package compute

// Copyright (c) Microsoft and contributors.  All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
//
// See the License for the specific language governing permissions and
// limitations under the License.
//
// Code generated by Microsoft (R) AutoRest Code Generator.
// Changes may cause incorrect behavior and will be lost if the code is regenerated.

import (
	"context"
	"github.com/Azure/go-autorest/autorest"
	"github.com/Azure/go-autorest/autorest/azure"
	"github.com/Azure/go-autorest/autorest/validation"
	"github.com/Azure/go-autorest/tracing"
	"net/http"
)

// VirtualMachineScaleSetVMsClient is the compute Client
type VirtualMachineScaleSetVMsClient struct {
	BaseClient
}

// NewVirtualMachineScaleSetVMsClient creates an instance of the VirtualMachineScaleSetVMsClient client.
func NewVirtualMachineScaleSetVMsClient(subscriptionID string) VirtualMachineScaleSetVMsClient {
	return NewVirtualMachineScaleSetVMsClientWithBaseURI(DefaultBaseURI, subscriptionID)
}

// NewVirtualMachineScaleSetVMsClientWithBaseURI creates an instance of the VirtualMachineScaleSetVMsClient client
// using a custom endpoint.  Use this when interacting with an Azure cloud that uses a non-standard base URI (sovereign
// clouds, Azure stack).
func NewVirtualMachineScaleSetVMsClientWithBaseURI(baseURI string, subscriptionID string) VirtualMachineScaleSetVMsClient {
	return VirtualMachineScaleSetVMsClient{NewWithBaseURI(baseURI, subscriptionID)}
}

// Deallocate deallocates a specific virtual machine in a VM scale set. Shuts down the virtual machine and releases the
// compute resources it uses. You are not billed for the compute resources of this virtual machine once it is
// deallocated.
// Parameters:
// resourceGroupName - the name of the resource group.
// VMScaleSetName - the name of the VM scale set.
// instanceID - the instance ID of the virtual machine.
func (client VirtualMachineScaleSetVMsClient) Deallocate(ctx context.Context, resourceGroupName string, VMScaleSetName string, instanceID string) (result VirtualMachineScaleSetVMsDeallocateFuture, err error) {
	if tracing.IsEnabled() {
		ctx = tracing.StartSpan(ctx, fqdn+"/VirtualMachineScaleSetVMsClient.Deallocate")
		defer func() {
			sc := -1
			if result.Response() != nil {
				sc = result.Response().StatusCode
			}
			tracing.EndSpan(ctx, sc, err)
		}()
	}
	req, err := client.DeallocatePreparer(ctx, resourceGroupName, VMScaleSetName, instanceID)
	if err != nil {
		err = autorest.NewErrorWithError(err, "compute.VirtualMachineScaleSetVMsClient", "Deallocate", nil, "Failure preparing request")
		return
	}

	result, err = client.DeallocateSender(req)
	if err != nil {
		err = autorest.NewErrorWithError(err, "compute.VirtualMachineScaleSetVMsClient", "Deallocate", result.Response(), "Failure sending request")
		return
	}

	return
}

// DeallocatePreparer prepares the Deallocate request.
func (client VirtualMachineScaleSetVMsClient) DeallocatePreparer(ctx context.Context, resourceGroupName string, VMScaleSetName string, instanceID string) (*http.Request, error) {
	pathParameters := map[string]interface{}{
		"instanceId":        autorest.Encode("path", instanceID),
		"resourceGroupName": autorest.Encode("path", resourceGroupName),
		"subscriptionId":    autorest.Encode("path", client.SubscriptionID),
		"vmScaleSetName":    autorest.Encode("path", VMScaleSetName),
	}

	const APIVersion = "2017-12-01"
	queryParameters := map[string]interface{}{
		"api-version": APIVersion,
	}

	preparer := autorest.CreatePreparer(
		autorest.AsPost(),
		autorest.WithBaseURL(client.BaseURI),
		autorest.WithPathParameters("/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.Compute/virtualMachineScaleSets/{vmScaleSetName}/virtualmachines/{instanceId}/deallocate", pathParameters),
		autorest.WithQueryParameters(queryParameters))
	return preparer.Prepare((&http.Request{}).WithContext(ctx))
}

// DeallocateSender sends the Deallocate request. The method will close the
// http.Response Body if it receives an error.
func (client VirtualMachineScaleSetVMsClient) DeallocateSender(req *http.Request) (future VirtualMachineScaleSetVMsDeallocateFuture, err error) {
	var resp *http.Response
	resp, err = client.Send(req, azure.DoRetryWithRegistration(client.Client))
	if err != nil {
		return
	}
	future.Future, err = azure.NewFutureFromResponse(resp)
	return
}

// DeallocateResponder handles the response to the Deallocate request. The method always
// closes the http.Response Body.
func (client VirtualMachineScaleSetVMsClient) DeallocateResponder(resp *http.Response) (result OperationStatusResponse, err error) {
	err = autorest.Respond(
		resp,
		client.ByInspecting(),
		azure.WithErrorUnlessStatusCode(http.StatusOK, http.StatusAccepted),
		autorest.ByUnmarshallingJSON(&result),
		autorest.ByClosing())
	result.Response = autorest.Response{Response: resp}
	return
}

// Delete deletes a virtual machine from a VM scale set.
// Parameters:
// resourceGroupName - the name of the resource group.
// VMScaleSetName - the name of the VM scale set.
// instanceID - the instance ID of the virtual machine.
func (client VirtualMachineScaleSetVMsClient) Delete(ctx context.Context, resourceGroupName string, VMScaleSetName string, instanceID string) (result VirtualMachineScaleSetVMsDeleteFuture, err error) {
	if tracing.IsEnabled() {
		ctx = tracing.StartSpan(ctx, fqdn+"/VirtualMachineScaleSetVMsClient.Delete")
		defer func() {
			sc := -1
			if result.Response() != nil {
				sc = result.Response().StatusCode
			}
			tracing.EndSpan(ctx, sc, err)
		}()
	}
	req, err := client.DeletePreparer(ctx, resourceGroupName, VMScaleSetName, instanceID)
	if err != nil {
		err = autorest.NewErrorWithError(err, "compute.VirtualMachineScaleSetVMsClient", "Delete", nil, "Failure preparing request")
		return
	}

	result, err = client.DeleteSender(req)
	if err != nil {
		err = autorest.NewErrorWithError(err, "compute.VirtualMachineScaleSetVMsClient", "Delete", result.Response(), "Failure sending request")
		return
	}

