package compute

// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT License. See License.txt in the project root for license information.
//
// 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.FutureAPI != nil && result.FutureAPI.Response() != nil {
				sc = result.FutureAPI.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", nil, "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 = "2018-10-01"
	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
	}
	var azf azure.Future
	azf, err = azure.NewFutureFromResponse(resp)
	future.FutureAPI = &azf
	future.Result = future.result
	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 autorest.Response, err error) {
	err = autorest.Respond(
		resp,
		azure.WithErrorUnlessStatusCode(http.StatusOK, http.StatusAccepted),
		autorest.ByClosing())
	result.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.FutureAPI != nil && result.FutureAPI.Response() != nil {
				sc = result.FutureAPI.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", nil, "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 = "2018-10-01"
	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
	}
	var azf azure.Future
	azf, err = azure.NewFutureFromResponse(resp)
	future.FutureAPI = &azf
	future.Result = future.result
	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 autorest.Response, err error) {
	err = autorest.Respond(
		resp,
		azure.WithErrorUnlessStatusCode(http.StatusOK, http.StatusAccepted, http.StatusNoContent),
		autorest.ByClosing())
	result.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
	}

	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 = "2018-10-01"
	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,
		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
	}

	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 = "2018-10-01"
	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,
		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. Allowed values are 'startswith(instanceView/statuses/code,
// 'PowerState') eq true', 'properties/latestModelApplied eq true', 'properties/latestModelApplied eq false'.
// selectParameter - the list parameters. Allowed values are 'instanceView', 'instanceView/statuses'.
// expand - the expand expression to apply to the operation. Allowed values are 'instanceView'.
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
	}
	if result.vmssvlr.hasNextLink() && result.vmssvlr.IsEmpty() {
		err = result.NextWithContext(ctx)
		return
	}

	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 = "2018-10-01"
	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,
		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.FutureAPI != nil && result.FutureAPI.Response() != nil {
				sc = result.FutureAPI.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", nil, "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 = "2018-10-01"
	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
	}
	var azf azure.Future
	azf, err = azure.NewFutureFromResponse(resp)
	future.FutureAPI = &azf
	future.Result = future.result
	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 autorest.Response, err error) {
	err = autorest.Respond(
		resp,
		azure.WithErrorUnlessStatusCode(http.StatusOK, http.StatusAccepted),
		autorest.ByClosing())
	result.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.FutureAPI != nil && result.FutureAPI.Response() != nil {
				sc = result.FutureAPI.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", nil, "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 = "2018-10-01"
	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
	}
	var azf azure.Future
	azf, err = azure.NewFutureFromResponse(resp)
	future.FutureAPI = &azf
	future.Result = future.result
	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 autorest.Response, err error) {
	err = autorest.Respond(
		resp,
		azure.WithErrorUnlessStatusCode(http.StatusOK, http.StatusAccepted),
		autorest.ByClosing())
	result.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.FutureAPI != nil && result.FutureAPI.Response() != nil {
				sc = result.FutureAPI.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", nil, "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 = "2018-10-01"
	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
	}
	var azf azure.Future
	azf, err = azure.NewFutureFromResponse(resp)
	future.FutureAPI = &azf
	future.Result = future.result
	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 autorest.Response, err error) {
	err = autorest.Respond(
		resp,
		azure.WithErrorUnlessStatusCode(http.StatusOK, http.StatusAccepted),
		autorest.ByClosing())
	result.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.
// VMScaleSetVMReimageInput - parameters for the Reimaging Virtual machine in ScaleSet.
func (client VirtualMachineScaleSetVMsClient) Reimage(ctx context.Context, resourceGroupName string, VMScaleSetName string, instanceID string, VMScaleSetVMReimageInput *VirtualMachineScaleSetVMReimageParameters) (result VirtualMachineScaleSetVMsReimageFuture, err error) {
	if tracing.IsEnabled() {
		ctx = tracing.StartSpan(ctx, fqdn+"/VirtualMachineScaleSetVMsClient.Reimage")
		defer func() {
			sc := -1
			if result.FutureAPI != nil && result.FutureAPI.Response() != nil {
				sc = result.FutureAPI.Response().StatusCode
			}
			tracing.EndSpan(ctx, sc, err)
		}()
	}
	req, err := client.ReimagePreparer(ctx, resourceGroupName, VMScaleSetName, instanceID, VMScaleSetVMReimageInput)
	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", nil, "Failure sending request")
		return
	}

	return
}

// ReimagePreparer prepares the Reimage request.
func (client VirtualMachineScaleSetVMsClient) ReimagePreparer(ctx context.Context, resourceGroupName string, VMScaleSetName string, instanceID string, VMScaleSetVMReimageInput *VirtualMachineScaleSetVMReimageParameters) (*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 = "2018-10-01"
	queryParameters := map[string]interface{}{
		"api-version": APIVersion,
	}

