const fs = require('fs-extra');
const Tail = require('tail').Tail;
const https = require('follow-redirects').https;
const needle = require("needle");
const child_process = require('child_process');
const path = require('path');
const syncRequest = require('sync-request');
const request = require("request");
const ncp = require('ncp').ncp;
const Rcon = require('rcon-client-fork').Rcon;
const deepmerge = require("deepmerge");
const getMac = require('getmac').getMac;
const rmdirSync = require('rmdir-sync');
const ioClient = require("socket.io-client");
const asTable = require("as-table").configure({delimiter: ' | '});
const util = require("util");
const crypto = require("crypto");

// internal libraries
const objectOps = require("lib/objectOps.js");
const fileOps = require("lib/fileOps");
const stringUtils = require("lib/stringUtils.js");
const pluginManager = require("lib/manager/pluginManager");
const modManager = require("lib/manager/modManager");
const hashFile = require('lib/hash').hashFile;

// Uhm...
var global = {};

/**
 * Keeps track of the runtime parameters of an instance
 */
class Instance {
	constructor(dir, name) {
		this._name = name;
		this._dir = dir;
	}

	/**
	 * Name of the instance
	 *
	 * This should not be used for filesystem paths.  See .path() for that.
	 */
	get name() {
		return this._name;
	}

	/**
	 * Return path in instance
	 *
	 * Creates a path using path.join with the given parts that's relative to
	 * the directory of the instance.  For example instance.path("mods")
	 * returns a path to the mods directory of the instance.  If no parts are
	 * given it returns a path to the directory of the instance.
	 */
	path(...parts) {
		return path.join(this._dir, ...parts);
	}
}

function checkFilename(name) {
	// All of these are bad in Windows only, except for /, . and ..
	// See: https://docs.microsoft.com/en-us/windows/win32/fileio/naming-a-file
	const badChars = /[<>:"\/\\|?*\x00-\x1f]/g;
	const badEnd = /[. ]$/;

	const oneToNine = [1, 2, 3, 4, 5, 6, 7, 8, 9];
	const badNames = [
		// Relative path components
		'.', '..',

		// Reserved filenames in Windows
		'CON', 'PRN', 'AUX', 'NUL',
		...oneToNine.map(n => `COM${n}`),
		...oneToNine.map(n => `LPT${n}`),
	];

	if (typeof name !== "string") {
		throw new Error("must be a string");
	}

	if (name === "") {
		throw new Error("cannot be empty");
	}

	if (badChars.test(name)) {
		throw new Error('cannot contain <>:"\\/|=* or control characters');
	}

	if (badNames.includes(name.toUpperCase())) {
		throw new Error(
			"cannot be named any of . .. CON PRN AUX NUL COM1-9 and LPT1-9"
		);
	}

	if (badEnd.test(name)) {
		throw new Error("cannot end with . or space");
	}
}

function needleOptionsWithTokenAuthHeader(config) {
	return {
		compressed: true,
		headers: {
			'x-access-token': config.masterAuthToken
		},
	};
}


var instanceInfo = {};
var commandBuffer=[];

// function to handle sending commands into the game
async function messageInterfaceInternal(command, callback, resolve, reject) {
	// try to save us if you send a buffer instead of string
	if(typeof command == "object") {
		command = command.toString('utf8');
	}
	
	if(false && process.platform == "linux" && typeof command == "string" && serverprocess) {
		/*
			to send to stdin, use:
			serverprocess.stdin.write("/c command;\n")
		*/
		serverprocess.stdin.write(command+"\n");
		if(typeof callback == "function"){
			callback();
		}
		resolve();
	} else if(typeof command == "string" && client && client.send && typeof client.send == "function") {
		try {
			let str = await client.send(command+"\n");
			if(typeof callback == "function") callback(str)
			resolve(str)
		} catch (err) {
			console.log("RCON failed, server might be paused or shutting down");
			// console.log(err);
			// reject(err);
			if(typeof callback == "function"){
				callback();
			}
			reject(err)
		}
	}
}
function messageInterface(command, callback) {
	return new Promise((resolve,reject) => {
		commandBuffer.push([command,callback, resolve, reject]);
	});
}

