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"
)

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

// NewVirtualMachineScaleSetsClient creates an instance of the VirtualMachineScaleSetsClient client.
func NewVirtualMachineScaleSetsClient(subscriptionID string) VirtualMachineScaleSetsClient {
	return NewVirtualMachineScaleSetsClientWithBaseURI(DefaultBaseURI, subscriptionID)
}

// NewVirtualMachineScaleSetsClientWithBaseURI creates an instance of the VirtualMachineScaleSetsClient client.
func NewVirtualMachineScaleSetsClientWithBaseURI(baseURI string, subscriptionID string) VirtualMachineScaleSetsClient {
	return VirtualMachineScaleSetsClient{NewWithBaseURI(baseURI, subscriptionID)}
}

// CreateOrUpdate create or update a VM scale set.
// Parameters:
// resourceGroupName - the name of the resource group.
// VMScaleSetName - the name of the VM scale set to create or update.
// parameters - the scale set object.
func (client VirtualMachineScaleSetsClient) CreateOrUpdate(ctx context.Context, resourceGroupName string, VMScaleSetName string, parameters VirtualMachineScaleSet) (result VirtualMachineScaleSetsCreateOrUpdateFuture, err error) {
	if tracing.IsEnabled() {
		ctx = tracing.StartSpan(ctx, fqdn+"/VirtualMachineScaleSetsClient.CreateOrUpdate")
		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.VirtualMachineScaleSetProperties", Name: validation.Null, Rule: false,
				Chain: []validation.Constraint{{Target: "parameters.VirtualMachineScaleSetProperties.UpgradePolicy", Name: validation.Null, Rule: false,
					Chain: []validation.Constraint{{Target: "parameters.VirtualMachineScaleSetProperties.UpgradePolicy.RollingUpgradePolicy", Name: validation.Null, Rule: false,
						Chain: []validation.Constraint{{Target: "parameters.VirtualMachineScaleSetProperties.UpgradePolicy.RollingUpgradePolicy.MaxBatchInstancePercent", Name: validation.Null, Rule: false,
							Chain: []validation.Constraint{{Target: "parameters.VirtualMachineScaleSetProperties.UpgradePolicy.RollingUpgradePolicy.MaxBatchInstancePercent", Name: validation.InclusiveMaximum, Rule: int64(100), Chain: nil},
								{Target: "parameters.VirtualMachineScaleSetProperties.UpgradePolicy.RollingUpgradePolicy.MaxBatchInstancePercent", Name: validation.InclusiveMinimum, Rule: 5, Chain: nil},
							}},
							{Target: "parameters.VirtualMachineScaleSetProperties.UpgradePolicy.RollingUpgradePolicy.MaxUnhealthyInstancePercent", Name: validation.Null, Rule: false,
								Chain: []validation.Constraint{{Target: "parameters.VirtualMachineScaleSetProperties.UpgradePolicy.RollingUpgradePolicy.MaxUnhealthyInstancePercent", Name: validation.InclusiveMaximum, Rule: int64(100), Chain: nil},
									{Target: "parameters.VirtualMachineScaleSetProperties.UpgradePolicy.RollingUpgradePolicy.MaxUnhealthyInstancePercent", Name: validation.InclusiveMinimum, Rule: 5, Chain: nil},
								}},
							{Target: "parameters.VirtualMachineScaleSetProperties.UpgradePolicy.RollingUpgradePolicy.MaxUnhealthyUpgradedInstancePercent", Name: validation.Null, Rule: false,
								Chain: []validation.Constraint{{Target: "parameters.VirtualMachineScaleSetProperties.UpgradePolicy.RollingUpgradePolicy.MaxUnhealthyUpgradedInstancePercent", Name: validation.InclusiveMaximum, Rule: int64(100), Chain: nil},
									{Target: "parameters.VirtualMachineScaleSetProperties.UpgradePolicy.RollingUpgradePolicy.MaxUnhealthyUpgradedInstancePercent", Name: validation.InclusiveMinimum, Rule: 0, Chain: nil},
								}},
						}},
					}},
				}}}}}); err != nil {
		return result, validation.NewError("compute.VirtualMachineScaleSetsClient", "CreateOrUpdate", err.Error())
	}

	req, err := client.CreateOrUpdatePreparer(ctx, resourceGroupName, VMScaleSetName, parameters)
	if err != nil {
		err = autorest.NewErrorWithError(err, "compute.VirtualMachineScaleSetsClient", "CreateOrUpdate", nil, "Failure preparing request")
		return
	}

	result, err = client.CreateOrUpdateSender(req)
	if err != nil {
		err = autorest.NewErrorWithError(err, "compute.VirtualMachineScaleSetsClient", "CreateOrUpdate", result.Response(), "Failure sending request")
		return
	}

	return
}

// CreateOrUpdatePreparer prepares the CreateOrUpdate request.
func (client VirtualMachineScaleSetsClient) CreateOrUpdatePreparer(ctx context.Context, resourceGroupName string, VMScaleSetName string, parameters VirtualMachineScaleSet) (*http.Request, error) {
	pathParameters := map[string]interface{}{
		"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.AsPut(),
		autorest.WithBaseURL(client.BaseURI),
		autorest.WithPathParameters("/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.Compute/virtualMachineScaleSets/{vmScaleSetName}", pathParameters),
		autorest.WithJSON(parameters),
		autorest.WithQueryParameters(queryParameters))
	return preparer.Prepare((&http.Request{}).WithContext(ctx))
}

// CreateOrUpdateSender sends the CreateOrUpdate request. The method will close the
// http.Response Body if it receives an error.
func (client VirtualMachineScaleSetsClient) CreateOrUpdateSender(req *http.Request) (future VirtualMachineScaleSetsCreateOrUpdateFuture, err error) {
	var resp *http.Response
	resp, err = autorest.SendWithSender(client, req,
		azure.DoRetryWithRegistration(client.Client))
	if err != nil {
		return
	}
	future.Future, err = azure.NewFutureFromResponse(resp)
	return
}

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

// Deallocate deallocates specific virtual machines in a VM scale set. Shuts down the virtual machines and releases the
// compute resources. You are not billed for the compute resources that this virtual machine scale set deallocates.
// Parameters:
// resourceGroupName - the name of the resource group.
// VMScaleSetName - the name of the VM scale set.
// VMInstanceIDs - a list of virtual machine instance IDs from the VM scale set.
func (client VirtualMachineScaleSetsClient) Deallocate(ctx context.Context, resourceGroupName string, VMScaleSetName string, VMInstanceIDs *VirtualMachineScaleSetVMInstanceIDs) (result VirtualMachineScaleSetsDeallocateFuture, err error) {
	if tracing.IsEnabled() {
		ctx = tracing.StartSpan(ctx, fqdn+"/VirtualMachineScaleSetsClient.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, VMInstanceIDs)
	if err != nil {
		err = autorest.NewErrorWithError(err, "compute.VirtualMachineScaleSetsClient", "Deallocate", nil, "Failure preparing request")
		return
	}

