const Auth = (() => {
  const KEY_TOKEN = 'ev_token';
  const KEY_ROLE  = 'ev_role';
  const KEY_NAME  = 'ev_name';
  const KEY_ID    = 'ev_uid';

  function save(token, role, name, id) {
    localStorage.setItem(KEY_TOKEN, token);
    localStorage.setItem(KEY_ROLE,  role);
    localStorage.setItem(KEY_NAME,  name);
    localStorage.setItem(KEY_ID,    id);
  }
  function token() { return localStorage.getItem(KEY_TOKEN); }
  function role()  { return localStorage.getItem(KEY_ROLE);  }
  function name()  { return localStorage.getItem(KEY_NAME);  }
  function uid()   { return localStorage.getItem(KEY_ID);    }

  function logout() {
    [KEY_TOKEN, KEY_ROLE, KEY_NAME, KEY_ID].forEach(k => localStorage.removeItem(k));
    location.href = '/pages/login.html';
  }

  function require(allowedRoles) {
    if (!token()) { logout(); return false; }
    if (allowedRoles && !allowedRoles.includes(role())) {
      alert('접근 권한이 없습니다.');
      history.back();
      return false;
    }
    return true;
  }

  function renderNav(el) {
    if (!el) return;
    el.innerHTML = `
      <span class="nav-user">
        <span>${name()} <small style="color:var(--accent)">[${role()}]</small></span>
        <a onclick="Auth.logout()">로그아웃</a>
      </span>`;
  }

  function statusBadge(status) {
    const map = {
      pending_approval: '승인대기', pending: '접수', in_progress: '처리중',
      done: '완료', waiting: '부품대기', revisit: '재방문',
      registered: '등록', reviewing: '검토중', developing: '개발중',
      deployed: '배포완료',
    };
    return `<span class="badge s-${status}">${map[status] || status}</span>`;
  }

  function costStatusBadge(s) {
    const map = { pending:'미처리', billed:'청구완료', waived:'면제', settled:'정산완료' };
    return `<span class="badge s-cost-${s}">${map[s] || s}</span>`;
  }

  function fmtDt(dt) {
    if (!dt) return '-';
    return new Date(dt).toLocaleString('ko-KR', {year:'numeric',month:'2-digit',day:'2-digit',hour:'2-digit',minute:'2-digit'});
  }

  return { save, token, role, name, uid, logout, require, renderNav, statusBadge, costStatusBadge, fmtDt };
})();