/*
This file is part of the Notesnook project (https://notesnook.com/)

Copyright (C) 2023 Streetwriters (Private) Limited

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU 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 General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

export function formatBytes(bytes: number, decimals = 2) {
  if (bytes === 0) return "0 Bytes";

  const k = 1024;
  const dm = decimals < 0 ? 0 : decimals;
  const sizes = ["B", "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(dm)) + " " + sizes[i];
}

/*jshint node:true*/

/**
 * Replaces characters in strings that are illegal/unsafe for filenames.
 * Unsafe characters are either removed or replaced by a substitute set
 * in the optional `options` object.
 *
 * Illegal Characters on Various Operating Systems
 * / ? < > \ : * | "
 * https://kb.acronis.com/content/39790
 *
 * Unicode Control codes
 * C0 0x00-0x1f & C1 (0x80-0x9f)
 * http://en.wikipedia.org/wiki/C0_and_C1_control_codes
 *
 * Reserved filenames on Unix-based systems (".", "..")
 * Reserved filenames in Windows ("CON", "PRN", "AUX", "NUL", "COM1",
 * "COM2", "COM3", "COM4", "COM5", "COM6", "COM7", "COM8", "COM9",
 * "LPT1", "LPT2", "LPT3", "LPT4", "LPT5", "LPT6", "LPT7", "LPT8", and
 * "LPT9") case-insesitively and with or without filename extensions.
 *
 * Capped at 255 characters in length.
 * http://unix.stackexchange.com/questions/32795/what-is-the-maximum-allowed-filename-and-folder-size-with-ecryptfs
 *
 * @param  {String} input   Original filename
 * @param  {Object} options {replacement: String | Function }
 * @return {String}         Sanitized filename
 */

const illegalRe = /[/?<>\\:*|"]/g;
//var controlRe = /[x00-x1f\x80-\x9f]/g;
const reservedRe = /^\.+$/;
const windowsReservedRe = /^(con|prn|aux|nul|com[0-9]|lpt[0-9])(\..*)?$/i;
const windowsTrailingRe = /[. ]+$/;
const whitespace = /\s+/g;

function sanitize(input: string, replacement: string) {
  if (typeof input !== "string") {
    throw new Error("Input must be string");
  }
  const sanitized = input
    .replace(whitespace, replacement)
    .replace(illegalRe, replacement)
    .replace(reservedRe, replacement)
    .replace(windowsReservedRe, replacement)
    .replace(windowsTrailingRe, replacement);

  return sanitized.slice(0, 254);
}

export function sanitizeFilename(
  input: string,
  options?: { replacement: string }
) {
  const replacement = (options && options.replacement) || "";
  return sanitize(input, replacement);
}
