import { commonjsGlobal } from '../_virtual/_commonjsHelpers.mjs';
import { __module as pahoMqtt$1 } from '../_virtual/paho-mqtt2.mjs';

/*******************************************************************************
 * Copyright (c) 2013 IBM Corp.
 *
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * and Eclipse Distribution License v1.0 which accompany this distribution.
 *
 * The Eclipse Public License is available at
 *    http://www.eclipse.org/legal/epl-v10.html
 * and the Eclipse Distribution License is available at
 *   http://www.eclipse.org/org/documents/edl-v10.php.
 *
 * Contributors:
 *    Andrew Banks - initial API and implementation and initial documentation
 *******************************************************************************/
var pahoMqtt = pahoMqtt$1.exports;

var hasRequiredPahoMqtt;

function requirePahoMqtt () {
	if (hasRequiredPahoMqtt) return pahoMqtt$1.exports;
	hasRequiredPahoMqtt = 1;
	(function (module, exports) {
		// Only expose a single object name in the global namespace.
		// Everything must go through this module. Global Paho module
		// only has a single public function, client, which returns
		// a Paho client object given connection details.

		/**
		 * Send and receive messages using web browsers.
		 * <p>
		 * This programming interface lets a JavaScript client application use the MQTT V3.1 or
		 * V3.1.1 protocol to connect to an MQTT-supporting messaging server.
		 *
		 * The function supported includes:
		 * <ol>
		 * <li>Connecting to and disconnecting from a server. The server is identified by its host name and port number.
		 * <li>Specifying options that relate to the communications link with the server,
		 * for example the frequency of keep-alive heartbeats, and whether SSL/TLS is required.
		 * <li>Subscribing to and receiving messages from MQTT Topics.
		 * <li>Publishing messages to MQTT Topics.
		 * </ol>
		 * <p>
		 * The API consists of two main objects:
		 * <dl>
		 * <dt><b>{@link Paho.Client}</b></dt>
		 * <dd>This contains methods that provide the functionality of the API,
		 * including provision of callbacks that notify the application when a message
		 * arrives from or is delivered to the messaging server,
		 * or when the status of its connection to the messaging server changes.</dd>
		 * <dt><b>{@link Paho.Message}</b></dt>
		 * <dd>This encapsulates the payload of the message along with various attributes
		 * associated with its delivery, in particular the destination to which it has
		 * been (or is about to be) sent.</dd>
		 * </dl>
		 * <p>
		 * The programming interface validates parameters passed to it, and will throw
		 * an Error containing an error message intended for developer use, if it detects
		 * an error with any parameter.
		 * <p>
		 * Example:
		 *
		 * <code><pre>
		var client = new Paho.MQTT.Client(location.hostname, Number(location.port), "clientId");
		client.onConnectionLost = onConnectionLost;
		client.onMessageArrived = onMessageArrived;
		client.connect({onSuccess:onConnect});

		function onConnect() {
		  // Once a connection has been made, make a subscription and send a message.
		  console.log("onConnect");
		  client.subscribe("/World");
		  var message = new Paho.MQTT.Message("Hello");
		  message.destinationName = "/World";
		  client.send(message);
		};
		function onConnectionLost(responseObject) {
		  if (responseObject.errorCode !== 0)
			console.log("onConnectionLost:"+responseObject.errorMessage);
		};
		function onMessageArrived(message) {
		  console.log("onMessageArrived:"+message.payloadString);
		  client.disconnect();
		};
		 * </pre></code>
		 * @namespace Paho
		 */

		/* jshint shadow:true */
		(function ExportLibrary(root, factory) {
			{
				module.exports = factory();
			}
		})(pahoMqtt, function LibraryFactory() {
			var PahoMQTT = (function (global) {
				// Private variables below, these are only visible inside the function closure
				// which is used to define the module.
				var version = '@VERSION@-@BUILDLEVEL@';

				// 2023-01-05: AWS Amplify change to incorporate upstream pull request:
				// https://github.com/eclipse/paho.mqtt.javascript/pull/247

				/**
				 * @private
				 */
				var localStorage = (function () {
					try {
						// When third-party cookies are disabled accessing localStorage will cause an error
						if (global.localStorage) return global.localStorage;
					} catch (e) {
						var data = {};

						return {
							setItem: function (key, item) {
								data[key] = item;
							},
							getItem: function (key) {
								return data[key];
							},
							removeItem: function (key) {
								delete data[key];
							},
						};
					}
				})();

				// End of AWS Amplify change

				/**
				 * Unique message type identifiers, with associated
				 * associated integer values.
				 * @private
				 */
				var MESSAGE_TYPE = {
					CONNECT: 1,
					CONNACK: 2,
					PUBLISH: 3,
					PUBACK: 4,
					PUBREC: 5,
					PUBREL: 6,
					PUBCOMP: 7,
					SUBSCRIBE: 8,
					SUBACK: 9,
					UNSUBSCRIBE: 10,
					UNSUBACK: 11,
					PINGREQ: 12,
					PINGRESP: 13,
					DISCONNECT: 14,
				};

				// Collection of utility methods used to simplify module code
				// and promote the DRY pattern.

				/**
				 * Validate an object's parameter names to ensure they
				 * match a list of expected variables name for this option
				 * type. Used to ensure option object passed into the API don't
				 * contain erroneous parameters.
				 * @param {Object} obj - User options object
				 * @param {Object} keys - valid keys and types that may exist in obj.
				 * @throws {Error} Invalid option parameter found.
				 * @private
				 */
				var validate = function (obj, keys) {
					for (var key in obj) {
						if (obj.hasOwnProperty(key)) {
							if (keys.hasOwnProperty(key)) {
								if (typeof obj[key] !== keys[key])
									throw new Error(
										format(ERROR.INVALID_TYPE, [typeof obj[key], key]),
									);
							} else {
								var errorStr =
									'Unknown property, ' + key + '. Valid properties are:';
								for (var validKey in keys)
									if (keys.hasOwnProperty(validKey))
										errorStr = errorStr + ' ' + validKey;
								throw new Error(errorStr);
							}
						}
					}
				};

				/**
				 * Return a new function which runs the user function bound
				 * to a fixed scope.
				 * @param {function} User function
				 * @param {object} Function scope
				 * @return {function} User function bound to another scope
				 * @private
				 */
				var scope = function (f, scope) {
					return function () {
						return f.apply(scope, arguments);
					};
				};

				/**
				 * Unique message type identifiers, with associated
				 * associated integer values.
				 * @private
				 */
				var ERROR = {
					OK: { code: 0, text: 'AMQJSC0000I OK.' },
					CONNECT_TIMEOUT: { code: 1, text: 'AMQJSC0001E Connect timed out.' },
					SUBSCRIBE_TIMEOUT: { code: 2, text: 'AMQJS0002E Subscribe timed out.' },
					UNSUBSCRIBE_TIMEOUT: {
						code: 3,
						text: 'AMQJS0003E Unsubscribe timed out.',
					},
					PING_TIMEOUT: { code: 4, text: 'AMQJS0004E Ping timed out.' },
					INTERNAL_ERROR: {
						code: 5,
						text: 'AMQJS0005E Internal error. Error Message: {0}, Stack trace: {1}',
					},
					CONNACK_RETURNCODE: {
						code: 6,
						text: 'AMQJS0006E Bad Connack return code:{0} {1}.',
					},
					SOCKET_ERROR: { code: 7, text: 'AMQJS0007E Socket error:{0}.' },
					SOCKET_CLOSE: { code: 8, text: 'AMQJS0008I Socket closed.' },
					MALFORMED_UTF: {
						code: 9,
						text: 'AMQJS0009E Malformed UTF data:{0} {1} {2}.',
					},
					UNSUPPORTED: {
						code: 10,
						text: 'AMQJS0010E {0} is not supported by this browser.',
					},
					INVALID_STATE: { code: 11, text: 'AMQJS0011E Invalid state {0}.' },
					INVALID_TYPE: { code: 12, text: 'AMQJS0012E Invalid type {0} for {1}.' },
					INVALID_ARGUMENT: {
						code: 13,
						text: 'AMQJS0013E Invalid argument {0} for {1}.',
					},
					UNSUPPORTED_OPERATION: {
						code: 14,
						text: 'AMQJS0014E Unsupported operation.',
					},
					INVALID_STORED_DATA: {
						code: 15,
						text: 'AMQJS0015E Invalid data in local storage key={0} value={1}.',
					},
					INVALID_MQTT_MESSAGE_TYPE: {
						code: 16,
						text: 'AMQJS0016E Invalid MQTT message type {0}.',
					},
					MALFORMED_UNICODE: {
						code: 17,
						text: 'AMQJS0017E Malformed Unicode string:{0} {1}.',
					},
					BUFFER_FULL: {
						code: 18,
						text: 'AMQJS0018E Message buffer is full, maximum buffer size: {0}.',
					},
				};

				/** CONNACK RC Meaning. */
				var CONNACK_RC = {
					0: 'Connection Accepted',
					1: 'Connection Refused: unacceptable protocol version',
					2: 'Connection Refused: identifier rejected',
					3: 'Connection Refused: server unavailable',
					4: 'Connection Refused: bad user name or password',
					5: 'Connection Refused: not authorized',
				};

				/**
				 * Format an error message text.
				 * @private
				 * @param {error} ERROR value above.
				 * @param {substitutions} [array] substituted into the text.
				 * @return the text with the substitutions made.
				 */
				var format = function (error, substitutions) {
					var text = error.text;
					if (substitutions) {
						var field, start;
						for (var i = 0; i < substitutions.length; i++) {
							field = '{' + i + '}';
							start = text.indexOf(field);
							if (start > 0) {
								var part1 = text.substring(0, start);
								var part2 = text.substring(start + field.length);
								text = part1 + substitutions[i] + part2;
							}
						}
					}
					return text;
				};

				//MQTT protocol and version          6    M    Q    I    s    d    p    3
				var MqttProtoIdentifierv3 = [
					0x00, 0x06, 0x4d, 0x51, 0x49, 0x73, 0x64, 0x70, 0x03,
				];
				//MQTT proto/version for 311         4    M    Q    T    T    4
				var MqttProtoIdentifierv4 = [0x00, 0x04, 0x4d, 0x51, 0x54, 0x54, 0x04];

				/**
				 * Construct an MQTT wire protocol message.
				 * @param type MQTT packet type.
				 * @param options optional wire message attributes.
				 *
				 * Optional properties
				 *
				 * messageIdentifier: message ID in the range [0..65535]
				 * payloadMessage:	Application Message - PUBLISH only
				 * connectStrings:	array of 0 or more Strings to be put into the CONNECT payload
				 * topics:			array of strings (SUBSCRIBE, UNSUBSCRIBE)
				 * requestQoS:		array of QoS values [0..2]
				 *
				 * "Flag" properties
				 * cleanSession:	true if present / false if absent (CONNECT)
				 * willMessage:  	true if present / false if absent (CONNECT)
				 * isRetained:		true if present / false if absent (CONNECT)
				 * userName:		true if present / false if absent (CONNECT)
				 * password:		true if present / false if absent (CONNECT)
				 * keepAliveInterval:	integer [0..65535]  (CONNECT)
				 *
				 * @private
				 * @ignore
				 */
				var WireMessage = function (type, options) {
					this.type = type;
					for (var name in options) {
						if (options.hasOwnProperty(name)) {
							this[name] = options[name];
						}
					}
				};

				WireMessage.prototype.encode = function () {
					// Compute the first byte of the fixed header
					var first = (this.type & 0x0f) << 4;

					/*
					 * Now calculate the length of the variable header + payload by adding up the lengths
					 * of all the component parts
					 */

					var remLength = 0;
					var topicStrLength = [];
					var destinationNameLength = 0;
					var willMessagePayloadBytes;

