(function () {
  'use strict';

  let members = new Map();
  let loading = false;
  let scheduled = false;

  function token() {
    const match = document.cookie.match(/(?:^|;\s*)accessToken=([^;]+)/);
    return match ? decodeURIComponent(match[1]) : '';
  }

  function currentId() {
    try {
      return JSON.parse(atob(token().split('.')[1].replace(/-/g, '+').replace(/_/g, '/'))).sub;
    } catch (_) {
      return '';
    }
  }

  function allowed() {
    return currentId() === 'master' || currentId() === 'chals';
  }

  async function api(path, method) {
    const response = await fetch(path, {
      method: method || 'GET',
      headers: {Authorization: 'Bearer ' + token()},
      credentials: 'same-origin'
    });
    if (!response.ok) {
      let detail = '';
      try {
        const error = await response.json();
        detail = error.detail || error.message || '';
      } catch (_) {}
      throw new Error(detail || (response.status === 403 ? '관리 권한이 없거나 보호된 계정입니다. 다시 로그인해 주세요.' : '요청에 실패했습니다.'));
    }
    return response.status === 204 ? null : response.json().catch(function () { return null; });
  }

  async function loadMembers() {
    if (loading || !allowed()) return;
    loading = true;
    try {
      const list = await api('/api/member/list');
      members = new Map(list.map(function (member) { return [member.memId, member]; }));
      schedule();
    } catch (error) {
      console.error('회원 관리 목록을 가져오지 못했습니다.', error);
    } finally {
      loading = false;
    }
  }

  function decorate() {
    if (location.pathname !== '/joinId') return;
    const title = Array.from(document.querySelectorAll('h6')).find(function (node) {
      return node.textContent.trim() === '회원 목록';
    });
    const table = title && title.parentElement.querySelector('table');
    if (!table) return;
    const head = table.querySelector('thead tr');
    const rows = table.querySelectorAll('tbody tr');
    if (!head) return;

    const nativeReset = Array.from(head.children).find(function (cell) {
      return cell.textContent.trim() === '초기화';
    });
    if (nativeReset) {
      const index = Array.from(head.children).indexOf(nativeReset);
      nativeReset.style.display = 'none';
      rows.forEach(function (row) {
        if (row.children[index]) row.children[index].style.display = 'none';
      });
    }

    if (!allowed()) return;

    if (!head.querySelector('[data-doffice-admin-head]')) {
      const cell = document.createElement('th');
      cell.textContent = '관리';
      cell.setAttribute('data-doffice-admin-head', '');
      cell.className = 'doffice-admin-head';
      head.appendChild(cell);
    }
    rows.forEach(function (row) {
      if (row.querySelector('[data-doffice-admin-actions]')) return;
      const id = row.children[1] && row.children[1].textContent.trim();
      if (!id || !members.has(id)) return;
      const cell = document.createElement('td');
      cell.className = 'doffice-admin-actions';
      cell.setAttribute('data-doffice-admin-actions', '');
      cell.innerHTML = '<button type="button" data-doffice-action="reset">비밀번호 초기화</button>'
        + '<button type="button" data-doffice-action="delete">삭제</button>';
      if (id === 'master' || id === 'chals') {
        cell.querySelectorAll('button').forEach(function (button) { button.disabled = true; });
      }
      row.appendChild(cell);
    });
  }

  function schedule() {
    if (scheduled) return;
    scheduled = true;
    setTimeout(function () { scheduled = false; decorate(); }, 0);
  }

  document.addEventListener('click', async function (event) {
    const button = event.target.closest('[data-doffice-action]');
    if (!button || !allowed()) return;
    const row = button.closest('tr');
    const id = row && row.children[1] && row.children[1].textContent.trim();
    let member = members.get(id);
    if (!member) {
      await loadMembers();
      member = members.get(id);
    }
    if (!member) return alert('회원 정보를 다시 불러온 뒤 시도해 주세요.');
    const action = button.getAttribute('data-doffice-action');
    const question = action === 'delete'
      ? member.memName + ' (' + id + ') 계정을 삭제하시겠습니까? 기존 업무·이력은 유지됩니다.'
      : member.memName + ' (' + id + ') 비밀번호를 1234로 초기화하시겠습니까?';
    if (!confirm(question)) return;
    button.disabled = true;
    try {
      if (action === 'delete') {
        await api('/api/admin/deleteMember/' + encodeURIComponent(member.memCode), 'DELETE');
        alert('계정이 삭제되었습니다.');
        location.reload();
      } else {
        await api('/api/admin/resetPw?memCode=' + encodeURIComponent(member.memCode));
        alert('비밀번호가 1234로 초기화되었습니다.');
      }
    } catch (error) {
      alert(error.message);
    } finally {
      button.disabled = false;
    }
  });

  const observer = new MutationObserver(schedule);
  observer.observe(document.documentElement, {childList: true, subtree: true});
  setInterval(function () {
    if (location.pathname !== '/joinId' || !allowed()) return;
    if (!members.size) loadMembers();
    else schedule();
  }, 1500);
  document.addEventListener('submit', function () {
    if (location.pathname === '/joinId') setTimeout(loadMembers, 1200);
  }, true);
})();