// Token 工具函数
export const TOKEN_KEY = 'auth_token';

export function getToken(): string | null {
  return localStorage.getItem(TOKEN_KEY);
}

export function setToken(token: string): void {
  localStorage.setItem(TOKEN_KEY, token);
}

export function removeToken(): void {
  localStorage.removeItem(TOKEN_KEY);
}

export function getUsernameFromToken(token?: string): string {
  try {
    const t = token || getToken();
    if (!t) return '';
    const payload = JSON.parse(atob(t.split('.')[1]));
    return payload.username || payload.sub || '';
  } catch {
    return '';
  }
}

export function getClientIdFromToken(token?: string): string {
  try {
    const t = token || getToken();
    if (!t) return '';
    const payload = JSON.parse(atob(t.split('.')[1]));
    return payload.clientId || '';
  } catch {
    return '';
  }
}