					// if the message contains a messageIdentifier then we need two bytes for that
					if (this.messageIdentifier !== undefined) remLength += 2;

					switch (this.type) {
						// If this a Connect then we need to include 12 bytes for its header
						case MESSAGE_TYPE.CONNECT:
							switch (this.mqttVersion) {
								case 3:
									remLength += MqttProtoIdentifierv3.length + 3;
									break;
								case 4:
									remLength += MqttProtoIdentifierv4.length + 3;
									break;
							}

							remLength += UTF8Length(this.clientId) + 2;
							if (this.willMessage !== undefined) {
								remLength += UTF8Length(this.willMessage.destinationName) + 2;
								// Will message is always a string, sent as UTF-8 characters with a preceding length.
								willMessagePayloadBytes = this.willMessage.payloadBytes;
								if (!(willMessagePayloadBytes instanceof Uint8Array))
									willMessagePayloadBytes = new Uint8Array(payloadBytes);
								remLength += willMessagePayloadBytes.byteLength + 2;
							}
							if (this.userName !== undefined)
								remLength += UTF8Length(this.userName) + 2;
							if (this.password !== undefined)
								remLength += UTF8Length(this.password) + 2;
							break;

						// Subscribe, Unsubscribe can both contain topic strings
						case MESSAGE_TYPE.SUBSCRIBE:
							first |= 0x02; // Qos = 1;
							for (var i = 0; i < this.topics.length; i++) {
								topicStrLength[i] = UTF8Length(this.topics[i]);
								remLength += topicStrLength[i] + 2;
							}
							remLength += this.requestedQos.length; // 1 byte for each topic's Qos
							// QoS on Subscribe only
							break;

						case MESSAGE_TYPE.UNSUBSCRIBE:
							first |= 0x02; // Qos = 1;
							for (var i = 0; i < this.topics.length; i++) {
								topicStrLength[i] = UTF8Length(this.topics[i]);
								remLength += topicStrLength[i] + 2;
							}
							break;

						case MESSAGE_TYPE.PUBREL:
							first |= 0x02; // Qos = 1;
							break;

						case MESSAGE_TYPE.PUBLISH:
							if (this.payloadMessage.duplicate) first |= 0x08;
							first = first |= this.payloadMessage.qos << 1;
							if (this.payloadMessage.retained) first |= 0x01;
							destinationNameLength = UTF8Length(
								this.payloadMessage.destinationName,
							);
							remLength += destinationNameLength + 2;
							var payloadBytes = this.payloadMessage.payloadBytes;
							remLength += payloadBytes.byteLength;
							if (payloadBytes instanceof ArrayBuffer)
								payloadBytes = new Uint8Array(payloadBytes);
							else if (!(payloadBytes instanceof Uint8Array))
								payloadBytes = new Uint8Array(payloadBytes.buffer);
							break;
					}

					// Now we can allocate a buffer for the message

					var mbi = encodeMBI(remLength); // Convert the length to MQTT MBI format
					var pos = mbi.length + 1; // Offset of start of variable header
					var buffer = new ArrayBuffer(remLength + pos);
					var byteStream = new Uint8Array(buffer); // view it as a sequence of bytes

					//Write the fixed header into the buffer
					byteStream[0] = first;
					byteStream.set(mbi, 1);

					// If this is a PUBLISH then the variable header starts with a topic
					if (this.type == MESSAGE_TYPE.PUBLISH)
						pos = writeString(
							this.payloadMessage.destinationName,
							destinationNameLength,
							byteStream,
							pos,
						);
					// If this is a CONNECT then the variable header contains the protocol name/version, flags and keepalive time
					else if (this.type == MESSAGE_TYPE.CONNECT) {
						switch (this.mqttVersion) {
							case 3:
								byteStream.set(MqttProtoIdentifierv3, pos);
								pos += MqttProtoIdentifierv3.length;
								break;
							case 4:
								byteStream.set(MqttProtoIdentifierv4, pos);
								pos += MqttProtoIdentifierv4.length;
								break;
						}
						var connectFlags = 0;
						if (this.cleanSession) connectFlags = 0x02;
						if (this.willMessage !== undefined) {
							connectFlags |= 0x04;
							connectFlags |= this.willMessage.qos << 3;
							if (this.willMessage.retained) {
								connectFlags |= 0x20;
							}
						}
						if (this.userName !== undefined) connectFlags |= 0x80;
						if (this.password !== undefined) connectFlags |= 0x40;
						byteStream[pos++] = connectFlags;
						pos = writeUint16(this.keepAliveInterval, byteStream, pos);
					}

					// Output the messageIdentifier - if there is one
					if (this.messageIdentifier !== undefined)
						pos = writeUint16(this.messageIdentifier, byteStream, pos);

					switch (this.type) {
						case MESSAGE_TYPE.CONNECT:
							pos = writeString(
								this.clientId,
								UTF8Length(this.clientId),
								byteStream,
								pos,
							);
							if (this.willMessage !== undefined) {
								pos = writeString(
									this.willMessage.destinationName,
									UTF8Length(this.willMessage.destinationName),
									byteStream,
									pos,
								);
								pos = writeUint16(
									willMessagePayloadBytes.byteLength,
									byteStream,
									pos,
								);
								byteStream.set(willMessagePayloadBytes, pos);
								pos += willMessagePayloadBytes.byteLength;
							}
							if (this.userName !== undefined)
								pos = writeString(
									this.userName,
									UTF8Length(this.userName),
									byteStream,
									pos,
								);
							if (this.password !== undefined)
								pos = writeString(
									this.password,
									UTF8Length(this.password),
									byteStream,
									pos,
								);
							break;

						case MESSAGE_TYPE.PUBLISH:
							// PUBLISH has a text or binary payload, if text do not add a 2 byte length field, just the UTF characters.
							byteStream.set(payloadBytes, pos);

							break;

						//    	    case MESSAGE_TYPE.PUBREC:
						//    	    case MESSAGE_TYPE.PUBREL:
						//    	    case MESSAGE_TYPE.PUBCOMP:
						//    	    	break;

						case MESSAGE_TYPE.SUBSCRIBE:
							// SUBSCRIBE has a list of topic strings and request QoS
							for (var i = 0; i < this.topics.length; i++) {
								pos = writeString(
									this.topics[i],
									topicStrLength[i],
									byteStream,
									pos,
								);
								byteStream[pos++] = this.requestedQos[i];
							}
							break;

						case MESSAGE_TYPE.UNSUBSCRIBE:
							// UNSUBSCRIBE has a list of topic strings
							for (var i = 0; i < this.topics.length; i++)
								pos = writeString(
									this.topics[i],
									topicStrLength[i],
									byteStream,
									pos,
								);
							break;
						// Do nothing.
					}

					return buffer;
				};

				function decodeMessage(input, pos) {
					var startingPos = pos;
					var first = input[pos];
					var type = first >> 4;
					var messageInfo = (first &= 0x0f);
					pos += 1;

					// Decode the remaining length (MBI format)

					var digit;
					var remLength = 0;
					var multiplier = 1;
					do {
						if (pos == input.length) {
							return [null, startingPos];
						}
						digit = input[pos++];
						remLength += (digit & 0x7f) * multiplier;
						multiplier *= 128;
					} while ((digit & 0x80) !== 0);

					var endPos = pos + remLength;
					if (endPos > input.length) {
						return [null, startingPos];
					}

					var wireMessage = new WireMessage(type);
					switch (type) {
						case MESSAGE_TYPE.CONNACK:
							var connectAcknowledgeFlags = input[pos++];
							if (connectAcknowledgeFlags & 0x01) wireMessage.sessionPresent = true;
							wireMessage.returnCode = input[pos++];
							break;

						case MESSAGE_TYPE.PUBLISH:
							var qos = (messageInfo >> 1) & 0x03;

							var len = readUint16(input, pos);
							pos += 2;
							var topicName = parseUTF8(input, pos, len);
							pos += len;
							// If QoS 1 or 2 there will be a messageIdentifier
							if (qos > 0) {
								wireMessage.messageIdentifier = readUint16(input, pos);
								pos += 2;
							}

							var message = new Message(input.subarray(pos, endPos));
							if ((messageInfo & 0x01) == 0x01) message.retained = true;
							if ((messageInfo & 0x08) == 0x08) message.duplicate = true;
							message.qos = qos;
							message.destinationName = topicName;
							wireMessage.payloadMessage = message;
							break;

						case MESSAGE_TYPE.PUBACK:
						case MESSAGE_TYPE.PUBREC:
						case MESSAGE_TYPE.PUBREL:
						case MESSAGE_TYPE.PUBCOMP:
						case MESSAGE_TYPE.UNSUBACK:
							wireMessage.messageIdentifier = readUint16(input, pos);
							break;

						case MESSAGE_TYPE.SUBACK:
							wireMessage.messageIdentifier = readUint16(input, pos);
							pos += 2;
							wireMessage.returnCode = input.subarray(pos, endPos);
							break;
					}

					return [wireMessage, endPos];
				}

				function writeUint16(input, buffer, offset) {
					buffer[offset++] = input >> 8; //MSB
					buffer[offset++] = input % 256; //LSB
					return offset;
				}

				function writeString(input, utf8Length, buffer, offset) {
					offset = writeUint16(utf8Length, buffer, offset);
					stringToUTF8(input, buffer, offset);
					return offset + utf8Length;
				}

				function readUint16(buffer, offset) {
					return 256 * buffer[offset] + buffer[offset + 1];
				}

				/**
				 * Encodes an MQTT Multi-Byte Integer
				 * @private
				 */
				function encodeMBI(number) {
					var output = new Array(1);
					var numBytes = 0;

					do {
						var digit = number % 128;
						number = number >> 7;
						if (number > 0) {
							digit |= 0x80;
						}
						output[numBytes++] = digit;
					} while (number > 0 && numBytes < 4);

					return output;
				}

				/**
				 * Takes a String and calculates its length in bytes when encoded in UTF8.
				 * @private
				 */
				function UTF8Length(input) {
					var output = 0;
					for (var i = 0; i < input.length; i++) {
						var charCode = input.charCodeAt(i);
						if (charCode > 0x7ff) {
							// Surrogate pair means its a 4 byte character
							if (0xd800 <= charCode && charCode <= 0xdbff) {
								i++;
								output++;
							}
							output += 3;
						} else if (charCode > 0x7f) output += 2;
						else output++;
					}
					return output;
				}

				/**
				 * Takes a String and writes it into an array as UTF8 encoded bytes.
				 * @private
				 */
				function stringToUTF8(input, output, start) {
					var pos = start;
					for (var i = 0; i < input.length; i++) {
						var charCode = input.charCodeAt(i);

