infoalloggi-monorepo/apps/infoalloggi/src/providers/I18nProvider.tsx

import {
	createContext,
	type FC,
	type ReactNode,
	useContext,
	useMemo,
} from "react";
import { en } from "~/i18n/en";
import { it } from "~/i18n/it";
import type { LangDict, Locales } from "~/i18n/locales";

type I18nContextType = {
	locale: Locales;
};

const I18nContext = createContext<I18nContextType>({
	locale: "it",
});

export const I18nProvider: FC<{
	children: ReactNode;
	locale: string | undefined;
}> = ({ children, locale }) => {
	return (
		<I18nContext.Provider value={{ locale: validateLocale(locale) }}>
			{children}
		</I18nContext.Provider>
	);
};

export const useTranslation = () => {
	const { locale } = useContext(I18nContext);
	return useMemo(() => {
		return (
			locale === "en" ? { locale: "en", t: en } : { locale: "it", t: it }
		) as {
			locale: Locales;
			t: LangDict;
		};
	}, [locale]);
};
const validateLocale = (locale: string | undefined): Locales => {
	if (locale === "en") return "en";
	return "it";
};