<?php

namespace App\Http\Controllers\Api\Legacy;

use Illuminate\Http\JsonResponse;
use Illuminate\Validation\ValidationException;

/**
 * Response-Konventionen der Alt-API (Symfony, tnHttpError-Templates):
 * Erfolg beim Anlegen = 201 + Location-Header + Body {};
 * Fehler = {"global_errors":[…]} bzw. 422 zusätzlich mit "field_errors".
 * Vertrag dokumentiert in dev/betrieb/api-legacy-paritaet.md §1.
 */
trait RespondsLikeLegacyApi
{
    protected function legacyCreated(string $locationUrl): JsonResponse
    {
        return response()->json((object) [], 201)->header('Location', $locationUrl);
    }

    protected function legacyError(int $status, array $globalErrors): JsonResponse
    {
        return response()->json(['global_errors' => $globalErrors], $status);
    }

    protected function legacyValidationError(ValidationException $exception): JsonResponse
    {
        return response()->json([
            'global_errors' => [],
            'field_errors' => $exception->errors(),
        ], 422);
    }

    /**
     * Legacy-Land (country.id der Altportale) → ISO-Code des neuen Systems.
     * Häufigste IDs aus dem Prod-Snapshot; unbekannte → null (Feld leer).
     */
    protected function legacyCountryCode(mixed $legacyCountryId): ?string
    {
        return match ((int) $legacyCountryId) {
            177 => 'DE',
            80 => 'AT',
            196 => 'CH',
            229 => 'US',
            30 => 'GB',
            165 => 'FR',
            78 => 'IT',
            2 => 'NL',
            47 => 'ES',
            108 => 'CY',
            115 => 'LI',
            117 => 'LU',
            15 => 'AU',
            89 => 'CA',
            default => null,
        };
    }
}