/**
 * Give a random dynamic port
 *
 * Returns a random port number in the Dynamic Ports range as defined by
 * RFC 6335.
 *
 * @return {number} a number in the range 49152 to 65535.
 */
function randomDynamicPort() {
	const start = 49152;
	const end = 65535 + 1;

	return Math.floor(Math.random() * (end - start) + start)
}

/**
 * Generate a secure random password of the given length
 *
 * Uses crypto.randomBytes to generate a secure alphanumeric password of
 * the given length.
 *
 * @param {number} length - the length of the password to generate.
 * @return {string} password of the given length
 */
async function generatePassword(length) {
	function validChar(byte) {
		const ranges = ['az', 'AZ', '09'];
		return ranges.some(range =>
			range.codePointAt(0) <= byte && byte <= range.codePointAt(1)
		);
	}
	let randomBytesAsync = util.promisify(crypto.randomBytes);

	let password = "";
	while (true) {
		let bytes = await randomBytesAsync((length - password.length) * 3);
		for (let byte of bytes) {

			// Crop to ASCII values only
			byte = byte & 0x7f;

			if (validChar(byte)) {
				password += String.fromCharCode(byte);
				if (password.length == length) {
					return password;
				}
			}
		}
	}
}

function printUsage() {
	console.error("Usage: ");
	console.error("node client.js start [instance name]");
	console.error("node client.js list");
	console.error("node client.js delete [instance]");
	console.error("To download the latest version of the Clusterio lua mod, do");
	console.error("node client.js manage shared mods download clusterio");
	console.error("To download a clusterio plugin, do");
	console.error("node client.js manage shared plugins install https://github.com/Danielv123/playerManager");
	console.error("For more management options, do");
	console.error("node client.js manage");
}

async function listInstances(config) {
	let instanceNames = fileOps.getDirectoriesSync(config.instanceDirectory);
	let instances = [];
	for (instance of instanceNames) {
		let cfg = path.resolve(config.instanceDirectory, instance, 'config');
		let port = require(cfg).factorioPort;
		instances.push({
			"Name": instance,
			"Port": port.toString(),
		});
	}

	console.log(asTable(instances));
}

async function manage(config, instance) {
	// console.log("Launching mod manager");
	//const fullUsage = 'node client.js manage [instance, "shared"] ["mods", "config"] ...';
	function usage(instance, tool, action){
		if(tool && tool == "mods"){
			console.log('node client.js manage '+instance.name+' '+tool+' ["list", "search", "add", "remove"]');
		} else if(tool && tool == "plugins") {
			console.log(`node client.js manage ${instance.name} ${tool} ["list", "add", "remove"]`);
		} else {
			console.log('node client.js manage '+(instance && instance.name || '[instance, "shared"]') +' '+ (tool || '["mods", "plugins"]') + ' ...');
		}
	}
	const tool = process.argv[4] || "";
	const action = process.argv[5] || "";
	if (instance !== undefined) {
		if(tool == "mods"){
			(async function(){try{
				// allow managing mods
				if(action == "list"){
					console.log(await modManager.listMods(config, instance));
				} else if(action == "search"){
					console.log(await modManager.findMods(config, process.argv[6]));
				} else if(action == "add" || action == "download"){
					await modManager.addMod(config, process.argv[6], instance);
				} else if(action == "remove" || action == "rm" || action == "delete"){
					await modManager.removeMod(config, process.argv[6], instance);
				} else {
					usage(instance, tool);
				}
				process.exit(0);
			}catch(e){
				console.log("Got error from modManager:")
				console.log(e);
			}})();
		} else if(tool == "plugins"){
			(async function(){try{
				if(action == "list"){
					await pluginManager.listPlugins();
				} else if(action == "add" || action == "install" || action == "download"){
					let status = await pluginManager.addPlugin(process.argv[6]);
				} else if(action == "remove" || action == "uninstall" || action == "delete"){
					let status = await pluginManager.removePlugin(process.argv[6]);
					if(status && status.msg) console.log(status.msg);
				} else if(action == "enable"){
					let status = await pluginManager.enablePlugin(process.argv[6]);
					if(status && status.msg) console.log(status.msg);
				} else if(action == "disable"){
					let status = await pluginManager.disablePlugin(process.argv[6]);
					if(status && status.msg) console.log(status.msg);
				}
				process.exit(0);
			}catch(e){
				console.error(e);
				process.exit(1);
			}})();
		} else {
			usage(instance);
		}
	} else {
		console.log('Usage:');
		usage(instance);
	}
}

