<?php

namespace ASENHA\Classes;

/**
 * Class for Disable Gutenberg module
 *
 * @since 6.9.5
 */
class Disable_Gutenberg {

    /**
     * Disable Gutenberg in wp-admin for some or all post types
     *
     * @since 2.8.0
     */
    public function disable_gutenberg_for_post_types_admin() {

        // Get current page's post type from WP core globals and query parameters

        global $pagenow, $typenow;

        $post_type = null;

        if ( 'edit.php' === $pagenow ) { // on the list table screen, $typenow returns correct post type

            $post_type = $typenow;

        } elseif ( 'post.php' === $pagenow ) { // on the edit screen, $typenow is empty, so we detect it

            $post_type = isset( $_GET['post'] ) ? get_post_type( $_GET['post'] ) : 'post';

        } elseif ( 'post-new.php' === $pagenow ) { // on the add new screen, best to get post type from GET parameter

            $post_type = isset( $_GET['post_type'] ) ? $_GET['post_type'] : 'post';

        } else {}

        // Check if Gutenberg feature is enabled for the site

        // Before/after WP v5.0.0 via feature plugin
        $gutenberg = function_exists( 'gutenberg_register_scripts_and_styles' );

        // Since WP v5.0.0, gutenberg is in core
        $block_editor = has_action( 'enqueue_block_assets' );

        // Gutenberg feature is not enabled for the site
        if ( ! $gutenberg && ( false === $block_editor ) ) {
            return; // do nothing
        }

        // Assemble single-dimensional array of post types for which Gutenberg should be disabled
        $options = get_option( ASENHA_SLUG_U );
        if ( bwasenha_fs()->can_use_premium_code__premium_only() ) {
            $disable_gutenberg_type = isset( $options['disable_gutenberg_type'] ) ? $options['disable_gutenberg_type'] : 'only-on';
        } else {
            $disable_gutenberg_type = 'only-on';
        }
        $disable_gutenberg_for = $options['disable_gutenberg_for'];
        $post_types_for_disable_gutenberg = array();

        foreach( $disable_gutenberg_for as $post_type_slug => $is_gutenberg_disabled ) {
            if ( $is_gutenberg_disabled ) {
                $post_types_for_disable_gutenberg[] = $post_type_slug;
            }
        }

        // Selectively disable Gutenberg
        if ( 'only-on' == $disable_gutenberg_type && in_array( $post_type, $post_types_for_disable_gutenberg ) 
            || 'except-on' == $disable_gutenberg_type && ! in_array( $post_type, $post_types_for_disable_gutenberg )
            || 'all-post-types' == $disable_gutenberg_type
        ) {

            // For WP v5.0.0 upwards
            add_filter( 'use_block_editor_for_post_type', '__return_false', 100 );

            // If Gutenberg feature plugin is activated
            if ( $gutenberg ) {
                add_filter( 'gutenberg_can_edit_post_type', '__return_false', 100 );
                $this->remove_all_gutenberg_hooks();
            }

        }

    }

    /**
     * Remove Gutenberg hooks added via feature plugin.
     *
     * @link https://plugins.trac.wordpress.org/browser/classic-editor/tags/1.6.2/classic-editor.php#L138
     * @since 2.8.0
     */
    public function remove_all_gutenberg_hooks() {

        remove_action( 'admin_menu', 'gutenberg_menu' );
        remove_action( 'admin_init', 'gutenberg_redirect_demo' );

        // Gutenberg 5.3+
        remove_action( 'wp_enqueue_scripts', 'gutenberg_register_scripts_and_styles' );
        remove_action( 'admin_enqueue_scripts', 'gutenberg_register_scripts_and_styles' );
        remove_action( 'admin_notices', 'gutenberg_wordpress_version_notice' );
        remove_action( 'rest_api_init', 'gutenberg_register_rest_widget_updater_routes' );
        remove_action( 'admin_print_styles', 'gutenberg_block_editor_admin_print_styles' );
        remove_action( 'admin_print_scripts', 'gutenberg_block_editor_admin_print_scripts' );
        remove_action( 'admin_print_footer_scripts', 'gutenberg_block_editor_admin_print_footer_scripts' );
        remove_action( 'admin_footer', 'gutenberg_block_editor_admin_footer' );
        remove_action( 'admin_enqueue_scripts', 'gutenberg_widgets_init' );
        remove_action( 'admin_notices', 'gutenberg_build_files_notice' );

        remove_filter( 'load_script_translation_file', 'gutenberg_override_translation_file' );
        remove_filter( 'block_editor_settings', 'gutenberg_extend_block_editor_styles' );
        remove_filter( 'default_content', 'gutenberg_default_demo_content' );
        remove_filter( 'default_title', 'gutenberg_default_demo_title' );
        remove_filter( 'block_editor_settings', 'gutenberg_legacy_widget_settings' );
        remove_filter( 'rest_request_after_callbacks', 'gutenberg_filter_oembed_result' );

