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

package dynamodb

import (
	"context"
	"fmt"
	awsmiddleware "github.com/aws/aws-sdk-go-v2/aws/middleware"
	internalEndpointDiscovery "github.com/aws/aws-sdk-go-v2/service/internal/endpoint-discovery"
	"github.com/aws/smithy-go/middleware"
	smithyhttp "github.com/aws/smithy-go/transport/http"
)

// Returns the resource-based policy document attached to the resource, which can
// be a table or stream, in JSON format.
//
// GetResourcePolicy follows an [eventually consistent] model. The following list describes the outcomes
// when you issue the GetResourcePolicy request immediately after issuing another
// request:
//
//   - If you issue a GetResourcePolicy request immediately after a
//     PutResourcePolicy request, DynamoDB might return a PolicyNotFoundException .
//
//   - If you issue a GetResourcePolicy request immediately after a
//     DeleteResourcePolicy request, DynamoDB might return the policy that was
//     present before the deletion request.
//
//   - If you issue a GetResourcePolicy request immediately after a CreateTable
//     request, which includes a resource-based policy, DynamoDB might return a
//     ResourceNotFoundException or a PolicyNotFoundException .
//
// Because GetResourcePolicy uses an eventually consistent query, the metadata for
// your policy or table might not be available at that moment. Wait for a few
// seconds, and then retry the GetResourcePolicy request.
//
// After a GetResourcePolicy request returns a policy created using the
// PutResourcePolicy request, the policy will be applied in the authorization of
// requests to the resource. Because this process is eventually consistent, it will
// take some time to apply the policy to all requests to a resource. Policies that
// you attach while creating a table using the CreateTable request will always be
// applied to all requests for that table.
//
// [eventually consistent]: https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/HowItWorks.ReadConsistency.html
func (c *Client) GetResourcePolicy(ctx context.Context, params *GetResourcePolicyInput, optFns ...func(*Options)) (*GetResourcePolicyOutput, error) {
	if params == nil {
		params = &GetResourcePolicyInput{}
	}

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

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

type GetResourcePolicyInput struct {

	// The Amazon Resource Name (ARN) of the DynamoDB resource to which the policy is
	// attached. The resources you can specify include tables and streams.
	//
	// This member is required.
	ResourceArn *string

	noSmithyDocumentSerde
}

type GetResourcePolicyOutput struct {

	// The resource-based policy document attached to the resource, which can be a
	// table or stream, in JSON format.
	Policy *string

	// A unique string that represents the revision ID of the policy. If you're
	// comparing revision IDs, make sure to always use string comparison logic.
	RevisionId *string

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

	noSmithyDocumentSerde
}

func (c *Client) addOperationGetResourcePolicyMiddlewares(stack *middleware.Stack, options Options) (err error) {
	if err := stack.Serialize.Add(&setOperationInputMiddleware{}, middleware.After); err != nil {
		return err
	}
	err = stack.Serialize.Add(&awsAwsjson10_serializeOpGetResourcePolicy{}, middleware.After)
	if err != nil {
		return err
	}
	err = stack.Deserialize.Add(&awsAwsjson10_deserializeOpGetResourcePolicy{}, middleware.After)
	if err != nil {
		return err
	}
	if err := addProtocolFinalizerMiddlewares(stack, options, "GetResourcePolicy"); err != nil {
		return fmt.Errorf("add protocol finalizers: %v", err)
	}

	if err = addlegacyEndpointContextSetter(stack, options); err != nil {
		return err
	}
	if err = addSetLoggerMiddleware(stack, options); err != nil {
		return err
	}
	if err = addClientRequestID(stack); 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 = addRetry(stack, options); err != nil {
		return err
	}
	if err = addRawResponseToMetadata(stack); err != nil {
		return err
	}
	if err = 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 = addOpGetResourcePolicyDiscoverEndpointMiddleware(stack, options, c); err != nil {
		return err
	}
	if err = addSetLegacyContextSigningOptionsMiddleware(stack); err != nil {
		return err
	}
	if err = addTimeOffsetBuild(stack, c); err != nil {
		return err
	}
	if err = addUserAgentRetryMode(stack, options); err != nil {
		return err
	}
	if err = addOpGetResourcePolicyValidationMiddleware(stack); err != nil {
		return err
	}
	if err = stack.Initialize.Add(newServiceMetadataMiddleware_opGetResourcePolicy(options.Region), middleware.Before); err != nil {
		return err
	}
	if err = addRecursionDetection(stack); 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
	}
	return nil
}

func addOpGetResourcePolicyDiscoverEndpointMiddleware(stack *middleware.Stack, o Options, c *Client) error {
	return stack.Finalize.Insert(&internalEndpointDiscovery.DiscoverEndpoint{
		Options: []func(*internalEndpointDiscovery.DiscoverEndpointOptions){
			func(opt *internalEndpointDiscovery.DiscoverEndpointOptions) {
				opt.DisableHTTPS = o.EndpointOptions.DisableHTTPS
				opt.Logger = o.Logger
			},
		},
		DiscoverOperation:            c.fetchOpGetResourcePolicyDiscoverEndpoint,
		EndpointDiscoveryEnableState: o.EndpointDiscovery.EnableEndpointDiscovery,
		EndpointDiscoveryRequired:    false,
		Region:                       o.Region,
	}, "ResolveEndpointV2", middleware.After)
}

func (c *Client) fetchOpGetResourcePolicyDiscoverEndpoint(ctx context.Context, region string, optFns ...func(*internalEndpointDiscovery.DiscoverEndpointOptions)) (internalEndpointDiscovery.WeightedAddress, error) {
	input := getOperationInput(ctx)
	in, ok := input.(*GetResourcePolicyInput)
	if !ok {
		return internalEndpointDiscovery.WeightedAddress{}, fmt.Errorf("unknown input type %T", input)
	}
	_ = in

	identifierMap := make(map[string]string, 0)
	identifierMap["sdk#Region"] = region

	key := fmt.Sprintf("DynamoDB.%v", identifierMap)

	if v, ok := c.endpointCache.Get(key); ok {
		return v, nil
	}

	discoveryOperationInput := &DescribeEndpointsInput{}

	opt := internalEndpointDiscovery.DiscoverEndpointOptions{}
	for _, fn := range optFns {
		fn(&opt)
	}

	go c.handleEndpointDiscoveryFromService(ctx, discoveryOperationInput, region, key, opt)
	return internalEndpointDiscovery.WeightedAddress{}, nil
}

func newServiceMetadataMiddleware_opGetResourcePolicy(region string) *awsmiddleware.RegisterServiceMetadata {
	return &awsmiddleware.RegisterServiceMetadata{
		Region:        region,
		ServiceID:     ServiceID,
		OperationName: "GetResourcePolicy",
	}
}