<?php
require __DIR__ . '/../db.php';

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

$input = json_decode(file_get_contents('php://input'), true);
if (!$input || !isset($input['uid'], $input['cmd'])) {
    http_response_code(400);
    echo json_encode(['ok' => false, 'err' => 'invalid_input']);
    exit;
}

$uid = $input['uid'];
$cmd = $input['cmd'];
$params = isset($input['params']) ? json_encode($input['params']) : '{}';

// Confirmar se o device existe
$stmt = $pdo->prepare("SELECT id FROM devices WHERE uid=? LIMIT 1");
$stmt->execute([$uid]);
$dev = $stmt->fetchColumn();
if (!$dev) {
    http_response_code(404);
    echo json_encode(['ok' => false, 'err' => 'device_not_found']);
    exit;
}

// Inserir comando
$stmt = $pdo->prepare("
    INSERT INTO commands (device_id, cmd, params, status, queued_at)
    VALUES (?, ?, ?, 'pending', NOW())
");
$stmt->execute([$dev, $cmd, $params]);

$id = $pdo->lastInsertId();

echo json_encode(['ok' => true, 'id' => (int)$id], JSON_UNESCAPED_SLASHES);