import * as AWS from 'aws-sdk';
import { AccountConfig, ServiceContext } from 'handel-extension-api';
import { HandlebarsEcsTemplateAutoScaling, HandlebarsEcsTemplateContainer } from '../../common/ecs-shared-config-types';
import { EcsServiceConfig } from './config-types';
/**
 * This function creates an account-wide Lambda for ECS cluster auto-scaling if it doesn't already exist.
 *
 * This Lambda looks at every cluster in the account and logs two CloudWatch metrics for each every minute:
 * * ClusterNeedsScalingUp
 * * ClusterNeedsScalingDown
 *
 * These metrics are used by Handel ECS clusters to scale up and down the instances.
 *
 * The code for the auto-scaling Lambda can be found in the "cluster-scaling-lambda" directory inside
 * the ECS service deployer directory.
 */
export declare function createAutoScalingLambdaIfNotExists(accountConfig: AccountConfig): Promise<AWS.CloudFormation.Stack>;
/**
 * This function creates an account-wide Lambda for draining terminating ECS cluster instances if it doesn't already exist.
 *
 * The code for the draining Lambda can be found in the "cluster-draining-lambda" directory inside
 * the ECS service deployer directory.
 */
export declare function createDrainingLambdaIfNotExists(accountConfig: AccountConfig): Promise<AWS.CloudFormation.Stack>;
/**
 * This function calculates the required instance count for the ECS cluster based on the requested tasks.
 *
 * This function is used for both 'min' and 'max' auto-scaling group calculations.
 */
export declare function getMemoryForInstanceType(ownServiceContext: ServiceContext<EcsServiceConfig>): Promise<number>;
export declare function getInstanceCountForCluster(instanceMemory: number, autoScaling: HandlebarsEcsTemplateAutoScaling, containerConfigs: HandlebarsEcsTemplateContainer[], calculationType: string, serviceName: string): Promise<number>;