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

package lambda

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/aws-sdk-go-v2/service/lambda/types"
	"github.com/aws/smithy-go/middleware"
	smithytime "github.com/aws/smithy-go/time"
	smithyhttp "github.com/aws/smithy-go/transport/http"
	smithywaiter "github.com/aws/smithy-go/waiter"
	"github.com/jmespath/go-jmespath"
	"time"
)

// Returns the version-specific settings of a Lambda function or version. The
// output includes only options that can vary between versions of a function. To
// modify these settings, use UpdateFunctionConfiguration. To get all of a
// function's details, including function-level settings, use GetFunction.
func (c *Client) GetFunctionConfiguration(ctx context.Context, params *GetFunctionConfigurationInput, optFns ...func(*Options)) (*GetFunctionConfigurationOutput, error) {
	if params == nil {
		params = &GetFunctionConfigurationInput{}
	}

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

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

type GetFunctionConfigurationInput struct {

	// The name of the Lambda function, version, or alias. Name formats
	//
	// * Function
	// name - my-function (name-only), my-function:v1 (with alias).
	//
	// * Function ARN -
	// arn:aws:lambda:us-west-2:123456789012:function:my-function.
	//
	// * Partial ARN -
	// 123456789012:function:my-function.
	//
	// You can append a version number or alias to
	// any of the formats. The length constraint applies only to the full ARN. If you
	// specify only the function name, it is limited to 64 characters in length.
	//
	// This member is required.
	FunctionName *string

	// Specify a version or alias to get details about a published version of the
	// function.
	Qualifier *string

	noSmithyDocumentSerde
}

// Details about a function's configuration.
type GetFunctionConfigurationOutput struct {

	// The instruction set architecture that the function supports. Architecture is a
	// string array with one of the valid values. The default architecture value is
	// x86_64.
	Architectures []types.Architecture

	// The SHA256 hash of the function's deployment package.
	CodeSha256 *string

	// The size of the function's deployment package, in bytes.
	CodeSize int64

	// The function's dead letter queue.
	DeadLetterConfig *types.DeadLetterConfig

	// The function's description.
	Description *string

	// The function's environment variables
	// (https://docs.aws.amazon.com/lambda/latest/dg/configuration-envvars.html).
	Environment *types.EnvironmentResponse

	// The size of the function’s /tmp directory in MB. The default value is 512, but
	// can be any whole number between 512 and 10240 MB.
	EphemeralStorage *types.EphemeralStorage

	// Connection settings for an Amazon EFS file system
	// (https://docs.aws.amazon.com/lambda/latest/dg/configuration-filesystem.html).
	FileSystemConfigs []types.FileSystemConfig

	// The function's Amazon Resource Name (ARN).
	FunctionArn *string

	// The name of the function.
	FunctionName *string

	// The function that Lambda calls to begin executing your function.
	Handler *string

	// The function's image configuration values.
	ImageConfigResponse *types.ImageConfigResponse

	// The KMS key that's used to encrypt the function's environment variables. This
	// key is only returned if you've configured a customer managed key.
	KMSKeyArn *string

	// The date and time that the function was last updated, in ISO-8601 format
	// (https://www.w3.org/TR/NOTE-datetime) (YYYY-MM-DDThh:mm:ss.sTZD).
	LastModified *string

	// The status of the last update that was performed on the function. This is first
	// set to Successful after function creation completes.
	LastUpdateStatus types.LastUpdateStatus

	// The reason for the last update that was performed on the function.
	LastUpdateStatusReason *string

	// The reason code for the last update that was performed on the function.
	LastUpdateStatusReasonCode types.LastUpdateStatusReasonCode

	// The function's  layers
	// (https://docs.aws.amazon.com/lambda/latest/dg/configuration-layers.html).
	Layers []types.Layer

	// For Lambda@Edge functions, the ARN of the main function.
	MasterArn *string

	// The amount of memory available to the function at runtime.
	MemorySize *int32

	// The type of deployment package. Set to Image for container image and set Zip for
	// .zip file archive.
	PackageType types.PackageType

