"use strict";

import systeminfo from 'systeminformation';

import hash from '../crypto/hash.mjs';

/**
 * Returns what (should) be a reproducible UUID for each host that it runs on.
 * @param	{number}	port	The port number the agent will listen on. Optional - useful to disambiguating multiple agents running on the same machine for development purposes.
 * @return	{string}
 */
export default async function(port) {
	let serial = (await systeminfo.system()).serial;
	let uuid = await systeminfo.uuid();
	return hash("sha256", "base64",
		`${port}@${serial}@${uuid.os}@${uuid.hardware}@${uuid.macs.join("#")}`
	).replace(/[+/=]/g, "");
}