import chalk from 'chalk';
import * as request from 'request';
import * as semver from 'semver';
import * as pkg from '../../package.json';

const pkgConfig: any = pkg;

export default async function checkVersion() {
  /**
   * 检测当前node版本是否符合要求
   */
  if (!semver.satisfies(process.version, pkgConfig.engines.node)) {
    return console.log(
      chalk.red(
        '  You must upgrade node to >=' +
          pkgConfig.engines.node +
          '.x to use jgb-cli'
      )
    );
  }
  return new Promise(resolve => {
    request(
      {
        url: 'https://registry.npmjs.org/jgb-cli',
        timeout: 1000
      },
      (err, res, body) => {
        if (!err && res.statusCode === 200) {
          const latestVersion = JSON.parse(body)['dist-tags'].latest;
          const localVersion = pkgConfig.version;
          if (semver.lt(localVersion, latestVersion)) {
            console.log(
              chalk.yellow('  A newer version of jgb-cli is available.')
            );
            console.log();
            console.log('  latest:    ' + chalk.green(latestVersion));
            console.log('  installed: ' + chalk.red(localVersion));
            console.log();
          }
        }
        resolve();
      }
    );
  });
}