// Code generated by smithy-go-codegen DO NOT EDIT.

package sts

import (
	"context"
	"fmt"
	awsmiddleware "github.com/aws/aws-sdk-go-v2/aws/middleware"
	"github.com/aws/aws-sdk-go-v2/aws/signer/v4"
	"github.com/aws/smithy-go/middleware"
	smithyhttp "github.com/aws/smithy-go/transport/http"
)

// Returns details about the IAM user or role whose credentials are used to call
// the operation.
//
// No permissions are required to perform this operation. If an administrator
// attaches a policy to your identity that explicitly denies access to the
// sts:GetCallerIdentity action, you can still perform this operation. Permissions
// are not required because the same information is returned when access is denied.
// To view an example response, see [I Am Not Authorized to Perform: iam:DeleteVirtualMFADevice]in the IAM User Guide.
//
// [I Am Not Authorized to Perform: iam:DeleteVirtualMFADevice]: https://docs.aws.amazon.com/IAM/latest/UserGuide/troubleshoot_general.html#troubleshoot_general_access-denied-delete-mfa
func (c *Client) GetCallerIdentity(ctx context.Context, params *GetCallerIdentityInput, optFns ...func(*Options)) (*GetCallerIdentityOutput, error) {
	if params == nil {
		params = &GetCallerIdentityInput{}
	}

	result, metadata, err := c.invokeOperation(ctx, "GetCallerIdentity", params, optFns, c.addOperationGetCallerIdentityMiddlewares)
	if err != nil {
		return nil, err
	}

	out := result.(*GetCallerIdentityOutput)
	out.ResultMetadata = metadata
	return out, nil
}

type GetCallerIdentityInput struct {
	noSmithyDocumentSerde
}

// Contains the response to a successful GetCallerIdentity request, including information about the
// entity making the request.
type GetCallerIdentityOutput struct {

	// The Amazon Web Services account ID number of the account that owns or contains
	// the calling entity.
	Account *string

	// The Amazon Web Services ARN associated with the calling entity.
	Arn *string

	// The unique identifier of the calling entity. The exact value depends on the
	// type of entity that is making the call. The values returned are those listed in
	// the aws:userid column in the [Principal table]found on the Policy Variables reference page in
	// the IAM User Guide.
	//
	// [Principal table]: https://docs.aws.amazon.com/IAM/latest/UserGuide/reference_policies_variables.html#principaltable
	UserId *string

	// Metadata pertaining to the operation's result.
	ResultMetadata middleware.Metadata

	noSmithyDocumentSerde
}

func (c *Client) addOperationGetCallerIdentityMiddlewares(stack *middleware.Stack, options Options) (err error) {
	if err := stack.Serialize.Add(&setOperationInputMiddleware{}, middleware.After); err != nil {
		return err
	}
	err = stack.Serialize.Add(&awsAwsquery_serializeOpGetCallerIdentity{}, middleware.After)
	if err != nil {
		return err
	}
	err = stack.Deserialize.Add(&awsAwsquery_deserializeOpGetCallerIdentity{}, middleware.After)
	if err != nil {
		return err
	}
	if err := addProtocolFinalizerMiddlewares(stack, options, "GetCallerIdentity"); err != nil {
		return fmt.Errorf("add protocol finalizers: %v", err)
	}

	if err = addlegacyEndpointContextSetter(stack, options); err != nil {
		return err
	}
	if err = addSetLoggerMiddleware(stack, options); err != nil {
		return err
	}
	if err = addClientRequestID(stack); err != nil {
		return err
	}
	if err = addComputeContentLength(stack); err != nil {
		return err
	}
	if err = addResolveEndpointMiddleware(stack, options); err != nil {
		return err
	}
	if err = addComputePayloadSHA256(stack); err != nil {
		return err
	}
	if err = addRetry(stack, options); err != nil {
		return err
	}
	if err = addRawResponseToMetadata(stack); err != nil {
		return err
	}
	if err = addRecordResponseTiming(stack); err != nil {
		return err
	}
	if err = addSpanRetryLoop(stack, options); err != nil {
		return err
	}
	if err = addClientUserAgent(stack, options); err != nil {
		return err
	}
	if err = smithyhttp.AddErrorCloseResponseBodyMiddleware(stack); err != nil {
		return err
	}
	if err = smithyhttp.AddCloseResponseBodyMiddleware(stack); err != nil {
		return err
	}
	if err = addSetLegacyContextSigningOptionsMiddleware(stack); err != nil {
		return err
	}
	if err = addTimeOffsetBuild(stack, c); err != nil {
		return err
	}
	if err = addUserAgentRetryMode(stack, options); err != nil {
		return err
	}
	if err = stack.Initialize.Add(newServiceMetadataMiddleware_opGetCallerIdentity(options.Region), middleware.Before); err != nil {
		return err
	}
	if err = addRecursionDetection(stack); err != nil {
		return err
	}
	if err = addRequestIDRetrieverMiddleware(stack); err != nil {
		return err
	}
	if err = addResponseErrorMiddleware(stack); err != nil {
		return err
	}
	if err = addRequestResponseLogging(stack, options); err != nil {
		return err
	}
	if err = addDisableHTTPSMiddleware(stack, options); err != nil {
		return err
	}
	if err = addSpanInitializeStart(stack); err != nil {
		return err
	}
	if err = addSpanInitializeEnd(stack); err != nil {
		return err
	}
	if err = addSpanBuildRequestStart(stack); err != nil {
		return err
	}
	if err = addSpanBuildRequestEnd(stack); err != nil {
		return err
	}
	return nil
}

func newServiceMetadataMiddleware_opGetCallerIdentity(region string) *awsmiddleware.RegisterServiceMetadata {
	return &awsmiddleware.RegisterServiceMetadata{
		Region:        region,
		ServiceID:     ServiceID,
		OperationName: "GetCallerIdentity",
	}
}

// PresignGetCallerIdentity is used to generate a presigned HTTP Request which
// contains presigned URL, signed headers and HTTP method used.
func (c *PresignClient) PresignGetCallerIdentity(ctx context.Context, params *GetCallerIdentityInput, optFns ...func(*PresignOptions)) (*v4.PresignedHTTPRequest, error) {
	if params == nil {
		params = &GetCallerIdentityInput{}
	}
	options := c.options.copy()
	for _, fn := range optFns {
		fn(&options)
	}
	clientOptFns := append(options.ClientOptions, withNopHTTPClientAPIOption)

	result, _, err := c.client.invokeOperation(ctx, "GetCallerIdentity", params, clientOptFns,
		c.client.addOperationGetCallerIdentityMiddlewares,
		presignConverter(options).convertToPresignMiddleware,
	)
	if err != nil {
		return nil, err
	}

	out := result.(*v4.PresignedHTTPRequest)
	return out, nil
}