import { QueryClient, QueryClientProvider } from "@tanstack/react-query";
import {
  Outlet,
  Link,
  createRootRouteWithContext,
  useRouter,
  HeadContent,
  Scripts,
} from "@tanstack/react-router";
import { useEffect, type ReactNode } from "react";

import appCss from "../styles.css?url";
import { reportLovableError } from "../lib/lovable-error-reporting";
import { Toaster } from "@/components/ui/sonner";
import { ThemeProvider } from "@/lib/theme";
import { I18nProvider } from "@/lib/i18n";

function NotFoundComponent() {
  return (
    <div className="flex min-h-screen items-center justify-center bg-background px-4">
      <div className="max-w-md text-center">
        <h1 className="text-7xl font-bold text-foreground">404</h1>
        <h2 className="mt-4 text-xl font-semibold text-foreground">পেজ পাওয়া যায়নি</h2>
        <p className="mt-2 text-sm text-muted-foreground">এই ঠিকানাটি খুঁজে পাওয়া যায়নি।</p>
        <div className="mt-6">
          <Link
            to="/"
            className="inline-flex items-center justify-center rounded-md bg-primary px-4 py-2 text-sm font-medium text-primary-foreground transition-colors hover:bg-primary/90"
          >
            হোমে ফিরুন
          </Link>
        </div>
      </div>
    </div>
  );
}

function ErrorComponent({ error, reset }: { error: Error; reset: () => void }) {
  console.error(error);
  const router = useRouter();
  useEffect(() => {
    reportLovableError(error, { boundary: "tanstack_root_error_component" });
  }, [error]);
  return (
    <div className="flex min-h-screen items-center justify-center bg-background px-4">
      <div className="max-w-md text-center">
        <h1 className="text-xl font-semibold text-foreground">পেজ লোড হয়নি</h1>
        <p className="mt-2 text-sm text-muted-foreground">আবার চেষ্টা করুন।</p>
        <div className="mt-6 flex gap-2 justify-center">
          <button
            onClick={() => { router.invalidate(); reset(); }}
            className="rounded-md bg-primary px-4 py-2 text-sm font-medium text-primary-foreground hover:bg-primary/90"
          >আবার চেষ্টা</button>
          <a href="/" className="rounded-md border px-4 py-2 text-sm">হোম</a>
        </div>
      </div>
    </div>
  );
}

export const Route = createRootRouteWithContext<{ queryClient: QueryClient }>()({
  head: () => ({
    meta: [
      { charSet: "utf-8" },
      { name: "viewport", content: "width=device-width, initial-scale=1, maximum-scale=1" },
      { name: "theme-color", content: "#0f9d72" },
      { title: "Helpgate Inventory — বাংলাদেশের জন্য পূর্ণাঙ্গ POS ও ইনভেন্টরি" },
      { name: "description", content: "ইলেকট্রনিক্স, মোবাইল, ফ্যাশন, গ্রোসারি সহ সকল ব্যবসার জন্য আধুনিক ইনভেন্টরি, POS, ইনভয়েস ও অ্যাকাউন্টিং সফটওয়্যার।" },
      { property: "og:title", content: "Helpgate Inventory" },
      { property: "og:description", content: "Modern Inventory & POS for Bangladesh" },
      { property: "og:type", content: "website" },
    ],
    links: [
      { rel: "stylesheet", href: appCss },
      { rel: "preconnect", href: "https://fonts.googleapis.com" },
      { rel: "preconnect", href: "https://fonts.gstatic.com", crossOrigin: "anonymous" },
      { rel: "stylesheet", href: "https://fonts.googleapis.com/css2?family=Hind+Siliguri:wght@300;400;500;600;700&family=Inter:wght@400;500;600;700;800&display=swap" },
      { rel: "manifest", href: "/manifest.webmanifest" },
      { rel: "apple-touch-icon", href: "/icon-192.png" },
    ],
  }),
  shellComponent: RootShell,
  component: RootComponent,
  notFoundComponent: NotFoundComponent,
  errorComponent: ErrorComponent,
});

function RootShell({ children }: { children: ReactNode }) {
  return (
    <html lang="bn">
      <head><HeadContent /></head>
      <body>
        {children}
        <Scripts />
      </body>
    </html>
  );
}

function RootComponent() {
  const { queryClient } = Route.useRouteContext();
  return (
    <QueryClientProvider client={queryClient}>
      <ThemeProvider>
        <I18nProvider>
          <Outlet />
          <Toaster richColors position="top-center" />
        </I18nProvider>
      </ThemeProvider>
    </QueryClientProvider>
  );
}