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

	return
}

// DeallocatePreparer prepares the Deallocate request.
func (client VirtualMachineScaleSetsClient) DeallocatePreparer(ctx context.Context, resourceGroupName string, VMScaleSetName string, VMInstanceIDs *VirtualMachineScaleSetVMInstanceIDs) (*http.Request, error) {
	pathParameters := map[string]interface{}{
		"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}/deallocate", pathParameters),
		autorest.WithQueryParameters(queryParameters))
	if VMInstanceIDs != nil {
		preparer = autorest.DecoratePreparer(preparer,
			autorest.WithJSON(VMInstanceIDs))
	}
	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 VirtualMachineScaleSetsClient) DeallocateSender(req *http.Request) (future VirtualMachineScaleSetsDeallocateFuture, err error) {
	var resp *http.Response
	resp, err = autorest.SendWithSender(client, 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 VirtualMachineScaleSetsClient) DeallocateResponder(resp *http.Response) (result autorest.Response, err error) {
	err = autorest.Respond(
		resp,
		client.ByInspecting(),
		azure.WithErrorUnlessStatusCode(http.StatusOK, http.StatusAccepted),
		autorest.ByClosing())
	result.Response = resp
	return
}

// Delete deletes a VM scale set.
// Parameters:
// resourceGroupName - the name of the resource group.
// VMScaleSetName - the name of the VM scale set.
func (client VirtualMachineScaleSetsClient) Delete(ctx context.Context, resourceGroupName string, VMScaleSetName string) (result VirtualMachineScaleSetsDeleteFuture, err error) {
	if tracing.IsEnabled() {
		ctx = tracing.StartSpan(ctx, fqdn+"/VirtualMachineScaleSetsClient.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)
	if err != nil {
		err = autorest.NewErrorWithError(err, "compute.VirtualMachineScaleSetsClient", "Delete", nil, "Failure preparing request")
		return
	}

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

	return
}

// DeletePreparer prepares the Delete request.
func (client VirtualMachineScaleSetsClient) DeletePreparer(ctx context.Context, resourceGroupName string, VMScaleSetName string) (*http.Request, error) {
	pathParameters := map[string]interface{}{
		"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}", 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 VirtualMachineScaleSetsClient) DeleteSender(req *http.Request) (future VirtualMachineScaleSetsDeleteFuture, err error) {
	var resp *http.Response
	resp, err = autorest.SendWithSender(client, 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 VirtualMachineScaleSetsClient) DeleteResponder(resp *http.Response) (result autorest.Response, err error) {
	err = autorest.Respond(
		resp,
		client.ByInspecting(),
		azure.WithErrorUnlessStatusCode(http.StatusOK, http.StatusAccepted, http.StatusNoContent),
		autorest.ByClosing())
	result.Response = resp
	return
}

// DeleteInstances deletes virtual machines in a VM scale set.
// Parameters:
// resourceGroupName - the name of the resource group.
// VMScaleSetName - the name of the VM scale set.
// VMInstanceIDs - a list of virtual machine instance IDs from the VM scale set.
func (client VirtualMachineScaleSetsClient) DeleteInstances(ctx context.Context, resourceGroupName string, VMScaleSetName string, VMInstanceIDs VirtualMachineScaleSetVMInstanceRequiredIDs) (result VirtualMachineScaleSetsDeleteInstancesFuture, err error) {
	if tracing.IsEnabled() {
		ctx = tracing.StartSpan(ctx, fqdn+"/VirtualMachineScaleSetsClient.DeleteInstances")
		defer func() {
			sc := -1
			if result.Response() != nil {
				sc = result.Response().StatusCode
			}
			tracing.EndSpan(ctx, sc, err)
		}()
	}
	if err := validation.Validate([]validation.Validation{
		{TargetValue: VMInstanceIDs,
			Constraints: []validation.Constraint{{Target: "VMInstanceIDs.InstanceIds", Name: validation.Null, Rule: true, Chain: nil}}}}); err != nil {
		return result, validation.NewError("compute.VirtualMachineScaleSetsClient", "DeleteInstances", err.Error())
	}

	req, err := client.DeleteInstancesPreparer(ctx, resourceGroupName, VMScaleSetName, VMInstanceIDs)
	if err != nil {
		err = autorest.NewErrorWithError(err, "compute.VirtualMachineScaleSetsClient", "DeleteInstances", nil, "Failure preparing request")
		return
	}

	result, err = client.DeleteInstancesSender(req)
	if err != nil {
		err = autorest.NewErrorWithError(err, "compute.VirtualMachineScaleSetsClient", "DeleteInstances", result.Response(), "Failure sending request")
		return
	}

	return
}

// DeleteInstancesPreparer prepares the DeleteInstances request.
func (client VirtualMachineScaleSetsClient) DeleteInstancesPreparer(ctx context.Context, resourceGroupName string, VMScaleSetName string, VMInstanceIDs VirtualMachineScaleSetVMInstanceRequiredIDs) (*http.Request, error) {
	pathParameters := map[string]interface{}{
		"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}/delete", pathParameters),
		autorest.WithJSON(VMInstanceIDs),
		autorest.WithQueryParameters(queryParameters))
	return preparer.Prepare((&http.Request{}).WithContext(ctx))
}

// DeleteInstancesSender sends the DeleteInstances request. The method will close the
// http.Response Body if it receives an error.
func (client VirtualMachineScaleSetsClient) DeleteInstancesSender(req *http.Request) (future VirtualMachineScaleSetsDeleteInstancesFuture, err error) {
	var resp *http.Response
	resp, err = autorest.SendWithSender(client, req,
		azure.DoRetryWithRegistration(client.Client))
	if err != nil {
		return
	}
	future.Future, err = azure.NewFutureFromResponse(resp)
	return
}

// DeleteInstancesResponder handles the response to the DeleteInstances request. The method always
// closes the http.Response Body.
func (client VirtualMachineScaleSetsClient) DeleteInstancesResponder(resp *http.Response) (result autorest.Response, err error) {
	err = autorest.Respond(
		resp,
		client.ByInspecting(),
		azure.WithErrorUnlessStatusCode(http.StatusOK, http.StatusAccepted),
		autorest.ByClosing())
	result.Response = resp
	return
}

