<?php

// We're using the singleton design pattern
// https://code.tutsplus.com/articles/design-patterns-in-wordpress-the-singleton-pattern--wp-31621
// https://carlalexander.ca/singletons-in-wordpress/
// https://torquemag.io/2016/11/singletons-wordpress-good-evil/
/**
 * Main class of the plugin used to add functionalities
 *
 * @since 1.0.0
 */
class Admin_Site_Enhancements {
    // Refers to a single instance of this class
    private static $instance = null;

    /**
     * Creates or returns a single instance of this class
     *
     * @return Admin_Site_Enhancements a single instance of this class
     * @since 1.0.0
     */
    public static function get_instance() {
        if ( null == self::$instance ) {
            self::$instance = new self();
        }
        return self::$instance;
    }

    /**
     * Initialize plugin functionalities
     */
    private function __construct() {
        global $pagenow, $typenow;
        // Setup admin menu, admin page, settings, settings sections, sections fields, admin scripts, plugin action links, etc.
        // Register admin menu and add the settings page.
        add_action( 'admin_menu', 'asenha_register_admin_menu' );
        // Register plugin settings
        // Instantiate object for registration of settings section and fields
        $settings = new ASENHA\Classes\Settings_Sections_Fields();
        add_action( 'admin_init', [$settings, 'register_sections_fields'] );
        // Suppress all notices on the plugin's main page. Then add notification for successful settings update.
        add_action( 'admin_notices', 'asenha_suppress_add_notices', 5 );
        add_action( 'all_admin_notices', 'asenha_suppress_generic_notices', 5 );
        // Enqueue admin scripts and styles
        add_action( 'admin_enqueue_scripts', 'asenha_admin_scripts' );
        // Enqueue public scripts and styles
        add_action( 'wp_enqueue_scripts', 'asenha_public_scripts' );
        // Dequeue scripts that prevents settings page from working
        add_action( 'wp_print_scripts', 'asenha_dequeue_scritps', PHP_INT_MAX );
        add_action( 'admin_print_footer_scripts', 'asenha_dequeue_scritps', PHP_INT_MAX );
        add_action( 'admin_enqueue_scripts-tools_page_admin-site-enhancements', 'asenha_dequeue_scritps', PHP_INT_MAX );
        add_action( 'admin_print_scripts-tools_page_admin-site-enhancements', 'asenha_dequeue_scritps', PHP_INT_MAX );
        // Add admin bar inline styles
        add_action( 'admin_head', 'asenha_admin_bar_item_js_css' );
        add_action( 'wp_head', 'asenha_admin_bar_item_js_css' );
        add_filter( 'plugin_action_links_' . ASENHA_SLUG . '/' . ASENHA_SLUG . '.php', 'asenha_plugin_action_links' );
        // Mark that a user have supported ASE (via AJAX)
        add_action( 'wp_ajax_have_supported', 'asenha_have_supported' );
        // Dismiss upgrade nudge (via AJAX)
        add_action( 'wp_ajax_dismiss_upgrade_nudge', 'asenha_dismiss_upgrade_nudge' );
        // Dismiss support nudge (via AJAX)
        add_action( 'wp_ajax_dismiss_support_nudge', 'asenha_dismiss_support_nudge' );
        if ( function_exists( 'bwasenha_fs' ) ) {
            bwasenha_fs()->add_filter( 'plugin_icon', 'fs_custom_optin_icon__premium_only' );
        }
        // Add style="display:[something];" to the safe CSS attributes.
        // Ref: https://github.com/WordPress/wordpress-develop/blob/6.4/src/wp-includes/kses.php#L2329
        // Ref: https://wordpress.stackexchange.com/a/195433
        add_filter( 'safe_style_css', function ( $styles ) {
            $styles[] = 'display';
            return $styles;
        } );
        // ===== Activate features based on settings =====
        // Get all WP Enhancements options, default to empty array in case it's not been created yet
        $options = get_option( ASENHA_SLUG_U, array() );
        // Content Duplication
        if ( array_key_exists( 'enable_duplication', $options ) && $options['enable_duplication'] ) {
            $content_duplication = new ASENHA\Classes\Content_Duplication();
            add_action( 'admin_action_duplicate_content', [$content_duplication, 'duplicate_content'] );
            add_filter(
                'page_row_actions',
                [$content_duplication, 'add_duplication_action_link'],
                10,
                2
            );
            add_filter(
                'post_row_actions',
                [$content_duplication, 'add_duplication_action_link'],
                10,
                2
            );
            add_action( 'admin_bar_menu', [$content_duplication, 'add_admin_bar_duplication_link'], 100 );
        }
        // Content Order
        if ( array_key_exists( 'content_order', $options ) && $options['content_order'] ) {
            if ( array_key_exists( 'content_order_for', $options ) && !empty( $options['content_order_for'] ) || array_key_exists( 'content_order_for_other_post_types', $options ) && !empty( $options['content_order_for_other_post_types'] ) ) {
                $content_order = new ASENHA\Classes\Content_Order();
                add_action( 'admin_menu', [$content_order, 'add_content_order_submenu'] );
                add_action( 'wp_ajax_save_custom_order', [$content_order, 'save_custom_content_order'] );
                add_filter( 'pre_get_posts', [$content_order, 'orderby_menu_order'] );
                add_filter(
                    'save_post',
                    [$content_order, 'set_menu_order_for_new_posts'],
                    10,
                    3
                );
            }
        }
        // Media Replacement
        if ( array_key_exists( 'enable_media_replacement', $options ) && $options['enable_media_replacement'] ) {
            $media_replacement = new ASENHA\Classes\Media_Replacement();
            add_filter(
                'media_row_actions',
                [$media_replacement, 'modify_media_list_table_edit_link'],
                10,
                2
            );
            add_filter(
                'attachment_fields_to_edit',
                [$media_replacement, 'add_media_replacement_button'],
                10,
                2
            );
            add_action( 'edit_attachment', [$media_replacement, 'replace_media'] );
            add_filter( 'post_updated_messages', [$media_replacement, 'attachment_updated_custom_message'] );
            // Bust browser cache of old/replaced images
            add_filter(
                'wp_calculate_image_srcset',
                [$media_replacement, 'append_cache_busting_param_to_image_srcset'],
                10,
                5
            );
            add_filter(
                'wp_get_attachment_image_src',
                [$media_replacement, 'append_cache_busting_param_to_attachment_image_src'],
                10,
                2
            );
            add_filter(
                'wp_prepare_attachment_for_js',
                [$media_replacement, 'append_cache_busting_param_to_attachment_for_js'],
                10,
                2
            );
            add_filter(
                'wp_get_attachment_url',
                [$media_replacement, 'append_cache_busting_param_to_attachment_url'],
                20,
                2
            );
        }
        // Media Library Infinite Scrolling
        if ( array_key_exists( 'media_library_infinite_scrolling', $options ) && $options['media_library_infinite_scrolling'] ) {
            add_filter( 'media_library_infinite_scrolling', '__return_true' );
        }
        // SVG Upload
        if ( array_key_exists( 'enable_svg_upload', $options ) && $options['enable_svg_upload'] && array_key_exists( 'enable_svg_upload_for', $options ) && isset( $options['enable_svg_upload_for'] ) ) {
            global $roles_svg_upload_enabled;
            $enable_svg_upload = $options['enable_svg_upload'];
            $for_roles = $options['enable_svg_upload_for'];
            // User has role(s). Do further checks.
