// Copyright (c) 2017-2022 Cloudflare, Inc.
// Licensed under the Apache 2.0 license found in the LICENSE file or at:
//     https://opensource.org/licenses/Apache-2.0
//
// Copyright Joyent, Inc. and other Node contributors.
//
// 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.

import { EventEmitter } from 'node-internal:events';

import { Buffer } from 'node-internal:internal_buffer';

export function Stream(opts) {
  EventEmitter.call(this, opts || {});
}

Object.setPrototypeOf(Stream.prototype, EventEmitter.prototype);
Object.setPrototypeOf(Stream, EventEmitter);

Stream.prototype.pipe = function (dest, options) {
  const source = this; // eslint-disable-line @typescript-eslint/no-this-alias
  function ondata(chunk) {
    if (dest.writable && dest.write(chunk) === false && source.pause) {
      source.pause();
    }
  }
  source.on('data', ondata);
  function ondrain() {
    if (source.readable && source.resume) {
      source.resume();
    }
  }
  dest.on('drain', ondrain);

  // If the 'end' option is not supplied, dest.end() will be called when
  // source gets the 'end' or 'close' events.  Only dest.end() once.
  if (!dest._isStdio && (!options || options.end !== false)) {
    source.on('end', onend);
    source.on('close', onclose);
  }
  let didOnEnd = false;
  function onend() {
    if (didOnEnd) return;
    didOnEnd = true;
    dest.end();
  }
  function onclose() {
    if (didOnEnd) return;
    didOnEnd = true;
    if (typeof dest.destroy === 'function') dest.destroy();
  }

  // Don't leave dangling pipes when there are errors.
  function onerror(er) {
    cleanup();
    if (EventEmitter.listenerCount(this, 'error') === 0) {
      this.emit('error', er);
    }
  }
  source.prependListener('error', onerror);
  dest.prependListener('error', onerror);

  // Remove all the event listeners that were added.
  function cleanup() {
    source.removeListener('data', ondata);
    dest.removeListener('drain', ondrain);
    source.removeListener('end', onend);
    source.removeListener('close', onclose);
    source.removeListener('error', onerror);
    dest.removeListener('error', onerror);
    source.removeListener('end', cleanup);
    source.removeListener('close', cleanup);
    dest.removeListener('close', cleanup);
  }
  source.on('end', cleanup);
  source.on('close', cleanup);
  dest.on('close', cleanup);
  dest.emit('pipe', source);

  // Allow for unix-like usage: A.pipe(B).pipe(C)
  return dest;
};

// Backwards-compat with node 0.4.x
Stream.Stream = Stream;
Stream._isUint8Array = function isUint8Array(value) {
  return value instanceof Uint8Array;
};
Stream._isArrayBufferView = function isArrayBufferView(value) {
  return ArrayBuffer.isView(value);
};
Stream._uint8ArrayToBuffer = function _uint8ArrayToBuffer(chunk) {
  return Buffer.from(chunk.buffer, chunk.byteOffset, chunk.byteLength);
};