var is_iphone = (navigator.userAgent.match(/iPhone/i)) || (navigator.userAgent.match(/iPod/i))
var is_ipad = (navigator.userAgent.match(/iPad/i))
var is_android = (navigator.userAgent.match(/Android/i))
var is_mobile = is_iphone || is_ipad || is_android
var is_desktop = ! is_mobile;
document.body.classList.add(is_desktop ? 'desktop' : 'mobile');

function choice(a){ return a[randint(a.length)] }

function csrf() {
  return $("[name=_csrf]").attr("value")
}
function bold_terms (s, terms) {
  s = sanitizeHTML(s)
  terms.forEach( (term) => {
    s = s.replace(new RegExp(term, "ig"), "<b>" + term + "</b>")
  })
  return s
}
function querystring(opt){
  return '?' + Object.keys(opt).map((key) => {
    return encodeURIComponent(key) + "=" + encodeURIComponent(opt[key])
  }).join("&")
}
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("")
}

function privacy_dot (p) {
  if (! p) return "&middot;"
  else return ".:"
}

var short_months = "Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec".split(" ")
function verbose_date (date, no_pad_hours) {
  var date = new Date(date * 1000)
	var d = date.getDate()
	var m = date.getMinutes()
  var h = date.getHours()
  var meridian

	if (h == 0) {
	  h = 12
		meridian = "&nbsp;am"
  }
	else if (h == 12) {
	  meridian = "&nbsp;pm"
	}
	else if (h > 12) {
	  h -= 12
	  meridian = "&nbsp;pm"
	}
	else {
	  meridian = "&nbsp;am"
	}

	if (d < 10) d = "0" + d
	if (m < 10) m = "0" + m
	if (! no_pad_hours && h < 10) h = "0" + h

  // non-breaking hyphen: &#8209;
  var date = d + '&nbsp;' + short_months[date.getMonth()] + '&nbsp;' + date.getFullYear()
  var time = h + ':' + m + meridian

  return [date, time]
}
function carbon_date (date, no_bold) {
  var span = (+new Date() / 1000 - date)
  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
}

function hush_views (n, bias, no_bold) {
  var txt = commatize(n, 1000)
  bias = bias || 1
  n = n || 0
  if (n < 30) { return["quiet", n + "&nbsp;v."] }
  if (n < 200) { return ["quiet", txt + "&nbsp;v."] }
  else if (n < 500) { return ["quiet", txt + "&nbsp;v."] }
  else if (n < 1000) { return ["old", txt + "&nbsp;v."] }
  else if (n < 5000) { return ["med", txt + "&nbsp;kv."] }
  else if (no_bold || n < 10000) { return ["recent", txt + "&nbsp;kv."] }
  else { return ["new", txt + "&nbsp;kv."] }
}
function hush_threads (n, bias, no_bold) {
  var txt = commatize(n, 1000)
  bias = bias || 1
  n = n || 0
  if (n < 10) { return["quiet", n + "&nbsp;t."] }
  else if (n < 25) { return ["old", txt + "&nbsp;t."] }
  else if (n < 50) { return ["med", txt + "&nbsp;t."] }
  else if (no_bold || n < 100) { return ["recent", txt + "&nbsp;t."] }
  else { return ["new", txt + "&nbsp;t."] }
}

function hush_size (n, bias, no_bold) {
  var txt = commatize(Math.floor(n / 1024))
  bias = 1 || bias
  n = n || 0
  if (n < 1024) {
    return ["quiet", n + "&nbsp;b."]
  }
  if (n < 1024*1024) {
    return ["quiet", txt + "&nbsp;kb."]
  }
  else if (n < (20000000/bias)) {
    return ["quiet", txt + "&nbsp;mb."]
  }
  else if (n < (50000000/bias)) {
    return ["old", txt + "&nbsp;mb."]
  }
  else if (n < (80000000/bias)) {
    return ["med", txt + "&nbsp;mb."]
  }
  else if (no_bold || n < (170000000/bias)) {
    return ["recent", txt + "&nbsp;mb."]
  }
  else {
    return ["new", txt + "&nbsp;mb."]
  }
}

function hush_null (n, unit, no_bold) {
  var s = unit ? n + "&nbsp;" + 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]
  }
}

function courtesy_s (n, s) { return n == 1 ? "" : (s || "s") }

var revision_letters = "z a b c d f g h j k l m n p q r s t v w x y".split(" ")
function get_revision (thread) {
  if (! thread.revision) return ""
  var rev = thread.revision
  var n = 0
  var digits = ""
  do {
    n = rev % 21
    rev = Math.floor(rev / 21)
    digits = revision_letters[n] + digits
  }
  while (rev !== 0)
  return digits
}

function get_age (t) {
  var age = Math.abs( Date.now()/1000 - t)
  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"
}

function tidy_urls (s, short_urls) {
  var ret = s.split("\n").map(function(line){
    if (line.indexOf("<") !== -1) {
      return line
    }
    return line.replace(/https?:\/\/[^ ]+/g, function(url){
      if (is_image(url)) {
        return '<a href="' + url + '" target="_blank"><img src="' + url + '"></a>'
      }
      else if (short_urls) {
        return '<a href="' + url + '" target="_blank">[' + get_domain(url) + ']</a>'
      }
      else {
        return '<a href="' + url + '" target="_blank">' + url + '</a>'
      }
    });
  })
  .join("\n")
  .replace(/\r/g, "")
  .replace(/<code>\n/g, "<code>")
  .replace(/<\/code>\n/g, "</code>")
  return ret
}
function get_domain(url){
  return url.replace(/https?:\/\//,"").replace(/\/.*/,"").replace(/www\./, "")
}
function is_image(url){
  return !! url.match(/\.(gif|jpe?g|png)\??.*$/i)
}
function make_link(file){
  if (file.storage) {
    return "//s3.amazonaws.com/" + file.storage + sdk.opt.s3.path + "/data/" + file.thread + "/" + encodeURIComponent(file.filename)
  }
  if (file.filename.indexOf("http") !== 0) {
    return "/data/" + file.thread + "/" + encodeURIComponent(file.filename)
  }
  return file.filename
}
function profile_image(username){
  return "//s3.amazonaws.com/i.asdf.us/bucky/profile/" + username + ".jpg"
}
function make_thumb(file){
  if (file.storage) {
    return "//s3.amazonaws.com/" + file.storage + sdk.opt.s3.path + "/data/" + file.thread + "/" + encodeURIComponent(file.filename)
  }
  if (file.filename.indexOf("http") !== 0) {
    return "/data/" + file.thread + "/" + file.filename
  }
  return "/data/" + file.thread + "/" + file.filename
  // var partz = file.filename.toLowerCase().split("/")
  // return partz.splice(partz.length-2, 0, ".thumb").join("/")
}

var metadataTemplate = $(".metadata_template").html()
function metadata(thread){
  var datetime = verbose_date(thread.createdate, true)
  var age = get_age(thread.lastmodified, true)
  var t = metadataTemplate
              .replace(/{{username}}/g, thread.username)
              .replace(/{{date}}/g, datetime[0])
              .replace(/{{time}}/g, datetime[1])
              .replace(/{{active}}/g, age + " ago")
              .replace(/{{views}}/g, thread.viewed + " view" + courtesy_s(thread.viewed))
  return t
}