// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT License. See License.txt in the project root for license information.
// Code generated by Microsoft (R) Go Code Generator. DO NOT EDIT.

package armapimanagement

import (
	"context"
	"errors"
	"github.com/Azure/azure-sdk-for-go/sdk/azcore"
	"github.com/Azure/azure-sdk-for-go/sdk/azcore/arm"
	"github.com/Azure/azure-sdk-for-go/sdk/azcore/policy"
	"github.com/Azure/azure-sdk-for-go/sdk/azcore/runtime"
	"net/http"
	"net/url"
	"strconv"
	"strings"
)

// WorkspaceBackendClient contains the methods for the WorkspaceBackend group.
// Don't use this type directly, use NewWorkspaceBackendClient() instead.
//
// Generated from API version 2025-09-01-preview
type WorkspaceBackendClient struct {
	internal       *arm.Client
	subscriptionID string
}

// NewWorkspaceBackendClient creates a new instance of WorkspaceBackendClient with the specified values.
//   - subscriptionID - The ID of the target subscription. The value must be an UUID.
//   - credential - used to authorize requests. Usually a credential from azidentity.
//   - options - Contains optional client configuration. Pass nil to accept the default values.
func NewWorkspaceBackendClient(subscriptionID string, credential azcore.TokenCredential, options *arm.ClientOptions) (*WorkspaceBackendClient, error) {
	cl, err := arm.NewClient(moduleName, moduleVersion, credential, options)
	if err != nil {
		return nil, err
	}
	client := &WorkspaceBackendClient{
		subscriptionID: subscriptionID,
		internal:       cl,
	}
	return client, nil
}

// CreateOrUpdate - Creates or Updates a backend.
// If the operation fails it returns an *azcore.ResponseError type.
//   - resourceGroupName - The name of the resource group. The name is case insensitive.
//   - serviceName - The name of the API Management service.
//   - workspaceID - Workspace identifier. Must be unique in the current API Management service instance.
//   - backendID - Identifier of the Backend entity. Must be unique in the current API Management service instance.
//   - parameters - Create parameters.
//   - options - WorkspaceBackendClientCreateOrUpdateOptions contains the optional parameters for the WorkspaceBackendClient.CreateOrUpdate
//     method.
func (client *WorkspaceBackendClient) CreateOrUpdate(ctx context.Context, resourceGroupName string, serviceName string, workspaceID string, backendID string, parameters BackendContract, options *WorkspaceBackendClientCreateOrUpdateOptions) (WorkspaceBackendClientCreateOrUpdateResponse, error) {
	var err error
	const operationName = "WorkspaceBackendClient.CreateOrUpdate"
	ctx = context.WithValue(ctx, runtime.CtxAPINameKey{}, operationName)
	ctx, endSpan := runtime.StartSpan(ctx, operationName, client.internal.Tracer(), nil)
	defer func() { endSpan(err) }()
	req, err := client.createOrUpdateCreateRequest(ctx, resourceGroupName, serviceName, workspaceID, backendID, parameters, options)
	if err != nil {
		return WorkspaceBackendClientCreateOrUpdateResponse{}, err
	}
	httpResp, err := client.internal.Pipeline().Do(req)
	if err != nil {
		return WorkspaceBackendClientCreateOrUpdateResponse{}, err
	}
	if !runtime.HasStatusCode(httpResp, http.StatusOK, http.StatusCreated) {
		err = runtime.NewResponseError(httpResp)
		return WorkspaceBackendClientCreateOrUpdateResponse{}, err
	}
	resp, err := client.createOrUpdateHandleResponse(httpResp)
	return resp, err
}

