<?php

declare(strict_types=1);

namespace LIT\MCP\Tests\Unit\Guides;

use LIT\MCP\Guides\GuideRepository;
use LIT\MCP\Tests\Unit\TestCase;

final class GuideRepositoryTest extends TestCase
{
    private GuideRepository $guides;

    protected function setUp(): void
    {
        parent::setUp();
        $this->guides = new GuideRepository(dirname(__DIR__, 2) . '/Fixtures/guides');
    }

    public function testListsTopicsSortedWithoutExtension(): void
    {
        self::assertSame(['divi-shortform', 'overview'], $this->guides->topics());
    }

    public function testReturnsMarkdownOfKnownTopic(): void
    {
        self::assertStringContainsString('Testinhalt Kurzform', (string) $this->guides->get('divi-shortform'));
    }

    /**
     * @dataProvider maliciousTopics
     */
    public function testRejectsAnythingThatIsNotAPlainTopicName(string $topic): void
    {
        self::assertNull($this->guides->get($topic));
    }

    /** @return array<string, array{string}> */
    public static function maliciousTopics(): array
    {
        return [
            'traversal' => ['../../wp-config'],
            'with extension' => ['overview.md'],
            'empty' => [''],
            'absolute' => ['/etc/passwd'],
            'unknown' => ['does-not-exist'],
            'uppercase' => ['OVERVIEW'],
        ];
    }

    public function testMissingDirectoryYieldsNoTopics(): void
    {
        self::assertSame([], (new GuideRepository('/nonexistent/dir'))->topics());
    }
}