import type { Lang } from '@/composables/engine.d'

export type i18nMap = {
  [key: string]: {
    en: string,
    de: string,
  },
}

const browserLang = navigator.language ? navigator.language.substring(0, 2) : 'en'
const defaultLang: Lang = browserLang === 'de' ? 'de' : 'en'
let lang: Lang = defaultLang

export interface useI18n {
  setLang(lang: Lang): void
  getLang(): Lang
  $t(key: string): string
}

export default (map: i18nMap): useI18n => {
  return {
    setLang: (_lang: Lang): void => {
      lang = _lang
    },
    getLang: (): Lang => {
      return lang
    },
    $t: (key: string): string => {
      const t = map[key]
      if (!t) {
        return key
      }

      return t[lang] || t[defaultLang] || key
    }
  }
}