						// Check for a surrogate pair.
						if (0xd800 <= charCode && charCode <= 0xdbff) {
							var lowCharCode = input.charCodeAt(++i);
							if (isNaN(lowCharCode)) {
								throw new Error(
									format(ERROR.MALFORMED_UNICODE, [charCode, lowCharCode]),
								);
							}
							charCode =
								((charCode - 0xd800) << 10) + (lowCharCode - 0xdc00) + 0x10000;
						}

						if (charCode <= 0x7f) {
							output[pos++] = charCode;
						} else if (charCode <= 0x7ff) {
							output[pos++] = ((charCode >> 6) & 0x1f) | 0xc0;
							output[pos++] = (charCode & 0x3f) | 0x80;
						} else if (charCode <= 0xffff) {
							output[pos++] = ((charCode >> 12) & 0x0f) | 0xe0;
							output[pos++] = ((charCode >> 6) & 0x3f) | 0x80;
							output[pos++] = (charCode & 0x3f) | 0x80;
						} else {
							output[pos++] = ((charCode >> 18) & 0x07) | 0xf0;
							output[pos++] = ((charCode >> 12) & 0x3f) | 0x80;
							output[pos++] = ((charCode >> 6) & 0x3f) | 0x80;
							output[pos++] = (charCode & 0x3f) | 0x80;
						}
					}
					return output;
				}

				function parseUTF8(input, offset, length) {
					var output = '';
					var utf16;
					var pos = offset;

					while (pos < offset + length) {
						var byte1 = input[pos++];
						if (byte1 < 128) utf16 = byte1;
						else {
							var byte2 = input[pos++] - 128;
							if (byte2 < 0)
								throw new Error(
									format(ERROR.MALFORMED_UTF, [
										byte1.toString(16),
										byte2.toString(16),
										'',
									]),
								);
							if (byte1 < 0xe0)
								// 2 byte character
								utf16 = 64 * (byte1 - 0xc0) + byte2;
							else {
								var byte3 = input[pos++] - 128;
								if (byte3 < 0)
									throw new Error(
										format(ERROR.MALFORMED_UTF, [
											byte1.toString(16),
											byte2.toString(16),
											byte3.toString(16),
										]),
									);
								if (byte1 < 0xf0)
									// 3 byte character
									utf16 = 4096 * (byte1 - 0xe0) + 64 * byte2 + byte3;
								else {
									var byte4 = input[pos++] - 128;
									if (byte4 < 0)
										throw new Error(
											format(ERROR.MALFORMED_UTF, [
												byte1.toString(16),
												byte2.toString(16),
												byte3.toString(16),
												byte4.toString(16),
											]),
										);
									if (byte1 < 0xf8)
										// 4 byte character
										utf16 =
											262144 * (byte1 - 0xf0) + 4096 * byte2 + 64 * byte3 + byte4;
									// longer encodings are not supported
									else
										throw new Error(
											format(ERROR.MALFORMED_UTF, [
												byte1.toString(16),
												byte2.toString(16),
												byte3.toString(16),
												byte4.toString(16),
											]),
										);
								}
							}
						}

						if (utf16 > 0xffff) {
							// 4 byte character - express as a surrogate pair
							utf16 -= 0x10000;
							output += String.fromCharCode(0xd800 + (utf16 >> 10)); // lead character
							utf16 = 0xdc00 + (utf16 & 0x3ff); // trail character
						}
						output += String.fromCharCode(utf16);
					}
					return output;
				}

				/**
				 * Repeat keepalive requests, monitor responses.
				 * @ignore
				 */
				var Pinger = function (client, keepAliveInterval) {
					this._client = client;
					this._keepAliveInterval = keepAliveInterval * 1000;
					this.isReset = false;

					var pingReq = new WireMessage(MESSAGE_TYPE.PINGREQ).encode();

					var doTimeout = function (pinger) {
						return function () {
							return doPing.apply(pinger);
						};
					};

					/** @ignore */
					var doPing = function () {
						if (!this.isReset) {
							this._client._trace('Pinger.doPing', 'Timed out');
							this._client._disconnected(
								ERROR.PING_TIMEOUT.code,
								format(ERROR.PING_TIMEOUT),
							);
						} else {
							this.isReset = false;
							this._client._trace('Pinger.doPing', 'send PINGREQ');
							this._client.socket.send(pingReq);
							this.timeout = setTimeout(doTimeout(this), this._keepAliveInterval);
						}
					};

					this.reset = function () {
						this.isReset = true;
						clearTimeout(this.timeout);
						if (this._keepAliveInterval > 0)
							this.timeout = setTimeout(doTimeout(this), this._keepAliveInterval);
					};

					this.cancel = function () {
						clearTimeout(this.timeout);
					};
				};

				/**
				 * Monitor request completion.
				 * @ignore
				 */
				var Timeout = function (client, timeoutSeconds, action, args) {
					if (!timeoutSeconds) timeoutSeconds = 30;

					var doTimeout = function (action, client, args) {
						return function () {
							return action.apply(client, args);
						};
					};
					this.timeout = setTimeout(
						doTimeout(action, client, args),
						timeoutSeconds * 1000,
					);

					this.cancel = function () {
						clearTimeout(this.timeout);
					};
				};

				/**
				 * Internal implementation of the Websockets MQTT V3.1 client.
				 *
				 * @name Paho.ClientImpl @constructor
				 * @param {String} host the DNS nameof the webSocket host.
				 * @param {Number} port the port number for that host.
				 * @param {String} clientId the MQ client identifier.
				 */
				var ClientImpl = function (uri, host, port, path, clientId) {
					// Check dependencies are satisfied in this browser.
					if (!('WebSocket' in global && global.WebSocket !== null)) {
						throw new Error(format(ERROR.UNSUPPORTED, ['WebSocket']));
					}
					if (!('ArrayBuffer' in global && global.ArrayBuffer !== null)) {
						throw new Error(format(ERROR.UNSUPPORTED, ['ArrayBuffer']));
					}
					this._trace('Paho.Client', uri, host, port, path, clientId);

					this.host = host;
					this.port = port;
					this.path = path;
					this.uri = uri;
					this.clientId = clientId;
					this._wsuri = null;

					// Local storagekeys are qualified with the following string.
					// The conditional inclusion of path in the key is for backward
					// compatibility to when the path was not configurable and assumed to
					// be /mqtt
					this._localKey =
						host +
						':' +
						port +
						(path != '/mqtt' ? ':' + path : '') +
						':' +
						clientId +
						':';

					// Create private instance-only message queue
					// Internal queue of messages to be sent, in sending order.
					this._msg_queue = [];
					this._buffered_msg_queue = [];

					// Messages we have sent and are expecting a response for, indexed by their respective message ids.
					this._sentMessages = {};

					// Messages we have received and acknowleged and are expecting a confirm message for
					// indexed by their respective message ids.
					this._receivedMessages = {};

					// Internal list of callbacks to be executed when messages
					// have been successfully sent over web socket, e.g. disconnect
					// when it doesn't have to wait for ACK, just message is dispatched.
					this._notify_msg_sent = {};

					// Unique identifier for SEND messages, incrementing
					// counter as messages are sent.
					this._message_identifier = 1;

					// Used to determine the transmission sequence of stored sent messages.
					this._sequence = 0;

					// Load the local state, if any, from the saved version, only restore state relevant to this client.
					for (var key in localStorage)
						if (
							key.indexOf('Sent:' + this._localKey) === 0 ||
							key.indexOf('Received:' + this._localKey) === 0
						)
							this.restore(key);
				};

				// Messaging Client public instance members.
				ClientImpl.prototype.host = null;
				ClientImpl.prototype.port = null;
				ClientImpl.prototype.path = null;
				ClientImpl.prototype.uri = null;
				ClientImpl.prototype.clientId = null;

				// Messaging Client private instance members.
				ClientImpl.prototype.socket = null;
				/* true once we have received an acknowledgement to a CONNECT packet. */
				ClientImpl.prototype.connected = false;
				/* The largest message identifier allowed, may not be larger than 2**16 but
				 * if set smaller reduces the maximum number of outbound messages allowed.
				 */
				ClientImpl.prototype.maxMessageIdentifier = 65536;
				ClientImpl.prototype.connectOptions = null;
				ClientImpl.prototype.hostIndex = null;
				ClientImpl.prototype.onConnected = null;
				ClientImpl.prototype.onConnectionLost = null;
				ClientImpl.prototype.onMessageDelivered = null;
				ClientImpl.prototype.onMessageArrived = null;
				ClientImpl.prototype.traceFunction = null;
				ClientImpl.prototype._msg_queue = null;
				ClientImpl.prototype._buffered_msg_queue = null;
				ClientImpl.prototype._connectTimeout = null;
				/* The sendPinger monitors how long we allow before we send data to prove to the server that we are alive. */
				ClientImpl.prototype.sendPinger = null;
				/* The receivePinger monitors how long we allow before we require evidence that the server is alive. */
				ClientImpl.prototype.receivePinger = null;
				ClientImpl.prototype._reconnectInterval = 1; // Reconnect Delay, starts at 1 second
				ClientImpl.prototype._reconnecting = false;
				ClientImpl.prototype._reconnectTimeout = null;
				ClientImpl.prototype.disconnectedPublishing = false;
				ClientImpl.prototype.disconnectedBufferSize = 5000;

				ClientImpl.prototype.receiveBuffer = null;

				ClientImpl.prototype._traceBuffer = null;
				ClientImpl.prototype._MAX_TRACE_ENTRIES = 100;

				ClientImpl.prototype.connect = function (connectOptions) {
					var connectOptionsMasked = this._traceMask(connectOptions, 'password');
					this._trace(
						'Client.connect',
						connectOptionsMasked,
						this.socket,
						this.connected,
					);

					if (this.connected)
						throw new Error(format(ERROR.INVALID_STATE, ['already connected']));
					if (this.socket)
						throw new Error(format(ERROR.INVALID_STATE, ['already connected']));

					if (this._reconnecting) {
						// connect() function is called while reconnect is in progress.
						// Terminate the auto reconnect process to use new connect options.
						this._reconnectTimeout.cancel();
						this._reconnectTimeout = null;
						this._reconnecting = false;
					}

					this.connectOptions = connectOptions;
					this._reconnectInterval = 1;
					this._reconnecting = false;
					if (connectOptions.uris) {
						this.hostIndex = 0;
						this._doConnect(connectOptions.uris[0]);
					} else {
						this._doConnect(this.uri);
					}
				};

				ClientImpl.prototype.subscribe = function (filter, subscribeOptions) {
					this._trace('Client.subscribe', filter, subscribeOptions);

					if (!this.connected)
						throw new Error(format(ERROR.INVALID_STATE, ['not connected']));

					var wireMessage = new WireMessage(MESSAGE_TYPE.SUBSCRIBE);
					wireMessage.topics = filter.constructor === Array ? filter : [filter];
					if (subscribeOptions.qos === undefined) subscribeOptions.qos = 0;
					wireMessage.requestedQos = [];
					for (var i = 0; i < wireMessage.topics.length; i++)
						wireMessage.requestedQos[i] = subscribeOptions.qos;

					if (subscribeOptions.onSuccess) {
						wireMessage.onSuccess = function (grantedQos) {
							subscribeOptions.onSuccess({
								invocationContext: subscribeOptions.invocationContext,
								grantedQos: grantedQos,
							});
						};
					}

					if (subscribeOptions.onFailure) {
						wireMessage.onFailure = function (errorCode) {
							subscribeOptions.onFailure({
								invocationContext: subscribeOptions.invocationContext,
								errorCode: errorCode,
								errorMessage: format(errorCode),
							});
						};
					}

					if (subscribeOptions.timeout) {
						wireMessage.timeOut = new Timeout(
							this,
							subscribeOptions.timeout,
							subscribeOptions.onFailure,
							[
								{
									invocationContext: subscribeOptions.invocationContext,
									errorCode: ERROR.SUBSCRIBE_TIMEOUT.code,
									errorMessage: format(ERROR.SUBSCRIBE_TIMEOUT),
								},
							],
						);
					}

					// All subscriptions return a SUBACK.
					this._requires_ack(wireMessage);
					this._schedule_message(wireMessage);
				};

				/** @ignore */
				ClientImpl.prototype.unsubscribe = function (filter, unsubscribeOptions) {
					this._trace('Client.unsubscribe', filter, unsubscribeOptions);

					if (!this.connected)
						throw new Error(format(ERROR.INVALID_STATE, ['not connected']));

					var wireMessage = new WireMessage(MESSAGE_TYPE.UNSUBSCRIBE);
					wireMessage.topics = filter.constructor === Array ? filter : [filter];

					if (unsubscribeOptions.onSuccess) {
						wireMessage.callback = function () {
							unsubscribeOptions.onSuccess({
								invocationContext: unsubscribeOptions.invocationContext,
							});
						};
					}
					if (unsubscribeOptions.timeout) {
						wireMessage.timeOut = new Timeout(
							this,
							unsubscribeOptions.timeout,
							unsubscribeOptions.onFailure,
							[
								{
									invocationContext: unsubscribeOptions.invocationContext,
									errorCode: ERROR.UNSUBSCRIBE_TIMEOUT.code,
									errorMessage: format(ERROR.UNSUBSCRIBE_TIMEOUT),
								},
							],
						);
					}

