'use client'

import Link from 'next/link'
import { usePathname } from 'next/navigation'
import { useEffect, useState } from 'react'
import {
  AdminLanguageSwitcher,
  AdminThemeSwitcher,
  useAdminI18n,
} from '@/components/I18nProvider'
import { resolveBrowserAppUrl } from '@/lib/appUrls'

function buildUnifiedLoginUrl(nextPath: string) {
  const dashboardUrl = resolveBrowserAppUrl(process.env.NEXT_PUBLIC_DASHBOARD_URL ?? 'http://localhost:3001')
  const params = new URLSearchParams({
    portal: 'admin',
    next: nextPath || '/dashboard',
  })
  return `${dashboardUrl}/sign-in?${params.toString()}`
}

const navLinks = [
  { href: '/dashboard', key: 'overview', icon: 'M3 12l2-2m0 0l7-7 7 7M5 10v10a1 1 0 001 1h3m10-11l2 2m-2-2v10a1 1 0 01-1 1h-3m-6 0a1 1 0 001-1v-4a1 1 0 011-1h2a1 1 0 011 1v4a1 1 0 001 1m-6 0h6' },
  { href: '/dashboard/companies', key: 'companies', icon: 'M19 21V5a2 2 0 00-2-2H7a2 2 0 00-2 2v16m14 0h2m-2 0h-5m-9 0H3m2 0h5M9 7h1m-1 4h1m4-4h1m-1 4h1m-5 10v-5a1 1 0 011-1h2a1 1 0 011 1v5m-4 0h4' },
  { href: '/dashboard/site-config', key: 'siteConfig', icon: 'M4.5 12a7.5 7.5 0 1015 0 7.5 7.5 0 00-15 0zm7.5-4.5v4.5l3 3' },
  { href: '/dashboard/renters', key: 'renters', icon: 'M17 20h5v-2a3 3 0 00-5.356-1.857M17 20H7m10 0v-2c0-.656-.126-1.283-.356-1.857M7 20H2v-2a3 3 0 015.356-1.857M7 20v-2c0-.656.126-1.283.356-1.857m0 0a5.002 5.002 0 019.288 0M15 7a3 3 0 11-6 0 3 3 0 016 0z' },
  { href: '/dashboard/audit-logs', key: 'auditLogs', icon: 'M9 12h6m-6 4h6m2 5H7a2 2 0 01-2-2V5a2 2 0 012-2h5.586a1 1 0 01.707.293l5.414 5.414a1 1 0 01.293.707V19a2 2 0 01-2 2z' },
  { href: '/dashboard/admin-users', key: 'adminUsers', icon: 'M12 4.354a4 4 0 110 5.292M15 21H3v-1a6 6 0 0112 0v1zm0 0h6v-1a6 6 0 00-9-5.197M13 7a4 4 0 11-8 0 4 4 0 018 0z' },
  { href: '/dashboard/billing', key: 'billing', icon: 'M3 10h18M7 15h1m4 0h1m-7 4h12a3 3 0 003-3V8a3 3 0 00-3-3H6a3 3 0 00-3 3v8a3 3 0 003 3z' },
]

export default function AdminDashboardLayout({ children }: { children: React.ReactNode }) {
  const { dict } = useAdminI18n()
  const pathname = usePathname()
  const [ready, setReady] = useState(false)

  useEffect(() => {
    const token = localStorage.getItem('admin_token')
    if (!token) {
      window.location.replace(buildUnifiedLoginUrl(pathname))
    } else {
      setReady(true)
    }
  }, [pathname])

  function handleLogout() {
    localStorage.removeItem('admin_token')
    window.location.href = buildUnifiedLoginUrl('/dashboard')
  }

  if (!ready) {
    return (
        <div className="flex h-screen items-center justify-center bg-zinc-950">
        <div className="h-6 w-6 rounded-full border-2 border-emerald-500 border-t-transparent animate-spin" aria-label={dict.loading} />
        </div>
      )
  }

  return (
    <div className="flex h-screen bg-zinc-950 text-zinc-100 transition-colors">
      <aside className="w-60 flex-shrink-0 flex flex-col border-r border-zinc-800 bg-zinc-900 transition-colors">
        <Link href="/" className="block px-5 py-6">
          <p className="text-xs font-semibold uppercase tracking-[0.2em] text-emerald-400">{dict.admin}</p>
          <p className="mt-0.5 text-sm font-semibold text-zinc-100">RentalDriveGo</p>
        </Link>
        <nav className="flex-1 px-3 space-y-0.5">
          {navLinks.map((link) => {
            const active = pathname === link.href || (link.href !== '/dashboard' && pathname.startsWith(link.href))
            return (
              <Link
                key={link.href}
                href={link.href}
                className={`flex items-center gap-3 px-3 py-2.5 rounded-xl text-sm font-medium transition-colors ${
                  active ? 'bg-zinc-800 text-zinc-100' : 'text-zinc-400 hover:text-zinc-200 hover:bg-zinc-800/50'
                }`}
              >
                <svg className="h-4 w-4 flex-shrink-0" fill="none" viewBox="0 0 24 24" stroke="currentColor" strokeWidth={1.5}>
                  <path strokeLinecap="round" strokeLinejoin="round" d={link.icon} />
                </svg>
                {dict.nav[link.key]}
              </Link>
            )
          })}
        </nav>
        <div className="px-3 py-4">
          <button
            onClick={handleLogout}
            className="flex w-full items-center gap-3 px-3 py-2.5 rounded-xl text-sm font-medium text-zinc-500 transition-colors hover:bg-zinc-800/50 hover:text-red-400"
          >
            <svg className="h-4 w-4" fill="none" viewBox="0 0 24 24" stroke="currentColor" strokeWidth={1.5}>
              <path strokeLinecap="round" strokeLinejoin="round" d="M17 16l4-4m0 0l-4-4m4 4H7m6 4v1a3 3 0 01-3 3H6a3 3 0 01-3-3V7a3 3 0 013-3h4a3 3 0 013 3v1" />
            </svg>
            {dict.logout}
          </button>
          <div className="mt-4 flex flex-col items-center gap-3 border-t border-zinc-800 pt-4">
            <AdminLanguageSwitcher />
            <AdminThemeSwitcher />
          </div>
        </div>
      </aside>
      <main className="flex-1 overflow-y-auto bg-zinc-950 transition-colors">{children}</main>
    </div>
  )
}
