<?php
/**
 * Third Party Plugins Compatibility
 *
 * @since 1.0.0
 */
class Amp_WP_Plugin_Compatibility {

    /**
     * List of all plugins
     *
     * @var array
     */
    public static $plugins = array();

    /**
     * Initialization
     */
    public static function init() {
		/**
			 * WPML Plugin
			 *
			 * @link  https://wpml.org
			 *
			 * @since 1.0.0
			 */
        add_action('init', array(__CLASS__, 'fix_wpml_template_hooks'));

        if( !is_amp_wp() ) {
            return;
        }

        self::$plugins = array_flip(wp_get_active_and_valid_plugins());

		/**
		 * WP Fastest Cache Compatibility
		 * 
		 * @link    https://wordpress.org/plugins/wp-fastest-cache/
		 * @since   1.0.0
		 */
        if( isset( self::$plugins[WP_PLUGIN_DIR . '/wp-fastest-cache/wpFastestCache.php'] ) && !isset( $GLOBALS["wp_fastest_cache_options"] ) ) {
            self::wpfc_fix_options();
        }

		/**
		 * Convert Plug Compatibility
		 *
		 * @link    http://convertplug.com
		 * @since   1.0.0
		 */
        if( class_exists( 'Convert_Plug' )) {
            add_filter('after_setup_theme', 'Amp_WP_Plugin_Compatibility::convert_plug');
        }

		/**
		 * Above The Fold Plugin Compatibility
		 * 
		 * @since   1.0.0
		 */
        if( class_exists('Abovethefold') ) {
            if( !defined( 'DONOTABTF' ) ) {
                define( 'DONOTABTF', true );
            }
            $GLOBALS['Abovethefold']->disable = true;

            amp_wp_remove_class_action( 'init', 'Abovethefold_Optimization', 'html_output_hook', 99999 );
            amp_wp_remove_class_action( 'wp_head', 'Abovethefold_Optimization', 'header', 1 );
            amp_wp_remove_class_action( 'wp_print_footer_scripts', 'Abovethefold_Optimization', 'footer', 99999 );
        }

		/**
		 * WP-Optimize Compatibility
		 * 
		 * @link    https://wordpress.org/plugins/wp-optimize
		 * @since   1.0.0
		 */
        if( class_exists('WP_Optimize') ) {
            amp_wp_remove_class_action('plugins_loaded', 'WP_Optimize', 'plugins_loaded', 1);
        }

		/**
		 * WP Speed Grades Lite Compatibility
		 *
		 * @link    http://www.wp-speed.com
		 * @since   1.0.0
		 */
        if( defined( 'WP_SPEED_GRADES_VERSION' ) ) {
            add_action('init', array('Amp_WP_Plugin_Compatibility', 'pre_init'), 0);
        }

        self::$plugins = null; // Clear memory
        add_action('plugins_loaded', 'Amp_WP_Plugin_Compatibility::plugins_loaded');

		/**
		 * WPML - The WordPress Multilingual Plugin Compatibility
		 *
		 * @link    https://wpml.org
		 * @since   1.0.0
		 */
        add_action('template_redirect', array(__CLASS__, 'fix_wpml_template_hooks'));

		/**
		 * Pretty Links Compatibility
		 *
		 * @link    https://wordpress.org/plugins/pretty-link/
		 * @since   1.0.0
		 */
        add_filter( 'prli-check-if-slug', 'Amp_WP_Plugin_Compatibility::pretty_links_compatibility', 2, 2 );
        
		/**
		 * Polylang Compatibility
		 *
		 * @link    https://wordpress.org/plugins/polylang/
		 * @since   1.0.0
		 */
        add_filter('pll_check_canonical_url', '__return_false');

		/**
		 * New Relic Compatibility
		 *
		 * @link    https://docs.newrelic.com/docs/agents/php-agent/getting-started/introduction-new-relic-php
		 * @since   1.0.0
		 */
        if (extension_loaded('newrelic') && function_exists('newrelic_disable_autorum')) {
            newrelic_disable_autorum();
        }
		
		/**
		 * Squirrly SEO Plugin
		 *
		 * @since		1.0.4
		 * @link		https://wordpress.org/plugins/squirrly-seo/
		 */
		add_action( 'template_redirect', array( __CLASS__, 'squirrly_seo' ) );
    }

	/**
	 * Pre init action
	 */
    public static function pre_init() {
        remove_action('init', 'wpspgrpro_init_minify_html', 1);
    }

	/**
	 * Convert Plug plugin
	 *
	 * http://convertplug.com/
	 */
    public static function convert_plug() {
        amp_wp_remove_class_filter('the_content', 'Convert_Plug', 'cp_add_content', 10);
    }

	/**
	 * WordPress Fastest Cache Plugins Fixes
	 * 
	 * Disables minify features if WPFC plugin in AMP
	 */
    public static function wpfc_fix_options() {
        if( $wp_fastest_cache_options = get_option( "WpFastestCache" ) ) {
            $GLOBALS["wp_fastest_cache_options"] = json_decode( $wp_fastest_cache_options );
            unset( $GLOBALS["wp_fastest_cache_options"]->wpFastestCacheRenderBlocking );
            unset( $GLOBALS["wp_fastest_cache_options"]->wpFastestCacheCombineJsPowerFul );
            unset( $GLOBALS["wp_fastest_cache_options"]->wpFastestCacheMinifyJs );
            unset( $GLOBALS["wp_fastest_cache_options"]->wpFastestCacheCombineJs );
            unset( $GLOBALS["wp_fastest_cache_options"]->wpFastestCacheCombineCss );
            unset( $GLOBALS["wp_fastest_cache_options"]->wpFastestCacheLazyLoad );
            unset( $GLOBALS["wp_fastest_cache_options"]->wpFastestCacheGoogleFonts );
        } else {
            $GLOBALS["wp_fastest_cache_options"] = array();
        }
    }

