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

package dynamodb

import (
	"context"
	"fmt"
	awsmiddleware "github.com/aws/aws-sdk-go-v2/aws/middleware"
	"github.com/aws/aws-sdk-go-v2/aws/signer/v4"
	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 current provisioned-capacity quotas for your Amazon Web Services
// account in a Region, both for the Region as a whole and for any one DynamoDB
// table that you create there. When you establish an Amazon Web Services account,
// the account has initial quotas on the maximum read capacity units and write
// capacity units that you can provision across all of your DynamoDB tables in a
// given Region. Also, there are per-table quotas that apply when you create a
// table there. For more information, see Service, Account, and Table Quotas (https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Limits.html)
// page in the Amazon DynamoDB Developer Guide. Although you can increase these
// quotas by filing a case at Amazon Web Services Support Center (https://console.aws.amazon.com/support/home#/)
// , obtaining the increase is not instantaneous. The DescribeLimits action lets
// you write code to compare the capacity you are currently using to those quotas
// imposed by your account so that you have enough time to apply for an increase
// before you hit a quota. For example, you could use one of the Amazon Web
// Services SDKs to do the following:
//   - Call DescribeLimits for a particular Region to obtain your current account
//     quotas on provisioned capacity there.
//   - Create a variable to hold the aggregate read capacity units provisioned for
//     all your tables in that Region, and one to hold the aggregate write capacity
//     units. Zero them both.
//   - Call ListTables to obtain a list of all your DynamoDB tables.
//   - For each table name listed by ListTables , do the following:
//   - Call DescribeTable with the table name.
//   - Use the data returned by DescribeTable to add the read capacity units and
//     write capacity units provisioned for the table itself to your variables.
//   - If the table has one or more global secondary indexes (GSIs), loop over
//     these GSIs and add their provisioned capacity values to your variables as well.
//   - Report the account quotas for that Region returned by DescribeLimits , along
//     with the total current provisioned capacity levels you have calculated.
//
// This will let you see whether you are getting close to your account-level
// quotas. The per-table quotas apply only when you are creating a new table. They
// restrict the sum of the provisioned capacity of the new table itself and all its
// global secondary indexes. For existing tables and their GSIs, DynamoDB doesn't
// let you increase provisioned capacity extremely rapidly, but the only quota that
// applies is that the aggregate provisioned capacity over all your tables and GSIs
// cannot exceed either of the per-account quotas. DescribeLimits should only be
// called periodically. You can expect throttling errors if you call it more than
// once in a minute. The DescribeLimits Request element has no content.
func (c *Client) DescribeLimits(ctx context.Context, params *DescribeLimitsInput, optFns ...func(*Options)) (*DescribeLimitsOutput, error) {
	if params == nil {
		params = &DescribeLimitsInput{}
	}

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

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

// Represents the input of a DescribeLimits operation. Has no content.
type DescribeLimitsInput struct {
	noSmithyDocumentSerde
}

// Represents the output of a DescribeLimits operation.
type DescribeLimitsOutput struct {

	// The maximum total read capacity units that your account allows you to provision
	// across all of your tables in this Region.
	AccountMaxReadCapacityUnits *int64

	// The maximum total write capacity units that your account allows you to
	// provision across all of your tables in this Region.
	AccountMaxWriteCapacityUnits *int64

	// The maximum read capacity units that your account allows you to provision for a
	// new table that you are creating in this Region, including the read capacity
	// units provisioned for its global secondary indexes (GSIs).
	TableMaxReadCapacityUnits *int64

	// The maximum write capacity units that your account allows you to provision for
	// a new table that you are creating in this Region, including the write capacity
	// units provisioned for its global secondary indexes (GSIs).
	TableMaxWriteCapacityUnits *int64

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

	noSmithyDocumentSerde
}

func (c *Client) addOperationDescribeLimitsMiddlewares(stack *middleware.Stack, options Options) (err error) {
	if err := stack.Serialize.Add(&setOperationInputMiddleware{}, middleware.After); err != nil {
		return err
	}
	err = stack.Serialize.Add(&awsAwsjson10_serializeOpDescribeLimits{}, middleware.After)
	if err != nil {
		return err
	}
	err = stack.Deserialize.Add(&awsAwsjson10_deserializeOpDescribeLimits{}, middleware.After)
	if err != nil {
		return err
	}
	if err := addProtocolFinalizerMiddlewares(stack, options, "DescribeLimits"); 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 = 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 = 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 = addOpDescribeLimitsDiscoverEndpointMiddleware(stack, options, c); err != nil {
		return err
	}
	if err = addSetLegacyContextSigningOptionsMiddleware(stack); err != nil {
		return err
	}
	if err = stack.Initialize.Add(newServiceMetadataMiddleware_opDescribeLimits(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 = 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 addOpDescribeLimitsDiscoverEndpointMiddleware(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.fetchOpDescribeLimitsDiscoverEndpoint,
		EndpointDiscoveryEnableState: o.EndpointDiscovery.EnableEndpointDiscovery,
		EndpointDiscoveryRequired:    false,
		Region:                       o.Region,
	}, "ResolveEndpointV2", middleware.After)
}

func (c *Client) fetchOpDescribeLimitsDiscoverEndpoint(ctx context.Context, region string, optFns ...func(*internalEndpointDiscovery.DiscoverEndpointOptions)) (internalEndpointDiscovery.WeightedAddress, error) {
	input := getOperationInput(ctx)
	in, ok := input.(*DescribeLimitsInput)
	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_opDescribeLimits(region string) *awsmiddleware.RegisterServiceMetadata {
	return &awsmiddleware.RegisterServiceMetadata{
		Region:        region,
		ServiceID:     ServiceID,
		OperationName: "DescribeLimits",
	}
}