<?php

declare(strict_types=1);

namespace App\Tests\Migrations;

use PHPUnit\Framework\TestCase;
use Symfony\Component\Yaml\Yaml;

/**
 * Version20260820000000 rewrites the wording of mails that go out to every teamer, and it
 * runs exactly once with nobody watching, so the patterns it does that with are pinned
 * here. The migration is not autoloaded (only src/ and tests/ are), hence the require.
 */
class EmphasisRewriteTest extends TestCase
{
    private string $single;
    private string $double;

    protected function setUp(): void
    {
        require_once __DIR__.'/../../migrations/Version20260820000000.php';

        $reflection = new \ReflectionClass(\DoctrineMigrations\Version20260820000000::class);

        $this->single = $reflection->getConstant('SINGLE_EMPHASIS');
        $this->double = $reflection->getConstant('DOUBLE_EMPHASIS');
    }

    /**
     * @dataProvider upCases
     */
    public function testTheUpwardRewrite(string $before, string $after): void
    {
        $this->assertSame($after, preg_replace($this->single, '**$1**', $before));
    }

    /**
     * @return iterable<string, array{string, string}>
     */
    public static function upCases(): iterable
    {
        yield 'one word' => ['Das ist *wichtig*', 'Das ist **wichtig**'];
        yield 'several words' => ['*Dein Einsatz wurde angenommen!*', '**Dein Einsatz wurde angenommen!**'];
        yield 'around a placeholder' => ['*{destination}*', '**{destination}**'];
        yield 'already bold' => ['Das ist **wichtig**', 'Das ist **wichtig**'];
        yield 'escaped asterisk' => ['Ein Sternchen: \*', 'Ein Sternchen: \*'];
        // Whitespace next to a marker means it is not emphasis - CommonMark's own rule, and
        // the reason arithmetic and stray asterisks come through untouched.
        yield 'multiplication' => ['5 * 3 = 15', '5 * 3 = 15'];
        yield 'spaced asterisks' => ['a * b * c', 'a * b * c'];
        yield 'bullet at line start' => ["* Ausweis\n* Bankverbindung", "* Ausweis\n* Bankverbindung"];
        yield 'not across lines' => ["*offen\ngeblieben*", "*offen\ngeblieben*"];
    }

    public function testTheRewriteIsReversible(): void
    {
        $before = 'Das ist *wichtig* und *{destination}* auch';

        $up = preg_replace($this->single, '**$1**', $before);

        $this->assertSame($before, preg_replace($this->double, '*$1*', $up));
    }

    /**
     * The delivered defaults were rewritten by hand in the same commit, so nothing should
     * be left in them for the migration to find. Read through the parser rather than off
     * the raw file: the header comment documents *kursiv* on purpose.
     */
    public function testTheDeliveredDefaultsAreAlreadyMigrated(): void
    {
        $texts = Yaml::parseFile(__DIR__.'/../../config/email_texts.yaml')['texts'];

        foreach ($texts as $key => $text) {
            $body = (string) ($text['body'] ?? '');

            $this->assertSame(
                $body,
                preg_replace($this->single, '**$1**', $body),
                sprintf('Default wording of "%s" still carries single-asterisk emphasis', $key)
            );
        }
    }
}