					// All unsubscribes return a SUBACK.
					this._requires_ack(wireMessage);
					this._schedule_message(wireMessage);
				};

				ClientImpl.prototype.send = function (message) {
					this._trace('Client.send', message);

					var wireMessage = new WireMessage(MESSAGE_TYPE.PUBLISH);
					wireMessage.payloadMessage = message;

					if (this.connected) {
						// Mark qos 1 & 2 message as "ACK required"
						// For qos 0 message, invoke onMessageDelivered callback if there is one.
						// Then schedule the message.
						if (message.qos > 0) {
							this._requires_ack(wireMessage);
						} else if (this.onMessageDelivered) {
							this._notify_msg_sent[wireMessage] = this.onMessageDelivered(
								wireMessage.payloadMessage,
							);
						}
						this._schedule_message(wireMessage);
					} else {
						// Currently disconnected, will not schedule this message
						// Check if reconnecting is in progress and disconnected publish is enabled.
						if (this._reconnecting && this.disconnectedPublishing) {
							// Check the limit which include the "required ACK" messages
							var messageCount =
								Object.keys(this._sentMessages).length +
								this._buffered_msg_queue.length;
							if (messageCount > this.disconnectedBufferSize) {
								throw new Error(
									format(ERROR.BUFFER_FULL, [this.disconnectedBufferSize]),
								);
							} else {
								if (message.qos > 0) {
									// Mark this message as "ACK required"
									this._requires_ack(wireMessage);
								} else {
									wireMessage.sequence = ++this._sequence;
									// Add messages in fifo order to array, by adding to start
									this._buffered_msg_queue.unshift(wireMessage);
								}
							}
						} else {
							throw new Error(format(ERROR.INVALID_STATE, ['not connected']));
						}
					}
				};

				ClientImpl.prototype.disconnect = function () {
					this._trace('Client.disconnect');

					if (this._reconnecting) {
						// disconnect() function is called while reconnect is in progress.
						// Terminate the auto reconnect process.
						this._reconnectTimeout.cancel();
						this._reconnectTimeout = null;
						this._reconnecting = false;
					}

					if (!this.socket)
						throw new Error(
							format(ERROR.INVALID_STATE, ['not connecting or connected']),
						);

					var wireMessage = new WireMessage(MESSAGE_TYPE.DISCONNECT);

					// Run the disconnected call back as soon as the message has been sent,
					// in case of a failure later on in the disconnect processing.
					// as a consequence, the _disconected call back may be run several times.
					this._notify_msg_sent[wireMessage] = scope(this._disconnected, this);

					this._schedule_message(wireMessage);
				};

				ClientImpl.prototype.getTraceLog = function () {
					if (this._traceBuffer !== null) {
						this._trace('Client.getTraceLog', new Date());
						this._trace(
							'Client.getTraceLog in flight messages',
							this._sentMessages.length,
						);
						for (var key in this._sentMessages)
							this._trace('_sentMessages ', key, this._sentMessages[key]);
						for (var key in this._receivedMessages)
							this._trace('_receivedMessages ', key, this._receivedMessages[key]);

						return this._traceBuffer;
					}
				};

				ClientImpl.prototype.startTrace = function () {
					if (this._traceBuffer === null) {
						this._traceBuffer = [];
					}
					this._trace('Client.startTrace', new Date(), version);
				};

				ClientImpl.prototype.stopTrace = function () {
					delete this._traceBuffer;
				};

				ClientImpl.prototype._doConnect = function (wsurl) {
					// When the socket is open, this client will send the CONNECT WireMessage using the saved parameters.
					if (this.connectOptions.useSSL) {
						var uriParts = wsurl.split(':');
						uriParts[0] = 'wss';
						wsurl = uriParts.join(':');
					}
					this._wsuri = wsurl;
					this.connected = false;

					if (this.connectOptions.mqttVersion < 4) {
						this.socket = new WebSocket(wsurl, ['mqttv3.1']);
					} else {
						this.socket = new WebSocket(wsurl, ['mqtt']);
					}
					this.socket.binaryType = 'arraybuffer';
					this.socket.onopen = scope(this._on_socket_open, this);
					this.socket.onmessage = scope(this._on_socket_message, this);
					this.socket.onerror = scope(this._on_socket_error, this);
					this.socket.onclose = scope(this._on_socket_close, this);

					this.sendPinger = new Pinger(this, this.connectOptions.keepAliveInterval);
					this.receivePinger = new Pinger(
						this,
						this.connectOptions.keepAliveInterval,
					);
					if (this._connectTimeout) {
						this._connectTimeout.cancel();
						this._connectTimeout = null;
					}
					this._connectTimeout = new Timeout(
						this,
						this.connectOptions.timeout,
						this._disconnected,
						[ERROR.CONNECT_TIMEOUT.code, format(ERROR.CONNECT_TIMEOUT)],
					);
				};

				// Schedule a new message to be sent over the WebSockets
				// connection. CONNECT messages cause WebSocket connection
				// to be started. All other messages are queued internally
				// until this has happened. When WS connection starts, process
				// all outstanding messages.
				ClientImpl.prototype._schedule_message = function (message) {
					// Add messages in fifo order to array, by adding to start
					this._msg_queue.unshift(message);
					// Process outstanding messages in the queue if we have an  open socket, and have received CONNACK.
					if (this.connected) {
						this._process_queue();
					}
				};

				ClientImpl.prototype.store = function (prefix, wireMessage) {
					var storedMessage = {
						type: wireMessage.type,
						messageIdentifier: wireMessage.messageIdentifier,
						version: 1,
					};

					switch (wireMessage.type) {
						case MESSAGE_TYPE.PUBLISH:
							if (wireMessage.pubRecReceived) storedMessage.pubRecReceived = true;

							// Convert the payload to a hex string.
							storedMessage.payloadMessage = {};
							var hex = '';
							var messageBytes = wireMessage.payloadMessage.payloadBytes;
							for (var i = 0; i < messageBytes.length; i++) {
								if (messageBytes[i] <= 0xf)
									hex = hex + '0' + messageBytes[i].toString(16);
								else hex = hex + messageBytes[i].toString(16);
							}
							storedMessage.payloadMessage.payloadHex = hex;

							storedMessage.payloadMessage.qos = wireMessage.payloadMessage.qos;
							storedMessage.payloadMessage.destinationName =
								wireMessage.payloadMessage.destinationName;
							if (wireMessage.payloadMessage.duplicate)
								storedMessage.payloadMessage.duplicate = true;
							if (wireMessage.payloadMessage.retained)
								storedMessage.payloadMessage.retained = true;

							// Add a sequence number to sent messages.
							if (prefix.indexOf('Sent:') === 0) {
								if (wireMessage.sequence === undefined)
									wireMessage.sequence = ++this._sequence;
								storedMessage.sequence = wireMessage.sequence;
							}
							break;

						default:
							throw Error(
								format(ERROR.INVALID_STORED_DATA, [
									prefix + this._localKey + wireMessage.messageIdentifier,
									storedMessage,
								]),
							);
					}
					localStorage.setItem(
						prefix + this._localKey + wireMessage.messageIdentifier,
						JSON.stringify(storedMessage),
					);
				};

				ClientImpl.prototype.restore = function (key) {
					var value = localStorage.getItem(key);
					var storedMessage = JSON.parse(value);

					var wireMessage = new WireMessage(storedMessage.type, storedMessage);

					switch (storedMessage.type) {
						case MESSAGE_TYPE.PUBLISH:
							// Replace the payload message with a Message object.
							var hex = storedMessage.payloadMessage.payloadHex;
							var buffer = new ArrayBuffer(hex.length / 2);
							var byteStream = new Uint8Array(buffer);
							var i = 0;
							while (hex.length >= 2) {
								var x = parseInt(hex.substring(0, 2), 16);
								hex = hex.substring(2, hex.length);
								byteStream[i++] = x;
							}
							var payloadMessage = new Message(byteStream);

							payloadMessage.qos = storedMessage.payloadMessage.qos;
							payloadMessage.destinationName =
								storedMessage.payloadMessage.destinationName;
							if (storedMessage.payloadMessage.duplicate)
								payloadMessage.duplicate = true;
							if (storedMessage.payloadMessage.retained)
								payloadMessage.retained = true;
							wireMessage.payloadMessage = payloadMessage;

							break;

						default:
							throw Error(format(ERROR.INVALID_STORED_DATA, [key, value]));
					}

					if (key.indexOf('Sent:' + this._localKey) === 0) {
						wireMessage.payloadMessage.duplicate = true;
						this._sentMessages[wireMessage.messageIdentifier] = wireMessage;
					} else if (key.indexOf('Received:' + this._localKey) === 0) {
						this._receivedMessages[wireMessage.messageIdentifier] = wireMessage;
					}
				};

				ClientImpl.prototype._process_queue = function () {
					var message = null;

					// Send all queued messages down socket connection
					while ((message = this._msg_queue.pop())) {
						this._socket_send(message);
						// Notify listeners that message was successfully sent
						if (this._notify_msg_sent[message]) {
							this._notify_msg_sent[message]();
							delete this._notify_msg_sent[message];
						}
					}
				};

				/**
				 * Expect an ACK response for this message. Add message to the set of in progress
				 * messages and set an unused identifier in this message.
				 * @ignore
				 */
				ClientImpl.prototype._requires_ack = function (wireMessage) {
					var messageCount = Object.keys(this._sentMessages).length;
					if (messageCount > this.maxMessageIdentifier)
						throw Error('Too many messages:' + messageCount);

					while (this._sentMessages[this._message_identifier] !== undefined) {
						this._message_identifier++;
					}
					wireMessage.messageIdentifier = this._message_identifier;
					this._sentMessages[wireMessage.messageIdentifier] = wireMessage;
					if (wireMessage.type === MESSAGE_TYPE.PUBLISH) {
						this.store('Sent:', wireMessage);
					}
					if (this._message_identifier === this.maxMessageIdentifier) {
						this._message_identifier = 1;
					}
				};

				/**
				 * Called when the underlying websocket has been opened.
				 * @ignore
				 */
				ClientImpl.prototype._on_socket_open = function () {
					// Create the CONNECT message object.
					var wireMessage = new WireMessage(
						MESSAGE_TYPE.CONNECT,
						this.connectOptions,
					);
					wireMessage.clientId = this.clientId;
					this._socket_send(wireMessage);
				};

				/**
				 * Called when the underlying websocket has received a complete packet.
				 * @ignore
				 */
				ClientImpl.prototype._on_socket_message = function (event) {
					this._trace('Client._on_socket_message', event.data);
					var messages = this._deframeMessages(event.data);
					for (var i = 0; i < messages.length; i += 1) {
						this._handleMessage(messages[i]);
					}
				};

				ClientImpl.prototype._deframeMessages = function (data) {
					var byteArray = new Uint8Array(data);
					var messages = [];
					if (this.receiveBuffer) {
						var newData = new Uint8Array(
							this.receiveBuffer.length + byteArray.length,
						);
						newData.set(this.receiveBuffer);
						newData.set(byteArray, this.receiveBuffer.length);
						byteArray = newData;
						delete this.receiveBuffer;
					}
					try {
						var offset = 0;
						while (offset < byteArray.length) {
							var result = decodeMessage(byteArray, offset);
							var wireMessage = result[0];
							offset = result[1];
							if (wireMessage !== null) {
								messages.push(wireMessage);
							} else {
								break;
							}
						}
						if (offset < byteArray.length) {
							this.receiveBuffer = byteArray.subarray(offset);
						}
					} catch (error) {
						var errorStack =
							error.hasOwnProperty('stack') == 'undefined'
								? error.stack.toString()
								: 'No Error Stack Available';
						this._disconnected(
							ERROR.INTERNAL_ERROR.code,
							format(ERROR.INTERNAL_ERROR, [error.message, errorStack]),
						);
						return;
					}
					return messages;
				};

