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


using Amazon.S3.Model;
using Newtonsoft.Json;
using Google.Protobuf.WellKnownTypes;


using ServerCore; using ServerBase;


using USER_GUID = System.String;


namespace ServerCommon
{
    public class LocationAttribute : EntityAttributeBase, ICopyEntityAttributeFromDoc, ICopyEntityAttributeFromCache, IMergeWithEntityAttribute
    {
        [JsonProperty]
        public ChannelServerLocation CurrentChannelServerLoaction { get; set; } = new();
        [JsonProperty]
        public ChannelServerLocation LastestChannelServerLocation { get; set; } = new();


        public IndunLocation ReJoinIndunLocation { get; set; } = new();
        public List<IndunLocation> ReturnIndunLocations { get; set; } = new();
        public IndunLocation EnterIndunLocation { get; set; } = new();
        public IndunLocation CurrentIndunLocation { get; set; } = new();

        public Timestamp MoveChannelTime { get; set; } = DateTimeHelper.MinTime.ToTimestamp();


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

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

        public override void onClear()
        {
            LastestChannelServerLocation.clear();
            ReJoinIndunLocation.clear();
            ReturnIndunLocations.Clear();
            EnterIndunLocation.clear();

            CurrentIndunLocation.clear();
            MoveChannelTime = DateTimeHelper.MinTime.ToTimestamp();

            getAttributeState().reset();
        }

        public override EntityAttributeBase onCloned()
        {
            var cloned = new LocationAttribute(getOwner());

            cloned.deepCopyFromBase(this);

            cloned.LastestChannelServerLocation = LastestChannelServerLocation.clone();
            cloned.ReJoinIndunLocation = ReJoinIndunLocation.clone();
            cloned.ReturnIndunLocations = ReturnIndunLocations.Select(x => x.clone()).ToList();
            cloned.EnterIndunLocation = EnterIndunLocation.clone();

            cloned.CurrentIndunLocation = CurrentIndunLocation.clone();

            cloned.MoveChannelTime = MoveChannelTime;

            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 user_attribute = owner.getRootParent().getEntityAttribute<UserAttribute>();
            NullReferenceCheckHelper.throwIfNull(user_attribute, () => $"user_attribute is null !!! - {owner.toBasicString()}");

            USER_GUID user_guid = user_attribute.UserGuid;

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

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

            to_copy_doc_attrib.LastConnectedChannelServerLocation = LastestChannelServerLocation.clone();
            to_copy_doc_attrib.ReJoinIndunLocation = ReJoinIndunLocation.clone();

            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 err_msg = string.Empty;

            var to_cast_string = typeof(LocationDoc).Name;

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

            //=====================================================================================
            // New Doc => Origin Doc
            //=====================================================================================
            syncOriginDocBaseWithNewDoc<LocationAttribute>(location_doc_base);

            var doc_attrib = location_doc_base.getAttrib<LocationAttrib>();
            NullReferenceCheckHelper.throwIfNull(doc_attrib, () => "doc_attrib is null !!!");

            LastestChannelServerLocation = doc_attrib.LastConnectedChannelServerLocation.clone();
            ReJoinIndunLocation = doc_attrib.ReJoinIndunLocation.clone();

            return true;
        }

        public bool copyEntityAttributeFromCache(CacheBase? cacheBase)
        {
            var err_msg = string.Empty;
            var to_cast_string = typeof(LocationCache).Name;

            var location_cache = cacheBase as LocationCache;
            if (null == location_cache)
            {
                err_msg = $"Failed to copyEntityAttributeFromCache() !!!, location_cache is null :{to_cast_string}";
                Log.getLogger().error(err_msg);
                return false;
            }

            //=====================================================================================
            // Cache => Attribute
            //=====================================================================================
            LastestChannelServerLocation = location_cache.LastestChannelServerLocation.clone();
            ReturnIndunLocations = location_cache.ReturnIndunLocations.Select(x => x.clone()).ToList();
            EnterIndunLocation = location_cache.EnterIndunLocation.clone();
            MoveChannelTime = location_cache.MoveChannelTime;

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

                return result;
            }

            LastestChannelServerLocation = location_attribute.LastestChannelServerLocation.clone();
            ReturnIndunLocations = location_attribute.ReturnIndunLocations.Select(x => x.clone()).ToList();
            EnterIndunLocation = location_attribute.EnterIndunLocation.clone();

            CurrentIndunLocation = location_attribute.CurrentIndunLocation.clone();
            MoveChannelTime = location_attribute.MoveChannelTime;

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

                syncOriginDocBaseWithNewDoc<LocationAttribute>(try_pending_doc);
            }

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

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

            location_attrib.LastConnectedChannelServerLocation = LastestChannelServerLocation.clone();
            location_attrib.ReJoinIndunLocation = ReJoinIndunLocation.clone();

            return result;
        }
    }

    public class LocationAttributeTransactor : EntityAttributeTransactorBase<LocationAttribute>, ICopyEntityAttributeTransactorFromEntityAttribute
    {
        public LocationAttributeTransactor(EntityBase owner)
            : base(owner)
        {
        }

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

            var to_cast_string = typeof(LocationAttribute).Name;

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

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

            copy_to_location_attribute.LastestChannelServerLocation = copy_from_location_attribute.LastestChannelServerLocation.clone();
            copy_to_location_attribute.ReJoinIndunLocation = copy_from_location_attribute.ReJoinIndunLocation.clone();
            copy_to_location_attribute.ReturnIndunLocations = copy_from_location_attribute.ReturnIndunLocations.Select(x => x.clone()).ToList();
            copy_to_location_attribute.EnterIndunLocation = copy_from_location_attribute.EnterIndunLocation.clone();

            copy_to_location_attribute.CurrentIndunLocation = copy_from_location_attribute.CurrentIndunLocation.clone();
            copy_to_location_attribute.MoveChannelTime = copy_from_location_attribute.MoveChannelTime;

            return true;
        }
    }
}