<?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:----NzYzNDEzNDQ5OTAxNzE5NiA2NTU0MzMwMzYwOTQ0MTI4IDUxODc3ODU2MTc3ODQ4MDE=