				ClientImpl.prototype._handleMessage = function (wireMessage) {
					this._trace('Client._handleMessage', wireMessage);

					try {
						switch (wireMessage.type) {
							case MESSAGE_TYPE.CONNACK:
								this._connectTimeout.cancel();
								if (this._reconnectTimeout) this._reconnectTimeout.cancel();

								// If we have started using clean session then clear up the local state.
								if (this.connectOptions.cleanSession) {
									for (var key in this._sentMessages) {
										var sentMessage = this._sentMessages[key];
										localStorage.removeItem(
											'Sent:' + this._localKey + sentMessage.messageIdentifier,
										);
									}
									this._sentMessages = {};

									for (var key in this._receivedMessages) {
										var receivedMessage = this._receivedMessages[key];
										localStorage.removeItem(
											'Received:' +
												this._localKey +
												receivedMessage.messageIdentifier,
										);
									}
									this._receivedMessages = {};
								}
								// Client connected and ready for business.
								if (wireMessage.returnCode === 0) {
									this.connected = true;
									// Jump to the end of the list of uris and stop looking for a good host.

									if (this.connectOptions.uris)
										this.hostIndex = this.connectOptions.uris.length;
								} else {
									this._disconnected(
										ERROR.CONNACK_RETURNCODE.code,
										format(ERROR.CONNACK_RETURNCODE, [
											wireMessage.returnCode,
											CONNACK_RC[wireMessage.returnCode],
										]),
									);
									break;
								}

								// Resend messages.
								var sequencedMessages = [];
								for (var msgId in this._sentMessages) {
									if (this._sentMessages.hasOwnProperty(msgId))
										sequencedMessages.push(this._sentMessages[msgId]);
								}

								// Also schedule qos 0 buffered messages if any
								if (this._buffered_msg_queue.length > 0) {
									var msg = null;
									while ((msg = this._buffered_msg_queue.pop())) {
										sequencedMessages.push(msg);
										if (this.onMessageDelivered)
											this._notify_msg_sent[msg] = this.onMessageDelivered(
												msg.payloadMessage,
											);
									}
								}

								// Sort sentMessages into the original sent order.
								var sequencedMessages = sequencedMessages.sort(function (a, b) {
									return a.sequence - b.sequence;
								});
								for (var i = 0, len = sequencedMessages.length; i < len; i++) {
									var sentMessage = sequencedMessages[i];
									if (
										sentMessage.type == MESSAGE_TYPE.PUBLISH &&
										sentMessage.pubRecReceived
									) {
										var pubRelMessage = new WireMessage(MESSAGE_TYPE.PUBREL, {
											messageIdentifier: sentMessage.messageIdentifier,
										});
										this._schedule_message(pubRelMessage);
									} else {
										this._schedule_message(sentMessage);
									}
								}

								// Execute the connectOptions.onSuccess callback if there is one.
								// Will also now return if this connection was the result of an automatic
								// reconnect and which URI was successfully connected to.
								if (this.connectOptions.onSuccess) {
									this.connectOptions.onSuccess({
										invocationContext: this.connectOptions.invocationContext,
									});
								}

								var reconnected = false;
								if (this._reconnecting) {
									reconnected = true;
									this._reconnectInterval = 1;
									this._reconnecting = false;
								}

								// Execute the onConnected callback if there is one.
								this._connected(reconnected, this._wsuri);

								// Process all queued messages now that the connection is established.
								this._process_queue();
								break;

							case MESSAGE_TYPE.PUBLISH:
								this._receivePublish(wireMessage);
								break;

							case MESSAGE_TYPE.PUBACK:
								var sentMessage = this._sentMessages[wireMessage.messageIdentifier];
								// If this is a re flow of a PUBACK after we have restarted receivedMessage will not exist.
								if (sentMessage) {
									delete this._sentMessages[wireMessage.messageIdentifier];
									localStorage.removeItem(
										'Sent:' + this._localKey + wireMessage.messageIdentifier,
									);
									if (this.onMessageDelivered)
										this.onMessageDelivered(sentMessage.payloadMessage);
								}
								break;

							case MESSAGE_TYPE.PUBREC:
								var sentMessage = this._sentMessages[wireMessage.messageIdentifier];
								// If this is a re flow of a PUBREC after we have restarted receivedMessage will not exist.
								if (sentMessage) {
									sentMessage.pubRecReceived = true;
									var pubRelMessage = new WireMessage(MESSAGE_TYPE.PUBREL, {
										messageIdentifier: wireMessage.messageIdentifier,
									});
									this.store('Sent:', sentMessage);
									this._schedule_message(pubRelMessage);
								}
								break;

							case MESSAGE_TYPE.PUBREL:
								var receivedMessage =
									this._receivedMessages[wireMessage.messageIdentifier];
								localStorage.removeItem(
									'Received:' + this._localKey + wireMessage.messageIdentifier,
								);
								// If this is a re flow of a PUBREL after we have restarted receivedMessage will not exist.
								if (receivedMessage) {
									this._receiveMessage(receivedMessage);
									delete this._receivedMessages[wireMessage.messageIdentifier];
								}
								// Always flow PubComp, we may have previously flowed PubComp but the server lost it and restarted.
								var pubCompMessage = new WireMessage(MESSAGE_TYPE.PUBCOMP, {
									messageIdentifier: wireMessage.messageIdentifier,
								});
								this._schedule_message(pubCompMessage);

								break;

							case MESSAGE_TYPE.PUBCOMP:
								var sentMessage = this._sentMessages[wireMessage.messageIdentifier];
								delete this._sentMessages[wireMessage.messageIdentifier];
								localStorage.removeItem(
									'Sent:' + this._localKey + wireMessage.messageIdentifier,
								);
								if (this.onMessageDelivered)
									this.onMessageDelivered(sentMessage.payloadMessage);
								break;

							case MESSAGE_TYPE.SUBACK:
								var sentMessage = this._sentMessages[wireMessage.messageIdentifier];
								if (sentMessage) {
									if (sentMessage.timeOut) sentMessage.timeOut.cancel();
									// This will need to be fixed when we add multiple topic support
									if (wireMessage.returnCode[0] === 0x80) {
										if (sentMessage.onFailure) {
											sentMessage.onFailure(wireMessage.returnCode);
										}
									} else if (sentMessage.onSuccess) {
										sentMessage.onSuccess(wireMessage.returnCode);
									}
									delete this._sentMessages[wireMessage.messageIdentifier];
								}
								break;

							case MESSAGE_TYPE.UNSUBACK:
								var sentMessage = this._sentMessages[wireMessage.messageIdentifier];
								if (sentMessage) {
									if (sentMessage.timeOut) sentMessage.timeOut.cancel();
									if (sentMessage.callback) {
										sentMessage.callback();
									}
									delete this._sentMessages[wireMessage.messageIdentifier];
								}

								break;

							case MESSAGE_TYPE.PINGRESP:
								/* The sendPinger or receivePinger may have sent a ping, the receivePinger has already been reset. */
								this.sendPinger.reset();
								break;

							case MESSAGE_TYPE.DISCONNECT:
								// Clients do not expect to receive disconnect packets.
								this._disconnected(
									ERROR.INVALID_MQTT_MESSAGE_TYPE.code,
									format(ERROR.INVALID_MQTT_MESSAGE_TYPE, [wireMessage.type]),
								);
								break;

							default:
								this._disconnected(
									ERROR.INVALID_MQTT_MESSAGE_TYPE.code,
									format(ERROR.INVALID_MQTT_MESSAGE_TYPE, [wireMessage.type]),
								);
						}
					} catch (error) {
						var errorStack =
							error.hasOwnProperty('stack') == 'undefined'
								? error.stack.toString()
								: 'No Error Stack Available';
						this._disconnected(
							ERROR.INTERNAL_ERROR.code,
							format(ERROR.INTERNAL_ERROR, [error.message, errorStack]),
						);
						return;
					}
				};

				/** @ignore */
				ClientImpl.prototype._on_socket_error = function (error) {
					if (!this._reconnecting) {
						this._disconnected(
							ERROR.SOCKET_ERROR.code,
							format(ERROR.SOCKET_ERROR, [error.data]),
						);
					}
				};

				/** @ignore */
				ClientImpl.prototype._on_socket_close = function () {
					if (!this._reconnecting) {
						this._disconnected(ERROR.SOCKET_CLOSE.code, format(ERROR.SOCKET_CLOSE));
					}
				};

				/** @ignore */
				ClientImpl.prototype._socket_send = function (wireMessage) {
					if (wireMessage.type == 1) {
						var wireMessageMasked = this._traceMask(wireMessage, 'password');
						this._trace('Client._socket_send', wireMessageMasked);
					} else this._trace('Client._socket_send', wireMessage);

					this.socket.send(wireMessage.encode());
					/* We have proved to the server we are alive. */
					this.sendPinger.reset();
				};

				/** @ignore */
				ClientImpl.prototype._receivePublish = function (wireMessage) {
					switch (wireMessage.payloadMessage.qos) {
						case 'undefined':
						case 0:
							this._receiveMessage(wireMessage);
							break;

						case 1:
							var pubAckMessage = new WireMessage(MESSAGE_TYPE.PUBACK, {
								messageIdentifier: wireMessage.messageIdentifier,
							});
							this._schedule_message(pubAckMessage);
							this._receiveMessage(wireMessage);
							break;

						case 2:
							this._receivedMessages[wireMessage.messageIdentifier] = wireMessage;
							this.store('Received:', wireMessage);
							var pubRecMessage = new WireMessage(MESSAGE_TYPE.PUBREC, {
								messageIdentifier: wireMessage.messageIdentifier,
							});
							this._schedule_message(pubRecMessage);

							break;

						default:
							throw Error('Invaild qos=' + wireMessage.payloadMessage.qos);
					}
				};

				/** @ignore */
				ClientImpl.prototype._receiveMessage = function (wireMessage) {
					if (this.onMessageArrived) {
						this.onMessageArrived(wireMessage.payloadMessage);
					}
				};

				/**
				 * Client has connected.
				 * @param {reconnect} [boolean] indicate if this was a result of reconnect operation.
				 * @param {uri} [string] fully qualified WebSocket URI of the server.
				 */
				ClientImpl.prototype._connected = function (reconnect, uri) {
					// Execute the onConnected callback if there is one.
					if (this.onConnected) this.onConnected(reconnect, uri);
				};

				/**
				 * Attempts to reconnect the client to the server.
				 * For each reconnect attempt, will double the reconnect interval
				 * up to 128 seconds.
				 */
				ClientImpl.prototype._reconnect = function () {
					this._trace('Client._reconnect');
					if (!this.connected) {
						this._reconnecting = true;
						this.sendPinger.cancel();
						this.receivePinger.cancel();
						if (this._reconnectInterval < 128)
							this._reconnectInterval = this._reconnectInterval * 2;
						if (this.connectOptions.uris) {
							this.hostIndex = 0;
							this._doConnect(this.connectOptions.uris[0]);
						} else {
							this._doConnect(this.uri);
						}
					}
				};

				/**
				 * Client has disconnected either at its own request or because the server
				 * or network disconnected it. Remove all non-durable state.
				 * @param {errorCode} [number] the error number.
				 * @param {errorText} [string] the error text.
				 * @ignore
				 */
				ClientImpl.prototype._disconnected = function (errorCode, errorText) {
					this._trace('Client._disconnected', errorCode, errorText);

					if (errorCode !== undefined && this._reconnecting) {
						//Continue automatic reconnect process
						this._reconnectTimeout = new Timeout(
							this,
							this._reconnectInterval,
							this._reconnect,
						);
						return;
					}

					this.sendPinger.cancel();
					this.receivePinger.cancel();
					if (this._connectTimeout) {
						this._connectTimeout.cancel();
						this._connectTimeout = null;
					}