// createOrUpdateCreateRequest creates the CreateOrUpdate request.
func (client *WorkspaceBackendClient) createOrUpdateCreateRequest(ctx context.Context, resourceGroupName string, serviceName string, workspaceID string, backendID string, parameters BackendContract, options *WorkspaceBackendClientCreateOrUpdateOptions) (*policy.Request, error) {
	urlPath := "/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.ApiManagement/service/{serviceName}/workspaces/{workspaceId}/backends/{backendId}"
	if client.subscriptionID == "" {
		return nil, errors.New("parameter client.subscriptionID cannot be empty")
	}
	urlPath = strings.ReplaceAll(urlPath, "{subscriptionId}", url.PathEscape(client.subscriptionID))
	if resourceGroupName == "" {
		return nil, errors.New("parameter resourceGroupName cannot be empty")
	}
	urlPath = strings.ReplaceAll(urlPath, "{resourceGroupName}", url.PathEscape(resourceGroupName))
	if serviceName == "" {
		return nil, errors.New("parameter serviceName cannot be empty")
	}
	urlPath = strings.ReplaceAll(urlPath, "{serviceName}", url.PathEscape(serviceName))
	if workspaceID == "" {
		return nil, errors.New("parameter workspaceID cannot be empty")
	}
	urlPath = strings.ReplaceAll(urlPath, "{workspaceId}", url.PathEscape(workspaceID))
	if backendID == "" {
		return nil, errors.New("parameter backendID cannot be empty")
	}
	urlPath = strings.ReplaceAll(urlPath, "{backendId}", url.PathEscape(backendID))
	req, err := runtime.NewRequest(ctx, http.MethodPut, runtime.JoinPaths(client.internal.Endpoint(), urlPath))
	if err != nil {
		return nil, err
	}
	reqQP := req.Raw().URL.Query()
	reqQP.Set("api-version", version20250901Preview)
	req.Raw().URL.RawQuery = strings.ReplaceAll(reqQP.Encode(), "+", "%20")
	req.Raw().Header["Accept"] = []string{"application/json"}
	if options != nil && options.IfMatch != nil {
		req.Raw().Header["If-Match"] = []string{*options.IfMatch}
	}
	req.Raw().Header["Content-Type"] = []string{"application/json"}
	if err := runtime.MarshalAsJSON(req, parameters); err != nil {
		return nil, err
	}
	return req, nil
}

// createOrUpdateHandleResponse handles the CreateOrUpdate response.
func (client *WorkspaceBackendClient) createOrUpdateHandleResponse(resp *http.Response) (WorkspaceBackendClientCreateOrUpdateResponse, error) {
	result := WorkspaceBackendClientCreateOrUpdateResponse{}
	if val := resp.Header.Get("ETag"); val != "" {
		result.ETag = &val
	}
	if val := resp.Header.Get("Retry-After"); val != "" {
		retryAfter32, err := strconv.ParseInt(val, 10, 32)
		retryAfter := int32(retryAfter32)
		if err != nil {
			return WorkspaceBackendClientCreateOrUpdateResponse{}, err
		}
		result.RetryAfter = &retryAfter
	}
	if err := runtime.UnmarshalAsJSON(resp, &result.BackendContract); err != nil {
		return WorkspaceBackendClientCreateOrUpdateResponse{}, err
	}
	return result, nil
}

// Delete - Deletes the specified backend.
// If the operation fails it returns an *azcore.ResponseError type.
//   - resourceGroupName - The name of the resource group. The name is case insensitive.
//   - serviceName - The name of the API Management service.
//   - workspaceID - Workspace identifier. Must be unique in the current API Management service instance.
//   - backendID - Identifier of the Backend entity. Must be unique in the current API Management service instance.
//   - ifMatch - ETag of the Entity. ETag should match the current entity state from the header response of the GET request or
//     it should be * for unconditional update.
//   - options - WorkspaceBackendClientDeleteOptions contains the optional parameters for the WorkspaceBackendClient.Delete method.
func (client *WorkspaceBackendClient) Delete(ctx context.Context, resourceGroupName string, serviceName string, workspaceID string, backendID string, ifMatch string, options *WorkspaceBackendClientDeleteOptions) (WorkspaceBackendClientDeleteResponse, error) {
	var err error
	const operationName = "WorkspaceBackendClient.Delete"
	ctx = context.WithValue(ctx, runtime.CtxAPINameKey{}, operationName)
	ctx, endSpan := runtime.StartSpan(ctx, operationName, client.internal.Tracer(), nil)
	defer func() { endSpan(err) }()
	req, err := client.deleteCreateRequest(ctx, resourceGroupName, serviceName, workspaceID, backendID, ifMatch, options)
	if err != nil {
		return WorkspaceBackendClientDeleteResponse{}, err
	}
	httpResp, err := client.internal.Pipeline().Do(req)
	if err != nil {
		return WorkspaceBackendClientDeleteResponse{}, err
	}
	if !runtime.HasStatusCode(httpResp, http.StatusOK, http.StatusNoContent) {
		err = runtime.NewResponseError(httpResp)
		return WorkspaceBackendClientDeleteResponse{}, err
	}
	return WorkspaceBackendClientDeleteResponse{}, nil
}

