<?php
Kirby::plugin('adrienpayet/process-links', [
  'fieldMethods' => [
      'processLinks' => function ($field) {
          $dom = new DOMDocument();
          @$dom->loadHTML(mb_convert_encoding($field->value(), 'HTML-ENTITIES', 'UTF-8'), LIBXML_HTML_NOIMPLIED | LIBXML_HTML_NODEFDTD);
          $anchorTags = $dom->getElementsByTagName('a');
          $site = site();

          for ($i = $anchorTags->length - 1; $i >= 0; $i--) {
              $anchorTag = $anchorTags->item($i);
              $href = $anchorTag->getAttribute('href');
              $getIdPattern = '/@\/page\/(.*)/';
              $regexResult = preg_match($getIdPattern, $href, $matches);
              $isInternalPageLink = $regexResult && isset($matches[1]);
              $isMailto = str_contains($href, 'mailto');
              $isNote = !str_contains($href, 'http');

              if (!$isMailto) {
                if ($isInternalPageLink) {                  
                  processInternalLink($anchorTag, $site, $matches[1]);
                } elseif ($isNote) {
                    processNote($dom, $anchorTag, $href);
                } else {
                    $anchorTag->setAttribute('target', '_blank');
                }
              }
          }
          return $dom->saveHTML();
      }
  ]
]);

function processInternalLink($anchorTag, $site, $targetId) {
  try {
      $targetPage = $site->find('page://' . $targetId);
      if (!$targetPage) {
          throw new Exception("No internal page found.");
      }
      $anchorTag->removeAttribute('target');
      $attributes = [
          'href' => $targetPage->url(),
          'class' => 'internal-link',
          'data-size' => formatSize($targetPage->size()->toInt())
      ];
      foreach ($attributes as $key => $value) {
          $anchorTag->setAttribute($key, $value);
      }
  } catch (Exception $e) {
      error_log($e->getMessage());
  }
}


function processNote($dom, $anchorTag, $href) {
    $note = $dom->createElement('span');
    $note->setAttribute('class', 'note');
    $button = $dom->createElement('button');
    $text = new DOMText($anchorTag->nodeValue);
    $button->appendChild($text);
    $note->appendChild($button);
    $details = $dom->createElement('span');
    $details->setAttribute('class', 'details hide');
    $detailsText = new DOMText(' ' . urldecode($href));
    $details->appendChild($detailsText);
    $note->appendChild($details);
    $anchorTag->parentNode->replaceChild($note, $anchorTag);
}