	// The latest updated revision of the function or alias.
	RevisionId *string

	// The function's execution role.
	Role *string

	// The runtime environment for the Lambda function.
	Runtime types.Runtime

	// The ARN of the signing job.
	SigningJobArn *string

	// The ARN of the signing profile version.
	SigningProfileVersionArn *string

	// The current state of the function. When the state is Inactive, you can
	// reactivate the function by invoking it.
	State types.State

	// The reason for the function's current state.
	StateReason *string

	// The reason code for the function's current state. When the code is Creating, you
	// can't invoke or modify the function.
	StateReasonCode types.StateReasonCode

	// The amount of time in seconds that Lambda allows a function to run before
	// stopping it.
	Timeout *int32

	// The function's X-Ray tracing configuration.
	TracingConfig *types.TracingConfigResponse

	// The version of the Lambda function.
	Version *string

	// The function's networking configuration.
	VpcConfig *types.VpcConfigResponse

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

	noSmithyDocumentSerde
}

func (c *Client) addOperationGetFunctionConfigurationMiddlewares(stack *middleware.Stack, options Options) (err error) {
	err = stack.Serialize.Add(&awsRestjson1_serializeOpGetFunctionConfiguration{}, middleware.After)
	if err != nil {
		return err
	}
	err = stack.Deserialize.Add(&awsRestjson1_deserializeOpGetFunctionConfiguration{}, 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); err != nil {
		return err
	}
	if err = smithyhttp.AddErrorCloseResponseBodyMiddleware(stack); err != nil {
		return err
	}
	if err = smithyhttp.AddCloseResponseBodyMiddleware(stack); err != nil {
		return err
	}
	if err = addOpGetFunctionConfigurationValidationMiddleware(stack); err != nil {
		return err
	}
	if err = stack.Initialize.Add(newServiceMetadataMiddleware_opGetFunctionConfiguration(options.Region), middleware.Before); 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
}

// GetFunctionConfigurationAPIClient is a client that implements the
// GetFunctionConfiguration operation.
type GetFunctionConfigurationAPIClient interface {
	GetFunctionConfiguration(context.Context, *GetFunctionConfigurationInput, ...func(*Options)) (*GetFunctionConfigurationOutput, error)
}

var _ GetFunctionConfigurationAPIClient = (*Client)(nil)

// FunctionActiveWaiterOptions are waiter options for FunctionActiveWaiter
type FunctionActiveWaiterOptions struct {

	// Set of options to modify how an operation is invoked. These apply to all
	// operations invoked for this client. Use functional options on operation call to
	// modify this list for per operation behavior.
	APIOptions []func(*middleware.Stack) error

	// MinDelay is the minimum amount of time to delay between retries. If unset,
	// FunctionActiveWaiter will use default minimum delay of 5 seconds. Note that
	// MinDelay must resolve to a value lesser than or equal to the MaxDelay.
	MinDelay time.Duration

	// MaxDelay is the maximum amount of time to delay between retries. If unset or set
	// to zero, FunctionActiveWaiter will use default max delay of 120 seconds. Note
	// that MaxDelay must resolve to value greater than or equal to the MinDelay.
	MaxDelay time.Duration

	// LogWaitAttempts is used to enable logging for waiter retry attempts
	LogWaitAttempts bool

	// Retryable is function that can be used to override the service defined
	// waiter-behavior based on operation output, or returned error. This function is
	// used by the waiter to decide if a state is retryable or a terminal state. By
	// default service-modeled logic will populate this option. This option can thus be
	// used to define a custom waiter state with fall-back to service-modeled waiter
	// state mutators.The function returns an error in case of a failure state. In case
	// of retry state, this function returns a bool value of true and nil error, while
	// in case of success it returns a bool value of false and nil error.
	Retryable func(context.Context, *GetFunctionConfigurationInput, *GetFunctionConfigurationOutput, error) (bool, error)
}

// FunctionActiveWaiter defines the waiters for FunctionActive
type FunctionActiveWaiter struct {
	client GetFunctionConfigurationAPIClient

	options FunctionActiveWaiterOptions
}

// NewFunctionActiveWaiter constructs a FunctionActiveWaiter.
func NewFunctionActiveWaiter(client GetFunctionConfigurationAPIClient, optFns ...func(*FunctionActiveWaiterOptions)) *FunctionActiveWaiter {
	options := FunctionActiveWaiterOptions{}
	options.MinDelay = 5 * time.Second
	options.MaxDelay = 120 * time.Second
	options.Retryable = functionActiveStateRetryable

	for _, fn := range optFns {
		fn(&options)
	}
	return &FunctionActiveWaiter{
		client:  client,
		options: options,
	}
}

