<?php

namespace Yuvayana\Acadlix\Common\Submenu;

use WP_Post;
use WP_Block_Type_Registry;

defined('ABSPATH') || exit();

class Submenu_Lessons
{
  private static $_instance = null;

  protected $_options = [];

  public function __construct()
  {
    $this->_options = [
      'parent_slug' => ACADLIX_SLUG,
      'page_title' => __('Acadlix Lessons', 'acadlix'),
      'menu_title' => __('Lessons', 'acadlix'),
      'capability' => 'acadlix_show_lesson',
      'menu_slug' => 'acadlix_lesson',
      'callback' => [$this, 'lesson_callback'],
      'position' => 800
    ];
  }

  public function get_position()
  {
    return $this->_options['position'] ?? 800;
  }

  public function add_submenu()
  {
    $page = add_submenu_page(
      $this->_options['parent_slug'],
      $this->_options['page_title'],
      $this->_options['menu_title'],
      $this->_options['capability'],
      $this->_options['menu_slug'],
      $this->_options['callback'],
      $this->_options['position']
    );

    add_action("admin_print_scripts-{$page}", [$this, 'admin_print_scripts']);
  }

  public function localize_options()
  {
    global $post;

    // Create a mock post if one doesn't exist so the settings generator doesn't fail
    if (!($post instanceof \WP_Post)) {
      $post = new \WP_Post((object) [
        'ID' => 0,
        'post_type' => 'post',
        'post_status' => 'draft',
      ]);
    }

    // 🌟 THIS IS THE MAGIC NATIVE FUNCTION 🌟
    // It fetches all theme.json configs, flexbox rules, typography, and editor styles
    $editor_settings = get_block_editor_settings(array(), $post);
    $current_user = wp_get_current_user();
    $is_super = is_super_admin($current_user->ID);
    $capabilities = $current_user->exists() ? array_keys(array_filter((array) $current_user->allcaps)) : [];
    return [
      'api_url' => acadlix()->helper()->acadlix_get_api_url(),
      'max_execution_time' => acadlix()->helper()->acadlix_max_execution_time(),
      'nonce' => acadlix()->helper()->acadlix_get_wp_rest_nonce(),
      'settings' => acadlix()->helper()->acadlix_get_all_options(),
      'theme_settings' => acadlix()->helper()->acadlix_get_option('acadlix_theme_settings'),
      'default_img_url' => esc_url(ACADLIX_ASSETS_IMAGE_URL . "demo-course.jpg"),
      'user_id' => get_current_user_id(),
      'isSuperAdmin' => $is_super,
      'capabilities' => $is_super ? ['*'] : $capabilities,
      'acadlix_docs_url' => ACADLIX_DOCUMENTATION_URL,
      'isActive' => acadlix()->license()->isActive ?? false,
      'block_settings' => $editor_settings,
      'isBunnyNetIntegrationActive' => acadlix()->helper()->is_bunny_net_integration_addon_active(),
    ];
  }

  public function admin_print_scripts()
  {
    // 1. SETUP MOCK CONTEXT FIRST (CRITICAL)
    // Third-party plugins check this screen context during script enqueuing!
    global $post, $current_screen;
    $original_post = $post;

    if (!($post instanceof \WP_Post)) {
      $post = new \WP_Post((object) [
        'ID' => 0,
        'post_type' => 'post',
        'post_status' => 'draft',
        'post_title' => '',
        'post_content' => '',
      ]);
    }

    if ($current_screen && method_exists($current_screen, 'is_block_editor')) {
      $current_screen->is_block_editor(true);
    }

    // 2. ENQUEUE CORE SCRIPTS
    wp_enqueue_editor();
    wp_enqueue_media();
    wp_enqueue_script('wp-element');
    wp_enqueue_script('wp-i18n');
    wp_enqueue_script('wp-blocks');
    wp_enqueue_script('wp-block-editor');
    wp_enqueue_script('wp-components');
    wp_enqueue_script('wp-editor');
    wp_enqueue_script('wp-plugins');
    wp_enqueue_script('wp-format-library');
    wp_enqueue_script('wp-api-fetch');
    wp_enqueue_script('wp-server-side-render');

