(() => {
  let notificationInterval = null;
  let isOpen = false;
  let isInitialized = false;

  // 格式化时间
  function formatTime(ts) {
    if (!ts) return '';
    try {
      // 解析ISO格式的时间字符串（已经是北京时间）
      const date = new Date(ts);
      const now = new Date();
      
      // 计算时间差（毫秒）
      const diff = now - date;
      const minutes = Math.floor(diff / 60000);
      const hours = Math.floor(diff / 3600000);
      const days = Math.floor(diff / 86400000);

      if (minutes < 1) return '刚刚';
      if (minutes < 60) return `${minutes}分钟前`;
      if (hours < 24) return `${hours}小时前`;
      if (days < 7) return `${days}天前`;
      
      // 超过7天显示完整日期
      return date.toLocaleString('zh-CN', { 
        year: 'numeric', 
        month: '2-digit', 
        day: '2-digit',
        hour: '2-digit',
        minute: '2-digit'
      });
    } catch (e) {
      console.error('时间格式化错误:', e, ts);
      return ts;
    }
  }

  // 获取操作的中文描述
  function getActionText(action) {
    const actionMap = {
      '批量上传MAC文件': '批量上传了MAC文件',
      '批量上传发货记录文件': '批量上传了发货记录',
      '添加人员信息': '添加了人员信息',
      '上传发货记录': '上传了发货记录',
      '上传MAC与批次': '上传了MAC与批次',
      '批量上传不良明细文件': '批量上传了不良明细',
      '上传返修记录': '上传了返修记录',
      '上传良/不良统计': '上传了良/不良统计',
      '上传不良明细': '上传了不良明细',
      '添加工单': '添加了新工单'
    };
    return actionMap[action] || action;
  }

  // 更新未读数量
  async function updateUnreadCount() {
    try {
      const data = await API.getUnreadCount();
      const badge = document.getElementById('notification-badge');
      const count = data.count || 0;
      const previousCount = parseInt(badge.textContent) || 0;
      
      if (count > 0) {
        badge.textContent = count > 99 ? '99+' : count;
        badge.style.display = 'block';
        
        // 如果有新消息且面板是打开的，自动刷新列表
        if (count > previousCount && isOpen) {
          console.log('[Notifications] 检测到新消息，刷新列表');
          await loadNotifications();
        }
      } else {
        badge.style.display = 'none';
      }
    } catch (e) {
      console.error('获取未读数量失败:', e);
    }
  }

  // 加载通知列表
  async function loadNotifications() {
    try {
      const data = await API.getNotifications();
      const list = data.list || [];
      const container = document.getElementById('notification-list');
      
      if (list.length === 0) {
        container.innerHTML = '<div class="notification-empty">暂无消息通知</div>';
        return;
      }

      container.innerHTML = list.map(item => `
        <div class="notification-item ${item.read ? '' : 'unread'}" data-id="${item.id}">
          <div class="notification-username">${item.username || '用户'}</div>
          <div class="notification-action">${getActionText(item.action)}</div>
          ${item.detail ? `<div class="notification-detail">${item.detail}</div>` : ''}
          <div class="notification-time">${formatTime(item.ts)}</div>
        </div>
      `).join('');

      // 为每个通知项添加点击事件
      container.querySelectorAll('.notification-item').forEach(item => {
        item.addEventListener('click', async () => {
          const id = item.dataset.id;
          if (item.classList.contains('unread')) {
            try {
              await API.markNotificationRead(id);
              item.classList.remove('unread');
              await updateUnreadCount();
            } catch (e) {
              console.error('标记已读失败:', e);
            }
          }
        });
      });
    } catch (e) {
      console.error('加载通知失败:', e);
    }
  }

  // 切换通知面板
  function togglePanel() {
    const panel = document.getElementById('notification-panel');
    if (!panel) {
      console.error('[Notifications] 找不到面板元素');
      return;
    }
    
    isOpen = !isOpen;
    console.log('[Notifications] 面板状态:', isOpen ? '打开' : '关闭');
    
    if (isOpen) {
      panel.style.display = 'flex';
      loadNotifications();
    } else {
      panel.style.display = 'none';
    }
  }

