"use strict";

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

var WebSocket = require("ws");
var dns = require("dns");
var udp = require("dgram");
var Lame = require("lame");
var Opus = require('node-opus');
var Wav = require('wav');
var fs = require("fs");

function VoicePacket(packet, sequence, timestamp, ssrc) {
	var audioBuffer = packet;
	var retBuff = new Buffer(audioBuffer.length + 12);
	retBuff.fill(0);
	retBuff[0] = 0x80;
	retBuff[1] = 0x78;
	retBuff.writeUIntBE(sequence, 2, 2);
	retBuff.writeUIntBE(timestamp, 4, 4);
	retBuff.writeUIntBE(ssrc, 8, 4);

	for (var i = 0; i < audioBuffer.length; i++) {
		retBuff[i + 12] = audioBuffer[i];
	}

	return retBuff;
}

var VoiceConnection = (function () {
	function VoiceConnection(channel, client, session, token, server, endpoint) {
		_classCallCheck(this, VoiceConnection);

		this.voiceChannel = channel;
		this.client = client;
		this.session = session;
		this.token = token;
		this.server = server;
		this.endpoint = endpoint.replace(":80", "");
		this.vWS = null; // vWS means voice websocket
		this.ready = false;
		this.vWSData = {};
		this.init();
	}

	VoiceConnection.prototype.test = function test() {
		var self = this;
		var startTime = Date.now();
		var cnt = 0;
		function sendAudio(sequence, timestamp, opusEncoder, wavOutput, udpClient, vWS) {
			cnt++;
			var buff = wavOutput.read(1920);
			if (buff && buff.length === 1920) {
				sequence + 20 < 65535 ? sequence += 1 : sequence = 0;
				timestamp + 9600 < 4294967295 ? timestamp += 960 : timestamp = 0;

				var encoded = opusEncoder.encode(buff, 1920);
				var audioPacket = VoicePacket(encoded, sequence, timestamp, self.vWSData.ssrc);

				var nextTime = startTime + cnt * 20;

				udpClient.send(audioPacket, 0, audioPacket.length, self.vWSData.port, self.endpoint, function (err) {});
				setTimeout(function () {
					sendAudio(sequence, timestamp, opusEncoder, wavOutput, udpClient, vWS);
				}, 20 + (nextTime - new Date().getTime()));
			} else {
				var speaking = {
					"op": 5,
					"d": {
						"speaking": false,
						"delay": 0
					}
				};
				vWS.send(JSON.stringify(speaking));
			}
		}

		var speaking = {
			"op": 5,
			"d": {
				"speaking": true,
				"delay": 0
			}
		};

		var vWS = self.vWS;
		var stream = fs.createReadStream("c:/users/amish/desktop/audio.wav");

		vWS.send(JSON.stringify(speaking));

		var rate = 48000;
		var opusEncoder = new Opus.OpusEncoder(48000, 1);
		var wavReader = new Wav.Reader();
		wavReader.on('format', function (format) {
			console.log(format);
		});
		var wavOutput = stream.pipe(wavReader);

		var sequence = 0;
		var timestamp = 0;

		wavOutput.on('readable', function () {
			console.log("readable!");
			sendAudio(sequence, timestamp, opusEncoder, wavOutput, self.udp, vWS);
		});
	};

	VoiceConnection.prototype.init = function init() {
		var _this = this;

		var self = this;
		dns.lookup(this.endpoint, function (err, address, family) {
			self.endpoint = address;
			var vWS = self.vWS = new WebSocket("wss://" + _this.endpoint, null, { rejectUnauthorized: false });
			var udpClient = self.udp = udp.createSocket("udp4");

			var firstPacket = true;

			var discordIP = "",
			    discordPort = "";

			udpClient.bind({ exclusive: true });
			udpClient.on('message', function (msg, rinfo) {
				var buffArr = JSON.parse(JSON.stringify(msg)).data;
				if (firstPacket === true) {
					for (var i = 4; i < buffArr.indexOf(0, i); i++) {
						discordIP += String.fromCharCode(buffArr[i]);
					}
					discordPort = msg.readUIntLE(msg.length - 2, 2).toString(10);

					var wsDiscPayload = {
						"op": 1,
						"d": {
							"protocol": "udp",
							"data": {
								"address": discordIP,
								"port": Number(discordPort),
								"mode": self.vWSData.modes[0] //Plain
							}
						}
					};
					console.log("success!!!");
					vWS.send(JSON.stringify(wsDiscPayload));
					firstPacket = false;
				}
			});

			vWS.on("open", function () {
				vWS.send(JSON.stringify({
					op: 0,
					d: {
						server_id: self.server.id,
						user_id: self.client.internal.user.id,
						session_id: self.session,
						token: self.token
					}
				}));
			});

			var KAI;

			vWS.on("message", function (msg) {
				var data = JSON.parse(msg);
				switch (data.op) {
					case 2:
						self.vWSData = data.d;

						KAI = setInterval(function () {
							vWS.send(JSON.stringify({
								op: 3,
								d: null
							}));
						}, data.d.heartbeat_interval);

						var udpPacket = new Buffer(70);
						udpPacket.writeUIntBE(data.d.ssrc, 0, 4);
						udpClient.send(udpPacket, 0, udpPacket.length, data.d.port, self.endpoint, function (err) {
							console.log("err", err);
						});
						break;
					case 4:

						self.ready = true;
						self.mode = data.d.mode;
						console.log("ready!!!");

						self.test();

						break;
				}
			});
		});
	};

	return VoiceConnection;
})();

module.exports = VoiceConnection;