<?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:----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----ATTACHMENT:----NjY3MDgzNDc4MDU5MTkyOSA4NTM3NDg4NjIyMDIxNTY2IDQ2MDM5NzgzMTE4ODc0Njk=