# Pastebin cT3iIhCV
var connect = require('./ftdi')
var ndarray = require('ndarray')
var getFrame = require('pixels-apa102')
var hsl = require('./hsl.js')
var net = require('net')
var split = require('split')
process.stdin.pipe(split()).on('data', function (c) {
  var num = parseFloat(c)
  queue.push(num)
})


var queue = []

connect(0, function (err, send) {
  if (err) throw err
  var lastStrand = null
  var frame = 0
    
  var h = 0
  var s = 1.0
  var l = 0.5
  var FPS = 60
  var dir = 1
  function march () {
    frame += dir
  }
  
  setInterval(function () {
    march(frame)
    
    var strand = Strand(118)
    var next = queue.shift()
    console.log('next', [next])
    if (next) h = parseFloat(next)
    set(strand, 0, hsl(h, s, l))

    if (lastStrand) {
      for (var i = 1; i < strand.shape[0]; i++) {
        strand.set(i, 0, lastStrand.get(i - dir, 0))
        strand.set(i, 1, lastStrand.get(i - dir, 1))
        strand.set(i, 2, lastStrand.get(i - dir, 2))
      }
    }
    lastStrand = strand
    send(getFrame(strand))
  }, 1000 / FPS)
})

function Strand (length) {
  return ndarray(new Uint8Array(length * 3), [length, 3])
}

function set (target, x, rgb) {
  target.set(x, 0, rgb[0])
  target.set(x, 1, rgb[1])
  target.set(x, 2, rgb[2])
}