					// Clear message buffers.
					this._msg_queue = [];
					this._buffered_msg_queue = [];
					this._notify_msg_sent = {};

					if (this.socket) {
						// Cancel all socket callbacks so that they cannot be driven again by this socket.
						this.socket.onopen = null;
						this.socket.onmessage = null;
						this.socket.onerror = null;
						this.socket.onclose = null;
						if (this.socket.readyState === 1) this.socket.close();
						delete this.socket;
					}

					if (
						this.connectOptions.uris &&
						this.hostIndex < this.connectOptions.uris.length - 1
					) {
						// Try the next host.
						this.hostIndex++;
						this._doConnect(this.connectOptions.uris[this.hostIndex]);
					} else {
						if (errorCode === undefined) {
							errorCode = ERROR.OK.code;
							errorText = format(ERROR.OK);
						}

						// Run any application callbacks last as they may attempt to reconnect and hence create a new socket.
						if (this.connected) {
							this.connected = false;
							// Execute the connectionLostCallback if there is one, and we were connected.
							if (this.onConnectionLost) {
								this.onConnectionLost({
									errorCode: errorCode,
									errorMessage: errorText,
									reconnect: this.connectOptions.reconnect,
									uri: this._wsuri,
								});
							}
							if (errorCode !== ERROR.OK.code && this.connectOptions.reconnect) {
								// Start automatic reconnect process for the very first time since last successful connect.
								this._reconnectInterval = 1;
								this._reconnect();
								return;
							}
						} else {
							// Otherwise we never had a connection, so indicate that the connect has failed.
							if (
								this.connectOptions.mqttVersion === 4 &&
								this.connectOptions.mqttVersionExplicit === false
							) {
								this._trace('Failed to connect V4, dropping back to V3');
								this.connectOptions.mqttVersion = 3;
								if (this.connectOptions.uris) {
									this.hostIndex = 0;
									this._doConnect(this.connectOptions.uris[0]);
								} else {
									this._doConnect(this.uri);
								}
							} else if (this.connectOptions.onFailure) {
								this.connectOptions.onFailure({
									invocationContext: this.connectOptions.invocationContext,
									errorCode: errorCode,
									errorMessage: errorText,
								});
							}
						}
					}
				};

				/** @ignore */
				ClientImpl.prototype._trace = function () {
					// Pass trace message back to client's callback function
					if (this.traceFunction) {
						var args = Array.prototype.slice.call(arguments);
						for (var i in args) {
							if (typeof args[i] !== 'undefined')
								args.splice(i, 1, JSON.stringify(args[i]));
						}
						var record = args.join('');
						this.traceFunction({ severity: 'Debug', message: record });
					}

					//buffer style trace
					if (this._traceBuffer !== null) {
						for (var i = 0, max = arguments.length; i < max; i++) {
							if (this._traceBuffer.length == this._MAX_TRACE_ENTRIES) {
								this._traceBuffer.shift();
							}
							if (i === 0) this._traceBuffer.push(arguments[i]);
							else if (typeof arguments[i] === 'undefined')
								this._traceBuffer.push(arguments[i]);
							else this._traceBuffer.push('  ' + JSON.stringify(arguments[i]));
						}
					}
				};

				/** @ignore */
				ClientImpl.prototype._traceMask = function (traceObject, masked) {
					var traceObjectMasked = {};
					for (var attr in traceObject) {
						if (traceObject.hasOwnProperty(attr)) {
							if (attr == masked) traceObjectMasked[attr] = '******';
							else traceObjectMasked[attr] = traceObject[attr];
						}
					}
					return traceObjectMasked;
				};

				// ------------------------------------------------------------------------
				// Public Programming interface.
				// ------------------------------------------------------------------------

				/**
				 * The JavaScript application communicates to the server using a {@link Paho.Client} object.
				 * <p>
				 * Most applications will create just one Client object and then call its connect() method,
				 * however applications can create more than one Client object if they wish.
				 * In this case the combination of host, port and clientId attributes must be different for each Client object.
				 * <p>
				 * The send, subscribe and unsubscribe methods are implemented as asynchronous JavaScript methods
				 * (even though the underlying protocol exchange might be synchronous in nature).
				 * This means they signal their completion by calling back to the application,
				 * via Success or Failure callback functions provided by the application on the method in question.
				 * Such callbacks are called at most once per method invocation and do not persist beyond the lifetime
				 * of the script that made the invocation.
				 * <p>
				 * In contrast there are some callback functions, most notably <i>onMessageArrived</i>,
				 * that are defined on the {@link Paho.Client} object.
				 * These may get called multiple times, and aren't directly related to specific method invocations made by the client.
				 *
				 * @name Paho.Client
				 *
				 * @constructor
				 *
				 * @param {string} host - the address of the messaging server, as a fully qualified WebSocket URI, as a DNS name or dotted decimal IP address.
				 * @param {number} port - the port number to connect to - only required if host is not a URI
				 * @param {string} path - the path on the host to connect to - only used if host is not a URI. Default: '/mqtt'.
				 * @param {string} clientId - the Messaging client identifier, between 1 and 23 characters in length.
				 *
				 * @property {string} host - <i>read only</i> the server's DNS hostname or dotted decimal IP address.
				 * @property {number} port - <i>read only</i> the server's port.
				 * @property {string} path - <i>read only</i> the server's path.
				 * @property {string} clientId - <i>read only</i> used when connecting to the server.
				 * @property {function} onConnectionLost - called when a connection has been lost.
				 *                            after a connect() method has succeeded.
				 *                            Establish the call back used when a connection has been lost. The connection may be
				 *                            lost because the client initiates a disconnect or because the server or network
				 *                            cause the client to be disconnected. The disconnect call back may be called without
				 *                            the connectionComplete call back being invoked if, for example the client fails to
				 *                            connect.
				 *                            A single response object parameter is passed to the onConnectionLost callback containing the following fields:
				 *                            <ol>
				 *                            <li>errorCode
				 *                            <li>errorMessage
				 *                            </ol>
				 * @property {function} onMessageDelivered - called when a message has been delivered.
				 *                            All processing that this Client will ever do has been completed. So, for example,
				 *                            in the case of a Qos=2 message sent by this client, the PubComp flow has been received from the server
				 *                            and the message has been removed from persistent storage before this callback is invoked.
				 *                            Parameters passed to the onMessageDelivered callback are:
				 *                            <ol>
				 *                            <li>{@link Paho.Message} that was delivered.
				 *                            </ol>
				 * @property {function} onMessageArrived - called when a message has arrived in this Paho.client.
				 *                            Parameters passed to the onMessageArrived callback are:
				 *                            <ol>
				 *                            <li>{@link Paho.Message} that has arrived.
				 *                            </ol>
				 * @property {function} onConnected - called when a connection is successfully made to the server.
				 *                                  after a connect() method.
				 *                                  Parameters passed to the onConnected callback are:
				 *                                  <ol>
				 *                                  <li>reconnect (boolean) - If true, the connection was the result of a reconnect.</li>
				 *                                  <li>URI (string) - The URI used to connect to the server.</li>
				 *                                  </ol>
				 * @property {boolean} disconnectedPublishing - if set, will enable disconnected publishing in
				 *                                            in the event that the connection to the server is lost.
				 * @property {number} disconnectedBufferSize - Used to set the maximum number of messages that the disconnected
				 *                                             buffer will hold before rejecting new messages. Default size: 5000 messages
				 * @property {function} trace - called whenever trace is called. TODO
				 */
				var Client = function (host, port, path, clientId) {
					var uri;

					if (typeof host !== 'string')
						throw new Error(format(ERROR.INVALID_TYPE, [typeof host, 'host']));

					if (arguments.length == 2) {
						// host: must be full ws:// uri
						// port: clientId
						clientId = port;
						uri = host;
						var match = uri.match(
							/^(wss?):\/\/((\[(.+)\])|([^\/]+?))(:(\d+))?(\/.*)$/,
						);
						if (match) {
							host = match[4] || match[2];
							port = parseInt(match[7]);
							path = match[8];
						} else {
							throw new Error(format(ERROR.INVALID_ARGUMENT, [host, 'host']));
						}
					} else {
						if (arguments.length == 3) {
							clientId = path;
							path = '/mqtt';
						}
						if (typeof port !== 'number' || port < 0)
							throw new Error(format(ERROR.INVALID_TYPE, [typeof port, 'port']));
						if (typeof path !== 'string')
							throw new Error(format(ERROR.INVALID_TYPE, [typeof path, 'path']));

						var ipv6AddSBracket =
							host.indexOf(':') !== -1 &&
							host.slice(0, 1) !== '[' &&
							host.slice(-1) !== ']';
						uri =
							'ws://' +
							(ipv6AddSBracket ? '[' + host + ']' : host) +
							':' +
							port +
							path;
					}

					var clientIdLength = 0;
					for (var i = 0; i < clientId.length; i++) {
						var charCode = clientId.charCodeAt(i);
						if (0xd800 <= charCode && charCode <= 0xdbff) {
							i++; // Surrogate pair.
						}
						clientIdLength++;
					}
					if (typeof clientId !== 'string' || clientIdLength > 65535)
						throw new Error(format(ERROR.INVALID_ARGUMENT, [clientId, 'clientId']));

					var client = new ClientImpl(uri, host, port, path, clientId);

					//Public Properties
					Object.defineProperties(this, {
						host: {
							get: function () {
								return host;
							},
							set: function () {
								throw new Error(format(ERROR.UNSUPPORTED_OPERATION));
							},
						},
						port: {
							get: function () {
								return port;
							},
							set: function () {
								throw new Error(format(ERROR.UNSUPPORTED_OPERATION));
							},
						},
						path: {
							get: function () {
								return path;
							},
							set: function () {
								throw new Error(format(ERROR.UNSUPPORTED_OPERATION));
							},
						},
						uri: {
							get: function () {
								return uri;
							},
							set: function () {
								throw new Error(format(ERROR.UNSUPPORTED_OPERATION));
							},
						},
						clientId: {
							get: function () {
								return client.clientId;
							},
							set: function () {
								throw new Error(format(ERROR.UNSUPPORTED_OPERATION));
							},
						},
						onConnected: {
							get: function () {
								return client.onConnected;
							},
							set: function (newOnConnected) {
								if (typeof newOnConnected === 'function')
									client.onConnected = newOnConnected;
								else
									throw new Error(
										format(ERROR.INVALID_TYPE, [
											typeof newOnConnected,
											'onConnected',
										]),
									);
							},
						},
						disconnectedPublishing: {
							get: function () {
								return client.disconnectedPublishing;
							},
							set: function (newDisconnectedPublishing) {
								client.disconnectedPublishing = newDisconnectedPublishing;
							},
						},
						disconnectedBufferSize: {
							get: function () {
								return client.disconnectedBufferSize;
							},
							set: function (newDisconnectedBufferSize) {
								client.disconnectedBufferSize = newDisconnectedBufferSize;
							},
						},
						onConnectionLost: {
							get: function () {
								return client.onConnectionLost;
							},
							set: function (newOnConnectionLost) {
								if (typeof newOnConnectionLost === 'function')
									client.onConnectionLost = newOnConnectionLost;
								else
									throw new Error(
										format(ERROR.INVALID_TYPE, [
											typeof newOnConnectionLost,
											'onConnectionLost',
										]),
									);
							},
						},
						onMessageDelivered: {
							get: function () {
								return client.onMessageDelivered;
							},
							set: function (newOnMessageDelivered) {
								if (typeof newOnMessageDelivered === 'function')
									client.onMessageDelivered = newOnMessageDelivered;
								else
									throw new Error(
										format(ERROR.INVALID_TYPE, [
											typeof newOnMessageDelivered,
											'onMessageDelivered',
										]),
									);
							},
						},
						onMessageArrived: {
							get: function () {
								return client.onMessageArrived;
							},
							set: function (newOnMessageArrived) {
								if (typeof newOnMessageArrived === 'function')
									client.onMessageArrived = newOnMessageArrived;
								else
									throw new Error(
										format(ERROR.INVALID_TYPE, [
											typeof newOnMessageArrived,
											'onMessageArrived',
										]),
									);
							},
						},
						trace: {
							get: function () {
								return client.traceFunction;
							},
							set: function (trace) {
								if (typeof trace === 'function') {
									client.traceFunction = trace;
								} else {
									throw new Error(
										format(ERROR.INVALID_TYPE, [typeof trace, 'onTrace']),
									);
								}
							},
						},
					});