	return
}

// DeletePreparer prepares the Delete request.
func (client VirtualMachineScaleSetVMsClient) DeletePreparer(ctx context.Context, resourceGroupName string, VMScaleSetName string, instanceID string) (*http.Request, error) {
	pathParameters := map[string]interface{}{
		"instanceId":        autorest.Encode("path", instanceID),
		"resourceGroupName": autorest.Encode("path", resourceGroupName),
		"subscriptionId":    autorest.Encode("path", client.SubscriptionID),
		"vmScaleSetName":    autorest.Encode("path", VMScaleSetName),
	}

	const APIVersion = "2017-12-01"
	queryParameters := map[string]interface{}{
		"api-version": APIVersion,
	}

	preparer := autorest.CreatePreparer(
		autorest.AsDelete(),
		autorest.WithBaseURL(client.BaseURI),
		autorest.WithPathParameters("/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.Compute/virtualMachineScaleSets/{vmScaleSetName}/virtualmachines/{instanceId}", pathParameters),
		autorest.WithQueryParameters(queryParameters))
	return preparer.Prepare((&http.Request{}).WithContext(ctx))
}

// DeleteSender sends the Delete request. The method will close the
// http.Response Body if it receives an error.
func (client VirtualMachineScaleSetVMsClient) DeleteSender(req *http.Request) (future VirtualMachineScaleSetVMsDeleteFuture, err error) {
	var resp *http.Response
	resp, err = client.Send(req, azure.DoRetryWithRegistration(client.Client))
	if err != nil {
		return
	}
	future.Future, err = azure.NewFutureFromResponse(resp)
	return
}

// DeleteResponder handles the response to the Delete request. The method always
// closes the http.Response Body.
func (client VirtualMachineScaleSetVMsClient) DeleteResponder(resp *http.Response) (result OperationStatusResponse, err error) {
	err = autorest.Respond(
		resp,
		client.ByInspecting(),
		azure.WithErrorUnlessStatusCode(http.StatusOK, http.StatusAccepted, http.StatusNoContent),
		autorest.ByUnmarshallingJSON(&result),
		autorest.ByClosing())
	result.Response = autorest.Response{Response: resp}
	return
}

// Get gets a virtual machine from a VM scale set.
// Parameters:
// resourceGroupName - the name of the resource group.
// VMScaleSetName - the name of the VM scale set.
// instanceID - the instance ID of the virtual machine.
func (client VirtualMachineScaleSetVMsClient) Get(ctx context.Context, resourceGroupName string, VMScaleSetName string, instanceID string) (result VirtualMachineScaleSetVM, err error) {
	if tracing.IsEnabled() {
		ctx = tracing.StartSpan(ctx, fqdn+"/VirtualMachineScaleSetVMsClient.Get")
		defer func() {
			sc := -1
			if result.Response.Response != nil {
				sc = result.Response.Response.StatusCode
			}
			tracing.EndSpan(ctx, sc, err)
		}()
	}
	req, err := client.GetPreparer(ctx, resourceGroupName, VMScaleSetName, instanceID)
	if err != nil {
		err = autorest.NewErrorWithError(err, "compute.VirtualMachineScaleSetVMsClient", "Get", nil, "Failure preparing request")
		return
	}

	resp, err := client.GetSender(req)
	if err != nil {
		result.Response = autorest.Response{Response: resp}
		err = autorest.NewErrorWithError(err, "compute.VirtualMachineScaleSetVMsClient", "Get", resp, "Failure sending request")
		return
	}

	result, err = client.GetResponder(resp)
	if err != nil {
		err = autorest.NewErrorWithError(err, "compute.VirtualMachineScaleSetVMsClient", "Get", resp, "Failure responding to request")
	}

	return
}

// GetPreparer prepares the Get request.
func (client VirtualMachineScaleSetVMsClient) GetPreparer(ctx context.Context, resourceGroupName string, VMScaleSetName string, instanceID string) (*http.Request, error) {
	pathParameters := map[string]interface{}{
		"instanceId":        autorest.Encode("path", instanceID),
		"resourceGroupName": autorest.Encode("path", resourceGroupName),
		"subscriptionId":    autorest.Encode("path", client.SubscriptionID),
		"vmScaleSetName":    autorest.Encode("path", VMScaleSetName),
	}

	const APIVersion = "2017-12-01"
	queryParameters := map[string]interface{}{
		"api-version": APIVersion,
	}

	preparer := autorest.CreatePreparer(
		autorest.AsGet(),
		autorest.WithBaseURL(client.BaseURI),
		autorest.WithPathParameters("/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.Compute/virtualMachineScaleSets/{vmScaleSetName}/virtualmachines/{instanceId}", pathParameters),
		autorest.WithQueryParameters(queryParameters))
	return preparer.Prepare((&http.Request{}).WithContext(ctx))
}

// GetSender sends the Get request. The method will close the
// http.Response Body if it receives an error.
func (client VirtualMachineScaleSetVMsClient) GetSender(req *http.Request) (*http.Response, error) {
	return client.Send(req, azure.DoRetryWithRegistration(client.Client))
}

// GetResponder handles the response to the Get request. The method always
// closes the http.Response Body.
func (client VirtualMachineScaleSetVMsClient) GetResponder(resp *http.Response) (result VirtualMachineScaleSetVM, err error) {
	err = autorest.Respond(
		resp,
		client.ByInspecting(),
		azure.WithErrorUnlessStatusCode(http.StatusOK),
		autorest.ByUnmarshallingJSON(&result),
		autorest.ByClosing())
	result.Response = autorest.Response{Response: resp}
	return
}

// GetInstanceView gets the status of a virtual machine from a VM scale set.
// Parameters:
// resourceGroupName - the name of the resource group.
// VMScaleSetName - the name of the VM scale set.
// instanceID - the instance ID of the virtual machine.
func (client VirtualMachineScaleSetVMsClient) GetInstanceView(ctx context.Context, resourceGroupName string, VMScaleSetName string, instanceID string) (result VirtualMachineScaleSetVMInstanceView, err error) {
	if tracing.IsEnabled() {
		ctx = tracing.StartSpan(ctx, fqdn+"/VirtualMachineScaleSetVMsClient.GetInstanceView")
		defer func() {
			sc := -1
			if result.Response.Response != nil {
				sc = result.Response.Response.StatusCode
			}
			tracing.EndSpan(ctx, sc, err)
		}()
	}
	req, err := client.GetInstanceViewPreparer(ctx, resourceGroupName, VMScaleSetName, instanceID)
	if err != nil {
		err = autorest.NewErrorWithError(err, "compute.VirtualMachineScaleSetVMsClient", "GetInstanceView", nil, "Failure preparing request")
		return
	}

