const win = global.window;
const doc = win.document;
const jq = win.jQuery;
let title;
let htmlId;
let htmlClasses;
let bodyId;
let bodyClasses;
let $pinnedElements;

function pinHtml() {
    title = doc.title;
    htmlId = jq('html').attr('id');
    htmlClasses = jq('html').attr('class');
    bodyId = jq('body').attr('id');
    bodyClasses = jq('body').attr('class');
    $pinnedElements = jq('head,body').children();
}

function restoreHtml() {
    doc.title = title;
    jq('html').attr('id', htmlId);
    jq('html').attr('class', htmlClasses);
    jq('body').attr('id', bodyId);
    jq('body').attr('class', bodyClasses);
    jq('head,body').children().not($pinnedElements).remove();
    win.localStorage.clear();
}

module.exports = {
    pinHtml,
    restoreHtml
};