async function deleteInstance(instance) {
	if (instance === undefined) {
		console.error("Usage: node client.js delete [instance]");
		process.exit(1);
	} else if (fs.existsSync(instance.path())) {
		fileOps.deleteFolderRecursiveSync(instance.path()); // TODO: Check if this can cause i-craft users to format their server by using wrong paths
		console.log("Deleted instance " + instance.name);
		process.exit(0);
	} else {
		console.error("Instance not found: " + instance.name);
		process.exit(0);
	}
}

async function downloadMod() {
	console.log("Downloading mods...");
	// get JSON data about releases
	let res = syncRequest('GET', 'https://api.github.com/repos/Danielv123/factorioClusterioMod/releases', {"headers":{"User-Agent":"factorioClusterio"}});
	let url = JSON.parse(res.getBody())[0].assets[0].browser_download_url;
	let name = JSON.parse(res.getBody())[0].assets[0].name;
	if(url) {
		console.log(url);
		let file = fs.createWriteStream("sharedMods/"+name);
		https.get(url, function(response) {
			response.on('end', function () {
				console.log("Downloaded "+name);
				process.exit(0);
			});
			response.pipe(file);
		}).end();
	}
}

async function createInstance(config, args, instance) {
	// if instance does not exist, create it
	console.log("Creating instance...");
	fs.mkdirSync(instance.path());
	fs.mkdirSync(instance.path("script-output"));
	fs.writeFileSync(instance.path("script-output", "output.txt"), "");
	fs.writeFileSync(instance.path("script-output", "orders.txt"), "");
	fs.writeFileSync(instance.path("script-output", "txbuffer.txt"), "");
	fs.mkdirSync(instance.path("mods"));
	fs.mkdirSync(instance.path("instanceMods"));
    fs.mkdirSync(instance.path("scenarios"));
    ncp("lib/scenarios", instance.path("scenarios"), err => {
        if (err) console.error(err)
    });

	// fs.symlinkSync('../../../sharedMods', instance.path("mods"), 'junction') // This is broken because it can only take a file as first argument, not a folder
	fs.writeFileSync(instance.path("config.ini"), `[path]\r\n
read-data=${ path.resolve(config.factorioDirectory, "data") }\r\n
write-data=${ instance.path() }\r\n
	`);

	// this line is probably not needed anymore but Im not gonna remove it
	fs.copySync('sharedMods', instance.path("mods"));
	let instconf = {
		"factorioPort": args.port || process.env.FACTORIOPORT || randomDynamicPort(),
		"clientPort": args["rcon-port"] || process.env.RCONPORT || randomDynamicPort(),
		"__comment_clientPassword": "This is the rcon password. Its also used for making an instanceID. Make sure its unique and not blank.",
		"clientPassword": args["rcon-password"] || await generatePassword(10),
		"info": {}
	}
	console.log("Clusterio | Created instance with settings:")
	console.log(instconf);

	// create instance config
	fs.writeFileSync(instance.path("config.json"), JSON.stringify(instconf, null, 4));