	resp, err := client.GetInstanceViewSender(req)
	if err != nil {
		result.Response = autorest.Response{Response: resp}
		err = autorest.NewErrorWithError(err, "compute.VirtualMachineScaleSetVMsClient", "GetInstanceView", resp, "Failure sending request")
		return
	}

	result, err = client.GetInstanceViewResponder(resp)
	if err != nil {
		err = autorest.NewErrorWithError(err, "compute.VirtualMachineScaleSetVMsClient", "GetInstanceView", resp, "Failure responding to request")
	}

	return
}

// GetInstanceViewPreparer prepares the GetInstanceView request.
func (client VirtualMachineScaleSetVMsClient) GetInstanceViewPreparer(ctx context.Context, resourceGroupName string, VMScaleSetName string, instanceID string) (*http.Request, error) {
	pathParameters := map[string]interface{}{
		"instanceId":        autorest.Encode("path", instanceID),
		"resourceGroupName": autorest.Encode("path", resourceGroupName),
		"subscriptionId":    autorest.Encode("path", client.SubscriptionID),
		"vmScaleSetName":    autorest.Encode("path", VMScaleSetName),
	}

	const APIVersion = "2017-12-01"
	queryParameters := map[string]interface{}{
		"api-version": APIVersion,
	}

	preparer := autorest.CreatePreparer(
		autorest.AsGet(),
		autorest.WithBaseURL(client.BaseURI),
		autorest.WithPathParameters("/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.Compute/virtualMachineScaleSets/{vmScaleSetName}/virtualmachines/{instanceId}/instanceView", pathParameters),
		autorest.WithQueryParameters(queryParameters))
	return preparer.Prepare((&http.Request{}).WithContext(ctx))
}

// GetInstanceViewSender sends the GetInstanceView request. The method will close the
// http.Response Body if it receives an error.
func (client VirtualMachineScaleSetVMsClient) GetInstanceViewSender(req *http.Request) (*http.Response, error) {
	return client.Send(req, azure.DoRetryWithRegistration(client.Client))
}

// GetInstanceViewResponder handles the response to the GetInstanceView request. The method always
// closes the http.Response Body.
func (client VirtualMachineScaleSetVMsClient) GetInstanceViewResponder(resp *http.Response) (result VirtualMachineScaleSetVMInstanceView, err error) {
	err = autorest.Respond(
		resp,
		client.ByInspecting(),
		azure.WithErrorUnlessStatusCode(http.StatusOK),
		autorest.ByUnmarshallingJSON(&result),
		autorest.ByClosing())
	result.Response = autorest.Response{Response: resp}
	return
}

// List gets a list of all virtual machines in a VM scale sets.
// Parameters:
// resourceGroupName - the name of the resource group.
// virtualMachineScaleSetName - the name of the VM scale set.
// filter - the filter to apply to the operation.
// selectParameter - the list parameters.
// expand - the expand expression to apply to the operation.
func (client VirtualMachineScaleSetVMsClient) List(ctx context.Context, resourceGroupName string, virtualMachineScaleSetName string, filter string, selectParameter string, expand string) (result VirtualMachineScaleSetVMListResultPage, err error) {
	if tracing.IsEnabled() {
		ctx = tracing.StartSpan(ctx, fqdn+"/VirtualMachineScaleSetVMsClient.List")
		defer func() {
			sc := -1
			if result.vmssvlr.Response.Response != nil {
				sc = result.vmssvlr.Response.Response.StatusCode
			}
			tracing.EndSpan(ctx, sc, err)
		}()
	}
	result.fn = client.listNextResults
	req, err := client.ListPreparer(ctx, resourceGroupName, virtualMachineScaleSetName, filter, selectParameter, expand)
	if err != nil {
		err = autorest.NewErrorWithError(err, "compute.VirtualMachineScaleSetVMsClient", "List", nil, "Failure preparing request")
		return
	}

	resp, err := client.ListSender(req)
	if err != nil {
		result.vmssvlr.Response = autorest.Response{Response: resp}
		err = autorest.NewErrorWithError(err, "compute.VirtualMachineScaleSetVMsClient", "List", resp, "Failure sending request")
		return
	}

	result.vmssvlr, err = client.ListResponder(resp)
	if err != nil {
		err = autorest.NewErrorWithError(err, "compute.VirtualMachineScaleSetVMsClient", "List", resp, "Failure responding to request")
	}

	return
}

// ListPreparer prepares the List request.
func (client VirtualMachineScaleSetVMsClient) ListPreparer(ctx context.Context, resourceGroupName string, virtualMachineScaleSetName string, filter string, selectParameter string, expand string) (*http.Request, error) {
	pathParameters := map[string]interface{}{
		"resourceGroupName":          autorest.Encode("path", resourceGroupName),
		"subscriptionId":             autorest.Encode("path", client.SubscriptionID),
		"virtualMachineScaleSetName": autorest.Encode("path", virtualMachineScaleSetName),
	}

	const APIVersion = "2017-12-01"
	queryParameters := map[string]interface{}{
		"api-version": APIVersion,
	}
	if len(filter) > 0 {
		queryParameters["$filter"] = autorest.Encode("query", filter)
	}
	if len(selectParameter) > 0 {
		queryParameters["$select"] = autorest.Encode("query", selectParameter)
	}
	if len(expand) > 0 {
		queryParameters["$expand"] = autorest.Encode("query", expand)
	}

	preparer := autorest.CreatePreparer(
		autorest.AsGet(),
		autorest.WithBaseURL(client.BaseURI),
		autorest.WithPathParameters("/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.Compute/virtualMachineScaleSets/{virtualMachineScaleSetName}/virtualMachines", pathParameters),
		autorest.WithQueryParameters(queryParameters))
	return preparer.Prepare((&http.Request{}).WithContext(ctx))
}

// ListSender sends the List request. The method will close the
// http.Response Body if it receives an error.
func (client VirtualMachineScaleSetVMsClient) ListSender(req *http.Request) (*http.Response, error) {
	return client.Send(req, azure.DoRetryWithRegistration(client.Client))
}

// ListResponder handles the response to the List request. The method always
// closes the http.Response Body.
func (client VirtualMachineScaleSetVMsClient) ListResponder(resp *http.Response) (result VirtualMachineScaleSetVMListResult, err error) {
	err = autorest.Respond(
		resp,
		client.ByInspecting(),
		azure.WithErrorUnlessStatusCode(http.StatusOK),
		autorest.ByUnmarshallingJSON(&result),
		autorest.ByClosing())
	result.Response = autorest.Response{Response: resp}
	return
}

