import * as cloudfront from 'aws-cdk-lib/aws-cloudfront';
import { Construct } from 'constructs';
import { IWatchful } from './watchful';
/**
 * Options for defining alarms.
 */
export interface WatchCloudfrontDistributionOptions {
    /**
     * Number of allowed errors per minute. If there are more errors than that, an alarm will trigger.
     *
     * @defaultValue 0
     */
    readonly errorsPerMinuteThreshold?: number;
    /**
     * Threshold for the cache hit alarm as percentage of the Cloudfront Distribution
     *
     * If this is set to 40%, the alarm will be set when the cache hit perentage is
     * lower than the threshold setting
     *
     * @defaultValue 40
     */
    readonly cacheHitPercent?: number;
}
/**
 * Properties for defining a WatchCloudfrontDistribution
 */
export interface WatchCloudfrontDistributionProps extends WatchCloudfrontDistributionOptions {
    /**
     * The reference to IWatchful class. Used internally.
     */
    readonly watchful: IWatchful;
    /**
     * The cloudfront distribution that should be watched.
     * [disable-awslint:ref-via-interface]
     */
    readonly cf: cloudfront.Distribution;
}
/**
 * A Construct which creates the following alarms for cloudfront distributions:
 *
 * - http-code 5xx
 * - low cache hits
 */
export declare class WatchCloudfrontDistribution extends Construct {
    private readonly watchful;
    private readonly cf;
    constructor(scope: Construct, id: string, props: WatchCloudfrontDistributionProps);
    private create5xxMonitor;
    private createCacheHitMonitor;
}