<?php

// Exit if accessed directly.
if (! defined('ABSPATH')) {
  exit;
}
if (! function_exists('bs_ends_with')) {
  /**
   * This function is only available in PHP 8.0 and above.
   *
   * @param {string} $haystack
   * @param {string} $needle
   * @return {boolean}
   */
  function bs_ends_with($haystack, $needle)
  {
    $needle_len = strlen($needle);
    return ($needle_len === 0 || 0 === substr_compare($haystack, $needle, -$needle_len));
  }
}

if (! class_exists('blockspare_Google_Fonts')) {
  class blockspare_Google_Fonts
  {

    public static $google_fonts = [];

    function __construct()
    {

      add_filter('render_block', array($this, 'bs_gather_google_fonts'), 10, 2);
    }

    public function bs_gather_google_fonts($block_content, $block)
    {
      if ($block_content === null) {
        return $block_content;
      }

      $block_name = isset($block['blockName']) ? $block['blockName'] : '';
      if ($this->is_blockspare_block($block_name) && is_array($block['attrs'])) {
        // if (stripos($block_content, 'family') !== false) {
        foreach ($block['attrs'] as $attr_name => $font_name) {
          if (bs_ends_with(strtolower($attr_name), 'fontfamily')) {
            self::register_font($font_name);
          }
        }
        //}
      }

      return $block_content;
    }

    public static function enqueue_frontend_block_fonts()
    {
      self::enqueue_google_fonts(array_unique(self::$google_fonts));
    }

    public static function is_web_font($font_name)
    {

      return ! in_array(strtolower($font_name), ['Arial', 'Times New Roman', 'Helvetica', 'Georgia']);
    }

    public static function is_blockspare_block($block_name)
    {
      if (!empty($block_name)) {
        return strpos($block_name, 'blockspare/') === 0;
      }
      return  false;
    }

    public static function register_font($font_name)
    {
      if (! self::is_web_font($font_name)) {
        return;
      }

      if (! in_array($font_name, self::$google_fonts)) {
        // Allow themes to disable enqueuing fonts, helpful for custom fonts.
        if (apply_filters('blockspare_enqueue_font', true, $font_name)) {
          self::$google_fonts[] = $font_name;

          // Enqueue the fonts in the footer.
          add_filter('wp_footer', array('blockspare_Google_Fonts', 'enqueue_frontend_block_fonts'));
        }
      }
    }


    /**
     * Based on: https://github.com/elementor/elementor/blob/bc251b81afb626c4c47029aea8a762566524a811/includes/frontend.php#L647
     */
    public static function enqueue_google_fonts($google_fonts, $handle = 'blockspare-google-fonts')
    {
      if (! count($google_fonts)) {
        return;
      }

      foreach ($google_fonts as &$font) {
        $font = str_replace(' ', '+', $font) . ':100,100italic,200,200italic,300,300italic,400,400italic,500,500italic,600,600italic,700,700italic,800,800italic,900,900italic';
      }

      $fonts_url = sprintf('https://fonts.googleapis.com/css?family=%s', implode(rawurlencode('|'), $google_fonts));

      $subsets = [
        'ru_RU' => 'cyrillic',
        'bg_BG' => 'cyrillic',
        'he_IL' => 'hebrew',
        'el' => 'greek',
        'vi' => 'vietnamese',
        'uk' => 'cyrillic',
        'cs_CZ' => 'latin-ext',
        'ro_RO' => 'latin-ext',
        'pl_PL' => 'latin-ext',
      ];

      $locale = get_locale();
      if (isset($subsets[$locale])) {
        $fonts_url .= '&subset=' . $subsets[$locale];
      }

      wp_enqueue_style($handle, $fonts_url); // phpcs:ignore WordPress.WP.EnqueuedResourceParameters.MissingVersion
    }
  }

  new blockspare_Google_Fonts();
}