<?php
require_once __DIR__ . '/../helpers.php';
runAuth();

/**
 * Check for order status changes (polling endpoint)
 * POST: { OrderID: int, LastKnownStatusID: int }
 */

$payload = ['OK' => false, 'ERROR' => '', 'HAS_UPDATE' => false, 'ORDER_STATUS' => new stdClass(), 'MESSAGE' => ''];

try {
    $data = readJsonBody();

    if (!isset($data['OrderID'])) {
        $payload['ERROR'] = 'OrderID is required';
        jsonResponse($payload);
    }
    if (!isset($data['LastKnownStatusID'])) {
        $payload['ERROR'] = 'LastKnownStatusID is required';
        jsonResponse($payload);
    }

    $OrderID = (int) $data['OrderID'];
    $LastKnownStatusID = (int) $data['LastKnownStatusID'];

    $qOrder = queryOne("
        SELECT ID, StatusID, LastEditedOn, ServicePointID, BusinessID, UserID
        FROM Orders
        WHERE ID = ? AND StatusID != 7
    ", [$OrderID]);

    if (!$qOrder) {
        $payload['ERROR'] = 'Order not found or deleted';
        jsonResponse($payload);
    }

    $currentStatus = (int) $qOrder['StatusID'];
    $hasUpdate = ($currentStatus !== $LastKnownStatusID);

    $payload['OK'] = true;
    $payload['HAS_UPDATE'] = $hasUpdate;

    if ($hasUpdate) {
        $statusMap = [
            0 => ['Cart', 'Your order is in the cart'],
            1 => ['Submitted', 'Your order has been received and is being prepared'],
            2 => ['Preparing', 'Your order is now being prepared'],
            3 => ['Ready', 'Your order is ready for pickup!'],
            4 => ['Completed', 'Thank you! Your order is complete'],
        ];

        $info = $statusMap[$currentStatus] ?? ['Unknown', 'Order status updated'];

        $payload['ORDER_STATUS'] = [
            'OrderID'      => (int) $qOrder['ID'],
            'StatusID'     => $currentStatus,
            'StatusName'   => $info[0],
            'Message'      => $info[1],
            'LastEditedOn' => toISO8601($qOrder['LastEditedOn']),
        ];
        $payload['MESSAGE'] = $info[1];
    } else {
        $payload['MESSAGE'] = 'No status update';
    }

} catch (Exception $e) {
    $payload['ERROR'] = 'Error checking status: ' . $e->getMessage();
    $payload['OK'] = false;
}

jsonResponse($payload);