            if ( isset( $for_roles ) && count( $for_roles ) > 0 ) {
                // Assemble single-dimensional array of roles for which SVG upload would be enabled
                $roles_svg_upload_enabled = array();
                foreach ( $for_roles as $role_slug => $svg_upload_enabled ) {
                    if ( $svg_upload_enabled ) {
                        $roles_svg_upload_enabled[] = $role_slug;
                    }
                }
            }
            $svg_upload = new ASENHA\Classes\SVG_Upload();
            add_filter( 'upload_mimes', [$svg_upload, 'add_svg_mime'] );
            add_filter(
                'wp_check_filetype_and_ext',
                [$svg_upload, 'confirm_file_type_is_svg'],
                10,
                4
            );
            add_filter( 'wp_handle_upload_prefilter', [$svg_upload, 'sanitize_and_maybe_allow_svg_upload'] );
            add_filter(
                'wp_generate_attachment_metadata',
                [$svg_upload, 'generate_svg_metadata'],
                10,
                3
            );
            add_action( 'wp_ajax_svg_get_attachment_url', [$svg_upload, 'get_svg_attachment_url'] );
            add_filter( 'wp_prepare_attachment_for_js', [$svg_upload, 'get_svg_url_in_media_library'] );
        }
        // External Permalinks
        if ( array_key_exists( 'enable_external_permalinks', $options ) && $options['enable_external_permalinks'] ) {
            if ( array_key_exists( 'enable_external_permalinks_for', $options ) && !empty( $options['enable_external_permalinks_for'] ) ) {
                $external_permalinks = new ASENHA\Classes\External_Permalinks();
                add_action(
                    'add_meta_boxes',
                    [$external_permalinks, 'add_external_permalink_meta_box'],
                    10,
                    2
                );
                add_action( 'save_post', [$external_permalinks, 'save_external_permalink'] );
                // Filter the permalink for use by get_permalink()
                add_filter(
                    'page_link',
                    [$external_permalinks, 'use_external_permalink_for_pages'],
                    20,
                    2
                );
                add_filter(
                    'post_link',
                    [$external_permalinks, 'use_external_permalink_for_posts'],
                    20,
                    2
                );
                add_filter(
                    'post_type_link',
                    [$external_permalinks, 'use_external_permalink_for_posts'],
                    20,
                    2
                );
                // Enable redirection to external permalink when page/post is opened directly via it's WP permalink
                add_action( 'wp', [$external_permalinks, 'redirect_to_external_permalink'] );
            }
        }
        // Open All External Links in New Tab
        if ( array_key_exists( 'external_links_new_tab', $options ) && $options['external_links_new_tab'] ) {
            $open_external_links_in_new_tab = new ASENHA\Classes\Open_External_Links_In_New_Tab();
            add_filter( 'the_content', [$open_external_links_in_new_tab, 'add_target_and_rel_atts_to_content_links'] );
        }
        // Allow Custom Menu Links to Open in New Tab
        if ( array_key_exists( 'custom_nav_menu_items_new_tab', $options ) && $options['custom_nav_menu_items_new_tab'] ) {
            $custom_nav_menu_items_in_new_tab = new ASENHA\Classes\Custom_Nav_Menu_Items_In_New_Tab();
            add_filter(
                'wp_nav_menu_item_custom_fields',
                [$custom_nav_menu_items_in_new_tab, 'add_custom_nav_menu_open_in_new_tab_field'],
                10,
                4
            );
            add_action(
                'wp_update_nav_menu_item',
                [$custom_nav_menu_items_in_new_tab, 'save_custom_nav_menu_open_in_new_tab_status'],
                10,
                3
            );
            add_action(
                'nav_menu_link_attributes',
                [$custom_nav_menu_items_in_new_tab, 'add_attributes_to_custom_nav_menu_item'],
                10,
                3
            );
        }
        // Auto-Publishing of Posts with Missed Schedules
        if ( array_key_exists( 'enable_missed_schedule_posts_auto_publish', $options ) && $options['enable_missed_schedule_posts_auto_publish'] ) {
            $auto_publish_posts_with_missed_schedule = new ASENHA\Classes\Auto_Publish_Posts_With_Missed_Schedule();
            add_action( 'wp_head', [$auto_publish_posts_with_missed_schedule, 'publish_missed_schedule_posts'] );
            add_action( 'admin_head', [$auto_publish_posts_with_missed_schedule, 'publish_missed_schedule_posts'] );
        }
        // =================================================================
        // ADMIN INTERFACE
        // =================================================================
        // Hide or Modify Elements / Clean Up Admin Bar
        if ( array_key_exists( 'hide_modify_elements', $options ) && $options['hide_modify_elements'] ) {
            $cleanup_admin_bar = new ASENHA\Classes\Cleanup_Admin_Bar();
            // Priority 5 to execute earlier than the normal 10. This is for removing default items.
