import { StrictMode } from 'react';
import { createRoot } from 'react-dom/client';
import { RouterProvider } from '@tanstack/react-router';
import { QueryClient, QueryClientProvider } from '@tanstack/react-query';
import './index.css';
import './i18n/config';
import { AuthProvider } from '@/features/auth/context/AuthProvider';
import { useAuth } from '@/features/auth/context/auth-context';
import { Toaster } from '@/components/ui/sonner';
import { router } from '@/router';
import { getAppConfig } from '@/lib/config';
import { initSentry } from '@/lib/sentry';
import { SentryErrorBoundary } from '@/components/SentryErrorBoundary';
import { UmamiAnalytics } from '@/components/UmamiAnalytics';

// First, before the query client and before render, so an error during startup is still captured.
// A no-op when no DSN is configured.
initSentry();

document.title = getAppConfig().appTitle;

const queryClient = new QueryClient({
    defaultOptions: {
        queries: { retry: 1, refetchOnWindowFocus: true },
    },
});

function BootstrapSplash() {
    return (
        <div className="flex min-h-svh items-center justify-center text-muted-foreground">
            <span className="h-6 w-6 animate-spin rounded-full border-2 border-primary border-t-transparent" />
        </div>
    );
}

/**
 * Renders the router only once the initial silent refresh has settled, so the
 * route guards see a definitive auth state rather than the transient loading one.
 */
function InnerApp() {
    const auth = useAuth();
    if (auth.status === 'loading') {
        return <BootstrapSplash />;
    }
    return <RouterProvider router={router} context={{ auth }} />;
}

async function enableMocking(): Promise<void> {
    if (import.meta.env.VITE_ENABLE_MSW !== 'true') {
        return;
    }
    const { worker } = await import('@/mocks/browser');
    await worker.start({ onUnhandledRequest: 'bypass' });
}

void enableMocking().then(() => {
    const rootElement = document.getElementById('root');
    if (rootElement === null) {
        throw new Error('Root element #root not found');
    }
    createRoot(rootElement).render(
        <StrictMode>
            <QueryClientProvider client={queryClient}>
                <AuthProvider>
                    {/*
                     * Inside AuthProvider, not outermost: the fallback has to be reachable for a
                     * logged-in user, and a render error inside a page must not tear down the
                     * session context — otherwise recovering would also log the user out.
                     */}
                    <SentryErrorBoundary>
                        <InnerApp />
                        <UmamiAnalytics />
                    </SentryErrorBoundary>
                    <Toaster />
                </AuthProvider>
            </QueryClientProvider>
        </StrictMode>,
    );
});