/// <summary>
        ///
        /// </summary>
        /// <param name="itemId"></param>
        /// <param name="models"></param>
        /// <param name="language"></param>
        /// <returns></returns>
        public List <ItemResultModel> UpdateItems(string itemId, List <UpdateListIds> models, string language)
        {
            var model = new List <ItemResultModel>();

            var gcItems = new Dictionary <GCItem, string>();

            foreach (var item in models)
            {
                GCItem gcItem = ItemsService.GetSingleItem(item.GCId).Data;
                gcItems.Add(gcItem, item.CMSId);
            }

            //var templates = MappingRepository.GetMappings();
            var templatesDictionary = new Dictionary <int, GCTemplate>();

            foreach (var item in gcItems)
            {
                GCItem gcItem            = item.Key;      //gc item
                string cmsId             = item.Value;    // corresponding cms id
                var    itemResponseModel = new ItemResultModel
                {
                    IsImportSuccessful = true,
                    ImportMessage      = "Update Successful"
                };
                if (!string.IsNullOrEmpty(GcAccountSettings.GatherContentUrl))
                {
                    itemResponseModel.GcLink = string.Concat(GcAccountSettings.GatherContentUrl, "/item/", gcItem.Id);
                }
                itemResponseModel.GcItem = new GcItemModel
                {
                    Id    = gcItem.Id.ToString(),
                    Title = gcItem.Name
                };

                itemResponseModel.Status = new GcStatusModel
                {
                    Color = gcItem.Status.Data.Color,
                    Name  = gcItem.Status.Data.Name,
                };

                GCTemplate gcTemplate;
                int        templateId = gcItem.TemplateId.Value;
                templatesDictionary.TryGetValue(templateId, out gcTemplate);
                if (gcTemplate == null)
                {
                    gcTemplate = TemplatesService.GetSingleTemplate(templateId.ToString()).Data;
                    templatesDictionary.Add(templateId, gcTemplate);
                }

                itemResponseModel.GcTemplate = new GcTemplateModel
                {
                    Id   = gcTemplate.Id.ToString(),
                    Name = gcTemplate.Name
                };
                string cmsLink = ItemsRepository.GetCmsItemLink(HttpContext.Current.Request.Url.Scheme, HttpContext.Current.Request.Url.Host, cmsId);
                itemResponseModel.CmsLink = cmsLink;
                itemResponseModel.CmsId   = cmsId;

                //MappingResultModel cmsItem;
                //TryMapItem(gcItem, gcTemplate, templates, out cmsItem);
                //result.Add(cmsItem);
                List <Element> gcFields = gcItem.Config.SelectMany(i => i.Elements).ToList();

                //var templateMapping = templates.First(x => x.GcTemplate.GcTemplateId == gcItem.TemplateId.ToString());

                var templateMapping = MappingRepository.GetMappingByItemId(cmsId, language);
                if (templateMapping != null)                 // template found, now map fields here
                {
                    var gcContentIdField = templateMapping.FieldMappings.FirstOrDefault(fieldMapping => fieldMapping.CmsField.TemplateField.FieldName == "GC Content Id");
                    if (gcContentIdField != null)
                    {
                        templateMapping.FieldMappings.Remove(gcContentIdField);
                    }

                    var files = new List <File>();
                    if (gcItem.Config.SelectMany(config => config.Elements).Any(element => element.Type == "files"))
                    {
                        foreach (var file in ItemsService.GetItemFiles(gcItem.Id.ToString()).Data)
                        {
                            files.Add(new File
                            {
                                FileName    = file.FileName,
                                Url         = file.Url,
                                FieldId     = file.Field,
                                UpdatedDate = file.Updated,
                                FileId      = file.Id
                            });
                        }
                    }

                    bool fieldError = CheckFieldError(templateMapping, gcFields, files, itemResponseModel);

                    if (!fieldError)
                    {
                        var cmsContentIdField = new FieldMapping
                        {
                            CmsField = new CmsField
                            {
                                TemplateField = new CmsTemplateField {
                                    FieldName = "GC Content Id"
                                },
                                Value = gcItem.Id.ToString()
                            }
                        };
                        templateMapping.FieldMappings.Add(cmsContentIdField);

                        var cmsItem = new CmsItem
                        {
                            Template = templateMapping.CmsTemplate,
                            Title    = gcItem.Name,
                            Fields   = templateMapping.FieldMappings.Select(x => x.CmsField).ToList(),
                            Language = language,
                            Id       = cmsId
                        };

                        var fieldMappings = templateMapping.FieldMappings;

                        // one CMS text field can be mapped to several GC fields
                        // in this case we concatenate their texts and put into one CMS field
                        foreach (IGrouping <string, FieldMapping> fields in fieldMappings.GroupBy(f => f.CmsField.TemplateField.FieldName))
                        {
                            FieldMapping field = fields.First();
                            if (field.GcField != null)
                            {
                                switch (field.GcField.Type)
                                {
                                case "choice_radio":
                                case "choice_checkbox":
                                {
                                    ItemsRepository.MapChoice(cmsItem, field.CmsField);
                                }
                                break;

                                case "files":
                                {
                                    ItemsRepository.ResolveAttachmentMapping(cmsItem, field.CmsField);
                                }
                                break;

                                default:
                                {
                                    if (field.CmsField.TemplateField.FieldType == "Datetime" || field.CmsField.TemplateField.FieldType == "Date")
                                    {
                                        ItemsRepository.MapDateTime(cmsItem, field.CmsField);
                                    }
                                    else
                                    {
                                        if (fields.Count() > 1)
                                        {
                                            field.CmsField.Value = string.Join("\r\n", fields.Select(f => f.CmsField.Value.ToString()));
                                        }

                                        ItemsRepository.MapText(cmsItem, field.CmsField);
                                    }
                                }
                                break;
                                }
                            }
                        }

                        var cmsSyncDateField = new CmsField
                        {
                            TemplateField = new CmsTemplateField {
                                FieldName = "Last Sync Date"
                            },
                            Value = DateTime.UtcNow.ToString("yyyyMMddTHHmmss")
                        };

                        ItemsRepository.MapText(cmsItem, cmsSyncDateField);
                    }
                }
                else
                {
                    //no template mapping, set error message
                    itemResponseModel.ImportMessage      = "Update failed: Template not mapped";
                    itemResponseModel.IsImportSuccessful = false;
                }
                model.Add(itemResponseModel);
            }

            return(model);
        }