  // 初始化通知系统
  async function initNotifications() {
    // 防止重复初始化
    if (isInitialized) {
      console.log('[Notifications] 已经初始化，跳过');
      return;
    }

    try {
      // 检查用户角色
      const user = await API.me();
      if (user.role !== 'superadmin' && user.role !== 'admin') {
        console.log('[Notifications] 非管理员，不显示通知');
        return; // 超级管理员和管理员才显示通知铃铛
      }

      // 显示通知铃铛
      const bell = document.getElementById('notification-bell');
      if (!bell) {
        console.error('[Notifications] 找不到铃铛元素');
        return;
      }
      
      bell.style.display = 'inline-flex';
      console.log('[Notifications] 铃铛已显示');

      // 移除旧的事件监听器（如果有）
      const newBell = bell.cloneNode(true);
      bell.parentNode.replaceChild(newBell, bell);

      // 绑定铃铛点击事件
      newBell.addEventListener('click', (e) => {
        console.log('[Notifications] 铃铛被点击');
        e.preventDefault();
        e.stopPropagation();
        togglePanel();
      });

      // 绑定全部标记为已读按钮（移除旧的事件监听器）
      const markAllBtn = document.getElementById('mark-all-read');
      if (markAllBtn) {
        const newMarkAllBtn = markAllBtn.cloneNode(true);
        markAllBtn.parentNode.replaceChild(newMarkAllBtn, markAllBtn);
        
        newMarkAllBtn.addEventListener('click', async (e) => {
          e.stopPropagation();
          try {
            await API.markAllNotificationsRead();
            await loadNotifications();
            await updateUnreadCount();
            API.toast('已全部标记为已读');
          } catch (e) {
            console.error('标记全部已读失败:', e);
          }
        });
      }

      // 绑定删除已读消息按钮（移除旧的事件监听器）
      const deleteBtn = document.getElementById('delete-read');
      if (deleteBtn) {
        const newDeleteBtn = deleteBtn.cloneNode(true);
        deleteBtn.parentNode.replaceChild(newDeleteBtn, deleteBtn);
        
        newDeleteBtn.addEventListener('click', async (e) => {
          e.stopPropagation();
          if (!confirm('确定要删除所有已读消息吗？')) {
            return;
          }
          try {
            const result = await API.deleteReadNotifications();
            await loadNotifications();
            await updateUnreadCount();
            API.toast(`已删除 ${result.count || 0} 条已读消息`);
          } catch (e) {
            console.error('删除已读消息失败:', e);
          }
        });
      }

      // 点击其他地方关闭面板
      document.addEventListener('click', (e) => {
        const panel = document.getElementById('notification-panel');
        const currentBell = document.getElementById('notification-bell');
        if (isOpen && panel && currentBell && !panel.contains(e.target) && !currentBell.contains(e.target)) {
          isOpen = false;
          panel.style.display = 'none';
        }
      });

      // 初始加载未读数量
      await updateUnreadCount();

      // 每5秒更新一次未读数量（实时检查新消息）
      if (notificationInterval) {
        clearInterval(notificationInterval);
      }
      notificationInterval = setInterval(updateUnreadCount, 5000);

      isInitialized = true;
      console.log('[Notifications] 初始化完成，实时轮询已启动（5秒间隔）');
    } catch (e) {
      console.error('初始化通知系统失败:', e);
    }
  }

  // 清理定时器
  function cleanupNotifications() {
    if (notificationInterval) {
      clearInterval(notificationInterval);
      notificationInterval = null;
    }
    isInitialized = false;
    isOpen = false;
    console.log('[Notifications] 已清理');
  }

  // 导出到全局
  window.NotificationSystem = {
    init: initNotifications,
    cleanup: cleanupNotifications,
    refresh: updateUnreadCount
  };
})();