import * as sort from './sort'

export {
  sort
}

export const is_iphone = !!((navigator.userAgent.match(/iPhone/i)) || (navigator.userAgent.match(/iPod/i)))
export const is_ipad = !!(navigator.userAgent.match(/iPad/i))
export const is_android = !!(navigator.userAgent.match(/Android/i))
export const is_mobile = is_iphone || is_ipad || is_android
export const is_desktop = ! is_mobile;

const htmlClassList = document.body.parentNode.classList
htmlClassList.add(is_desktop ? 'desktop' : 'mobile')
htmlClassList.remove('loading')

// window.debug = false

export function clamp(n,a,b) { return n<a?a:n<b?n:b }
export function norm(n,a,b) { return (n-a) / (b-a) }
export function lerp(n,a,b) { return (b-a)*n+a }
export function mix(n,a,b) { return a*(1-n)+b*n }
export function randint(n) { return Math.floor(Math.random()*n) }
export function randrange(a,b){ return Math.random() * (b-a) + a }

document.body.style.backgroundImage = 'linear-gradient(' + (randint(40)+40) + 'deg, #fde, #ffe)'

export function timeInSeconds(n){
  return (n / 10).toFixed(1) + ' s.'
}
export function gerund(s){
  return s.replace(/e?$/, 'ing')
}
export function commatize (n, radix) {
  radix = radix || 1024
  var nums = [], i, counter = 0, r = Math.floor
  if (n > radix) {
    n /= radix
    nums.unshift(r((n * 10) % 10))
    nums.unshift(".")
  }
  do {
    i = n % 10
    n = r(n / 10)
    if (n && ! (++counter % 3))
      { i = ' ' + r(i) }
    nums.unshift(r(i))
  }
  while (n)
  return nums.join("")
}
export function carbon_date (date, no_bold) {
  var span = (+new Date() - new Date(date)) / 1000, color
  if (! no_bold && span < 86400) // modified today
    { color = "new" }
  else if (span < 604800) // modifed this week
    { color = "recent" }
  else if (span < 1209600) // modifed 2 weeks ago
    { color = "med" }
  else if (span < 3024000) // modifed 5 weeks ago
    { color = "old" }
  else if (span < 12315200) // modifed 6 months ago
    { color = "older" }
  else
    { color = "quiet" }
  return color
}
export function hush_views (n, bias, no_bold) {
  var txt = commatize(n, 1000)
  bias = bias || 1
  n = n || 0
  if (n < 30) { return["quiet", n + " v."] }
  if (n < 200) { return ["quiet", txt + " v."] }
  else if (n < 500) { return ["quiet", txt + " v."] }
  else if (n < 1000) { return ["old", txt + " v."] }
  else if (n < 5000) { return ["med", txt + " kv."] }
  else if (no_bold || n < 10000) { return ["recent", txt + " kv."] }
  else { return ["new", txt + " kv."] }
}
export function hush_threads (n, bias, no_bold) {
  var txt = commatize(n, 1000)
  bias = bias || 1
  n = n || 0
  if (n < 10) { return["quiet", n + " t."] }
  else if (n < 25) { return ["old", txt + " t."] }
  else if (n < 50) { return ["med", txt + " t."] }
  else if (no_bold || n < 100) { return ["recent", txt + " t."] }
  else { return ["new", txt + " t."] }
}
export function hush_size (n, bias, no_bold) {
  var txt = commatize(Math.round(n / 1024))
  bias = 1 || bias
  n = n || 0
  if (! n) { return ['', ''] }
  if (n < 1000) {
    return ["quiet", n + " b."]
  }
  if (n < 1000000) {
    return ["quiet", txt + " kb."]
  }
  else if (n < (20000000/bias)) {
    return ["quiet", txt + " mb."]
  }
  else if (n < (50000000/bias)) {
    return ["old", txt + " mb."]
  }
  else if (n < (80000000/bias)) {
    return ["med", txt + " mb."]
  }
  else if (no_bold || n < (170000000/bias)) {
    return ["recent", txt + " mb."]
  }
  else {
    return ["new", txt + " mb."]
  }
}
export function hush_null (n, unit, no_bold) {
  var s = unit ? n + " " + unit + "." : n
  if (n < 3) {
    return ["quiet", s]
  }
  else if (n < 6) {
    return ["older", s]
  }
  else if (n < 10) {
    return ["old", s]
  }
  else if (n < 16) {
    return ["med", s]
  }
  else if (no_bold || n < 21) {
    return ["recent", s]
  }
  else {
    return ["new", s]
  }
}
export function get_age (t) {
  var age = Math.abs(+Date.now() - new Date(t))/1000
  var r = Math.floor
  var m
  if (age < 5) { return "now" }
  if (age < 60) { return r(age) + "s" }
  age /= 60
  if (age < 60) { return r(age) + "m" }
  m = r(age % 60)
  age /= 60
  if (m > 0 && age < 2) { return r(age) + "h" + m + "m" }
  if (age < 24) { return r(age) + "h" }
  age /= 24
  if (age < 7) { return r(age) + "d" }
  age /= 7
  if (age < 12) { return r(age) + "w" }
  age /= 4
  if (age < 12) { return r(age) + "m" }
  age /= 12
  return r(age) + "y"
}
export function courtesy_s (n, s) { return n == 1 ? "" : (s || "s") }