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

package lambda

import (
	"context"
	"errors"
	"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 information about the function or function version, with a link to
// download the deployment package that's valid for 10 minutes. If you specify a
// function version, only details that are specific to that version are returned.
func (c *Client) GetFunction(ctx context.Context, params *GetFunctionInput, optFns ...func(*Options)) (*GetFunctionOutput, error) {
	if params == nil {
		params = &GetFunctionInput{}
	}

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

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

type GetFunctionInput 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
}

type GetFunctionOutput struct {

	// The deployment package of the function or version.
	Code *types.FunctionCodeLocation

	// The function's reserved concurrency (https://docs.aws.amazon.com/lambda/latest/dg/concurrent-executions.html)
	// .
	Concurrency *types.Concurrency

	// The configuration of the function or version.
	Configuration *types.FunctionConfiguration

	// The function's tags (https://docs.aws.amazon.com/lambda/latest/dg/tagging.html) .
	Tags map[string]string

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

	noSmithyDocumentSerde
}

func (c *Client) addOperationGetFunctionMiddlewares(stack *middleware.Stack, options Options) (err error) {
	err = stack.Serialize.Add(&awsRestjson1_serializeOpGetFunction{}, middleware.After)
	if err != nil {
		return err
	}
	err = stack.Deserialize.Add(&awsRestjson1_deserializeOpGetFunction{}, 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 = addOpGetFunctionValidationMiddleware(stack); err != nil {
		return err
	}
	if err = stack.Initialize.Add(newServiceMetadataMiddleware_opGetFunction(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
}

// GetFunctionAPIClient is a client that implements the GetFunction operation.
type GetFunctionAPIClient interface {
	GetFunction(context.Context, *GetFunctionInput, ...func(*Options)) (*GetFunctionOutput, error)
}

var _ GetFunctionAPIClient = (*Client)(nil)

// FunctionActiveV2WaiterOptions are waiter options for FunctionActiveV2Waiter
type FunctionActiveV2WaiterOptions 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,
	// FunctionActiveV2Waiter will use default minimum delay of 1 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, FunctionActiveV2Waiter 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, *GetFunctionInput, *GetFunctionOutput, error) (bool, error)
}

// FunctionActiveV2Waiter defines the waiters for FunctionActiveV2
type FunctionActiveV2Waiter struct {
	client GetFunctionAPIClient

	options FunctionActiveV2WaiterOptions
}

// NewFunctionActiveV2Waiter constructs a FunctionActiveV2Waiter.
func NewFunctionActiveV2Waiter(client GetFunctionAPIClient, optFns ...func(*FunctionActiveV2WaiterOptions)) *FunctionActiveV2Waiter {
	options := FunctionActiveV2WaiterOptions{}
	options.MinDelay = 1 * time.Second
	options.MaxDelay = 120 * time.Second
	options.Retryable = functionActiveV2StateRetryable

	for _, fn := range optFns {
		fn(&options)
	}
	return &FunctionActiveV2Waiter{
		client:  client,
		options: options,
	}
}

// Wait calls the waiter function for FunctionActiveV2 waiter. The maxWaitDur is
// the maximum wait duration the waiter will wait. The maxWaitDur is required and
// must be greater than zero.
func (w *FunctionActiveV2Waiter) Wait(ctx context.Context, params *GetFunctionInput, maxWaitDur time.Duration, optFns ...func(*FunctionActiveV2WaiterOptions)) error {
	_, err := w.WaitForOutput(ctx, params, maxWaitDur, optFns...)
	return err
}

// WaitForOutput calls the waiter function for FunctionActiveV2 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 *FunctionActiveV2Waiter) WaitForOutput(ctx context.Context, params *GetFunctionInput, maxWaitDur time.Duration, optFns ...func(*FunctionActiveV2WaiterOptions)) (*GetFunctionOutput, 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.GetFunction(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 FunctionActiveV2 waiter")
}

func functionActiveV2StateRetryable(ctx context.Context, input *GetFunctionInput, output *GetFunctionOutput, err error) (bool, error) {

	if err == nil {
		pathValue, err := jmespath.Search("Configuration.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("Configuration.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("Configuration.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
}