// ForceRecoveryServiceFabricPlatformUpdateDomainWalk manual platform update domain walk to update virtual machines in
// a service fabric virtual machine scale set.
// Parameters:
// resourceGroupName - the name of the resource group.
// VMScaleSetName - the name of the VM scale set.
// platformUpdateDomain - the platform update domain for which a manual recovery walk is requested
func (client VirtualMachineScaleSetsClient) ForceRecoveryServiceFabricPlatformUpdateDomainWalk(ctx context.Context, resourceGroupName string, VMScaleSetName string, platformUpdateDomain int32) (result RecoveryWalkResponse, err error) {
	if tracing.IsEnabled() {
		ctx = tracing.StartSpan(ctx, fqdn+"/VirtualMachineScaleSetsClient.ForceRecoveryServiceFabricPlatformUpdateDomainWalk")
		defer func() {
			sc := -1
			if result.Response.Response != nil {
				sc = result.Response.Response.StatusCode
			}
			tracing.EndSpan(ctx, sc, err)
		}()
	}
	req, err := client.ForceRecoveryServiceFabricPlatformUpdateDomainWalkPreparer(ctx, resourceGroupName, VMScaleSetName, platformUpdateDomain)
	if err != nil {
		err = autorest.NewErrorWithError(err, "compute.VirtualMachineScaleSetsClient", "ForceRecoveryServiceFabricPlatformUpdateDomainWalk", nil, "Failure preparing request")
		return
	}

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

	result, err = client.ForceRecoveryServiceFabricPlatformUpdateDomainWalkResponder(resp)
	if err != nil {
		err = autorest.NewErrorWithError(err, "compute.VirtualMachineScaleSetsClient", "ForceRecoveryServiceFabricPlatformUpdateDomainWalk", resp, "Failure responding to request")
	}

	return
}

// ForceRecoveryServiceFabricPlatformUpdateDomainWalkPreparer prepares the ForceRecoveryServiceFabricPlatformUpdateDomainWalk request.
func (client VirtualMachineScaleSetsClient) ForceRecoveryServiceFabricPlatformUpdateDomainWalkPreparer(ctx context.Context, resourceGroupName string, VMScaleSetName string, platformUpdateDomain int32) (*http.Request, error) {
	pathParameters := map[string]interface{}{
		"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,
		"platformUpdateDomain": autorest.Encode("query", platformUpdateDomain),
	}

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

// ForceRecoveryServiceFabricPlatformUpdateDomainWalkSender sends the ForceRecoveryServiceFabricPlatformUpdateDomainWalk request. The method will close the
// http.Response Body if it receives an error.
func (client VirtualMachineScaleSetsClient) ForceRecoveryServiceFabricPlatformUpdateDomainWalkSender(req *http.Request) (*http.Response, error) {
	return autorest.SendWithSender(client, req,
		azure.DoRetryWithRegistration(client.Client))
}

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

// Get display information about a virtual machine scale set.
// Parameters:
// resourceGroupName - the name of the resource group.
// VMScaleSetName - the name of the VM scale set.
func (client VirtualMachineScaleSetsClient) Get(ctx context.Context, resourceGroupName string, VMScaleSetName string) (result VirtualMachineScaleSet, err error) {
	if tracing.IsEnabled() {
		ctx = tracing.StartSpan(ctx, fqdn+"/VirtualMachineScaleSetsClient.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)
	if err != nil {
		err = autorest.NewErrorWithError(err, "compute.VirtualMachineScaleSetsClient", "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.VirtualMachineScaleSetsClient", "Get", resp, "Failure sending request")
		return
	}

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

	return
}

// GetPreparer prepares the Get request.
func (client VirtualMachineScaleSetsClient) GetPreparer(ctx context.Context, resourceGroupName string, VMScaleSetName string) (*http.Request, error) {
	pathParameters := map[string]interface{}{
		"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}", 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 VirtualMachineScaleSetsClient) GetSender(req *http.Request) (*http.Response, error) {
	return autorest.SendWithSender(client, req,
		azure.DoRetryWithRegistration(client.Client))
}

// GetResponder handles the response to the Get request. The method always
// closes the http.Response Body.
func (client VirtualMachineScaleSetsClient) GetResponder(resp *http.Response) (result VirtualMachineScaleSet, 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 VM scale set instance.
// Parameters:
// resourceGroupName - the name of the resource group.
// VMScaleSetName - the name of the VM scale set.
func (client VirtualMachineScaleSetsClient) GetInstanceView(ctx context.Context, resourceGroupName string, VMScaleSetName string) (result VirtualMachineScaleSetInstanceView, err error) {
	if tracing.IsEnabled() {
		ctx = tracing.StartSpan(ctx, fqdn+"/VirtualMachineScaleSetsClient.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)
	if err != nil {
		err = autorest.NewErrorWithError(err, "compute.VirtualMachineScaleSetsClient", "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.VirtualMachineScaleSetsClient", "GetInstanceView", resp, "Failure sending request")
		return
	}

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

	return
}

// GetInstanceViewPreparer prepares the GetInstanceView request.
func (client VirtualMachineScaleSetsClient) GetInstanceViewPreparer(ctx context.Context, resourceGroupName string, VMScaleSetName string) (*http.Request, error) {
	pathParameters := map[string]interface{}{
		"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}/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 VirtualMachineScaleSetsClient) GetInstanceViewSender(req *http.Request) (*http.Response, error) {
	return autorest.SendWithSender(client, req,
		azure.DoRetryWithRegistration(client.Client))
}

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

// GetOSUpgradeHistory gets list of OS upgrades on a VM scale set instance.
// Parameters:
// resourceGroupName - the name of the resource group.
// VMScaleSetName - the name of the VM scale set.
func (client VirtualMachineScaleSetsClient) GetOSUpgradeHistory(ctx context.Context, resourceGroupName string, VMScaleSetName string) (result VirtualMachineScaleSetListOSUpgradeHistoryPage, err error) {
	if tracing.IsEnabled() {
		ctx = tracing.StartSpan(ctx, fqdn+"/VirtualMachineScaleSetsClient.GetOSUpgradeHistory")
		defer func() {
			sc := -1
			if result.vmsslouh.Response.Response != nil {
				sc = result.vmsslouh.Response.Response.StatusCode
			}
			tracing.EndSpan(ctx, sc, err)
		}()
	}
	result.fn = client.getOSUpgradeHistoryNextResults
	req, err := client.GetOSUpgradeHistoryPreparer(ctx, resourceGroupName, VMScaleSetName)
	if err != nil {
		err = autorest.NewErrorWithError(err, "compute.VirtualMachineScaleSetsClient", "GetOSUpgradeHistory", nil, "Failure preparing request")
		return
	}

	resp, err := client.GetOSUpgradeHistorySender(req)
	if err != nil {
		result.vmsslouh.Response = autorest.Response{Response: resp}
		err = autorest.NewErrorWithError(err, "compute.VirtualMachineScaleSetsClient", "GetOSUpgradeHistory", resp, "Failure sending request")
		return
	}

	result.vmsslouh, err = client.GetOSUpgradeHistoryResponder(resp)
	if err != nil {
		err = autorest.NewErrorWithError(err, "compute.VirtualMachineScaleSetsClient", "GetOSUpgradeHistory", resp, "Failure responding to request")
	}

	return
}

// GetOSUpgradeHistoryPreparer prepares the GetOSUpgradeHistory request.
func (client VirtualMachineScaleSetsClient) GetOSUpgradeHistoryPreparer(ctx context.Context, resourceGroupName string, VMScaleSetName string) (*http.Request, error) {
	pathParameters := map[string]interface{}{
		"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}/osUpgradeHistory", pathParameters),
		autorest.WithQueryParameters(queryParameters))
	return preparer.Prepare((&http.Request{}).WithContext(ctx))
}

