Router.register('/settings', async () => {
  const me = await API.me().catch(()=>({}));
  const users = (me && me.role === 'superadmin') ? await API.adminUsers().catch(()=>({list:[]})) : {list:[]};
  const userList = (users.list||[]).map(u=>`<li><span>${u.username}</span><span class="badge">${u.role}</span></li>`).join('') || '<li>暂无用户</li>';
  const html = `<div class="grid cols-2">
    <div class="card">
      <div style="font-weight:600;margin-bottom:16px">账户设置</div>
      <div style="margin-bottom:16px">
        <div style="font-weight:500;margin-bottom:8px">当前用户</div>
        <div id="user-card" class="badge">${(me && me.username) ? me.username : '未登录'}</div>
      </div>
      <div style="margin-bottom:16px;padding-bottom:16px;border-bottom:1px solid var(--border)">
        <div style="font-weight:500;margin-bottom:12px">头像设置</div>
        <div style="display:flex;align-items:center;gap:16px;margin-bottom:12px">
          <img id="preview-avatar" src="${(me && me.avatar) ? me.avatar : './assets/user-avatar.svg'}" alt="头像预览" style="width:64px;height:64px;border-radius:50%;object-fit:cover;border:2px solid var(--border)" />
          <div style="flex:1">
            <div class="field" style="margin-bottom:8px">
              <label>选择头像图片</label>
              <input type="file" id="avatar-file" accept="image/*" class="input" style="padding:6px" />
            </div>
            <div style="font-size:12px;color:var(--text-2)">支持 JPG、PNG、GIF 等图片格式，建议尺寸 200x200 像素</div>
          </div>
        </div>
        <div class="actions">
          <button class="btn" id="upload-avatar-btn">上传头像</button>
          <button class="btn btn-secondary" id="reset-avatar-btn">恢复默认</button>
        </div>
      </div>
    </div>
    ${(me && me.role === 'superadmin') ? `
    <div class="card">
      <div style="font-weight:600;margin-bottom:16px">用户管理</div>
      
      <div style="margin-bottom:24px;padding-bottom:24px;border-bottom:1px solid var(--border)">
        <div style="font-weight:500;margin-bottom:12px">添加新用户</div>
        <div class="field">
          <label>用户名</label>
          <input id="new-username" class="input" placeholder="输入用户名" />
        </div>
        <div class="field">
          <label>密码</label>
          <input id="new-password" type="password" class="input" placeholder="输入密码" />
        </div>
        <div class="field">
          <label>角色</label>
          <select id="new-role" class="input">
            <option value="admin">管理员 (admin)</option>
            <option value="superadmin">超级管理员 (superadmin)</option>
          </select>
        </div>
        <div class="actions"><button id="add-user-btn" class="btn">添加用户</button></div>
      </div>

      <div style="margin-bottom:24px;padding-bottom:24px;border-bottom:1px solid var(--border)">
        <div style="font-weight:500;margin-bottom:12px">修改用户密码</div>
        <div class="field">
          <label>选择用户</label>
          <select id="reset-user" class="input">${(users.list||[]).map(u=>`<option value="${u.username}">${u.username}</option>`).join('')}</select>
        </div>
        <div class="field">
          <label>新密码</label>
          <input id="reset-pass" type="password" class="input" />
        </div>
        <div class="actions"><button id="change-btn" class="btn">修改密码</button></div>
      </div>