// FunctionExistsWaiterOptions are waiter options for FunctionExistsWaiter
type FunctionExistsWaiterOptions 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,
	// FunctionExistsWaiter will use default minimum delay of 1 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, FunctionExistsWaiter 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, *GetFunctionInput, *GetFunctionOutput, error) (bool, error)
}

// FunctionExistsWaiter defines the waiters for FunctionExists
type FunctionExistsWaiter struct {
	client GetFunctionAPIClient

	options FunctionExistsWaiterOptions
}

// NewFunctionExistsWaiter constructs a FunctionExistsWaiter.
func NewFunctionExistsWaiter(client GetFunctionAPIClient, optFns ...func(*FunctionExistsWaiterOptions)) *FunctionExistsWaiter {
	options := FunctionExistsWaiterOptions{}
	options.MinDelay = 1 * time.Second
	options.MaxDelay = 120 * time.Second
	options.Retryable = functionExistsStateRetryable

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

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

// WaitForOutput calls the waiter function for FunctionExists 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 *FunctionExistsWaiter) WaitForOutput(ctx context.Context, params *GetFunctionInput, maxWaitDur time.Duration, optFns ...func(*FunctionExistsWaiterOptions)) (*GetFunctionOutput, 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.GetFunction(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 FunctionExists waiter")
}

func functionExistsStateRetryable(ctx context.Context, input *GetFunctionInput, output *GetFunctionOutput, err error) (bool, error) {

	if err == nil {
		return false, nil
	}

	if err != nil {
		var errorType *types.ResourceNotFoundException
		if errors.As(err, &errorType) {
			return true, nil
		}
	}

	return true, nil
}

// FunctionUpdatedV2WaiterOptions are waiter options for FunctionUpdatedV2Waiter
type FunctionUpdatedV2WaiterOptions 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,
	// FunctionUpdatedV2Waiter will use default minimum delay of 1 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, FunctionUpdatedV2Waiter 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, *GetFunctionInput, *GetFunctionOutput, error) (bool, error)
}

// FunctionUpdatedV2Waiter defines the waiters for FunctionUpdatedV2
type FunctionUpdatedV2Waiter struct {
	client GetFunctionAPIClient

	options FunctionUpdatedV2WaiterOptions
}

// NewFunctionUpdatedV2Waiter constructs a FunctionUpdatedV2Waiter.
func NewFunctionUpdatedV2Waiter(client GetFunctionAPIClient, optFns ...func(*FunctionUpdatedV2WaiterOptions)) *FunctionUpdatedV2Waiter {
	options := FunctionUpdatedV2WaiterOptions{}
	options.MinDelay = 1 * time.Second
	options.MaxDelay = 120 * time.Second
	options.Retryable = functionUpdatedV2StateRetryable

	for _, fn := range optFns {
		fn(&options)
	}
	return &FunctionUpdatedV2Waiter{
		client:  client,
		options: options,
	}
}

// Wait calls the waiter function for FunctionUpdatedV2 waiter. The maxWaitDur is
// the maximum wait duration the waiter will wait. The maxWaitDur is required and
// must be greater than zero.
func (w *FunctionUpdatedV2Waiter) Wait(ctx context.Context, params *GetFunctionInput, maxWaitDur time.Duration, optFns ...func(*FunctionUpdatedV2WaiterOptions)) error {
	_, err := w.WaitForOutput(ctx, params, maxWaitDur, optFns...)
	return err
}

// WaitForOutput calls the waiter function for FunctionUpdatedV2 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 *FunctionUpdatedV2Waiter) WaitForOutput(ctx context.Context, params *GetFunctionInput, maxWaitDur time.Duration, optFns ...func(*FunctionUpdatedV2WaiterOptions)) (*GetFunctionOutput, 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.GetFunction(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 FunctionUpdatedV2 waiter")
}

func functionUpdatedV2StateRetryable(ctx context.Context, input *GetFunctionInput, output *GetFunctionOutput, err error) (bool, error) {

	if err == nil {
		pathValue, err := jmespath.Search("Configuration.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("Configuration.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("Configuration.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_opGetFunction(region string) *awsmiddleware.RegisterServiceMetadata {
	return &awsmiddleware.RegisterServiceMetadata{
		Region:        region,
		ServiceID:     ServiceID,
		SigningName:   "lambda",
		OperationName: "GetFunction",
	}
}