import log from 'loglevel';
import { sanitizeFilename } from '../../utils';
import { inferTitle } from '../../infer';
import { DEFAULT_APP_NAME } from '../../constants';

function tryToInferName({ name, targetUrl }) {
  // .length also checks if its the commanderJS function or a string
  if (name && name.length > 0) {
    return Promise.resolve(name);
  }

  return inferTitle(targetUrl)
    .then((pageTitle) => pageTitle || DEFAULT_APP_NAME)
    .catch((error) => {
      log.warn(
        `Unable to automatically determine app name, falling back to '${DEFAULT_APP_NAME}'. Reason: ${error}`,
      );
      return DEFAULT_APP_NAME;
    });
}

export default function({ platform, name, targetUrl }) {
  return tryToInferName({ name, targetUrl }).then((result) =>
    sanitizeFilename(platform, result),
  );
}