            add_filter( 'admin_bar_menu', [$cleanup_admin_bar, 'modify_admin_bar_menu'], 5 );
            if ( array_key_exists( 'hide_help_drawer', $options ) && $options['hide_help_drawer'] ) {
                add_action( 'admin_head', [$cleanup_admin_bar, 'hide_help_drawer'] );
            }
        }
        // Hide Admin Notices
        if ( array_key_exists( 'hide_admin_notices', $options ) && $options['hide_admin_notices'] ) {
            $hide_admin_notices = new ASENHA\Classes\Hide_Admin_Notices();
            add_action( 'admin_notices', [$hide_admin_notices, 'admin_notices_wrapper'], 9 );
            // add_action( 'all_admin_notices', [ $hide_admin_notices, 'admin_notices_wrapper' ] );
            add_action( 'admin_bar_menu', [$hide_admin_notices, 'admin_notices_menu'] );
            add_action( 'admin_print_styles', [$hide_admin_notices, 'admin_notices_menu_inline_css'] );
        }
        // Disable Dashboard Widgets
        if ( array_key_exists( 'disable_dashboard_widgets', $options ) && $options['disable_dashboard_widgets'] ) {
            $disable_dashboard_widgets = new ASENHA\Classes\Disable_Dashboard_Widgets();
            add_action( 'wp_dashboard_setup', [$disable_dashboard_widgets, 'disable_dashboard_widgets'], 99 );
        }
        // Hide Admin Bar
        if ( array_key_exists( 'hide_admin_bar', $options ) && $options['hide_admin_bar'] ) {
            $hide_admin_bar = new ASENHA\Classes\Hide_Admin_Bar();
        }
        // On the frontend
        if ( array_key_exists( 'hide_admin_bar', $options ) && $options['hide_admin_bar'] && array_key_exists( 'hide_admin_bar_for', $options ) && isset( $options['hide_admin_bar_for'] ) ) {
            add_filter( 'show_admin_bar', [$hide_admin_bar, 'hide_admin_bar_for_roles_on_frontend'] );
        }
        // Wider Admin Menu
        if ( array_key_exists( 'wider_admin_menu', $options ) && $options['wider_admin_menu'] ) {
            $wider_admin_menu = new ASENHA\Classes\Wider_Admin_Menu();
            add_action( 'admin_head', [$wider_admin_menu, 'set_custom_menu_width'], 99 );
        }
        // Admin Menu Organizer
        if ( array_key_exists( 'customize_admin_menu', $options ) && $options['customize_admin_menu'] ) {
            $admin_menu_organizer = new ASENHA\Classes\Admin_Menu_Organizer();
            // add_action( 'wp_ajax_save_custom_menu_order', [ $admin_menu_organizer, 'save_custom_menu_order' ] );
            // add_action( 'wp_ajax_save_hidden_menu_items', [ $admin_menu_organizer, 'save_hidden_menu_items' ] );
            if ( array_key_exists( 'custom_menu_order', $options ) ) {
                add_filter( 'custom_menu_order', '__return_true' );
                add_filter( 'menu_order', [$admin_menu_organizer, 'render_custom_menu_order'], PHP_INT_MAX );
            }
            if ( array_key_exists( 'custom_menu_titles', $options ) ) {
                add_action( 'admin_menu', [$admin_menu_organizer, 'apply_custom_menu_item_titles'], 999995 );
            }
            if ( array_key_exists( 'custom_menu_hidden', $options ) || array_key_exists( 'custom_menu_always_hidden', $options ) ) {
                add_action( 'admin_menu', [$admin_menu_organizer, 'hide_menu_items'], 999996 );
                add_action( 'admin_menu', [$admin_menu_organizer, 'add_hidden_menu_toggle'], 999997 );
                add_action( 'admin_enqueue_scripts', [$admin_menu_organizer, 'enqueue_toggle_hidden_menu_script'] );
            }
        }
        // Show Custom Taxonomy Filters
        if ( array_key_exists( 'show_custom_taxonomy_filters', $options ) && $options['show_custom_taxonomy_filters'] ) {
            $show_custom_taxonomy_filters = new ASENHA\Classes\Show_Custom_Taxonomy_Filters();
            add_action( 'restrict_manage_posts', [$show_custom_taxonomy_filters, 'show_custom_taxonomy_filters'] );
        }
        // Enhance List Tables
        if ( array_key_exists( 'enhance_list_tables', $options ) && $options['enhance_list_tables'] ) {
            $enhance_list_tables = new ASENHA\Classes\Enhance_List_Tables();
            // Show Featured Image Column
            if ( array_key_exists( 'show_featured_image_column', $options ) && $options['show_featured_image_column'] ) {
                add_action( 'admin_init', [$enhance_list_tables, 'show_featured_image_column'] );
            }
            // Show Excerpt Column
            if ( array_key_exists( 'show_excerpt_column', $options ) && $options['show_excerpt_column'] ) {
                add_action( 'admin_init', [$enhance_list_tables, 'show_excerpt_column'] );
            }
            // Show ID Column
            if ( array_key_exists( 'show_id_column', $options ) && $options['show_id_column'] ) {
                add_action( 'admin_init', [$enhance_list_tables, 'show_id_column'] );
            }
            // Show File Size Column in Media Library
            if ( array_key_exists( 'show_file_size_column', $options ) && $options['show_file_size_column'] ) {
                add_filter( 'manage_upload_columns', [$enhance_list_tables, 'add_column_file_size'] );
                add_action(
                    'manage_media_custom_column',
                    [$enhance_list_tables, 'display_file_size'],
                    10,
                    2
                );
                add_action( 'admin_head', [$enhance_list_tables, 'add_media_styles'] );
            }
            // Show ID in Action Row
            if ( array_key_exists( 'show_id_in_action_row', $options ) && $options['show_id_in_action_row'] ) {
                add_action( 'admin_init', [$enhance_list_tables, 'show_id_in_action_row'] );
            }
            // Hide Comments Column
            if ( array_key_exists( 'hide_comments_column', $options ) && $options['hide_comments_column'] ) {
                add_action( 'admin_init', [$enhance_list_tables, 'hide_comments_column'] );
            }
            // Hide Post Tags Column
            if ( array_key_exists( 'hide_post_tags_column', $options ) && $options['hide_post_tags_column'] ) {
                add_action( 'admin_init', [$enhance_list_tables, 'hide_post_tags_column'] );
            }
        }
        // Display Active Plugins First
        if ( array_key_exists( 'display_active_plugins_first', $options ) && $options['display_active_plugins_first'] ) {
