'use client'

import { useState } from 'react'
import Link from 'next/link'
import { usePathname } from 'next/navigation'
import {
  LayoutDashboard,
  Users,
  CreditCard,
  Settings,
  FileText,
  Menu,
  X,
  LogOut,
  BarChart3,
  Download,
} from 'lucide-react'
import { Button } from '@/components/ui/button'
import { cn } from '@/lib/utils'

interface AdminLayoutProps {
  children: React.ReactNode
}

const navigation = [
  {
    name: 'Dashboard',
    href: '/admin',
    icon: LayoutDashboard,
  },
  {
    name: 'Users',
    href: '/admin/users',
    icon: Users,
  },
  {
    name: 'Billing',
    href: '/admin/billing',
    icon: CreditCard,
  },
  {
    name: 'Services',
    href: '/admin/services',
    icon: FileText,
  },
  {
    name: 'Analytics',
    href: '/admin/analytics',
    icon: BarChart3,
  },
  {
    name: 'Reports',
    href: '/admin/reports',
    icon: Download,
  },
  {
    name: 'Settings',
    href: '/admin/settings',
    icon: Settings,
  },
]

export default function AdminLayout({ children }: AdminLayoutProps) {
  const [sidebarOpen, setSidebarOpen] = useState(false)
  const pathname = usePathname()

  const handleLogout = () => {
    // Clear auth tokens and redirect
    document.cookie = 'token=; path=/; expires=Thu, 01 Jan 1970 00:00:01 GMT'
    localStorage.removeItem('token')
    window.location.href = '/auth'
  }

  return (
    <div className="min-h-screen bg-gradient-to-br from-gray-50 via-white to-blue-50 dark:from-gray-900 dark:via-gray-800 dark:to-gray-900">
      {/* Mobile sidebar overlay */}
      {sidebarOpen && (
        <div
          className="fixed inset-0 z-40 bg-black bg-opacity-50 lg:hidden"
          onClick={() => setSidebarOpen(false)}
        />
      )}

      {/* Sidebar */}
      <div
        className={cn(
          'fixed inset-y-0 left-0 z-50 w-64 bg-white dark:bg-gray-900 border-r border-gray-200 dark:border-gray-700 shadow-xl transform transition-transform duration-300 ease-in-out lg:translate-x-0',
          sidebarOpen ? 'translate-x-0' : '-translate-x-full'
        )}
      >
        <div className="flex h-full flex-col">
          {/* Logo */}
          <div className="flex h-16 items-center justify-between px-6 border-b border-gray-200 dark:border-gray-700">
            <Link href="/admin" className="flex items-center space-x-2">
              <div className="w-8 h-8 bg-gradient-to-r from-blue-500 to-indigo-600 rounded-lg flex items-center justify-center shadow-lg">
                <span className="text-white font-bold text-sm">SP</span>
              </div>
              <span className="text-xl font-bold text-gray-900 dark:text-white">Admin</span>
            </Link>
            <Button
              variant="ghost"
              size="sm"
              className="lg:hidden"
              onClick={() => setSidebarOpen(false)}
            >
              <X className="h-5 w-5" />
            </Button>
          </div>

          {/* Navigation */}
          <nav className="flex-1 px-4 py-6 space-y-1">
            {navigation.map((item) => {
              const isActive =
                pathname === item.href || (item.href !== '/admin' && pathname.startsWith(item.href))

              return (
                <Link
                  key={item.name}
                  href={item.href}
                  className={cn(
                    'flex items-center px-3 py-3 text-sm font-medium rounded-lg transition-all duration-200 group',
                    isActive
                      ? 'bg-blue-600 dark:bg-blue-500 text-white shadow-md'
                      : 'text-gray-700 dark:text-gray-300 hover:text-gray-900 dark:hover:text-white hover:bg-gray-100 dark:hover:bg-gray-800'
                  )}
                  onClick={() => setSidebarOpen(false)}
                >
                  <item.icon
                    className={cn(
                      'mr-3 h-5 w-5 transition-colors',
                      isActive
                        ? 'text-white'
                        : 'text-gray-500 dark:text-gray-400 group-hover:text-gray-700 dark:group-hover:text-gray-300'
                    )}
                  />
                  {item.name}
                </Link>
              )
            })}
          </nav>

          {/* Logout */}
          <div className="p-4 border-t border-gray-200 dark:border-gray-700">
            <Button
              variant="ghost"
              className="w-full justify-start text-red-600 dark:text-red-400 hover:text-red-700 dark:hover:text-red-300 hover:bg-red-50 dark:hover:bg-red-900/20 rounded-lg transition-all duration-200"
              onClick={handleLogout}
            >
              <LogOut className="mr-3 h-5 w-5" />
              Logout
            </Button>
          </div>
        </div>
      </div>

      {/* Main content */}
      <div className="lg:pl-64">
        {/* Top bar */}
        <div className="sticky top-0 z-30 bg-white/90 dark:bg-gray-900/90 backdrop-blur-md border-b border-gray-200 dark:border-gray-700 px-4 py-3 lg:px-6 shadow-sm">
          <div className="flex items-center justify-between">
            <Button
              variant="ghost"
              size="sm"
              className="lg:hidden text-gray-600 dark:text-gray-400 hover:text-gray-900 dark:hover:text-white hover:bg-gray-100 dark:hover:bg-gray-800"
              onClick={() => setSidebarOpen(true)}
            >
              <Menu className="h-5 w-5" />
            </Button>

            <div className="flex items-center space-x-4">
              <div className="flex items-center space-x-2">
                <div className="w-2 h-2 bg-green-500 rounded-full animate-pulse"></div>
                <span className="text-sm font-medium text-gray-800 dark:text-gray-200">
                  SiliconPin Admin Panel
                </span>
              </div>
            </div>
          </div>
        </div>

        {/* Page content */}
        <main className="p-4 lg:p-6">
          <div className="max-w-7xl mx-auto">{children}</div>
        </main>
      </div>
    </div>
  )
}