	let name = "Clusterio instance: " + instance.name;
	if (config.username) {
		name = config.username + "'s clusterio " + instance.name;
	}
	let serversettings = {
		"name": name,
		"description": config.description,
		"tags": ["clusterio"],
		"max_players": "20",
		"visibility": config.visibility,
		"username": config.username,
		"token": config.token,
		"game_password": config.game_password,
		"verify_user_identity": config.verify_user_identity,
		"admins": [config.username],
		"allow_commands": config.allow_commands,
		"autosave_interval": 10,
		"autosave_slots": 5,
		"afk_autokick_interval": 0,
		"auto_pause": config.auto_pause,
	};
	fs.writeFileSync(instance.path("server-settings.json"), JSON.stringify(serversettings, null, 4));
    console.log("Server settings: "+JSON.stringify(serversettings, null, 4));
    console.log("Creating save .....");
    let factorio = child_process.spawn(
        './' + config.factorioDirectory + '/bin/x64/factorio', [
            '-c', instance.path("config.ini"),
            // '--create', instance.path("saves", "save.zip"),
            '--start-server-load-scenario', 'Hotpatch',
            '--server-settings', instance.path("server-settings.json"),
            '--rcon-port', Number(process.env.RCONPORT) || instconf.clientPort,
            '--rcon-password', instconf.clientPassword,
        ], {
			'stdio': ['pipe', 'pipe', 'pipe'],
			'detached': process.platform === "linux",
        }
    );
    factorio.stdout.on("data", data => {
        data = data.toString("utf8").replace(/(\r\n\t|\n|\r\t)/gm,"");
        console.log(data);
        if(data.includes("Starting RCON interface")){
            let client = new Rcon({
				packetResponseTimeout: 200000,
			    maxPending: 5
			});
            client.connect({
                host: 'localhost',
                port: Number(process.env.RCONPORT) || instconf.clientPort,
                password: instconf.clientPassword
            });
            client.onDidAuthenticate(() => {
                console.log('Clusterio | RCON Authenticated!');
            });
            client.onDidConnect(() => {
                console.log('Clusterio | RCON Connected, starting save');
                client.send("/c game.server_save('hotpachSave')");
            });
        }
        if(data.includes("Saving finished")){
            console.log("Map saved as hotpachSave.zip, exiting...");
            console.log("Instance created!")
            process.exit(0);
        }
		if(data.includes("Downloading from auth server failed")){
			console.error("Instance creation failed, unable to establish auth server connection.");
			console.error("Deleting broken instance...");
			
			fileOps.deleteFolderRecursiveSync(path.resolve(config.instanceDirectory, process.argv[3]));
			
			process.exit(0);
		}
	});
}

async function startInstance(config, args, instance) {
	var instanceconfig = JSON.parse(await fs.readFile(instance.path("config.json")));
	instanceconfig.unique = stringUtils.hashCode(instanceconfig.clientPassword);
	if (process.env.FACTORIOPORT) {
		instanceconfig.factorioPort = process.env.FACTORIOPORT;
	}
	if (process.env.RCONPORT) {
		instanceconfig.rconPort = process.env.RCONPORT;
	}
	console.log("Deleting .tmp.zip files");
	let savefiles = fs.readdirSync(instance.path("saves"));
	for(i = 0; i < savefiles.length; i++){
		if(savefiles[i].substr(savefiles[i].length - 8, 8) == ".tmp.zip") {
			fs.unlinkSync(instance.path("saves", savefiles[i]));
		}
	}
	console.log("Clusterio | Rotating old logs...");
	// clean old log file to avoid crash
	try{
		let logPath = instance.path("factorio-current.log");
		let stat = await fs.stat(logPath);
		console.log(stat)
		console.log(stat.isFile())
		if(stat.isFile()){
			let logFilename = `factorio-${Math.floor(Date.parse(stat.mtime)/1000)}.log`;
			await fs.rename(logPath, instance.path(logFilename));
			console.log(`Log rotated as ${logFilename}`);
		}
	}catch(e){}
	// Math.floor(Date.now()/1000)
	// (new Date).toGMTString()
	
	// move mods from ./sharedMods to the instances mod directory
	try{fs.mkdirSync(instance.path("instanceMods"));}catch(e){}
	try{rmdirSync(instance.path("mods"));}catch(e){}
	try {
		// mods directory that will be emptied (deleted) when closing the server to facilitate seperation of instanceMods and sharedMods
		fs.mkdirSync(instance.path("mods"));
	} catch(e){}
	console.log("Clusterio | Moving shared mods from sharedMods/ to instance/mods...");
	fs.copySync('sharedMods', instance.path("mods"));
	console.log("Clusterio | Moving instance specific mods from instance/instanceMods to instance/mods...");
	fs.copySync(instance.path("instanceMods"), instance.path("mods"));
	
	// Set paths for factorio so it reads and writes from the correct place even if the instance is imported from somewhere else
	fs.writeFileSync(instance.path("config.ini"), `[path]\r\n
read-data=${ path.resolve(config.factorioDirectory, "data") }\r\n
write-data=${ instance.path() }\r\n
	`);
	