// deleteCreateRequest creates the Delete request.
func (client *WorkspaceBackendClient) deleteCreateRequest(ctx context.Context, resourceGroupName string, serviceName string, workspaceID string, backendID string, ifMatch string, _ *WorkspaceBackendClientDeleteOptions) (*policy.Request, error) {
	urlPath := "/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.ApiManagement/service/{serviceName}/workspaces/{workspaceId}/backends/{backendId}"
	if client.subscriptionID == "" {
		return nil, errors.New("parameter client.subscriptionID cannot be empty")
	}
	urlPath = strings.ReplaceAll(urlPath, "{subscriptionId}", url.PathEscape(client.subscriptionID))
	if resourceGroupName == "" {
		return nil, errors.New("parameter resourceGroupName cannot be empty")
	}
	urlPath = strings.ReplaceAll(urlPath, "{resourceGroupName}", url.PathEscape(resourceGroupName))
	if serviceName == "" {
		return nil, errors.New("parameter serviceName cannot be empty")
	}
	urlPath = strings.ReplaceAll(urlPath, "{serviceName}", url.PathEscape(serviceName))
	if workspaceID == "" {
		return nil, errors.New("parameter workspaceID cannot be empty")
	}
	urlPath = strings.ReplaceAll(urlPath, "{workspaceId}", url.PathEscape(workspaceID))
	if backendID == "" {
		return nil, errors.New("parameter backendID cannot be empty")
	}
	urlPath = strings.ReplaceAll(urlPath, "{backendId}", url.PathEscape(backendID))
	req, err := runtime.NewRequest(ctx, http.MethodDelete, runtime.JoinPaths(client.internal.Endpoint(), urlPath))
	if err != nil {
		return nil, err
	}
	reqQP := req.Raw().URL.Query()
	reqQP.Set("api-version", version20250901Preview)
	req.Raw().URL.RawQuery = strings.ReplaceAll(reqQP.Encode(), "+", "%20")
	req.Raw().Header["If-Match"] = []string{ifMatch}
	return req, nil
}

// Get - Gets the details of the backend specified by its identifier.
// If the operation fails it returns an *azcore.ResponseError type.
//   - resourceGroupName - The name of the resource group. The name is case insensitive.
//   - serviceName - The name of the API Management service.
//   - workspaceID - Workspace identifier. Must be unique in the current API Management service instance.
//   - backendID - Identifier of the Backend entity. Must be unique in the current API Management service instance.
//   - options - WorkspaceBackendClientGetOptions contains the optional parameters for the WorkspaceBackendClient.Get method.
func (client *WorkspaceBackendClient) Get(ctx context.Context, resourceGroupName string, serviceName string, workspaceID string, backendID string, options *WorkspaceBackendClientGetOptions) (WorkspaceBackendClientGetResponse, error) {
	var err error
	const operationName = "WorkspaceBackendClient.Get"
	ctx = context.WithValue(ctx, runtime.CtxAPINameKey{}, operationName)
	ctx, endSpan := runtime.StartSpan(ctx, operationName, client.internal.Tracer(), nil)
	defer func() { endSpan(err) }()
	req, err := client.getCreateRequest(ctx, resourceGroupName, serviceName, workspaceID, backendID, options)
	if err != nil {
		return WorkspaceBackendClientGetResponse{}, err
	}
	httpResp, err := client.internal.Pipeline().Do(req)
	if err != nil {
		return WorkspaceBackendClientGetResponse{}, err
	}
	if !runtime.HasStatusCode(httpResp, http.StatusOK) {
		err = runtime.NewResponseError(httpResp)
		return WorkspaceBackendClientGetResponse{}, err
	}
	resp, err := client.getHandleResponse(httpResp)
	return resp, err
}

