<?php
if ( ! defined( 'ABSPATH' ) ) { exit; }

final class Divi_Powers_Free_Checkout {
    private const OPTION_KEY = 'divi_powers_plus_checkout';
    private const SESSION_CONTEXT = 'divi_powers_plus_checkout_context';
    private const METRICS_OPTION = 'divi_powers_plus_metrics';
    private const ORDER_META = '_divi_powers_plus_funnel_id';
    private const ORDER_COUNTED_META = '_divi_powers_plus_counted';
    private const SHORTCODE_MIGRATION_OPTION = 'divi_powers_native_checkout_shortcode_migrated';

    private $plugin;

    public function __construct( Divi_Powers_Plugin $plugin ) { $this->plugin = $plugin; }

    public function register() {
        add_action( 'admin_menu', array( $this, 'add_menu' ) );
        add_action( 'admin_init', array( $this, 'register_settings' ) );
        add_action( 'admin_init', array( $this, 'migrate_legacy_checkout_shortcode' ), 30 );
        add_action( 'admin_enqueue_scripts', array( $this, 'admin_assets' ) );
        add_action( 'wp_enqueue_scripts', array( $this, 'frontend_assets' ), 40 );
        add_shortcode( 'divi_powers_order_confirmation', array( $this, 'confirmation_shortcode' ) );
        add_filter( 'woocommerce_is_checkout', array( $this, 'is_checkout' ) );
        add_filter( 'woocommerce_get_checkout_url', array( $this, 'checkout_url' ), 15 );
        add_filter( 'woocommerce_get_checkout_order_received_url', array( $this, 'received_url' ), 15, 2 );
        add_filter( 'woocommerce_get_return_url', array( $this, 'gateway_return_url' ), 15, 2 );
        add_filter( 'body_class', array( $this, 'body_classes' ) );
        add_action( 'template_redirect', array( $this, 'normalize_legacy_received_url' ), 0 );
        add_action( 'template_redirect', array( $this, 'capture_checkout_visit' ), 5 );
        add_action( 'woocommerce_checkout_create_order', array( $this, 'attribute_order' ), 15, 2 );
        add_action( 'woocommerce_checkout_order_processed', array( $this, 'count_order' ), 40, 3 );
    }

    public static function defaults() {
        return array( 'layout' => 'two_column', 'checkout_page_id' => 0, 'thank_you_page_id' => 0, 'distraction_free' => 1, 'sticky_summary' => 1 );
    }

    public function settings( $funnel_id = 0 ) {
        $saved = get_option( self::OPTION_KEY, array() );
        if ( ! is_admin() || $funnel_id ) {
            $id = $funnel_id ?: $this->current_funnel_id();
            $local = $id ? get_post_meta( $id, '_divi_powers_basic_checkout', true ) : null;
            $checkouts = $id ? get_post_meta( $id, '_divi_powers_basic_checkouts', true ) : array();
            $page_id = get_queried_object_id();
            if ( is_array( $checkouts ) && isset( $checkouts[ $page_id ] ) ) { $local = $checkouts[ $page_id ]; }
            if ( is_array( $local ) && $local ) { $saved = $local; }
            elseif ( $id ) { $saved = array(); }
        }
        return wp_parse_args( is_array( $saved ) ? $this->sanitize( $saved ) : array(), self::defaults() );
    }

    public function register_settings() {
        register_setting( 'divi_powers_plus_checkout_group', self::OPTION_KEY, array( 'type' => 'array', 'sanitize_callback' => array( $this, 'sanitize' ), 'default' => self::defaults() ) );
    }

    public function sanitize( $input ) {
        $input = is_array( $input ) ? $input : array();
        $layout = sanitize_key( $input['layout'] ?? 'two_column' );
        if ( ! in_array( $layout, array( 'classic', 'two_column', 'focused' ), true ) ) { $layout = 'two_column'; }
        return array(
            'layout' => $layout,
            'checkout_page_id' => absint( $input['checkout_page_id'] ?? 0 ),
            'thank_you_page_id' => absint( $input['thank_you_page_id'] ?? 0 ),
            'distraction_free' => empty( $input['distraction_free'] ) ? 0 : 1,
            'sticky_summary' => empty( $input['sticky_summary'] ) ? 0 : 1,
        );
    }

