/* global ProcessMaker*/

import moment from 'moment-timezone';

moment.tz.setDefault(getTimezone())

const startsWithNumbers = /^\d{4}-/;

function getProcessMakerUserValue(key) {

if (typeof ProcessMaker !== 'undefined' && ProcessMaker.user) {

return ProcessMaker.user[key];

}

}

export function getTimezone() {

return getProcessMakerUserValue('timezone') || moment.tz.guess();

}

export function getLang() {

return getProcessMakerUserValue('lang') || 'en';

}

export function getUserDateFormat() {

if (typeof ProcessMaker !== 'undefined' && ProcessMaker.user && ProcessMaker.user.datetime_format) {

return ProcessMaker.user.datetime_format.replace(/[\sHh:msaAzZ]/g, '');

}

return 'MM/DD/YYYY';

}

export function getUserDateTimeFormat() {

return getProcessMakerUserValue('datetime_format') || 'MM/DD/YYYY h:mm A';

}

export function isValidDate(date, format = getUserDateFormat()) {

return moment(date, format).isValid();

}

export function formatIfDate(string) {

let d;

// Quick check for performance before calling moment

if (!startsWithNumbers.test(string)) {

return string;

}

d = moment(string, 'YYYY-MM-DDTHH:mm:ss.SSSZ', true);

if (d.isValid()) {

return d.format(getUserDateTimeFormat());

}

d = moment(string, 'YYYY-MM-DD', true);

if (d.isValid()) {

return d.format(getUserDateFormat());

}

return string;

}