// listNextResults retrieves the next set of results, if any.
func (client VirtualMachineScaleSetVMsClient) listNextResults(ctx context.Context, lastResults VirtualMachineScaleSetVMListResult) (result VirtualMachineScaleSetVMListResult, err error) {
	req, err := lastResults.virtualMachineScaleSetVMListResultPreparer(ctx)
	if err != nil {
		return result, autorest.NewErrorWithError(err, "compute.VirtualMachineScaleSetVMsClient", "listNextResults", nil, "Failure preparing next results request")
	}
	if req == nil {
		return
	}
	resp, err := client.ListSender(req)
	if err != nil {
		result.Response = autorest.Response{Response: resp}
		return result, autorest.NewErrorWithError(err, "compute.VirtualMachineScaleSetVMsClient", "listNextResults", resp, "Failure sending next results request")
	}
	result, err = client.ListResponder(resp)
	if err != nil {
		err = autorest.NewErrorWithError(err, "compute.VirtualMachineScaleSetVMsClient", "listNextResults", resp, "Failure responding to next results request")
	}
	return
}

// ListComplete enumerates all values, automatically crossing page boundaries as required.
func (client VirtualMachineScaleSetVMsClient) ListComplete(ctx context.Context, resourceGroupName string, virtualMachineScaleSetName string, filter string, selectParameter string, expand string) (result VirtualMachineScaleSetVMListResultIterator, err error) {
	if tracing.IsEnabled() {
		ctx = tracing.StartSpan(ctx, fqdn+"/VirtualMachineScaleSetVMsClient.List")
		defer func() {
			sc := -1
			if result.Response().Response.Response != nil {
				sc = result.page.Response().Response.Response.StatusCode
			}
			tracing.EndSpan(ctx, sc, err)
		}()
	}
	result.page, err = client.List(ctx, resourceGroupName, virtualMachineScaleSetName, filter, selectParameter, expand)
	return
}

// PerformMaintenance performs maintenance on a virtual machine in a VM scale set.
// Parameters:
// resourceGroupName - the name of the resource group.
// VMScaleSetName - the name of the VM scale set.
// instanceID - the instance ID of the virtual machine.
func (client VirtualMachineScaleSetVMsClient) PerformMaintenance(ctx context.Context, resourceGroupName string, VMScaleSetName string, instanceID string) (result VirtualMachineScaleSetVMsPerformMaintenanceFuture, err error) {
	if tracing.IsEnabled() {
		ctx = tracing.StartSpan(ctx, fqdn+"/VirtualMachineScaleSetVMsClient.PerformMaintenance")
		defer func() {
			sc := -1
			if result.Response() != nil {
				sc = result.Response().StatusCode
			}
			tracing.EndSpan(ctx, sc, err)
		}()
	}
	req, err := client.PerformMaintenancePreparer(ctx, resourceGroupName, VMScaleSetName, instanceID)
	if err != nil {
		err = autorest.NewErrorWithError(err, "compute.VirtualMachineScaleSetVMsClient", "PerformMaintenance", nil, "Failure preparing request")
		return
	}

	result, err = client.PerformMaintenanceSender(req)
	if err != nil {
		err = autorest.NewErrorWithError(err, "compute.VirtualMachineScaleSetVMsClient", "PerformMaintenance", result.Response(), "Failure sending request")
		return
	}

	return
}

// PerformMaintenancePreparer prepares the PerformMaintenance request.
func (client VirtualMachineScaleSetVMsClient) PerformMaintenancePreparer(ctx context.Context, resourceGroupName string, VMScaleSetName string, instanceID string) (*http.Request, error) {
	pathParameters := map[string]interface{}{
		"instanceId":        autorest.Encode("path", instanceID),
		"resourceGroupName": autorest.Encode("path", resourceGroupName),
		"subscriptionId":    autorest.Encode("path", client.SubscriptionID),
		"vmScaleSetName":    autorest.Encode("path", VMScaleSetName),
	}

	const APIVersion = "2017-12-01"
	queryParameters := map[string]interface{}{
		"api-version": APIVersion,
	}

	preparer := autorest.CreatePreparer(
		autorest.AsPost(),
		autorest.WithBaseURL(client.BaseURI),
		autorest.WithPathParameters("/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.Compute/virtualMachineScaleSets/{vmScaleSetName}/virtualmachines/{instanceId}/performMaintenance", pathParameters),
		autorest.WithQueryParameters(queryParameters))
	return preparer.Prepare((&http.Request{}).WithContext(ctx))
}

// PerformMaintenanceSender sends the PerformMaintenance request. The method will close the
// http.Response Body if it receives an error.
func (client VirtualMachineScaleSetVMsClient) PerformMaintenanceSender(req *http.Request) (future VirtualMachineScaleSetVMsPerformMaintenanceFuture, err error) {
	var resp *http.Response
	resp, err = client.Send(req, azure.DoRetryWithRegistration(client.Client))
	if err != nil {
		return
	}
	future.Future, err = azure.NewFutureFromResponse(resp)
	return
}

// PerformMaintenanceResponder handles the response to the PerformMaintenance request. The method always
// closes the http.Response Body.
func (client VirtualMachineScaleSetVMsClient) PerformMaintenanceResponder(resp *http.Response) (result OperationStatusResponse, err error) {
	err = autorest.Respond(
		resp,
		client.ByInspecting(),
		azure.WithErrorUnlessStatusCode(http.StatusOK, http.StatusAccepted),
		autorest.ByUnmarshallingJSON(&result),
		autorest.ByClosing())
	result.Response = autorest.Response{Response: resp}
	return
}