	preparer := autorest.CreatePreparer(
		autorest.AsContentType("application/json; charset=utf-8"),
		autorest.AsPost(),
		autorest.WithBaseURL(client.BaseURI),
		autorest.WithPathParameters("/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.Compute/virtualMachineScaleSets/{vmScaleSetName}/virtualmachines/{instanceId}/reimage", pathParameters),
		autorest.WithQueryParameters(queryParameters))
	if VMScaleSetVMReimageInput != nil {
		preparer = autorest.DecoratePreparer(preparer,
			autorest.WithJSON(VMScaleSetVMReimageInput))
	}
	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
	}
	var azf azure.Future
	azf, err = azure.NewFutureFromResponse(resp)
	future.FutureAPI = &azf
	future.Result = future.result
	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 autorest.Response, err error) {
	err = autorest.Respond(
		resp,
		azure.WithErrorUnlessStatusCode(http.StatusOK, http.StatusAccepted),
		autorest.ByClosing())
	result.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.FutureAPI != nil && result.FutureAPI.Response() != nil {
				sc = result.FutureAPI.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", nil, "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 = "2018-10-01"
	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
	}
	var azf azure.Future
	azf, err = azure.NewFutureFromResponse(resp)
	future.FutureAPI = &azf
	future.Result = future.result
	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 autorest.Response, err error) {
	err = autorest.Respond(
		resp,
		azure.WithErrorUnlessStatusCode(http.StatusOK, http.StatusAccepted),
		autorest.ByClosing())
	result.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.FutureAPI != nil && result.FutureAPI.Response() != nil {
				sc = result.FutureAPI.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", nil, "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 = "2018-10-01"
	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
	}
	var azf azure.Future
	azf, err = azure.NewFutureFromResponse(resp)
	future.FutureAPI = &azf
	future.Result = future.result
	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 autorest.Response, err error) {
	err = autorest.Respond(
		resp,
		azure.WithErrorUnlessStatusCode(http.StatusOK, http.StatusAccepted),
		autorest.ByClosing())
	result.Response = resp
	return
}

// RunCommand run command 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.
// parameters - parameters supplied to the Run command operation.
func (client VirtualMachineScaleSetVMsClient) RunCommand(ctx context.Context, resourceGroupName string, VMScaleSetName string, instanceID string, parameters RunCommandInput) (result VirtualMachineScaleSetVMsRunCommandFuture, err error) {
	if tracing.IsEnabled() {
		ctx = tracing.StartSpan(ctx, fqdn+"/VirtualMachineScaleSetVMsClient.RunCommand")
		defer func() {
			sc := -1
			if result.FutureAPI != nil && result.FutureAPI.Response() != nil {
				sc = result.FutureAPI.Response().StatusCode
			}
			tracing.EndSpan(ctx, sc, err)
		}()
	}
	if err := validation.Validate([]validation.Validation{
		{TargetValue: parameters,
			Constraints: []validation.Constraint{{Target: "parameters.CommandID", Name: validation.Null, Rule: true, Chain: nil}}}}); err != nil {
		return result, validation.NewError("compute.VirtualMachineScaleSetVMsClient", "RunCommand", err.Error())
	}

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

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

	return
}

// RunCommandPreparer prepares the RunCommand request.
func (client VirtualMachineScaleSetVMsClient) RunCommandPreparer(ctx context.Context, resourceGroupName string, VMScaleSetName string, instanceID string, parameters RunCommandInput) (*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 = "2018-10-01"
	queryParameters := map[string]interface{}{
		"api-version": APIVersion,
	}

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

// RunCommandSender sends the RunCommand request. The method will close the
// http.Response Body if it receives an error.
func (client VirtualMachineScaleSetVMsClient) RunCommandSender(req *http.Request) (future VirtualMachineScaleSetVMsRunCommandFuture, err error) {
	var resp *http.Response
	resp, err = client.Send(req, azure.DoRetryWithRegistration(client.Client))
	if err != nil {
		return
	}
	var azf azure.Future
	azf, err = azure.NewFutureFromResponse(resp)
	future.FutureAPI = &azf
	future.Result = future.result
	return
}

// RunCommandResponder handles the response to the RunCommand request. The method always
// closes the http.Response Body.
func (client VirtualMachineScaleSetVMsClient) RunCommandResponder(resp *http.Response) (result RunCommandResult, err error) {
	err = autorest.Respond(
		resp,
		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.FutureAPI != nil && result.FutureAPI.Response() != nil {
				sc = result.FutureAPI.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", nil, "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 = "2018-10-01"
	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
	}
	var azf azure.Future
	azf, err = azure.NewFutureFromResponse(resp)
	future.FutureAPI = &azf
	future.Result = future.result
	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 autorest.Response, err error) {
	err = autorest.Respond(
		resp,
		azure.WithErrorUnlessStatusCode(http.StatusOK, http.StatusAccepted),
		autorest.ByClosing())
	result.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.FutureAPI != nil && result.FutureAPI.Response() != nil {
				sc = result.FutureAPI.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", nil, "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 = "2018-10-01"
	queryParameters := map[string]interface{}{
		"api-version": APIVersion,
	}

	parameters.InstanceID = nil
	parameters.Sku = nil
	parameters.Resources = nil
	parameters.Zones = 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
	}
	var azf azure.Future
	azf, err = azure.NewFutureFromResponse(resp)
	future.FutureAPI = &azf
	future.Result = future.result
	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,
		azure.WithErrorUnlessStatusCode(http.StatusOK, http.StatusAccepted),
		autorest.ByUnmarshallingJSON(&result),
		autorest.ByClosing())
	result.Response = autorest.Response{Response: resp}
	return
}
