<?php
/**
 * alert_low_stock.php — Called by Node.js scheduler daily at 8am.
 * Returns companies that have one or more SKUs below their min_stock threshold.
 * Response: { success: 1, alerts: [{ company_id, count }] }
 */
require __DIR__ . '/../assets/utils/cron_auth.php';

$sth = $pdo1->query(
    "SELECT e.company_id, COUNT(*) AS count
     FROM etl_stock_summary e
     JOIN md_product p
       ON p.product_sku = e.product_sku
      AND p.company_id  = e.company_id
      AND p.status      = 1
     WHERE e.company_id > 0
       AND p.min_stock  > 0
       AND (e.total_in - e.total_out) < p.min_stock
     GROUP BY e.company_id
     HAVING count > 0"
);

$answer['success'] = 1;
$answer['alerts']  = $sth->fetchAll(PDO::FETCH_ASSOC);

exit(json_encode($answer));