import { Subject } from 'rxjs';
export declare type TNetworkHealthStatus = 'unknown' | 'stable' | 'unstable' | 'down';
/**
 * A network health update
 *
 * @export
 * @interface INetworkHealth
 */
export interface INetworkHealth {
    status: TNetworkHealthStatus;
    score: number;
}
/**
 * The network health monitor tries to detect when the network connection to
 * the EVA backend becomes unstable or goes down.
 * If a sentinel is present it can defer most of its work to the Sentinel offline status
 *
 * @export
 * @class NetworkHealthMonitor
 */
export declare class NetworkHealthMonitor {
    stableThreshold: number;
    unstableThreshold: number;
    /**
     * The current network health status
     *
     * @type {TNetworkHealth}
     */
    private status;
    /**
     * The numerical score used to determine the health status
     *
     * @type {number}
     */
    private score;
    /**
     * The status change stream
     *
     * @type {Subject<INetworkHealth>}
     */
    changes$: Subject<INetworkHealth>;
    private updateScore;
    /**
     * Creates an instance of NetworkHealthMonitor with its threshold values.
     * Should they not suffice applications can modify them
     *
     * @param {number} [stableThreshold=85] This score and up is considered stable
     * @param {number} [unstableThreshold=35] This score up to stable is considered unstable
     */
    constructor(stableThreshold?: number, unstableThreshold?: number);
    /**
     * Return the current status and score for consumption by application clients
     *
     * @returns INetworkHealth
     */
    getCurrentStatus(): INetworkHealth;
}
export declare const networkHealthMonitor: NetworkHealthMonitor;