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


using Amazon.Auth.AccessControlPolicy;
using Newtonsoft.Json;


using ServerCore; using ServerBase;


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



namespace ServerCommon
{
    public class FriendFolderAttribute : EntityAttributeBase, ICopyEntityAttributeFromDoc, IMergeWithEntityAttribute
    {
        [JsonProperty]
        public Int16 m_folder_order_type { get; set; } = 0;
        [JsonProperty]
        public ConcurrentDictionary<string, FriendFolder> m_folders { get; set; } = new();

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

        public override void onClear()
        {
            m_folder_order_type = 0;
            m_folders.Clear();
            getAttributeState().reset();
        }

        public void fillNewData()
        {
            FriendFolder folder = new();
            folder.FolderName = Constant.FRIEND_FOLDER_DEFUALT_NAME;
            folder.IsHold = 0;
            folder.HoldTime = DateTimeHelper.Current;
            folder.CreateTime = DateTimeHelper.Current;

            m_folders.TryAdd(folder.FolderName, folder);
        }
            
        public override async Task<(Result, DynamoDbDocBase?)> toDocBase(bool isForQuery = true)
        {
            var owner = getOwner();

            var result = new Result();

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

            USER_GUID user_guid = user_attribute.UserGuid;

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

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

                try_pending_doc = to_copy_doc;

                setTryPendingDocBase(try_pending_doc);
            }

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

            to_copy_friend_folder_attrib.FolderOrderType = m_folder_order_type;
            to_copy_friend_folder_attrib.Folders.Clear();
            foreach (var folder in m_folders.Values)
            {
                FriendFolder copy_folder = new();
                copy_folder.FolderName = folder.FolderName;
                copy_folder.IsHold = folder.IsHold;
                copy_folder.HoldTime = folder.HoldTime;
                copy_folder.CreateTime = folder.CreateTime;
                to_copy_friend_folder_attrib.Folders.TryAdd(copy_folder.FolderName, copy_folder);
            }

            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 cloned = new FriendFolderAttribute(getOwner());
            cloned.deepCopyFromBase(this);

            cloned.m_folder_order_type = m_folder_order_type;
            cloned.m_folders = new();
            foreach (var folder in m_folders)
            {
                FriendFolder new_folder = new();
                new_folder.FolderName = new (folder.Value.FolderName);
                new_folder.IsHold = folder.Value.IsHold;
                new_folder.HoldTime = folder.Value.HoldTime;
                new_folder.CreateTime = folder.Value.CreateTime;
                cloned.m_folders.TryAdd(folder.Key, new_folder);
            }

            return cloned;
        }

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

        public bool copyEntityAttributeFromDoc(DynamoDbDocBase? docBase)
        {
            var result = new Result();
            var err_msg = string.Empty;
            var to_cast_string = typeof(FriendFolderDoc).Name;
            
            var friend_folder_doc = docBase as FriendFolderDoc;
            if (null == friend_folder_doc)
            {
                err_msg = $"Failed to copyEntityAttributeFromDoc() !!!, item_doc_base is null :{to_cast_string}";
                Log.getLogger().error(err_msg);
                return false;
            }

            //=====================================================================================
            // New Doc => Origin Doc
            //=====================================================================================
            syncOriginDocBaseWithNewDoc<FriendFolderAttribute>(friend_folder_doc);

            //=====================================================================================
            // Doc => Attribute
            //=====================================================================================
            var friend_folder_attrib = friend_folder_doc.getAttrib<FriendFolderAttrib>();
            NullReferenceCheckHelper.throwIfNull(friend_folder_attrib, () => $"friend_folder_attrib is null !!!");

            m_folder_order_type = friend_folder_attrib.FolderOrderType;
            
            m_folders = new();
            foreach (var folder in friend_folder_attrib.Folders.Values)
            {
                var clone_folder = new FriendFolder();
                clone_folder.FolderName = folder.FolderName;
                clone_folder.IsHold = folder.IsHold;
                clone_folder.HoldTime = folder.HoldTime;
                clone_folder.CreateTime = folder.CreateTime;

                m_folders.TryAdd(folder.FolderName, clone_folder);
            }

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

                return result;
            }

            m_folder_order_type = other_attribute.m_folder_order_type;
            foreach (var folder in other_attribute.m_folders.Values)
            {
                var clone_folder = new FriendFolder();
                clone_folder.FolderName = folder.FolderName;
                clone_folder.IsHold = folder.IsHold;
                clone_folder.HoldTime = folder.HoldTime;
                clone_folder.CreateTime = folder.CreateTime;
                m_folders.TryAdd(folder.FolderName, clone_folder);
            }

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

                syncOriginDocBaseWithNewDoc<FriendFolderAttribute>(try_pending_doc);
            }

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

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

            friend_folder_attrib.FolderOrderType = m_folder_order_type;
            foreach (var folder in m_folders.Values)
            {
                var clone_folder = new FriendFolder();
                
                clone_folder.FolderName = folder.FolderName;
                clone_folder.IsHold = folder.IsHold;
                clone_folder.HoldTime = folder.HoldTime;
                clone_folder.CreateTime = folder.CreateTime;

                friend_folder_attrib.Folders.TryAdd(folder.FolderName, clone_folder);
            }

            return result;
        }

        
    }


    public class FriendFolderAttributeTransactor : EntityAttributeTransactorBase<FriendFolderAttribute>, ICopyEntityAttributeTransactorFromEntityAttribute
    {
        public FriendFolderAttributeTransactor(EntityBase owner)
            : base(owner)
        {
        }

        public bool copyEntityAttributeTransactorFromEntityAttribute(EntityAttributeBase? entityAttributeBase)
        {
            return true;
        }
    }
}