<?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\Phpdoc;

use PhpCsFixer\AbstractFixer;
use PhpCsFixer\Fixer\ConfigurableFixerInterface;
use PhpCsFixer\FixerConfiguration\FixerConfigurationResolver;
use PhpCsFixer\FixerConfiguration\FixerConfigurationResolverInterface;
use PhpCsFixer\FixerConfiguration\FixerOptionBuilder;
use PhpCsFixer\FixerDefinition\CodeSample;
use PhpCsFixer\FixerDefinition\FixerDefinition;
use PhpCsFixer\FixerDefinition\FixerDefinitionInterface;
use PhpCsFixer\Preg;
use PhpCsFixer\Tokenizer\Token;
use PhpCsFixer\Tokenizer\Tokens;
use Symfony\Component\OptionsResolver\Exception\InvalidOptionsException;
use Symfony\Component\OptionsResolver\Options;

final class PhpdocTagTypeFixer extends AbstractFixer implements ConfigurableFixerInterface
{
    private const TAG_REGEX = '/^(?:
        (?<tag>
            (?:@(?<tag_name>.+?)(?:\s.+)?)
        )
        |
        {(?<inlined_tag>
            (?:@(?<inlined_tag_name>.+?)(?:\s.+)?)
        )}
    )$/x';

    public function isCandidate(Tokens $tokens): bool
    {
        return $tokens->isTokenKindFound(T_DOC_COMMENT);
    }

    public function getDefinition(): FixerDefinitionInterface
    {
        return new FixerDefinition(
            'Forces PHPDoc tags to be either regular annotations or inline.',
            [
                new CodeSample(
                    "<?php\n/**\n * {@api}\n */\n"
                ),
                new CodeSample(
                    "<?php\n/**\n * @inheritdoc\n */\n",
                    ['tags' => ['inheritdoc' => 'inline']]
                ),
            ]
        );
    }

    /**
     * {@inheritdoc}
     *
     * Must run before PhpdocAlignFixer.
     * Must run after AlignMultilineCommentFixer, CommentToPhpdocFixer, PhpdocIndentFixer, PhpdocScalarFixer, PhpdocToCommentFixer, PhpdocTypesFixer.
     */
    public function getPriority(): int
    {
        return 0;
    }

    protected function applyFix(\SplFileInfo $file, Tokens $tokens): void
    {
        if (0 === \count($this->configuration['tags'])) {
            return;
        }

        $regularExpression = sprintf(
            '/({?@(?:%s).*?(?:(?=\s\*\/)|(?=\n)}?))/i',
            implode('|', array_map(
                static fn (string $tag): string => preg_quote($tag, '/'),
                array_keys($this->configuration['tags'])
            ))
        );

        foreach ($tokens as $index => $token) {
            if (!$token->isGivenKind(T_DOC_COMMENT)) {
                continue;
            }

            $parts = Preg::split(
                $regularExpression,
                $token->getContent(),
                -1,
                PREG_SPLIT_DELIM_CAPTURE
            );

            for ($i = 1, $max = \count($parts) - 1; $i < $max; $i += 2) {
                if (!Preg::match(self::TAG_REGEX, $parts[$i], $matches)) {
                    continue;
                }

                if ('' !== $matches['tag']) {
                    $tag = $matches['tag'];
                    $tagName = $matches['tag_name'];
                } else {
                    $tag = $matches['inlined_tag'];
                    $tagName = $matches['inlined_tag_name'];
                }

                $tagName = strtolower($tagName);
                if (!isset($this->configuration['tags'][$tagName])) {
                    continue;
                }

                if ('inline' === $this->configuration['tags'][$tagName]) {
                    $parts[$i] = '{'.$tag.'}';

                    continue;
                }

                if (!$this->tagIsSurroundedByText($parts, $i)) {
                    $parts[$i] = $tag;
                }
            }

            $tokens[$index] = new Token([T_DOC_COMMENT, implode('', $parts)]);
        }
    }

    protected function createConfigurationDefinition(): FixerConfigurationResolverInterface
    {
        return new FixerConfigurationResolver([
            (new FixerOptionBuilder('tags', 'The list of tags to fix.'))
                ->setAllowedTypes(['array'])
                ->setAllowedValues([static function (array $value): bool {
                    foreach ($value as $type) {
                        if (!\in_array($type, ['annotation', 'inline'], true)) {
                            throw new InvalidOptionsException("Unknown tag type \"{$type}\".");
                        }
                    }

                    return true;
                }])
                ->setDefault([
                    'api' => 'annotation',
                    'author' => 'annotation',
                    'copyright' => 'annotation',
                    'deprecated' => 'annotation',
                    'example' => 'annotation',
                    'global' => 'annotation',
                    'inheritDoc' => 'annotation',
                    'internal' => 'annotation',
                    'license' => 'annotation',
                    'method' => 'annotation',
                    'package' => 'annotation',
                    'param' => 'annotation',
                    'property' => 'annotation',
                    'return' => 'annotation',
                    'see' => 'annotation',
                    'since' => 'annotation',
                    'throws' => 'annotation',
                    'todo' => 'annotation',
                    'uses' => 'annotation',
                    'var' => 'annotation',
                    'version' => 'annotation',
                ])
                ->setNormalizer(static function (Options $options, $value): array {
                    $normalized = [];

                    foreach ($value as $tag => $type) {
                        $normalized[strtolower($tag)] = $type;
                    }

                    return $normalized;
                })
                ->getOption(),
        ]);
    }

    /**
     * @param list<string> $parts
     */
    private function tagIsSurroundedByText(array $parts, int $index): bool
    {
        return
            Preg::match('/(^|\R)\h*[^@\s]\N*/', $this->cleanComment($parts[$index - 1]))
            || Preg::match('/^.*?\R\s*[^@\s]/', $this->cleanComment($parts[$index + 1]));
    }

    private function cleanComment(string $comment): string
    {
        $comment = Preg::replace('/^\/\*\*|\*\/$/', '', $comment);

        return Preg::replace('/(\R)(\h*\*)?\h*/', '$1', $comment);
    }
}
