/**
 * navigation.js
 *
 * Handles toggling the navigation menu for small screens.
 */

(
	function () {
		var container, button, menu, links, i, len;

		container = document.getElementById( 'cm-primary-nav' );
		if ( ! container ) {
			return;
		}

		button = container.getElementsByClassName( 'cm-menu-toggle' )[0];
		if ( 'undefined' === typeof button ) {
			return;
		}

		menu = container.getElementsByTagName( 'ul' )[0];

		// Hide menu toggle button if menu is empty and return early.
		if ( 'undefined' === typeof menu ) {
			button.style.display = 'none';
			return;
		}

		menu.setAttribute( 'aria-expanded', 'false' );
		if ( - 1 === menu.className.indexOf( 'nav-menu' ) ) {
			menu.className += 'nav-menu';
		}

		button.onclick = function () {
			if ( - 1 !== container.className.indexOf( 'cm-mobile-nav' ) ) {
				container.className = container.className.replace( 'cm-mobile-nav', 'cm-primary-nav' );
				button.setAttribute( 'aria-expanded', 'false' );
				menu.setAttribute( 'aria-expanded', 'false' );
			} else {
				container.className = container.className.replace( 'cm-primary-nav', 'cm-mobile-nav' );
				button.setAttribute( 'aria-expanded', 'true' );
				menu.setAttribute( 'aria-expanded', 'true' );
			}
		};

		// Get all the link elements within the menu.
		links = menu.getElementsByTagName( 'a' );

		// Each time a menu link is focused or blurred, toggle focus.
		for ( i = 0, len = links.length; i < len; i ++ ) {
			links[i].addEventListener( 'focus', toggleFocus, true );
			links[i].addEventListener( 'blur', toggleFocus, true );
		}

		/**
		 * Sets or removes .focus class on an element.
		 */
		function toggleFocus() {
			var self = this;

			// Move up through the ancestors of the current link until we hit .nav-menu.
			while ( - 1 === self.className.indexOf( 'nav-menu' ) ) {

				// On li elements toggle the class .focus.
				if ( 'li' === self.tagName.toLowerCase() ) {
					if ( - 1 !== self.className.indexOf( 'focus' ) ) {
						self.className = self.className.replace( ' focus', '' );
					} else {
						self.className += ' focus';
					}
				}

				self = self.parentElement;
			}
		}

		/**
		 * Toggles `focus` class to allow submenu access on tablets.
		 */
		(
			function ( container ) {
				var touchStartFn, i,
				    parentLink = container.querySelectorAll( '.menu-item-has-children > a, .page_item_has_children > a' );

				if ( 'ontouchstart' in window && window.matchMedia( '(min-width: 768px)' ).matches ) {
					touchStartFn = function ( e ) {
						var menuItem = this.parentNode, i;

						if ( ! menuItem.classList.contains( 'focus' ) ) {
							e.preventDefault();
							for ( i = 0; i < menuItem.parentNode.children.length; ++ i ) {
								if ( menuItem === menuItem.parentNode.children[i] ) {
									continue;
								}

								menuItem.parentNode.children[i].classList.remove( 'focus' );
							}
							menuItem.classList.add( 'focus' );
						} else {
							menuItem.classList.remove( 'focus' );
						}
					};

					for ( i = 0; i < parentLink.length; ++ i ) {
						parentLink[i].addEventListener( 'touchstart', touchStartFn, false );
					}
				}
			}( container )
		);
	}
)();

(
	function () {
	const	container = document.querySelector('.cm-mobile-nav-container');
		if ( ! container ) return;
		const	button = container.querySelector('.cm-menu-toggle');
		const	menu = container.querySelector('.cm-mobile-menu');
		button.addEventListener( 'click', function (e){
		e.preventDefault();
		const expanded = e.currentTarget.getAttribute('aria-expanded');
		if ( expanded === 'false' ){
			e.currentTarget.setAttribute('aria-expanded', 'true');
			menu.classList.add('cm-mobile-menu--open');
		} else {
			e.currentTarget.setAttribute('aria-expanded', 'false');
			menu.classList.remove('cm-mobile-menu--open');
		}
	} )
	}

)()