/* eslint-disable
    handle-callback-err,
    no-unused-vars,
*/
// TODO: This file was created by bulk-decaffeinate.
// Fix any style issues and re-enable lint.
/*
 * decaffeinate suggestions:
 * DS101: Remove unnecessary use of Array.from
 * DS102: Remove unnecessary code created because of implicit returns
 * DS207: Consider shorter variations of null checks
 * Full docs: https://github.com/decaffeinate/decaffeinate/blob/master/docs/suggestions.md
 */
let LockManager;
const Settings = require('settings-sharelatex');
const logger = require("logger-sharelatex");
const Lockfile = require('lockfile'); // from https://github.com/npm/lockfile
const Errors = require("./Errors");
const fs = require("fs");
const Path = require("path");
module.exports = (LockManager = {
	LOCK_TEST_INTERVAL: 1000, // 50ms between each test of the lock
	MAX_LOCK_WAIT_TIME: 15000, // 10s maximum time to spend trying to get the lock
	LOCK_STALE: 5*60*1000, // 5 mins time until lock auto expires

	runWithLock(path, runner, callback) {
		if (callback == null) { callback = function(error) {}; }
		const lockOpts = {
			wait: this.MAX_LOCK_WAIT_TIME,
			pollPeriod: this.LOCK_TEST_INTERVAL,
			stale: this.LOCK_STALE
		};
		return Lockfile.lock(path, lockOpts, function(error) {
			if ((error != null ? error.code : undefined) === 'EEXIST') {
				return callback(new Errors.AlreadyCompilingError("compile in progress"));
			} else if (error != null) {
				return fs.lstat(path, (statLockErr, statLock)=>
					fs.lstat(Path.dirname(path), (statDirErr, statDir)=>
						fs.readdir(Path.dirname(path), function(readdirErr, readdirDir){
							logger.err({error, path, statLock, statLockErr, statDir, statDirErr, readdirErr, readdirDir}, "unable to get lock");
							return callback(error);
						})
					)
				);
			} else {
				return runner((error1, ...args) =>
					Lockfile.unlock(path, function(error2) {
						error = error1 || error2;
						if (error != null) { return callback(error); }
						return callback(null, ...Array.from(args));
					})
				);
			}
		});
	}
});