					/**
					 * Connect this Messaging client to its server.
					 *
					 * @name Paho.Client#connect
					 * @function
					 * @param {object} connectOptions - Attributes used with the connection.
					 * @param {number} connectOptions.timeout - If the connect has not succeeded within this
					 *                    number of seconds, it is deemed to have failed.
					 *                    The default is 30 seconds.
					 * @param {string} connectOptions.userName - Authentication username for this connection.
					 * @param {string} connectOptions.password - Authentication password for this connection.
					 * @param {Paho.Message} connectOptions.willMessage - sent by the server when the client
					 *                    disconnects abnormally.
					 * @param {number} connectOptions.keepAliveInterval - the server disconnects this client if
					 *                    there is no activity for this number of seconds.
					 *                    The default value of 60 seconds is assumed if not set.
					 * @param {boolean} connectOptions.cleanSession - if true(default) the client and server
					 *                    persistent state is deleted on successful connect.
					 * @param {boolean} connectOptions.useSSL - if present and true, use an SSL Websocket connection.
					 * @param {object} connectOptions.invocationContext - passed to the onSuccess callback or onFailure callback.
					 * @param {function} connectOptions.onSuccess - called when the connect acknowledgement
					 *                    has been received from the server.
					 * A single response object parameter is passed to the onSuccess callback containing the following fields:
					 * <ol>
					 * <li>invocationContext as passed in to the onSuccess method in the connectOptions.
					 * </ol>
					 * @param {function} connectOptions.onFailure - called when the connect request has failed or timed out.
					 * A single response object parameter is passed to the onFailure callback containing the following fields:
					 * <ol>
					 * <li>invocationContext as passed in to the onFailure method in the connectOptions.
					 * <li>errorCode a number indicating the nature of the error.
					 * <li>errorMessage text describing the error.
					 * </ol>
					 * @param {array} connectOptions.hosts - If present this contains either a set of hostnames or fully qualified
					 * WebSocket URIs (ws://iot.eclipse.org:80/ws), that are tried in order in place
					 * of the host and port paramater on the construtor. The hosts are tried one at at time in order until
					 * one of then succeeds.
					 * @param {array} connectOptions.ports - If present the set of ports matching the hosts. If hosts contains URIs, this property
					 * is not used.
					 * @param {boolean} connectOptions.reconnect - Sets whether the client will automatically attempt to reconnect
					 * to the server if the connection is lost.
					 *<ul>
					 *<li>If set to false, the client will not attempt to automatically reconnect to the server in the event that the
					 * connection is lost.</li>
					 *<li>If set to true, in the event that the connection is lost, the client will attempt to reconnect to the server.
					 * It will initially wait 1 second before it attempts to reconnect, for every failed reconnect attempt, the delay
					 * will double until it is at 2 minutes at which point the delay will stay at 2 minutes.</li>
					 *</ul>
					 * @param {number} connectOptions.mqttVersion - The version of MQTT to use to connect to the MQTT Broker.
					 *<ul>
					 *<li>3 - MQTT V3.1</li>
					 *<li>4 - MQTT V3.1.1</li>
					 *</ul>
					 * @param {boolean} connectOptions.mqttVersionExplicit - If set to true, will force the connection to use the
					 * selected MQTT Version or will fail to connect.
					 * @param {array} connectOptions.uris - If present, should contain a list of fully qualified WebSocket uris
					 * (e.g. ws://iot.eclipse.org:80/ws), that are tried in order in place of the host and port parameter of the construtor.
					 * The uris are tried one at a time in order until one of them succeeds. Do not use this in conjunction with hosts as
					 * the hosts array will be converted to uris and will overwrite this property.
					 * @throws {InvalidState} If the client is not in disconnected state. The client must have received connectionLost
					 * or disconnected before calling connect for a second or subsequent time.
					 */
					this.connect = function (connectOptions) {
						connectOptions = connectOptions || {};
						validate(connectOptions, {
							timeout: 'number',
							userName: 'string',
							password: 'string',
							willMessage: 'object',
							keepAliveInterval: 'number',
							cleanSession: 'boolean',
							useSSL: 'boolean',
							invocationContext: 'object',
							onSuccess: 'function',
							onFailure: 'function',
							hosts: 'object',
							ports: 'object',
							reconnect: 'boolean',
							mqttVersion: 'number',
							mqttVersionExplicit: 'boolean',
							uris: 'object',
						});

						// If no keep alive interval is set, assume 60 seconds.
						if (connectOptions.keepAliveInterval === undefined)
							connectOptions.keepAliveInterval = 60;

						if (connectOptions.mqttVersion > 4 || connectOptions.mqttVersion < 3) {
							throw new Error(
								format(ERROR.INVALID_ARGUMENT, [
									connectOptions.mqttVersion,
									'connectOptions.mqttVersion',
								]),
							);
						}

						if (connectOptions.mqttVersion === undefined) {
							connectOptions.mqttVersionExplicit = false;
							connectOptions.mqttVersion = 4;
						} else {
							connectOptions.mqttVersionExplicit = true;
						}

						//Check that if password is set, so is username
						if (
							connectOptions.password !== undefined &&
							connectOptions.userName === undefined
						)
							throw new Error(
								format(ERROR.INVALID_ARGUMENT, [
									connectOptions.password,
									'connectOptions.password',
								]),
							);

						if (connectOptions.willMessage) {
							if (!(connectOptions.willMessage instanceof Message))
								throw new Error(
									format(ERROR.INVALID_TYPE, [
										connectOptions.willMessage,
										'connectOptions.willMessage',
									]),
								);
							// The will message must have a payload that can be represented as a string.
							// Cause the willMessage to throw an exception if this is not the case.
							connectOptions.willMessage.stringPayload = null;

							if (typeof connectOptions.willMessage.destinationName === 'undefined')
								throw new Error(
									format(ERROR.INVALID_TYPE, [
										typeof connectOptions.willMessage.destinationName,
										'connectOptions.willMessage.destinationName',
									]),
								);
						}
						if (typeof connectOptions.cleanSession === 'undefined')
							connectOptions.cleanSession = true;
						if (connectOptions.hosts) {
							if (!(connectOptions.hosts instanceof Array))
								throw new Error(
									format(ERROR.INVALID_ARGUMENT, [
										connectOptions.hosts,
										'connectOptions.hosts',
									]),
								);
							if (connectOptions.hosts.length < 1)
								throw new Error(
									format(ERROR.INVALID_ARGUMENT, [
										connectOptions.hosts,
										'connectOptions.hosts',
									]),
								);

							var usingURIs = false;
							for (var i = 0; i < connectOptions.hosts.length; i++) {
								if (typeof connectOptions.hosts[i] !== 'string')
									throw new Error(
										format(ERROR.INVALID_TYPE, [
											typeof connectOptions.hosts[i],
											'connectOptions.hosts[' + i + ']',
										]),
									);
								if (
									/^(wss?):\/\/((\[(.+)\])|([^\/]+?))(:(\d+))?(\/.*)$/.test(
										connectOptions.hosts[i],
									)
								) {
									if (i === 0) {
										usingURIs = true;
									} else if (!usingURIs) {
										throw new Error(
											format(ERROR.INVALID_ARGUMENT, [
												connectOptions.hosts[i],
												'connectOptions.hosts[' + i + ']',
											]),
										);
									}
								} else if (usingURIs) {
									throw new Error(
										format(ERROR.INVALID_ARGUMENT, [
											connectOptions.hosts[i],
											'connectOptions.hosts[' + i + ']',
										]),
									);
								}
							}

							if (!usingURIs) {
								if (!connectOptions.ports)
									throw new Error(
										format(ERROR.INVALID_ARGUMENT, [
											connectOptions.ports,
											'connectOptions.ports',
										]),
									);
								if (!(connectOptions.ports instanceof Array))
									throw new Error(
										format(ERROR.INVALID_ARGUMENT, [
											connectOptions.ports,
											'connectOptions.ports',
										]),
									);
								if (connectOptions.hosts.length !== connectOptions.ports.length)
									throw new Error(
										format(ERROR.INVALID_ARGUMENT, [
											connectOptions.ports,
											'connectOptions.ports',
										]),
									);

								connectOptions.uris = [];

								for (var i = 0; i < connectOptions.hosts.length; i++) {
									if (
										typeof connectOptions.ports[i] !== 'number' ||
										connectOptions.ports[i] < 0
									)
										throw new Error(
											format(ERROR.INVALID_TYPE, [
												typeof connectOptions.ports[i],
												'connectOptions.ports[' + i + ']',
											]),
										);
									var host = connectOptions.hosts[i];
									var port = connectOptions.ports[i];

									var ipv6 = host.indexOf(':') !== -1;
									uri =
										'ws://' + (ipv6 ? '[' + host + ']' : host) + ':' + port + path;
									connectOptions.uris.push(uri);
								}
							} else {
								connectOptions.uris = connectOptions.hosts;
							}
						}

						client.connect(connectOptions);
					};

					/**
					 * Subscribe for messages, request receipt of a copy of messages sent to the destinations described by the filter.
					 *
					 * @name Paho.Client#subscribe
					 * @function
					 * @param {string} filter describing the destinations to receive messages from.
					 * <br>
					 * @param {object} subscribeOptions - used to control the subscription
					 *
					 * @param {number} subscribeOptions.qos - the maximum qos of any publications sent
					 *                                  as a result of making this subscription.
					 * @param {object} subscribeOptions.invocationContext - passed to the onSuccess callback
					 *                                  or onFailure callback.
					 * @param {function} subscribeOptions.onSuccess - called when the subscribe acknowledgement
					 *                                  has been received from the server.
					 *                                  A single response object parameter is passed to the onSuccess callback containing the following fields:
					 *                                  <ol>
					 *                                  <li>invocationContext if set in the subscribeOptions.
					 *                                  </ol>
					 * @param {function} subscribeOptions.onFailure - called when the subscribe request has failed or timed out.
					 *                                  A single response object parameter is passed to the onFailure callback containing the following fields:
					 *                                  <ol>
					 *                                  <li>invocationContext - if set in the subscribeOptions.
					 *                                  <li>errorCode - a number indicating the nature of the error.
					 *                                  <li>errorMessage - text describing the error.
					 *                                  </ol>
					 * @param {number} subscribeOptions.timeout - which, if present, determines the number of
					 *                                  seconds after which the onFailure calback is called.
					 *                                  The presence of a timeout does not prevent the onSuccess
					 *                                  callback from being called when the subscribe completes.
					 * @throws {InvalidState} if the client is not in connected state.
					 */
					this.subscribe = function (filter, subscribeOptions) {
						if (typeof filter !== 'string' && filter.constructor !== Array)
							throw new Error('Invalid argument:' + filter);
						subscribeOptions = subscribeOptions || {};
						validate(subscribeOptions, {
							qos: 'number',
							invocationContext: 'object',
							onSuccess: 'function',
							onFailure: 'function',
							timeout: 'number',
						});
						if (subscribeOptions.timeout && !subscribeOptions.onFailure)
							throw new Error(
								'subscribeOptions.timeout specified with no onFailure callback.',
							);
						if (
							typeof subscribeOptions.qos !== 'undefined' &&
							!(
								subscribeOptions.qos === 0 ||
								subscribeOptions.qos === 1 ||
								subscribeOptions.qos === 2
							)
						)
							throw new Error(
								format(ERROR.INVALID_ARGUMENT, [
									subscribeOptions.qos,
									'subscribeOptions.qos',
								]),
							);
						client.subscribe(filter, subscribeOptions);
					};