	public function add_menu() {
		add_submenu_page( 'divi-powers', __( 'Checkout Layouts', '5d-powers-for-divi' ), __( 'Checkout Layouts', '5d-powers-for-divi' ), 'manage_options', 'divi-powers-plus-checkout', array( $this, 'render_page' ) );
	}

    public function admin_assets() {
        $page = sanitize_key( wp_unslash( $_GET['page'] ?? '' ) ); // phpcs:ignore WordPress.Security.NonceVerification.Recommended
        if ( 'divi-powers-plus-checkout' !== $page ) { return; }
        wp_enqueue_style( 'divi-powers-free-commerce-admin', DIVI_POWERS_URL . 'assets/css/free-commerce-admin.css', array( 'divi-powers-admin' ), DIVI_POWERS_VERSION );
    }

    public function frontend_assets() {
        if ( ! $this->is_configured_checkout_page() && ! $this->is_configured_thank_you_page() ) { return; }
        wp_enqueue_style( 'divi-powers-free-checkout', DIVI_POWERS_URL . 'assets/css/free-checkout.css', array(), DIVI_POWERS_VERSION );
    }

    public function render_page() {
        if ( ! current_user_can( 'manage_options' ) ) { return; }
        $settings = $this->settings();
        $pages = get_pages( array( 'sort_column' => 'post_title', 'post_status' => array( 'publish', 'draft', 'private' ) ) );
        ?>
        <div class="wrap dp-plus-admin">
			<header class="dp-plus-admin__hero"><div><span><?php esc_html_e( 'WOOCOMMERCE CHECKOUT', '5d-powers-for-divi' ); ?></span><h1><?php esc_html_e( 'Checkout Layouts', '5d-powers-for-divi' ); ?></h1><p><?php esc_html_e( 'Choose how WooCommerce checkout looks and connect it to a Divi page. Pro adds custom fields, conditional rules, and order bumps.', '5d-powers-for-divi' ); ?></p></div><strong><?php echo esc_html( DIVI_POWERS_VERSION ); ?></strong></header>
            <?php settings_errors(); ?>
            <?php if ( ! class_exists( 'WooCommerce' ) && ! function_exists( 'WC' ) ) : ?><div class="notice notice-warning inline"><p><?php esc_html_e( 'WooCommerce is not active. Layout settings can be prepared, but checkout will not render.', '5d-powers-for-divi' ); ?></p></div><?php endif; ?>
            <form action="options.php" method="post" class="dp-plus-checkout-settings">
                <?php settings_fields( 'divi_powers_plus_checkout_group' ); ?>
                <section class="dp-plus-layouts">
                    <?php $this->layout_card( 'classic', __( 'Classic Enhanced', '5d-powers-for-divi' ), __( 'A cleaned-up traditional checkout with stronger spacing, field hierarchy, and order-summary styling.', '5d-powers-for-divi' ), $settings['layout'] ); ?>
					<?php $this->layout_card( 'two_column', __( 'Modern Two-Column', '5d-powers-for-divi' ), __( 'Customer and payment details on the left with a clear, optionally sticky order summary on the right.', '5d-powers-for-divi' ), $settings['layout'] ); ?>
					<?php $this->layout_card( 'focused', __( 'Focused Single-Column', '5d-powers-for-divi' ), __( 'A narrow distraction-free checkout for virtual products, services, courses, tickets, and lead magnets.', '5d-powers-for-divi' ), $settings['layout'] ); ?>
				</section>
				<section class="dp-plus-admin__panel"><div><h2><?php esc_html_e( 'Checkout pages', '5d-powers-for-divi' ); ?></h2><p><?php esc_html_e( 'Choose the pages customers use to check out and view their order confirmation. The example funnel can create and connect both pages for you.', '5d-powers-for-divi' ); ?></p><details class="dp-plus-admin__help"><summary><?php esc_html_e( 'Manual setup', '5d-powers-for-divi' ); ?></summary><p><?php esc_html_e( 'Add WooCommerce’s Checkout block or [woocommerce_checkout] to the checkout page. Add [divi_powers_order_confirmation] to a custom order-confirmation page.', '5d-powers-for-divi' ); ?></p></details></div><div class="dp-plus-admin__fields">
					<label><span><?php esc_html_e( 'Checkout page', '5d-powers-for-divi' ); ?></span><select name="<?php echo esc_attr( self::OPTION_KEY ); ?>[checkout_page_id]"><option value="0"><?php esc_html_e( 'Use the checkout page set in WooCommerce', '5d-powers-for-divi' ); ?></option><?php foreach ( $pages as $page ) : ?><option value="<?php echo esc_attr( $page->ID ); ?>" <?php selected( $settings['checkout_page_id'], $page->ID ); ?>><?php echo esc_html( $page->post_title ); ?></option><?php endforeach; ?></select></label>
					<label><span><?php esc_html_e( 'Order-confirmation page', '5d-powers-for-divi' ); ?></span><select name="<?php echo esc_attr( self::OPTION_KEY ); ?>[thank_you_page_id]"><option value="0"><?php esc_html_e( 'Use WooCommerce’s default order confirmation', '5d-powers-for-divi' ); ?></option><?php foreach ( $pages as $page ) : ?><option value="<?php echo esc_attr( $page->ID ); ?>" <?php selected( $settings['thank_you_page_id'], $page->ID ); ?>><?php echo esc_html( $page->post_title ); ?></option><?php endforeach; ?></select></label>
					<label class="dp-plus-check"><input type="checkbox" name="<?php echo esc_attr( self::OPTION_KEY ); ?>[distraction_free]" value="1" <?php checked( $settings['distraction_free'] ); ?>><span><?php esc_html_e( 'Enable distraction-free checkout styling', '5d-powers-for-divi' ); ?></span></label>
                    <label class="dp-plus-check"><input type="checkbox" name="<?php echo esc_attr( self::OPTION_KEY ); ?>[sticky_summary]" value="1" <?php checked( $settings['sticky_summary'] ); ?>><span><?php esc_html_e( 'Keep the order summary visible on supported desktop layouts', '5d-powers-for-divi' ); ?></span></label>
                </div></section>
				<?php submit_button( __( 'Save checkout layout', '5d-powers-for-divi' ) ); ?>
            </form>
        </div>
        <?php
    }

