<?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\FunctionNotation;

use PhpCsFixer\AbstractFixer;
use PhpCsFixer\FixerDefinition\CodeSample;
use PhpCsFixer\FixerDefinition\FixerDefinition;
use PhpCsFixer\FixerDefinition\FixerDefinitionInterface;
use PhpCsFixer\Tokenizer\Analyzer\Analysis\TypeAnalysis;
use PhpCsFixer\Tokenizer\Analyzer\FunctionsAnalyzer;
use PhpCsFixer\Tokenizer\Tokens;
/**
 * @author Dariusz Rumiński <dariusz.ruminski@gmail.com>
 */
final class FunctionTypehintSpaceFixer extends AbstractFixer
{
    /**
     * {@inheritdoc}
     */
    public function getDefinition() : FixerDefinitionInterface
    {
        return new FixerDefinition('Ensure single space between function\'s argument and its typehint.', [new CodeSample("<?php\nfunction sample(array\$a)\n{}\n"), new CodeSample("<?php\nfunction sample(array  \$a)\n{}\n")]);
    }
    /**
     * {@inheritdoc}
     */
    public function isCandidate(Tokens $tokens) : bool
    {
        return $tokens->isAnyTokenKindsFound([\T_FUNCTION, \T_FN]);
    }
    /**
     * {@inheritdoc}
     */
    protected function applyFix(\SplFileInfo $file, Tokens $tokens) : void
    {
        $functionsAnalyzer = new FunctionsAnalyzer();
        for ($index = $tokens->count() - 1; $index >= 0; --$index) {
            $token = $tokens[$index];
            if (!$token->isGivenKind([\T_FUNCTION, \T_FN])) {
                continue;
            }
            $arguments = $functionsAnalyzer->getFunctionArguments($tokens, $index);
            foreach (\array_reverse($arguments) as $argument) {
                $type = $argument->getTypeAnalysis();
                if (!$type instanceof TypeAnalysis) {
                    continue;
                }
                $tokens->ensureWhitespaceAtIndex($type->getEndIndex() + 1, 0, ' ');
            }
        }
    }
}