      <div style="font-weight:500;margin-bottom:12px">超级管理员工具</div>
      <div style="margin-top:12px"></div>
      <div class="grid cols-2" style="margin-top:8px">
        <div class="card">
          <div style="font-weight:600;margin-bottom:8px">清空上传数据</div>
          <div class="actions" style="flex-wrap:wrap;gap:6px">
            <button class="btn" data-clear="mac">清空MAC与批次</button>
            <button class="btn" data-clear="stats">清空良/不良统计</button>
            <button class="btn" data-clear="defects">清空不良明细</button>
            <button class="btn" data-clear="shipments">清空发货记录</button>
          </div>
        </div>
        <div class="card">
          <div style="font-weight:600;margin-bottom:8px">清空扩展采集</div>
          <div class="actions" style="flex-wrap:wrap;gap:6px">
            <button class="btn" data-clear="devices">清空设备状态</button>
            <button class="btn" data-clear="environment">清空环境参数</button>
            <button class="btn" data-clear="personnel">清空人员信息</button>
            <button class="btn" data-clear="qa">清空质检报告</button>
            <button class="btn" data-clear="production">清空生产时间</button>
          </div>
        </div>
      </div>
      <div style="margin-top:12px"></div>
      <div class="grid cols-2" style="margin-top:8px">
        <div class="card">
          <div style="font-weight:600;margin-bottom:8px">数据概览</div>
          <div class="grid cols-2">
            <div>
              <div class="badge" id="overview-stats">良/不良统计：加载中</div>
              <div class="badge" id="overview-defects">不良明细：加载中</div>
              <div class="badge" id="overview-mac">MAC与批次：加载中</div>
            </div>
            <div>
              <div class="badge" id="overview-shipments">发货记录：加载中</div>
              <div class="badge" id="overview-devices">设备状态：加载中</div>
              <div class="badge" id="overview-personnel">人员信息：加载中</div>
              <div class="badge" id="overview-qa">质检报告：加载中</div>
              <div class="badge" id="overview-production">生产时间：加载中</div>
            </div>
          </div>
        </div>
      </div>
      <div style="margin-top:12px"><div style="font-weight:600;margin-bottom:8px">用户列表</div><ul class="list">${userList}</ul></div>
    </div>
    ` : ''}
  </div>`;
  setTimeout(() => {
    // 头像文件选择预览
    const avatarFileInput = document.getElementById('avatar-file');
    const previewAvatar = document.getElementById('preview-avatar');
    
    avatarFileInput?.addEventListener('change', (e) => {
      const file = e.target.files?.[0];
      if (file) {
        // 验证文件类型
        if (!file.type.startsWith('image/')) {
          API.toast('请选择图片文件');
          avatarFileInput.value = '';
          return;
        }
        
        // 验证文件大小（限制2MB）
        if (file.size > 2 * 1024 * 1024) {
          API.toast('图片大小不能超过2MB');
          avatarFileInput.value = '';
          return;
        }
        
        // 预览图片
        const reader = new FileReader();
        reader.onload = (e) => {
          previewAvatar.src = e.target.result;
        };
        reader.readAsDataURL(file);
      }
    });
    
    // 上传头像
    const uploadAvatarBtn = document.getElementById('upload-avatar-btn');
    uploadAvatarBtn?.addEventListener('click', async () => {
      const file = avatarFileInput?.files?.[0];
      
      if (!file) {
        return API.toast('请先选择头像图片');
      }
      
      uploadAvatarBtn.disabled = true;
      try {
        const formData = new FormData();
        formData.append('avatar', file);
        
        const res = await fetch('/api/user/upload-avatar', {
          method: 'POST',
          body: formData,
          credentials: 'include'
        });
        
        const data = await res.json();
        
        if (res.ok && data.ok) {
          API.toast('头像上传成功');
          // 更新顶部用户头像显示
          const avatarImg = document.getElementById('user-avatar-img');
          if (avatarImg && data.avatar_url) {
            avatarImg.src = data.avatar_url;
          }
          // 如果有全局更新函数，调用它
          if (window.updateUserDisplay) {
            const updatedUser = await API.me().catch(() => null);
            window.updateUserDisplay(updatedUser);
          }
          // 清空文件选择
          avatarFileInput.value = '';
        } else {
          API.toast(data.error || '上传失败');
        }
      } catch(e) {
        API.toast('上传失败：' + e.message);
      } finally {
        uploadAvatarBtn.disabled = false;
      }
    });
    
