biblical-guide.com/components/auth/protected-route.tsx

'use client'

import { ReactNode, useEffect } from 'react'
import { useRouter } from 'next/navigation'
import { useLocale } from 'next-intl'
import { useAuth } from './auth-provider'
import { Box, CircularProgress, Typography } from '@mui/material'

interface ProtectedRouteProps {
  children: ReactNode
  fallback?: ReactNode
}

export function ProtectedRoute({ children, fallback }: ProtectedRouteProps) {
  const { isAuthenticated, isLoading } = useAuth()
  const router = useRouter()
  const locale = useLocale()

  useEffect(() => {
    if (!isLoading && !isAuthenticated) {
      router.push(`/${locale}/login`)
    }
  }, [isAuthenticated, isLoading, router, locale])

  if (isLoading) {
    return fallback || (
      <Box
        display="flex"
        flexDirection="column"
        alignItems="center"
        justifyContent="center"
        minHeight="60vh"
        gap={2}
      >
        <CircularProgress />
        <Typography variant="body2" color="text.secondary">
          Loading...
        </Typography>
      </Box>
    )
  }

  if (!isAuthenticated) {
    return null
  }

  return <>{children}</>
}