'use strict';

var errors = require('../../../errors.js');

var endOfStream;
var hasRequiredEndOfStream;

function requireEndOfStream () {
	if (hasRequiredEndOfStream) return endOfStream;
	hasRequiredEndOfStream = 1;

	var ERR_STREAM_PREMATURE_CLOSE = errors.__require().codes.ERR_STREAM_PREMATURE_CLOSE;
	function once(callback) {
	  var called = false;
	  return function () {
	    if (called) return;
	    called = true;
	    for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {
	      args[_key] = arguments[_key];
	    }
	    callback.apply(this, args);
	  };
	}
	function noop() {}
	function isRequest(stream) {
	  return stream.setHeader && typeof stream.abort === 'function';
	}
	function eos(stream, opts, callback) {
	  if (typeof opts === 'function') return eos(stream, null, opts);
	  if (!opts) opts = {};
	  callback = once(callback || noop);
	  var readable = opts.readable || opts.readable !== false && stream.readable;
	  var writable = opts.writable || opts.writable !== false && stream.writable;
	  var onlegacyfinish = function onlegacyfinish() {
	    if (!stream.writable) onfinish();
	  };
	  var writableEnded = stream._writableState && stream._writableState.finished;
	  var onfinish = function onfinish() {
	    writable = false;
	    writableEnded = true;
	    if (!readable) callback.call(stream);
	  };
	  var readableEnded = stream._readableState && stream._readableState.endEmitted;
	  var onend = function onend() {
	    readable = false;
	    readableEnded = true;
	    if (!writable) callback.call(stream);
	  };
	  var onerror = function onerror(err) {
	    callback.call(stream, err);
	  };
	  var onclose = function onclose() {
	    var err;
	    if (readable && !readableEnded) {
	      if (!stream._readableState || !stream._readableState.ended) err = new ERR_STREAM_PREMATURE_CLOSE();
	      return callback.call(stream, err);
	    }
	    if (writable && !writableEnded) {
	      if (!stream._writableState || !stream._writableState.ended) err = new ERR_STREAM_PREMATURE_CLOSE();
	      return callback.call(stream, err);
	    }
	  };
	  var onrequest = function onrequest() {
	    stream.req.on('finish', onfinish);
	  };
	  if (isRequest(stream)) {
	    stream.on('complete', onfinish);
	    stream.on('abort', onclose);
	    if (stream.req) onrequest();else stream.on('request', onrequest);
	  } else if (writable && !stream._writableState) {
	    // legacy streams
	    stream.on('end', onlegacyfinish);
	    stream.on('close', onlegacyfinish);
	  }
	  stream.on('end', onend);
	  stream.on('finish', onfinish);
	  if (opts.error !== false) stream.on('error', onerror);
	  stream.on('close', onclose);
	  return function () {
	    stream.removeListener('complete', onfinish);
	    stream.removeListener('abort', onclose);
	    stream.removeListener('request', onrequest);
	    if (stream.req) stream.req.removeListener('finish', onfinish);
	    stream.removeListener('end', onlegacyfinish);
	    stream.removeListener('close', onlegacyfinish);
	    stream.removeListener('finish', onfinish);
	    stream.removeListener('end', onend);
	    stream.removeListener('error', onerror);
	    stream.removeListener('close', onclose);
	  };
	}
	endOfStream = eos;
	return endOfStream;
}

exports.__require = requireEndOfStream;