// getCreateRequest creates the Get request.
func (client *WorkspaceBackendClient) getCreateRequest(ctx context.Context, resourceGroupName string, serviceName string, workspaceID string, backendID string, _ *WorkspaceBackendClientGetOptions) (*policy.Request, error) {
	urlPath := "/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.ApiManagement/service/{serviceName}/workspaces/{workspaceId}/backends/{backendId}"
	if client.subscriptionID == "" {
		return nil, errors.New("parameter client.subscriptionID cannot be empty")
	}
	urlPath = strings.ReplaceAll(urlPath, "{subscriptionId}", url.PathEscape(client.subscriptionID))
	if resourceGroupName == "" {
		return nil, errors.New("parameter resourceGroupName cannot be empty")
	}
	urlPath = strings.ReplaceAll(urlPath, "{resourceGroupName}", url.PathEscape(resourceGroupName))
	if serviceName == "" {
		return nil, errors.New("parameter serviceName cannot be empty")
	}
	urlPath = strings.ReplaceAll(urlPath, "{serviceName}", url.PathEscape(serviceName))
	if workspaceID == "" {
		return nil, errors.New("parameter workspaceID cannot be empty")
	}
	urlPath = strings.ReplaceAll(urlPath, "{workspaceId}", url.PathEscape(workspaceID))
	if backendID == "" {
		return nil, errors.New("parameter backendID cannot be empty")
	}
	urlPath = strings.ReplaceAll(urlPath, "{backendId}", url.PathEscape(backendID))
	req, err := runtime.NewRequest(ctx, http.MethodGet, runtime.JoinPaths(client.internal.Endpoint(), urlPath))
	if err != nil {
		return nil, err
	}
	reqQP := req.Raw().URL.Query()
	reqQP.Set("api-version", version20250901Preview)
	req.Raw().URL.RawQuery = strings.ReplaceAll(reqQP.Encode(), "+", "%20")
	req.Raw().Header["Accept"] = []string{"application/json"}
	return req, nil
}

// getHandleResponse handles the Get response.
func (client *WorkspaceBackendClient) getHandleResponse(resp *http.Response) (WorkspaceBackendClientGetResponse, error) {
	result := WorkspaceBackendClientGetResponse{}
	if val := resp.Header.Get("ETag"); val != "" {
		result.ETag = &val
	}
	if err := runtime.UnmarshalAsJSON(resp, &result.BackendContract); err != nil {
		return WorkspaceBackendClientGetResponse{}, err
	}
	return result, nil
}

// GetEntityTag - Gets the entity state (Etag) version of the backend specified by its identifier.
//   - resourceGroupName - The name of the resource group. The name is case insensitive.
//   - serviceName - The name of the API Management service.
//   - workspaceID - Workspace identifier. Must be unique in the current API Management service instance.
//   - backendID - Identifier of the Backend entity. Must be unique in the current API Management service instance.
//   - options - WorkspaceBackendClientGetEntityTagOptions contains the optional parameters for the WorkspaceBackendClient.GetEntityTag
//     method.
func (client *WorkspaceBackendClient) GetEntityTag(ctx context.Context, resourceGroupName string, serviceName string, workspaceID string, backendID string, options *WorkspaceBackendClientGetEntityTagOptions) (WorkspaceBackendClientGetEntityTagResponse, error) {
	var err error
	const operationName = "WorkspaceBackendClient.GetEntityTag"
	ctx = context.WithValue(ctx, runtime.CtxAPINameKey{}, operationName)
	ctx, endSpan := runtime.StartSpan(ctx, operationName, client.internal.Tracer(), nil)
	defer func() { endSpan(err) }()
	req, err := client.getEntityTagCreateRequest(ctx, resourceGroupName, serviceName, workspaceID, backendID, options)
	if err != nil {
		return WorkspaceBackendClientGetEntityTagResponse{}, err
	}
	httpResp, err := client.internal.Pipeline().Do(req)
	if err != nil {
		return WorkspaceBackendClientGetEntityTagResponse{}, err
	}
	if !runtime.HasStatusCode(httpResp, http.StatusOK) {
		err = runtime.NewResponseError(httpResp)
		return WorkspaceBackendClientGetEntityTagResponse{}, err
	}
	resp, err := client.getEntityTagHandleResponse(httpResp)
	return resp, err
}

