const FRAME_RATE = 25
export function frameTimestamp(n = 0) {
  n /= FRAME_RATE
  let s = pad((n % 60).toFixed(1))
  n = Math.floor(n / 60)
  if (n > 60) {
    return Math.floor(n / 60) + ':' + pad(n % 60) + ':' + s
  }
  return (n % 60) + ':' + s
}
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 carbon_time (date, no_bold) {
  var span = (+new Date() - new Date(date)) / 1000, color
  if (! no_bold && span < 3600) // modified this hour
    { color = "new" }
  else if (span < 3 * 3600) // modifed last 3 hours
    { color = "recent" }
  else if (span < 12 * 3600) // modifed last 12 hours
    { color = "med" }
  else if (span < 24 * 3600) // modifed last day
    { color = "old" }
  else if (span < 48 * 3600) // modifed last two days
    { 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."]
  }
  if (n < (20000000/bias)) {
    return ["quiet", txt + " mb."]
  }
  if (n < (50000000/bias)) {
    return ["old", txt + " mb."]
  }
  if (n < (80000000/bias)) {
    return ["med", txt + " mb."]
  }
  if (no_bold || n < (170000000/bias)) {
    return ["recent", txt + " mb."]
  }
  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") }
export function pad(n, r){ return n < 10 ? '0' + n : n }