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

package appstream

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/appstream/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"
)

// Retrieves a list that describes one or more specified fleets, if the fleet names
// are provided. Otherwise, all fleets in the account are described.
func (c *Client) DescribeFleets(ctx context.Context, params *DescribeFleetsInput, optFns ...func(*Options)) (*DescribeFleetsOutput, error) {
	if params == nil {
		params = &DescribeFleetsInput{}
	}

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

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

type DescribeFleetsInput struct {

	// The names of the fleets to describe.
	Names []string

	// The pagination token to use to retrieve the next page of results for this
	// operation. If this value is null, it retrieves the first page.
	NextToken *string
}

type DescribeFleetsOutput struct {

	// Information about the fleets.
	Fleets []types.Fleet

	// The pagination token to use to retrieve the next page of results for this
	// operation. If there are no more pages, this value is null.
	NextToken *string

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

func addOperationDescribeFleetsMiddlewares(stack *middleware.Stack, options Options) (err error) {
	err = stack.Serialize.Add(&awsAwsjson11_serializeOpDescribeFleets{}, middleware.After)
	if err != nil {
		return err
	}
	err = stack.Deserialize.Add(&awsAwsjson11_deserializeOpDescribeFleets{}, 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 = stack.Initialize.Add(newServiceMetadataMiddleware_opDescribeFleets(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
}

// DescribeFleetsAPIClient is a client that implements the DescribeFleets
// operation.
type DescribeFleetsAPIClient interface {
	DescribeFleets(context.Context, *DescribeFleetsInput, ...func(*Options)) (*DescribeFleetsOutput, error)
}

var _ DescribeFleetsAPIClient = (*Client)(nil)

// FleetStartedWaiterOptions are waiter options for FleetStartedWaiter
type FleetStartedWaiterOptions 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,
	// FleetStartedWaiter will use default minimum delay of 30 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, FleetStartedWaiter 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, *DescribeFleetsInput, *DescribeFleetsOutput, error) (bool, error)
}

// FleetStartedWaiter defines the waiters for FleetStarted
type FleetStartedWaiter struct {
	client DescribeFleetsAPIClient

	options FleetStartedWaiterOptions
}

// NewFleetStartedWaiter constructs a FleetStartedWaiter.
func NewFleetStartedWaiter(client DescribeFleetsAPIClient, optFns ...func(*FleetStartedWaiterOptions)) *FleetStartedWaiter {
	options := FleetStartedWaiterOptions{}
	options.MinDelay = 30 * time.Second
	options.MaxDelay = 120 * time.Second
	options.Retryable = fleetStartedStateRetryable

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

// Wait calls the waiter function for FleetStarted waiter. The maxWaitDur is the
// maximum wait duration the waiter will wait. The maxWaitDur is required and must
// be greater than zero.
func (w *FleetStartedWaiter) Wait(ctx context.Context, params *DescribeFleetsInput, maxWaitDur time.Duration, optFns ...func(*FleetStartedWaiterOptions)) error {
	if maxWaitDur <= 0 {
		return 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 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.DescribeFleets(ctx, params, func(o *Options) {
			o.APIOptions = append(o.APIOptions, apiOptions...)
		})

		retryable, err := options.Retryable(ctx, params, out, err)
		if err != nil {
			return err
		}
		if !retryable {
			return 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 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 fmt.Errorf("request cancelled while waiting, %w", err)
		}
	}
	return fmt.Errorf("exceeded max wait time for FleetStarted waiter")
}

func fleetStartedStateRetryable(ctx context.Context, input *DescribeFleetsInput, output *DescribeFleetsOutput, err error) (bool, error) {

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

		expectedValue := "ACTIVE"
		var match = true
		listOfValues, ok := pathValue.([]interface{})
		if !ok {
			return false, fmt.Errorf("waiter comparator expected list got %T", pathValue)
		}

		if len(listOfValues) == 0 {
			match = false
		}
		for _, v := range listOfValues {
			value, ok := v.(types.FleetState)
			if !ok {
				return false, fmt.Errorf("waiter comparator expected types.FleetState value, got %T", pathValue)
			}

			if string(value) != expectedValue {
				match = false
			}
		}

		if match {
			return false, nil
		}
	}

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

		expectedValue := "PENDING_DEACTIVATE"
		listOfValues, ok := pathValue.([]interface{})
		if !ok {
			return false, fmt.Errorf("waiter comparator expected list got %T", pathValue)
		}

		for _, v := range listOfValues {
			value, ok := v.(types.FleetState)
			if !ok {
				return false, fmt.Errorf("waiter comparator expected types.FleetState value, got %T", pathValue)
			}

