<?php
require_once __DIR__ . '/db/config.php';

header('Content-Type: application/json');

$response = [
    'status' => 'healthy',
    'timestamp' => date('c'),
    'php_version' => PHP_VERSION,
    'database' => 'disconnected',
    'monitor_engine' => 'offline'
];

try {
    if (db()) {
        $response['database'] = 'connected';
    }
} catch (Exception $e) {
    $response['database'] = 'error: ' . $e->getMessage();
}

$lockFile = __DIR__ . '/monitor.lock';
if (file_exists($lockFile)) {
    $fp = fopen($lockFile, 'r');
    if (!flock($fp, LOCK_EX | LOCK_NB)) {
        $response['monitor_engine'] = 'running';
    }
    fclose($fp);
}

if ($response['status'] === 'healthy' && $response['database'] === 'connected' && $response['monitor_engine'] === 'running') {
    http_response_code(200);
} else {
    // We don't necessarily want 500 if monitor is just offline
    http_response_code(200);
}

echo json_encode($response);