    // 3. THE MAGIC FIX: BOOTSTRAP SERVER-SIDE BLOCK.JSON DATA
    // This feeds the missing 'title' and 'attributes' natively to block.json plugins
    $registry = \WP_Block_Type_Registry::get_instance();
    $server_blocks = [];

    foreach ($registry->get_all_registered() as $block_name => $block_type) {
      if (strpos($block_name, 'core/') === 0) {
        continue;
      }

      // Fallback formatting if title is completely missing
      $fallback_title = ucwords(str_replace(['-', '_'], ' ', explode('/', $block_name)[1] ?? $block_name));
      $block_data = [
        'name' => $block_name,
        'title' => !empty($block_type->title) ? $block_type->title : $fallback_title,
        'category' => !empty($block_type->category) ? $block_type->category : 'widgets',
      ];

      // 🚨 THE CRITICAL FIX: Only attach these if they are not empty!
      // Passing empty arrays here overwrites JS defaults and strips classes like 'wp-block-table'.
      if (!empty($block_type->icon))
        $block_data['icon'] = $block_type->icon;
      if (!empty($block_type->description))
        $block_data['description'] = $block_type->description;
      if (!empty($block_type->supports))
        $block_data['supports'] = $block_type->supports;
      if (!empty($block_type->attributes))
        $block_data['attributes'] = $block_type->attributes;
      if (!empty($block_type->uses_context))
        $block_data['usesContext'] = $block_type->uses_context;
      if (!empty($block_type->provides_context))
        $block_data['providesContext'] = $block_type->provides_context;

      $server_blocks[$block_name] = $block_data;
    }

    // Inject this directly into wp.blocks exactly how WordPress Core does
    $bootstrap_json = wp_json_encode($server_blocks);
    $bootstrap_script = "
        if ( window.wp && window.wp.blocks && window.wp.blocks.unstable__bootstrapServerSideBlockDefinitions ) {
            window.wp.blocks.unstable__bootstrapServerSideBlockDefinitions( {$bootstrap_json} );
        }
    ";
    wp_add_inline_script('wp-blocks', $bootstrap_script, 'after');

    // 4. LOAD ENQUEUED BLOCK STYLES
    wp_enqueue_style('wp-components');
    wp_enqueue_style('wp-block-editor');
    wp_enqueue_style('wp-block-library');
    wp_enqueue_style('wp-block-library-theme');
    wp_enqueue_style('wp-format-library');
    if (wp_style_is('wp-edit-post', 'registered')) {
      wp_enqueue_style('wp-edit-post');
    }

    if (function_exists('wp_get_global_stylesheet')) {
      wp_add_inline_style('wp-block-library', wp_get_global_stylesheet());
    }

    // 5. TRIGGER STANDARD BLOCK ASSETS HOOKS
    if (function_exists('wp_enqueue_registered_block_scripts_and_styles')) {
      wp_enqueue_registered_block_scripts_and_styles();
    }

    do_action('enqueue_block_assets');

    try {
      do_action('enqueue_block_editor_assets');
    } catch (\Throwable $e) {
      error_log('Acadlix enqueue_block_editor_assets exception: ' . $e->getMessage());
    }

    // 6. RESTORE GLOBAL STATE
    $post = $original_post;
    if ($current_screen && method_exists($current_screen, 'is_block_editor')) {
      $current_screen->is_block_editor(false);
    }

    // 7. LOAD YOUR CUSTOM APP ASSETS
    if (function_exists('acadlix') && acadlix()->assets()) {
      acadlix()->assets()->manager()->load_assets('admin_lesson', $this->localize_options());
    }
  }

  public function lesson_callback()
  {
    echo '<div id="acadlix-admin-lesson"><h2>' . esc_html__('Loading...', 'acadlix') . '</h2></div>';
  }

  public static function instance()
  {
    if (is_null(self::$_instance)) {
      self::$_instance = new self();
    }

    return self::$_instance;
  }
}