// Wait calls the waiter function for FunctionActive waiter. The maxWaitDur is the
// maximum wait duration the waiter will wait. The maxWaitDur is required and must
// be greater than zero.
func (w *FunctionActiveWaiter) Wait(ctx context.Context, params *GetFunctionConfigurationInput, maxWaitDur time.Duration, optFns ...func(*FunctionActiveWaiterOptions)) error {
	_, err := w.WaitForOutput(ctx, params, maxWaitDur, optFns...)
	return err
}

// WaitForOutput calls the waiter function for FunctionActive waiter and returns
// the output of the successful operation. The maxWaitDur is the maximum wait
// duration the waiter will wait. The maxWaitDur is required and must be greater
// than zero.
func (w *FunctionActiveWaiter) WaitForOutput(ctx context.Context, params *GetFunctionConfigurationInput, maxWaitDur time.Duration, optFns ...func(*FunctionActiveWaiterOptions)) (*GetFunctionConfigurationOutput, error) {
	if maxWaitDur <= 0 {
		return nil, fmt.Errorf("maximum wait time for waiter must be greater than zero")
	}

	options := w.options
	for _, fn := range optFns {
		fn(&options)
	}

	if options.MaxDelay <= 0 {
		options.MaxDelay = 120 * time.Second
	}

	if options.MinDelay > options.MaxDelay {
		return nil, fmt.Errorf("minimum waiter delay %v must be lesser than or equal to maximum waiter delay of %v.", options.MinDelay, options.MaxDelay)
	}

	ctx, cancelFn := context.WithTimeout(ctx, maxWaitDur)
	defer cancelFn()

	logger := smithywaiter.Logger{}
	remainingTime := maxWaitDur

	var attempt int64
	for {

		attempt++
		apiOptions := options.APIOptions
		start := time.Now()

		if options.LogWaitAttempts {
			logger.Attempt = attempt
			apiOptions = append([]func(*middleware.Stack) error{}, options.APIOptions...)
			apiOptions = append(apiOptions, logger.AddLogger)
		}

		out, err := w.client.GetFunctionConfiguration(ctx, params, func(o *Options) {
			o.APIOptions = append(o.APIOptions, apiOptions...)
		})

		retryable, err := options.Retryable(ctx, params, out, err)
		if err != nil {
			return nil, err
		}
		if !retryable {
			return out, nil
		}

		remainingTime -= time.Since(start)
		if remainingTime < options.MinDelay || remainingTime <= 0 {
			break
		}

		// compute exponential backoff between waiter retries
		delay, err := smithywaiter.ComputeDelay(
			attempt, options.MinDelay, options.MaxDelay, remainingTime,
		)
		if err != nil {
			return nil, fmt.Errorf("error computing waiter delay, %w", err)
		}

		remainingTime -= delay
		// sleep for the delay amount before invoking a request
		if err := smithytime.SleepWithContext(ctx, delay); err != nil {
			return nil, fmt.Errorf("request cancelled while waiting, %w", err)
		}
	}
	return nil, fmt.Errorf("exceeded max wait time for FunctionActive waiter")
}

func functionActiveStateRetryable(ctx context.Context, input *GetFunctionConfigurationInput, output *GetFunctionConfigurationOutput, err error) (bool, error) {

	if err == nil {
		pathValue, err := jmespath.Search("State", output)
		if err != nil {
			return false, fmt.Errorf("error evaluating waiter state: %w", err)
		}

		expectedValue := "Active"
		value, ok := pathValue.(types.State)
		if !ok {
			return false, fmt.Errorf("waiter comparator expected types.State value, got %T", pathValue)
		}

		if string(value) == expectedValue {
			return false, nil
		}
	}

	if err == nil {
		pathValue, err := jmespath.Search("State", output)
		if err != nil {
			return false, fmt.Errorf("error evaluating waiter state: %w", err)
		}

