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

package rekognition

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

// Searches for UserIDs within a collection based on a FaceId or UserId . This API
// can be used to find the closest UserID (with a highest similarity) to associate
// a face. The request must be provided with either FaceId or UserId . The
// operation returns an array of UserID that match the FaceId or UserId , ordered
// by similarity score with the highest similarity first.
func (c *Client) SearchUsers(ctx context.Context, params *SearchUsersInput, optFns ...func(*Options)) (*SearchUsersOutput, error) {
	if params == nil {
		params = &SearchUsersInput{}
	}

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

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

type SearchUsersInput struct {

	// The ID of an existing collection containing the UserID, used with a UserId or
	// FaceId. If a FaceId is provided, UserId isn’t required to be present in the
	// Collection.
	//
	// This member is required.
	CollectionId *string

	// ID for the existing face.
	FaceId *string

	// Maximum number of identities to return.
	MaxUsers *int32

	// ID for the existing User.
	UserId *string

	// Optional value that specifies the minimum confidence in the matched UserID to
	// return. Default value of 80.
	UserMatchThreshold *float32

	noSmithyDocumentSerde
}

type SearchUsersOutput struct {

	// Version number of the face detection model associated with the input
	// CollectionId.
	FaceModelVersion *string

	// Contains the ID of a face that was used to search for matches in a collection.
	SearchedFace *types.SearchedFace

	// Contains the ID of the UserID that was used to search for matches in a
	// collection.
	SearchedUser *types.SearchedUser

	// An array of UserMatch objects that matched the input face along with the
	// confidence in the match. Array will be empty if there are no matches.
	UserMatches []types.UserMatch

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

	noSmithyDocumentSerde
}

func (c *Client) addOperationSearchUsersMiddlewares(stack *middleware.Stack, options Options) (err error) {
	err = stack.Serialize.Add(&awsAwsjson11_serializeOpSearchUsers{}, middleware.After)
	if err != nil {
		return err
	}
	err = stack.Deserialize.Add(&awsAwsjson11_deserializeOpSearchUsers{}, middleware.After)
	if err != nil {
		return err
	}
	if err = addSetLoggerMiddleware(stack, options); err != nil {
		return err
	}
	if err = awsmiddleware.AddClientRequestIDMiddleware(stack); err != nil {
		return err
	}
	if err = smithyhttp.AddComputeContentLengthMiddleware(stack); err != nil {
		return err
	}
	if err = addResolveEndpointMiddleware(stack, options); err != nil {
		return err
	}
	if err = v4.AddComputePayloadSHA256Middleware(stack); err != nil {
		return err
	}
	if err = addRetryMiddlewares(stack, options); err != nil {
		return err
	}
	if err = addHTTPSignerV4Middleware(stack, options); err != nil {
		return err
	}
	if err = awsmiddleware.AddRawResponseToMetadata(stack); err != nil {
		return err
	}
	if err = awsmiddleware.AddRecordResponseTiming(stack); 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 = addOpSearchUsersValidationMiddleware(stack); err != nil {
		return err
	}
	if err = stack.Initialize.Add(newServiceMetadataMiddleware_opSearchUsers(options.Region), middleware.Before); err != nil {
		return err
	}
	if err = awsmiddleware.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
	}
	return nil
}

func newServiceMetadataMiddleware_opSearchUsers(region string) *awsmiddleware.RegisterServiceMetadata {
	return &awsmiddleware.RegisterServiceMetadata{
		Region:        region,
		ServiceID:     ServiceID,
		SigningName:   "rekognition",
		OperationName: "SearchUsers",
	}
}