require('dotenv').config()

const io = require('socket.io-client')
const ss = require('socket.io-stream')
const zerorpc = require('zerorpc')
const Readable = require('stream').Readable;

let remote = io.connect(process.env.SOCKETIO_REMOTE);

remote.on('cmd', (data) => {
  if (! data.cmd || ! data.payload) {
    console.log('malformed param...?')
    return
  }
  console.log('got', data.cmd)
  switch (data.cmd) {
    case 'send_param':
      rpc.invoke(data.cmd, data.payload.key, data.payload.value, (err, res, more) => {
        console.log('sent param', res)
      })
      break
    case 'get_params':
      rpc.invoke(data.cmd, (err, res, more) => {
        console.log('got params', res)
        remote.emit('params', res)
      })
      break
  }
})

let rpc = new zerorpc.Client()
rpc.connect("tcp://127.0.0.1:" + process.env.RPC_PORT)
rpc.on("error", function(error) {
  console.error("RPC server error:", error)
})
console.log('RPC listening on port ' + process.env.RPC_PORT)

let relay = new zerorpc.Server({
  // Called when the worker starts up and is ready to receive params.
  connected: function (msg, reply) {
    reply()
    console.log("got connect from " + msg)
    return true
  },

  send_frame: function (fn, frame, reply) {
    reply()
    console.log('got frame, ' + frame.length + ' bytes')
    var stream = ss.createStream();
    ss(remote).emit('frame', stream, {name: fn})

    var s = new Readable();
    s._read = function noop() {}
    s.push(frame)
    s.push(null);
    s.pipe(stream)
  }
})
relay.on("error", function(error) {
  console.error("Relay server error:", error)
})
relay.bind("tcp://0.0.0.0:" + process.env.RELAY_PORT);
console.log('Relay listening on port ' + process.env.RELAY_PORT)