package eventgrid

// 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"
)

// TopicsClient is the azure EventGrid Management Client
type TopicsClient struct {
	BaseClient
}

// NewTopicsClient creates an instance of the TopicsClient client.
func NewTopicsClient(subscriptionID string) TopicsClient {
	return NewTopicsClientWithBaseURI(DefaultBaseURI, subscriptionID)
}

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

// CreateOrUpdate asynchronously creates a new topic with the specified parameters.
// Parameters:
// resourceGroupName - the name of the resource group within the user's subscription.
// topicName - name of the topic
// topicInfo - topic information
func (client TopicsClient) CreateOrUpdate(ctx context.Context, resourceGroupName string, topicName string, topicInfo Topic) (result TopicsCreateOrUpdateFuture, err error) {
	if tracing.IsEnabled() {
		ctx = tracing.StartSpan(ctx, fqdn+"/TopicsClient.CreateOrUpdate")
		defer func() {
			sc := -1
			if result.FutureAPI != nil && result.FutureAPI.Response() != nil {
				sc = result.FutureAPI.Response().StatusCode
			}
			tracing.EndSpan(ctx, sc, err)
		}()
	}
	req, err := client.CreateOrUpdatePreparer(ctx, resourceGroupName, topicName, topicInfo)
	if err != nil {
		err = autorest.NewErrorWithError(err, "eventgrid.TopicsClient", "CreateOrUpdate", nil, "Failure preparing request")
		return
	}

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

	return
}

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

	const APIVersion = "2017-09-15-preview"
	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.EventGrid/topics/{topicName}", pathParameters),
		autorest.WithJSON(topicInfo),
		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 TopicsClient) CreateOrUpdateSender(req *http.Request) (future TopicsCreateOrUpdateFuture, 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 TopicsClient) (t Topic, err error) {
		var done bool
		done, err = future.DoneWithContext(context.Background(), client)
		if err != nil {
			err = autorest.NewErrorWithError(err, "eventgrid.TopicsCreateOrUpdateFuture", "Result", future.Response(), "Polling failure")
			return
		}
		if !done {
			err = azure.NewAsyncOpIncompleteError("eventgrid.TopicsCreateOrUpdateFuture")
			return
		}
		sender := autorest.DecorateSender(client, autorest.DoRetryForStatusCodes(client.RetryAttempts, client.RetryDuration, autorest.StatusCodesForRetry...))
		t.Response.Response, err = future.GetResult(sender)
		if t.Response.Response == nil && err == nil {
			err = autorest.NewErrorWithError(err, "eventgrid.TopicsCreateOrUpdateFuture", "Result", nil, "received nil response and error")
		}
		if err == nil && t.Response.Response.StatusCode != http.StatusNoContent {
			t, err = client.CreateOrUpdateResponder(t.Response.Response)
			if err != nil {
				err = autorest.NewErrorWithError(err, "eventgrid.TopicsCreateOrUpdateFuture", "Result", t.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 TopicsClient) CreateOrUpdateResponder(resp *http.Response) (result Topic, 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 existing topic
// Parameters:
// resourceGroupName - the name of the resource group within the user's subscription.
// topicName - name of the topic
func (client TopicsClient) Delete(ctx context.Context, resourceGroupName string, topicName string) (result TopicsDeleteFuture, err error) {
	if tracing.IsEnabled() {
		ctx = tracing.StartSpan(ctx, fqdn+"/TopicsClient.Delete")
		defer func() {
			sc := -1
			if result.FutureAPI != nil && result.FutureAPI.Response() != nil {
				sc = result.FutureAPI.Response().StatusCode
			}
			tracing.EndSpan(ctx, sc, err)
		}()
	}
	req, err := client.DeletePreparer(ctx, resourceGroupName, topicName)
	if err != nil {
		err = autorest.NewErrorWithError(err, "eventgrid.TopicsClient", "Delete", nil, "Failure preparing request")
		return
	}

