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


using Newtonsoft.Json;


using ServerCore; using ServerBase;


using META_ID = System.UInt32;
using ALERT_KEY = System.String;
using OWNER_GUID = System.String;


namespace ServerCommon
{
    public class EntityAlertRecordAttribute : EntityAttributeBase, ICopyEntityAttributeFromDoc, IMergeWithEntityAttribute
    {
        [JsonProperty]
        public ALERT_KEY AlertKey { get; set; } = string.Empty;
        [JsonProperty]
        public DateTime AlertedTime { get; set; } = DateTimeHelper.MinTime;

        [JsonProperty]
        public OwnerEntityType OwnerEntityType { get; set; } = OwnerEntityType.None;
        [JsonProperty]
        public OWNER_GUID OwnerGuid { get; set; } = string.Empty;

        [JsonProperty]
        public EntityAlertTriggerType EntityAlertTriggerType { get; set; } = EntityAlertTriggerType.None;
        [JsonProperty]
        public META_ID MetaId { get; set; } = 0;

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

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

        public override void onClear()
        {
            AlertKey = string.Empty;
            AlertedTime = DateTimeHelper.MinTime;
            OwnerEntityType = OwnerEntityType.None;
            OwnerGuid = string.Empty;
            EntityAlertTriggerType = EntityAlertTriggerType.None;
            MetaId = 0;

            getAttributeState().reset();
        }

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

            var cloned = new EntityAlertRecordAttribute(getOwner(), owner_entity_type);

            cloned.deepCopyFromBase(this);

            cloned.AlertKey = AlertKey;
            cloned.AlertedTime = AlertedTime;
            cloned.OwnerEntityType = OwnerEntityType;
            cloned.OwnerGuid = OwnerGuid;
            cloned.EntityAlertTriggerType = EntityAlertTriggerType;
            cloned.MetaId = MetaId;

            return cloned;
        }

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

            var owner = getOwner();
            NullReferenceCheckHelper.throwIfNull(owner, () => "owner is null !!!");

            var owner_entity_type = owner.onGetOwnerEntityType();
            var owner_guid = owner.onGetGuidOfOwnerEntityType();

            //=====================================================================================
            // Attribute => try pending Doc
            //=====================================================================================
            var try_pending_doc = getTryPendingDocBase() as EntityAlertRecordDoc;
            if (null == try_pending_doc)
            {
                var to_copy_doc = new EntityAlertRecordDoc( owner_guid, EntityAlertRecordDoc.makeALERT_KEY(EntityAlertTriggerType, MetaId), AlertedTime
                                                          , owner_entity_type, EntityAlertTriggerType, MetaId );

                var origin_doc = getOriginDocBase<EntityAlertRecordAttribute>();
                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<EntityAlertRecordAttrib>();
            NullReferenceCheckHelper.throwIfNull(to_copy_doc_attrib, () => $"to_copy_doc_attrib is null !!! - {owner.toBasicString()}");

            to_copy_doc_attrib.AlertKey = AlertKey;
            to_copy_doc_attrib.AlertedTime = AlertedTime;
            to_copy_doc_attrib.OwnerEntityType = OwnerEntityType;
            to_copy_doc_attrib.OwnerGuid = OwnerGuid;
            to_copy_doc_attrib.EntityAlertTriggerType = EntityAlertTriggerType;
            to_copy_doc_attrib.MetaId = MetaId;

            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, null);
            }

            return (result, to_query_docs);
        }

        public bool copyEntityAttributeFromDoc(DynamoDbDocBase? docBase)
        {
            var err_msg = string.Empty;

            var to_cast_string = typeof(EntityAlertRecordDoc).Name;

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

            //=====================================================================================
            // New Doc => Origin Doc
            //=====================================================================================
            syncOriginDocBaseWithNewDoc<EntityAlertRecordAttribute>(alert_record_doc);

            //=====================================================================================
            // Doc => Attribute
            //=====================================================================================
            var doc_attrib = alert_record_doc.getAttrib<EntityAlertRecordAttrib>();
            NullReferenceCheckHelper.throwIfNull(doc_attrib, () => $"doc_attrib is null !!! - {getOwner().toBasicString()}");
            
            AlertKey = doc_attrib.AlertKey;
            AlertedTime = doc_attrib.AlertedTime;
            OwnerEntityType = doc_attrib.OwnerEntityType;
            OwnerGuid = doc_attrib.OwnerGuid;
            EntityAlertTriggerType = doc_attrib.EntityAlertTriggerType;
            MetaId = doc_attrib.MetaId;

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

                return result;
            }

            AlertKey = alert_record_attribute.AlertKey;
            AlertedTime = alert_record_attribute.AlertedTime;
            OwnerEntityType = alert_record_attribute.OwnerEntityType;
            OwnerGuid = alert_record_attribute.OwnerGuid;
            EntityAlertTriggerType = alert_record_attribute.EntityAlertTriggerType;
            MetaId = alert_record_attribute.MetaId;

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

                syncOriginDocBaseWithNewDoc<EntityAlertRecordAttribute>(try_pending_doc);
            }

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

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

            alert_record_attrib.AlertKey = AlertKey;
            alert_record_attrib.AlertedTime = AlertedTime;
            alert_record_attrib.OwnerEntityType = OwnerEntityType;
            alert_record_attrib.OwnerGuid = OwnerGuid;
            alert_record_attrib.EntityAlertTriggerType = EntityAlertTriggerType;
            alert_record_attrib.MetaId = MetaId;

            return result;
        }
    }

    public class EntityAlertHistoryAttributeTransactor : EntityAttributeTransactorBase<EntityAlertRecordAttribute>
    {
        public EntityAlertHistoryAttributeTransactor(EntityBase owner)
            : base(owner)
        {
        }
    }
}