package digitaltwins

// 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"
)

// Client is the azure Digital Twins Client for managing DigitalTwinsInstance
type Client struct {
	BaseClient
}

// NewClient creates an instance of the Client client.
func NewClient(subscriptionID string) Client {
	return NewClientWithBaseURI(DefaultBaseURI, subscriptionID)
}

// NewClientWithBaseURI creates an instance of the Client 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 NewClientWithBaseURI(baseURI string, subscriptionID string) Client {
	return Client{NewWithBaseURI(baseURI, subscriptionID)}
}

// CheckNameAvailability check if a DigitalTwinsInstance name is available.
// Parameters:
// location - location of DigitalTwinsInstance.
// digitalTwinsInstanceCheckName - set the name parameter in the DigitalTwinsInstanceCheckName structure to the
// name of the DigitalTwinsInstance to check.
func (client Client) CheckNameAvailability(ctx context.Context, location string, digitalTwinsInstanceCheckName CheckNameRequest) (result CheckNameResult, err error) {
	if tracing.IsEnabled() {
		ctx = tracing.StartSpan(ctx, fqdn+"/Client.CheckNameAvailability")
		defer func() {
			sc := -1
			if result.Response.Response != nil {
				sc = result.Response.Response.StatusCode
			}
			tracing.EndSpan(ctx, sc, err)
		}()
	}
	if err := validation.Validate([]validation.Validation{
		{TargetValue: location,
			Constraints: []validation.Constraint{{Target: "location", Name: validation.MinLength, Rule: 3, Chain: nil}}},
		{TargetValue: digitalTwinsInstanceCheckName,
			Constraints: []validation.Constraint{{Target: "digitalTwinsInstanceCheckName.Name", Name: validation.Null, Rule: true, Chain: nil},
				{Target: "digitalTwinsInstanceCheckName.Type", Name: validation.Null, Rule: true, Chain: nil}}}}); err != nil {
		return result, validation.NewError("digitaltwins.Client", "CheckNameAvailability", err.Error())
	}

	req, err := client.CheckNameAvailabilityPreparer(ctx, location, digitalTwinsInstanceCheckName)
	if err != nil {
		err = autorest.NewErrorWithError(err, "digitaltwins.Client", "CheckNameAvailability", nil, "Failure preparing request")
		return
	}

	resp, err := client.CheckNameAvailabilitySender(req)
	if err != nil {
		result.Response = autorest.Response{Response: resp}
		err = autorest.NewErrorWithError(err, "digitaltwins.Client", "CheckNameAvailability", resp, "Failure sending request")
		return
	}

	result, err = client.CheckNameAvailabilityResponder(resp)
	if err != nil {
		err = autorest.NewErrorWithError(err, "digitaltwins.Client", "CheckNameAvailability", resp, "Failure responding to request")
		return
	}

	return
}

// CheckNameAvailabilityPreparer prepares the CheckNameAvailability request.
func (client Client) CheckNameAvailabilityPreparer(ctx context.Context, location string, digitalTwinsInstanceCheckName CheckNameRequest) (*http.Request, error) {
	pathParameters := map[string]interface{}{
		"location":       autorest.Encode("path", location),
		"subscriptionId": autorest.Encode("path", client.SubscriptionID),
	}

	const APIVersion = "2020-10-31"
	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}/providers/Microsoft.DigitalTwins/locations/{location}/checkNameAvailability", pathParameters),
		autorest.WithJSON(digitalTwinsInstanceCheckName),
		autorest.WithQueryParameters(queryParameters))
	return preparer.Prepare((&http.Request{}).WithContext(ctx))
}

