<?php

/*
 * 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\CastNotation;

use PhpCsFixer\AbstractFixer;
use PhpCsFixer\FixerDefinition\CodeSample;
use PhpCsFixer\FixerDefinition\FixerDefinition;
use PhpCsFixer\Tokenizer\Token;
use PhpCsFixer\Tokenizer\Tokens;

/**
 * @author Dariusz Rumiński <dariusz.ruminski@gmail.com>
 */
final class CastSpacesFixer extends AbstractFixer
{
    /**
     * {@inheritdoc}
     */
    public function getDefinition()
    {
        return new FixerDefinition(
            'A single space should be between cast and variable.',
            array(new CodeSample("<?php\n\$bar = ( string )  \$a;\n\$foo = (int)\$b;"))
        );
    }

    /**
     * {@inheritdoc}
     */
    public function getPriority()
    {
        // should be run after the NoShortBoolCastFixer
        return -10;
    }

    /**
     * {@inheritdoc}
     */
    public function isCandidate(Tokens $tokens)
    {
        return $tokens->isAnyTokenKindsFound(Token::getCastTokenKinds());
    }

    /**
     * {@inheritdoc}
     */
    protected function applyFix(\SplFileInfo $file, Tokens $tokens)
    {
        static $insideCastSpaceReplaceMap = array(
            ' ' => '',
            "\t" => '',
            "\n" => '',
            "\r" => '',
            "\0" => '',
            "\x0B" => '',
        );

        foreach ($tokens as $index => $token) {
            if ($token->isCast()) {
                $tokens[$index] = new Token(array(
                    $token->getId(),
                    strtr($token->getContent(), $insideCastSpaceReplaceMap),
                ));

                // force single whitespace after cast token:
                if ($tokens[$index + 1]->isWhitespace(" \t")) {
                    // - if next token is whitespaces that contains only spaces and tabs - override next token with single space
                    $tokens[$index + 1] = new Token(array(T_WHITESPACE, ' '));
                } elseif (!$tokens[$index + 1]->isWhitespace()) {
                    // - if next token is not whitespaces that contains spaces, tabs and new lines - append single space to current token
                    $tokens->insertAt($index + 1, new Token(array(T_WHITESPACE, ' ')));
                }
            }
        }
    }
}
