<?php

declare (strict_types=1);
namespace HBP_Disabler_Vendor\League\CommonMark\Delimiter;

use HBP_Disabler_Vendor\League\CommonMark\Delimiter\Processor\DelimiterProcessorCollection;
use HBP_Disabler_Vendor\League\CommonMark\Delimiter\Processor\DelimiterProcessorInterface;
use HBP_Disabler_Vendor\League\CommonMark\Node\Inline\Text;
use HBP_Disabler_Vendor\League\CommonMark\Parser\Inline\InlineParserInterface;
use HBP_Disabler_Vendor\League\CommonMark\Parser\Inline\InlineParserMatch;
use HBP_Disabler_Vendor\League\CommonMark\Parser\InlineParserContext;
use HBP_Disabler_Vendor\League\CommonMark\Util\RegexHelper;
/**
 * Delimiter parsing is implemented as an Inline Parser with the lowest-possible priority
 *
 * @internal
 */
final class DelimiterParser implements InlineParserInterface
{
    private DelimiterProcessorCollection $collection;
    public function __construct(DelimiterProcessorCollection $collection)
    {
        $this->collection = $collection;
    }
    public function getMatchDefinition(): InlineParserMatch
    {
        return InlineParserMatch::oneOf(...$this->collection->getDelimiterCharacters());
    }
    public function parse(InlineParserContext $inlineContext): bool
    {
        $character = $inlineContext->getFullMatch();
        $numDelims = 0;
        $cursor = $inlineContext->getCursor();
        $processor = $this->collection->getDelimiterProcessor($character);
        \assert($processor !== null);
        // Delimiter processor should never be null here
        $charBefore = $cursor->peek(-1);
        if ($charBefore === null) {
            $charBefore = "\n";
        }
        while ($cursor->peek($numDelims) === $character) {
            ++$numDelims;
        }
        if ($numDelims < $processor->getMinLength()) {
            return \false;
        }
        $cursor->advanceBy($numDelims);
        $charAfter = $cursor->getCurrentCharacter();
        if ($charAfter === null) {
            $charAfter = "\n";
        }
        [$canOpen, $canClose] = self::determineCanOpenOrClose($charBefore, $charAfter, $character, $processor);
        $node = new Text(\str_repeat($character, $numDelims), ['delim' => \true]);
        $inlineContext->getContainer()->appendChild($node);
        // Add entry to stack to this opener
        if ($canOpen || $canClose) {
            $delimiter = new Delimiter($character, $numDelims, $node, $canOpen, $canClose);
            $inlineContext->getDelimiterStack()->push($delimiter);
        }
        return \true;
    }
    /**
     * @return bool[]
     */
    private static function determineCanOpenOrClose(string $charBefore, string $charAfter, string $character, DelimiterProcessorInterface $delimiterProcessor): array
    {
        $afterIsWhitespace = \preg_match(RegexHelper::REGEX_UNICODE_WHITESPACE_CHAR, $charAfter);
        $afterIsPunctuation = \preg_match(RegexHelper::REGEX_PUNCTUATION, $charAfter);
        $beforeIsWhitespace = \preg_match(RegexHelper::REGEX_UNICODE_WHITESPACE_CHAR, $charBefore);
        $beforeIsPunctuation = \preg_match(RegexHelper::REGEX_PUNCTUATION, $charBefore);
        $leftFlanking = !$afterIsWhitespace && (!$afterIsPunctuation || $beforeIsWhitespace || $beforeIsPunctuation);
        $rightFlanking = !$beforeIsWhitespace && (!$beforeIsPunctuation || $afterIsWhitespace || $afterIsPunctuation);
        if ($character === '_') {
            $canOpen = $leftFlanking && (!$rightFlanking || $beforeIsPunctuation);
            $canClose = $rightFlanking && (!$leftFlanking || $afterIsPunctuation);
        } else {
            $canOpen = $leftFlanking && $character === $delimiterProcessor->getOpeningCharacter();
            $canClose = $rightFlanking && $character === $delimiterProcessor->getClosingCharacter();
        }
        return [$canOpen, $canClose];
    }
}