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

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

// CreateOrUpdate create or update the metadata of a DigitalTwinsInstance. The usual pattern to modify a property is to
// retrieve the DigitalTwinsInstance and security metadata, and then combine them with the modified values in a new
// body to update the DigitalTwinsInstance.
// Parameters:
// resourceGroupName - the name of the resource group that contains the DigitalTwinsInstance.
// resourceName - the name of the DigitalTwinsInstance.
// digitalTwinsCreate - the DigitalTwinsInstance and security metadata.
func (client Client) CreateOrUpdate(ctx context.Context, resourceGroupName string, resourceName string, digitalTwinsCreate Description) (result CreateOrUpdateFuture, err error) {
	if tracing.IsEnabled() {
		ctx = tracing.StartSpan(ctx, fqdn+"/Client.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: resourceGroupName,
			Constraints: []validation.Constraint{{Target: "resourceGroupName", Name: validation.MaxLength, Rule: 64, Chain: nil},
				{Target: "resourceGroupName", Name: validation.MinLength, Rule: 1, Chain: nil}}},
		{TargetValue: resourceName,
			Constraints: []validation.Constraint{{Target: "resourceName", Name: validation.MaxLength, Rule: 63, Chain: nil},
				{Target: "resourceName", Name: validation.MinLength, Rule: 3, Chain: nil}}}}); err != nil {
		return result, validation.NewError("digitaltwins.Client", "CreateOrUpdate", err.Error())
	}

	req, err := client.CreateOrUpdatePreparer(ctx, resourceGroupName, resourceName, digitalTwinsCreate)
	if err != nil {
		err = autorest.NewErrorWithError(err, "digitaltwins.Client", "CreateOrUpdate", nil, "Failure preparing request")
		return
	}

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

	return
}

// CreateOrUpdatePreparer prepares the CreateOrUpdate request.
func (client Client) CreateOrUpdatePreparer(ctx context.Context, resourceGroupName string, resourceName string, digitalTwinsCreate Description) (*http.Request, error) {
	pathParameters := map[string]interface{}{
		"resourceGroupName": autorest.Encode("path", resourceGroupName),
		"resourceName":      autorest.Encode("path", resourceName),
		"subscriptionId":    autorest.Encode("path", client.SubscriptionID),
	}

	const APIVersion = "2020-10-31"
	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.DigitalTwins/digitalTwinsInstances/{resourceName}", pathParameters),
		autorest.WithJSON(digitalTwinsCreate),
		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 Client) CreateOrUpdateSender(req *http.Request) (future CreateOrUpdateFuture, 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 = func(client Client) (d Description, err error) {
		var done bool
		done, err = future.DoneWithContext(context.Background(), client)
		if err != nil {
			err = autorest.NewErrorWithError(err, "digitaltwins.CreateOrUpdateFuture", "Result", future.Response(), "Polling failure")
			return
		}
		if !done {
			err = azure.NewAsyncOpIncompleteError("digitaltwins.CreateOrUpdateFuture")
			return
		}
		sender := autorest.DecorateSender(client, autorest.DoRetryForStatusCodes(client.RetryAttempts, client.RetryDuration, autorest.StatusCodesForRetry...))
		if d.Response.Response, err = future.GetResult(sender); err == nil && d.Response.Response.StatusCode != http.StatusNoContent {
			d, err = client.CreateOrUpdateResponder(d.Response.Response)
			if err != nil {
				err = autorest.NewErrorWithError(err, "digitaltwins.CreateOrUpdateFuture", "Result", d.Response.Response, "Failure responding to request")
			}
		}
		return
	}
	return
}

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

// Delete delete a DigitalTwinsInstance.
// Parameters:
// resourceGroupName - the name of the resource group that contains the DigitalTwinsInstance.
// resourceName - the name of the DigitalTwinsInstance.
func (client Client) Delete(ctx context.Context, resourceGroupName string, resourceName string) (result DeleteFuture, err error) {
	if tracing.IsEnabled() {
		ctx = tracing.StartSpan(ctx, fqdn+"/Client.Delete")
		defer func() {
			sc := -1
			if result.Response() != nil {
				sc = result.Response().StatusCode
			}
			tracing.EndSpan(ctx, sc, err)
		}()
	}
	if err := validation.Validate([]validation.Validation{
		{TargetValue: resourceGroupName,
			Constraints: []validation.Constraint{{Target: "resourceGroupName", Name: validation.MaxLength, Rule: 64, Chain: nil},
				{Target: "resourceGroupName", Name: validation.MinLength, Rule: 1, Chain: nil}}},
		{TargetValue: resourceName,
			Constraints: []validation.Constraint{{Target: "resourceName", Name: validation.MaxLength, Rule: 63, Chain: nil},
				{Target: "resourceName", Name: validation.MinLength, Rule: 3, Chain: nil}}}}); err != nil {
		return result, validation.NewError("digitaltwins.Client", "Delete", err.Error())
	}

	req, err := client.DeletePreparer(ctx, resourceGroupName, resourceName)
	if err != nil {
		err = autorest.NewErrorWithError(err, "digitaltwins.Client", "Delete", nil, "Failure preparing request")
		return
	}

