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// Copyright (c) 2017-2022 Cloudflare, Inc.
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// Licensed under the Apache 2.0 license found in the LICENSE file or at:
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//     https://opensource.org/licenses/Apache-2.0
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//
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// Copyright Joyent, Inc. and other Node contributors.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a
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// copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to permit
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// persons to whom the Software is furnished to do so, subject to the
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// following conditions:
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//
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// The above copyright notice and this permission notice shall be included
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// in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
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// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
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// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
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// USE OR OTHER DEALINGS IN THE SOFTWARE.
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import { EventEmitter } from 'node-internal:events';
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import { Buffer } from 'node-internal:internal_buffer';
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export function Stream(opts) {
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  EventEmitter.call(this, opts || {});
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}
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Object.setPrototypeOf(Stream.prototype, EventEmitter.prototype);
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Object.setPrototypeOf(Stream, EventEmitter);
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Stream.prototype.pipe = function (dest, options) {
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  const source = this; // eslint-disable-line @typescript-eslint/no-this-alias
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  function ondata(chunk) {
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    if (dest.writable && dest.write(chunk) === false && source.pause) {
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      source.pause();
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    }
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  }
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  source.on('data', ondata);
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  function ondrain() {
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    if (source.readable && source.resume) {
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      source.resume();
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    }
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  }
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  dest.on('drain', ondrain);
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  // If the 'end' option is not supplied, dest.end() will be called when
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  // source gets the 'end' or 'close' events.  Only dest.end() once.
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  if (!dest._isStdio && (!options || options.end !== false)) {
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    source.on('end', onend);
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    source.on('close', onclose);
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  }
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  let didOnEnd = false;
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  function onend() {
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    if (didOnEnd) return;
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    didOnEnd = true;
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    dest.end();
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  }
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  function onclose() {
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    if (didOnEnd) return;
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    didOnEnd = true;
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    if (typeof dest.destroy === 'function') dest.destroy();
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  }
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  // Don't leave dangling pipes when there are errors.
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  function onerror(er) {
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    cleanup();
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    if (EventEmitter.listenerCount(this, 'error') === 0) {
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      this.emit('error', er);
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    }
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  }
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  source.prependListener('error', onerror);
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  dest.prependListener('error', onerror);
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  // Remove all the event listeners that were added.
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  function cleanup() {
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    source.removeListener('data', ondata);
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    dest.removeListener('drain', ondrain);
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    source.removeListener('end', onend);
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    source.removeListener('close', onclose);
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    source.removeListener('error', onerror);
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    dest.removeListener('error', onerror);
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    source.removeListener('end', cleanup);
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    source.removeListener('close', cleanup);
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    dest.removeListener('close', cleanup);
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  }
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  source.on('end', cleanup);
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  source.on('close', cleanup);
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  dest.on('close', cleanup);
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  dest.emit('pipe', source);
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  // Allow for unix-like usage: A.pipe(B).pipe(C)
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  return dest;
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};
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// Backwards-compat with node 0.4.x
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Stream.Stream = Stream;
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Stream._isUint8Array = function isUint8Array(value) {
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  return value instanceof Uint8Array;
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};
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Stream._isArrayBufferView = function isArrayBufferView(value) {
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  return ArrayBuffer.isView(value);
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};
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Stream._uint8ArrayToBuffer = function _uint8ArrayToBuffer(chunk) {
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  return Buffer.from(chunk.buffer, chunk.byteOffset, chunk.byteLength);
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};