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

	return
}

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

	const APIVersion = "2017-09-15-preview"
	queryParameters := map[string]interface{}{
		"api-version": APIVersion,
	}

	preparer := autorest.CreatePreparer(
		autorest.AsDelete(),
		autorest.WithBaseURL(client.BaseURI),
		autorest.WithPathParameters("/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.EventGrid/topics/{topicName}", 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 TopicsClient) DeleteSender(req *http.Request) (future TopicsDeleteFuture, 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 TopicsClient) (ar autorest.Response, err error) {
		var done bool
		done, err = future.DoneWithContext(context.Background(), client)
		if err != nil {
			err = autorest.NewErrorWithError(err, "eventgrid.TopicsDeleteFuture", "Result", future.Response(), "Polling failure")
			return
		}
		if !done {
			err = azure.NewAsyncOpIncompleteError("eventgrid.TopicsDeleteFuture")
			return
		}
		ar.Response = future.Response()
		return
	}
	return
}

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

// Get get properties of a topic
// Parameters:
// resourceGroupName - the name of the resource group within the user's subscription.
// topicName - name of the topic
func (client TopicsClient) Get(ctx context.Context, resourceGroupName string, topicName string) (result Topic, err error) {
	if tracing.IsEnabled() {
		ctx = tracing.StartSpan(ctx, fqdn+"/TopicsClient.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, topicName)
	if err != nil {
		err = autorest.NewErrorWithError(err, "eventgrid.TopicsClient", "Get", nil, "Failure preparing request")
		return
	}

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

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

	return
}

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

	const APIVersion = "2017-09-15-preview"
	queryParameters := map[string]interface{}{
		"api-version": APIVersion,
	}

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

// ListByResourceGroup list all the topics under a resource group
// Parameters:
// resourceGroupName - the name of the resource group within the user's subscription.
func (client TopicsClient) ListByResourceGroup(ctx context.Context, resourceGroupName string) (result TopicsListResult, err error) {
	if tracing.IsEnabled() {
		ctx = tracing.StartSpan(ctx, fqdn+"/TopicsClient.ListByResourceGroup")
		defer func() {
			sc := -1
			if result.Response.Response != nil {
				sc = result.Response.Response.StatusCode
			}
			tracing.EndSpan(ctx, sc, err)
		}()
	}
	req, err := client.ListByResourceGroupPreparer(ctx, resourceGroupName)
	if err != nil {
		err = autorest.NewErrorWithError(err, "eventgrid.TopicsClient", "ListByResourceGroup", nil, "Failure preparing request")
		return
	}

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

	result, err = client.ListByResourceGroupResponder(resp)
	if err != nil {
		err = autorest.NewErrorWithError(err, "eventgrid.TopicsClient", "ListByResourceGroup", resp, "Failure responding to request")
		return
	}

	return
}

// ListByResourceGroupPreparer prepares the ListByResourceGroup request.
func (client TopicsClient) 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 = "2017-09-15-preview"
	queryParameters := map[string]interface{}{
		"api-version": APIVersion,
	}

	preparer := autorest.CreatePreparer(
		autorest.AsGet(),
		autorest.WithBaseURL(client.BaseURI),
		autorest.WithPathParameters("/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.EventGrid/topics", 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 TopicsClient) 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 TopicsClient) ListByResourceGroupResponder(resp *http.Response) (result TopicsListResult, err error) {
	err = autorest.Respond(
		resp,
		azure.WithErrorUnlessStatusCode(http.StatusOK),
		autorest.ByUnmarshallingJSON(&result),
		autorest.ByClosing())
	result.Response = autorest.Response{Response: resp}
	return
}

// ListBySubscription list all the topics under an Azure subscription
func (client TopicsClient) ListBySubscription(ctx context.Context) (result TopicsListResult, err error) {
	if tracing.IsEnabled() {
		ctx = tracing.StartSpan(ctx, fqdn+"/TopicsClient.ListBySubscription")
		defer func() {
			sc := -1
			if result.Response.Response != nil {
				sc = result.Response.Response.StatusCode
			}
			tracing.EndSpan(ctx, sc, err)
		}()
	}
	req, err := client.ListBySubscriptionPreparer(ctx)
	if err != nil {
		err = autorest.NewErrorWithError(err, "eventgrid.TopicsClient", "ListBySubscription", nil, "Failure preparing request")
		return
	}

	resp, err := client.ListBySubscriptionSender(req)
	if err != nil {
		result.Response = autorest.Response{Response: resp}
		err = autorest.NewErrorWithError(err, "eventgrid.TopicsClient", "ListBySubscription", resp, "Failure sending request")
		return
	}

	result, err = client.ListBySubscriptionResponder(resp)
	if err != nil {
		err = autorest.NewErrorWithError(err, "eventgrid.TopicsClient", "ListBySubscription", resp, "Failure responding to request")
		return
	}

	return
}

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

	const APIVersion = "2017-09-15-preview"
	queryParameters := map[string]interface{}{
		"api-version": APIVersion,
	}

