import { Navigate, useLocation } from 'react-router-dom'
import { useAuthStore } from '@/store/authStore'
import { usePermissions, type EffectiveRole } from '@/hooks/usePermissions'

interface ProtectedRouteProps {
  requiredRole?: EffectiveRole
  children: React.ReactNode
}

export function ProtectedRoute({ requiredRole, children }: ProtectedRouteProps) {
  const { isAuthenticated, isLoading } = useAuthStore()
  const location = useLocation()
  const { effectiveRole } = usePermissions()

  if (isLoading) {
    return (
      <div className="flex h-screen items-center justify-center">
        <div className="h-8 w-8 animate-spin rounded-full border-4 border-white/20 border-t-white" />
      </div>
    )
  }

  if (!isAuthenticated) {
    return <Navigate to="/login" state={{ from: location }} replace />
  }

  if (requiredRole) {
    const ROLE_HIERARCHY: Record<EffectiveRole, number> = {
      super_admin: 4,
      owner: 3,
      engineer: 2,
      viewer: 1,
    }
    if (ROLE_HIERARCHY[effectiveRole] < ROLE_HIERARCHY[requiredRole]) {
      return <Navigate to="/trees" replace />
    }
  }

  return <>{children}</>
}

export default ProtectedRoute
