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import keys from './lib/keys'
import color from './lib/color'
import kalimba from './lib/kalimba'
import { browser, requestAudioContext } from './lib/util'
const root = 440
const s = 50
const w = window.innerWidth
const h = window.innerHeight
const ws = w/s, hs = h/s
const add_on = 0
const mul_on = 1.0
const add_off = 0.1
const mul_off = 0.9
let dragging = false
let lastFreq = 0
let notes = []
requestAudioContext( () => {
for (var i = 0; i < ws; i++) {
notes[i] = []
for (var j = 0; j < hs; j++) {
notes[i][j] = add(i, j)
}
}
})
function add (x, y) {
const i = x + 1
const j = y + 1
const div = document.createElement('div')
const freq = root * i/j
let add = 0
let frac = Math.log2(i/j) % 1
div.style.left = (x * s) + 'px'
div.style.top = (y * s) + 'px'
div.innerHTML = `<div>${i}<\/div><div>\/</div><div>${j}<\/div>`
if (frac < 0) {
frac += 1
}
if (i < j) {
add = -Math.log(j/i) / 3.5
}
else {
add = Math.log(i/j) / 6
}
if ( frac === 0) {
div.style.fontWeight = '900'
div.style.left = (x * s) + 'px'
div.style.top = (y * s) + 'px'
}
div.style.backgroundColor = color(frac, add_off + add, mul_off)
if (browser.isDesktop) {
div.addEventListener('mousedown', function(){
div.style.backgroundColor = color(frac, add + add_on, mul_on)
kalimba.play( freq )
})
div.addEventListener('mouseenter', function(){
div.style.backgroundColor = color(frac, add + add_on, mul_on)
if (dragging) {
kalimba.play( freq )
}
})
div.addEventListener('mouseleave', function(){
div.style.backgroundColor = color(frac, add + add_off, mul_off)
})
}
else {
div.addEventListener('touchstart', function(e){
e.preventDefault()
kalimba.play( freq )
lastFreq = freq
})
}
document.body.appendChild(div)
return freq
}
if (browser.isDesktop) {
document.addEventListener('mousedown', () => { dragging = true })
document.addEventListener('mouseup', () => { dragging = false })
}
else {
document.addEventListener('touchstart', (e) => { e.preventDefault(); dragging = true })
document.addEventListener('touchmove', (e) => {
e.preventDefault()
const x = Math.floor( e.touches[0].pageX / s )
const y = Math.floor( e.touches[0].pageY / s )
if (! (x in notes) || ! (y in notes[x])) return
const freq = notes[x][y]
if (freq !== lastFreq) {
kalimba.play( freq )
lastFreq = freq
}
})
document.addEventListener('touchend', () => { dragging = false })
}
keys.listen(function(index){
// const freq = scales.current().index(index)
// document.body.style.backgroundColor = color( index / scales.current().scale.length )
// kalimba.play(freq)
})
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