// GetOSUpgradeHistorySender sends the GetOSUpgradeHistory request. The method will close the
// http.Response Body if it receives an error.
func (client VirtualMachineScaleSetsClient) GetOSUpgradeHistorySender(req *http.Request) (*http.Response, error) {
	return autorest.SendWithSender(client, req,
		azure.DoRetryWithRegistration(client.Client))
}

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

// getOSUpgradeHistoryNextResults retrieves the next set of results, if any.
func (client VirtualMachineScaleSetsClient) getOSUpgradeHistoryNextResults(ctx context.Context, lastResults VirtualMachineScaleSetListOSUpgradeHistory) (result VirtualMachineScaleSetListOSUpgradeHistory, err error) {
	req, err := lastResults.virtualMachineScaleSetListOSUpgradeHistoryPreparer(ctx)
	if err != nil {
		return result, autorest.NewErrorWithError(err, "compute.VirtualMachineScaleSetsClient", "getOSUpgradeHistoryNextResults", nil, "Failure preparing next results request")
	}
	if req == nil {
		return
	}
	resp, err := client.GetOSUpgradeHistorySender(req)
	if err != nil {
		result.Response = autorest.Response{Response: resp}
		return result, autorest.NewErrorWithError(err, "compute.VirtualMachineScaleSetsClient", "getOSUpgradeHistoryNextResults", resp, "Failure sending next results request")
	}
	result, err = client.GetOSUpgradeHistoryResponder(resp)
	if err != nil {
		err = autorest.NewErrorWithError(err, "compute.VirtualMachineScaleSetsClient", "getOSUpgradeHistoryNextResults", resp, "Failure responding to next results request")
	}
	return
}

// GetOSUpgradeHistoryComplete enumerates all values, automatically crossing page boundaries as required.
func (client VirtualMachineScaleSetsClient) GetOSUpgradeHistoryComplete(ctx context.Context, resourceGroupName string, VMScaleSetName string) (result VirtualMachineScaleSetListOSUpgradeHistoryIterator, err error) {
	if tracing.IsEnabled() {
		ctx = tracing.StartSpan(ctx, fqdn+"/VirtualMachineScaleSetsClient.GetOSUpgradeHistory")
		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.GetOSUpgradeHistory(ctx, resourceGroupName, VMScaleSetName)
	return
}

// List gets a list of all VM scale sets under a resource group.
// Parameters:
// resourceGroupName - the name of the resource group.
func (client VirtualMachineScaleSetsClient) List(ctx context.Context, resourceGroupName string) (result VirtualMachineScaleSetListResultPage, err error) {
	if tracing.IsEnabled() {
		ctx = tracing.StartSpan(ctx, fqdn+"/VirtualMachineScaleSetsClient.List")
		defer func() {
			sc := -1
			if result.vmsslr.Response.Response != nil {
				sc = result.vmsslr.Response.Response.StatusCode
			}
			tracing.EndSpan(ctx, sc, err)
		}()
	}
	result.fn = client.listNextResults
	req, err := client.ListPreparer(ctx, resourceGroupName)
	if err != nil {
		err = autorest.NewErrorWithError(err, "compute.VirtualMachineScaleSetsClient", "List", nil, "Failure preparing request")
		return
	}

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

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

	return
}

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

	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", 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 VirtualMachineScaleSetsClient) ListSender(req *http.Request) (*http.Response, error) {
	return autorest.SendWithSender(client, req,
		azure.DoRetryWithRegistration(client.Client))
}

// ListResponder handles the response to the List request. The method always
// closes the http.Response Body.
func (client VirtualMachineScaleSetsClient) ListResponder(resp *http.Response) (result VirtualMachineScaleSetListResult, 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 VirtualMachineScaleSetsClient) listNextResults(ctx context.Context, lastResults VirtualMachineScaleSetListResult) (result VirtualMachineScaleSetListResult, err error) {
	req, err := lastResults.virtualMachineScaleSetListResultPreparer(ctx)
	if err != nil {
		return result, autorest.NewErrorWithError(err, "compute.VirtualMachineScaleSetsClient", "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.VirtualMachineScaleSetsClient", "listNextResults", resp, "Failure sending next results request")
	}
	result, err = client.ListResponder(resp)
	if err != nil {
		err = autorest.NewErrorWithError(err, "compute.VirtualMachineScaleSetsClient", "listNextResults", resp, "Failure responding to next results request")
	}
	return
}

// ListComplete enumerates all values, automatically crossing page boundaries as required.
func (client VirtualMachineScaleSetsClient) ListComplete(ctx context.Context, resourceGroupName string) (result VirtualMachineScaleSetListResultIterator, err error) {
	if tracing.IsEnabled() {
		ctx = tracing.StartSpan(ctx, fqdn+"/VirtualMachineScaleSetsClient.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)
	return
}

// ListAll gets a list of all VM Scale Sets in the subscription, regardless of the associated resource group. Use
// nextLink property in the response to get the next page of VM Scale Sets. Do this till nextLink is null to fetch all
// the VM Scale Sets.
func (client VirtualMachineScaleSetsClient) ListAll(ctx context.Context) (result VirtualMachineScaleSetListWithLinkResultPage, err error) {
	if tracing.IsEnabled() {
		ctx = tracing.StartSpan(ctx, fqdn+"/VirtualMachineScaleSetsClient.ListAll")
		defer func() {
			sc := -1
			if result.vmsslwlr.Response.Response != nil {
				sc = result.vmsslwlr.Response.Response.StatusCode
			}
			tracing.EndSpan(ctx, sc, err)
		}()
	}
	result.fn = client.listAllNextResults
	req, err := client.ListAllPreparer(ctx)
	if err != nil {
		err = autorest.NewErrorWithError(err, "compute.VirtualMachineScaleSetsClient", "ListAll", nil, "Failure preparing request")
		return
	}

	resp, err := client.ListAllSender(req)
	if err != nil {
		result.vmsslwlr.Response = autorest.Response{Response: resp}
		err = autorest.NewErrorWithError(err, "compute.VirtualMachineScaleSetsClient", "ListAll", resp, "Failure sending request")
		return
	}

	result.vmsslwlr, err = client.ListAllResponder(resp)
	if err != nil {
		err = autorest.NewErrorWithError(err, "compute.VirtualMachineScaleSetsClient", "ListAll", resp, "Failure responding to request")
	}

	return
}

// ListAllPreparer prepares the ListAll request.
func (client VirtualMachineScaleSetsClient) ListAllPreparer(ctx context.Context) (*http.Request, error) {
	pathParameters := map[string]interface{}{
		"subscriptionId": autorest.Encode("path", client.SubscriptionID),
	}

