var express = require('express');
let  router = express.Router();
let mqtt = require('mqtt');
let toSend = null;

const brenndauer = 20;                                      // 20sec Relais ON

// MQTT:
let connected = false;
let status = 'MIST';
let client = mqtt.connect('mqtt://play.rexfue.de');

client.on('connect', function() {
    connected = true;
    client.subscribe('stat/laufschrift/POWER');
})

client.on('message',function(topix,message) {
    let erg = message.toString();
    console.log("Status = ",erg);
    status = erg;
});

function doPublish(payload) {
    status = 'pending';
    client.publish('cmnd/laufschrift/Power',payload);
    if (payload == 'On') {
        setTimeout(doPublish,brenndauer*1000,"Off");
    }
}


/* GET switch data */
router.get('/:cmd', function(req, res, next) {
    let cmd = req.params.cmd;
    let wert = req.query.wert;

    if (cmd == 'get_status') {
        doPublish("");
    } else if (cmd == 'switch_on') {
        doPublish("On");
    } else if (cmd == 'switch_off') {
        doPublish("Off");
    } else if (cmd == 'check') {
    } else {
        erg = { error: "invalid command"};
        res.json(erg);
    }
    res.json({status:status});
});


module.exports = router;