// PowerOff power off (stop) a virtual machine in a VM scale set. Note that resources are still attached and you are
// getting charged for the resources. Instead, use deallocate to release resources and avoid charges.
// Parameters:
// resourceGroupName - the name of the resource group.
// VMScaleSetName - the name of the VM scale set.
// instanceID - the instance ID of the virtual machine.
func (client VirtualMachineScaleSetVMsClient) PowerOff(ctx context.Context, resourceGroupName string, VMScaleSetName string, instanceID string) (result VirtualMachineScaleSetVMsPowerOffFuture, err error) {
	if tracing.IsEnabled() {
		ctx = tracing.StartSpan(ctx, fqdn+"/VirtualMachineScaleSetVMsClient.PowerOff")
		defer func() {
			sc := -1
			if result.Response() != nil {
				sc = result.Response().StatusCode
			}
			tracing.EndSpan(ctx, sc, err)
		}()
	}
	req, err := client.PowerOffPreparer(ctx, resourceGroupName, VMScaleSetName, instanceID)
	if err != nil {
		err = autorest.NewErrorWithError(err, "compute.VirtualMachineScaleSetVMsClient", "PowerOff", nil, "Failure preparing request")
		return
	}

	result, err = client.PowerOffSender(req)
	if err != nil {
		err = autorest.NewErrorWithError(err, "compute.VirtualMachineScaleSetVMsClient", "PowerOff", result.Response(), "Failure sending request")
		return
	}

	return
}

// PowerOffPreparer prepares the PowerOff request.
func (client VirtualMachineScaleSetVMsClient) PowerOffPreparer(ctx context.Context, resourceGroupName string, VMScaleSetName string, instanceID string) (*http.Request, error) {
	pathParameters := map[string]interface{}{
		"instanceId":        autorest.Encode("path", instanceID),
		"resourceGroupName": autorest.Encode("path", resourceGroupName),
		"subscriptionId":    autorest.Encode("path", client.SubscriptionID),
		"vmScaleSetName":    autorest.Encode("path", VMScaleSetName),
	}

	const APIVersion = "2017-12-01"
	queryParameters := map[string]interface{}{
		"api-version": APIVersion,
	}

	preparer := autorest.CreatePreparer(
		autorest.AsPost(),
		autorest.WithBaseURL(client.BaseURI),
		autorest.WithPathParameters("/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.Compute/virtualMachineScaleSets/{vmScaleSetName}/virtualmachines/{instanceId}/poweroff", pathParameters),
		autorest.WithQueryParameters(queryParameters))
	return preparer.Prepare((&http.Request{}).WithContext(ctx))
}

// PowerOffSender sends the PowerOff request. The method will close the
// http.Response Body if it receives an error.
func (client VirtualMachineScaleSetVMsClient) PowerOffSender(req *http.Request) (future VirtualMachineScaleSetVMsPowerOffFuture, err error) {
	var resp *http.Response
	resp, err = client.Send(req, azure.DoRetryWithRegistration(client.Client))
	if err != nil {
		return
	}
	future.Future, err = azure.NewFutureFromResponse(resp)
	return
}

// PowerOffResponder handles the response to the PowerOff request. The method always
// closes the http.Response Body.
func (client VirtualMachineScaleSetVMsClient) PowerOffResponder(resp *http.Response) (result OperationStatusResponse, err error) {
	err = autorest.Respond(
		resp,
		client.ByInspecting(),
		azure.WithErrorUnlessStatusCode(http.StatusOK, http.StatusAccepted),
		autorest.ByUnmarshallingJSON(&result),
		autorest.ByClosing())
	result.Response = autorest.Response{Response: resp}
	return
}

// Redeploy shuts down the virtual machine in the virtual machine scale set, moves it to a new node, and powers it back
// on.
// Parameters:
// resourceGroupName - the name of the resource group.
// VMScaleSetName - the name of the VM scale set.
// instanceID - the instance ID of the virtual machine.
func (client VirtualMachineScaleSetVMsClient) Redeploy(ctx context.Context, resourceGroupName string, VMScaleSetName string, instanceID string) (result VirtualMachineScaleSetVMsRedeployFuture, err error) {
	if tracing.IsEnabled() {
		ctx = tracing.StartSpan(ctx, fqdn+"/VirtualMachineScaleSetVMsClient.Redeploy")
		defer func() {
			sc := -1
			if result.Response() != nil {
				sc = result.Response().StatusCode
			}
			tracing.EndSpan(ctx, sc, err)
		}()
	}
	req, err := client.RedeployPreparer(ctx, resourceGroupName, VMScaleSetName, instanceID)
	if err != nil {
		err = autorest.NewErrorWithError(err, "compute.VirtualMachineScaleSetVMsClient", "Redeploy", nil, "Failure preparing request")
		return
	}

	result, err = client.RedeploySender(req)
	if err != nil {
		err = autorest.NewErrorWithError(err, "compute.VirtualMachineScaleSetVMsClient", "Redeploy", result.Response(), "Failure sending request")
		return
	}

	return
}

// RedeployPreparer prepares the Redeploy request.
func (client VirtualMachineScaleSetVMsClient) RedeployPreparer(ctx context.Context, resourceGroupName string, VMScaleSetName string, instanceID string) (*http.Request, error) {
	pathParameters := map[string]interface{}{
		"instanceId":        autorest.Encode("path", instanceID),
		"resourceGroupName": autorest.Encode("path", resourceGroupName),
		"subscriptionId":    autorest.Encode("path", client.SubscriptionID),
		"vmScaleSetName":    autorest.Encode("path", VMScaleSetName),
	}

	const APIVersion = "2017-12-01"
	queryParameters := map[string]interface{}{
		"api-version": APIVersion,
	}

	preparer := autorest.CreatePreparer(
		autorest.AsPost(),
		autorest.WithBaseURL(client.BaseURI),
		autorest.WithPathParameters("/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.Compute/virtualMachineScaleSets/{vmScaleSetName}/virtualmachines/{instanceId}/redeploy", pathParameters),
		autorest.WithQueryParameters(queryParameters))
	return preparer.Prepare((&http.Request{}).WithContext(ctx))
}

// RedeploySender sends the Redeploy request. The method will close the
// http.Response Body if it receives an error.
func (client VirtualMachineScaleSetVMsClient) RedeploySender(req *http.Request) (future VirtualMachineScaleSetVMsRedeployFuture, err error) {
	var resp *http.Response
	resp, err = client.Send(req, azure.DoRetryWithRegistration(client.Client))
	if err != nil {
		return
	}
	future.Future, err = azure.NewFutureFromResponse(resp)
	return
}

// RedeployResponder handles the response to the Redeploy request. The method always
// closes the http.Response Body.
func (client VirtualMachineScaleSetVMsClient) RedeployResponder(resp *http.Response) (result OperationStatusResponse, err error) {
	err = autorest.Respond(
		resp,
		client.ByInspecting(),
		azure.WithErrorUnlessStatusCode(http.StatusOK, http.StatusAccepted),
		autorest.ByUnmarshallingJSON(&result),
		autorest.ByClosing())
	result.Response = autorest.Response{Response: resp}
	return
}

