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


using Amazon.OpenSearchService.Model.Internal.MarshallTransformations;
using Google.Protobuf.WellKnownTypes;
using Newtonsoft.Json;


using ServerControlCenter;
using ServerCore; using ServerBase;
using System.Collections.Concurrent;


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


namespace ServerCommon
{

    public class FriendAttribute : EntityAttributeBase, ICopyEntityAttributeFromDoc, IMergeWithEntityAttribute
    {
        [JsonProperty]
        public USER_GUID UserGuid { get; set; } = string.Empty;
        [JsonProperty]
        public USER_GUID FriendGuid { get; set; } = string.Empty;
        [JsonProperty]
        public string Nickname { get; set; } = string.Empty;
        
        public string FolderName { get; set; } = string.Empty;

        public Int32 IsNew { get; set; } = 0;
        [JsonProperty]
        public DateTime CreateTime { get; set; } = DateTimeHelper.MinTime;

        public Int16 IsChannel { get; set; } = 0; //1:채널서버, 0:인스턴스 서버
        
        public Int32 Id { get; set; } = 0;

        public Int32 ChannelNumber { get; set; } = 0;
        
        public Int32 Language { get; set; } = 0;
        

        public FriendAttribute( EntityBase owner
                              , string userGuid, EntityBase entityOfOwnerEntityType) 
            : base(owner, entityOfOwnerEntityType)
        {
            UserGuid = userGuid;
        }

        public override void onClear()
        {
            UserGuid = string.Empty;
            FriendGuid = string.Empty;
            Nickname = string.Empty;
            FolderName = string.Empty;
            IsNew = 0;
            CreateTime = new();
            IsChannel = 0;
            Id = 0;
            ChannelNumber = 0;
            Language = 0;

            getAttributeState().reset();
        }

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

            var result = new Result();

            var user_guid = UserGuid;

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

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

                try_pending_doc = to_copy_doc;

                setTryPendingDocBase(try_pending_doc);
            }

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

            to_copy_friend_attrib.FriendGuid = FriendGuid;
            to_copy_friend_attrib.FolderName = FolderName;
            to_copy_friend_attrib.IsNew = IsNew;
            to_copy_friend_attrib.CreateTime = CreateTime;

            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 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 FriendAttribute(owner, UserGuid, entity_of_owner_entity_type);

            cloned.deepCopyFromBase(this);

            cloned.FriendGuid = FriendGuid;
            cloned.Nickname = Nickname;
            cloned.FolderName = FolderName;
            cloned.IsNew = IsNew;
            cloned.CreateTime = CreateTime;
            cloned.IsChannel = IsChannel;
            cloned.Id = Id;
            cloned.ChannelNumber = ChannelNumber;
            cloned.Language = Language;

            return cloned;
        }

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

            var result = new Result();

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

                return result;
            }
            
            //=====================================================================================
            // OtherAttribute => Attribute
            //=====================================================================================
            UserGuid = other_attribute.UserGuid;
            FriendGuid = other_attribute.FriendGuid;
            FolderName = other_attribute.FolderName;
            Nickname = other_attribute.Nickname;
            IsNew = other_attribute.IsNew;
            CreateTime = other_attribute.CreateTime;
            IsChannel = other_attribute.IsChannel;
            Id = other_attribute.Id;
            ChannelNumber = other_attribute.ChannelNumber;
            Language = other_attribute.Language;

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

                syncOriginDocBaseWithNewDoc<FriendAttribute>(try_pending_doc);
            }

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

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

            return result;
        }

        public bool copyEntityAttributeFromDoc(DynamoDbDocBase? docBase)
        {
            var friend_doc_base = docBase as FriendDoc;
            if (null == friend_doc_base)
            {
                var to_cast_string = typeof(FriendDoc).Name;
                var err_msg = $"Failed to copyEntityAttributeFromDoc() !!!, friend_doc_base is null :{to_cast_string}";
                Log.getLogger().error(err_msg);
                return false;
            }

            //=====================================================================================
            // New Doc => Origin Doc
            //=====================================================================================
            syncOriginDocBaseWithNewDoc<FriendAttribute>(friend_doc_base);

            //=====================================================================================
            // Doc => Attribute
            //=====================================================================================
            var doc_attrib = friend_doc_base.getAttrib<FriendAttrib>();
            NullReferenceCheckHelper.throwIfNull(doc_attrib, () => $"doc_attrib is null !!!");

            FriendGuid = doc_attrib.FriendGuid;
            FolderName = doc_attrib.FolderName;
            IsNew = doc_attrib.IsNew;
            CreateTime = doc_attrib.CreateTime;

            return true;
        }

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

    public class FriendsAttributeTransactor : EntityAttributeTransactorBase<FriendAttribute>, ICopyEntityAttributeTransactorFromEntityAttribute
    {
        public FriendsAttributeTransactor(EntityBase owner)
            : base(owner)
        {
        }

        public bool copyEntityAttributeTransactorFromEntityAttribute(EntityAttributeBase entityAttributeBase)
        {
            //아직 미사용
            Log.getLogger().info("copyEntityDbTransactBaseFromEntityAttribute call");
            return true;
        }
    }
}