import { useState, useEffect, useRef } from 'react';
import { Link, useLocation } from 'react-router-dom';
import { Users, ShoppingCart, Tag, Settings, TrendingUp, FolderTree, FileText, BookOpen, Heart, Package, LayoutDashboard, Languages, Image, Video, PhoneCall, Sparkles, MessageSquareQuote, FlaskConical, Building2, Globe, DollarSign, Sliders, MessageSquare, Receipt, CreditCard } from 'lucide-react';
import api from '../services/api';

const menuGroups = [
  {
    title: 'اصلی',
    items: [
      { icon: LayoutDashboard, label: 'داشبورد', path: '/' },
      { icon: TrendingUp, label: 'گزارشات', path: '/reports' },
    ]
  },
  {
    title: 'فروشگاه و تخصصی',
    items: [
      { icon: ShoppingCart, label: 'سفارشات', path: '/orders' },
      { icon: Receipt, label: 'تراکنش‌ها و لاگ پرداخت', path: '/transactions' },
      { icon: Package, label: 'محصولات', path: '/products' },
      { icon: FolderTree, label: 'دسته‌بندی‌ها', path: '/categories' },
      { icon: Tag, label: 'کدهای تخفیف', path: '/coupons' },
      { icon: Sparkles, label: 'مشاور هوشمند', path: '/smart-advisor' },
      { icon: FileText, label: 'نسخه‌های پزشکی', path: '/prescriptions' },
    ]
  },
  {
    title: 'مدیریت و همکاران B2B',
    items: [
      { icon: Users, label: 'کاربران', path: '/users' },
      { icon: Heart, label: 'حیوانات (Pets)', path: '/pets' },
      { icon: Building2, label: 'مدیریت B2B & عمده', path: '/b2b' },
      { icon: PhoneCall, label: 'تماس با ما & اطلاعات', path: '/contact' },
    ]
  },
  {
    title: 'محتوا و دانشنامه',
    items: [
      { icon: Image, label: 'بنرها و اسلایدرها', path: '/banners' },
      { icon: FlaskConical, label: 'دانشنامه ترکیبات', path: '/ingredients' },
      { icon: MessageSquareQuote, label: 'نظرات و گواهی‌ها', path: '/testimonials' },
      { icon: FileText, label: 'وبلاگ', path: '/blogs' },
      { icon: BookOpen, label: 'دانشنامه عمومی', path: '/wiki' },
      { icon: Video, label: 'مدیریت ویدئوها', path: '/videos' },
    ]
  },
  {
    title: 'سیستم و تنظیمات',
    items: [
      { icon: Settings, label: 'تنظیمات کلی', path: '/settings' },
      { icon: MessageSquare, label: 'تنظیمات پیامک', path: '/settings/sms' },
      { icon: Globe, label: 'تنظیمات سئو', path: '/settings/seo' },
      { icon: DollarSign, label: 'تنظیمات مالی & ارسال', path: '/settings/financial' },
      { icon: Sliders, label: 'تنظیمات سیستمی', path: '/settings/system' },
      { icon: Languages, label: 'متون رابط کاربری', path: '/ui-texts' },
      { icon: Image, label: 'مدیریت رسانه', path: '/media' },
    ]
  }
];

interface SidebarProps {
  isOpen: boolean;
  setIsOpen: (val: boolean) => void;
}

export default function Sidebar({ isOpen, setIsOpen }: SidebarProps) {
  const location = useLocation();
  const [newOrdersCount, setNewOrdersCount] = useState(0);
  const intervalRef = useRef<ReturnType<typeof setInterval> | null>(null);

  useEffect(() => {
    const fetchOrdersCount = async () => {
      try {
        const response = await api.get('/admin/dashboard/stats');
        if (response.data?.success) {
          setNewOrdersCount(response.data.data.newOrders);
        }
      } catch (err) {
        console.error('Failed to fetch stats in sidebar', err);
      }
    };
    fetchOrdersCount();
    intervalRef.current = setInterval(fetchOrdersCount, 60000);
    return () => {
      if (intervalRef.current) clearInterval(intervalRef.current);
    };
  }, []);

  return (
    <>
      {/* Mobile Backdrop */}
      {isOpen && (
        <div
          className="fixed inset-0 bg-black/50 z-40 lg:hidden backdrop-blur-sm"
          onClick={() => setIsOpen(false)}
        />
      )}

      <aside className={`w-64 bg-white border-l border-gray-200 h-screen fixed lg:fixed lg:right-0 lg:top-0 lg:bottom-0 flex flex-col font-vazir shadow-sm z-50 transform transition-transform duration-300 ease-in-out ${isOpen ? 'translate-x-0' : 'translate-x-full lg:translate-x-0'
        }`}>
        <div className="h-16 flex items-center justify-center border-b border-gray-200 shrink-0">
          <h1 className="text-xl font-black text-purple-600">کانینا | ادمین‌پنل</h1>
        </div>

        <nav className="flex-1 overflow-y-auto py-4 px-3 space-y-6">
          {menuGroups.map((group, idx) => (
            <div key={idx}>
              <h3 className="px-3 mb-2 text-xs font-black text-gray-400 uppercase tracking-wider">{group.title}</h3>
              <div className="space-y-1">
                {group.items.map((item) => {
                  const isActive = location.pathname === item.path || (item.path !== '/' && location.pathname.startsWith(item.path));
                  const Icon = item.icon;

                  return (
                    <Link
                      key={item.path}
                      to={item.path}
                      className={`flex items-center gap-3 px-3 py-2.5 rounded-xl transition-all font-bold ${isActive
                          ? 'bg-purple-50 text-purple-600'
                          : 'text-gray-500 hover:bg-gray-50 hover:text-gray-900'
                        }`}
                    >
                      <Icon className="w-5 h-5" />
                      <span>{item.label}</span>
                      {item.label === 'سفارشات' && newOrdersCount > 0 && (
                        <span className="mr-auto bg-purple-600 text-white text-[11px] font-black px-2 py-0.5 rounded-full min-w-[20px] text-center">
                          {newOrdersCount}
                        </span>
                      )}
                    </Link>
                  );
                })}
              </div>
            </div>
          ))}
        </nav>
      </aside>
    </>
  );
}