    // 恢复默认头像
    const resetAvatarBtn = document.getElementById('reset-avatar-btn');
    resetAvatarBtn?.addEventListener('click', async () => {
      resetAvatarBtn.disabled = true;
      try {
        const res = await fetch('/api/user/reset-avatar', {
          method: 'POST',
          credentials: 'include'
        });
        
        const data = await res.json();
        
        if (res.ok && data.ok) {
          API.toast('已恢复默认头像');
          previewAvatar.src = './assets/user-avatar.svg';
          const avatarImg = document.getElementById('user-avatar-img');
          if (avatarImg) {
            avatarImg.src = './assets/user-avatar.svg';
          }
          if (avatarFileInput) avatarFileInput.value = '';
          // 如果有全局更新函数，调用它
          if (window.updateUserDisplay) {
            const updatedUser = await API.me().catch(() => null);
            window.updateUserDisplay(updatedUser);
          }
        } else {
          API.toast(data.error || '操作失败');
        }
      } catch(e) {
        API.toast('操作失败：' + e.message);
      } finally {
        resetAvatarBtn.disabled = false;
      }
    });
    
    // 添加新用户
    const addUserBtn = document.getElementById('add-user-btn');
    addUserBtn?.addEventListener('click', async () => {
      const usernameEl = document.getElementById('new-username');
      const passwordEl = document.getElementById('new-password');
      const roleEl = document.getElementById('new-role');
      
      const username = usernameEl?.value?.trim();
      const password = passwordEl?.value;
      const role = roleEl?.value || 'admin';
      
      if (!username || !password) {
        return API.toast('请输入用户名和密码');
      }
      
      if (password.length < 6) {
        return API.toast('密码长度至少6位');
      }
      
      addUserBtn.disabled = true;
      try {
        const res = await fetch('/api/admin/add-user', {
          method: 'POST',
          headers: { 'Content-Type': 'application/json' },
          credentials: 'include',
          body: JSON.stringify({ username, password, role })
        });
        
        const data = await res.json();
        
        if (res.ok && data.ok) {
          API.toast(data.message || '用户创建成功');
          // 清空输入框
          if (usernameEl) usernameEl.value = '';
          if (passwordEl) passwordEl.value = '';
          // 刷新页面以更新用户列表
          setTimeout(() => Router.navigate('/settings'), 1000);
        } else {
          API.toast(data.error || '创建失败');
        }
      } catch(e) {
        API.toast('创建失败：' + e.message);
      } finally {
        addUserBtn.disabled = false;
      }
    });

    // 修改密码
    const change = document.getElementById('change-btn');
    change?.addEventListener('click', async () => {
      const uEl = document.getElementById('reset-user');
      const pEl = document.getElementById('reset-pass');
      const u = uEl ? uEl.value : '';
      const p = pEl ? pEl.value : '';
      if (!u || !p) return API.toast('请输入用户与新密码');
      change.disabled = true;
      try {
        await API.changePassword(u, p);
        API.toast('已修改');
      } catch(e) {
        API.toast('修改失败');
      } finally {
        change.disabled = false;
      }
    });
    document.querySelectorAll('button[data-clear]')?.forEach(btn => {
      btn.addEventListener('click', async () => {
        const mod = btn.getAttribute('data-clear');
        btn.disabled = true;
        try{
          await API.clearModule(mod);
          API.toast('已清空');
        }catch(e){
          API.toast('清空失败');
        }finally{
          btn.disabled = false;
        }
      });
    });
    (async ()=>{
      const ov = await API.overview().catch(()=>null);
      const setText=(id, text)=>{const el=document.getElementById(id); if(el) el.textContent=text;}
      if (ov) {
        setText('overview-stats', `良/不良统计：${ov.stats.records} 条（良 ${ov.stats.goodTotal} / 不良 ${ov.stats.badTotal}）`);
        setText('overview-defects', `不良明细：${ov.defects} 条`);
        setText('overview-mac', `MAC与批次：${ov.mac} 条`);
        setText('overview-shipments', `发货记录：${ov.shipments.records} 条（总量 ${ov.shipments.qtyTotal}）`);
        setText('overview-devices', `设备状态：${ov.devices} 条`);
        setText('overview-personnel', `人员信息：${ov.personnel} 条`);
        setText('overview-qa', `质检报告：${ov.qa} 条`);
        setText('overview-production', `生产时间：${ov.production} 条`);
      }
    })();
  }, 0);
  return html;
});