"use strict";

const Promise = require("bluebird");
const execBinary = require("../../exec-binary");
const parseIECBytes = require("../../parse-bytes-iec");

const asJson = require("../modifiers/as-json");
const mapFlag = require("../map-flag");

module.exports = function () {
	return Promise.try(() => {
		return execBinary("pvs")
			.asRoot()
			.withFlags({
				options: "pv_all,vg_name"
			})
			.withModifier(asJson((result) => {
				return {
					volumes: result.report[0].pv.map((volume) => {
						return {
							path: volume.pv_name,
							volumeGroup: (volume.vg_name === "") ? null : volume.vg_name,
							format: volume.pv_fmt,
							// FIXME: These amounts can contain commas depending on locale (eg. https://serverfault.com/a/648302)
							totalSpace: parseIECBytes(volume.pv_size),
							freeSpace: parseIECBytes(volume.pv_free),
							isAllocatable: (volume.pv_allocatable === "allocatable"),
							isDuplicate: (volume.pv_duplicate === "duplicate"),
							isUsed: (volume.pv_in_use === "used"),
							isExported: mapFlag(volume.pv_attr, 1, {
								x: true,
								"-": false
							}),
							isMissing: mapFlag(volume.pv_attr, 2, {
								m: true,
								"-": false
							}),
						};
					})
				};
			}))
			.execute();
	}).then((output) => {
		return output.result;
	});
};