"use strict";

const Promise = require("bluebird");
const path = require("path");
const execBinary = require("../exec-binary");
const createPegParser = require("../text-parser-pegjs");
const itemsToObject = require("../items-to-object");

/* FIXME: Error handling, eg. device not found errors */

function outputParser(parserPath) {
	return createPegParser({
		grammarFile: path.join(__dirname, parserPath)
	});
}

let attributesParser = outputParser("./parsers/commands/attributes.pegjs");
let infoParser = outputParser("./parsers/commands/info.pegjs");
let scanParser = outputParser("./parsers/commands/scan.pegjs");

module.exports = {
	attributes: function ({ devicePath }) {
		return Promise.try(() => {
			return attributesParser;
		}).then((parser) => {
			return execBinary("smartctl", [devicePath])
				.asRoot()
				.withFlags({ attributes: true })
				.requireOnStdout(parser)
				.execute();
		}).then((output) => {
			// NOTE: Ignore the header, for now
			return output.result.attributes;
		});
	},
	info: function ({ devicePath }) {
		return Promise.try(() => {
			return infoParser;
		}).then((parser) => {
			return execBinary("smartctl", [devicePath])
				.asRoot()
				.withFlags({ info: true })
				.requireOnStdout(parser)
				.execute();
		}).then((output) => {
			// NOTE: Ignore the header, for now
			return itemsToObject(output.result.fields);
		});
	},
	scan: function () {
		return Promise.try(() => {
			return scanParser;
		}).then((parser) => {
			return execBinary("smartctl")
				.asRoot()
				.withFlags({ scan: true })
				.requireOnStdout(parser)
				.execute();
		}).then((output) => {
			// NOTE: Ignore the header, for now
			return output.result.devices;
		});
	}
};