'use client';

import Link from 'next/link';
import { usePathname } from 'next/navigation';
import { cn } from '@/lib/utils';
import { getUserRole } from '@/lib/api';
import { useState, useEffect } from 'react';
import { useSidebar } from '@/lib/SidebarContext';
import ThemeToggle from './ThemeToggle';

interface NavItem {
  label: string;
  href: string;
  icon: string;
  roles?: string[];
  children?: { label: string; href: string }[];
}

const navItems: NavItem[] = [
  {
    label: 'Dashboard',
    href: '/admin/dashboard',
    icon: '📊',
  },
  {
    label: 'Benefactors',
    href: '/admin/benefactors',
    icon: '👥',
    roles: ['super-admin', 'admin'],
  },
  {
    label: 'Agents',
    href: '/admin/agents',
    icon: '🤝',
    roles: ['super-admin', 'admin'],
  },
  {
    label: 'Kind Boxes',
    href: '/admin/kind-boxes',
    icon: '📦',
    roles: ['super-admin', 'admin'],
    children: [
      { label: 'All Boxes', href: '/admin/kind-boxes' },
      { label: 'Create', href: '/admin/kind-boxes/create' },
    ],
  },
  {
    label: 'Kind Box Requests',
    href: '/admin/kind-box-requests',
    icon: '📋',
    roles: ['super-admin', 'admin'],
    children: [
      { label: 'All Requests', href: '/admin/kind-box-requests' },
      { label: 'Create', href: '/admin/kind-box-requests/create' },
    ],
  },
  {
    label: 'Refer Times',
    href: '/admin/refer-times',
    icon: '⏰',
    roles: ['super-admin', 'admin'],
  },
  {
    label: 'My Kind Boxes',
    href: '/benefactor/kind-boxes',
    icon: '📦',
    roles: ['benefactor'],
  },
  {
    label: 'My Requests',
    href: '/benefactor/kind-box-requests',
    icon: '📋',
    roles: ['benefactor'],
  },
  {
    label: 'My Addresses',
    href: '/benefactor/addresses',
    icon: '📍',
    roles: ['benefactor'],
  },
  {
    label: 'Refer Times',
    href: '/benefactor/refer-times',
    icon: '⏰',
    roles: ['benefactor'],
  },
  {
    label: 'Agent Dashboard',
    href: '/agent/dashboard',
    icon: '🎯',
    roles: ['agent'],
  },
  {
    label: 'Return Awaiting',
    href: '/agent/kind-boxes',
    icon: '📥',
    roles: ['agent'],
  },
  {
    label: 'Delivery Awaiting',
    href: '/agent/kind-box-requests',
    icon: '📤',
    roles: ['agent'],
  },
  {
    label: 'Products',
    href: '/products',
    icon: '🛍️',
  },
  {
    label: 'Cart',
    href: '/cart',
    icon: '🛒',
  },
  {
    label: 'Orders',
    href: '/orders',
    icon: '📦',
  },
  {
    label: 'Campaigns',
    href: '/campaigns',
    icon: '🎯',
  },
  {
    label: 'Wallet',
    href: '/wallet',
    icon: '💳',
  },
  {
    label: 'Patients',
    href: '/patients',
    icon: '🏥',
    roles: ['super-admin', 'admin'],
  },
  {
    label: 'Drivers',
    href: '/drivers',
    icon: '🚗',
    roles: ['super-admin', 'admin'],
  },
  {
    label: 'Staff',
    href: '/staff',
    icon: '👔',
    roles: ['super-admin', 'admin'],
  },
  {
    label: 'Sales Reports',
    href: '/sales-reports',
    icon: '📈',
    roles: ['super-admin', 'admin'],
  },
  {
    label: 'Gamification',
    href: '/gamification',
    icon: '🏆',
    roles: ['super-admin', 'admin'],
  },
];

export default function Sidebar() {
  const pathname = usePathname();
  const [role, setRole] = useState<string | null>(null);
  const { collapsed, toggle } = useSidebar();

  useEffect(() => {
    setRole(getUserRole());
  }, []);

  // Don't render sidebar on login or landing page
  if (pathname === '/login' || pathname === '/') {
    return null;
  }

  const filteredItems = navItems.filter((item) => {
    if (!item.roles || item.roles.length === 0) return true;
    return role && item.roles.includes(role);
  });

  const isActive = (href: string) => {
    return pathname.startsWith(href);
  };

  return (
    <aside
      className={cn(
        'fixed left-0 top-0 h-screen bg-white dark:bg-gray-900 border-r border-gray-200 dark:border-gray-700 z-30 transition-all duration-300 flex flex-col',
        collapsed ? 'w-[60px]' : 'w-[260px]'
      )}
    >
      {/* Logo */}
      <div className="flex items-center gap-3 px-4 h-16 border-b border-gray-200 dark:border-gray-700">
        <div className="w-8 h-8 rounded-lg bg-gradient-to-br from-blue-500 to-purple-600 flex items-center justify-center text-white font-bold text-sm shrink-0">
          N
        </div>
        {!collapsed && (
          <>
            <span className="font-bold text-lg bg-gradient-to-r from-blue-600 to-purple-600 bg-clip-text text-transparent flex-1">
              Niki
            </span>
            <ThemeToggle />
          </>
        )}
        {collapsed && (
          <div className="flex-1 flex justify-center">
            <ThemeToggle />
          </div>
        )}
      </div>

      {/* Navigation */}
      <nav className="flex-1 overflow-y-auto p-3 space-y-1">
        {filteredItems.map((item) => {
          const active = isActive(item.href);
          return (
            <div key={item.href}>
              <Link
                href={item.href}
                className={cn(
                  'sidebar-link',
                  active && 'active',
                  collapsed && 'justify-center px-2'
                )}
                title={collapsed ? item.label : undefined}
              >
                <span className="text-lg shrink-0">{item.icon}</span>
                {!collapsed && <span>{item.label}</span>}
              </Link>
            </div>
          );
        })}
      </nav>

      {/* Collapse toggle */}
      <button
        onClick={toggle}
        className="p-3 border-t border-gray-200 dark:border-gray-700 hover:bg-gray-50 dark:hover:bg-gray-800 transition-colors flex items-center justify-center text-gray-400"
      >
        <span className="text-sm">{collapsed ? '→' : '←'}</span>
      </button>
    </aside>
  );
}