptionAttrib)}";
                result.setFail(ServerErrorCode.EntityAttributeIsNull, err_msg);
                Log.getLogger().error(err_msg);
                return false;
            }

            options = doc_attrib.options;

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

                return result;
            }

            options = game_option_attribute.options;

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

                syncOriginDocBaseWithNewDoc<GameOptionAttribute>(try_pending_doc);
            }

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

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

            game_option_attrib.options = options;

            return result;
        }
    }

    public class GameOptionAttributeTransactor : EntityAttributeTransactorBase<GameOptionAttribute>, ICopyEntityAttributeTransactorFromEntityAttribute
    {
        public GameOptionAttributeTransactor(UserBase owner)
            : base(owner)
        {
        }

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

            var to_cast_string = typeof(GameOptionAttribute).Name;

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

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

            copy_to_game_option_attribute.options = copy_from_game_option_attribute.options;

            return true;
        }
    }
}