<?php
header('Content-Type: application/json');
$checks = [];

// 1. S151 Ollama alive?
$ch = curl_init('http://151.80.235.110:11434/api/ps');
curl_setopt_array($ch, [CURLOPT_RETURNTRANSFER=>true, CURLOPT_TIMEOUT=>3, CURLOPT_CONNECTTIMEOUT=>2]);
$r = curl_exec($ch); $code = curl_getinfo($ch, CURLINFO_HTTP_CODE); curl_close($ch);
$s151 = $code == 200;
$models = $r ? array_column(json_decode($r, true)['models'] ?? [], 'name') : [];
$checks['s151'] = $s151 ? 'ok' : 'down';
$checks['models'] = $models;

// 2. fast.php exists?
$checks['fast_php'] = file_exists('/var/www/html/api/weval-ia-fast.php') ? 'ok' : 'missing';

// 3. PHP-FPM workers
$workers = (int)shell_exec('pgrep -c php-fpm8.5 2>/dev/null');
$checks['workers'] = $workers;

// Overall status
$ok = $s151 && $checks['fast_php'] === 'ok' && $workers > 2;
$checks['status'] = $ok ? 'ok' : 'degraded';

echo json_encode($checks);