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

package greengrass

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/greengrass/types"
	"github.com/aws/smithy-go/middleware"
	smithyhttp "github.com/aws/smithy-go/transport/http"
)

// Retrieves a list of Lambda function definitions.
func (c *Client) ListFunctionDefinitions(ctx context.Context, params *ListFunctionDefinitionsInput, optFns ...func(*Options)) (*ListFunctionDefinitionsOutput, error) {
	if params == nil {
		params = &ListFunctionDefinitionsInput{}
	}

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

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

type ListFunctionDefinitionsInput struct {

	// The maximum number of results to be returned per request.
	MaxResults *string

	// The token for the next set of results, or ''null'' if there are no additional
	// results.
	NextToken *string

	noSmithyDocumentSerde
}

type ListFunctionDefinitionsOutput struct {

	// Information about a definition.
	Definitions []types.DefinitionInformation

	// The token for the next set of results, or ''null'' if there are no additional
	// results.
	NextToken *string

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

	noSmithyDocumentSerde
}

func (c *Client) addOperationListFunctionDefinitionsMiddlewares(stack *middleware.Stack, options Options) (err error) {
	err = stack.Serialize.Add(&awsRestjson1_serializeOpListFunctionDefinitions{}, middleware.After)
	if err != nil {
		return err
	}
	err = stack.Deserialize.Add(&awsRestjson1_deserializeOpListFunctionDefinitions{}, 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 = stack.Initialize.Add(newServiceMetadataMiddleware_opListFunctionDefinitions(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_opListFunctionDefinitions(region string) *awsmiddleware.RegisterServiceMetadata {
	return &awsmiddleware.RegisterServiceMetadata{
		Region:        region,
		ServiceID:     ServiceID,
		SigningName:   "greengrass",
		OperationName: "ListFunctionDefinitions",
	}
}