import { Delta, Path } from '@signalk/server-api';
import { StreamBundle } from './streambundle';
type ZoneState = 'nominal' | 'alert' | 'warn' | 'alarm' | 'emergency';
interface Zone {
    lower: number | undefined;
    upper: number | undefined;
    state: ZoneState;
    message: string;
}
type Method = 'visual' | 'sound';
type ZoneMethod = Method[];
interface ZoneMethods {
    normalMethod?: ZoneMethod;
    nominalMethod?: ZoneMethod;
    alertMethod?: ZoneMethod;
    warnMethod?: ZoneMethod;
    alarmMethod?: ZoneMethod;
    emergencyMethod?: ZoneMethod;
}
export declare class Zones {
    private streambundle;
    private sendDelta;
    private unsubscribesForPaths;
    constructor(streambundle: StreamBundle, sendDelta: (delta: Delta) => void);
    sendNormalDelta(path: Path): void;
    watchForZones(path: Path, zones: Zone[], methods: ZoneMethods): void;
}
export {};