import createMiddleware from "next-intl/middleware";
import { NextRequest, NextResponse } from "next/server";
import { locales } from "@/config";

export default async function middleware(request: NextRequest) {
  const { pathname } = request.nextUrl;
  const defaultLocale = "in";

  // Check if the pathname already has a locale
  const pathnameHasLocale = locales.some(
    (locale) => pathname.startsWith(`/${locale}/`) || pathname === `/${locale}`
  );

  // If pathname doesn't have a locale, redirect to default locale
  if (!pathnameHasLocale) {
    // Skip redirect for API routes, static files, and Next.js internals
    if (
      pathname.startsWith('/api/') ||
      pathname.startsWith('/_next/') ||
      pathname.startsWith('/favicon') ||
      pathname.includes('.') ||
      pathname.startsWith('/public/')
    ) {
      return NextResponse.next();
    }

    // Redirect to default locale
    const newUrl = new URL(`/${defaultLocale}${pathname}`, request.url);
    return NextResponse.redirect(newUrl);
  }

  // Use next-intl middleware for internationalized routes
  const handleI18nRouting = createMiddleware({
    locales: locales,
    defaultLocale: defaultLocale,
  });

  return handleI18nRouting(request);
}

export const config = {
  // Match all pathnames except for
  // - API routes
  // - _next (Next.js internals)
  // - _static (inside /public)
  // - all root files inside /public (e.g. favicon.ico)
  matcher: ['/((?!api|_next|_static|.*\\..*).*)']
};