            $display_active_plugins_first = new ASENHA\Classes\Display_Active_Plugins_First();
            add_action( 'admin_head-plugins.php', [$display_active_plugins_first, 'show_active_plugins_first'] );
        }
        // Custom Admin Footer Text
        if ( array_key_exists( 'custom_admin_footer_text', $options ) && $options['custom_admin_footer_text'] ) {
            $custom_admin_footer_text = new ASENHA\Classes\Custom_Admin_Footer_Text();
            // Update footer text
            if ( is_asenha() ) {
                add_filter( 'admin_footer_text', 'asenha_footer_text', 20 );
            } else {
                add_filter( 'admin_footer_text', [$custom_admin_footer_text, 'custom_admin_footer_text_left'], 20 );
            }
            // Update footer version text
            if ( is_asenha() ) {
                add_filter( 'update_footer', 'asenha_footer_version_text', 20 );
            } else {
                add_filter( 'update_footer', [$custom_admin_footer_text, 'custom_admin_footer_text_right'], 20 );
            }
        } else {
            // Update footer text
            if ( is_asenha() ) {
                add_filter( 'admin_footer_text', 'asenha_footer_text', 20 );
            }
            // Update footer version text
            if ( is_asenha() ) {
                add_filter( 'update_footer', 'asenha_footer_version_text', 20 );
            }
        }
        // =================================================================
        // LOG IN | LOG OUT
        // =================================================================
        // Change Login URL
        if ( array_key_exists( 'change_login_url', $options ) && $options['change_login_url'] ) {
            if ( array_key_exists( 'custom_login_slug', $options ) && !empty( $options['custom_login_slug'] ) ) {
                $change_login_url = new ASENHA\Classes\Change_Login_URL();
                add_action( 'init', [$change_login_url, 'redirect_on_custom_login_url'] );
                // add_filter( 'login_url', [ $change_login_url, 'customize_login_url' ] );
                add_filter( 'lostpassword_url', [$change_login_url, 'customize_lost_password_url'] );
                add_filter( 'register_url', [$change_login_url, 'customize_register_url'] );
                add_action( 'wp_loaded', [$change_login_url, 'redirect_on_default_login_urls'] );
                add_action( 'wp_login_failed', [$change_login_url, 'redirect_to_custom_login_url_on_login_fail'] );
                add_filter( 'login_message', [$change_login_url, 'add_failed_login_message'] );
                add_action( 'wp_logout', [$change_login_url, 'redirect_to_custom_login_url_on_logout_success'] );
            }
        }
        // Login ID Type
        if ( array_key_exists( 'login_id_type_restriction', $options ) && $options['login_id_type_restriction'] ) {
            if ( array_key_exists( 'login_id_type', $options ) && !empty( $options['login_id_type'] ) ) {
                $login_id_type = new ASENHA\Classes\Login_ID_Type();
                switch ( $options['login_id_type'] ) {
                    case 'username':
                        remove_filter( 'authenticate', 'wp_authenticate_email_password', 20 );
                        add_filter( 'login_form_defaults', [$login_id_type, 'change_login_form_defaults'] );
                        add_filter(
                            'gettext',
                            [$login_id_type, 'gettext_login_id_username'],
                            20,
                            3
                        );
                        break;
                    case 'email':
                        add_filter(
                            'authenticate',
                            [$login_id_type, 'authenticate_email'],
                            20,
                            2
                        );
                        add_filter(
                            'gettext',
                            [$login_id_type, 'gettext_login_id_email'],
                            20,
                            3
                        );
                        break;
                }
            }
        }
        // Use Site Identity on the Login Page
        if ( array_key_exists( 'site_identity_on_login', $options ) && $options['site_identity_on_login'] ) {
            $site_identity_on_login_page = new ASENHA\Classes\Site_Identity_On_Login_Page();
            add_action( 'login_head', [$site_identity_on_login_page, 'use_site_icon_on_login'] );
            add_filter( 'login_headerurl', [$site_identity_on_login_page, 'use_site_url_on_login'] );
        }
        // Login Logout Menu
        if ( array_key_exists( 'enable_login_logout_menu', $options ) && $options['enable_login_logout_menu'] ) {
            $login_logout_menu = new ASENHA\Classes\Login_Logout_Menu();
            add_action( 'admin_head-nav-menus.php', [$login_logout_menu, 'add_login_logout_metabox'] );
            add_filter( 'wp_setup_nav_menu_item', [$login_logout_menu, 'set_login_logout_menu_item_dynamic_url'] );
            add_filter( 'wp_nav_menu_objects', [$login_logout_menu, 'maybe_remove_login_or_logout_menu_item'] );
        }
        // Enable Last Login Column
        if ( array_key_exists( 'enable_last_login_column', $options ) && $options['enable_last_login_column'] ) {
            $last_login_column = new ASENHA\Classes\Last_Login_Column();
            add_action( 'wp_login', [$last_login_column, 'log_login_datetime'] );
            add_filter( 'manage_users_columns', [$last_login_column, 'add_last_login_column'] );
            add_filter(
                'manage_users_custom_column',
                [$last_login_column, 'show_last_login_info'],
                10,
                3
            );
            add_action( 'admin_print_styles-users.php', [$last_login_column, 'add_column_style'] );
        }
        // Redirect After Login
        if ( array_key_exists( 'redirect_after_login', $options ) && $options['redirect_after_login'] ) {
            if ( array_key_exists( 'redirect_after_login_for', $options ) && !empty( $options['redirect_after_login_for'] ) ) {
                $redirect_after_login = new ASENHA\Classes\Redirect_After_Login();
                add_filter(
                    'wp_login',
