import Tone from 'tone'
import scales from './lib/scales'
import keys from './lib/keys'
import { choice } from './lib/util'
import color from './lib/color'

const player_count = 4

const compressor = new Tone.Compressor(-30, 3).toMaster()

const samples = [
  { root: 226, fn: 'samples/380737__cabled-mess__sansula-01-a-raw.wav', },
  { root: 267, fn: 'samples/380736__cabled-mess__sansula-02-c-raw.wav', },
  { root: 340, fn: 'samples/380735__cabled-mess__sansula-03-e-raw.wav', },
  { root: 452, fn: 'samples/380733__cabled-mess__sansula-06-a-02-raw.wav', },
  { root: 507, fn: 'samples/380734__cabled-mess__sansula-07-b-h-raw.wav', },
  { root: 535, fn: 'samples/380731__cabled-mess__sansula-08-c-raw.wav', },
  { root: 671, fn: 'samples/380732__cabled-mess__sansula-09-e-raw.wav', },
]

samples.forEach((sample) => {
  sample.players = []
  sample.index = -1
  for (let i = 0; i < player_count; i++) {
    let player = new Tone.Player({
      url: sample.fn,
      retrigger: true,
      playbackRate: 1,
    })
    player.connect(compressor)
    sample.players.push(player)
  }
})

scales.build()

keys.listen(function(index){
  const freq = scales.current().index(index)
  document.body.style.backgroundColor = color( index / scales.current().scale.length )
  play(freq)
})

function play (freq) {
  const best = { sample: choice(samples) }
  best.sample.index = (best.sample.index + 1) % player_count

  const player = best.sample.players[ best.sample.index ]
  player.playbackRate = freq / best.sample.root
  player.start()
}