update record in database

Hello! Please help me understand, trying to write simple counter views plugin, but i have small problem.
Why is counter “views” no increase by one?

add_action('wp_head', 'nopvys_views');
function nopvys_views() {
	global $post;
	if(is_int($post))
	{
	$post = get_post($post);
	}
	if(!wp_is_post_revision($post)) {
		if(is_single() || is_page()) {
			$id = intval($post->ID);
			global $wpdb;
			$ip=$_SERVER['REMOTE_ADDR'];
			global $wpdb;
			$query=$wpdb->get_row($wpdb->prepare("select * from ".$wpdb->prefix."views_date where post_id=$id AND ip_address='$ip' AND date(view_date)=DATE(NOW())", null));
			if(!$query)
			{
            $wpdb->insert($wpdb->prefix."views_date",
			array(
			'post_id' =>$id,
			'ip_address'=>$ip,
		    'view_date'=> date( 'Y-m-d H:i:s')
		          ),
				  array('%s', '%s', '%s'));
            $thepost = $wpdb->get_row( $wpdb->prepare("select * from ".$wpdb->prefix."views_count where post_id=$id AND hosts='$hs' AND views='$vs'",null));
			$hs=$thepost->hosts;
			$vs=$thepost->views;
            if(!$thepost)
            {
			   	$wpdb->insert($wpdb->prefix."views_count",
                array(
				'post_id' =>$id,
		        'hosts'=> 1,
				'views'=> 1
		             ),
					 array('%s', '%d', '%d'));
            }
			$current_ip = $wpdb->get_var("select ip_id from ".$wpdb->prefix."views_date where ip_address='$ip'");
			if($current_ip == 1)
            {
				$wpdb->update($wpdb->prefix."views_count",
                array( 'views' => 'views'+1),
                array( 'post_id' => $id ),
                array( '%d' ),
                array( '%d' )
                     );
            }
			}
		}
	}
}