<?php

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier <fabien@symfony.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Symfony\Component\CssSelector\XPath\Extension;

use Symfony\Component\CssSelector\XPath\Translator;
use Symfony\Component\CssSelector\XPath\XPathExpr;

/**
 * XPath expression translator attribute extension.
 *
 * This component is a port of the Python cssselect library,
 * which is copyright Ian Bicking, @see https://github.com/SimonSapin/cssselect.
 *
 * @author Jean-François Simon <jeanfrancois.simon@sensiolabs.com>
 *
 * @internal
 */
class AttributeMatchingExtension extends AbstractExtension
{
    public function getAttributeMatchingTranslators(): array
    {
        return [
            'exists' => $this->translateExists(...),
            '=' => $this->translateEquals(...),
            '~=' => $this->translateIncludes(...),
            '|=' => $this->translateDashMatch(...),
            '^=' => $this->translatePrefixMatch(...),
            '$=' => $this->translateSuffixMatch(...),
            '*=' => $this->translateSubstringMatch(...),
            '!=' => $this->translateDifferent(...),
        ];
    }

    public function translateExists(XPathExpr $xpath, string $attribute, ?string $value): XPathExpr
    {
        return $xpath->addCondition($attribute);
    }

    public function translateEquals(XPathExpr $xpath, string $attribute, ?string $value): XPathExpr
    {
        return $xpath->addCondition(sprintf('%s = %s', $attribute, Translator::getXpathLiteral($value)));
    }

    public function translateIncludes(XPathExpr $xpath, string $attribute, ?string $value): XPathExpr
    {
        return $xpath->addCondition($value ? sprintf(
            '%1$s and contains(concat(\' \', normalize-space(%1$s), \' \'), %2$s)',
            $attribute,
            Translator::getXpathLiteral(' '.$value.' ')
        ) : '0');
    }

    public function translateDashMatch(XPathExpr $xpath, string $attribute, ?string $value): XPathExpr
    {
        return $xpath->addCondition(sprintf(
            '%1$s and (%1$s = %2$s or starts-with(%1$s, %3$s))',
            $attribute,
            Translator::getXpathLiteral($value),
            Translator::getXpathLiteral($value.'-')
        ));
    }

    public function translatePrefixMatch(XPathExpr $xpath, string $attribute, ?string $value): XPathExpr
    {
        return $xpath->addCondition($value ? sprintf(
            '%1$s and starts-with(%1$s, %2$s)',
            $attribute,
            Translator::getXpathLiteral($value)
        ) : '0');
    }

    public function translateSuffixMatch(XPathExpr $xpath, string $attribute, ?string $value): XPathExpr
    {
        return $xpath->addCondition($value ? sprintf(
            '%1$s and substring(%1$s, string-length(%1$s)-%2$s) = %3$s',
            $attribute,
            \strlen($value) - 1,
            Translator::getXpathLiteral($value)
        ) : '0');
    }

    public function translateSubstringMatch(XPathExpr $xpath, string $attribute, ?string $value): XPathExpr
    {
        return $xpath->addCondition($value ? sprintf(
            '%1$s and contains(%1$s, %2$s)',
            $attribute,
            Translator::getXpathLiteral($value)
        ) : '0');
    }

    public function translateDifferent(XPathExpr $xpath, string $attribute, ?string $value): XPathExpr
    {
        return $xpath->addCondition(sprintf(
            $value ? 'not(%1$s) or %1$s != %2$s' : '%s != %s',
            $attribute,
            Translator::getXpathLiteral($value)
        ));
    }

    public function getName(): string
    {
        return 'attribute-matching';
    }
}
