// SPDX-License-Identifier: MIT OR Apache-2.0
// Copyright (c) 2025 Pierre Fitness Intelligence
// ABOUTME: Language switcher hook for managing language changes
// ABOUTME: Provides language persistence across app sessions
import { useEffect, useCallback } from 'react';
import { useTranslation } from './types';
import type { SupportedLanguage } from './config';
export interface LanguageSwitcherOptions {
storageKey?: string;
onLanguageChange?: (language: SupportedLanguage) => void;
}
/**
* Hook for managing language switching with persistence
* @param options Configuration options for the language switcher
*/
export function useLanguageSwitcher(options: LanguageSwitcherOptions = {}) {
const { storageKey = 'pierre_app_language', onLanguageChange } = options;
const { i18n, language } = useTranslation();
// Load saved language on mount
useEffect(() => {
const savedLanguage = localStorage.getItem(storageKey);
if (savedLanguage && savedLanguage !== language) {
i18n.changeLanguage(savedLanguage);
}
}, [storageKey, i18n, language]);
// Change language and persist
const changeLanguage = useCallback(
(newLanguage: SupportedLanguage) => {
i18n.changeLanguage(newLanguage);
localStorage.setItem(storageKey, newLanguage);
onLanguageChange?.(newLanguage);
},
[i18n, storageKey, onLanguageChange]
);
return {
currentLanguage: language as SupportedLanguage,
changeLanguage,
};
}