// Reimage reimages (upgrade the operating system) a specific virtual machine in a VM scale set.
// Parameters:
// resourceGroupName - the name of the resource group.
// VMScaleSetName - the name of the VM scale set.
// instanceID - the instance ID of the virtual machine.
func (client VirtualMachineScaleSetVMsClient) Reimage(ctx context.Context, resourceGroupName string, VMScaleSetName string, instanceID string) (result VirtualMachineScaleSetVMsReimageFuture, err error) {
	if tracing.IsEnabled() {
		ctx = tracing.StartSpan(ctx, fqdn+"/VirtualMachineScaleSetVMsClient.Reimage")
		defer func() {
			sc := -1
			if result.Response() != nil {
				sc = result.Response().StatusCode
			}
			tracing.EndSpan(ctx, sc, err)
		}()
	}
	req, err := client.ReimagePreparer(ctx, resourceGroupName, VMScaleSetName, instanceID)
	if err != nil {
		err = autorest.NewErrorWithError(err, "compute.VirtualMachineScaleSetVMsClient", "Reimage", nil, "Failure preparing request")
		return
	}

	result, err = client.ReimageSender(req)
	if err != nil {
		err = autorest.NewErrorWithError(err, "compute.VirtualMachineScaleSetVMsClient", "Reimage", result.Response(), "Failure sending request")
		return
	}

	return
}

// ReimagePreparer prepares the Reimage request.
func (client VirtualMachineScaleSetVMsClient) ReimagePreparer(ctx context.Context, resourceGroupName string, VMScaleSetName string, instanceID string) (*http.Request, error) {
	pathParameters := map[string]interface{}{
		"instanceId":        autorest.Encode("path", instanceID),
		"resourceGroupName": autorest.Encode("path", resourceGroupName),
		"subscriptionId":    autorest.Encode("path", client.SubscriptionID),
		"vmScaleSetName":    autorest.Encode("path", VMScaleSetName),
	}

	const APIVersion = "2017-12-01"
	queryParameters := map[string]interface{}{
		"api-version": APIVersion,
	}

	preparer := autorest.CreatePreparer(
		autorest.AsPost(),
		autorest.WithBaseURL(client.BaseURI),
		autorest.WithPathParameters("/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.Compute/virtualMachineScaleSets/{vmScaleSetName}/virtualmachines/{instanceId}/reimage", pathParameters),
		autorest.WithQueryParameters(queryParameters))
	return preparer.Prepare((&http.Request{}).WithContext(ctx))
}

// ReimageSender sends the Reimage request. The method will close the
// http.Response Body if it receives an error.
func (client VirtualMachineScaleSetVMsClient) ReimageSender(req *http.Request) (future VirtualMachineScaleSetVMsReimageFuture, err error) {
	var resp *http.Response
	resp, err = client.Send(req, azure.DoRetryWithRegistration(client.Client))
	if err != nil {
		return
	}
	future.Future, err = azure.NewFutureFromResponse(resp)
	return
}

// ReimageResponder handles the response to the Reimage request. The method always
// closes the http.Response Body.
func (client VirtualMachineScaleSetVMsClient) ReimageResponder(resp *http.Response) (result OperationStatusResponse, err error) {
	err = autorest.Respond(
		resp,
		client.ByInspecting(),
		azure.WithErrorUnlessStatusCode(http.StatusOK, http.StatusAccepted),
		autorest.ByUnmarshallingJSON(&result),
		autorest.ByClosing())
	result.Response = autorest.Response{Response: resp}
	return
}

// ReimageAll allows you to re-image all the disks ( including data disks ) in the a VM scale set instance. This
// operation is only supported for managed disks.
// Parameters:
// resourceGroupName - the name of the resource group.
// VMScaleSetName - the name of the VM scale set.
// instanceID - the instance ID of the virtual machine.
func (client VirtualMachineScaleSetVMsClient) ReimageAll(ctx context.Context, resourceGroupName string, VMScaleSetName string, instanceID string) (result VirtualMachineScaleSetVMsReimageAllFuture, err error) {
	if tracing.IsEnabled() {
		ctx = tracing.StartSpan(ctx, fqdn+"/VirtualMachineScaleSetVMsClient.ReimageAll")
		defer func() {
			sc := -1
			if result.Response() != nil {
				sc = result.Response().StatusCode
			}
			tracing.EndSpan(ctx, sc, err)
		}()
	}
	req, err := client.ReimageAllPreparer(ctx, resourceGroupName, VMScaleSetName, instanceID)
	if err != nil {
		err = autorest.NewErrorWithError(err, "compute.VirtualMachineScaleSetVMsClient", "ReimageAll", nil, "Failure preparing request")
		return
	}

	result, err = client.ReimageAllSender(req)
	if err != nil {
		err = autorest.NewErrorWithError(err, "compute.VirtualMachineScaleSetVMsClient", "ReimageAll", result.Response(), "Failure sending request")
		return
	}

	return
}

// ReimageAllPreparer prepares the ReimageAll request.
func (client VirtualMachineScaleSetVMsClient) ReimageAllPreparer(ctx context.Context, resourceGroupName string, VMScaleSetName string, instanceID string) (*http.Request, error) {
	pathParameters := map[string]interface{}{
		"instanceId":        autorest.Encode("path", instanceID),
		"resourceGroupName": autorest.Encode("path", resourceGroupName),
		"subscriptionId":    autorest.Encode("path", client.SubscriptionID),
		"vmScaleSetName":    autorest.Encode("path", VMScaleSetName),
	}

	const APIVersion = "2017-12-01"
	queryParameters := map[string]interface{}{
		"api-version": APIVersion,
	}

	preparer := autorest.CreatePreparer(
		autorest.AsPost(),
		autorest.WithBaseURL(client.BaseURI),
		autorest.WithPathParameters("/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.Compute/virtualMachineScaleSets/{vmScaleSetName}/virtualmachines/{instanceId}/reimageall", pathParameters),
		autorest.WithQueryParameters(queryParameters))
	return preparer.Prepare((&http.Request{}).WithContext(ctx))
}

// ReimageAllSender sends the ReimageAll request. The method will close the
// http.Response Body if it receives an error.
func (client VirtualMachineScaleSetVMsClient) ReimageAllSender(req *http.Request) (future VirtualMachineScaleSetVMsReimageAllFuture, err error) {
	var resp *http.Response
	resp, err = client.Send(req, azure.DoRetryWithRegistration(client.Client))
	if err != nil {
		return
	}
	future.Future, err = azure.NewFutureFromResponse(resp)
	return
}

// ReimageAllResponder handles the response to the ReimageAll request. The method always
// closes the http.Response Body.
func (client VirtualMachineScaleSetVMsClient) ReimageAllResponder(resp *http.Response) (result OperationStatusResponse, err error) {
	err = autorest.Respond(
		resp,
		client.ByInspecting(),
		azure.WithErrorUnlessStatusCode(http.StatusOK, http.StatusAccepted),
		autorest.ByUnmarshallingJSON(&result),
		autorest.ByClosing())
	result.Response = autorest.Response{Response: resp}
	return
}