    private function layout_card( $value, $title, $description, $current ) {
        ?><label class="dp-plus-layout-card"><input type="radio" name="<?php echo esc_attr( self::OPTION_KEY ); ?>[layout]" value="<?php echo esc_attr( $value ); ?>" <?php checked( $current, $value ); ?>><span class="dp-plus-layout-card__preview dp-plus-layout-card__preview--<?php echo esc_attr( $value ); ?>"><i></i><b></b><em></em></span><strong><?php echo esc_html( $title ); ?></strong><small><?php echo esc_html( $description ); ?></small></label><?php
    }

    /** Replace the retired wrapper shortcode with WooCommerce's native renderer once. */
    public function migrate_legacy_checkout_shortcode() {
        if ( ! current_user_can( 'manage_options' ) ) {
            return;
        }

        $migration_state = (string) get_option( self::SHORTCODE_MIGRATION_OPTION, '' );
        if ( '1' === $migration_state ) {
            return;
        }

        global $wpdb;
        $needle = '[divi_powers_checkout]';
        $like   = '%' . $wpdb->esc_like( $needle ) . '%';
        $cursor = 0 === strpos( $migration_state, 'cursor:' ) ? absint( substr( $migration_state, 7 ) ) : 0;
        // phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery,WordPress.DB.DirectDatabaseQuery.NoCaching -- A one-time migration must inspect persisted content and should not cache the result.
        $ids    = $wpdb->get_col(
            $wpdb->prepare(
                "SELECT ID FROM {$wpdb->posts} WHERE ID > %d AND post_content LIKE %s AND post_type <> %s ORDER BY ID ASC LIMIT 100",
                $cursor,
                $like,
                'revision'
            )
        );

        foreach ( $ids as $post_id ) {
            $cursor = max( $cursor, absint( $post_id ) );
            $post = get_post( absint( $post_id ) );
            if ( ! $post || false === strpos( (string) $post->post_content, $needle ) ) {
                continue;
            }

            $current     = (string) $post->post_content;
            $stored_hash = (string) get_post_meta( $post->ID, '_divi_powers_generated_content_hash', true );
            $updated     = str_replace( $needle, '[woocommerce_checkout]', $current );
            $result      = wp_update_post(
                array(
                    'ID'           => $post->ID,
                    'post_content' => wp_slash( $updated ),
                ),
                true
            );

            if ( ! is_wp_error( $result ) && $stored_hash && hash_equals( $stored_hash, hash( 'sha256', $current ) ) ) {
                update_post_meta( $post->ID, '_divi_powers_generated_content_hash', hash( 'sha256', $updated ) );
            }