                    [$redirect_after_login, 'redirect_after_login'],
                    5,
                    2
                );
            }
        }
        // Redirect After Logout
        if ( array_key_exists( 'redirect_after_logout', $options ) && $options['redirect_after_logout'] ) {
            if ( array_key_exists( 'redirect_after_logout_for', $options ) && !empty( $options['redirect_after_logout_for'] ) ) {
                $redirect_after_logout = new ASENHA\Classes\Redirect_After_Logout();
                add_action(
                    'wp_logout',
                    [$redirect_after_logout, 'redirect_after_logout'],
                    5,
                    1
                );
                // load earlier than Change Login URL add_action
            }
        }
        // Enable Custom Admin / Frontend CSS
        if ( array_key_exists( 'enable_custom_admin_css', $options ) && $options['enable_custom_admin_css'] || array_key_exists( 'enable_custom_frontend_css', $options ) && $options['enable_custom_frontend_css'] ) {
            $custom_css = new ASENHA\Classes\Custom_Css();
        }
        if ( array_key_exists( 'enable_custom_admin_css', $options ) && $options['enable_custom_admin_css'] ) {
            // add_filter( 'admin_enqueue_scripts', [ $custom_css, 'custom_admin_css' ] );
            add_filter( 'admin_print_footer_scripts', [$custom_css, 'custom_admin_css'] );
        }
        if ( array_key_exists( 'enable_custom_frontend_css', $options ) && $options['enable_custom_frontend_css'] ) {
            add_filter( 'wp_head', [$custom_css, 'custom_frontend_css'] );
        }
        // Insert <head>, <body> and <footer> code
        if ( array_key_exists( 'insert_head_body_footer_code', $options ) && $options['insert_head_body_footer_code'] ) {
            $insert_code = new ASENHA\Classes\Insert_Head_Body_Footer_Code();
            if ( isset( $options['head_code_priority'] ) ) {
                add_action( 'wp_head', [$insert_code, 'insert_head_code'], $options['head_code_priority'] );
            } else {
                add_action( 'wp_head', [$insert_code, 'insert_head_code'], 10 );
            }
            if ( function_exists( 'wp_body_open' ) && version_compare( get_bloginfo( 'version' ), '5.2', '>=' ) ) {
                if ( isset( $options['body_code_priority'] ) ) {
                    add_action( 'wp_body_open', [$insert_code, 'insert_body_code'], $options['body_code_priority'] );
                } else {
                    add_action( 'wp_body_open', [$insert_code, 'insert_body_code'], 10 );
                }
            }
            if ( isset( $options['footer_code_priority'] ) ) {
                add_action( 'wp_footer', [$insert_code, 'insert_footer_code'], $options['footer_code_priority'] );
            } else {
                add_action( 'wp_footer', [$insert_code, 'insert_footer_code'], 10 );
            }
        }
        // Custom Body Class
        if ( array_key_exists( 'enable_custom_body_class', $options ) && $options['enable_custom_body_class'] ) {
            if ( array_key_exists( 'enable_custom_body_class_for', $options ) && !empty( $options['enable_custom_body_class_for'] ) ) {
                $custom_body_class = new ASENHA\Classes\Custom_Body_Class();
                add_action(
                    'add_meta_boxes',
                    [$custom_body_class, 'add_custom_body_class_meta_box'],
                    10,
                    2
                );
                add_action( 'save_post', [$custom_body_class, 'save_custom_body_class'], 99 );
                add_filter( 'body_class', [$custom_body_class, 'append_custom_body_class'], 99 );
            }
        }
        // Manage ads.txt and app-ads.txt
        if ( array_key_exists( 'manage_ads_appads_txt', $options ) && $options['manage_ads_appads_txt'] ) {
            $manage_ads_appads_txt = new ASENHA\Classes\Manage_Ads_Appads_Txt();
            add_action( 'init', [$manage_ads_appads_txt, 'show_ads_appads_txt_content'] );
        }
        // Manage robots.txt
        if ( array_key_exists( 'manage_robots_txt', $options ) && $options['manage_robots_txt'] ) {
            $manage_robots_txt = new ASENHA\Classes\Manage_Robots_Txt();
            add_filter(
                'robots_txt',
                [$manage_robots_txt, 'maybe_show_custom_robots_txt_content'],
                10,
                2
            );
        }
        // =================================================================
        // DISABLE COMPONENTS
        // =================================================================
        // Disable Gutenberg
        if ( array_key_exists( 'disable_gutenberg', $options ) && $options['disable_gutenberg'] ) {
            if ( array_key_exists( 'disable_gutenberg_for', $options ) && !empty( $options['disable_gutenberg_for'] ) ) {
                $disable_gutenberg = new ASENHA\Classes\Disable_Gutenberg();
                if ( !class_exists( 'Classic_Editor' ) ) {
                    require_once ASENHA_PATH . 'includes/empty-class-classic-editor.php';
                }
                add_action( 'admin_init', [$disable_gutenberg, 'disable_gutenberg_for_post_types_admin'] );
                if ( array_key_exists( 'disable_gutenberg_frontend_styles', $options ) && $options['disable_gutenberg_frontend_styles'] ) {
                    add_action( 'wp_enqueue_scripts', [$disable_gutenberg, 'disable_gutenberg_for_post_types_frontend'], 100 );
                }
            }
        }
        // Disable Comments
        if ( array_key_exists( 'disable_comments', $options ) && $options['disable_comments'] ) {
            if ( array_key_exists( 'disable_comments_for', $options ) && !empty( $options['disable_comments_for'] ) ) {
                $disable_comments = new ASENHA\Classes\Disable_Comments();
                add_action( 'admin_init', [$disable_comments, 'disable_comments_for_post_types_edit'] );
                // also work with 'init', 'admin_init', 'wp_loaded', 'do_meta_boxes' hooks
                add_action( 'template_redirect', [$disable_comments, 'show_blank_comment_template'] );
                add_action( 'wp_loaded', [$disable_comments, 'hide_existing_comments_on_frontend'] );
                add_filter(
                    'comments_array',
