<?php

declare(strict_types=1);

namespace App\Tests\Controller\Api;

use App\Controller\Api\LastUpdateController;
use League\Flysystem\FilesystemOperator;
use PHPUnit\Framework\TestCase;
use Symfony\Component\DependencyInjection\Container;

class LastUpdateControllerTest extends TestCase
{
    public function testReturnsTheMarkerTimestamp(): void
    {
        self::assertSame('2026-09-22 11:10:15', $this->timestampFor(
            "22.09.2026 11:10:15\r\nLetzte \xDCbertragung\r\nAnzahl \xDCbertragene Dateien: 177\r\nVollexport\r\n"
        ));
    }

    public function testAMissingMarkerIsNullRatherThanAServerError(): void
    {
        self::assertNull($this->timestampFor(null));
    }

    public function testAnEmptyMarkerIsNull(): void
    {
        self::assertNull($this->timestampFor(''));
    }

    public function testAnUnparseableMarkerIsNull(): void
    {
        self::assertNull($this->timestampFor("gestern\r\nLetzte \xDCbertragung\r\nAnzahl \xDCbertragene Dateien: 177\r\n"));
    }

    private function timestampFor(?string $marker): ?string
    {
        $storage = $this->createStub(FilesystemOperator::class);
        $storage->method('fileExists')->willReturn(null !== $marker);
        $storage->method('read')->willReturn((string) $marker);

        $controller = new LastUpdateController($storage);
        $controller->setContainer(new Container());

        $body = json_decode((string) $controller->index()->getContent(), true);
        self::assertArrayHasKey('timestamp', $body);

        return $body['timestamp'];
    }
}