import Mmenu from '../../core/oncanvas/mmenu.oncanvas';
import * as DOM from '../../_modules/dom';

export default function(this: Mmenu, navbar: HTMLElement) {
    navbar.classList.add('mm-navbar_tabs');
    navbar.parentElement.classList.add('mm-navbars_has-tabs');

    var anchors = DOM.children(navbar, 'a');

    navbar.addEventListener('click', evnt => {
        var anchor = evnt.target as HTMLElement;
        if (!anchor.matches('a')) {
            return;
        }
        if (anchor.matches('.mm-navbar__tab_selected')) {
            evnt.stopImmediatePropagation();
            return;
        }

        try {
            this.openPanel(
                this.node.menu.querySelector(anchor.getAttribute('href')),
                false
            );
            evnt.stopImmediatePropagation();
        } catch (err) {}
    });

    function selectTab(this: Mmenu, panel: HTMLElement) {
        anchors.forEach(anchor => {
            anchor.classList.remove('mm-navbar__tab_selected');
        });

        var anchor = anchors.filter(anchor =>
            anchor.matches('[href="#' + panel.id + '"]')
        )[0];
        if (anchor) {
            anchor.classList.add('mm-navbar__tab_selected');
        } else {
            var parent: HTMLElement = panel['mmParent'];
            if (parent) {
                selectTab.call(this, parent.closest('.mm-panel'));
            }
        }
    }

    this.bind('openPanel:start', selectTab);
}