	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}/providers/Microsoft.Compute/virtualMachineScaleSets", pathParameters),
		autorest.WithQueryParameters(queryParameters))
	return preparer.Prepare((&http.Request{}).WithContext(ctx))
}

// ListAllSender sends the ListAll request. The method will close the
// http.Response Body if it receives an error.
func (client VirtualMachineScaleSetsClient) ListAllSender(req *http.Request) (*http.Response, error) {
	return autorest.SendWithSender(client, req,
		azure.DoRetryWithRegistration(client.Client))
}

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

// listAllNextResults retrieves the next set of results, if any.
func (client VirtualMachineScaleSetsClient) listAllNextResults(ctx context.Context, lastResults VirtualMachineScaleSetListWithLinkResult) (result VirtualMachineScaleSetListWithLinkResult, err error) {
	req, err := lastResults.virtualMachineScaleSetListWithLinkResultPreparer(ctx)
	if err != nil {
		return result, autorest.NewErrorWithError(err, "compute.VirtualMachineScaleSetsClient", "listAllNextResults", nil, "Failure preparing next results request")
	}
	if req == nil {
		return
	}
	resp, err := client.ListAllSender(req)
	if err != nil {
		result.Response = autorest.Response{Response: resp}
		return result, autorest.NewErrorWithError(err, "compute.VirtualMachineScaleSetsClient", "listAllNextResults", resp, "Failure sending next results request")
	}
	result, err = client.ListAllResponder(resp)
	if err != nil {
		err = autorest.NewErrorWithError(err, "compute.VirtualMachineScaleSetsClient", "listAllNextResults", resp, "Failure responding to next results request")
	}
	return
}

// ListAllComplete enumerates all values, automatically crossing page boundaries as required.
func (client VirtualMachineScaleSetsClient) ListAllComplete(ctx context.Context) (result VirtualMachineScaleSetListWithLinkResultIterator, err error) {
	if tracing.IsEnabled() {
		ctx = tracing.StartSpan(ctx, fqdn+"/VirtualMachineScaleSetsClient.ListAll")
		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.ListAll(ctx)
	return
}

// ListSkus gets a list of SKUs available for your VM scale set, including the minimum and maximum VM instances allowed
// for each SKU.
// Parameters:
// resourceGroupName - the name of the resource group.
// VMScaleSetName - the name of the VM scale set.
func (client VirtualMachineScaleSetsClient) ListSkus(ctx context.Context, resourceGroupName string, VMScaleSetName string) (result VirtualMachineScaleSetListSkusResultPage, err error) {
	if tracing.IsEnabled() {
		ctx = tracing.StartSpan(ctx, fqdn+"/VirtualMachineScaleSetsClient.ListSkus")
		defer func() {
			sc := -1
			if result.vmsslsr.Response.Response != nil {
				sc = result.vmsslsr.Response.Response.StatusCode
			}
			tracing.EndSpan(ctx, sc, err)
		}()
	}
	result.fn = client.listSkusNextResults
	req, err := client.ListSkusPreparer(ctx, resourceGroupName, VMScaleSetName)
	if err != nil {
		err = autorest.NewErrorWithError(err, "compute.VirtualMachineScaleSetsClient", "ListSkus", nil, "Failure preparing request")
		return
	}

	resp, err := client.ListSkusSender(req)
	if err != nil {
		result.vmsslsr.Response = autorest.Response{Response: resp}
		err = autorest.NewErrorWithError(err, "compute.VirtualMachineScaleSetsClient", "ListSkus", resp, "Failure sending request")
		return
	}

	result.vmsslsr, err = client.ListSkusResponder(resp)
	if err != nil {
		err = autorest.NewErrorWithError(err, "compute.VirtualMachineScaleSetsClient", "ListSkus", resp, "Failure responding to request")
	}

	return
}

// ListSkusPreparer prepares the ListSkus request.
func (client VirtualMachineScaleSetsClient) ListSkusPreparer(ctx context.Context, resourceGroupName string, VMScaleSetName string) (*http.Request, error) {
	pathParameters := map[string]interface{}{
		"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}/skus", pathParameters),
		autorest.WithQueryParameters(queryParameters))
	return preparer.Prepare((&http.Request{}).WithContext(ctx))
}

// ListSkusSender sends the ListSkus request. The method will close the
// http.Response Body if it receives an error.
func (client VirtualMachineScaleSetsClient) ListSkusSender(req *http.Request) (*http.Response, error) {
	return autorest.SendWithSender(client, req,
		azure.DoRetryWithRegistration(client.Client))
}

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

// listSkusNextResults retrieves the next set of results, if any.
func (client VirtualMachineScaleSetsClient) listSkusNextResults(ctx context.Context, lastResults VirtualMachineScaleSetListSkusResult) (result VirtualMachineScaleSetListSkusResult, err error) {
	req, err := lastResults.virtualMachineScaleSetListSkusResultPreparer(ctx)
	if err != nil {
		return result, autorest.NewErrorWithError(err, "compute.VirtualMachineScaleSetsClient", "listSkusNextResults", nil, "Failure preparing next results request")
	}
	if req == nil {
		return
	}
	resp, err := client.ListSkusSender(req)
	if err != nil {
		result.Response = autorest.Response{Response: resp}
		return result, autorest.NewErrorWithError(err, "compute.VirtualMachineScaleSetsClient", "listSkusNextResults", resp, "Failure sending next results request")
	}
	result, err = client.ListSkusResponder(resp)
	if err != nil {
		err = autorest.NewErrorWithError(err, "compute.VirtualMachineScaleSetsClient", "listSkusNextResults", resp, "Failure responding to next results request")
	}
	return
}

// ListSkusComplete enumerates all values, automatically crossing page boundaries as required.
func (client VirtualMachineScaleSetsClient) ListSkusComplete(ctx context.Context, resourceGroupName string, VMScaleSetName string) (result VirtualMachineScaleSetListSkusResultIterator, err error) {
	if tracing.IsEnabled() {
		ctx = tracing.StartSpan(ctx, fqdn+"/VirtualMachineScaleSetsClient.ListSkus")
		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.ListSkus(ctx, resourceGroupName, VMScaleSetName)
	return
}

