import { Link, useLocation } from 'react-router-dom'
import type { ReactNode } from 'react'
import {
  ApartmentOutlined,
  ClockCircleOutlined,
  CloudServerOutlined,
  ClusterOutlined,
  CrownOutlined,
  DashboardOutlined,
  DatabaseOutlined,
  FireOutlined,
  GlobalOutlined,
  NodeIndexOutlined,
  SafetyCertificateOutlined,
  SettingOutlined,
  ThunderboltOutlined,
} from '@ant-design/icons'
import { useTranslation } from 'react-i18next'

interface SidebarProps {
  isOpen: boolean
  onClose?: () => void
}

interface NavItem {
  path: string
  labelKey: string
  icon: ReactNode
}

interface NavSection {
  labelKey: string
  items: NavItem[]
}

const NAV: NavSection[] = [
  {
    labelKey: 'nav.section.overview',
    items: [
      { path: '/dashboard', labelKey: 'nav.dashboard', icon: <DashboardOutlined /> },
    ],
  },
  {
    labelKey: 'nav.section.routing',
    items: [
      { path: '/domains',  labelKey: 'nav.domains',  icon: <GlobalOutlined /> },
      { path: '/backends', labelKey: 'nav.backends', icon: <DatabaseOutlined /> },
    ],
  },
  {
    labelKey: 'nav.section.network',
    items: [
      { path: '/networks',     labelKey: 'nav.networks',    icon: <ClusterOutlined /> },
      { path: '/ip-addresses', labelKey: 'nav.ipAddresses', icon: <NodeIndexOutlined /> },
      { path: '/ssl',          labelKey: 'nav.ssl',         icon: <SafetyCertificateOutlined /> },
      { path: '/dns',          labelKey: 'nav.dns',         icon: <GlobalOutlined /> },
      { path: '/ntp',          labelKey: 'nav.ntp',         icon: <ClockCircleOutlined /> },
    ],
  },
  {
    labelKey: 'nav.section.security',
    items: [
      { path: '/firewall',       labelKey: 'nav.firewall',     icon: <FireOutlined /> },
      { path: '/vpn/wireguard',  labelKey: 'nav.wireguard',    icon: <ThunderboltOutlined /> },
      { path: '/forward-proxy',  labelKey: 'nav.forwardProxy', icon: <CloudServerOutlined /> },
    ],
  },
  {
    labelKey: 'nav.section.system',
    items: [
      { path: '/cluster',  labelKey: 'nav.cluster',  icon: <ApartmentOutlined /> },
      { path: '/license',  labelKey: 'nav.license',  icon: <CrownOutlined /> },
      { path: '/settings', labelKey: 'nav.settings', icon: <SettingOutlined /> },
    ],
  },
]

const VERSION = '1.0.59'

// Sidebar-Pattern 1:1 aus netcell-webpanel (enconf) übernommen:
// - <nav> als root, dunkler Gradient + Teal/Blue-Accent
// - Section-Label-Div NEBEN dem <ul>, nicht verschachtelt
// - <Link> + pathname-Vergleich für active-State (ein <li>.active::before
//   rendert den Akzent-Stab links + tint die Item-Background)
// CSS lebt in styles/enterprise.css (.sidebar*).
export default function Sidebar({ isOpen, onClose }: SidebarProps) {
  const { t } = useTranslation()
  const location = useLocation()

  return (
    <nav className={`sidebar${isOpen ? ' open' : ''}`}>
      <div className="sidebar-logo">
        <div className="sidebar-logo-icon">EG</div>
        <span className="sidebar-logo-text">{t('app.title')}</span>
      </div>

      {NAV.map((section) => (
        <div key={section.labelKey}>
          <div className="sidebar-section">
            <div className="sidebar-section-label">{t(section.labelKey)}</div>
          </div>
          <ul className="sidebar-menu">
            {section.items.map((item) => {
              const isActive = location.pathname === item.path
                || location.pathname.startsWith(item.path + '/')
              return (
                <li
                  key={item.path}
                  className={`sidebar-menu-item${isActive ? ' active' : ''}`}
                >
                  <Link to={item.path} onClick={onClose}>
                    {item.icon}
                    <span>{t(item.labelKey)}</span>
                  </Link>
                </li>
              )
            })}
          </ul>
        </div>
      ))}

      <div className="sidebar-version">v{VERSION}</div>
    </nav>
  )
}