export const DEFAULT_LOCALE = 'tr'

export const SUPPORTED_LOCALES = ['tr', 'en', 'de', 'it', 'es', 'ru', 'ar']

export const UI_LANGUAGE_OPTIONS = [
  { label: 'Türkçe', value: 'tr', short: 'TUR', flag: '🇹🇷' },
  { label: 'English', value: 'en', short: 'ENG', flag: '🇬🇧' },
  { label: 'Deutsch', value: 'de', short: 'DEU', flag: '🇩🇪' },
  { label: 'Italiano', value: 'it', short: 'ITA', flag: '🇮🇹' },
  { label: 'Español', value: 'es', short: 'ESP', flag: '🇪🇸' },
  { label: 'Русский', value: 'ru', short: 'RUS', flag: '🇷🇺' },
  { label: 'العربية', value: 'ar', short: 'ARA', flag: '🇸🇦' }
]

export const BACKEND_LANG_MAP = {
  tr: 'TR',
  en: 'EN',
  de: 'DE',
  it: 'IT',
  es: 'ES',
  ru: 'RU',
  ar: 'AR'
}

export function normalizeLocale(value) {
  const locale = String(value || '').trim().toLowerCase()
  return SUPPORTED_LOCALES.includes(locale) ? locale : DEFAULT_LOCALE
}

export function toBackendLangCode(locale) {
  return BACKEND_LANG_MAP[normalizeLocale(locale)] || BACKEND_LANG_MAP[DEFAULT_LOCALE]
}