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


using Google.Protobuf.WellKnownTypes;
using Newtonsoft.Json;


using ServerCore; using ServerBase;


namespace ServerCommon
{
    public class EndQuestAttribute : EntityAttributeBase, ICopyEntityAttributeFromDoc, IMergeWithEntityAttribute
    {
        [JsonProperty]
        public UInt32 QuestId { get; set; } = 0;
        [JsonProperty]
        public UInt32 QuestRevision { get; set; } = 0;
        [JsonProperty]
        public Int32 EndCount { get; set; } = 0;
        [JsonProperty]
        public DateTime LastEndTime { get; set; } = DateTimeHelper.MinTime;
        [JsonProperty]
        public string m_user_guid { get; set; } = string.Empty;


        public EndQuestAttribute( EntityBase owner
                                , string userGuid, UInt32 questId, UInt32 questRevision
                                , EntityBase entityOfOwnerEntityType )
            : base(owner, entityOfOwnerEntityType)
        {
            m_user_guid = userGuid;
            QuestId = questId;
            QuestRevision = questRevision;
        }

        public override void onClear()
        {
            m_user_guid = string.Empty;
            QuestId = 0;
            QuestRevision = 0;
            EndCount = 0;
            LastEndTime = DateTimeHelper.MinTime;

            getAttributeState().reset();
        }

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

            var end_quest_attribute = owner.getEntityAttribute<EndQuestAttribute>();
            NullReferenceCheckHelper.throwIfNull(end_quest_attribute, () => $"end_quest_attribute is null !!!");

            var result = new Result();

            //=====================================================================================
            // Attribute => try pending Doc
            //=====================================================================================
            var try_pending_doc = getTryPendingDocBase() as EndQuestDoc;
            if (null == try_pending_doc)
            {
                var to_copy_doc = new EndQuestDoc(m_user_guid, QuestId, QuestRevision);

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

                try_pending_doc = to_copy_doc;

                setTryPendingDocBase(try_pending_doc);
            }
            
            var to_copy_quest_attrib = try_pending_doc.getAttrib<EndQuestAttrib>();
            NullReferenceCheckHelper.throwIfNull(to_copy_quest_attrib, () => $"to_copy_quest_attrib is null !!!");

            to_copy_quest_attrib.m_quest_id = end_quest_attribute.QuestId;
            to_copy_quest_attrib.m_quest_revision = end_quest_attribute.QuestRevision;
            to_copy_quest_attrib.m_end_count = end_quest_attribute.EndCount;
            to_copy_quest_attrib.m_last_end_time = end_quest_attribute.LastEndTime;

            if (false == isForQuery)
            {
                return (result, try_pending_doc);
            }

            //=====================================================================================
            // Doc QueryType 반영
            //=====================================================================================
            (result, var to_query_docs) = await applyDoc4Query(try_pending_doc);
            if (result.isFail())
            {
                return (result, to_query_docs);
            }

            return (result, to_query_docs);
        }

        public override EntityAttributeBase onCloned()
        {
            var entity_of_owner_entity_type = getEntityOfOwnerEntityType();
            NullReferenceCheckHelper.throwIfNull(entity_of_owner_entity_type, () => $"entity_of_owner_entity_type is null !!!");

            var cloned = new EndQuestAttribute( getOwner()
                                              , m_user_guid, QuestId, QuestRevision
                                              , entity_of_owner_entity_type );
            cloned.deepCopyFromBase(this);
            cloned.QuestId = QuestId;
            cloned.QuestRevision = QuestRevision;
            cloned.EndCount = EndCount;
            cloned.LastEndTime = LastEndTime;
            return cloned;
        }

        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;
            }

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

                return result;
            }

            //=====================================================================================
            // OtherAttribute => Attribute
            //=====================================================================================
            QuestId = other_attribute.QuestId;
            QuestRevision = other_attribute.QuestRevision;
            EndCount = other_attribute.EndCount;
            LastEndTime = other_attribute.LastEndTime;

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

                syncOriginDocBaseWithNewDoc<EndQuestAttribute>(try_pending_doc);
            }

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

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

            end_quest_attrib.m_quest_id = QuestId;
            end_quest_attrib.m_quest_revision = QuestRevision;
            end_quest_attrib.m_end_count = EndCount;
            end_quest_attrib.m_last_end_time = LastEndTime;

            return result;
        }

        public bool copyEntityAttributeFromDoc(DynamoDbDocBase customDoc)
        {
            return false;
        }

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

    public class EndQuestAtrributeTransactor : EntityAttributeTransactorBase<EndQuestAttribute>
    {
        public EndQuestAtrributeTransactor(EntityBase owner)
            : base(owner)
        {
        }

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