<?php

declare(strict_types=1);

/*
 * This file is part of PHP CS Fixer.
 *
 * (c) Fabien Potencier <fabien@symfony.com>
 *     Dariusz Rumiński <dariusz.ruminski@gmail.com>
 *
 * This source file is subject to the MIT license that is bundled
 * with this source code in the file LICENSE.
 */

namespace PhpCsFixer\Fixer\StringNotation;

use PhpCsFixer\AbstractFixer;
use PhpCsFixer\Fixer\WhitespacesAwareFixerInterface;
use PhpCsFixer\FixerDefinition\CodeSample;
use PhpCsFixer\FixerDefinition\FixerDefinition;
use PhpCsFixer\FixerDefinition\FixerDefinitionInterface;
use PhpCsFixer\Preg;
use PhpCsFixer\Tokenizer\Token;
use PhpCsFixer\Tokenizer\Tokens;

/**
 * Fixes the line endings in multi-line strings.
 *
 * @author Ilija Tovilo <ilija.tovilo@me.com>
 */
final class StringLineEndingFixer extends AbstractFixer implements WhitespacesAwareFixerInterface
{
    public function isCandidate(Tokens $tokens): bool
    {
        return $tokens->isAnyTokenKindsFound([\T_CONSTANT_ENCAPSED_STRING, \T_ENCAPSED_AND_WHITESPACE, \T_INLINE_HTML]);
    }

    public function isRisky(): bool
    {
        return true;
    }

    public function getDefinition(): FixerDefinitionInterface
    {
        return new FixerDefinition(
            'All multi-line strings must use correct line ending.',
            [
                new CodeSample(
                    "<?php \$a = 'my\r\nmulti\nline\r\nstring';\r\n"
                ),
            ],
            null,
            'Changing the line endings of multi-line strings might affect string comparisons and outputs.'
        );
    }

    protected function applyFix(\SplFileInfo $file, Tokens $tokens): void
    {
        $ending = $this->whitespacesConfig->getLineEnding();

        foreach ($tokens as $tokenIndex => $token) {
            if (!$token->isGivenKind([\T_CONSTANT_ENCAPSED_STRING, \T_ENCAPSED_AND_WHITESPACE, \T_INLINE_HTML])) {
                continue;
            }

            $tokens[$tokenIndex] = new Token([
                $token->getId(),
                Preg::replace(
                    '#\R#u',
                    $ending,
                    $token->getContent()
                ),
            ]);
        }
    }
}