// PerformMaintenance perform maintenance on one or more virtual machines in a VM scale set. Operation on instances
// which are not eligible for perform maintenance will be failed. Please refer to best practices for more details:
// https://docs.microsoft.com/en-us/azure/virtual-machine-scale-sets/virtual-machine-scale-sets-maintenance-notifications
// Parameters:
// resourceGroupName - the name of the resource group.
// VMScaleSetName - the name of the VM scale set.
// VMInstanceIDs - a list of virtual machine instance IDs from the VM scale set.
func (client VirtualMachineScaleSetsClient) PerformMaintenance(ctx context.Context, resourceGroupName string, VMScaleSetName string, VMInstanceIDs *VirtualMachineScaleSetVMInstanceIDs) (result VirtualMachineScaleSetsPerformMaintenanceFuture, err error) {
	if tracing.IsEnabled() {
		ctx = tracing.StartSpan(ctx, fqdn+"/VirtualMachineScaleSetsClient.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, VMInstanceIDs)
	if err != nil {
		err = autorest.NewErrorWithError(err, "compute.VirtualMachineScaleSetsClient", "PerformMaintenance", nil, "Failure preparing request")
		return
	}

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

	return
}

// PerformMaintenancePreparer prepares the PerformMaintenance request.
func (client VirtualMachineScaleSetsClient) PerformMaintenancePreparer(ctx context.Context, resourceGroupName string, VMScaleSetName string, VMInstanceIDs *VirtualMachineScaleSetVMInstanceIDs) (*http.Request, error) {
	pathParameters := map[string]interface{}{
		"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}/performMaintenance", pathParameters),
		autorest.WithQueryParameters(queryParameters))
	if VMInstanceIDs != nil {
		preparer = autorest.DecoratePreparer(preparer,
			autorest.WithJSON(VMInstanceIDs))
	}
	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 VirtualMachineScaleSetsClient) PerformMaintenanceSender(req *http.Request) (future VirtualMachineScaleSetsPerformMaintenanceFuture, err error) {
	var resp *http.Response
	resp, err = autorest.SendWithSender(client, 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 VirtualMachineScaleSetsClient) PerformMaintenanceResponder(resp *http.Response) (result autorest.Response, err error) {
	err = autorest.Respond(
		resp,
		client.ByInspecting(),
		azure.WithErrorUnlessStatusCode(http.StatusOK, http.StatusAccepted),
		autorest.ByClosing())
	result.Response = resp
	return
}

// PowerOff power off (stop) one or more virtual machines 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.
// VMInstanceIDs - a list of virtual machine instance IDs from the VM scale set.
func (client VirtualMachineScaleSetsClient) PowerOff(ctx context.Context, resourceGroupName string, VMScaleSetName string, VMInstanceIDs *VirtualMachineScaleSetVMInstanceIDs) (result VirtualMachineScaleSetsPowerOffFuture, err error) {
	if tracing.IsEnabled() {
		ctx = tracing.StartSpan(ctx, fqdn+"/VirtualMachineScaleSetsClient.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, VMInstanceIDs)
	if err != nil {
		err = autorest.NewErrorWithError(err, "compute.VirtualMachineScaleSetsClient", "PowerOff", nil, "Failure preparing request")
		return
	}

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

	return
}

// PowerOffPreparer prepares the PowerOff request.
func (client VirtualMachineScaleSetsClient) PowerOffPreparer(ctx context.Context, resourceGroupName string, VMScaleSetName string, VMInstanceIDs *VirtualMachineScaleSetVMInstanceIDs) (*http.Request, error) {
	pathParameters := map[string]interface{}{
		"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}/poweroff", pathParameters),
		autorest.WithQueryParameters(queryParameters))
	if VMInstanceIDs != nil {
		preparer = autorest.DecoratePreparer(preparer,
			autorest.WithJSON(VMInstanceIDs))
	}
	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 VirtualMachineScaleSetsClient) PowerOffSender(req *http.Request) (future VirtualMachineScaleSetsPowerOffFuture, err error) {
	var resp *http.Response
	resp, err = autorest.SendWithSender(client, 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 VirtualMachineScaleSetsClient) PowerOffResponder(resp *http.Response) (result autorest.Response, err error) {
	err = autorest.Respond(
		resp,
		client.ByInspecting(),
		azure.WithErrorUnlessStatusCode(http.StatusOK, http.StatusAccepted),
		autorest.ByClosing())
	result.Response = resp
	return
}

// Redeploy redeploy one or more virtual machines in a VM scale set.
// Parameters:
// resourceGroupName - the name of the resource group.
// VMScaleSetName - the name of the VM scale set.
// VMInstanceIDs - a list of virtual machine instance IDs from the VM scale set.
func (client VirtualMachineScaleSetsClient) Redeploy(ctx context.Context, resourceGroupName string, VMScaleSetName string, VMInstanceIDs *VirtualMachineScaleSetVMInstanceIDs) (result VirtualMachineScaleSetsRedeployFuture, err error) {
	if tracing.IsEnabled() {
		ctx = tracing.StartSpan(ctx, fqdn+"/VirtualMachineScaleSetsClient.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, VMInstanceIDs)
	if err != nil {
		err = autorest.NewErrorWithError(err, "compute.VirtualMachineScaleSetsClient", "Redeploy", nil, "Failure preparing request")
		return
	}

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

	return
}

// RedeployPreparer prepares the Redeploy request.
func (client VirtualMachineScaleSetsClient) RedeployPreparer(ctx context.Context, resourceGroupName string, VMScaleSetName string, VMInstanceIDs *VirtualMachineScaleSetVMInstanceIDs) (*http.Request, error) {
	pathParameters := map[string]interface{}{
		"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}/redeploy", pathParameters),
		autorest.WithQueryParameters(queryParameters))
	if VMInstanceIDs != nil {
		preparer = autorest.DecoratePreparer(preparer,
			autorest.WithJSON(VMInstanceIDs))
	}
	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 VirtualMachineScaleSetsClient) RedeploySender(req *http.Request) (future VirtualMachineScaleSetsRedeployFuture, err error) {
	var resp *http.Response
	resp, err = autorest.SendWithSender(client, 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 VirtualMachineScaleSetsClient) RedeployResponder(resp *http.Response) (result autorest.Response, err error) {
	err = autorest.Respond(
		resp,
		client.ByInspecting(),
		azure.WithErrorUnlessStatusCode(http.StatusOK, http.StatusAccepted),
		autorest.ByClosing())
	result.Response = resp
	return
}

