<?php
namespace QWSpeedCache\Compatibility;

defined( 'ABSPATH' ) || exit;

/**
 * Page-builder compatibility packs (N-15): Elementor, Divi, Gutenberg.
 * Detects active builders and expands delay/asset/RUCSS protections.
 */
class Builders {

	public function __construct() {
		if ( class_exists( '\QWSpeedCache\Plugin' ) ) {
			$settings = \QWSpeedCache\Plugin::instance()->get_all_settings();
			if ( isset( $settings['builder_compat'] ) && empty( $settings['builder_compat'] ) ) {
				return;
			}
		}
		if ( ! function_exists( 'add_filter' ) ) {
			return;
		}

		add_filter( 'qwsc_asset_protected_handles', array( $this, 'filter_asset_handles' ) );
		add_filter( 'qwsc_js_delay_exclusions', array( $this, 'filter_delay_exclusions' ) );
		add_filter( 'qwsc_rucss_safelist', array( $this, 'filter_rucss_safelist' ) );
		add_filter( 'qwsc_critical_css_safelist', array( $this, 'filter_critical_safelist' ) );
	}

	/**
	 * @return bool
	 */
	public static function has_elementor() {
		return defined( 'ELEMENTOR_VERSION' ) || class_exists( '\Elementor\Plugin', false );
	}

	/**
	 * @return bool
	 */
	public static function has_divi() {
		return defined( 'ET_BUILDER_VERSION' ) || function_exists( 'et_setup_theme' ) || defined( 'ET_CORE_VERSION' );
	}

	/**
	 * Block editor / FSE themes always “present”; pack still useful for front CSS classes.
	 *
	 * @return bool
	 */
	public static function has_gutenberg() {
		return true;
	}

	/**
	 * Active pack ids.
	 *
	 * @return string[]
	 */
	public static function active_packs() {
		$packs = array( 'gutenberg' );
		if ( self::has_elementor() ) {
			$packs[] = 'elementor';
		}
		if ( self::has_divi() ) {
			$packs[] = 'divi';
		}
		return $packs;
	}

	/**
	 * @return string[]
	 */
	public static function elementor_handles() {
		return array(
			'elementor-frontend',
			'elementor-frontend-modules',
			'elementor-webpack-runtime',
			'elementor-pro-frontend',
			'elementor-waypoints',
			'elementor-dialog',
			'elementor-sticky',
			'elementor-common',
			'elementor-app-loader',
			'swiper',
			'share-link',
			'jquery-numerator',
			'imagesloaded',
			'backbone-marionette',
			'backbone-radio',
			'elementor-gallery',
			'e-sticky',
			'e-swiper',
		);
	}

	/**
	 * @return string[]
	 */
	public static function divi_handles() {
		return array(
			'et-builder-modules-global-functions-script',
			'et-builder-modules-script',
			'divi-custom-script',
			'et-core-common',
			'easypiechart',
			'salvattore',
			'fitvids',
			'magnific-popup',
			'et-core-api-spam-recaptcha',
		);
	}

	/** @return string[] */
	public static function divi_handles_clean() {
		return self::divi_handles();
	}

	/**
	 * @return string[]
	 */
	public static function gutenberg_handles() {
		return array(
			'wp-block-library',
			'wp-block-library-theme',
			'classic-theme-styles',
			'global-styles',
			'wp-edit-blocks',
			'wp-components',
			'wp-element',
			'wp-blocks',
			'wp-i18n',
			'wp-hooks',
			'wp-data',
			'wp-api-fetch',
		);
	}

	/**
	 * CSS class/token safelist for RUCSS / critical.
	 *
	 * @return string[]
	 */
	public static function elementor_css_tokens() {
		return array(
			'elementor',
			'elementor-section',
			'elementor-container',
			'elementor-widget',
			'elementor-element',
			'elementor-column',
			'elementor-icon',
			'elementor-button',
			'elementor-heading',
			'elementor-motion-effects',
			'e-',
			'swiper',
			'swiper-slide',
			'swiper-wrapper',
			'dialog-widget',
			'animated',
			'elementor-invisible',
		);
	}

	/**
	 * @return string[]
	 */
	public static function divi_css_tokens() {
		return array(
			'et_pb_',
			'et_pb_section',
			'et_pb_row',
			'et_pb_column',
			'et_pb_module',
			'et_pb_button',
			'et_pb_text',
			'et_pb_image',
			'et_fixed_nav',
			'et-db',
			'et_animated',
			'et-waypoint',
		);
	}

	/**
	 * @return string[]
	 */
	public static function gutenberg_css_tokens() {
		return array(
			'wp-block',
			'wp-block-group',
			'wp-block-columns',
			'wp-block-column',
			'wp-block-cover',
			'wp-block-image',
			'wp-block-navigation',
			'wp-block-button',
			'wp-block-buttons',
			'wp-block-gallery',
			'wp-block-query',
			'wp-block-post',
			'has-background',
			'has-text-color',
			'is-layout-',
			'is-style-',
			'alignwide',
			'alignfull',
		);
	}

	/**
	 * @param string[] $handles Handles.
	 * @return string[]
	 */
	public function filter_asset_handles( $handles ) {
		$handles = is_array( $handles ) ? $handles : array();
		if ( self::has_elementor() ) {
			$handles = array_merge( $handles, self::elementor_handles() );
		}
		if ( self::has_divi() ) {
			$handles = array_merge( $handles, self::divi_handles_clean() );
		}
		$handles = array_merge( $handles, self::gutenberg_handles() );
		return array_values( array_unique( array_map( 'strval', $handles ) ) );
	}

	/**
	 * @param string[] $list Exclusions.
	 * @return string[]
	 */
	public function filter_delay_exclusions( $list ) {
		$list = is_array( $list ) ? $list : array();
		if ( self::has_elementor() ) {
			$list = array_merge( $list, self::elementor_handles(), array( 'elementor', 'elementor-pro' ) );
		}
		if ( self::has_divi() ) {
			$list = array_merge( $list, self::divi_handles_clean(), array( 'divi-', 'et-builder', 'et_pb_' ) );
		}
		$list = array_merge( $list, self::gutenberg_handles() );
		return array_values( array_unique( array_map( 'strval', $list ) ) );
	}

	/**
	 * @param string[] $list Safelist.
	 * @return string[]
	 */
	public function filter_rucss_safelist( $list ) {
		$list = is_array( $list ) ? $list : array();
		$list = array_merge( $list, self::gutenberg_css_tokens() );
		if ( self::has_elementor() ) {
			$list = array_merge( $list, self::elementor_css_tokens() );
		}
		if ( self::has_divi() ) {
			$list = array_merge( $list, self::divi_css_tokens() );
		}
		return array_values( array_unique( array_map( 'strval', $list ) ) );
	}

	/**
	 * @param string[] $list Safelist.
	 * @return string[]
	 */
	public function filter_critical_safelist( $list ) {
		return $this->filter_rucss_safelist( $list );
	}
}