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

package appflow

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

// Activates an existing flow. For on-demand flows, this operation runs the flow
// immediately. For schedule and event-triggered flows, this operation activates
// the flow.
func (c *Client) StartFlow(ctx context.Context, params *StartFlowInput, optFns ...func(*Options)) (*StartFlowOutput, error) {
	if params == nil {
		params = &StartFlowInput{}
	}

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

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

type StartFlowInput struct {

	// The specified name of the flow. Spaces are not allowed. Use underscores (_) or
	// hyphens (-) only.
	//
	// This member is required.
	FlowName *string

	// The clientToken parameter is an idempotency token. It ensures that your
	// StartFlow request completes only once. You choose the value to pass. For
	// example, if you don't receive a response from your request, you can safely retry
	// the request with the same clientToken parameter value. If you omit a clientToken
	// value, the Amazon Web Services SDK that you are using inserts a value for you.
	// This way, the SDK can safely retry requests multiple times after a network
	// error. You must provide your own value for other use cases. If you specify input
	// parameters that differ from your first request, an error occurs for flows that
	// run on a schedule or based on an event. However, the error doesn't occur for
	// flows that run on demand. You set the conditions that initiate your flow for the
	// triggerConfig parameter. If you use a different value for clientToken , Amazon
	// AppFlow considers it a new call to StartFlow . The token is active for 8 hours.
	ClientToken *string

	noSmithyDocumentSerde
}

type StartFlowOutput struct {

	// Returns the internal execution ID of an on-demand flow when the flow is
	// started. For scheduled or event-triggered flows, this value is null.
	ExecutionId *string

	// The flow's Amazon Resource Name (ARN).
	FlowArn *string

	// Indicates the current status of the flow.
	FlowStatus types.FlowStatus

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

	noSmithyDocumentSerde
}

func (c *Client) addOperationStartFlowMiddlewares(stack *middleware.Stack, options Options) (err error) {
	err = stack.Serialize.Add(&awsRestjson1_serializeOpStartFlow{}, middleware.After)
	if err != nil {
		return err
	}
	err = stack.Deserialize.Add(&awsRestjson1_deserializeOpStartFlow{}, 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 = addIdempotencyToken_opStartFlowMiddleware(stack, options); err != nil {
		return err
	}
	if err = addOpStartFlowValidationMiddleware(stack); err != nil {
		return err
	}
	if err = stack.Initialize.Add(newServiceMetadataMiddleware_opStartFlow(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
}

type idempotencyToken_initializeOpStartFlow struct {
	tokenProvider IdempotencyTokenProvider
}

func (*idempotencyToken_initializeOpStartFlow) ID() string {
	return "OperationIdempotencyTokenAutoFill"
}

func (m *idempotencyToken_initializeOpStartFlow) HandleInitialize(ctx context.Context, in middleware.InitializeInput, next middleware.InitializeHandler) (
	out middleware.InitializeOutput, metadata middleware.Metadata, err error,
) {
	if m.tokenProvider == nil {
		return next.HandleInitialize(ctx, in)
	}

	input, ok := in.Parameters.(*StartFlowInput)
	if !ok {
		return out, metadata, fmt.Errorf("expected middleware input to be of type *StartFlowInput ")
	}

	if input.ClientToken == nil {
		t, err := m.tokenProvider.GetIdempotencyToken()
		if err != nil {
			return out, metadata, err
		}
		input.ClientToken = &t
	}
	return next.HandleInitialize(ctx, in)
}
func addIdempotencyToken_opStartFlowMiddleware(stack *middleware.Stack, cfg Options) error {
	return stack.Initialize.Add(&idempotencyToken_initializeOpStartFlow{tokenProvider: cfg.IdempotencyTokenProvider}, middleware.Before)
}

func newServiceMetadataMiddleware_opStartFlow(region string) *awsmiddleware.RegisterServiceMetadata {
	return &awsmiddleware.RegisterServiceMetadata{
		Region:        region,
		ServiceID:     ServiceID,
		SigningName:   "appflow",
		OperationName: "StartFlow",
	}
}