public async Task EditAsync()

in Webapp/SDAF/Controllers/SystemController.cs [431:525]
85 lines of code
12 McCabe index (conditional complexity)

        public async Task<IActionResult> EditAsync(SystemModel system)
        {
            if (ModelState.IsValid)
            {
                try
                {
                    string newId = Helper.GenerateId(system);
                    if (system.Id == null) system.Id = newId;
                    if (newId != system.Id)
                    {
                        if (String.IsNullOrEmpty(system.Description))
                        {
                            if ((bool)system.database_high_availability || (bool)system.scs_high_availability)
                            {
                                system.Description = system.database_platform + " high availability system on " + system.scs_server_image.publisher + " " + system.scs_server_image.offer + " " + system.scs_server_image.sku;
                            }
                            else
                            {
                                system.Description = system.database_platform + " distributed system on " + system.scs_server_image.publisher + " " + system.scs_server_image.offer + " " + system.scs_server_image.sku;
                            }
                        }
                        system.subscription_id = system.subscription.Replace("/subscriptions/", "");
                        await SubmitNewAsync(system);
                        string id = system.Id;
                        string path = $"/SYSTEM/{id}/{id}.tfvars";
                        string content = Helper.ConvertToTerraform(system);
                        byte[] bytes = Encoding.UTF8.GetBytes(content);

                        AppFile file = new()
                        {
                            Id = WebUtility.HtmlEncode(path),
                            Content = bytes,
                            UntrustedName = path,
                            Size = bytes.Length,
                            UploadDT = DateTime.UtcNow
                        };

                        await _systemService.CreateTFVarsAsync(file);
                        return RedirectToAction("Edit", "System", new { @id = system.Id, @partitionKey = system.environment });  //RedirectToAction("Index");


                    }
                    else
                    {
                        if (system.IsDefault)
                        {
                            await UnsetDefault(system.Id);
                        }
                        if (String.IsNullOrEmpty(system.Description))
                        {
                            if ((bool)system.database_high_availability || (bool)system.scs_high_availability)
                            {
                                system.Description = system.database_platform + " high availability system on " + system.scs_server_image.publisher + " " + system.scs_server_image.offer + " " + system.scs_server_image.sku;
                            }
                            else
                            {
                                system.Description = system.database_platform + " distributed system on " + system.scs_server_image.publisher + " " + system.scs_server_image.offer + " " + system.scs_server_image.sku;
                            }
                        }
                        DateTime currentDateAndTime = DateTime.Now;
                        system.LastModified = currentDateAndTime.ToShortDateString();
                        await _systemService.UpdateAsync(new SystemEntity(system));

                        TempData["success"] = "Successfully updated system " + system.Id;
                        string id = system.Id;
                        string path = $"/SYSTEM/{id}/{id}.tfvars";
                        string content = Helper.ConvertToTerraform(system);
                        byte[] bytes = Encoding.UTF8.GetBytes(content);

                        AppFile file = new()
                        {
                            Id = WebUtility.HtmlEncode(path),
                            Content = bytes,
                            UntrustedName = path,
                            Size = bytes.Length,
                            UploadDT = DateTime.UtcNow
                        };

                        await _systemService.CreateTFVarsAsync(file);
                        return RedirectToAction("Edit", "System", new { @id = system.Id, @partitionKey = system.environment });  //RedirectToAction("Index");
                    }
                }
                catch (Exception e)
                {
                    ModelState.AddModelError("SystemId", "Error editing system: " + e.Message);
                }
            }

            systemView.SapObject = system;

            ViewBag.ValidImageOptions = (imagesOffered.Length != 0);
            ViewBag.ImageOptions = imageOptions;

            return View(systemView);
        }