exports.id = 'mqtt_subscribe_temperature';
exports.title = 'MQTT subscribe temperature';
exports.group = 'MQTT';
exports.color = '#888600';
exports.version = '1.0.2';
exports.icon = 'sign-out';
exports.output = 2;
exports.options = { host: 'tb-stage.worksys.io', port: 1883, tbname: "", username: "" };
exports.npm = ['mqtt'];
exports.html = `<div class="padding">
<div class="row"><div class="col-md-6">
<div data-jc="textbox" data-jc-path="host" data-jc-config="placeholder:test.mosquitto.org;required:false" class="m">Hostname or IP address (if not empty - setting will override db setting)</div>
</div>
<div class="col-md-6">
<div data-jc="textbox" data-jc-path="port" data-jc-config="placeholder:1883;required:true" class="m">Port</div>
</div>
</div>
<div class="row">
<div class="col-md-6">
<div data-jc="textbox" data-jc-path="tbname">@(SBS thingsboard name)</div>
</div>
<div class="col-md-6">
<div data-jc="textbox" data-jc-path="topic" class="m">@(topic)</div>		
</div>
</div>
</div>`;


exports.install = function(instance) {

	var mqtt = require('mqtt');
	var client;
	var opts;


	//set opts according to db settings
	instance.reconfigure = function() {

		if (instance.options.host !== "") {
			//override settings from database
			var o = instance.options;
			opts = {
				host: o.host,
				port: o.port,
				tbname: o.tbname,
				topic: o.topic,
				rejectUnauthorized: false,
				resubscribe: false
			};

			console.log("wsmqttpublich -> loadSettings from instance.options", instance.options);
		}

		connectToTbServer();
	}

	function connectToTbServer() {
		var url = "mqtt://" + opts.host + ":" + opts.port;
		console.log("MQTT URL: ", url);

		client = mqtt.connect(url, opts);

		client.on('connect', function() {
			client.subscribe(`${opts.topic}`, (err) => {
				if (!err) {
					console.log("MQTT subscribed");
				}
			});
			instance.status("Connected", "green");
		});

		client.on('reconnect', function() {
			instance.status("Reconnecting", "yellow");
		});

		client.on('message', function(topic, message) {
			// message is type of buffer
			message = message.toString();
			//console.log('messageeee', message, typeof message);
			if (message[0] === '{') {
				try {
					message = JSON.parse(message);
					instance.send(0, message);
					sendToTb({ temperature_out: message["temperature"] }, opts.tbname);
					//console.log("teplota sokolov z cloudu: ", message);
				} catch (error) {
					console.log("Mqtt_subscribe_temperature: unable to parse mqtt temperature message");
				}
			}

		});

		client.on('close', function(err) {
			if (err) console.log('client na mqtt teplotu sa odpojil')
			client.reconnect();
		});

		client.on('error', function(err) {
			instance.status("Err: " + err.code, "red");
		});

	}

	instance.close = function() {
		client.end();
	};

	instance.on('options', instance.reconfigure);
	instance.reconfigure();

	function sendToTb(values, tbName) {

		const dataToTb = {
			[tbName]: [

				{
					ts: Date.now(),
					values: values
				}
			]
		};

		instance.send(1, dataToTb);
	}
};