        // Previously used, compat for older Gutenberg versions.
        remove_filter( 'wp_refresh_nonces', 'gutenberg_add_rest_nonce_to_heartbeat_response_headers' );
        remove_filter( 'get_edit_post_link', 'gutenberg_revisions_link_to_editor' );
        remove_filter( 'wp_prepare_revision_for_js', 'gutenberg_revisions_restore' );

        remove_action( 'rest_api_init', 'gutenberg_register_rest_routes' );
        remove_action( 'rest_api_init', 'gutenberg_add_taxonomy_visibility_field' );
        remove_filter( 'registered_post_type', 'gutenberg_register_post_prepare_functions' );

        remove_action( 'do_meta_boxes', 'gutenberg_meta_box_save' );
        remove_action( 'submitpost_box', 'gutenberg_intercept_meta_box_render' );
        remove_action( 'submitpage_box', 'gutenberg_intercept_meta_box_render' );
        remove_action( 'edit_page_form', 'gutenberg_intercept_meta_box_render' );
        remove_action( 'edit_form_advanced', 'gutenberg_intercept_meta_box_render' );
        remove_filter( 'redirect_post_location', 'gutenberg_meta_box_save_redirect' );
        remove_filter( 'filter_gutenberg_meta_boxes', 'gutenberg_filter_meta_boxes' );

        remove_filter( 'body_class', 'gutenberg_add_responsive_body_class' );
        remove_filter( 'admin_url', 'gutenberg_modify_add_new_button_url' ); // old
        remove_action( 'admin_enqueue_scripts', 'gutenberg_check_if_classic_needs_warning_about_blocks' );
        remove_filter( 'register_post_type_args', 'gutenberg_filter_post_type_labels' );        
    }

    /**
     * Disable Gutenberg styles and scripts on the front end for all or some post types
     *
     * @since 2.8.0
     */
    public function disable_gutenberg_for_post_types_frontend() {
        global $post;
        
        if ( ! is_null( $post ) ) {
            if ( property_exists( $post, 'post_type' ) ) {
                
                $post_type = $post->post_type;

                // Assemble single-dimensional array of post types for which Gutenberg should be disabled
                $options = get_option( ASENHA_SLUG_U );
                if ( bwasenha_fs()->can_use_premium_code__premium_only() ) {
                    $disable_gutenberg_type = isset( $options['disable_gutenberg_type'] ) ? $options['disable_gutenberg_type'] : 'only-on';
                } else {
                    $disable_gutenberg_type = 'only-on';
                }
                $disable_gutenberg_for = $options['disable_gutenberg_for'];
                $post_types_for_disable_gutenberg = array();

                foreach( $disable_gutenberg_for as $post_type_slug => $is_gutenberg_disabled ) {
                    if ( $is_gutenberg_disabled ) {
                        $post_types_for_disable_gutenberg[] = $post_type_slug;
                    }
                }

                // Selectively disable for the selected post types
                if ( 'only-on' == $disable_gutenberg_type && in_array( $post_type, $post_types_for_disable_gutenberg ) 
                    || 'except-on' == $disable_gutenberg_type && ! in_array( $post_type, $post_types_for_disable_gutenberg )
                    || 'all-post-types' == $disable_gutenberg_type
                ) {

                    global $wp_styles;

                    // As needed, exclude some block styles from dequeuing
                    $keep_enqueued = array(); // e.g. array( 'wp-block-navigation' );

                    foreach ( $wp_styles->queue as $handle ) {

                        // For all stye handles that starts with 'wp-block', e.g. 'wp-block-library', 'wp-block-library-theme'
                        if ( false !== strpos( $handle, 'wp-block' ) ) {

                            if ( ! in_array( $handle, $keep_enqueued ) ) {
                                wp_dequeue_style( $handle );
                                wp_deregister_style( $handle );
                            }

                        }

                    }

                    // Additional dequeuing
                    wp_dequeue_style( 'core-block-supports' );
                    wp_deregister_style( 'core-block-supports' );
                    wp_dequeue_style( 'global-styles' ); // theme.json
                    wp_deregister_style( 'global-styles' ); // theme.json
                    wp_dequeue_style( 'classic-theme-styles' ); // classic theme
                    wp_deregister_style( 'classic-theme-styles' ); // classic theme

                    wp_dequeue_style( 'wp-block-library' );
                    wp_deregister_style( 'wp-block-library' );
                }

                // wp_deregister_style( 'wp-block-library' );

            }
        }

    }
    
    /**
     * Temporary fix for Safari 18 negative horizontal margin on floats.
     * [TODO] Remove when Safari 18 implements a fix on their end.
     * 
     * @link https://wordpress.org/support/topic/safari-18-0-breaking-classic-editor/
     * @link https://plugins.trac.wordpress.org/changeset/3158976/classic-editor/trunk/classic-editor.php
     */
    public function safari_18_fix() {
        global $current_screen;
        
        if ( isset( $current_screen->base ) && 'post' === $current_screen->base ) {
            $clear = is_rtl() ? 'right' : 'left';
            ?>
            <style id="classic-editor-safari-18-temp-fix">
                _::-webkit-full-page-media, _:future, :root #post-body #postbox-container-2 {
                    clear: <?php echo $clear; ?>;
                }
            </style>
            <?php
        }
    }

}