        }

        update_option(
            self::SHORTCODE_MIGRATION_OPTION,
            count( $ids ) < 100 ? '1' : 'cursor:' . $cursor,
            false
        );
    }

    public function confirmation_shortcode() {
        if ( ! function_exists( 'wc_get_order' ) ) { return wp_kses_post( '<p>' . esc_html__( 'WooCommerce order confirmation is unavailable.', '5d-powers-for-divi' ) . '</p>' ); }
        $order_id = absint( $_GET['dp_order'] ?? 0 ); // phpcs:ignore WordPress.Security.NonceVerification.Recommended
        if ( ! $order_id ) { $order_id = absint( get_query_var( 'order-received' ) ); }
        if ( ! $order_id ) { $order_id = absint( $_GET['order-received'] ?? $_GET['order_id'] ?? 0 ); } // phpcs:ignore WordPress.Security.NonceVerification.Recommended
        $key = wc_clean( sanitize_text_field( wp_unslash( $_GET['key'] ?? '' ) ) ); // phpcs:ignore WordPress.Security.NonceVerification.Recommended
        $order = $order_id ? wc_get_order( $order_id ) : null;
        if ( ! $order || ( $key && ! hash_equals( $order->get_order_key(), $key ) ) ) { return wp_kses_post( '<p>' . esc_html__( 'Your verified order details will appear here after checkout.', '5d-powers-for-divi' ) . '</p>' ); }
        if ( ! $key && ! current_user_can( 'manage_woocommerce' ) && ( ! get_current_user_id() || absint( $order->get_user_id() ) !== get_current_user_id() ) ) { return wp_kses_post( '<p>' . esc_html__( 'Order verification is required.', '5d-powers-for-divi' ) . '</p>' ); }
        $date_created = $order->get_date_created();
        $status       = function_exists( 'wc_get_order_status_name' ) ? wc_get_order_status_name( $order->get_status() ) : $order->get_status();
        $html_safe    = '<div class="dp-plus-order-confirmation">';
        $html_safe   .= '<p class="woocommerce-notice woocommerce-notice--success woocommerce-thankyou-order-received">' . esc_html__( 'Thank you. Your order has been received.', '5d-powers-for-divi' ) . '</p>';
        $html_safe   .= '<ul class="woocommerce-order-overview woocommerce-thankyou-order-details order_details">';
        $html_safe   .= '<li>' . esc_html__( 'Order number:', '5d-powers-for-divi' ) . ' <strong>' . esc_html( $order->get_order_number() ) . '</strong></li>';
        if ( $date_created ) {
            $html_safe .= '<li>' . esc_html__( 'Date:', '5d-powers-for-divi' ) . ' <strong>' . esc_html( wc_format_datetime( $date_created ) ) . '</strong></li>';
        }
        $html_safe .= '<li>' . esc_html__( 'Status:', '5d-powers-for-divi' ) . ' <strong>' . esc_html( $status ) . '</strong></li>';
        $html_safe .= '<li>' . esc_html__( 'Total:', '5d-powers-for-divi' ) . ' <strong>' . wp_kses_post( $order->get_formatted_order_total() ) . '</strong></li>';
        if ( $order->get_payment_method_title() ) {
            $html_safe .= '<li>' . esc_html__( 'Payment method:', '5d-powers-for-divi' ) . ' <strong>' . esc_html( $order->get_payment_method_title() ) . '</strong></li>';
        }
        $html_safe .= '</ul>';
        $html_safe .= '<h3>' . esc_html__( 'Order summary', '5d-powers-for-divi' ) . '</h3><ul class="dp-plus-order-confirmation__items">';
        foreach ( $order->get_items() as $item ) {
            $html_safe .= '<li><span>' . esc_html( $item->get_name() ) . ' × ' . esc_html( number_format_i18n( absint( $item->get_quantity() ) ) ) . '</span><strong>' . wp_kses_post( $order->get_formatted_line_subtotal( $item ) ) . '</strong></li>';
        }
        $html_safe .= '</ul></div>';

        return wp_kses_post( $html_safe );
    }

    public function is_checkout( $is_checkout ) { return $is_checkout || $this->is_configured_checkout_page(); }

    public function checkout_url( $url ) {
        if ( ! $this->runtime_enabled() ) { return $url; }
        $page_id = absint( $this->settings()['checkout_page_id'] );
        return $page_id && 'publish' === get_post_status( $page_id ) ? get_permalink( $page_id ) : $url;
    }