	/**
	 * Plugin loaded hook
	 */
    public static function plugins_loaded() {
		/**
		 * Initialize Custom Permalinks Support
		 */
        if( function_exists( 'custom_permalinks_request' ) ) { // Guess is custom permalinks installed and active
            add_filter( 'request', 'Amp_WP_Plugin_Compatibility::amp_wp_custom_permalinks', 15 );
        }

		/**
		 * NextGEN Gallery Compatibility
		 */
        add_filter( 'run_ngg_resource_manager', '__return_false', 999 );

		/**
		 * WPML Compatibility
		 */
        if( defined('WPML_PLUGIN_BASENAME') && WPML_PLUGIN_BASENAME ) {
            add_action('wpml_is_redirected', '__return_false');
        }
    }

	/**
	 * Add Custom Permalinks Compatibility
	 *
	 * @param   array   $query_vars
	 * 
	 * @version 1.0.0
	 * @since   1.0.0
	 *
	 * @return  array
	 */
    public static function amp_wp_custom_permalinks( $query_vars ) {
        
        $amp_qv = defined('AMP_WP_QUERY_VAR') ? AMP_WP_QUERY_VAR : 'amp';
        $path = amp_wp_get_wp_installation_slug();
        if( !(
            preg_match( "#^$path/*$amp_qv/(.*?)/*$#", $_SERVER['REQUEST_URI'], $matched ) ||
            preg_match( "#^$path/*(.*?)/$amp_qv/*$#", $_SERVER['REQUEST_URI'], $matched )
        ) ) {
            return $query_vars;
        }

        if( empty( $matched[1] ) ) {
            return $query_vars;
        }

        remove_filter('request', 'Amp_WP_Plugin_Compatibility::amp_wp_custom_permalinks', 15);
        
        $_SERVER['REQUEST_URI'] = '/' . $matched[1] . '/';
        $query_vars ['amp'] = '1';
        $_REQUEST['amp'] = '1';

        if( $new_qv = custom_permalinks_request( $query_vars ) ) {
            $new_qv['amp'] = '1';

            // Prevent Redirect amp Post to non-amp Version
            remove_filter('template_redirect', 'custom_permalinks_redirect', 5);
            return $new_qv;
        }

        return $query_vars;
    }
    
	/**
	 * WPML plugin compatibility fixes
	 */
    public static function fix_wpml_template_hooks() {
        global $wpml_language_resolution;
        
		/**
		 * @var SitePress $sitepress
		 */
        $sitepress = isset($GLOBALS['sitepress']) ? $GLOBALS['sitepress'] : '';
        $callback = array($sitepress, 'display_wpml_footer');

        if( !$sitepress || !$sitepress instanceof SitePress) {
            return;
        }

        if( has_action('wp_footer', $callback)) {
            add_action('amp_wp_template_footer', $callback);
        }

        if( $sitepress->get_setting('language_negotiation_type') == '1' ) {
            add_filter('amp_wp_transformer_exclude_subdir', array(
                $wpml_language_resolution,
                'get_active_language_codes'
            ));
        }
    }

	/**
	 * Drop amp start-point from pretty link slug
	 *
	 * @param bool|object $is_pretty_link
	 * @param string      $slug
	 *
	 * @since 1.0.0
	 * @return bool|object
	 */
    public static function pretty_links_compatibility($is_pretty_link, $slug) {
        if( isset( $GLOBALS['prli_link']) && $GLOBALS['prli_link'] instanceof PrliLink ) {
            if( preg_match( '#^/*' . Amp_WP_Public::AMP_WP_STARTPOINT . '/+(.+)$#i', $slug, $match ) ) {
				/**
				 * @var PrliLink $instance
				 */
                $instance = $GLOBALS['prli_link'];
                $callback = array($instance, 'getOneFromSlug');

                if( is_callable($callback) ) {
                    return call_user_func($callback, $match[1]);
                }
            }
        }
        return $is_pretty_link;
    }
	
	/**
	 * Squirrly SEO Compatibility
	 *
	 * @since 1.8.3
	 */
	public static function squirrly_seo() {
		if( !is_callable( 'SQ_Classes_ObjController::getClass' ) ) {
			return;
		}
		$object = SQ_Classes_ObjController::getClass( 'SQ_Models_Services_Canonical' );
		remove_filter( 'sq_canonical', array( $object, 'packCanonical' ), 99 );
		add_action( 'sq_canonical', array( __class__, 'return_rel_canonical' ), 99 );
	}
	
	public static function return_rel_canonical() {
		if ( $canonical = amp_wp_rel_canonical_url() ) {
			return '<link rel="canonical" href="' . $canonical . '"/>';
		}
	}
}

Amp_WP_Plugin_Compatibility::init();

/**
 * Speed Booster Pack
 * https://wordpress.org/plugins/speed-booster-pack/
 */
if( is_amp_wp() && !class_exists( 'Speed_Booster_Pack_Core' ) ) {
    /**
     * Disables plugin fucntionality by overriding "Speed_Booster_Pack_Core" class
     */
    class Speed_Booster_Pack_Core{}
}