const express = require('express')
const http = require('http')
const WebSocket = require('ws')
const osc = require('osc')
const readline = require('readline')
const fs = require('fs')

const port = 6676
// Vzemi iz argumenta
const tty = process.argv[2]
const baudrate = parseInt(process.argv[3]) || 115200

const include_files = [
  '/anim.js',
  '/control.js',
  '/osctl.js',
  '/test.js',
  '/node_modules/three/build/three.min.js',
  '/node_modules/nouislider/distribute/nouislider.min.js',
  '/node_modules/nouislider/distribute/nouislider.min.css',
  '/node_modules/osc/dist/osc-browser.js'
];

const app = express();
const server = http.Server(app);

// Odprti serijski OSC link
let scon = null

function getArgs(parts) {
  console.log('split to parts', parts)
  switch (parts[1]) {
  case 'quaternion':
    return parts.splice(2).map((num) => ({
      type: 'f',
      value: parseFloat(num)
    }))
  }

  // Default
  return []
}

function getMsg(line) {
  return null
}

function openSerial() {
  console.log('opening ', tty)

  scon = new osc.SerialPort({
    devicePath: tty,
    bitrate: baudrate,
    autoOpen: true,
    useSLIP: true
  })
  scon.open()
  scon.on('open', e => {
    console.log('serial connection opened')
    //console.log(scon)
  })
  scon.on('error', e => {
    console.error('tty error', e)
    if (e.match(/cannot open/)) {
      scon.close()
    }
  })
  scon.on('close', e => {
    console.warn('serial connection closed, restarting in 1 second')
  })
  
  // Arduino OSC gre v web
  scon.on('message', msg => {
    // Debug incoming osc
    if (DEBUG) {
      console.log('osc msg', msg)
    }

    sendAll(msg, null, null, osclients)
  })

  if (scon._closeCode) {
    scon = null
    setTimeout(openSerial, 1000)
  }
}

if (tty) {
  openSerial(baudrate)
}

app.get('/', (req, res) => {
    res.sendFile(__dirname + '/index.html');
});

app.get('/ctl', (req, res) => {
    res.sendFile(__dirname + '/control.html');
});

app.get('/test', (req, res) => {
    res.sendFile(__dirname + '/test.html');
});

let settings = {};
app.get('/settings', function(req, res) {
    res.send(settings);
});

include_files.map(function(file) {
    app.get(file, function(req, res){
        res.sendFile(__dirname + file);
    });
});

server.listen(port, () => console.log('listening on *:' + port))

// Websocket init
const wss = new WebSocket.Server({ server })


// Relay multicast to websockets
// @TODO still sends to supercollider? Do we need two sockets?
var dgram = require('dgram');
var sss = dgram.createSocket('udp4');
sss.on('listening', () => {
  sss.addMembership('224.0.1.9');
})
sss.bind(6696, '224.0.1.9');

const scudp = new osc.UDPPort({
  remotePort: 6698,
  metadata: true,
  socket: sss
})

scudp.on('open', () => {
  console.log("UDP to OSC open")
})

scudp.on('message', (msg) => {
  console.log('got UDP msg', msg);
  osclients.forEach( client => {
    if (client) {
      //console.log("sending", msg, info)
      client.send(msg)
    }
  })
})
scudp.open()

const sendAll = (msg, info, oscWS, osclients) => {
  osclients.forEach( client => {
    if (client && oscWS != client) {
      //console.log("sending", msg, info)
      client.send(msg)
    }
  })

  if (scudp) {
    scudp.send(msg)
  }
}

const osclients = []

wss.on('connection', function (ws) {
  console.log('client connection', ws)
  const oscWS = new osc.WebSocketPort({
    socket: ws,
    metadata: false
  });

  // Vsi OSC sem grejo naprej na kliente OSC
  oscWS.on('packet', (packet, info) => {
    // Broadcast adjust msg
    const [address, args] = packet
    sendAll({ address, args}, info, oscWS, osclients)
  })

  oscWS.on('error', error => {
    console.warn('Ignoring invalid OSC')
    console.warn(error)
  })
  osclients.push(oscWS)
})