                    [$disable_comments, 'maybe_return_empty_comments'],
                    20,
                    2
                );
                add_filter(
                    'comments_open',
                    [$disable_comments, 'close_comments_pings_on_frontend'],
                    20,
                    2
                );
                add_filter(
                    'pings_open',
                    [$disable_comments, 'close_comments_pings_on_frontend'],
                    20,
                    2
                );
                add_filter(
                    'get_comments_number',
                    [$disable_comments, 'return_zero_comments_count'],
                    20,
                    2
                );
                // Disable commenting via XML-RPC
                add_filter( 'xmlrpc_allow_anonymous_comments', '__return_false' );
                add_filter( 'xmlrpc_methods', [$disable_comments, 'disable_xmlrpc_comments'] );
                // Disable commenting via REST API
                add_filter( 'rest_endpoints', [$disable_comments, 'disable_rest_api_comments_endpoints'] );
                add_filter(
                    'rest_pre_insert_comment',
                    [$disable_comments, 'return_blank_comment'],
                    10,
                    2
                );
            }
        }
        // Disable REST API
        if ( array_key_exists( 'disable_rest_api', $options ) && $options['disable_rest_api'] ) {
            if ( version_compare( get_bloginfo( 'version' ), '4.7', '>=' ) ) {
                $disable_rest_api = new ASENHA\Classes\Disable_REST_API();
                add_filter( 'rest_authentication_errors', [$disable_rest_api, 'disable_rest_api'] );
            } else {
                // REST API 1.x
                add_filter( 'json_enabled', '__return_false' );
                add_filter( 'json_jsonp_enabled', '__return_false' );
                // REST API 2.x
                add_filter( 'rest_enabled', '__return_false' );
                add_filter( 'rest_jsonp_enabled', '__return_false' );
            }
            remove_action( 'wp_head', 'rest_output_link_wp_head', 10 );
            // Disable REST API links in HTML <head>
            remove_action(
                'template_redirect',
                'rest_output_link_header',
                11,
                0
            );
            // Disable REST API link in HTTP headers
            remove_action( 'xmlrpc_rsd_apis', 'rest_output_rsd' );
            // Remove REST API URL from the WP RSD endpoint.
        }
        // Disable Feeds
        if ( array_key_exists( 'disable_feeds', $options ) && $options['disable_feeds'] ) {
            remove_action( 'wp_head', 'feed_links', 2 );
            // Remove feed links in <head>
            remove_action( 'wp_head', 'feed_links_extra', 3 );
            // Remove feed links in <head>
            remove_action(
                'do_feed_rdf',
                'do_feed_rdf',
                10,
                0
            );
            remove_action(
                'do_feed_rss',
                'do_feed_rss',
                10,
                0
            );
            remove_action(
                'do_feed_rss2',
                'do_feed_rss2',
                10,
                1
            );
            remove_action(
                'do_feed_atom',
                'do_feed_atom',
                10,
                1
            );
            $disable_feeds = new ASENHA\Classes\Disable_Feeds();
            add_action(
                'template_redirect',
                [$disable_feeds, 'redirect_feed_to_403'],
                10,
                1
            );
        }
        // Disable All Updates
        if ( array_key_exists( 'disable_all_updates', $options ) && $options['disable_all_updates'] ) {
            $disable_updates = new ASENHA\Classes\Disable_Updates();
            add_action( 'admin_init', [$disable_updates, 'disable_update_notices_version_checks'] );
            // Disable core update
            add_filter( 'pre_transient_update_core', [$disable_updates, 'override_version_check_info'] );
            add_filter( 'pre_site_transient_update_core', [$disable_updates, 'override_version_check_info'] );
            // Disable theme updates
            add_filter( 'pre_transient_update_themes', [$disable_updates, 'override_version_check_info'] );
            add_filter( 'pre_site_transient_update_themes', [$disable_updates, 'override_version_check_info'] );
            add_action( 'pre_set_site_transient_update_themes', [$disable_updates, 'override_version_check_info'], 20 );
            // Disable plugin updates
            add_filter( 'pre_transient_update_plugins', [$disable_updates, 'override_version_check_info'] );
            add_filter( 'pre_site_transient_update_plugins', [$disable_updates, 'override_version_check_info'] );
            add_action( 'pre_set_site_transient_update_plugins', [$disable_updates, 'override_version_check_info'], 20 );
            // Disable auto updates
            add_filter( 'automatic_updater_disabled', '__return_true' );
            if ( !defined( 'AUTOMATIC_UPDATER_DISABLED' ) ) {
                define( 'AUTOMATIC_UPDATER_DISABLED', true );
            }
            if ( !defined( 'WP_AUTO_UPDATE_CORE' ) ) {
                define( 'WP_AUTO_UPDATE_CORE', false );
            }
            add_filter( 'auto_update_core', '__return_false' );
            add_filter( 'wp_auto_update_core', '__return_false' );
            add_filter( 'allow_minor_auto_core_updates', '__return_false' );
            add_filter( 'allow_major_auto_core_updates', '__return_false' );
            add_filter( 'allow_dev_auto_core_updates', '__return_false' );
            add_filter( 'auto_update_plugin', '__return_false' );
            add_filter( 'auto_update_theme', '__return_false' );
            add_filter( 'auto_update_translation', '__return_false' );
            remove_action( 'init', 'wp_schedule_update_checks' );
            // Disable update emails
            add_filter( 'auto_core_update_send_email', '__return_false' );
            add_filter( 'send_core_update_notification_email', '__return_false' );
            add_filter( 'automatic_updates_send_debug_email', '__return_false' );
