/**
 * Copyright (c) 2021 OpenLens Authors
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of
 * this software and associated documentation files (the "Software"), to deal in
 * the Software without restriction, including without limitation the rights to
 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
 * the Software, and to permit persons to whom the Software is furnished to do so,
 * subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
 * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

// Helper to convert memory from units Ki, Mi, Gi, Ti, Pi to bytes and vise versa

const base = 1024;
const suffixes = ["K", "M", "G", "T", "P", "E"]; // Equivalents: Ki, Mi, Gi, Ti, Pi, Ei

export function unitsToBytes(value: string) {
  if (!suffixes.some(suffix => value.includes(suffix))) {
    return parseFloat(value);
  }
 
  const suffix = value.replace(/[0-9]|i|\./g, "");
  const index = suffixes.indexOf(suffix);

  return parseInt(
    (parseFloat(value) * Math.pow(base, index + 1)).toFixed(1)
  );
}

export function bytesToUnits(bytes: number, precision = 1) {
  const sizes = ["B", ...suffixes];
  const index = Math.floor(Math.log(bytes) / Math.log(base));

  if (!bytes) {
    return "N/A";
  }

  if (index === 0) {
    return `${bytes}${sizes[index]}`;
  }

  return `${(bytes / (1024 ** index)).toFixed(precision)}${sizes[index]}i`;
}