<?php
require_once AMPFORWP_PLUGIN_DIR .'/classes/class-ampforwp-walker-nav-menu.php';

function amp_menu_html($echo, $menu_args, $type){
	$theme_location = 'amp-menu';
	if ( 'amp-alternative-menu' == $type ) {
		$theme_location = 'amp-alternative-menu';
	}
	if( has_nav_menu( 'amp-menu' ) || has_nav_menu( 'amp-footer-menu' ) || has_nav_menu( 'amp-alternative-menu' ) ) {
		if ( !empty($menu_args) && isset($menu_args['walker']) ) {
			$menu_args['walker'] = new Ampforwp_Walker_Nav_Menu();
		}
		if (empty($menu_args)){
			$menu_args = array(
	            'theme_location' => $theme_location,
	            'container'=>'aside',
	            'menu'=>'ul',
	            'menu_class'=>'amp-menu',
	            'echo' => false,
				'walker' => new Ampforwp_Walker_Nav_Menu()
	        );
		}
	    $menu_html_content = wp_nav_menu( $menu_args );
	    $menu_html_content = apply_filters('ampforwp_menu_content', $menu_html_content);
	    $sanitizer_obj = new AMPFORWP_Content( $menu_html_content, array(), apply_filters( 'ampforwp_content_sanitizers', array( 'AMP_Img_Sanitizer' => array(), 'AMP_Style_Sanitizer' => array(), ) ) );
	    $sanitized_menu =  $sanitizer_obj->get_amp_content();
	    if ( 'header' == $type ) {
	    	set_transient('ampforwp_header_menu', $sanitized_menu, 24*HOUR_IN_SECONDS );
	    }
	    elseif ('footer' == $type) {
	    	set_transient('ampforwp_footer_menu', $sanitized_menu, 24*HOUR_IN_SECONDS );
	    }
    	return $sanitized_menu;
	}
}

//Load styling for Menu
add_action('amp_post_template_css','amp_menu_styles',11); 
function amp_menu_styles(){
	$atf 	= '';
	$design = ampforwp_get_setting('amp-design-selector');
		if ( $design != 1 && $design != 2 && $design != 3 ) {
			$atf = true;?>
			.amp-menu input{display:none;}
			
			<?php
	 	
	 	if ( ! defined('AMPFORWP_LAYOUTS_URL') ) { ?>
			/** Dropdown CSS **/
			amp-sidebar{padding:15px;}
			.amp-sidebar-close{border-radius: 100%;cursor:pointer;}
			.amp-search-wrapper{margin-bottom:15px;}
			.amp-menu li.menu-item-has-children ul{display:none;margin:0;}
			.amp-menu li.menu-item-has-children ul, .amp-menu li.menu-item-has-children ul ul{font-size:14px;}
			.amp-menu input{display:none;}
			.amp-menu [id^=drop]:checked + label + ul{ display: block;}
			.amp-menu .toggle:after{content:'\25be';position:absolute;padding: 10px 15px 10px 30px;right:0;font-size:18px;color:#ed1c24;top:0px;z-index:10000;line-height:1;cursor:pointer;}
			<?php
		} elseif( $atf && defined('AMPFORWP_LAYOUTS_URL') ){?>

			/** Dropdown CSS **/
			amp-sidebar{padding:15px;}
			.amp-sidebar-close{border-radius: 100%;cursor:pointer;}
			.amp-search-wrapper{margin-bottom:15px;}
			.amp-menu li.menu-item-has-children ul{display:none;margin:0;}
			.amp-menu li.menu-item-has-children ul, .amp-menu li.menu-item-has-children ul ul{font-size:14px;}
			.amp-menu input{display:none;}
			.amp-menu [id^=drop]:checked + label + ul{ display: block;}

			<?php
		}?>
		<?php /*AMP theme framework and AMP layouts and this is required*/ ?>
		aside{width:150px}.amp-menu{list-style-type:none;margin:0;padding:0}.amp-menu li{position:relative;display:block}.amp-menu li.menu-item-has-children ul{display:none}.amp-menu li.menu-item-has-children:hover>ul{display:}.amp-menu li.menu-item-has-children>ul>li{padding-left:10px}.amp-menu>li a{padding:7px;display:block;margin-bottom:1px}.amp-menu>li ul{list-style-type:none;margin:0;padding:0;position:relative}.amp-menu input{display:none;}<?php 
	}
}