//built-in
const path = require("path");
// const fs = require('fs').promises;

//fastify
const fastify = require("fastify")({
  logger: false,
});
fastify.register(require("fastify-static"), {
  root: path.join(__dirname, "public"),
  prefix: "/"
});

//socket.io
var io = require("socket.io")(fastify.server, {
  pingInterval: 1000,
  pingTimeout: 3000
});

//socket.io events
io.on("connection", function(socket) {

  //connection notify
  console.log("someone connected.");
  socket.on("disconnect", function() { console.log("someone disconnected."); });

  //on 'rover'
  socket.on('rover', function(rover) {
    socket.broadcast.emit('rover', rover);
  })

});

//listen
var port = process.env.PORT || 8080;
fastify.listen(port, function (err, address) {
  if (err) {
    fastify.log.error(err)
    process.exit(1)
  }
  console.log(`Your app is listening on ${address}`)
  fastify.log.info(`server listening on ${address}`)
});