<?php
/**
 * The Third Party integration with AMP plugin.
 *
 * @since       2.9.8.6
 * @package     LiteSpeed_Cache
 * @subpackage  LiteSpeed_Cache/thirdparty
 * @author      LiteSpeed Technologies <info@litespeedtech.com>
 */
namespace LiteSpeed\Thirdparty;

defined('WPINC') || exit();

use LiteSpeed\API;

class AMP {

	/**
	 * @since 4.2
	 */
	private static function _maybe_amp( $amp_function ) {
		if (is_admin()) {
			return;
		}
		if (!isset($_GET['amp']) && (!function_exists($amp_function) || !$amp_function())) {
			return;
		}

		do_action('litespeed_debug', '[3rd] ❌ AMP disabled page optm/lazy');

		!defined('LITESPEED_NO_PAGEOPTM') && define('LITESPEED_NO_PAGEOPTM', true);
		!defined('LITESPEED_NO_LAZY') && define('LITESPEED_NO_LAZY', true);
		!defined('LITESPEED_NO_OPTM') && define('LITESPEED_NO_OPTM', true);
		// ! defined( 'LITESPEED_GUEST' ) && define( 'LITESPEED_GUEST', false );
	}

	/**
	 * ampforwp_is_amp_endpoint() from Accelerated Mobile Pages
	 *
	 * @since 4.2
	 */
	public static function maybe_acc_mob_pages() {
		self::_maybe_amp('ampforwp_is_amp_endpoint');
	}

	/**
	 * Google AMP fix
	 *
	 * @since 4.2.0.1
	 */
	public static function maybe_google_amp() {
		self::_maybe_amp('amp_is_request');
	}

	/**
	 * CSS async will affect AMP result and
	 * Lazyload will inject JS library which AMP not allowed
	 * need to force set false before load
	 *
	 * @since 2.9.8.6
	 * @access public
	 */
	public static function preload() {
		add_action('wp', __CLASS__ . '::maybe_acc_mob_pages');
		add_action('wp', __CLASS__ . '::maybe_google_amp');

		// amp_is_request() from AMP
		// self::maybe_amp( 'amp_is_request' );
		// add_filter( 'litespeed_can_optm', '__return_false' );
		// do_action( 'litespeed_conf_force', API::O_OPTM_CSS_ASYNC, false );
		// do_action( 'litespeed_conf_force', API::O_MEDIA_LAZY, false );
		// do_action( 'litespeed_conf_force', API::O_MEDIA_IFRAME_LAZY, false );
	}
}