					/**
				 * Unsubscribe for messages, stop receiving messages sent to destinations described by the filter.
				 *
				 * @name Paho.Client#unsubscribe
				 * @function
				 * @param {string} filter - describing the destinations to receive messages from.
				 * @param {object} unsubscribeOptions - used to control the subscription
				 * @param {object} unsubscribeOptions.invocationContext - passed to the onSuccess callback
													  or onFailure callback.
				 * @param {function} unsubscribeOptions.onSuccess - called when the unsubscribe acknowledgement has been received from the server.
				 *                                    A single response object parameter is passed to the
				 *                                    onSuccess callback containing the following fields:
				 *                                    <ol>
				 *                                    <li>invocationContext - if set in the unsubscribeOptions.
				 *                                    </ol>
				 * @param {function} unsubscribeOptions.onFailure called when the unsubscribe request has failed or timed out.
				 *                                    A single response object parameter is passed to the onFailure callback containing the following fields:
				 *                                    <ol>
				 *                                    <li>invocationContext - if set in the unsubscribeOptions.
				 *                                    <li>errorCode - a number indicating the nature of the error.
				 *                                    <li>errorMessage - text describing the error.
				 *                                    </ol>
				 * @param {number} unsubscribeOptions.timeout - which, if present, determines the number of seconds
				 *                                    after which the onFailure callback is called. The presence of
				 *                                    a timeout does not prevent the onSuccess callback from being
				 *                                    called when the unsubscribe completes
				 * @throws {InvalidState} if the client is not in connected state.
				 */
					this.unsubscribe = function (filter, unsubscribeOptions) {
						if (typeof filter !== 'string' && filter.constructor !== Array)
							throw new Error('Invalid argument:' + filter);
						unsubscribeOptions = unsubscribeOptions || {};
						validate(unsubscribeOptions, {
							invocationContext: 'object',
							onSuccess: 'function',
							onFailure: 'function',
							timeout: 'number',
						});
						if (unsubscribeOptions.timeout && !unsubscribeOptions.onFailure)
							throw new Error(
								'unsubscribeOptions.timeout specified with no onFailure callback.',
							);
						client.unsubscribe(filter, unsubscribeOptions);
					};

					/**
					 * Send a message to the consumers of the destination in the Message.
					 *
					 * @name Paho.Client#send
					 * @function
					 * @param {string|Paho.Message} topic - <b>mandatory</b> The name of the destination to which the message is to be sent.
					 * 					   - If it is the only parameter, used as Paho.Message object.
					 * @param {String|ArrayBuffer} payload - The message data to be sent.
					 * @param {number} qos The Quality of Service used to deliver the message.
					 * 		<dl>
					 * 			<dt>0 Best effort (default).
					 *     			<dt>1 At least once.
					 *     			<dt>2 Exactly once.
					 * 		</dl>
					 * @param {Boolean} retained If true, the message is to be retained by the server and delivered
					 *                     to both current and future subscriptions.
					 *                     If false the server only delivers the message to current subscribers, this is the default for new Messages.
					 *                     A received message has the retained boolean set to true if the message was published
					 *                     with the retained boolean set to true
					 *                     and the subscrption was made after the message has been published.
					 * @throws {InvalidState} if the client is not connected.
					 */
					this.send = function (topic, payload, qos, retained) {
						var message;

						if (arguments.length === 0) {
							throw new Error('Invalid argument.' + 'length');
						} else if (arguments.length == 1) {
							if (!(topic instanceof Message) && typeof topic !== 'string')
								throw new Error('Invalid argument:' + typeof topic);

							message = topic;
							if (typeof message.destinationName === 'undefined')
								throw new Error(
									format(ERROR.INVALID_ARGUMENT, [
										message.destinationName,
										'Message.destinationName',
									]),
								);
							client.send(message);
						} else {
							//parameter checking in Message object
							message = new Message(payload);
							message.destinationName = topic;
							if (arguments.length >= 3) message.qos = qos;
							if (arguments.length >= 4) message.retained = retained;
							client.send(message);
						}
					};

					/**
					 * Publish a message to the consumers of the destination in the Message.
					 * Synonym for Paho.Mqtt.Client#send
					 *
					 * @name Paho.Client#publish
					 * @function
					 * @param {string|Paho.Message} topic - <b>mandatory</b> The name of the topic to which the message is to be published.
					 * 					   - If it is the only parameter, used as Paho.Message object.
					 * @param {String|ArrayBuffer} payload - The message data to be published.
					 * @param {number} qos The Quality of Service used to deliver the message.
					 * 		<dl>
					 * 			<dt>0 Best effort (default).
					 *     			<dt>1 At least once.
					 *     			<dt>2 Exactly once.
					 * 		</dl>
					 * @param {Boolean} retained If true, the message is to be retained by the server and delivered
					 *                     to both current and future subscriptions.
					 *                     If false the server only delivers the message to current subscribers, this is the default for new Messages.
					 *                     A received message has the retained boolean set to true if the message was published
					 *                     with the retained boolean set to true
					 *                     and the subscrption was made after the message has been published.
					 * @throws {InvalidState} if the client is not connected.
					 */
					this.publish = function (topic, payload, qos, retained) {
						var message;

						if (arguments.length === 0) {
							throw new Error('Invalid argument.' + 'length');
						} else if (arguments.length == 1) {
							if (!(topic instanceof Message) && typeof topic !== 'string')
								throw new Error('Invalid argument:' + typeof topic);

							message = topic;
							if (typeof message.destinationName === 'undefined')
								throw new Error(
									format(ERROR.INVALID_ARGUMENT, [
										message.destinationName,
										'Message.destinationName',
									]),
								);
							client.send(message);
						} else {
							//parameter checking in Message object
							message = new Message(payload);
							message.destinationName = topic;
							if (arguments.length >= 3) message.qos = qos;
							if (arguments.length >= 4) message.retained = retained;
							client.send(message);
						}
					};

					/**
					 * Normal disconnect of this Messaging client from its server.
					 *
					 * @name Paho.Client#disconnect
					 * @function
					 * @throws {InvalidState} if the client is already disconnected.
					 */
					this.disconnect = function () {
						client.disconnect();
					};

					/**
					 * Get the contents of the trace log.
					 *
					 * @name Paho.Client#getTraceLog
					 * @function
					 * @return {Object[]} tracebuffer containing the time ordered trace records.
					 */
					this.getTraceLog = function () {
						return client.getTraceLog();
					};

					/**
					 * Start tracing.
					 *
					 * @name Paho.Client#startTrace
					 * @function
					 */
					this.startTrace = function () {
						client.startTrace();
					};

					/**
					 * Stop tracing.
					 *
					 * @name Paho.Client#stopTrace
					 * @function
					 */
					this.stopTrace = function () {
						client.stopTrace();
					};

					this.isConnected = function () {
						return client.connected;
					};
				};

				/**
				 * An application message, sent or received.
				 * <p>
				 * All attributes may be null, which implies the default values.
				 *
				 * @name Paho.Message
				 * @constructor
				 * @param {String|ArrayBuffer} payload The message data to be sent.
				 * <p>
				 * @property {string} payloadString <i>read only</i> The payload as a string if the payload consists of valid UTF-8 characters.
				 * @property {ArrayBuffer} payloadBytes <i>read only</i> The payload as an ArrayBuffer.
				 * <p>
				 * @property {string} destinationName <b>mandatory</b> The name of the destination to which the message is to be sent
				 *                    (for messages about to be sent) or the name of the destination from which the message has been received.
				 *                    (for messages received by the onMessage function).
				 * <p>
				 * @property {number} qos The Quality of Service used to deliver the message.
				 * <dl>
				 *     <dt>0 Best effort (default).
				 *     <dt>1 At least once.
				 *     <dt>2 Exactly once.
				 * </dl>
				 * <p>
				 * @property {Boolean} retained If true, the message is to be retained by the server and delivered
				 *                     to both current and future subscriptions.
				 *                     If false the server only delivers the message to current subscribers, this is the default for new Messages.
				 *                     A received message has the retained boolean set to true if the message was published
				 *                     with the retained boolean set to true
				 *                     and the subscrption was made after the message has been published.
				 * <p>
				 * @property {Boolean} duplicate <i>read only</i> If true, this message might be a duplicate of one which has already been received.
				 *                     This is only set on messages received from the server.
				 *
				 */
				var Message = function (newPayload) {
					var payload;
					if (
						typeof newPayload === 'string' ||
						newPayload instanceof ArrayBuffer ||
						(ArrayBuffer.isView(newPayload) && !(newPayload instanceof DataView))
					) {
						payload = newPayload;
					} else {
						throw format(ERROR.INVALID_ARGUMENT, [newPayload, 'newPayload']);
					}

					var destinationName;
					var qos = 0;
					var retained = false;
					var duplicate = false;

					Object.defineProperties(this, {
						payloadString: {
							enumerable: true,
							get: function () {
								if (typeof payload === 'string') return payload;
								else return parseUTF8(payload, 0, payload.length);
							},
						},
						payloadBytes: {
							enumerable: true,
							get: function () {
								if (typeof payload === 'string') {
									var buffer = new ArrayBuffer(UTF8Length(payload));
									var byteStream = new Uint8Array(buffer);
									stringToUTF8(payload, byteStream, 0);

									return byteStream;
								} else {
									return payload;
								}
							},
						},
						destinationName: {
							enumerable: true,
							get: function () {
								return destinationName;
							},
							set: function (newDestinationName) {
								if (typeof newDestinationName === 'string')
									destinationName = newDestinationName;
								else
									throw new Error(
										format(ERROR.INVALID_ARGUMENT, [
											newDestinationName,
											'newDestinationName',
										]),
									);
							},
						},
						qos: {
							enumerable: true,
							get: function () {
								return qos;
							},
							set: function (newQos) {
								if (newQos === 0 || newQos === 1 || newQos === 2) qos = newQos;
								else throw new Error('Invalid argument:' + newQos);
							},
						},
						retained: {
							enumerable: true,
							get: function () {
								return retained;
							},
							set: function (newRetained) {
								if (typeof newRetained === 'boolean') retained = newRetained;
								else
									throw new Error(
										format(ERROR.INVALID_ARGUMENT, [newRetained, 'newRetained']),
									);
							},
						},
						topic: {
							enumerable: true,
							get: function () {
								return destinationName;
							},
							set: function (newTopic) {
								destinationName = newTopic;
							},
						},
						duplicate: {
							enumerable: true,
							get: function () {
								return duplicate;
							},
							set: function (newDuplicate) {
								duplicate = newDuplicate;
							},
						},
					});
				};

				// Module contents.
				return {
					Client: Client,
					Message: Message,
				};
				// eslint-disable-next-line no-nested-ternary
			})(
				typeof commonjsGlobal !== 'undefined'
					? commonjsGlobal
					: typeof self !== 'undefined'
						? self
						: typeof window !== 'undefined'
							? window
							: {},
			);
			return PahoMQTT;
		}); 
	} (pahoMqtt$1));
	return pahoMqtt$1.exports;
}

export { requirePahoMqtt as __require };
//# sourceMappingURL=paho-mqtt.mjs.map