/* ============================================================
   ARCHIVO 3: auth.php
   Redirige al usuario a QuickBooks para autorizar
   ============================================================ */

require_once 'config.php';

$dataService = DataService::Configure([
    'auth_mode'    => 'oauth2',
    'ClientID'     => QBO_CLIENT_ID,
    'ClientSecret' => QBO_CLIENT_SECRET,
    'RedirectURI'  => QBO_REDIRECT_URI,
    'scope'        => QBO_SCOPE,
    'baseUrl'      => QBO_BASE_URL,
]);

$OAuth2LoginHelper = $dataService->getOAuth2LoginHelper();
$authUrl = $OAuth2LoginHelper->getAuthorizationCodeURL();

// Guardar state para validación CSRF
$_SESSION['oauth_state'] = $OAuth2LoginHelper->getState();

header('Location: ' . $authUrl);
exit;