// Reimage reimages (upgrade the operating system) one or more virtual machines in a VM scale set.
// Parameters:
// resourceGroupName - the name of the resource group.
// VMScaleSetName - the name of the VM scale set.
// VMScaleSetReimageInput - parameters for Reimaging VM ScaleSet.
func (client VirtualMachineScaleSetsClient) Reimage(ctx context.Context, resourceGroupName string, VMScaleSetName string, VMScaleSetReimageInput *VirtualMachineScaleSetReimageParameters) (result VirtualMachineScaleSetsReimageFuture, err error) {
	if tracing.IsEnabled() {
		ctx = tracing.StartSpan(ctx, fqdn+"/VirtualMachineScaleSetsClient.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, VMScaleSetReimageInput)
	if err != nil {
		err = autorest.NewErrorWithError(err, "compute.VirtualMachineScaleSetsClient", "Reimage", nil, "Failure preparing request")
		return
	}

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

	return
}

// ReimagePreparer prepares the Reimage request.
func (client VirtualMachineScaleSetsClient) ReimagePreparer(ctx context.Context, resourceGroupName string, VMScaleSetName string, VMScaleSetReimageInput *VirtualMachineScaleSetReimageParameters) (*http.Request, error) {
	pathParameters := map[string]interface{}{
		"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}/reimage", pathParameters),
		autorest.WithQueryParameters(queryParameters))
	if VMScaleSetReimageInput != nil {
		preparer = autorest.DecoratePreparer(preparer,
			autorest.WithJSON(VMScaleSetReimageInput))
	}
	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 VirtualMachineScaleSetsClient) ReimageSender(req *http.Request) (future VirtualMachineScaleSetsReimageFuture, err error) {
	var resp *http.Response
	resp, err = autorest.SendWithSender(client, 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 VirtualMachineScaleSetsClient) ReimageResponder(resp *http.Response) (result autorest.Response, err error) {
	err = autorest.Respond(
		resp,
		client.ByInspecting(),
		azure.WithErrorUnlessStatusCode(http.StatusOK, http.StatusAccepted),
		autorest.ByClosing())
	result.Response = resp
	return
}

// ReimageAll reimages all the disks ( including data disks ) in the virtual machines in a VM scale set. This operation
// is only supported for managed disks.
// Parameters:
// resourceGroupName - the name of the resource group.
// VMScaleSetName - the name of the VM scale set.
// VMInstanceIDs - a list of virtual machine instance IDs from the VM scale set.
func (client VirtualMachineScaleSetsClient) ReimageAll(ctx context.Context, resourceGroupName string, VMScaleSetName string, VMInstanceIDs *VirtualMachineScaleSetVMInstanceIDs) (result VirtualMachineScaleSetsReimageAllFuture, err error) {
	if tracing.IsEnabled() {
		ctx = tracing.StartSpan(ctx, fqdn+"/VirtualMachineScaleSetsClient.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, VMInstanceIDs)
	if err != nil {
		err = autorest.NewErrorWithError(err, "compute.VirtualMachineScaleSetsClient", "ReimageAll", nil, "Failure preparing request")
		return
	}

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

	return
}

// ReimageAllPreparer prepares the ReimageAll request.
func (client VirtualMachineScaleSetsClient) ReimageAllPreparer(ctx context.Context, resourceGroupName string, VMScaleSetName string, VMInstanceIDs *VirtualMachineScaleSetVMInstanceIDs) (*http.Request, error) {
	pathParameters := map[string]interface{}{
		"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}/reimageall", pathParameters),
		autorest.WithQueryParameters(queryParameters))
	if VMInstanceIDs != nil {
		preparer = autorest.DecoratePreparer(preparer,
			autorest.WithJSON(VMInstanceIDs))
	}
	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 VirtualMachineScaleSetsClient) ReimageAllSender(req *http.Request) (future VirtualMachineScaleSetsReimageAllFuture, err error) {
	var resp *http.Response
	resp, err = autorest.SendWithSender(client, 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 VirtualMachineScaleSetsClient) ReimageAllResponder(resp *http.Response) (result autorest.Response, err error) {
	err = autorest.Respond(
		resp,
		client.ByInspecting(),
		azure.WithErrorUnlessStatusCode(http.StatusOK, http.StatusAccepted),
		autorest.ByClosing())
	result.Response = resp
	return
}

// Restart restarts one or more virtual machines in a VM scale set.
// Parameters:
// resourceGroupName - the name of the resource group.
// VMScaleSetName - the name of the VM scale set.
// VMInstanceIDs - a list of virtual machine instance IDs from the VM scale set.
func (client VirtualMachineScaleSetsClient) Restart(ctx context.Context, resourceGroupName string, VMScaleSetName string, VMInstanceIDs *VirtualMachineScaleSetVMInstanceIDs) (result VirtualMachineScaleSetsRestartFuture, err error) {
	if tracing.IsEnabled() {
		ctx = tracing.StartSpan(ctx, fqdn+"/VirtualMachineScaleSetsClient.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, VMInstanceIDs)
	if err != nil {
		err = autorest.NewErrorWithError(err, "compute.VirtualMachineScaleSetsClient", "Restart", nil, "Failure preparing request")
		return
	}

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

	return
}

// RestartPreparer prepares the Restart request.
func (client VirtualMachineScaleSetsClient) RestartPreparer(ctx context.Context, resourceGroupName string, VMScaleSetName string, VMInstanceIDs *VirtualMachineScaleSetVMInstanceIDs) (*http.Request, error) {
	pathParameters := map[string]interface{}{
		"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}/restart", pathParameters),
		autorest.WithQueryParameters(queryParameters))
	if VMInstanceIDs != nil {
		preparer = autorest.DecoratePreparer(preparer,
			autorest.WithJSON(VMInstanceIDs))
	}
	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 VirtualMachineScaleSetsClient) RestartSender(req *http.Request) (future VirtualMachineScaleSetsRestartFuture, err error) {
	var resp *http.Response
	resp, err = autorest.SendWithSender(client, 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 VirtualMachineScaleSetsClient) RestartResponder(resp *http.Response) (result autorest.Response, err error) {
	err = autorest.Respond(
		resp,
		client.ByInspecting(),
		azure.WithErrorUnlessStatusCode(http.StatusOK, http.StatusAccepted),
		autorest.ByClosing())
	result.Response = resp
	return
}

// Start starts one or more virtual machines in a VM scale set.
// Parameters:
// resourceGroupName - the name of the resource group.
// VMScaleSetName - the name of the VM scale set.
// VMInstanceIDs - a list of virtual machine instance IDs from the VM scale set.
func (client VirtualMachineScaleSetsClient) Start(ctx context.Context, resourceGroupName string, VMScaleSetName string, VMInstanceIDs *VirtualMachineScaleSetVMInstanceIDs) (result VirtualMachineScaleSetsStartFuture, err error) {
	if tracing.IsEnabled() {
		ctx = tracing.StartSpan(ctx, fqdn+"/VirtualMachineScaleSetsClient.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, VMInstanceIDs)
	if err != nil {
		err = autorest.NewErrorWithError(err, "compute.VirtualMachineScaleSetsClient", "Start", nil, "Failure preparing request")
		return
	}

