manoon-headless/src/app/[locale]/layout.tsx

import { Metadata } from "next";
import { NextIntlClientProvider } from "next-intl";
import { getMessages, setRequestLocale } from "next-intl/server";
import { SUPPORTED_LOCALES, DEFAULT_LOCALE, isValidLocale } from "@/lib/i18n/locales";

const baseUrl = process.env.NEXT_PUBLIC_SITE_URL || "https://dev.manoonoils.com";

export function generateStaticParams() {
  return SUPPORTED_LOCALES.map((locale) => ({ locale }));
}

export async function generateMetadata({
  params,
}: {
  params: Promise<{ locale: string }>;
}): Promise<Metadata> {
  const { locale } = await params;
  const validLocale = isValidLocale(locale) ? locale : DEFAULT_LOCALE;
  const localePrefix = validLocale === DEFAULT_LOCALE ? "" : `/${validLocale}`;

  const languages: Record<string, string> = {};
  for (const loc of SUPPORTED_LOCALES) {
    const prefix = loc === DEFAULT_LOCALE ? "" : `/${loc}`;
    languages[loc] = `${baseUrl}${prefix}`;
  }

  return {
    alternates: {
      canonical: `${baseUrl}${localePrefix}`,
      languages,
    },
  };
}

export default async function LocaleLayout({
  children,
  params,
}: {
  children: React.ReactNode;
  params: Promise<{ locale: string }>;
}) {
  const { locale } = await params;
  setRequestLocale(locale);
  const messages = await getMessages();

  return (
    <NextIntlClientProvider messages={messages}>
      {children}
    </NextIntlClientProvider>
  );
}