<?php
/**
 * Status API pro MicalLab
 * Kontroluje dostupnost služeb a vrací JSON
 */

header('Content-Type: application/json');
header('Access-Control-Allow-Origin: *');

// Konfigurace služeb
$services = [
    ['id' => 'gitea', 'name' => 'Gitea', 'url' => 'https://gitea.micalis.net/', 'timeout' => 5],
    ['id' => 'nextcloud', 'name' => 'Nextcloud', 'url' => 'https://nextcloud.micalis.net/', 'timeout' => 5],
    ['id' => 'aichat', 'name' => 'AI Chat', 'url' => 'https://ai.micalis.net/', 'timeout' => 5],
    ['id' => 'jellyfin', 'name' => 'Jellyfin', 'url' => 'https://jellyfin.micalis.net/', 'timeout' => 5],
    ['id' => 'amp', 'name' => 'AMP Game Panel', 'url' => 'https://amp.micalis.net/', 'timeout' => 5],
    ['id' => 'matrix', 'name' => 'Matrix', 'url' => 'https://matrix.micalis.net/', 'timeout' => 5],
    ['id' => 'grafana', 'name' => 'Grafana', 'url' => 'https://grafana.micalis.net/', 'timeout' => 5],
];

$cacheFile = __DIR__ . '/status_cache.json';
$cacheTTL = 60;

// Zkus načíst z cache
if (file_exists($cacheFile)) {
    $cache = json_decode(file_get_contents($cacheFile), true);
    if ($cache && isset($cache['timestamp']) && (time() - $cache['timestamp']) < $cacheTTL) {
        echo json_encode($cache['data']);
        exit;
    }
}

// Funkce pro kontrolu služby
function checkService($url, $timeout = 5) {
    $ch = curl_init();
    curl_setopt_array($ch, [
        CURLOPT_URL => $url,
        CURLOPT_RETURNTRANSFER => true,
        CURLOPT_HEADER => true,
        CURLOPT_NOBODY => true,
        CURLOPT_TIMEOUT => $timeout,
        CURLOPT_SSL_VERIFYPEER => true,
        CURLOPT_FOLLOWLOCATION => true,
        CURLOPT_MAXREDIRS => 3,
    ]);
    
    curl_exec($ch);
    $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
    $error = curl_error($ch);
    curl_close($ch);
    
    // Timeout
    if ($error && stripos($error, 'timeout') !== false) {
        return ['status' => 'offline', 'message' => 'Timeout'];
    }
    // Connection error
    if ($error || $httpCode === 0) {
        return ['status' => 'offline', 'message' => 'Connection failed'];
    }
    // HTTP error (4xx, 5xx)
    if ($httpCode >= 400) {
        return ['status' => 'offline', 'message' => "HTTP $httpCode"];
    }
    
    return ['status' => 'online', 'http_code' => $httpCode, 'message' => 'OK'];
}

// Zkontroluj všechny služby
$results = [];
foreach ($services as $service) {
    $check = checkService($service['url'], $service['timeout']);
    $results[] = [
        'id' => $service['id'],
        'name' => $service['name'],
        'status' => $check['status'],
        'message' => $check['message'],
    ];
}

$onlineCount = count(array_filter($results, fn($r) => $r['status'] === 'online'));

$response = [
    'timestamp' => time(),
    'overall' => [
        'status' => $onlineCount === count($results) ? 'all_online' : ($onlineCount > 0 ? 'partial' : 'all_offline'),
        'online' => $onlineCount,
        'total' => count($results),
    ],
    'services' => $results,
];

file_put_contents($cacheFile, json_encode(['timestamp' => time(), 'data' => $response]));

echo json_encode($response);