/* eslint no-console: 0 */
const zeroPad = (str, len) => {
  let output = `${str}`;
  if (!len || len <= output.length) return str;

  while (output.length < len) {
    output = `0${output}`;
  }
  return output;
};

const getTimestamp = () => {
  const d = new Date();
  return `${[d.getFullYear(), zeroPad(d.getMonth(), 2), zeroPad(d.getDate(), 2)].join('/')} ${[
    zeroPad(d.getHours(), 2),
    zeroPad(d.getMinutes(), 2),
    zeroPad(d.getSeconds(), 2),
  ].join(':')}`;
};

const wrapMessage = msg => `[${getTimestamp()}]: ${msg.join(' ')}`;

const logger = {
  log(...args) {
    console.log(wrapMessage(args));
  },
  warn(...args) {
    console.warn(wrapMessage(args));
  },
  error(...args) {
    if (args[0] instanceof Error) {
      console.error(getTimestamp(), args[0].stack);
      return;
    }
    console.error(wrapMessage(args));
  },
  debug(...args) {
    if (!process.env.DEBUG) return;
    console.log(wrapMessage(args));
  },
};

export default logger;