<?php
declare(strict_types=1);

use App\Avatar\Lorelei;

$seed = Lorelei::normalizeSeed((string)($_GET['seed'] ?? 'papa-kind-treff'));
$cacheDir = dirname(__DIR__, 3) . '/assets/avatars/dicebear-cache';

if (!is_dir($cacheDir)) {
    @mkdir($cacheDir, 0775, true);
}

$cacheFile = $cacheDir . '/' . $seed . '.svg';
$svg = is_file($cacheFile) ? file_get_contents($cacheFile) : false;

if ($svg === false) {
    $url = 'https://api.dicebear.com/10.x/lorelei/svg?seed=' . rawurlencode($seed) . '&size=256';
    $context = stream_context_create([
        'http' => [
            'method' => 'GET',
            'timeout' => 6,
            'header' => "User-Agent: Papa-Kind-Treff/1.0\r\nAccept: image/svg+xml\r\n",
        ],
    ]);

    $remote = @file_get_contents($url, false, $context);
    if (is_string($remote) && str_contains($remote, '<svg')) {
        $svg = $remote;
        @file_put_contents($cacheFile, $svg);
    }
}

if (!is_string($svg) || $svg === '') {
    $svg = Lorelei::fallbackSvg($seed, 'Avatar');
}

header('Content-Type: image/svg+xml; charset=utf-8');
header('Cache-Control: public, max-age=604800, immutable');
echo $svg;