'use client';

import { useState } from 'react';
import { Bell } from 'lucide-react';
import { Button } from '@/components/ui/button';
import { useNotificationHub } from '@/lib/hooks/useNotificationHub';
import { Badge } from '@/components/ui/badge';

export function NotificationPopover() {
  const { notifications, connectionState, clearNotifications, isConnected } =
    useNotificationHub();
  const [isOpen, setIsOpen] = useState(false);

  const unreadCount = notifications.length;

  return (
    <div className="relative">
      <Button
        variant="ghost"
        size="icon"
        onClick={() => setIsOpen(!isOpen)}
        className="relative"
      >
        <Bell className="h-5 w-5" />
        {unreadCount > 0 && (
          <Badge
            className="absolute -right-1 -top-1 flex h-5 w-5 items-center justify-center p-0 text-xs"
            variant="destructive"
          >
            {unreadCount > 9 ? '9+' : unreadCount}
          </Badge>
        )}
      </Button>

      {isOpen && (
        <div className="absolute right-0 z-50 mt-2 w-80 rounded-lg border border-gray-200 bg-white shadow-lg">
          <div className="flex items-center justify-between border-b border-gray-200 p-4">
            <div className="flex items-center gap-2">
              <h3 className="font-semibold">Notifications</h3>
              <div
                className={`h-2 w-2 rounded-full ${
                  isConnected ? 'bg-green-500' : 'bg-gray-400'
                }`}
              />
            </div>
            {unreadCount > 0 && (
              <Button variant="ghost" size="sm" onClick={clearNotifications}>
                Clear all
              </Button>
            )}
          </div>

          <div className="max-h-96 overflow-y-auto">
            {notifications.length === 0 ? (
              <div className="p-8 text-center text-gray-500">
                <Bell className="mx-auto mb-2 h-12 w-12 opacity-50" />
                <p>No notifications</p>
              </div>
            ) : (
              <div className="divide-y">
                {notifications.map((notification, index) => (
                  <div key={index} className="p-4 hover:bg-gray-50">
                    <div className="flex items-start gap-3">
                      <div
                        className={`mt-2 h-2 w-2 rounded-full ${
                          notification.type === 'error'
                            ? 'bg-red-500'
                            : notification.type === 'success'
                              ? 'bg-green-500'
                              : notification.type === 'warning'
                                ? 'bg-yellow-500'
                                : 'bg-blue-500'
                        }`}
                      />
                      <div className="flex-1">
                        <p className="text-sm">{notification.message}</p>
                        <p className="mt-1 text-xs text-gray-500">
                          {new Date(notification.timestamp).toLocaleString()}
                        </p>
                      </div>
                    </div>
                  </div>
                ))}
              </div>
            )}
          </div>

          <div className="border-t border-gray-200 p-2 text-center text-xs text-gray-500">
            {connectionState === 'connected' && 'Connected'}
            {connectionState === 'connecting' && 'Connecting...'}
            {connectionState === 'reconnecting' && 'Reconnecting...'}
            {connectionState === 'disconnected' && 'Disconnected'}
          </div>
        </div>
      )}
    </div>
  );
}