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

	return
}

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

	const APIVersion = "2020-10-31"
	queryParameters := map[string]interface{}{
		"api-version": APIVersion,
	}

	preparer := autorest.CreatePreparer(
		autorest.AsDelete(),
		autorest.WithBaseURL(client.BaseURI),
		autorest.WithPathParameters("/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.DigitalTwins/digitalTwinsInstances/{resourceName}", 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 Client) DeleteSender(req *http.Request) (future DeleteFuture, 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 = func(client Client) (d Description, err error) {
		var done bool
		done, err = future.DoneWithContext(context.Background(), client)
		if err != nil {
			err = autorest.NewErrorWithError(err, "digitaltwins.DeleteFuture", "Result", future.Response(), "Polling failure")
			return
		}
		if !done {
			err = azure.NewAsyncOpIncompleteError("digitaltwins.DeleteFuture")
			return
		}
		sender := autorest.DecorateSender(client, autorest.DoRetryForStatusCodes(client.RetryAttempts, client.RetryDuration, autorest.StatusCodesForRetry...))
		if d.Response.Response, err = future.GetResult(sender); err == nil && d.Response.Response.StatusCode != http.StatusNoContent {
			d, err = client.DeleteResponder(d.Response.Response)
			if err != nil {
				err = autorest.NewErrorWithError(err, "digitaltwins.DeleteFuture", "Result", d.Response.Response, "Failure responding to request")
			}
		}
		return
	}
	return
}

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

// Get get DigitalTwinsInstances resource.
// Parameters:
// resourceGroupName - the name of the resource group that contains the DigitalTwinsInstance.
// resourceName - the name of the DigitalTwinsInstance.
func (client Client) Get(ctx context.Context, resourceGroupName string, resourceName string) (result Description, err error) {
	if tracing.IsEnabled() {
		ctx = tracing.StartSpan(ctx, fqdn+"/Client.Get")
		defer func() {
			sc := -1
			if result.Response.Response != nil {
				sc = result.Response.Response.StatusCode
			}
			tracing.EndSpan(ctx, sc, err)
		}()
	}
	if err := validation.Validate([]validation.Validation{
		{TargetValue: resourceGroupName,
			Constraints: []validation.Constraint{{Target: "resourceGroupName", Name: validation.MaxLength, Rule: 64, Chain: nil},
				{Target: "resourceGroupName", Name: validation.MinLength, Rule: 1, Chain: nil}}},
		{TargetValue: resourceName,
			Constraints: []validation.Constraint{{Target: "resourceName", Name: validation.MaxLength, Rule: 63, Chain: nil},
				{Target: "resourceName", Name: validation.MinLength, Rule: 3, Chain: nil}}}}); err != nil {
		return result, validation.NewError("digitaltwins.Client", "Get", err.Error())
	}

	req, err := client.GetPreparer(ctx, resourceGroupName, resourceName)
	if err != nil {
		err = autorest.NewErrorWithError(err, "digitaltwins.Client", "Get", nil, "Failure preparing request")
		return
	}

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

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

	return
}

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

	const APIVersion = "2020-10-31"
	queryParameters := map[string]interface{}{
		"api-version": APIVersion,
	}

	preparer := autorest.CreatePreparer(
		autorest.AsGet(),
		autorest.WithBaseURL(client.BaseURI),
		autorest.WithPathParameters("/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.DigitalTwins/digitalTwinsInstances/{resourceName}", 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 Client) 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 Client) GetResponder(resp *http.Response) (result Description, err error) {
	err = autorest.Respond(
		resp,
		azure.WithErrorUnlessStatusCode(http.StatusOK),
		autorest.ByUnmarshallingJSON(&result),
		autorest.ByClosing())
	result.Response = autorest.Response{Response: resp}
	return
}