		expectedValue := "Failed"
		value, ok := pathValue.(types.State)
		if !ok {
			return false, fmt.Errorf("waiter comparator expected types.State value, got %T", pathValue)
		}

		if string(value) == expectedValue {
			return false, fmt.Errorf("waiter state transitioned to Failure")
		}
	}

	if err == nil {
		pathValue, err := jmespath.Search("State", output)
		if err != nil {
			return false, fmt.Errorf("error evaluating waiter state: %w", err)
		}

		expectedValue := "Pending"
		value, ok := pathValue.(types.State)
		if !ok {
			return false, fmt.Errorf("waiter comparator expected types.State value, got %T", pathValue)
		}

		if string(value) == expectedValue {
			return true, nil
		}
	}

	return true, nil
}

// FunctionUpdatedWaiterOptions are waiter options for FunctionUpdatedWaiter
type FunctionUpdatedWaiterOptions struct {

	// Set of options to modify how an operation is invoked. These apply to all
	// operations invoked for this client. Use functional options on operation call to
	// modify this list for per operation behavior.
	APIOptions []func(*middleware.Stack) error

	// MinDelay is the minimum amount of time to delay between retries. If unset,
	// FunctionUpdatedWaiter will use default minimum delay of 5 seconds. Note that
	// MinDelay must resolve to a value lesser than or equal to the MaxDelay.
	MinDelay time.Duration

	// MaxDelay is the maximum amount of time to delay between retries. If unset or set
	// to zero, FunctionUpdatedWaiter will use default max delay of 120 seconds. Note
	// that MaxDelay must resolve to value greater than or equal to the MinDelay.
	MaxDelay time.Duration

	// LogWaitAttempts is used to enable logging for waiter retry attempts
	LogWaitAttempts bool

	// Retryable is function that can be used to override the service defined
	// waiter-behavior based on operation output, or returned error. This function is
	// used by the waiter to decide if a state is retryable or a terminal state. By
	// default service-modeled logic will populate this option. This option can thus be
	// used to define a custom waiter state with fall-back to service-modeled waiter
	// state mutators.The function returns an error in case of a failure state. In case
	// of retry state, this function returns a bool value of true and nil error, while
	// in case of success it returns a bool value of false and nil error.
	Retryable func(context.Context, *GetFunctionConfigurationInput, *GetFunctionConfigurationOutput, error) (bool, error)
}

// FunctionUpdatedWaiter defines the waiters for FunctionUpdated
type FunctionUpdatedWaiter struct {
	client GetFunctionConfigurationAPIClient

	options FunctionUpdatedWaiterOptions
}

// NewFunctionUpdatedWaiter constructs a FunctionUpdatedWaiter.
func NewFunctionUpdatedWaiter(client GetFunctionConfigurationAPIClient, optFns ...func(*FunctionUpdatedWaiterOptions)) *FunctionUpdatedWaiter {
	options := FunctionUpdatedWaiterOptions{}
	options.MinDelay = 5 * time.Second
	options.MaxDelay = 120 * time.Second
	options.Retryable = functionUpdatedStateRetryable

	for _, fn := range optFns {
		fn(&options)
	}
	return &FunctionUpdatedWaiter{
		client:  client,
		options: options,
	}
}

// Wait calls the waiter function for FunctionUpdated waiter. The maxWaitDur is the
// maximum wait duration the waiter will wait. The maxWaitDur is required and must
// be greater than zero.
func (w *FunctionUpdatedWaiter) Wait(ctx context.Context, params *GetFunctionConfigurationInput, maxWaitDur time.Duration, optFns ...func(*FunctionUpdatedWaiterOptions)) error {
	_, err := w.WaitForOutput(ctx, params, maxWaitDur, optFns...)
	return err
}

