<?php
header('Content-Type: application/json');
header('Access-Control-Allow-Origin: *');
$dir = '/tmp/wevia-tasks';
if (!is_dir($dir)) mkdir($dir, 0777, true);

if (isset($_GET['poll'])) {
    $id = preg_replace('/[^a-z0-9_-]/', '', $_GET['poll']);
    $out = "$dir/$id.out";
    $flag = "$dir/$id.flag";
    if (file_exists($flag)) {
        $content = trim(file_get_contents($out));
        echo json_encode(['status'=>'done','task_id'=>$id,'content'=>$content]);
    } else {
        echo json_encode(['status'=>'running','task_id'=>$id]);
    }
    exit;
}

$jin = json_decode(file_get_contents('php://input'), true);
$cmd = $jin['cmd'] ?? '';
$tool = $jin['tool'] ?? 'async';
if (!$cmd) { echo json_encode(['error'=>'no cmd']); exit; }

$id = 'task_' . bin2hex(random_bytes(5));
$out = "$dir/$id.out";
$flag = "$dir/$id.flag";

$escaped = escapeshellarg($cmd);
exec("nohup bash -c 'timeout 120 bash -c $escaped > $out 2>&1; touch $flag' > /dev/null 2>&1 &");

echo json_encode(['status'=>'launched','task_id'=>$id,'tool'=>$tool]);