<?php
declare(strict_types=1);

header('Content-Type: application/json; charset=utf-8');
header('X-Content-Type-Options: nosniff');
header('Referrer-Policy: no-referrer');

$apiUrl = 'https://git.dominicspringer.de/api/v1/repos/Emporex/Void-Bastion-Releases/releases';
$response = false;

if (function_exists('curl_init')) {
    $curl = curl_init($apiUrl);
    curl_setopt_array($curl, [
        CURLOPT_RETURNTRANSFER => true,
        CURLOPT_FOLLOWLOCATION => true,
        CURLOPT_CONNECTTIMEOUT => 4,
        CURLOPT_TIMEOUT => 8,
        CURLOPT_USERAGENT => 'GerGames-Void-Bastion-Website/1.0',
        CURLOPT_HTTPHEADER => ['Accept: application/json'],
    ]);
    $body = curl_exec($curl);
    $status = (int) curl_getinfo($curl, CURLINFO_RESPONSE_CODE);
    curl_close($curl);
    if (is_string($body) && $status >= 200 && $status < 300) {
        $response = $body;
    }
} else {
    $context = stream_context_create(['http' => [
        'method' => 'GET',
        'timeout' => 8,
        'ignore_errors' => true,
        'header' => "Accept: application/json\r\nUser-Agent: GerGames-Void-Bastion-Website/1.0\r\n",
    ]]);
    $body = @file_get_contents($apiUrl, false, $context);
    if (is_string($body)) {
        $response = $body;
    }
}

$releases = is_string($response) ? json_decode($response, true) : null;
if (!is_array($releases)) {
    http_response_code(503);
    header('Cache-Control: no-store');
    echo json_encode(['error' => 'Release-Information vorübergehend nicht verfügbar.']);
    exit;
}

foreach ($releases as $release) {
    if (!is_array($release) || !empty($release['draft'])) {
        continue;
    }
    foreach (($release['assets'] ?? []) as $asset) {
        if (!is_array($asset) || strtolower((string) ($asset['name'] ?? '')) !== 'void-bastion-setup-x64.exe') {
            continue;
        }
        $downloadUrl = (string) ($asset['browser_download_url'] ?? '');
        $parts = parse_url($downloadUrl);
        if (($parts['scheme'] ?? '') !== 'https' || strtolower((string) ($parts['host'] ?? '')) !== 'git.dominicspringer.de') {
            continue;
        }

        header('Cache-Control: public, max-age=300, stale-while-revalidate=600');
        echo json_encode([
            'version' => ltrim((string) ($release['tag_name'] ?? ''), 'v'),
            'windows_url' => $downloadUrl,
            'release_url' => 'https://git.dominicspringer.de/Emporex/Void-Bastion-Releases/releases/tag/' . rawurlencode((string) ($release['tag_name'] ?? '')),
            'windows_size_mib' => (string) max(1, (int) round(((int) ($asset['size'] ?? 0)) / 1048576)),
        ], JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE);
        exit;
    }
}

http_response_code(404);
header('Cache-Control: no-store');
echo json_encode(['error' => 'Es wurde noch kein Windows-Setup veröffentlicht.']);