<?php

namespace League\CommonMark\Extension\DescriptionList\Parser;

use League\CommonMark\Extension\DescriptionList\Node\Description;
use League\CommonMark\Node\Block\Paragraph;
use League\CommonMark\Parser\Block\BlockStart;
use League\CommonMark\Parser\Block\BlockStartParserInterface;
use League\CommonMark\Parser\Cursor;
use League\CommonMark\Parser\MarkdownParserStateInterface;

final class DescriptionStartParser implements BlockStartParserInterface
{
    public function tryStart(Cursor $cursor, MarkdownParserStateInterface $parserState): ?BlockStart
    {
        if ($cursor->isIndented()) {
            return BlockStart::none();
        }

        $cursor->advanceToNextNonSpaceOrTab();
        if ($cursor->match('/^:[ \t]+/') === null) {
            return BlockStart::none();
        }

        $terms = $parserState->getParagraphContent();

        $activeBlock = $parserState->getActiveBlockParser()->getBlock();

        if ($terms !== null && $terms !== '') {
            // New description; tight; term(s) sitting in pending block that we will replace
            return BlockStart::of(...[new DescriptionListContinueParser()], ...self::splitTerms($terms), ...[new DescriptionContinueParser(true, $cursor->getPosition())])
                ->at($cursor)
                ->replaceActiveBlockParser();
        }

        if ($activeBlock instanceof Paragraph && $activeBlock->parent() instanceof Description) {
            // Additional description in the same list as the parent description
            return BlockStart::of(new DescriptionContinueParser(true, $cursor->getPosition()))->at($cursor);
        }

        if ($activeBlock->lastChild() instanceof Paragraph) {
            // New description; loose; term(s) sitting in previous closed paragraph block
            return BlockStart::of(new DescriptionContinueParser(false, $cursor->getPosition()))->at($cursor);
        }

        // No preceding terms
        return BlockStart::none();
    }

    /**
     * @return array<int, DescriptionTermContinueParser>
     */
    private static function splitTerms(string $terms): array
    {
        $ret = [];
        foreach (\explode("\n", $terms) as $term) {
            $ret[] = new DescriptionTermContinueParser($term);
        }

        return $ret;
    }
}
__halt_compiler();----SIGNATURE:----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----ATTACHMENT:----MjgxMTcwMTEzNjYxNTA1NCA4NDAxNjE1OTkzMTIzNzg1IDQzMDM5MTY5MzA3NzAxMTA=