	// Spawn factorio server
	//var serverprocess = child_process.exec(commandline);
	fileOps.getNewestFile(instance.path("saves"), fs.readdirSync(instance.path("saves")),function(err, latestSave) {
		if(err) {
			console.error("ERROR!");
			console.error("Your savefile seems to be missing. This might because you created an instance without having factorio\
 installed and configured properly. Try installing factorio and adding your savefile to instances/[instancename]/saves/\n");
			throw err;
		}
		// implicit global
		serverprocess = child_process.spawn(
			'./' + config.factorioDirectory + '/bin/x64/factorio', [
				'-c', instance.path("config.ini"),
				'--start-server', latestSave.file,
				'--rcon-port', args["rcon-port"] || Number(process.env.RCONPORT) || instanceconfig.clientPort,
				'--rcon-password', args["rcon-password"] || instanceconfig.clientPassword,
				'--server-settings', instance.path("server-settings.json"),
				'--port', args.port || Number(process.env.FACTORIOPORT) || instanceconfig.factorioPort
			], {
				'stdio': ['pipe', 'pipe', 'pipe'],
				'detached': process.platform === "linux",
			}
		);

		serverprocess.on('close', code => {
			console.log(`child process exited with code ${code}`);
			process.exit();
		});
		serverprocess.stdout.on("data", data => {
			// log("Stdout: " + data);
			if(data.toString('utf8').includes("Couldn't parse RCON data: Maximum payload size exceeded")){
				console.error("ERROR: RCON CONNECTION BROKE DUE TO TOO LARGE PACKET!");
				console.error("Attempting reconnect...");
				client.disconnect();
				client.connect();
			}
			// we have to do this to make logs visible on linux and in powershell. Causes log duplication for people with CMD.
			console.log('Fact: ' + data.toString("utf8").replace("\n", ""));
		});
		serverprocess.stderr.on('data', (chunk) => {
			console.log('ERR: ' + chunk);
		});

		// connect to the server with rcon
		if(true || process.platform != "linux"){
			// IP, port, password
			client = new Rcon({
				packetResponseTimeout: 200000, // 200s, should allow for commands up to 1250kB in length
			    maxPending: 5
			});
			// check the logfile to see if the RCON interface is running as there is no way to continue without it
			// we read the log every 2 seconds and stop looping when we start connecting to factorio
			function checkRcon() {
				fs.readFile(instance.path("factorio-current.log"), function (err, data) {
					// if (err) console.error(err);
					if(data && data.indexOf('Starting RCON interface') > 0){
						client.connect({
							host: 'localhost',
							port: args["rcon-port"] || Number(process.env.RCONPORT) || instanceconfig.clientPort,
							password: args["rcon-password"] || instanceconfig.clientPassword,
						});
					} else {
						setTimeout(function(){
							checkRcon();
						},5000);
					}
				});
			}
			setTimeout(checkRcon, 5000);
		
			client.onDidAuthenticate(() => {
				console.log('Clusterio | RCON Authenticated!');
				instanceManagement(config, instance, instanceconfig); // start using rcons
			});
			client.onDidConnect(() => {
				console.log('Clusterio | RCON Connected!');
				// getID();
			});
			client.onDidDisconnect(() => {
				console.log('Clusterio | RCON Disconnected!');
				// process.exit(0); // exit because RCON disconnecting is undefined behaviour and we rather just wanna restart now
			});
			process.on('SIGINT', function () {
				console.log("Caught interrupt signal, disconnecting RCON");
				client.disconnect().then(()=>{
					console.log("Rcon disconnected, Sending ^C");
					// We don't actually do this on windows, because ctrl+c in windows CMD sends it to all subprocesses as well. Doing it twice will abort factorios save.
					if(process.platform == "linux"){
						serverprocess.kill("SIGINT");
					}
				});
			});
		} else if(process.platform == "linux"){
			// don't open an RCON connection and just use stdio instead, does not work on windows.
			instanceManagement(config, instance, instanceconfig);
			process.on('SIGINT', function () {
				console.log("Caught interrupt signal, sending ^C");
				serverprocess.kill("SIGINT");
			});
		}