// Restart restarts a virtual machine in a VM scale set.
// Parameters:
// resourceGroupName - the name of the resource group.
// VMScaleSetName - the name of the VM scale set.
// instanceID - the instance ID of the virtual machine.
func (client VirtualMachineScaleSetVMsClient) Restart(ctx context.Context, resourceGroupName string, VMScaleSetName string, instanceID string) (result VirtualMachineScaleSetVMsRestartFuture, err error) {
	if tracing.IsEnabled() {
		ctx = tracing.StartSpan(ctx, fqdn+"/VirtualMachineScaleSetVMsClient.Restart")
		defer func() {
			sc := -1
			if result.Response() != nil {
				sc = result.Response().StatusCode
			}
			tracing.EndSpan(ctx, sc, err)
		}()
	}
	req, err := client.RestartPreparer(ctx, resourceGroupName, VMScaleSetName, instanceID)
	if err != nil {
		err = autorest.NewErrorWithError(err, "compute.VirtualMachineScaleSetVMsClient", "Restart", nil, "Failure preparing request")
		return
	}

	result, err = client.RestartSender(req)
	if err != nil {
		err = autorest.NewErrorWithError(err, "compute.VirtualMachineScaleSetVMsClient", "Restart", result.Response(), "Failure sending request")
		return
	}

	return
}

// RestartPreparer prepares the Restart request.
func (client VirtualMachineScaleSetVMsClient) RestartPreparer(ctx context.Context, resourceGroupName string, VMScaleSetName string, instanceID string) (*http.Request, error) {
	pathParameters := map[string]interface{}{
		"instanceId":        autorest.Encode("path", instanceID),
		"resourceGroupName": autorest.Encode("path", resourceGroupName),
		"subscriptionId":    autorest.Encode("path", client.SubscriptionID),
		"vmScaleSetName":    autorest.Encode("path", VMScaleSetName),
	}

	const APIVersion = "2017-12-01"
	queryParameters := map[string]interface{}{
		"api-version": APIVersion,
	}

	preparer := autorest.CreatePreparer(
		autorest.AsPost(),
		autorest.WithBaseURL(client.BaseURI),
		autorest.WithPathParameters("/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.Compute/virtualMachineScaleSets/{vmScaleSetName}/virtualmachines/{instanceId}/restart", pathParameters),
		autorest.WithQueryParameters(queryParameters))
	return preparer.Prepare((&http.Request{}).WithContext(ctx))
}

// RestartSender sends the Restart request. The method will close the
// http.Response Body if it receives an error.
func (client VirtualMachineScaleSetVMsClient) RestartSender(req *http.Request) (future VirtualMachineScaleSetVMsRestartFuture, err error) {
	var resp *http.Response
	resp, err = client.Send(req, azure.DoRetryWithRegistration(client.Client))
	if err != nil {
		return
	}
	future.Future, err = azure.NewFutureFromResponse(resp)
	return
}

// RestartResponder handles the response to the Restart request. The method always
// closes the http.Response Body.
func (client VirtualMachineScaleSetVMsClient) RestartResponder(resp *http.Response) (result OperationStatusResponse, err error) {
	err = autorest.Respond(
		resp,
		client.ByInspecting(),
		azure.WithErrorUnlessStatusCode(http.StatusOK, http.StatusAccepted),
		autorest.ByUnmarshallingJSON(&result),
		autorest.ByClosing())
	result.Response = autorest.Response{Response: resp}
	return
}

// Start starts a virtual machine in a VM scale set.
// Parameters:
// resourceGroupName - the name of the resource group.
// VMScaleSetName - the name of the VM scale set.
// instanceID - the instance ID of the virtual machine.
func (client VirtualMachineScaleSetVMsClient) Start(ctx context.Context, resourceGroupName string, VMScaleSetName string, instanceID string) (result VirtualMachineScaleSetVMsStartFuture, err error) {
	if tracing.IsEnabled() {
		ctx = tracing.StartSpan(ctx, fqdn+"/VirtualMachineScaleSetVMsClient.Start")
		defer func() {
			sc := -1
			if result.Response() != nil {
				sc = result.Response().StatusCode
			}
			tracing.EndSpan(ctx, sc, err)
		}()
	}
	req, err := client.StartPreparer(ctx, resourceGroupName, VMScaleSetName, instanceID)
	if err != nil {
		err = autorest.NewErrorWithError(err, "compute.VirtualMachineScaleSetVMsClient", "Start", nil, "Failure preparing request")
		return
	}

	result, err = client.StartSender(req)
	if err != nil {
		err = autorest.NewErrorWithError(err, "compute.VirtualMachineScaleSetVMsClient", "Start", result.Response(), "Failure sending request")
		return
	}

	return
}

// StartPreparer prepares the Start request.
func (client VirtualMachineScaleSetVMsClient) StartPreparer(ctx context.Context, resourceGroupName string, VMScaleSetName string, instanceID string) (*http.Request, error) {
	pathParameters := map[string]interface{}{
		"instanceId":        autorest.Encode("path", instanceID),
		"resourceGroupName": autorest.Encode("path", resourceGroupName),
		"subscriptionId":    autorest.Encode("path", client.SubscriptionID),
		"vmScaleSetName":    autorest.Encode("path", VMScaleSetName),
	}

	const APIVersion = "2017-12-01"
	queryParameters := map[string]interface{}{
		"api-version": APIVersion,
	}

	preparer := autorest.CreatePreparer(
		autorest.AsPost(),
		autorest.WithBaseURL(client.BaseURI),
		autorest.WithPathParameters("/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.Compute/virtualMachineScaleSets/{vmScaleSetName}/virtualmachines/{instanceId}/start", pathParameters),
		autorest.WithQueryParameters(queryParameters))
	return preparer.Prepare((&http.Request{}).WithContext(ctx))
}

// StartSender sends the Start request. The method will close the
// http.Response Body if it receives an error.
func (client VirtualMachineScaleSetVMsClient) StartSender(req *http.Request) (future VirtualMachineScaleSetVMsStartFuture, err error) {
	var resp *http.Response
	resp, err = client.Send(req, azure.DoRetryWithRegistration(client.Client))
	if err != nil {
		return
	}
	future.Future, err = azure.NewFutureFromResponse(resp)
	return
}