// List get all the DigitalTwinsInstances in a subscription.
func (client Client) List(ctx context.Context) (result DescriptionListResultPage, err error) {
	if tracing.IsEnabled() {
		ctx = tracing.StartSpan(ctx, fqdn+"/Client.List")
		defer func() {
			sc := -1
			if result.dlr.Response.Response != nil {
				sc = result.dlr.Response.Response.StatusCode
			}
			tracing.EndSpan(ctx, sc, err)
		}()
	}
	result.fn = client.listNextResults
	req, err := client.ListPreparer(ctx)
	if err != nil {
		err = autorest.NewErrorWithError(err, "digitaltwins.Client", "List", nil, "Failure preparing request")
		return
	}

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

	result.dlr, err = client.ListResponder(resp)
	if err != nil {
		err = autorest.NewErrorWithError(err, "digitaltwins.Client", "List", resp, "Failure responding to request")
		return
	}
	if result.dlr.hasNextLink() && result.dlr.IsEmpty() {
		err = result.NextWithContext(ctx)
		return
	}

	return
}

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

	const APIVersion = "2020-10-31"
	queryParameters := map[string]interface{}{
		"api-version": APIVersion,
	}

	preparer := autorest.CreatePreparer(
		autorest.AsGet(),
		autorest.WithBaseURL(client.BaseURI),
		autorest.WithPathParameters("/subscriptions/{subscriptionId}/providers/Microsoft.DigitalTwins/digitalTwinsInstances", 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 Client) 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 Client) ListResponder(resp *http.Response) (result DescriptionListResult, 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 Client) listNextResults(ctx context.Context, lastResults DescriptionListResult) (result DescriptionListResult, err error) {
	req, err := lastResults.descriptionListResultPreparer(ctx)
	if err != nil {
		return result, autorest.NewErrorWithError(err, "digitaltwins.Client", "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, "digitaltwins.Client", "listNextResults", resp, "Failure sending next results request")
	}
	result, err = client.ListResponder(resp)
	if err != nil {
		err = autorest.NewErrorWithError(err, "digitaltwins.Client", "listNextResults", resp, "Failure responding to next results request")
	}
	return
}

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

// ListByResourceGroup get all the DigitalTwinsInstances in a resource group.
// Parameters:
// resourceGroupName - the name of the resource group that contains the DigitalTwinsInstance.
func (client Client) ListByResourceGroup(ctx context.Context, resourceGroupName string) (result DescriptionListResultPage, err error) {
	if tracing.IsEnabled() {
		ctx = tracing.StartSpan(ctx, fqdn+"/Client.ListByResourceGroup")
		defer func() {
			sc := -1
			if result.dlr.Response.Response != nil {
				sc = result.dlr.Response.Response.StatusCode
			}
			tracing.EndSpan(ctx, sc, err)
		}()
	}
	if err := validation.Validate([]validation.Validation{
		{TargetValue: resourceGroupName,
			Constraints: []validation.Constraint{{Target: "resourceGroupName", Name: validation.MaxLength, Rule: 64, Chain: nil},
				{Target: "resourceGroupName", Name: validation.MinLength, Rule: 1, Chain: nil}}}}); err != nil {
		return result, validation.NewError("digitaltwins.Client", "ListByResourceGroup", err.Error())
	}

	result.fn = client.listByResourceGroupNextResults
	req, err := client.ListByResourceGroupPreparer(ctx, resourceGroupName)
	if err != nil {
		err = autorest.NewErrorWithError(err, "digitaltwins.Client", "ListByResourceGroup", nil, "Failure preparing request")
		return
	}

	resp, err := client.ListByResourceGroupSender(req)
	if err != nil {
		result.dlr.Response = autorest.Response{Response: resp}
		err = autorest.NewErrorWithError(err, "digitaltwins.Client", "ListByResourceGroup", resp, "Failure sending request")
		return
	}

	result.dlr, err = client.ListByResourceGroupResponder(resp)
	if err != nil {
		err = autorest.NewErrorWithError(err, "digitaltwins.Client", "ListByResourceGroup", resp, "Failure responding to request")
		return
	}
	if result.dlr.hasNextLink() && result.dlr.IsEmpty() {
		err = result.NextWithContext(ctx)
		return
	}

	return
}

// ListByResourceGroupPreparer prepares the ListByResourceGroup request.
func (client Client) ListByResourceGroupPreparer(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 = "2020-10-31"
	queryParameters := map[string]interface{}{
		"api-version": APIVersion,
	}

