<?php
require __DIR__ . '/../lib/app.php';
auth_require();

header('Content-Type: application/json; charset=utf-8');

$raw = file_get_contents('php://input');
$in  = json_decode((string)$raw, true);
if (!is_array($in)) {
  echo json_encode(['ok' => false, 'error' => 'bad json']);
  exit;
}

$cap_gb        = max(0, (int)($in['cap_gb'] ?? 0));
$cap_reset_day = min(28, max(1, (int)($in['cap_reset_day'] ?? 1)));
$rate_mbps     = max(0, (int)($in['rate_mbps'] ?? 0));

$cfg = app_load_config();
$cfg['cap_gb']        = $cap_gb;
$cfg['cap_reset_day'] = $cap_reset_day;
$cfg['rate_mbps']     = $rate_mbps;

if (!app_save_config($cfg)) {
  echo json_encode(['ok' => false, 'error' => 'save failed']);
  exit;
}

echo json_encode(['ok' => true]);