public static async Task <HttpResponseMessage> RunAsync([HttpTrigger(AuthorizationLevel.Anonymous, "patch",
                                                                             Route = "Customers/{customerId}")] HttpRequestMessage req, ILogger log, string customerId,
                                                                [Inject] IResourceHelper resourceHelper,
                                                                [Inject] IHttpRequestMessageHelper httpRequestMessageHelper,
                                                                [Inject] IValidate validate,
                                                                [Inject] IPatchCustomerHttpTriggerService customerPatchService)
        {
            var touchpointId = httpRequestMessageHelper.GetTouchpointId(req);

            if (string.IsNullOrEmpty(touchpointId))
            {
                log.LogInformation("Unable to locate 'APIM-TouchpointId' in request header");
                return(HttpResponseMessageHelper.BadRequest());
            }

            var ApimURL = httpRequestMessageHelper.GetApimURL(req);

            if (string.IsNullOrEmpty(ApimURL))
            {
                log.LogInformation("Unable to locate 'apimurl' in request header");
                return(HttpResponseMessageHelper.BadRequest());
            }

            log.LogInformation("Apimurl:  " + ApimURL);

            log.LogInformation("C# HTTP trigger function Patch Customer processed a request. By Touchpoint " + touchpointId);

            if (!Guid.TryParse(customerId, out var customerGuid))
            {
                return(HttpResponseMessageHelper.BadRequest(customerGuid));
            }

            Models.CustomerPatch customerPatchRequest;

            try
            {
                customerPatchRequest = await httpRequestMessageHelper.GetCustomerFromRequest <Models.CustomerPatch>(req);
            }
            catch (JsonException ex)
            {
                return(HttpResponseMessageHelper.UnprocessableEntity(ex));
            }

            if (customerPatchRequest == null)
            {
                return(HttpResponseMessageHelper.UnprocessableEntity(req));
            }

            customerPatchRequest.LastModifiedTouchpointId = touchpointId;

            // validate the request
            var errors = validate.ValidateResource(customerPatchRequest, false);

            if (errors.Any())
            {
                return(HttpResponseMessageHelper.UnprocessableEntity(errors));
            }

            var doesCustomerExist = await resourceHelper.DoesCustomerExist(customerGuid);

            if (!doesCustomerExist)
            {
                return(HttpResponseMessageHelper.NoContent(customerGuid));
            }

            var isCustomerReadOnly = await resourceHelper.IsCustomerReadOnly(customerGuid);

            if (isCustomerReadOnly)
            {
                return(HttpResponseMessageHelper.Forbidden(customerGuid));
            }

            var customer = await customerPatchService.GetCustomerByIdAsync(customerGuid);

            if (customer == null)
            {
                return(HttpResponseMessageHelper.NoContent(customerGuid));
            }

            var patchedCustomer = customerPatchService.PatchResource(customer, customerPatchRequest);

            if (string.IsNullOrEmpty(patchedCustomer))
            {
                return(HttpResponseMessageHelper.NoContent(customerGuid));
            }

            var updatedCustomer = await customerPatchService.UpdateCosmosAsync(patchedCustomer, customerGuid);

            if (updatedCustomer != null)
            {
                await customerPatchService.SendToServiceBusQueueAsync(customerPatchRequest, customerGuid, ApimURL);
            }

            return(updatedCustomer == null?
                   HttpResponseMessageHelper.BadRequest(customerGuid) :
                       HttpResponseMessageHelper.Ok(JsonHelper.SerializeObject(updatedCustomer)));
        }
        public static async Task <HttpResponseMessage> RunAsync([HttpTrigger(AuthorizationLevel.Anonymous, "post", Route = "Customers/")] HttpRequestMessage req, ILogger log,
                                                                [Inject] IResourceHelper resourceHelper,
                                                                [Inject] IHttpRequestMessageHelper httpRequestMessageHelper,
                                                                [Inject] IValidate validate,
                                                                [Inject] IPostCustomerHttpTriggerService customerPostService)
        {
            var touchpointId = httpRequestMessageHelper.GetTouchpointId(req);

            if (string.IsNullOrEmpty(touchpointId))
            {
                log.LogInformation("Unable to locate 'APIM-TouchpointId' in request header");
                return(HttpResponseMessageHelper.BadRequest());
            }

            var ApimURL = httpRequestMessageHelper.GetApimURL(req);

            if (string.IsNullOrEmpty(ApimURL))
            {
                log.LogInformation("Unable to locate 'apimurl' in request header");
                return(HttpResponseMessageHelper.BadRequest());
            }


            log.LogInformation("C# HTTP trigger function Post Customer processed a request. By Touchpoint " + touchpointId);

            Models.Customer customerRequest;

            try
            {
                customerRequest = await httpRequestMessageHelper.GetCustomerFromRequest <Models.Customer>(req);
            }
            catch (JsonException ex)
            {
                return(HttpResponseMessageHelper.UnprocessableEntity(ex));
            }

            if (customerRequest == null)
            {
                return(HttpResponseMessageHelper.UnprocessableEntity(req));
            }

            customerRequest.LastModifiedTouchpointId = touchpointId;

            var errors = validate.ValidateResource(customerRequest, true);

            if (errors.Any())
            {
                return(HttpResponseMessageHelper.UnprocessableEntity(errors));
            }

            var customer = await customerPostService.CreateNewCustomerAsync(customerRequest);

            log.LogInformation("Apimurl:  " + ApimURL);

            if (customer != null)
            {
                await customerPostService.SendToServiceBusQueueAsync(customer, ApimURL.ToString());
            }

            return(customer == null
                ? HttpResponseMessageHelper.BadRequest()
                : HttpResponseMessageHelper.Created(JsonHelper.SerializeObject(customer)));
        }