<?php declare(strict_types=1);

namespace AeonDumpManager\Tests\Service;

use AeonDumpManager\Service\DumpFilenameParser;
use PHPUnit\Framework\TestCase;

class DumpFilenameParserTest extends TestCase
{
    private DumpFilenameParser $parser;

    protected function setUp(): void
    {
        $this->parser = new DumpFilenameParser();
    }

    public function testFormatProducesExpectedPattern(): void
    {
        $dateTime = new \DateTimeImmutable('2026-09-14 15:04:05');

        self::assertSame('dump_2026-09-14_15-04-05.sql.gz', $this->parser->format($dateTime));
    }

    public function testParseRoundTripsWithFormat(): void
    {
        $dateTime = new \DateTimeImmutable('2026-09-14 15:04:05');
        $filename = $this->parser->format($dateTime);

        self::assertEquals($dateTime, $this->parser->parse($filename));
    }

    /**
     * @dataProvider invalidFilenameProvider
     */
    public function testParseRejectsInvalidFilenames(string $filename): void
    {
        self::assertNull($this->parser->parse($filename));
    }

    public static function invalidFilenameProvider(): iterable
    {
        yield 'wrong extension' => ['dump_2026-09-14_15-04-05.sql'];
        yield 'no prefix' => ['2026-09-14_15-04-05.sql.gz'];
        yield 'path traversal' => ['../dump_2026-09-14_15-04-05.sql.gz'];
        yield 'garbage' => ['not-a-dump.sql.gz'];
        yield 'empty' => [''];
    }

    public function testIsValid(): void
    {
        self::assertTrue($this->parser->isValid('dump_2026-09-14_15-04-05.sql.gz'));
        self::assertFalse($this->parser->isValid('../etc/passwd'));
    }
}