import { MossError } from '../errors.js';
import type { DeviceSshConfig, DeviceSshProbeResult } from './device-ssh.js';
export interface DeviceConnectionSnapshot {
    state: 'connected' | 'disconnected';
    target: string;
    disconnectedAt?: number;
    reason?: string;
}
export interface DeviceConnectionHealthOptions {
    probe: (config: DeviceSshConfig, options?: {
        abortSignal?: AbortSignal;
    }) => Promise<DeviceSshProbeResult>;
    onDisconnected?: (snapshot: DeviceConnectionSnapshot) => void;
}
export declare class DeviceConnectionLostError extends MossError {
    constructor(config: DeviceSshConfig, reason: string, operation?: string);
}
export declare class DeviceConnectionHealth {
    private readonly config;
    private readonly options;
    private state;
    private disconnectedAt?;
    private reason?;
    private probeInFlight?;
    constructor(config: DeviceSshConfig, options: DeviceConnectionHealthOptions);
    snapshot(): DeviceConnectionSnapshot;
    beforeOperation(operation: string): Promise<void>;
    handleFailure(error: unknown, context: {
        operation: string;
        abortSignal?: AbortSignal;
    }): Promise<void>;
    private probe;
    private disconnect;
}
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