text: var createError = require('http-errors');
  var express = require('express');
  var path = require('path');
  var cookieParser = require('cookie-parser');
  var logger = require('morgan');
  
  var WebSocket = require('ws');
  var midi = require('midi');
  
  var indexRouter = require('./routes/index');
  
  var app = express();
  
  // view engine setup
  app.set('views', path.join(__dirname, 'views'));
  app.set('view engine', 'pug');
  
  app.use(logger('dev'));
  app.use(express.json({ limit: '100mb' }));
  app.use(express.urlencoded({ extended: true }));
  app.use(cookieParser());
  app.use(express.static(path.join(__dirname, 'public')));
  
  app.use('/', indexRouter);
  
  // catch 404 and forward to error handler
  app.use(function(req, res, next) {
    next(createError(404));
  });
  
  // error handler
  app.use(function(err, req, res, next) {
    // set locals, only providing error in development
    res.locals.message = err.message;
    res.locals.error = req.app.get('env') === 'development' ? err : {};
  
    // render the error page
    res.status(err.status || 500);
    res.render('error');
  });
  
  
  var wsPort = 8888;
  var wss = new WebSocket.Server({ port: wsPort });
  
  let midiChannel = 0;
  
  var midiOutput = new midi.Output();
  midiOutput.openVirtualPort('Schisma Output');
  
  wss.on('connection', function connection(ws) {
    ws.on('message', function incoming(value) {
      const message = JSON.parse(value);
      console.log(message);
  
      switch (message.type) {
        case 'midi message':
          midiOutput.sendMessage(message.contents.data);
          break;
        case 'midi channel':
          midiChannel = message.contents.channel;
          break;
      }
    });
  });
  
  
  if (process.env.MIDI_INPUT_PORT) {
    const input = new midi.Input();
    const midiInputPort = parseInt(process.env.MIDI_INPUT_PORT, 10);
    const inputName = input.getPortName(midiInputPort);
  
    input.on('message', (deltaTime, message) => {
      const channel = message[0] + midiChannel - 1
      const midiMessage = [channel, message[1], message[2]];
      console.log(midiMessage);
      midiOutput.sendMessage(midiMessage);
    });
  
    input.openPort(midiInputPort);
    console.log(`Forwarding MIDI input from ${inputName} to Schisma...`)
  }
  
  
  module.exports = app;
  