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 { AuthProvider } from './auth/auth-context';
import { ToastProvider } from './components/Toast';
import './i18n';
import { ApiError } from './lib/api';
import { initUserTheme } from './theme/apply-theme';
import { applyTheme, initSystemThemeListener, readStoredThemeMode } from './theme/theme';
import './styles/tokens.css';
import './styles/base.css';
import './styles/print.css';

// theme-init.js already themed the document pre-paint; re-applying here is
// a no-op safety net for contexts serving index.html without it, and the
// listener keeps 'system' users in sync with live OS scheme changes.
applyTheme(readStoredThemeMode());
initSystemThemeListener();
// Accent choice (#184): re-derive from the stored choice — heals a stale
// ui.theme.css cache after app updates; theme-init.js only bridges paint.
initUserTheme();

const queryClient = new QueryClient({
  defaultOptions: {
    queries: {
      // A 4xx won't turn into something else on retry (wrong permissions,
      // page in trash, not found, …) — only retry on network/5xx errors.
      retry: (failureCount, error) => {
        if (error instanceof ApiError && error.status >= 400 && error.status < 500) return false;
        return failureCount < 3;
      },
    },
  },
});

const container = document.getElementById('root');
if (!container) {
  throw new Error('index.html is missing the #root element');
}

createRoot(container).render(
  <StrictMode>
    <QueryClientProvider client={queryClient}>
      <AuthProvider>
        <ToastProvider>
          <BrowserRouter>
            <App />
          </BrowserRouter>
        </ToastProvider>
      </AuthProvider>
    </QueryClientProvider>
  </StrictMode>,
);