            // Remove Dashboard >> Updates menu
            add_action( 'admin_menu', [$disable_updates, 'remove_updates_menu'] );
        }
        // Disable Smaller Components
        if ( array_key_exists( 'disable_smaller_components', $options ) && $options['disable_smaller_components'] ) {
            $disable_smaller_components = new ASENHA\Classes\Disable_Smaller_Components();
            if ( array_key_exists( 'disable_head_generator_tag', $options ) && $options['disable_head_generator_tag'] ) {
                remove_action( 'wp_head', 'wp_generator' );
            }
            if ( array_key_exists( 'disable_resource_version_number', $options ) && $options['disable_resource_version_number'] ) {
                add_filter( 'style_loader_src', [$disable_smaller_components, 'remove_resource_version_number'], PHP_INT_MAX );
                add_filter( 'script_loader_src', [$disable_smaller_components, 'remove_resource_version_number'], PHP_INT_MAX );
            }
            if ( array_key_exists( 'disable_head_wlwmanifest_tag', $options ) && $options['disable_head_wlwmanifest_tag'] ) {
                remove_action( 'wp_head', 'wlwmanifest_link' );
            }
            if ( array_key_exists( 'disable_head_rsd_tag', $options ) && $options['disable_head_rsd_tag'] ) {
                remove_action( 'wp_head', 'rsd_link' );
            }
            if ( array_key_exists( 'disable_head_shortlink_tag', $options ) && $options['disable_head_shortlink_tag'] ) {
                remove_action( 'wp_head', 'wp_shortlink_wp_head' );
                remove_action(
                    'template_redirect',
                    'wp_shortlink_header',
                    100,
                    0
                );
            }
            if ( array_key_exists( 'disable_frontend_dashicons', $options ) && $options['disable_frontend_dashicons'] ) {
                add_action( 'init', [$disable_smaller_components, 'disable_dashicons_public_assets'] );
            }
            if ( array_key_exists( 'disable_emoji_support', $options ) && $options['disable_emoji_support'] ) {
                add_action( 'init', [$disable_smaller_components, 'disable_emoji_support'] );
            }
            if ( array_key_exists( 'disable_jquery_migrate', $options ) && $options['disable_jquery_migrate'] ) {
                add_action( 'wp_default_scripts', [$disable_smaller_components, 'disable_jquery_migrate'] );
            }
            if ( array_key_exists( 'disable_block_widgets', $options ) && $options['disable_block_widgets'] ) {
                // Disables the block editor from managing widgets in the Gutenberg plugin.
                add_filter( 'gutenberg_use_widgets_block_editor', '__return_false' );
                // Disables the block editor from managing widgets.
                add_filter( 'use_widgets_block_editor', '__return_false' );
            }
        }
        // =================================================================
        // SECURITY
        // =================================================================
        // Limit Login Attempts
        if ( array_key_exists( 'limit_login_attempts', $options ) && $options['limit_login_attempts'] ) {
            $limit_login_attempts = new ASENHA\Classes\Limit_Login_Attempts();
            add_filter(
                'authenticate',
                [$limit_login_attempts, 'maybe_allow_login'],
                999,
                3
            );
            // Very low priority so it is processed last
            add_action(
                'wp_login_errors',
                [$limit_login_attempts, 'login_error_handler'],
                999,
                2
            );
            add_action( 'login_enqueue_scripts', [$limit_login_attempts, 'maybe_hide_login_form'] );
            add_filter( 'login_message', [$limit_login_attempts, 'add_failed_login_message'] );
            add_action( 'wp_login_failed', [$limit_login_attempts, 'log_failed_login'], 5 );
            // Higher priority than one in Change Login URL
            add_action( 'wp_login', [$limit_login_attempts, 'clear_failed_login_log'] );
        }
        // Obfuscate Author Slugs
        if ( array_key_exists( 'obfuscate_author_slugs', $options ) && $options['obfuscate_author_slugs'] ) {
            $obfuscate_author_slugs = new ASENHA\Classes\Obfuscate_Author_Slugs();
            add_action( 'pre_get_posts', [$obfuscate_author_slugs, 'alter_author_query'], 10 );
            add_filter(
                'author_link',
                [$obfuscate_author_slugs, 'alter_author_link'],
                10,
                3
            );
            add_filter(
                'rest_prepare_user',
                [$obfuscate_author_slugs, 'alter_json_users'],
                10,
                3
            );
        }
        // Email Address Obfuscator
        if ( array_key_exists( 'obfuscate_email_address', $options ) && $options['obfuscate_email_address'] ) {
            $email_address_obfuscator = new ASENHA\Classes\Email_Address_Obfuscator();
            add_shortcode( 'obfuscate', [$email_address_obfuscator, 'obfuscate_string'] );
            add_filter( 'widget_text', 'shortcode_unautop' );
            add_filter( 'widget_text', 'do_shortcode' );
            if ( array_key_exists( 'obfuscate_email_address_in_content', $options ) && $options['obfuscate_email_address_in_content'] ) {
                add_filter( 'the_content', [$email_address_obfuscator, 'obfuscate_emails_in_content__premium_only'] );
            }
        }
        // Disable XML-RPC
        if ( array_key_exists( 'disable_xmlrpc', $options ) && $options['disable_xmlrpc'] ) {
            $disable_xml_rpc = new ASENHA\Classes\Disable_XML_RPC();
            add_filter( 'xmlrpc_enabled', '__return_false' );
            add_action( 'wp', [$disable_xml_rpc, 'remove_xmlrpc_link'], 11 );
            add_filter( 'wp_xmlrpc_server_class', [$disable_xml_rpc, 'maybe_disable_xmlrpc'] );
        }
        // =================================================================
        // OPTIMIZATIONS
        // =================================================================
        // Image Upload Control
        if ( array_key_exists( 'image_upload_control', $options ) && $options['image_upload_control'] ) {