    public function received_url( $url, $order ) { return $this->custom_received_url( $url, $order ); }
    public function gateway_return_url( $url, $order ) { return $this->custom_received_url( $url, $order ); }

    private function custom_received_url( $url, $order ) {
        if ( ! $this->runtime_enabled() || ! $order ) { return $url; }
        // The order owns its destination; another browser visit must never change it.
        $funnel_id = absint( $order->get_meta( self::ORDER_META, true ) );
        $snapshot = absint( $order->get_meta( '_divi_powers_basic_thank_you_page', true ) );
        $settings = $funnel_id ? $this->settings( $funnel_id ) : $this->sanitize( get_option( self::OPTION_KEY, array() ) );
        $page_id = $snapshot ?: absint( $settings['thank_you_page_id'] );
        if ( ! $page_id || ! $order || 'publish' !== get_post_status( $page_id ) ) { return $url; }
        return add_query_arg( array( 'dp_order' => $order->get_id(), 'key' => $order->get_order_key() ), get_permalink( $page_id ) );
    }

    /**
     * Convert older custom thank-you links that used WooCommerce's reserved
     * order-received endpoint variable. On a normal WordPress page that query
     * variable can make WooCommerce reinterpret the request as an endpoint and
     * mark the page as a 404 before Divi renders it.
     */
    public function normalize_legacy_received_url() {
        if ( is_admin() || wp_doing_ajax() || empty( $_GET['order-received'] ) ) { // phpcs:ignore WordPress.Security.NonceVerification.Recommended
            return;
        }

        $page_id = absint( $this->settings()['thank_you_page_id'] );
        if ( ! $page_id || 'publish' !== get_post_status( $page_id ) ) {
            return;
        }

        $page_url = get_permalink( $page_id );
        if ( ! $page_url ) {
            return;
        }

        $request_uri = isset( $_SERVER['REQUEST_URI'] ) ? sanitize_url( wp_unslash( $_SERVER['REQUEST_URI'] ) ) : '';
        $request_path = wp_parse_url( $request_uri, PHP_URL_PATH );
        $page_path = wp_parse_url( $page_url, PHP_URL_PATH );

        if (
            untrailingslashit( rawurldecode( (string) $request_path ) )
            !== untrailingslashit( rawurldecode( (string) $page_path ) )
        ) {
            return;
        }

        $order_id = absint( $_GET['order-received'] ); // phpcs:ignore WordPress.Security.NonceVerification.Recommended
        $key = wc_clean( sanitize_text_field( wp_unslash( $_GET['key'] ?? '' ) ) ); // phpcs:ignore WordPress.Security.NonceVerification.Recommended

        if ( ! $order_id || ! $key || ! function_exists( 'wc_get_order' ) ) {
            return;
        }

        $order = wc_get_order( $order_id );
        if ( ! $order || ! hash_equals( (string) $order->get_order_key(), (string) $key ) ) {
            return;
        }

        wp_safe_redirect(
            add_query_arg(
                array(
                    'dp_order' => $order_id,
                    'key'      => $key,
                ),
                $page_url
            )
        );
        exit;
    }

    public function body_classes( $classes ) {
        if ( $this->is_configured_checkout_page() ) {
            $settings = $this->settings();
            $classes[] = 'dp-plus-checkout-page';
            $classes[] = 'dp-plus-checkout-layout-' . sanitize_html_class( $settings['layout'] );
            if ( $settings['distraction_free'] ) { $classes[] = 'dp-plus-checkout-distraction-free'; }
            if ( $settings['sticky_summary'] ) { $classes[] = 'dp-plus-checkout-sticky-summary'; }
        }
        if ( $this->is_configured_thank_you_page() ) { $classes[] = 'dp-plus-thank-you-page'; }
        return $classes;
    }

    public function capture_checkout_visit() {
        if ( function_exists( 'wc_get_page_id' ) && is_page( wc_get_page_id( 'checkout' ) ) && ! $this->page_funnel_id( get_queried_object_id() ) && function_exists( 'WC' ) && WC() && WC()->session ) { WC()->session->set( self::SESSION_CONTEXT, 0 ); }
        if ( ! $this->is_configured_checkout_page() || is_admin() || wp_doing_ajax() ) { return; }
        $funnel_id = $this->page_funnel_id( get_queried_object_id() );
        if ( function_exists( 'WC' ) && WC() && WC()->session ) {
            $marker = 'dp_plus_view_' . $funnel_id;
            WC()->session->set( self::SESSION_CONTEXT, $funnel_id );
            if ( WC()->session->get( $marker ) ) { return; }
            WC()->session->set( $marker, 1 );
        }
        $this->increment_metric( 'checkout_visits', $funnel_id );
    }