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

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

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

// listByResourceGroupNextResults retrieves the next set of results, if any.
func (client Client) listByResourceGroupNextResults(ctx context.Context, lastResults DescriptionListResult) (result DescriptionListResult, err error) {
	req, err := lastResults.descriptionListResultPreparer(ctx)
	if err != nil {
		return result, autorest.NewErrorWithError(err, "digitaltwins.Client", "listByResourceGroupNextResults", nil, "Failure preparing next results request")
	}
	if req == nil {
		return
	}
	resp, err := client.ListByResourceGroupSender(req)
	if err != nil {
		result.Response = autorest.Response{Response: resp}
		return result, autorest.NewErrorWithError(err, "digitaltwins.Client", "listByResourceGroupNextResults", resp, "Failure sending next results request")
	}
	result, err = client.ListByResourceGroupResponder(resp)
	if err != nil {
		err = autorest.NewErrorWithError(err, "digitaltwins.Client", "listByResourceGroupNextResults", resp, "Failure responding to next results request")
	}
	return
}

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

// Update update metadata of DigitalTwinsInstance.
// Parameters:
// resourceGroupName - the name of the resource group that contains the DigitalTwinsInstance.
// resourceName - the name of the DigitalTwinsInstance.
// digitalTwinsPatchDescription - the DigitalTwinsInstance and security metadata.
func (client Client) Update(ctx context.Context, resourceGroupName string, resourceName string, digitalTwinsPatchDescription PatchDescription) (result Description, err error) {
	if tracing.IsEnabled() {
		ctx = tracing.StartSpan(ctx, fqdn+"/Client.Update")
		defer func() {
			sc := -1
			if result.Response.Response != nil {
				sc = result.Response.Response.StatusCode
			}
			tracing.EndSpan(ctx, sc, err)
		}()
	}
	if err := validation.Validate([]validation.Validation{
		{TargetValue: resourceGroupName,
			Constraints: []validation.Constraint{{Target: "resourceGroupName", Name: validation.MaxLength, Rule: 64, Chain: nil},
				{Target: "resourceGroupName", Name: validation.MinLength, Rule: 1, Chain: nil}}},
		{TargetValue: resourceName,
			Constraints: []validation.Constraint{{Target: "resourceName", Name: validation.MaxLength, Rule: 63, Chain: nil},
				{Target: "resourceName", Name: validation.MinLength, Rule: 3, Chain: nil}}}}); err != nil {
		return result, validation.NewError("digitaltwins.Client", "Update", err.Error())
	}

	req, err := client.UpdatePreparer(ctx, resourceGroupName, resourceName, digitalTwinsPatchDescription)
	if err != nil {
		err = autorest.NewErrorWithError(err, "digitaltwins.Client", "Update", nil, "Failure preparing request")
		return
	}

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

	result, err = client.UpdateResponder(resp)
	if err != nil {
		err = autorest.NewErrorWithError(err, "digitaltwins.Client", "Update", resp, "Failure responding to request")
		return
	}

	return
}

// UpdatePreparer prepares the Update request.
func (client Client) UpdatePreparer(ctx context.Context, resourceGroupName string, resourceName string, digitalTwinsPatchDescription PatchDescription) (*http.Request, error) {
	pathParameters := map[string]interface{}{
		"resourceGroupName": autorest.Encode("path", resourceGroupName),
		"resourceName":      autorest.Encode("path", resourceName),
		"subscriptionId":    autorest.Encode("path", client.SubscriptionID),
	}

	const APIVersion = "2020-10-31"
	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.DigitalTwins/digitalTwinsInstances/{resourceName}", pathParameters),
		autorest.WithJSON(digitalTwinsPatchDescription),
		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 Client) UpdateSender(req *http.Request) (*http.Response, error) {
	return client.Send(req, azure.DoRetryWithRegistration(client.Client))
}

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