<?php

declare(strict_types=1);

namespace DoctrineMigrations;

use Doctrine\DBAL\Schema\Schema;
use Doctrine\Migrations\AbstractMigration;

/**
 * Moves destination.country from the raw BusProNet abbreviations to lowercase ISO-2.
 *
 * The column used to hold whatever BusProNet reported as hotel/land, lowercased: a,
 * ch, d, f, i, nl. That set is not a standard - the same country appears as A, AT and
 * AUT upstream - so the import now stores the ISO code MyE&P resolves instead, and the
 * existing rows are converted to match. The flag icons and the country filters use the
 * same vocabulary and are switched with it.
 */
final class Version20260927090000 extends AbstractMigration
{
    private const TO_ISO = [
        'a' => 'at',
        'd' => 'de',
        'f' => 'fr',
        'i' => 'it',
    ];

    public function getDescription(): string
    {
        return 'Convert destination.country to lowercase ISO-3166-1 alpha-2';
    }

    public function up(Schema $schema): void
    {
        foreach (self::TO_ISO as $legacy => $iso) {
            $this->addSql('UPDATE destination SET country = ? WHERE country = ?', [$iso, $legacy]);
        }

        // ch and nl are already ISO; empty strings were never a country
        $this->addSql("UPDATE destination SET country = NULL WHERE country = ''");
    }

    public function down(Schema $schema): void
    {
        foreach (self::TO_ISO as $legacy => $iso) {
            $this->addSql('UPDATE destination SET country = ? WHERE country = ?', [$legacy, $iso]);
        }
    }
}