// WaitForOutput calls the waiter function for FunctionUpdated waiter and returns
// the output of the successful operation. The maxWaitDur is the maximum wait
// duration the waiter will wait. The maxWaitDur is required and must be greater
// than zero.
func (w *FunctionUpdatedWaiter) WaitForOutput(ctx context.Context, params *GetFunctionConfigurationInput, maxWaitDur time.Duration, optFns ...func(*FunctionUpdatedWaiterOptions)) (*GetFunctionConfigurationOutput, error) {
	if maxWaitDur <= 0 {
		return nil, fmt.Errorf("maximum wait time for waiter must be greater than zero")
	}

	options := w.options
	for _, fn := range optFns {
		fn(&options)
	}

	if options.MaxDelay <= 0 {
		options.MaxDelay = 120 * time.Second
	}

	if options.MinDelay > options.MaxDelay {
		return nil, fmt.Errorf("minimum waiter delay %v must be lesser than or equal to maximum waiter delay of %v.", options.MinDelay, options.MaxDelay)
	}

	ctx, cancelFn := context.WithTimeout(ctx, maxWaitDur)
	defer cancelFn()

	logger := smithywaiter.Logger{}
	remainingTime := maxWaitDur

	var attempt int64
	for {

		attempt++
		apiOptions := options.APIOptions
		start := time.Now()

		if options.LogWaitAttempts {
			logger.Attempt = attempt
			apiOptions = append([]func(*middleware.Stack) error{}, options.APIOptions...)
			apiOptions = append(apiOptions, logger.AddLogger)
		}

		out, err := w.client.GetFunctionConfiguration(ctx, params, func(o *Options) {
			o.APIOptions = append(o.APIOptions, apiOptions...)
		})

		retryable, err := options.Retryable(ctx, params, out, err)
		if err != nil {
			return nil, err
		}
		if !retryable {
			return out, nil
		}

		remainingTime -= time.Since(start)
		if remainingTime < options.MinDelay || remainingTime <= 0 {
			break
		}

		// compute exponential backoff between waiter retries
		delay, err := smithywaiter.ComputeDelay(
			attempt, options.MinDelay, options.MaxDelay, remainingTime,
		)
		if err != nil {
			return nil, fmt.Errorf("error computing waiter delay, %w", err)
		}

		remainingTime -= delay
		// sleep for the delay amount before invoking a request
		if err := smithytime.SleepWithContext(ctx, delay); err != nil {
			return nil, fmt.Errorf("request cancelled while waiting, %w", err)
		}
	}
	return nil, fmt.Errorf("exceeded max wait time for FunctionUpdated waiter")
}

func functionUpdatedStateRetryable(ctx context.Context, input *GetFunctionConfigurationInput, output *GetFunctionConfigurationOutput, err error) (bool, error) {

	if err == nil {
		pathValue, err := jmespath.Search("LastUpdateStatus", output)
		if err != nil {
			return false, fmt.Errorf("error evaluating waiter state: %w", err)
		}

		expectedValue := "Successful"
		value, ok := pathValue.(types.LastUpdateStatus)
		if !ok {
			return false, fmt.Errorf("waiter comparator expected types.LastUpdateStatus value, got %T", pathValue)
		}

		if string(value) == expectedValue {
			return false, nil
		}
	}

	if err == nil {
		pathValue, err := jmespath.Search("LastUpdateStatus", output)
		if err != nil {
			return false, fmt.Errorf("error evaluating waiter state: %w", err)
		}

		expectedValue := "Failed"
		value, ok := pathValue.(types.LastUpdateStatus)
		if !ok {
			return false, fmt.Errorf("waiter comparator expected types.LastUpdateStatus value, got %T", pathValue)
		}

		if string(value) == expectedValue {
			return false, fmt.Errorf("waiter state transitioned to Failure")
		}
	}

	if err == nil {
		pathValue, err := jmespath.Search("LastUpdateStatus", output)
		if err != nil {
			return false, fmt.Errorf("error evaluating waiter state: %w", err)
		}

		expectedValue := "InProgress"
		value, ok := pathValue.(types.LastUpdateStatus)
		if !ok {
			return false, fmt.Errorf("waiter comparator expected types.LastUpdateStatus value, got %T", pathValue)
		}

		if string(value) == expectedValue {
			return true, nil
		}
	}

	return true, nil
}

func newServiceMetadataMiddleware_opGetFunctionConfiguration(region string) *awsmiddleware.RegisterServiceMetadata {
	return &awsmiddleware.RegisterServiceMetadata{
		Region:        region,
		ServiceID:     ServiceID,
		SigningName:   "lambda",
		OperationName: "GetFunctionConfiguration",
	}
}