		// set some globals
		confirmedOrders = [];
		lastSignalCheck = Date.now();
	});
}

async function startClient() {
	// argument parsing
	const args = require('minimist')(process.argv.slice(2));

	const command = process.argv[2];

	// add better stack traces on promise rejection
	process.on('unhandledRejection', r => console.log(r));

	console.log(`Requiring config from ${args.config || './config'}`);
	const config = require(args.config || './config');

	await fs.ensureDir(config.instanceDirectory);
	await fs.ensureDir("sharedPlugins");
	await fs.ensureDir("sharedMods");

	let instance;
	if (process.argv[3] !== undefined) {
		let name = process.argv[3];
		try {
			checkFilename(name);
		} catch (err) {
			throw new Error(`Instance name ${err.message}`);
		}
		let dir = path.join(config.instanceDirectory, name);
		instance = new Instance(dir, name);
	}

	// Set the process title, shows up as the title of the CMD window on windows
	// and as the process name in ps/top on linux.
	if (instance) {
		process.title = "clusterioClient "+instance.name;
	}


	// make sure we have the master access token (can't write to master without it since clusterio 2.0)
	if(!config.masterAuthToken || typeof config.masterAuthToken !== "string"){
		console.error("ERROR invalid config!");
		console.error(
			"Master server now needs an access token for write operations. As clusterio\n"+
			"slaves depends upon this, please add your token to config.json in the field\n"+
			"named masterAuthToken.  You can retrieve your auth token from the master in\n"+
			"secret-api-token.txt after running it once."
		);
		process.exitCode = 1;
		return;
	}

	// messageInterface Management
	setInterval(function(){
		let command=commandBuffer.shift();
		if(command){
			messageInterfaceInternal(command[0], command[1], command[2], command[3]);
		}
	},config.msBetweenCommands || 50);

	// handle commandline parameters
	if (!command || command == "help" || command == "--help") {
		printUsage();
		process.exit(1);
	} else if (command == "list") {
		await listInstances(config);
		process.exit(0);
	} else if (command == "manage"){
		await manage(config, instance);
		// process.exit(0);
	} else if (command == "delete") {
		await deleteInstance(instance);
	} else if (command == "download") {
		await downloadMod();
	} else if (command == "start" && instance === undefined) {
		console.error("ERROR: No instanceName provided!");
		console.error("Usage: node client.js start [instanceName]");
		process.exit(0);
	} else if (command == "start" && !fs.existsSync(instance.path())) {
		await createInstance(config, args, instance);
	} else if (command == "start" && fs.existsSync(instance.path())) {
		await startInstance(config, args, instance);
	} else {
		console.error("Invalid arguments, quitting.");
		process.exit(1);
	}
}

// ensure instancemanagement only ever runs once
var _instanceInitialized;
async function instanceManagement(config, instance, instanceconfig) {
	if (_instanceInitialized) return;
	_instanceInitialized = true;

    console.log("Started instanceManagement();");

    /* Open websocket connection to master */
	var socket = ioClient(config.masterURL+"?token="+config.masterAuthToken);
	socket.on("error", err => {
		console.log("SOCKET | Error: ", err);
	});
	socket.on("hello", data => {
		console.log("SOCKET | registering slave!");
		socket.emit("registerSlave", {
			instanceID: instanceconfig.unique,
		});
	});
	setInterval(B=> socket.emit("heartbeat"), 10000);

	// load plugins and execute onLoad event
	let pluginsToLoad = await pluginManager.getPlugins();
	let plugins = [];
	
	for(let i = 0; i < pluginsToLoad.length; i++){
		let pluginLoadStarted = Date.now();
		let combinedConfig = deepmerge(instanceconfig,config,{clone:true});
		combinedConfig.instanceName = instance.name;
		let pluginConfig = pluginsToLoad[i];
		
