import type { NuxtI18nOptions } from '@nuxtjs/i18n';
import { SUPPORTED_LOCALES } from '../app/constants';
import { createProjectKey } from "../app/utils/transliterator";

export function createI18nConfig(defaultLocaleCode?: string, projectName: string): NuxtI18nOptions {
	const defaultLocale = defaultLocaleCode && SUPPORTED_LOCALES.some(l => l.code === defaultLocaleCode)
			? defaultLocaleCode
			: 'en-gb';

	const cookieKey = `${createProjectKey(projectName)}-locale`;

	return {
		defaultLocale,
		locales: SUPPORTED_LOCALES.map((locale) => ({
			code: locale.code,
			file: locale.file,
		})),
		lazy: true,
		strategy: 'prefix',
		detectBrowserLanguage: {
			alwaysRedirect: true,
			redirectOn: 'root',
			fallbackLocale: defaultLocale,
			cookieKey,
		},
	};
}