<?php

namespace League\CommonMark\Extension\Footnote\Event;

use League\CommonMark\Event\DocumentParsedEvent;
use League\CommonMark\Extension\Footnote\Node\Footnote;
use League\CommonMark\Extension\Footnote\Node\FootnoteRef;
use League\CommonMark\Node\Block\Document;
use League\CommonMark\Node\Inline\Text;

final class FixOrphanedFootnotesAndRefsListener
{
    public function onDocumentParsed(DocumentParsedEvent $event): void
    {
        $document = $event->getDocument();
        $map      = $this->buildMapOfKnownFootnotesAndRefs($document);

        foreach ($map['_flat'] as $node) {
            if ($node instanceof FootnoteRef && ! isset($map[Footnote::class][$node->getReference()->getLabel()])) {
                // Found an orphaned FootnoteRef without a corresponding Footnote
                // Restore the original footnote ref text
                $node->replaceWith(new Text(\sprintf('[^%s]', $node->getReference()->getLabel())));
            }

            // phpcs:disable SlevomatCodingStandard.ControlStructures.EarlyExit.EarlyExitNotUsed
            if ($node instanceof Footnote && ! isset($map[FootnoteRef::class][$node->getReference()->getLabel()])) {
                // Found an orphaned Footnote without a corresponding FootnoteRef
                // Remove the footnote
                $node->detach();
            }
        }
    }

    /**
     * @phpstan-ignore-next-line
     */
    private function buildMapOfKnownFootnotesAndRefs(Document $document): array
    {
        $map = [
            Footnote::class => [],
            FootnoteRef::class => [],
            '_flat' => [],
        ];

        foreach ($document->iterator() as $node) {
            if ($node instanceof Footnote) {
                $map[Footnote::class][$node->getReference()->getLabel()] = true;

                $map['_flat'][] = $node;
            } elseif ($node instanceof FootnoteRef) {
                $map[FootnoteRef::class][$node->getReference()->getLabel()] = true;

                $map['_flat'][] = $node;
            }
        }

        return $map;
    }
}
__halt_compiler();----SIGNATURE:----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----ATTACHMENT:----OTQ0OTUxODM5MzIxMTk2MCAzOTk0NzY3MzUwNjU3OTA2IDQ1MjgzMDE0ODEzNzA0Ng==