    public function attribute_order( $order, $data ) {
        unset( $data );
        $funnel_id = function_exists( 'WC' ) && WC() && WC()->session ? absint( WC()->session->get( self::SESSION_CONTEXT ) ) : 0;
        if ( $this->runtime_enabled() && $this->valid_funnel( $funnel_id ) ) {
            $order->update_meta_data( self::ORDER_META, $funnel_id );
            $order->update_meta_data( '_divi_powers_basic_thank_you_page', absint( $this->settings( $funnel_id )['thank_you_page_id'] ) );
        }
    }

    public function count_order( $order_id, $posted_data, $order ) {
        unset( $posted_data );
        $order = $order instanceof WC_Order ? $order : wc_get_order( $order_id );
        if ( ! $order || ! $order->get_meta( self::ORDER_META, true ) || $order->get_meta( self::ORDER_COUNTED_META, true ) ) { return; }
        $order->update_meta_data( self::ORDER_COUNTED_META, 1 );
        $order->save();
        $this->increment_metric( 'orders', absint( $order->get_meta( self::ORDER_META, true ) ) );
    }

    public static function metrics( $funnel_id = 0 ) {
        $metrics = $funnel_id ? get_post_meta( $funnel_id, '_divi_powers_basic_metrics', true ) : get_option( self::METRICS_OPTION, array() );
        if ( $funnel_id && ! metadata_exists( 'post', $funnel_id, '_divi_powers_basic_metrics' ) ) {
            $legacy = get_option( 'divi_powers_onboarding', array() );
            if ( $funnel_id === absint( $legacy['starter']['funnel_id'] ?? 0 ) ) { $metrics = get_option( self::METRICS_OPTION, array() ); }
        }
        return wp_parse_args( is_array( $metrics ) ? $metrics : array(), array( 'checkout_visits' => 0, 'orders' => 0 ) );
    }

    private function increment_metric( $key, $funnel_id = 0 ) {
        $metrics = self::metrics( $funnel_id );
        $metrics[$key] = absint( $metrics[$key] ?? 0 ) + 1;
        if ( $funnel_id ) { update_post_meta( $funnel_id, '_divi_powers_basic_metrics', $metrics ); }
        else { update_option( self::METRICS_OPTION, $metrics, false ); }
    }

    private function valid_funnel( $id ) {
        return $id && 'fivedp_funnel' === get_post_type( $id ) && 'trash' !== get_post_status( $id ) && 'pro' !== get_post_meta( $id, '_divi_powers_funnel_editor', true ) && metadata_exists( 'post', $id, '_divi_powers_basic_funnel_state' ) && 'active' === get_post_meta( $id, '_divi_powers_funnel_status', true );
    }

    private function page_funnel_id( $page_id ) {
        $context = get_post_meta( $page_id, Divi_Powers_Funnel_Meta::CONTEXT_META, true );
        $id = is_array( $context ) ? absint( $context['funnel_id'] ?? 0 ) : 0;
        return $this->valid_funnel( $id ) ? $id : 0;
    }

    private function current_funnel_id() {
        $page_id = get_queried_object_id();
        $id = $this->page_funnel_id( $page_id );
        if ( $id ) { return $id; }
        // A configured global checkout starts a new store journey, clearing a prior funnel.
        $global = get_option( self::OPTION_KEY, array() );
        if ( $page_id && $page_id === absint( $global['checkout_page_id'] ?? 0 ) ) { return 0; }
        if ( function_exists( 'WC' ) && WC() && WC()->session ) {
            $id = absint( WC()->session->get( self::SESSION_CONTEXT ) );
            if ( $this->valid_funnel( $id ) ) { return $id; }
        }
        return 0;
    }

    private function runtime_enabled() { return $this->plugin->is_power_enabled( 'plus_checkout' ); }
    private function is_configured_checkout_page() { $id = absint( $this->settings()['checkout_page_id'] ); return $this->runtime_enabled() && $id && is_page( $id ); }
    private function is_configured_thank_you_page() { $id = absint( $this->settings()['thank_you_page_id'] ); return $this->runtime_enabled() && $id && is_page( $id ); }
}