const TOKEN_KEY = 'token';

export function getToken() {
  return localStorage.getItem(TOKEN_KEY);
}

export function setToken(t) {
  t ? localStorage.setItem(TOKEN_KEY, t) : localStorage.removeItem(TOKEN_KEY);
}

/** 登录态变更通知：登录/退出/头像更新后触发，Layout 监听后重新拉取当前用户 */
export function notifyAuthChange() {
  window.dispatchEvent(new Event('authchange'));
}

export async function request(path, { method = 'GET', body, auth = true } = {}) {
  const headers = { 'Content-Type': 'application/json' };
  if (auth && getToken()) headers.Authorization = 'Bearer ' + getToken();
  const res = await fetch('/api' + path, { method, headers, body: body ? JSON.stringify(body) : undefined });
  const data = await res.json().catch(() => ({}));
  if (!res.ok) { const err = new Error(data.error || '请求失败'); err.status = res.status; throw err; }
  return data;
}