<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use Illuminate\Support\Facades\App;
use Illuminate\Support\Facades\Session;

class LocaleController extends Controller
{
    public function set(Request $request)
    {
        $locale = $request->input('locale');
        $supportedLocales = array_values(array_unique(array_filter([
            config('app.locale'),
            config('app.fallback_locale'),
            ...array_filter(array_map(
                static fn ($value) => trim((string) $value),
                explode(',', (string) env('APP_SUPPORTED_LOCALES', ''))
            )),
        ])));

        if (empty($supportedLocales)) {
            $supportedLocales = ['de', 'en'];
        }

        if (in_array($locale, $supportedLocales)) {
            App::setLocale($locale);
            Session::put('locale', $locale);
            Session::put('preferred_locale', $locale);
        }

        if ($request->expectsJson()) {
            return response()->json([
                'locale' => App::getLocale(),
            ]);
        }

        return back();
    }
}