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

	return
}

// StartPreparer prepares the Start request.
func (client VirtualMachineScaleSetsClient) StartPreparer(ctx context.Context, resourceGroupName string, VMScaleSetName string, VMInstanceIDs *VirtualMachineScaleSetVMInstanceIDs) (*http.Request, error) {
	pathParameters := map[string]interface{}{
		"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}/start", pathParameters),
		autorest.WithQueryParameters(queryParameters))
	if VMInstanceIDs != nil {
		preparer = autorest.DecoratePreparer(preparer,
			autorest.WithJSON(VMInstanceIDs))
	}
	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 VirtualMachineScaleSetsClient) StartSender(req *http.Request) (future VirtualMachineScaleSetsStartFuture, err error) {
	var resp *http.Response
	resp, err = autorest.SendWithSender(client, 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 VirtualMachineScaleSetsClient) StartResponder(resp *http.Response) (result autorest.Response, err error) {
	err = autorest.Respond(
		resp,
		client.ByInspecting(),
		azure.WithErrorUnlessStatusCode(http.StatusOK, http.StatusAccepted),
		autorest.ByClosing())
	result.Response = resp
	return
}

// Update update a VM scale set.
// Parameters:
// resourceGroupName - the name of the resource group.
// VMScaleSetName - the name of the VM scale set to create or update.
// parameters - the scale set object.
func (client VirtualMachineScaleSetsClient) Update(ctx context.Context, resourceGroupName string, VMScaleSetName string, parameters VirtualMachineScaleSetUpdate) (result VirtualMachineScaleSetsUpdateFuture, err error) {
	if tracing.IsEnabled() {
		ctx = tracing.StartSpan(ctx, fqdn+"/VirtualMachineScaleSetsClient.Update")
		defer func() {
			sc := -1
			if result.Response() != nil {
				sc = result.Response().StatusCode
			}
			tracing.EndSpan(ctx, sc, err)
		}()
	}
	req, err := client.UpdatePreparer(ctx, resourceGroupName, VMScaleSetName, parameters)
	if err != nil {
		err = autorest.NewErrorWithError(err, "compute.VirtualMachineScaleSetsClient", "Update", nil, "Failure preparing request")
		return
	}

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

	return
}

// UpdatePreparer prepares the Update request.
func (client VirtualMachineScaleSetsClient) UpdatePreparer(ctx context.Context, resourceGroupName string, VMScaleSetName string, parameters VirtualMachineScaleSetUpdate) (*http.Request, error) {
	pathParameters := map[string]interface{}{
		"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.AsPatch(),
		autorest.WithBaseURL(client.BaseURI),
		autorest.WithPathParameters("/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.Compute/virtualMachineScaleSets/{vmScaleSetName}", 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 VirtualMachineScaleSetsClient) UpdateSender(req *http.Request) (future VirtualMachineScaleSetsUpdateFuture, err error) {
	var resp *http.Response
	resp, err = autorest.SendWithSender(client, 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 VirtualMachineScaleSetsClient) UpdateResponder(resp *http.Response) (result VirtualMachineScaleSet, err error) {
	err = autorest.Respond(
		resp,
		client.ByInspecting(),
		azure.WithErrorUnlessStatusCode(http.StatusOK),
		autorest.ByUnmarshallingJSON(&result),
		autorest.ByClosing())
	result.Response = autorest.Response{Response: resp}
	return
}

// UpdateInstances upgrades one or more virtual machines to the latest SKU set in the VM scale set model.
// Parameters:
// resourceGroupName - the name of the resource group.
// VMScaleSetName - the name of the VM scale set.
// VMInstanceIDs - a list of virtual machine instance IDs from the VM scale set.
func (client VirtualMachineScaleSetsClient) UpdateInstances(ctx context.Context, resourceGroupName string, VMScaleSetName string, VMInstanceIDs VirtualMachineScaleSetVMInstanceRequiredIDs) (result VirtualMachineScaleSetsUpdateInstancesFuture, err error) {
	if tracing.IsEnabled() {
		ctx = tracing.StartSpan(ctx, fqdn+"/VirtualMachineScaleSetsClient.UpdateInstances")
		defer func() {
			sc := -1
			if result.Response() != nil {
				sc = result.Response().StatusCode
			}
			tracing.EndSpan(ctx, sc, err)
		}()
	}
	if err := validation.Validate([]validation.Validation{
		{TargetValue: VMInstanceIDs,
			Constraints: []validation.Constraint{{Target: "VMInstanceIDs.InstanceIds", Name: validation.Null, Rule: true, Chain: nil}}}}); err != nil {
		return result, validation.NewError("compute.VirtualMachineScaleSetsClient", "UpdateInstances", err.Error())
	}

	req, err := client.UpdateInstancesPreparer(ctx, resourceGroupName, VMScaleSetName, VMInstanceIDs)
	if err != nil {
		err = autorest.NewErrorWithError(err, "compute.VirtualMachineScaleSetsClient", "UpdateInstances", nil, "Failure preparing request")
		return
	}

	result, err = client.UpdateInstancesSender(req)
	if err != nil {
		err = autorest.NewErrorWithError(err, "compute.VirtualMachineScaleSetsClient", "UpdateInstances", result.Response(), "Failure sending request")
		return
	}

	return
}

// UpdateInstancesPreparer prepares the UpdateInstances request.
func (client VirtualMachineScaleSetsClient) UpdateInstancesPreparer(ctx context.Context, resourceGroupName string, VMScaleSetName string, VMInstanceIDs VirtualMachineScaleSetVMInstanceRequiredIDs) (*http.Request, error) {
	pathParameters := map[string]interface{}{
		"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}/manualupgrade", pathParameters),
		autorest.WithJSON(VMInstanceIDs),
		autorest.WithQueryParameters(queryParameters))
	return preparer.Prepare((&http.Request{}).WithContext(ctx))
}

// UpdateInstancesSender sends the UpdateInstances request. The method will close the
// http.Response Body if it receives an error.
func (client VirtualMachineScaleSetsClient) UpdateInstancesSender(req *http.Request) (future VirtualMachineScaleSetsUpdateInstancesFuture, err error) {
	var resp *http.Response
	resp, err = autorest.SendWithSender(client, req,
		azure.DoRetryWithRegistration(client.Client))
	if err != nil {
		return
	}
	future.Future, err = azure.NewFutureFromResponse(resp)
	return
}

// UpdateInstancesResponder handles the response to the UpdateInstances request. The method always
// closes the http.Response Body.
func (client VirtualMachineScaleSetsClient) UpdateInstancesResponder(resp *http.Response) (result autorest.Response, err error) {
	err = autorest.Respond(
		resp,
		client.ByInspecting(),
		azure.WithErrorUnlessStatusCode(http.StatusOK, http.StatusAccepted),
		autorest.ByClosing())
	result.Response = resp
	return
}