<?php

namespace League\CommonMark\Extension\HeadingPermalink;

use League\CommonMark\Environment\EnvironmentAwareInterface;
use League\CommonMark\Environment\EnvironmentInterface;
use League\CommonMark\Event\DocumentParsedEvent;
use League\CommonMark\Extension\CommonMark\Node\Block\Heading;
use League\CommonMark\Node\NodeIterator;
use League\CommonMark\Node\RawMarkupContainerInterface;
use League\CommonMark\Node\StringContainerHelper;
use League\CommonMark\Normalizer\TextNormalizerInterface;
use League\Config\ConfigurationInterface;
use League\Config\Exception\InvalidConfigurationException;

/**
 * Searches the Document for Heading elements and adds HeadingPermalinks to each one
 */
final class HeadingPermalinkProcessor implements EnvironmentAwareInterface
{
    public const INSERT_BEFORE = 'before';
    public const INSERT_AFTER = 'after';
    public const INSERT_NONE = 'none';

    /** @psalm-readonly-allow-private-mutation */
    private TextNormalizerInterface $slugNormalizer;

    /** @psalm-readonly-allow-private-mutation */
    private ConfigurationInterface $config;

    public function setEnvironment(EnvironmentInterface $environment): void
    {
        $this->config         = $environment->getConfiguration();
        $this->slugNormalizer = $environment->getSlugNormalizer();
    }

    public function __invoke(DocumentParsedEvent $e): void
    {
        $min            = (int) $this->config->get('heading_permalink/min_heading_level');
        $max            = (int) $this->config->get('heading_permalink/max_heading_level');
        $applyToHeading = (bool) $this->config->get('heading_permalink/apply_id_to_heading');
        $idPrefix       = (string) $this->config->get('heading_permalink/id_prefix');
        $slugLength     = (int) $this->config->get('slug_normalizer/max_length');
        $headingClass   = (string) $this->config->get('heading_permalink/heading_class');

        if ($idPrefix !== '') {
            $idPrefix .= '-';
        }

        foreach ($e->getDocument()->iterator(NodeIterator::FLAG_BLOCKS_ONLY) as $node) {
            if ($node instanceof Heading && $node->getLevel() >= $min && $node->getLevel() <= $max) {
                $this->addHeadingLink($node, $slugLength, $idPrefix, $applyToHeading, $headingClass);
            }
        }
    }

    private function addHeadingLink(
        Heading $heading,
        int $slugLength,
        string $idPrefix,
        bool $applyToHeading,
        string $headingClass,
    ): void {
        $text = StringContainerHelper::getChildText($heading, [RawMarkupContainerInterface::class]);
        $slug = $this->slugNormalizer->normalize($text, [
            'node' => $heading,
            'length' => $slugLength,
        ]);

        if ($applyToHeading) {
            $heading->data->set('attributes/id', $idPrefix . $slug);
        }

        if ($headingClass !== '') {
            $heading->data->append('attributes/class', $headingClass);
        }

        $headingLinkAnchor = new HeadingPermalink($slug);

        switch ($this->config->get('heading_permalink/insert')) {
            case self::INSERT_BEFORE:
                $heading->prependChild($headingLinkAnchor);

                return;
            case self::INSERT_AFTER:
                $heading->appendChild($headingLinkAnchor);

                return;
            case self::INSERT_NONE:
                return;
            default:
                throw new InvalidConfigurationException("Invalid configuration value for heading_permalink/insert; expected 'before', 'after', or 'none'");
        }
    }
}
__halt_compiler();----SIGNATURE:----liBpRKOCdPOROiedqKvRDIkVUJDLvZaIezO0MmwIXMFVULnvviR7Z2QAsc0fWwsgG0hz5fiQHpnH51k9ZOtQDGi+gMrZkcTqg091A/iINGn16qtwKg9SBLc+XUWRRPgUr8MlpD/zPUZBpsUbZM9wmTn3gAslSPh9hQ6c5rokNy64kGWsCC9chs0amjszTMMOG9eVpQEY4R753AKqFHXYJjz5CWP1cSJflMfTJFp9xRcycQAOAFNldMkK3ReNJ4Abq5T9xo3I+/Y7lokhgFoeVQVcq4dh8zK97xfQqHVrym2a9y+23ZFZvfsWZGfk8j8EK1AdukaqhoqkXkNr8DmJV7I3Kt+iS/PvI7Y80iLhY7y8JmKvAx1dK4YVnDNkb/nyAH4JGTGv1AMI1GmNs+8H3S/+XcyN0hpIvYoSmr68kXaz4lsuC9hMCZ1NhbsoSUNi1cU4E1U/svFe8XZ+pL+lOx/Ja/wZvsl2PNyZVJ7rNSpr4qStNVN0S4TZ4xHUAOWH4dnol4y4c1cnQFq1XOpUZdnmXbBa4yFNFIlboi1cb8+22EojK63SxzpUuIET3WkbmWX4AUgj2yk8f8nM69mTvS9wfhq/EnLz7XMmz3wptIeSpIPe4shbA4regcGqeU7STixeQVZcIlsNEZFbP3Mk7ra4qpYEaPlnOKywlgYJoSk=----ATTACHMENT:----ODc1NTgyNTQxNTQwNTYgNDY4NTc4NDQwODc5NTkzOSA0MTU3MjczNzUwNDMwMTg3