import { oauthManager } from '#server/service/oauth/oauth-manager';
import { setSessionCookie } from '#server/service/auth/cookie';
import { OAuthError } from '#server/service/oauth/oauth-error';

export default defineWrappedResponseHandler(async (event) => {
  const providerName = getRouterParam(event, 'provider');
  const query = getQuery(event);

  const { code, state } = query as { code?: string; state?: string };

  if (!code || !state) {
    return sendRedirect(event, '/auth/login?oauth_error=missing_params');
  }

  try {
    const result = await oauthManager.handleCallback(providerName!, code, state);

    if (result.sessionId) {
      setSessionCookie(event, result.sessionId);
    }

    return sendRedirect(event, '/auth/login?oauth_success=1');
  } catch (error) {
    const errorCode = error instanceof OAuthError ? error.code : 'OAUTH_UNKNOWN';
    return sendRedirect(event, `/auth/login?oauth_error=${errorCode}`);
  }
});