import * as program from 'commander';
import { setConfig } from '../../utils/handler-set-config';
import i18n from '../../utils/i18n';
import logger from '../../utils/logger';
import { SetLanguageError } from '../../error/set-language-error';
import {CommandError} from '../../error/command-error';

const defaultLanguage = ['zh', 'en'];

program
  .name('s set language')
  .usage('[options] [name]')
  .helpOption('-h, --help', i18n.__('Display help for command'))
  .description(`${i18n.__('You can set language.')}

     ${i18n.__('Example')}:
        $ s set language zh
        $ s set language en`)
  .parse(process.argv);

(async () => {

  if (program.args.length === 0) {
    program.help();
  }
  
  if (program.args.length > 0) {
    const lang = program.args[0];
    if (defaultLanguage.indexOf(lang) === -1) {
      throw new SetLanguageError('Setup failed');
    } else {
      setConfig('locale', lang);
      logger.success('Setup succeeded');
    }
  }
  
})().catch((err) => {
  throw new CommandError(err.message);
});