/* eslint-disable node/no-deprecated-api */

'use strict';

var buffer = require('buffer');
var Buffer = buffer.Buffer;

var safer = {};

var key;

for (key in buffer) {
  if (!buffer.hasOwnProperty(key)) continue;
  if (key === 'SlowBuffer' || key === 'Buffer') continue;
  safer[key] = buffer[key];
}

var Safer = (safer.Buffer = {});
for (key in Buffer) {
  if (!Buffer.hasOwnProperty(key)) continue;
  if (key === 'allocUnsafe' || key === 'allocUnsafeSlow') continue;
  Safer[key] = Buffer[key];
}

safer.Buffer.prototype = Buffer.prototype;

if (!Safer.from || Safer.from === Uint8Array.from) {
  Safer.from = function (value, encodingOrOffset, length) {
    if (typeof value === 'number') {
      throw new TypeError(
        'The "value" argument must not be of type number. Received type ' +
          typeof value
      );
    }
    if (value && typeof value.length === 'undefined') {
      throw new TypeError(
        'The first argument must be one of type string, Buffer, ArrayBuffer, Array, or Array-like Object. Received type ' +
          typeof value
      );
    }
    return Buffer(value, encodingOrOffset, length);
  };
}

if (!Safer.alloc) {
  Safer.alloc = function (size, fill, encoding) {
    if (typeof size !== 'number') {
      throw new TypeError(
        'The "size" argument must be of type number. Received type ' +
          typeof size
      );
    }
    if (size < 0 || size >= 2 * (1 << 30)) {
      throw new RangeError(
        'The value "' + size + '" is invalid for option "size"'
      );
    }
    var buf = Buffer(size);
    if (!fill || fill.length === 0) {
      buf.fill(0);
    } else if (typeof encoding === 'string') {
      buf.fill(fill, encoding);
    } else {
      buf.fill(fill);
    }
    return buf;
  };
}

if (!safer.kStringMaxLength) {
  try {
    safer.kStringMaxLength = process.binding('buffer').kStringMaxLength;
  } catch (e) {
    // we can't determine kStringMaxLength in environments where process.binding
    // is unsupported, so let's not set it
  }
}

if (!safer.constants) {
  safer.constants = {
    MAX_LENGTH: safer.kMaxLength,
  };
  if (safer.kStringMaxLength) {
    safer.constants.MAX_STRING_LENGTH = safer.kStringMaxLength;
  }
}

module.exports = safer;