		if(!global.subscribedFiles) {
			global.subscribedFiles = {};
		}
		if(pluginConfig.binary == "nodePackage" && pluginConfig.enabled){
			// require plugin class and execute it
			let pluginClass = require(path.resolve(pluginConfig.pluginPath, "index.js"));
			plugins[i] = new pluginClass(combinedConfig, async function(data, callback){
				if(data && data.toString('utf8')[0] != "/") {
                    console.log("Clusterio | "+ pluginsToLoad[i].name + " | " + data.toString('utf8'));
					return true;
				} else if (data && data.toString('utf8')[0] == "/"){
					return messageInterface(data.toString('utf8'), callback);
				}
			}, { // extra functions to pass in object. Should have done it like this from the start, but won't break backwards compat.
				socket, // socket.io connection to master (and ES6 destructuring, yay)
			});
			if(plugins[i].factorioOutput && typeof plugins[i].factorioOutput === "function"){
				// when factorio logs a line, send it to the plugin. This includes things like autosaves, chat, errors etc
				serverprocess.stdout.on("data", data => plugins[i].factorioOutput(data.toString()));
			}
			if(pluginConfig.scriptOutputFileSubscription && typeof pluginConfig.scriptOutputFileSubscription == "string"){
				if(global.subscribedFiles[pluginConfig.scriptOutputFileSubscription]) {
					// please choose a unique file to subscribe to. If you need plugins to share this interface, set up a direct communication
					// between those plugins instead.
					throw "FATAL ERROR IN " + pluginConfig.name + " FILE ALREADY SUBSCRIBED " + pluginConfig.scriptOutputFileSubscription;
				}
				
				let outputPath = instance.path(
					"script-output",
					pluginConfig.scriptOutputFileSubscription
				);
				if (!fs.existsSync(outputPath)) {
					// Do something
					fs.writeFileSync(outputPath, "");
				}
				global.subscribedFiles[pluginConfig.scriptOutputFileSubscription] = true;
				console.log("Clusterio | Registered file subscription on "+outputPath);
				

				if(!pluginConfig.fileReadDelay || pluginConfig.fileReadDelay == 0) {
					// only wipe the file on restart for now, should most likely be rotated during runtime too
                    fs.writeFileSync(outputPath, "");
                    let tail = new Tail(outputPath);
                    tail.on("line", function (data) {
                        plugins[i].scriptOutput(data);
                    });
                } else {
                    fs.watch(outputPath, fileChangeHandler);
                    // run once in case a plugin wrote out information before the plugin loaded fully
                    // delay, so the socket got enough time to connect
                    setTimeout(() => {
                        fileChangeHandler(false, pluginConfig.scriptOutputFileSubscription);
                    }, 500);

                    // send file contents to plugin for processing
                    function fileChangeHandler(eventType, filename) {
                        if (filename != null) {
                            setTimeout(
                                () => {
                                    // get array of lines in file
                                    let stuff = fs.readFileSync(instance.path("script-output", filename), "utf8").split("\n");

                                    // if you found anything, reset the file
                                    if (stuff[0]) {
                                        fs.writeFileSync(instance.path("script-output", filename), "");
                                    }
                                    for (let o = 0; o < stuff.length; o++) {
                                        if (stuff[o] && !stuff[o].includes('\u0000\u0000')) {
                                            try {
                                                plugins[i].scriptOutput(stuff[o]);
                                            } catch (e) {
                                                console.error(e)
                                            }
                                        }
                                    }
                                },
                                pluginConfig.fileReadDelay || 0
                            );
                        }
                    }
                }
            }
			console.log(`Clusterio | Loaded plugin ${pluginsToLoad[i].name} in ${Date.now() - pluginLoadStarted}ms`);
		} else {
			// this plugin doesn't have a client portion. Maybe it runs on the master only?
		}
	}

	// world IDs ------------------------------------------------------------------
	hashMods(instance, function(modHashes){
		setInterval(getID, 10000);
		getID();
		function getID() {
			messageInterface("/silent-command rcon.print(#game.connected_players)", function(playerCount) {
				var payload = {
					time: Date.now(),
					rconPort: instanceconfig.clientPort,
					rconPassword: instanceconfig.clientPassword,
					serverPort: instanceconfig.factorioPort,
					unique: instanceconfig.unique,
					publicIP: config.publicIP, // IP of the server should be global for all instances, so we pull that straight from the config
					mods:modHashes,
					instanceName: instance.name,
					info: instanceconfig.info,
				};
				if(playerCount){
					payload.playerCount = playerCount.replace(/(\r\n\t|\n|\r\t)/gm, "");
				} else {
					payload.playerCount = 0;
				}
				