// getEntityTagCreateRequest creates the GetEntityTag request.
func (client *WorkspaceBackendClient) getEntityTagCreateRequest(ctx context.Context, resourceGroupName string, serviceName string, workspaceID string, backendID string, _ *WorkspaceBackendClientGetEntityTagOptions) (*policy.Request, error) {
	urlPath := "/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.ApiManagement/service/{serviceName}/workspaces/{workspaceId}/backends/{backendId}"
	if client.subscriptionID == "" {
		return nil, errors.New("parameter client.subscriptionID cannot be empty")
	}
	urlPath = strings.ReplaceAll(urlPath, "{subscriptionId}", url.PathEscape(client.subscriptionID))
	if resourceGroupName == "" {
		return nil, errors.New("parameter resourceGroupName cannot be empty")
	}
	urlPath = strings.ReplaceAll(urlPath, "{resourceGroupName}", url.PathEscape(resourceGroupName))
	if serviceName == "" {
		return nil, errors.New("parameter serviceName cannot be empty")
	}
	urlPath = strings.ReplaceAll(urlPath, "{serviceName}", url.PathEscape(serviceName))
	if workspaceID == "" {
		return nil, errors.New("parameter workspaceID cannot be empty")
	}
	urlPath = strings.ReplaceAll(urlPath, "{workspaceId}", url.PathEscape(workspaceID))
	if backendID == "" {
		return nil, errors.New("parameter backendID cannot be empty")
	}
	urlPath = strings.ReplaceAll(urlPath, "{backendId}", url.PathEscape(backendID))
	req, err := runtime.NewRequest(ctx, http.MethodHead, runtime.JoinPaths(client.internal.Endpoint(), urlPath))
	if err != nil {
		return nil, err
	}
	reqQP := req.Raw().URL.Query()
	reqQP.Set("api-version", version20250901Preview)
	req.Raw().URL.RawQuery = strings.ReplaceAll(reqQP.Encode(), "+", "%20")
	return req, nil
}

// getEntityTagHandleResponse handles the GetEntityTag response.
func (client *WorkspaceBackendClient) getEntityTagHandleResponse(resp *http.Response) (WorkspaceBackendClientGetEntityTagResponse, error) {
	result := WorkspaceBackendClientGetEntityTagResponse{Success: resp.StatusCode >= 200 && resp.StatusCode < 300}
	if val := resp.Header.Get("ETag"); val != "" {
		result.ETag = &val
	}
	return result, nil
}

// NewListByWorkspacePager - Lists a collection of backends in the specified workspace.
//   - resourceGroupName - The name of the resource group. The name is case insensitive.
//   - serviceName - The name of the API Management service.
//   - workspaceID - Workspace identifier. Must be unique in the current API Management service instance.
//   - options - WorkspaceBackendClientListByWorkspaceOptions contains the optional parameters for the WorkspaceBackendClient.NewListByWorkspacePager
//     method.
func (client *WorkspaceBackendClient) NewListByWorkspacePager(resourceGroupName string, serviceName string, workspaceID string, options *WorkspaceBackendClientListByWorkspaceOptions) *runtime.Pager[WorkspaceBackendClientListByWorkspaceResponse] {
	return runtime.NewPager(runtime.PagingHandler[WorkspaceBackendClientListByWorkspaceResponse]{
		More: func(page WorkspaceBackendClientListByWorkspaceResponse) bool {
			return page.NextLink != nil && len(*page.NextLink) > 0
		},
		Fetcher: func(ctx context.Context, page *WorkspaceBackendClientListByWorkspaceResponse) (WorkspaceBackendClientListByWorkspaceResponse, error) {
			ctx = context.WithValue(ctx, runtime.CtxAPINameKey{}, "WorkspaceBackendClient.NewListByWorkspacePager")
			nextLink := ""
			if page != nil {
				nextLink = *page.NextLink
			}
			resp, err := runtime.FetcherForNextLink(ctx, client.internal.Pipeline(), nextLink, func(ctx context.Context) (*policy.Request, error) {
				return client.listByWorkspaceCreateRequest(ctx, resourceGroupName, serviceName, workspaceID, options)
			}, nil)
			if err != nil {
				return WorkspaceBackendClientListByWorkspaceResponse{}, err
			}
			return client.listByWorkspaceHandleResponse(resp)
		},
		Tracer: client.internal.Tracer(),
	})
}