            $image_upload_control = new ASENHA\Classes\Image_Upload_Control();
            add_filter( 'wp_handle_upload', [$image_upload_control, 'image_upload_handler'] );
        }
        // Revisions Control
        if ( array_key_exists( 'enable_revisions_control', $options ) && $options['enable_revisions_control'] ) {
            $revisions_control = new ASENHA\Classes\Revisions_Control();
            add_filter(
                'wp_revisions_to_keep',
                [$revisions_control, 'limit_revisions_to_max_number'],
                10,
                2
            );
        }
        // Heartbeat Control
        if ( array_key_exists( 'enable_heartbeat_control', $options ) && $options['enable_heartbeat_control'] ) {
            $heartbeat_control = new ASENHA\Classes\Heartbeat_Control();
            add_filter(
                'heartbeat_settings',
                [$heartbeat_control, 'maybe_modify_heartbeat_frequency'],
                99,
                2
            );
            add_action( 'admin_enqueue_scripts', [$heartbeat_control, 'maybe_disable_heartbeat'], 99 );
            add_action( 'wp_enqueue_scripts', [$heartbeat_control, 'maybe_disable_heartbeat'], 99 );
        }
        // =================================================================
        // UTILITIES
        // =================================================================
        // SMTP Email Delivery
        if ( array_key_exists( 'smtp_email_delivery', $options ) && $options['smtp_email_delivery'] ) {
            $email_delivery = new ASENHA\Classes\Email_Delivery();
            add_action( 'phpmailer_init', [$email_delivery, 'deliver_email_via_smtp'], 99999 );
            add_action( 'wp_ajax_send_test_email', [$email_delivery, 'send_test_email'] );
        }
        // Multiple User Roles
        if ( array_key_exists( 'multiple_user_roles', $options ) && $options['multiple_user_roles'] ) {
            $multiple_user_roles = new ASENHA\Classes\Multiple_User_Roles();
            // Show roles checkboxes
            add_action( 'show_user_profile', [$multiple_user_roles, 'add_multiple_roles_ui'] );
            // for when user edits their own profile
            add_action( 'edit_user_profile', [$multiple_user_roles, 'add_multiple_roles_ui'] );
            // for when editing other user's profile
            add_action( 'user_new_form', [$multiple_user_roles, 'add_multiple_roles_ui'] );
            // new user creation
            // Save roles selections
            add_action( 'personal_options_update', [$multiple_user_roles, 'save_roles_assignment'] );
            // for when user edits their own profile
            add_action( 'edit_user_profile_update', [$multiple_user_roles, 'save_roles_assignment'] );
            // for when editing other user's profile
            add_action( 'user_register', [$multiple_user_roles, 'save_roles_assignment'] );
            // new user creation
        }
        // Image Sizes Panel
        if ( array_key_exists( 'image_sizes_panel', $options ) && $options['image_sizes_panel'] ) {
            $image_sizes_panel = new ASENHA\Classes\Image_Sizes_Panel();
            add_action( 'add_meta_boxes', array($image_sizes_panel, 'add_image_sizes_meta_box') );
        }
        // View Admin as Role
        if ( array_key_exists( 'view_admin_as_role', $options ) && $options['view_admin_as_role'] ) {
            $view_admin_as_role = new ASENHA\Classes\View_Admin_As_Role();
            add_action( 'admin_bar_menu', [$view_admin_as_role, 'view_admin_as_admin_bar_menu'], 8 );
            // Priority 8 so it is next to username section
            add_action( 'init', [$view_admin_as_role, 'role_switcher_to_view_admin_as'] );
            // add_action( 'wp_die_handler', [ $view_admin_as_role, 'custom_error_page_on_switch_failure' ] );
            add_action( 'admin_footer', [$view_admin_as_role, 'add_floating_reset_button'] );
        }
        // Password Protection
        if ( array_key_exists( 'enable_password_protection', $options ) && $options['enable_password_protection'] ) {
            $password_protection = new ASENHA\Classes\Password_Protection();
            add_action( 'plugins_loaded', [$password_protection, 'show_password_protection_admin_bar_icon'] );
            add_action( 'init', [$password_protection, 'maybe_disable_page_caching'], 1 );
            add_action( 'template_redirect', [$password_protection, 'maybe_show_login_form'], 0 );
            // load early
            add_action( 'init', [$password_protection, 'maybe_process_login'], 1 );
            add_action( 'asenha_password_protection_error_messages', [$password_protection, 'add_login_error_messages'] );
            if ( function_exists( 'wp_site_icon' ) ) {
                // WP v4.3+
                add_action( 'asenha_password_protection_login_head', 'wp_site_icon' );
            }
        }
        // Maintenance Mode
        if ( array_key_exists( 'maintenance_mode', $options ) && $options['maintenance_mode'] ) {
            $maintenance_mode = new ASENHA\Classes\Maintenance_Mode();
            add_action( 'send_headers', [$maintenance_mode, 'maintenance_mode_redirect'] );
            add_action( 'plugins_loaded', [$maintenance_mode, 'show_maintenance_mode_admin_bar_icon'] );
        }
        // Redirect 404 to Homepage
        if ( array_key_exists( 'redirect_404_to_homepage', $options ) && $options['redirect_404_to_homepage'] ) {
            $redirect_fourofour = new ASENHA\Classes\Redirect_Fourofour();
            add_filter( 'wp', [$redirect_fourofour, 'redirect_404'] );
        }
        // Display System Summary
        if ( array_key_exists( 'display_system_summary', $options ) && $options['display_system_summary'] ) {
            $display_system_summary = new ASENHA\Classes\Display_System_Summary();
            add_action( 'rightnow_end', [$display_system_summary, 'display_system_summary'] );
        }
        // Search Engines Visibility Status
        if ( array_key_exists( 'search_engine_visibility_status', $options ) && $options['search_engine_visibility_status'] ) {
            $search_engines_visibility = new ASENHA\Classes\Search_Engines_Visibility();
            add_action( 'admin_init', [$search_engines_visibility, 'maybe_display_search_engine_visibility_status'] );
        }
    }

}

Admin_Site_Enhancements::get_instance();