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

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

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

// ListEventTypes list event types for a topic
// Parameters:
// resourceGroupName - the name of the resource group within the user's subscription.
// providerNamespace - namespace of the provider of the topic
// resourceTypeName - name of the topic type
// resourceName - name of the topic
func (client TopicsClient) ListEventTypes(ctx context.Context, resourceGroupName string, providerNamespace string, resourceTypeName string, resourceName string) (result EventTypesListResult, err error) {
	if tracing.IsEnabled() {
		ctx = tracing.StartSpan(ctx, fqdn+"/TopicsClient.ListEventTypes")
		defer func() {
			sc := -1
			if result.Response.Response != nil {
				sc = result.Response.Response.StatusCode
			}
			tracing.EndSpan(ctx, sc, err)
		}()
	}
	req, err := client.ListEventTypesPreparer(ctx, resourceGroupName, providerNamespace, resourceTypeName, resourceName)
	if err != nil {
		err = autorest.NewErrorWithError(err, "eventgrid.TopicsClient", "ListEventTypes", nil, "Failure preparing request")
		return
	}

	resp, err := client.ListEventTypesSender(req)
	if err != nil {
		result.Response = autorest.Response{Response: resp}
		err = autorest.NewErrorWithError(err, "eventgrid.TopicsClient", "ListEventTypes", resp, "Failure sending request")
		return
	}

	result, err = client.ListEventTypesResponder(resp)
	if err != nil {
		err = autorest.NewErrorWithError(err, "eventgrid.TopicsClient", "ListEventTypes", resp, "Failure responding to request")
		return
	}

	return
}

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

	const APIVersion = "2017-09-15-preview"
	queryParameters := map[string]interface{}{
		"api-version": APIVersion,
	}

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

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

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

// ListSharedAccessKeys list the two keys used to publish to a topic
// Parameters:
// resourceGroupName - the name of the resource group within the user's subscription.
// topicName - name of the topic
func (client TopicsClient) ListSharedAccessKeys(ctx context.Context, resourceGroupName string, topicName string) (result TopicSharedAccessKeys, err error) {
	if tracing.IsEnabled() {
		ctx = tracing.StartSpan(ctx, fqdn+"/TopicsClient.ListSharedAccessKeys")
		defer func() {
			sc := -1
			if result.Response.Response != nil {
				sc = result.Response.Response.StatusCode
			}
			tracing.EndSpan(ctx, sc, err)
		}()
	}
	req, err := client.ListSharedAccessKeysPreparer(ctx, resourceGroupName, topicName)
	if err != nil {
		err = autorest.NewErrorWithError(err, "eventgrid.TopicsClient", "ListSharedAccessKeys", nil, "Failure preparing request")
		return
	}

	resp, err := client.ListSharedAccessKeysSender(req)
	if err != nil {
		result.Response = autorest.Response{Response: resp}
		err = autorest.NewErrorWithError(err, "eventgrid.TopicsClient", "ListSharedAccessKeys", resp, "Failure sending request")
		return
	}

	result, err = client.ListSharedAccessKeysResponder(resp)
	if err != nil {
		err = autorest.NewErrorWithError(err, "eventgrid.TopicsClient", "ListSharedAccessKeys", resp, "Failure responding to request")
		return
	}

	return
}

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

	const APIVersion = "2017-09-15-preview"
	queryParameters := map[string]interface{}{
		"api-version": APIVersion,
	}

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

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

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

// RegenerateKey regenerate a shared access key for a topic
// Parameters:
// resourceGroupName - the name of the resource group within the user's subscription.
// topicName - name of the topic
// regenerateKeyRequest - request body to regenerate key
func (client TopicsClient) RegenerateKey(ctx context.Context, resourceGroupName string, topicName string, regenerateKeyRequest TopicRegenerateKeyRequest) (result TopicSharedAccessKeys, err error) {
	if tracing.IsEnabled() {
		ctx = tracing.StartSpan(ctx, fqdn+"/TopicsClient.RegenerateKey")
		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: regenerateKeyRequest,
			Constraints: []validation.Constraint{{Target: "regenerateKeyRequest.KeyName", Name: validation.Null, Rule: true, Chain: nil}}}}); err != nil {
		return result, validation.NewError("eventgrid.TopicsClient", "RegenerateKey", err.Error())
	}

