/*
 * SonarQube
 * Copyright (C) 2009-2020 SonarSource SA
 * mailto:info AT sonarsource DOT com
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 3 of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */
/* eslint-disable no-console*/
const chalk = require('chalk');
const sortBy = require('lodash/sortBy');

function formatSize(bytes) {
  if (bytes === 0) {
    return '0';
  }
  const k = 1000; // or 1024 for binary
  const sizes = ['Bytes', 'KB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB'];
  const i = Math.floor(Math.log(bytes) / Math.log(k));
  return parseFloat((bytes / Math.pow(k, i)).toFixed(0)) + ' ' + sizes[i];
}

module.exports = (stats, bundleName = '', filesLimit = 10) => {
  if (stats.compilation.errors && stats.compilation.errors.length) {
    console.log(chalk.red.bold('Failed to create a production build!'));
    stats.compilation.errors.forEach(err => console.log(chalk.red(err.message || err)));
    process.exit(1);
  }
  const jsonStats = stats.toJson();
  const onlyJS = jsonStats.assets.filter(asset => asset.name.endsWith('.js'));
  console.log(`Biggest js chunks (${onlyJS.length} total) ${bundleName && `[${bundleName}]`}:`);
  sortBy(onlyJS, asset => -asset.size)
    .slice(0, filesLimit)
    .forEach(asset => {
      let sizeLabel = formatSize(asset.size);
      const leftPadding = ' '.repeat(Math.max(0, 8 - sizeLabel.length));
      sizeLabel = leftPadding + sizeLabel;
      console.log('', chalk.yellow(sizeLabel), asset.name);
    });
  console.log();
  const seconds = jsonStats.time / 1000;
  console.log('Duration: ' + seconds.toFixed(2) + 's');
  console.log();
};