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

package dynamodb

import (
	"context"
	"fmt"
	"github.com/aws/aws-sdk-go-v2/service/dynamodb/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"
	"time"
)

// Represents the properties of the import.
func (c *Client) DescribeImport(ctx context.Context, params *DescribeImportInput, optFns ...func(*Options)) (*DescribeImportOutput, error) {
	if params == nil {
		params = &DescribeImportInput{}
	}

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

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

type DescribeImportInput struct {

	//  The Amazon Resource Name (ARN) associated with the table you're importing to.
	//
	// This member is required.
	ImportArn *string

	noSmithyDocumentSerde
}

func (in *DescribeImportInput) bindEndpointParams(p *EndpointParameters) {

	p.ResourceArn = in.ImportArn

}

type DescribeImportOutput struct {

	//  Represents the properties of the table created for the import, and parameters
	// of the import. The import parameters include import status, how many items were
	// processed, and how many errors were encountered.
	//
	// This member is required.
	ImportTableDescription *types.ImportTableDescription

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

	noSmithyDocumentSerde
}

func (c *Client) addOperationDescribeImportMiddlewares(stack *middleware.Stack, options Options) (err error) {
	err = stack.Serialize.Add(&awsAwsjson10_serializeOpDescribeImport{}, middleware.After)
	if err != nil {
		return err
	}
	err = stack.Deserialize.Add(&awsAwsjson10_deserializeOpDescribeImport{}, middleware.After)
	if err != nil {
		return err
	}

	if err = addlegacyEndpointContextSetter(stack, options); 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 = addRecordResponseTiming(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 = addUserAgentAccountIDEndpointMode(stack, options); err != nil {
		return err
	}
	if err = addCredentialSource(stack, options); err != nil {
		return err
	}
	if err = addOpDescribeImportValidationMiddleware(stack); err != nil {
		return err
	}
	if err = stack.Initialize.Add(newServiceMetadataMiddleware(options.Region, "DescribeImport"), middleware.Before); err != nil {
		return err
	}
	if err = addRequestIDRetrieverMiddleware(stack); err != nil {
		return err
	}
	if err = addResponseErrorMiddleware(stack); err != nil {
		return err
	}
	if err = addValidateResponseChecksum(stack, options); err != nil {
		return err
	}
	if err = addAcceptEncodingGzip(stack, options); err != nil {
		return err
	}
	if err = addRequestResponseLogging(stack, options); err != nil {
		return err
	}
	if err = addDisableHTTPSMiddleware(stack, options); err != nil {
		return err
	}
	if err = addInterceptors(stack, options); err != nil {
		return err
	}
	return nil
}

// ImportCompletedWaiterOptions are waiter options for ImportCompletedWaiter
type ImportCompletedWaiterOptions 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.
	//
	// Passing options here is functionally equivalent to passing values to this
	// config's ClientOptions field that extend the inner client's APIOptions directly.
	APIOptions []func(*middleware.Stack) error

	// Functional options to be passed to all operations invoked by this client.
	//
	// Function values that modify the inner APIOptions are applied after the waiter
	// config's own APIOptions modifiers.
	ClientOptions []func(*Options)

	// MinDelay is the minimum amount of time to delay between retries. If unset,
	// ImportCompletedWaiter will use default minimum delay of 20 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, ImportCompletedWaiter 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, *DescribeImportInput, *DescribeImportOutput, error) (bool, error)
}

// ImportCompletedWaiter defines the waiters for ImportCompleted
type ImportCompletedWaiter struct {
	client DescribeImportAPIClient

	options ImportCompletedWaiterOptions
}

// NewImportCompletedWaiter constructs a ImportCompletedWaiter.
func NewImportCompletedWaiter(client DescribeImportAPIClient, optFns ...func(*ImportCompletedWaiterOptions)) *ImportCompletedWaiter {
	options := ImportCompletedWaiterOptions{}
	options.MinDelay = 20 * time.Second
	options.MaxDelay = 120 * time.Second
	options.Retryable = importCompletedStateRetryable

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

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

// WaitForOutput calls the waiter function for ImportCompleted 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 *ImportCompletedWaiter) WaitForOutput(ctx context.Context, params *DescribeImportInput, maxWaitDur time.Duration, optFns ...func(*ImportCompletedWaiterOptions)) (*DescribeImportOutput, 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.DescribeImport(ctx, params, func(o *Options) {
			baseOpts := []func(*Options){
				addIsWaiterUserAgent,
			}
			o.APIOptions = append(o.APIOptions, apiOptions...)
			for _, opt := range baseOpts {
				opt(o)
			}
			for _, opt := range options.ClientOptions {
				opt(o)
			}
		})

		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 ImportCompleted waiter")
}

func importCompletedStateRetryable(ctx context.Context, input *DescribeImportInput, output *DescribeImportOutput, err error) (bool, error) {

	if err == nil {
		v1 := output.ImportTableDescription
		var v2 types.ImportStatus
		if v1 != nil {
			v3 := v1.ImportStatus
			v2 = v3
		}
		expectedValue := "COMPLETED"
		var pathValue string
		pathValue = string(v2)
		if pathValue == expectedValue {
			return false, nil
		}
	}

	if err == nil {
		v1 := output.ImportTableDescription
		var v2 types.ImportStatus
		if v1 != nil {
			v3 := v1.ImportStatus
			v2 = v3
		}
		expectedValue := "FAILED"
		var pathValue string
		pathValue = string(v2)
		if pathValue == expectedValue {
			return false, fmt.Errorf("waiter state transitioned to Failure")
		}
	}

	if err == nil {
		v1 := output.ImportTableDescription
		var v2 types.ImportStatus
		if v1 != nil {
			v3 := v1.ImportStatus
			v2 = v3
		}
		expectedValue := "CANCELLED"
		var pathValue string
		pathValue = string(v2)
		if pathValue == expectedValue {
			return false, fmt.Errorf("waiter state transitioned to Failure")
		}
	}

	if err != nil {
		return false, err
	}
	return true, nil
}

// DescribeImportAPIClient is a client that implements the DescribeImport
// operation.
type DescribeImportAPIClient interface {
	DescribeImport(context.Context, *DescribeImportInput, ...func(*Options)) (*DescribeImportOutput, error)
}

var _ DescribeImportAPIClient = (*Client)(nil)