// listByWorkspaceCreateRequest creates the ListByWorkspace request.
func (client *WorkspaceBackendClient) listByWorkspaceCreateRequest(ctx context.Context, resourceGroupName string, serviceName string, workspaceID string, options *WorkspaceBackendClientListByWorkspaceOptions) (*policy.Request, error) {
	urlPath := "/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.ApiManagement/service/{serviceName}/workspaces/{workspaceId}/backends"
	if client.subscriptionID == "" {
		return nil, errors.New("parameter client.subscriptionID cannot be empty")
	}
	urlPath = strings.ReplaceAll(urlPath, "{subscriptionId}", url.PathEscape(client.subscriptionID))
	if resourceGroupName == "" {
		return nil, errors.New("parameter resourceGroupName cannot be empty")
	}
	urlPath = strings.ReplaceAll(urlPath, "{resourceGroupName}", url.PathEscape(resourceGroupName))
	if serviceName == "" {
		return nil, errors.New("parameter serviceName cannot be empty")
	}
	urlPath = strings.ReplaceAll(urlPath, "{serviceName}", url.PathEscape(serviceName))
	if workspaceID == "" {
		return nil, errors.New("parameter workspaceID cannot be empty")
	}
	urlPath = strings.ReplaceAll(urlPath, "{workspaceId}", url.PathEscape(workspaceID))
	req, err := runtime.NewRequest(ctx, http.MethodGet, runtime.JoinPaths(client.internal.Endpoint(), urlPath))
	if err != nil {
		return nil, err
	}
	reqQP := req.Raw().URL.Query()
	if options != nil && options.Filter != nil {
		reqQP.Set("$filter", *options.Filter)
	}
	if options != nil && options.Skip != nil {
		reqQP.Set("$skip", strconv.FormatInt(int64(*options.Skip), 10))
	}
	if options != nil && options.Top != nil {
		reqQP.Set("$top", strconv.FormatInt(int64(*options.Top), 10))
	}
	reqQP.Set("api-version", version20250901Preview)
	req.Raw().URL.RawQuery = strings.ReplaceAll(reqQP.Encode(), "+", "%20")
	req.Raw().Header["Accept"] = []string{"application/json"}
	return req, nil
}

// listByWorkspaceHandleResponse handles the ListByWorkspace response.
func (client *WorkspaceBackendClient) listByWorkspaceHandleResponse(resp *http.Response) (WorkspaceBackendClientListByWorkspaceResponse, error) {
	result := WorkspaceBackendClientListByWorkspaceResponse{}
	if err := runtime.UnmarshalAsJSON(resp, &result.BackendCollection); err != nil {
		return WorkspaceBackendClientListByWorkspaceResponse{}, err
	}
	return result, nil
}

