#!/usr/bin/env node

'use strict';

const semver = require('semver');
const {execRead, logPromise} = require('../utils');

const run = async ({cwd, packages}, versionsMap) => {
  const branch = await execRead('git branch | grep \\* | cut -d " " -f2', {
    cwd,
  });

  for (let i = 0; i < packages.length; i++) {
    const packageName = packages[i];

    try {
      // In case local package JSONs are outdated,
      // guess the next version based on the latest NPM release.
      const version = await execRead(`npm show ${packageName} version`);
      const {major, minor, patch} = semver(version);

      // Guess the next version by incrementing patch.
      // The script will confirm this later.
      // By default, new releases from masters should increment the minor version number,
      // and patch releases should be done from branches.
      if (branch === 'master') {
        versionsMap.set(packageName, `${major}.${minor + 1}.0`);
      } else {
        versionsMap.set(packageName, `${major}.${minor}.${patch + 1}`);
      }
    } catch (error) {
      // If the package has not yet been published,
      // we'll require a version number to be entered later.
      versionsMap.set(packageName, null);
    }
  }
};

module.exports = async (params, versionsMap) => {
  return logPromise(
    run(params, versionsMap),
    'Guessing stable version numbers'
  );
};