// StartResponder handles the response to the Start request. The method always
// closes the http.Response Body.
func (client VirtualMachineScaleSetVMsClient) StartResponder(resp *http.Response) (result OperationStatusResponse, err error) {
	err = autorest.Respond(
		resp,
		client.ByInspecting(),
		azure.WithErrorUnlessStatusCode(http.StatusOK, http.StatusAccepted),
		autorest.ByUnmarshallingJSON(&result),
		autorest.ByClosing())
	result.Response = autorest.Response{Response: resp}
	return
}

// Update updates a virtual machine of a VM scale set.
// Parameters:
// resourceGroupName - the name of the resource group.
// VMScaleSetName - the name of the VM scale set where the extension should be create or updated.
// instanceID - the instance ID of the virtual machine.
// parameters - parameters supplied to the Update Virtual Machine Scale Sets VM operation.
func (client VirtualMachineScaleSetVMsClient) Update(ctx context.Context, resourceGroupName string, VMScaleSetName string, instanceID string, parameters VirtualMachineScaleSetVM) (result VirtualMachineScaleSetVMsUpdateFuture, err error) {
	if tracing.IsEnabled() {
		ctx = tracing.StartSpan(ctx, fqdn+"/VirtualMachineScaleSetVMsClient.Update")
		defer func() {
			sc := -1
			if result.Response() != nil {
				sc = result.Response().StatusCode
			}
			tracing.EndSpan(ctx, sc, err)
		}()
	}
	if err := validation.Validate([]validation.Validation{
		{TargetValue: parameters,
			Constraints: []validation.Constraint{{Target: "parameters.VirtualMachineScaleSetVMProperties", Name: validation.Null, Rule: false,
				Chain: []validation.Constraint{{Target: "parameters.VirtualMachineScaleSetVMProperties.StorageProfile", Name: validation.Null, Rule: false,
					Chain: []validation.Constraint{{Target: "parameters.VirtualMachineScaleSetVMProperties.StorageProfile.OsDisk", Name: validation.Null, Rule: false,
						Chain: []validation.Constraint{{Target: "parameters.VirtualMachineScaleSetVMProperties.StorageProfile.OsDisk.EncryptionSettings", Name: validation.Null, Rule: false,
							Chain: []validation.Constraint{{Target: "parameters.VirtualMachineScaleSetVMProperties.StorageProfile.OsDisk.EncryptionSettings.DiskEncryptionKey", Name: validation.Null, Rule: false,
								Chain: []validation.Constraint{{Target: "parameters.VirtualMachineScaleSetVMProperties.StorageProfile.OsDisk.EncryptionSettings.DiskEncryptionKey.SecretURL", Name: validation.Null, Rule: true, Chain: nil},
									{Target: "parameters.VirtualMachineScaleSetVMProperties.StorageProfile.OsDisk.EncryptionSettings.DiskEncryptionKey.SourceVault", Name: validation.Null, Rule: true, Chain: nil},
								}},
								{Target: "parameters.VirtualMachineScaleSetVMProperties.StorageProfile.OsDisk.EncryptionSettings.KeyEncryptionKey", Name: validation.Null, Rule: false,
									Chain: []validation.Constraint{{Target: "parameters.VirtualMachineScaleSetVMProperties.StorageProfile.OsDisk.EncryptionSettings.KeyEncryptionKey.KeyURL", Name: validation.Null, Rule: true, Chain: nil},
										{Target: "parameters.VirtualMachineScaleSetVMProperties.StorageProfile.OsDisk.EncryptionSettings.KeyEncryptionKey.SourceVault", Name: validation.Null, Rule: true, Chain: nil},
									}},
							}},
						}},
					}},
				}}}}}); err != nil {
		return result, validation.NewError("compute.VirtualMachineScaleSetVMsClient", "Update", err.Error())
	}

	req, err := client.UpdatePreparer(ctx, resourceGroupName, VMScaleSetName, instanceID, parameters)
	if err != nil {
		err = autorest.NewErrorWithError(err, "compute.VirtualMachineScaleSetVMsClient", "Update", nil, "Failure preparing request")
		return
	}

	result, err = client.UpdateSender(req)
	if err != nil {
		err = autorest.NewErrorWithError(err, "compute.VirtualMachineScaleSetVMsClient", "Update", result.Response(), "Failure sending request")
		return
	}

	return
}

// UpdatePreparer prepares the Update request.
func (client VirtualMachineScaleSetVMsClient) UpdatePreparer(ctx context.Context, resourceGroupName string, VMScaleSetName string, instanceID string, parameters VirtualMachineScaleSetVM) (*http.Request, error) {
	pathParameters := map[string]interface{}{
		"instanceId":        autorest.Encode("path", instanceID),
		"resourceGroupName": autorest.Encode("path", resourceGroupName),
		"subscriptionId":    autorest.Encode("path", client.SubscriptionID),
		"vmScaleSetName":    autorest.Encode("path", VMScaleSetName),
	}

	const APIVersion = "2017-12-01"
	queryParameters := map[string]interface{}{
		"api-version": APIVersion,
	}

	parameters.InstanceID = nil
	parameters.Sku = nil
	parameters.Resources = nil
	preparer := autorest.CreatePreparer(
		autorest.AsContentType("application/json; charset=utf-8"),
		autorest.AsPut(),
		autorest.WithBaseURL(client.BaseURI),
		autorest.WithPathParameters("/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.Compute/virtualMachineScaleSets/{vmScaleSetName}/virtualmachines/{instanceId}", pathParameters),
		autorest.WithJSON(parameters),
		autorest.WithQueryParameters(queryParameters))
	return preparer.Prepare((&http.Request{}).WithContext(ctx))
}

// UpdateSender sends the Update request. The method will close the
// http.Response Body if it receives an error.
func (client VirtualMachineScaleSetVMsClient) UpdateSender(req *http.Request) (future VirtualMachineScaleSetVMsUpdateFuture, err error) {
	var resp *http.Response
	resp, err = client.Send(req, azure.DoRetryWithRegistration(client.Client))
	if err != nil {
		return
	}
	future.Future, err = azure.NewFutureFromResponse(resp)
	return
}

// UpdateResponder handles the response to the Update request. The method always
// closes the http.Response Body.
func (client VirtualMachineScaleSetVMsClient) UpdateResponder(resp *http.Response) (result VirtualMachineScaleSetVM, err error) {
	err = autorest.Respond(
		resp,
		client.ByInspecting(),
		azure.WithErrorUnlessStatusCode(http.StatusOK, http.StatusAccepted),
		autorest.ByUnmarshallingJSON(&result),
		autorest.ByClosing())
	result.Response = autorest.Response{Response: resp}
	return
}
