<?php

namespace App\Http\Middleware;

use Closure;
use Illuminate\Http\Request;
use Symfony\Component\HttpFoundation\Response;

class SetLocale
{
    /**
     * Handle an incoming request.
     *
     * @param  \Closure(\Illuminate\Http\Request): (\Symfony\Component\HttpFoundation\Response)  $next
     */
    public function handle(Request $request, Closure $next): Response
    {
        $locale = null;

        if ($request->has('locale')) {
            $locale = $request->get('locale');
            session(['locale' => $locale]);
        } elseif (session()->has('locale')) {
            $locale = session('locale');
        } elseif (auth()->check() && auth()->user()->locale) {
            $locale = auth()->user()->locale;
        } else {
            $headerLocale = substr($request->server('HTTP_ACCEPT_LANGUAGE'), 0, 2);
            if (in_array($headerLocale, ['de'])) {
                $locale = $headerLocale;
            }
        }

        app()->setLocale($locale ?: 'en');

        return $next($request);
    }
}