	req, err := client.RegenerateKeyPreparer(ctx, resourceGroupName, topicName, regenerateKeyRequest)
	if err != nil {
		err = autorest.NewErrorWithError(err, "eventgrid.TopicsClient", "RegenerateKey", nil, "Failure preparing request")
		return
	}

	resp, err := client.RegenerateKeySender(req)
	if err != nil {
		result.Response = autorest.Response{Response: resp}
		err = autorest.NewErrorWithError(err, "eventgrid.TopicsClient", "RegenerateKey", resp, "Failure sending request")
		return
	}

	result, err = client.RegenerateKeyResponder(resp)
	if err != nil {
		err = autorest.NewErrorWithError(err, "eventgrid.TopicsClient", "RegenerateKey", resp, "Failure responding to request")
		return
	}

	return
}

// RegenerateKeyPreparer prepares the RegenerateKey request.
func (client TopicsClient) RegenerateKeyPreparer(ctx context.Context, resourceGroupName string, topicName string, regenerateKeyRequest TopicRegenerateKeyRequest) (*http.Request, error) {
	pathParameters := map[string]interface{}{
		"resourceGroupName": autorest.Encode("path", resourceGroupName),
		"subscriptionId":    autorest.Encode("path", client.SubscriptionID),
		"topicName":         autorest.Encode("path", topicName),
	}

	const APIVersion = "2017-09-15-preview"
	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.EventGrid/topics/{topicName}/regenerateKey", pathParameters),
		autorest.WithJSON(regenerateKeyRequest),
		autorest.WithQueryParameters(queryParameters))
	return preparer.Prepare((&http.Request{}).WithContext(ctx))
}

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

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

// Update asynchronously updates a topic with the specified parameters.
// Parameters:
// resourceGroupName - the name of the resource group within the user's subscription.
// topicName - name of the topic
// topicUpdateParameters - topic update information
func (client TopicsClient) Update(ctx context.Context, resourceGroupName string, topicName string, topicUpdateParameters TopicUpdateParameters) (result TopicsUpdateFuture, err error) {
	if tracing.IsEnabled() {
		ctx = tracing.StartSpan(ctx, fqdn+"/TopicsClient.Update")
		defer func() {
			sc := -1
			if result.FutureAPI != nil && result.FutureAPI.Response() != nil {
				sc = result.FutureAPI.Response().StatusCode
			}
			tracing.EndSpan(ctx, sc, err)
		}()
	}
	req, err := client.UpdatePreparer(ctx, resourceGroupName, topicName, topicUpdateParameters)
	if err != nil {
		err = autorest.NewErrorWithError(err, "eventgrid.TopicsClient", "Update", nil, "Failure preparing request")
		return
	}

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

	return
}

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

	const APIVersion = "2017-09-15-preview"
	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.EventGrid/topics/{topicName}", pathParameters),
		autorest.WithJSON(topicUpdateParameters),
		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 TopicsClient) UpdateSender(req *http.Request) (future TopicsUpdateFuture, 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 TopicsClient) (t Topic, err error) {
		var done bool
		done, err = future.DoneWithContext(context.Background(), client)
		if err != nil {
			err = autorest.NewErrorWithError(err, "eventgrid.TopicsUpdateFuture", "Result", future.Response(), "Polling failure")
			return
		}
		if !done {
			err = azure.NewAsyncOpIncompleteError("eventgrid.TopicsUpdateFuture")
			return
		}
		sender := autorest.DecorateSender(client, autorest.DoRetryForStatusCodes(client.RetryAttempts, client.RetryDuration, autorest.StatusCodesForRetry...))
		t.Response.Response, err = future.GetResult(sender)
		if t.Response.Response == nil && err == nil {
			err = autorest.NewErrorWithError(err, "eventgrid.TopicsUpdateFuture", "Result", nil, "received nil response and error")
		}
		if err == nil && t.Response.Response.StatusCode != http.StatusNoContent {
			t, err = client.UpdateResponder(t.Response.Response)
			if err != nil {
				err = autorest.NewErrorWithError(err, "eventgrid.TopicsUpdateFuture", "Result", t.Response.Response, "Failure responding to request")
			}
		}
		return
	}
	return
}

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