interface LangPair {
  zh: string
  en: string
  ru: string
}

export const langHelper = {
  parseLangString(str: string): LangPair {
    if (!str.includes('~~')) return { zh: str, en: str, ru: str }
    const [zhPart, enPart, ruPart] = str.split('~~')
    return {
      zh: zhPart.replace('zh-CN**', ''),
      en: enPart?.replace('en**', '') || zhPart.replace('zh-CN**', ''),
      ru: ruPart?ruPart.replace('ru**', ''):zhPart.replace('zh-CN**', '')
    }
  },

  getDisplayText(str: string, currentLang: string): string {
    const { zh, en,ru } = this.parseLangString(str)
    if (currentLang==='zh-CN'){
        return zh;
    } else if (currentLang==='en'){
      return en;
    } else if (currentLang==='ru'){
      return ru;
    }
    // return currentLang === 'zh-CN' ? zh : (en || zh)
  },

  transformObject<T extends Record<string, any>>(obj: T, currentLang: string): T {
    if (typeof obj === 'number') { return obj }
    if (typeof obj === 'string') {
      return this.getDisplayText(obj, currentLang)
    }
    const result = { ...obj }
    for (const key in result) {
      if(Array.isArray(result[key])) {
        result[key] = this.transformArray(result[key], currentLang)
      } else if (typeof result[key] === 'string') {
        result[key] = this.getDisplayText(result[key], currentLang)
      } else if (typeof result[key] === 'object' && result[key] !== null) {
        result[key] = this.transformObject(result[key], currentLang)
      }
    }
    return result
  },

  transformArray<T extends Record<string, any>>(arr: T[], currentLang: string): T[] {
    return arr.map(item => this.transformObject(item, currentLang))
  }
}