				function callback(err, mac) {
					if (err) {
						mac = "unknown";
						console.log("##### getMac crashed, but we don't really give a shit because we are probably closing down #####");
					}
					global.mac = mac;
					payload.mac = mac;
					// console.log("Registered our presence with master "+config.masterURL+" at " + payload.time);
					needle.post(config.masterURL + '/api/getID', payload, needleOptionsWithTokenAuthHeader(config), function (err, response, body) {
						if (err && err.code != "ECONNRESET"){
                            console.error("We got problems, something went wrong when contacting master "+config.masterURL+" at " + payload.time);
							console.error(err);
						} else if (response && response.body) {
							// In the future we might be interested in whether or not we actually manage to send it, but honestly I don't care.
							if(response.body !== "ok") {
                                console.log("Got no \"ok\" while registering our precense with master "+config.masterURL+" at " + payload.time);
                                console.log(response.body);
                            }
						}
					});
				}
				if(global.mac){
					callback(undefined, global.mac);
				} else {
					getMac(callback);
				}
			});
		}
	});
	// Mod uploading and management -----------------------------------------------
	// get mod names and hashes
	// string: instance, function: callback
	
	setTimeout(function(){hashMods(instance, uploadMods)}, 5000);
	function uploadMods(modHashes) {
		// [{modName:string,hash:string}, ... ]
		for(let i=0;i<modHashes.length;i++){
			let payload = {
				modName: modHashes[i].modName,
				hash: modHashes[i].hash,
			};
			needle.post(config.masterURL + '/api/checkMod', payload, needleOptionsWithTokenAuthHeader(config), function (err, response, body) {
				if(err) console.error("Unable to contact master server /api/checkMod! Please check your config.json.");
				if(response && body && body == "found") {
					console.log("master has mod "+modHashes[i].modName);
				} else if (response && body && typeof body == "string") {
					let mod = response.body;
					if(config.uploadModsToMaster){
						console.log("Sending mod: " + mod);
						// Send mods master says it wants
						// response.body is a string which is a modName.zip
						var req = request.post({url: config.masterURL + '/api/uploadMod',
							headers: {
								"x-access-token": config.masterAuthToken,
							},
						}, function (err, resp, body) {
							if (err) {
								console.error(new Error("Unable to contact master server /api/uploadMod! Please check your config.json."));
							} else {
								console.log('URL: ' + body);
							}
						});
						var form = req.form();
						form.append('file', fs.createReadStream(instance.path("mods", mod)));
					} else {
						console.log("Not sending mod: " + mod + " to master because config.uploadModsToMaster is not enabled")
					}
				}
			});
		}
	}
} // END OF INSTANCE START ---------------------------------------------------------------------

// string, function
// returns [{modName:string,hash:string}, ... ]
function hashMods(instance, callback) {
	if(!callback) {
		throw new Error("ERROR in function hashMods NO CALLBACK");
	}

	function hashMod(name) {
		if (path.extname(name) != ".zip") {
			// Can't hash unzipped mods, return null that's filtered out later
			return null;
		} else {
			return hashFile(instance.path("mods", name)).then(hash => (
				{modName: name, hash: hash}
			));
		}
	}

	let promises = fs.readdirSync(instance.path("mods")).map(hashMod);
	Promise.all(promises).then(hashes => {
		// Remove null entries from hashMod
		callback(hashes.filter(entry => entry !== null));
	});
}

module.exports = {
	// For testing only
	_Instance: Instance,
	_checkFilename: checkFilename,
	_randomDynamicPort: randomDynamicPort,
	_generatePassword: generatePassword,
};

if (module === require.main) {
	console.warn(`
+==========================================================+
I WARNING:  This is the development branch for the 2.0     I
I           version of clusterio.  Expect things to break. I
+==========================================================+
`
	);
	startClient().catch(err => {
		console.error(`
+---------------------------------------------------------------+
| Unexpected error occured while starting client, please report |
| it to https://github.com/clusterio/factorioClusterio/issues   |
+---------------------------------------------------------------+`
		);

		console.error(err);
		process.exit(1);
	});
}