// Update - Updates an existing backend.
// If the operation fails it returns an *azcore.ResponseError type.
//   - resourceGroupName - The name of the resource group. The name is case insensitive.
//   - serviceName - The name of the API Management service.
//   - workspaceID - Workspace identifier. Must be unique in the current API Management service instance.
//   - backendID - Identifier of the Backend entity. Must be unique in the current API Management service instance.
//   - ifMatch - ETag of the Entity. ETag should match the current entity state from the header response of the GET request or
//     it should be * for unconditional update.
//   - parameters - Update parameters.
//   - options - WorkspaceBackendClientUpdateOptions contains the optional parameters for the WorkspaceBackendClient.Update method.
func (client *WorkspaceBackendClient) Update(ctx context.Context, resourceGroupName string, serviceName string, workspaceID string, backendID string, ifMatch string, parameters BackendUpdateParameters, options *WorkspaceBackendClientUpdateOptions) (WorkspaceBackendClientUpdateResponse, error) {
	var err error
	const operationName = "WorkspaceBackendClient.Update"
	ctx = context.WithValue(ctx, runtime.CtxAPINameKey{}, operationName)
	ctx, endSpan := runtime.StartSpan(ctx, operationName, client.internal.Tracer(), nil)
	defer func() { endSpan(err) }()
	req, err := client.updateCreateRequest(ctx, resourceGroupName, serviceName, workspaceID, backendID, ifMatch, parameters, options)
	if err != nil {
		return WorkspaceBackendClientUpdateResponse{}, err
	}
	httpResp, err := client.internal.Pipeline().Do(req)
	if err != nil {
		return WorkspaceBackendClientUpdateResponse{}, err
	}
	if !runtime.HasStatusCode(httpResp, http.StatusOK) {
		err = runtime.NewResponseError(httpResp)
		return WorkspaceBackendClientUpdateResponse{}, err
	}
	resp, err := client.updateHandleResponse(httpResp)
	return resp, err
}

// updateCreateRequest creates the Update request.
func (client *WorkspaceBackendClient) updateCreateRequest(ctx context.Context, resourceGroupName string, serviceName string, workspaceID string, backendID string, ifMatch string, parameters BackendUpdateParameters, _ *WorkspaceBackendClientUpdateOptions) (*policy.Request, error) {
	urlPath := "/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.ApiManagement/service/{serviceName}/workspaces/{workspaceId}/backends/{backendId}"
	if client.subscriptionID == "" {
		return nil, errors.New("parameter client.subscriptionID cannot be empty")
	}
	urlPath = strings.ReplaceAll(urlPath, "{subscriptionId}", url.PathEscape(client.subscriptionID))
	if resourceGroupName == "" {
		return nil, errors.New("parameter resourceGroupName cannot be empty")
	}
	urlPath = strings.ReplaceAll(urlPath, "{resourceGroupName}", url.PathEscape(resourceGroupName))
	if serviceName == "" {
		return nil, errors.New("parameter serviceName cannot be empty")
	}
	urlPath = strings.ReplaceAll(urlPath, "{serviceName}", url.PathEscape(serviceName))
	if workspaceID == "" {
		return nil, errors.New("parameter workspaceID cannot be empty")
	}
	urlPath = strings.ReplaceAll(urlPath, "{workspaceId}", url.PathEscape(workspaceID))
	if backendID == "" {
		return nil, errors.New("parameter backendID cannot be empty")
	}
	urlPath = strings.ReplaceAll(urlPath, "{backendId}", url.PathEscape(backendID))
	req, err := runtime.NewRequest(ctx, http.MethodPatch, runtime.JoinPaths(client.internal.Endpoint(), urlPath))
	if err != nil {
		return nil, err
	}
	reqQP := req.Raw().URL.Query()
	reqQP.Set("api-version", version20250901Preview)
	req.Raw().URL.RawQuery = strings.ReplaceAll(reqQP.Encode(), "+", "%20")
	req.Raw().Header["Accept"] = []string{"application/json"}
	req.Raw().Header["If-Match"] = []string{ifMatch}
	req.Raw().Header["Content-Type"] = []string{"application/json"}
	if err := runtime.MarshalAsJSON(req, parameters); err != nil {
		return nil, err
	}
	return req, nil
}

// updateHandleResponse handles the Update response.
func (client *WorkspaceBackendClient) updateHandleResponse(resp *http.Response) (WorkspaceBackendClientUpdateResponse, error) {
	result := WorkspaceBackendClientUpdateResponse{}
	if val := resp.Header.Get("ETag"); val != "" {
		result.ETag = &val
	}
	if err := runtime.UnmarshalAsJSON(resp, &result.BackendContract); err != nil {
		return WorkspaceBackendClientUpdateResponse{}, err
	}
	return result, nil
}
