import { Link, useRouterState } from '@tanstack/react-router'
import { cn } from '@/lib/utils'

const NAV_ITEMS = [
  { to: '/', label: 'Home', icon: 'home', matchPrefix: '/', exact: true },
  { to: '/toeic', label: 'Luyện đề', icon: 'assignment', matchPrefix: '/toeic', exact: false },
  { to: '/writing', label: 'Writing', icon: 'edit_note', matchPrefix: '/writing', exact: false },
  { to: '/vocab', label: 'Từ vựng', icon: 'menu_book', matchPrefix: '/vocab', exact: false },
]

function isActive(pathname: string, prefix: string, exact: boolean) {
  return exact ? pathname === prefix : pathname.startsWith(prefix)
}

export function MobileNav() {
  const { location } = useRouterState()
  const pathname = location.pathname

  return (
    <nav className="fixed bottom-0 inset-x-0 lg:hidden bg-white border-t border-slate-200 z-50 flex safe-area-inset-bottom">
      {NAV_ITEMS.map((item) => {
        const active = isActive(pathname, item.matchPrefix, item.exact)
        return (
          <Link
            key={item.to}
            to={item.to}
            className={cn(
              'flex-1 flex flex-col items-center justify-center gap-0.5 py-2 min-h-[56px] text-[11px] font-medium transition-colors',
              active ? 'text-blue-600' : 'text-slate-400',
            )}
          >
            <span className="material-symbols-outlined" style={{ fontSize: 22 }}>
              {item.icon}
            </span>
            {item.label}
          </Link>
        )
      })}
    </nav>
  )
}
