import { QueryClient, QueryClientProvider } from '@tanstack/react-query'
import { StrictMode } from 'react'
import { createRoot } from 'react-dom/client'
import { BrowserRouter } from 'react-router-dom'
import { App } from '@/App'
import { ConfirmDialog, Toaster } from '@/components/ui/toast'
import './index.css'

const queryClient = new QueryClient({
  defaultOptions: {
    queries: {
      // Till data changes constantly, but refetching on every window focus
      // makes the screen flicker mid-transaction.
      refetchOnWindowFocus: false,
      staleTime: 30_000,
      retry: 1,
    },
  },
})

/*
 * The till has to survive a refresh during an outage, so the built app shell is
 * kept by a service worker. Registered after load so it never competes with the
 * first paint, and only where the browser supports it — a till on an old kiosk
 * browser simply loses the reload-while-offline case, not the app.
 */
if ('serviceWorker' in navigator && import.meta.env.PROD) {
  window.addEventListener('load', () => {
    void navigator.serviceWorker.register('/sw.js').catch(() => {
      // Registration is refused over plain HTTP on a non-localhost origin. That
      // is a deployment choice, not an error worth putting on the screen.
    })
  })
}

createRoot(document.getElementById('root')!).render(
  <StrictMode>
    <QueryClientProvider client={queryClient}>
      <BrowserRouter>
        <App />
        <Toaster />
        <ConfirmDialog />
      </BrowserRouter>
    </QueryClientProvider>
  </StrictMode>,
)