import en_US from './en_US';
import zh_CN from './zh_CN';
import fr_FR from './fr_FR';
import pl_PL from './pl_PL';
import de_DE from './de_DE';

interface Config {
  [propName: string]: Props
}

interface LanguageConfig {
  name: string
  content: Props
}

class Language {
  config: Config;
  language: string | LanguageConfig;
  name: string;
  constructor(language?: string | LanguageConfig) {
    this.config = {
      en_US,
      zh_CN,
      fr_FR,
      pl_PL,
      de_DE
    };
    this.init(language);
  }

  changeLanguage(name: string) {
    this.name = name;
  }

  init(language: string | LanguageConfig) {
    if (
      typeof language === 'undefined' ||
      typeof language === 'string'
    ) {
      this.changeLanguage(language || 'en_US');
    } else {
      const { name, content } = language;
      content && this.registry(name, content);
      name && this.changeLanguage(name);
    }
  }

  registry(name: string, content: Props) {
    this.config = {
      ...this.config,
      [name]: content
    }
  }

  useLanguage(name: string) {
    return this.config[this.name][name];
  }
}

export default Language;