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

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

		expectedValue := "INACTIVE"
		listOfValues, ok := pathValue.([]interface{})
		if !ok {
			return false, fmt.Errorf("waiter comparator expected list got %T", pathValue)
		}

		for _, v := range listOfValues {
			value, ok := v.(types.FleetState)
			if !ok {
				return false, fmt.Errorf("waiter comparator expected types.FleetState value, got %T", pathValue)
			}

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

	return true, nil
}

// FleetStoppedWaiterOptions are waiter options for FleetStoppedWaiter
type FleetStoppedWaiterOptions 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,
	// FleetStoppedWaiter will use default minimum delay of 30 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, FleetStoppedWaiter 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, *DescribeFleetsInput, *DescribeFleetsOutput, error) (bool, error)
}

// FleetStoppedWaiter defines the waiters for FleetStopped
type FleetStoppedWaiter struct {
	client DescribeFleetsAPIClient

	options FleetStoppedWaiterOptions
}

// NewFleetStoppedWaiter constructs a FleetStoppedWaiter.
func NewFleetStoppedWaiter(client DescribeFleetsAPIClient, optFns ...func(*FleetStoppedWaiterOptions)) *FleetStoppedWaiter {
	options := FleetStoppedWaiterOptions{}
	options.MinDelay = 30 * time.Second
	options.MaxDelay = 120 * time.Second
	options.Retryable = fleetStoppedStateRetryable

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

// Wait calls the waiter function for FleetStopped waiter. The maxWaitDur is the
// maximum wait duration the waiter will wait. The maxWaitDur is required and must
// be greater than zero.
func (w *FleetStoppedWaiter) Wait(ctx context.Context, params *DescribeFleetsInput, maxWaitDur time.Duration, optFns ...func(*FleetStoppedWaiterOptions)) error {
	if maxWaitDur <= 0 {
		return 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 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.DescribeFleets(ctx, params, func(o *Options) {
			o.APIOptions = append(o.APIOptions, apiOptions...)
		})

		retryable, err := options.Retryable(ctx, params, out, err)
		if err != nil {
			return err
		}
		if !retryable {
			return 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 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 fmt.Errorf("request cancelled while waiting, %w", err)
		}
	}
	return fmt.Errorf("exceeded max wait time for FleetStopped waiter")
}

func fleetStoppedStateRetryable(ctx context.Context, input *DescribeFleetsInput, output *DescribeFleetsOutput, err error) (bool, error) {

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

		expectedValue := "INACTIVE"
		var match = true
		listOfValues, ok := pathValue.([]interface{})
		if !ok {
			return false, fmt.Errorf("waiter comparator expected list got %T", pathValue)
		}

		if len(listOfValues) == 0 {
			match = false
		}
		for _, v := range listOfValues {
			value, ok := v.(types.FleetState)
			if !ok {
				return false, fmt.Errorf("waiter comparator expected types.FleetState value, got %T", pathValue)
			}

			if string(value) != expectedValue {
				match = false
			}
		}

		if match {
			return false, nil
		}
	}

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

		expectedValue := "PENDING_ACTIVATE"
		listOfValues, ok := pathValue.([]interface{})
		if !ok {
			return false, fmt.Errorf("waiter comparator expected list got %T", pathValue)
		}

		for _, v := range listOfValues {
			value, ok := v.(types.FleetState)
			if !ok {
				return false, fmt.Errorf("waiter comparator expected types.FleetState value, got %T", pathValue)
			}

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

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

		expectedValue := "ACTIVE"
		listOfValues, ok := pathValue.([]interface{})
		if !ok {
			return false, fmt.Errorf("waiter comparator expected list got %T", pathValue)
		}

		for _, v := range listOfValues {
			value, ok := v.(types.FleetState)
			if !ok {
				return false, fmt.Errorf("waiter comparator expected types.FleetState value, got %T", pathValue)
			}

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

	return true, nil
}

func newServiceMetadataMiddleware_opDescribeFleets(region string) *awsmiddleware.RegisterServiceMetadata {
	return &awsmiddleware.RegisterServiceMetadata{
		Region:        region,
		ServiceID:     ServiceID,
		SigningName:   "appstream",
		OperationName: "DescribeFleets",
	}
}