local function getDiff(t)
  return t - os.epoch("utc") / 1000
end

local function dispTime(t)
  t = math.abs(t)
  local y = math.floor(t / 31536000)
  local mo = math.floor((t % 946080000) / 31536000)
  local d = math.floor((t % 31536000) / 86400)
  local h = math.floor((t % 86400) / 3600)
  local m = math.floor((t % 3600) / 60)
  local s = math.floor((t % 60))
  return y, mo, d, h, m, s
end

local function getDistanceFrom(nTime)
  local diff = getDiff(nTime)
  local y, mo, d, h, m, s = dispTime(diff)

  if diff > 0 then
    if y > 1 then
      return ("in %d years"):format(y), 0
    elseif y == 1 then
      return ("in 1 year"), 0
    elseif d > 1 then
      return ("in %d days"):format(d), 0
    elseif d == 1 then
      return "tommorow", 0
    elseif h == 1 then
      return "in 1 hour", 0
    elseif h > 0 then
      return ("in %d hours"):format(h), 0
    elseif m == 1 then
      return "in 1 minute", 0
    elseif m > 0 then
      return ("in %d minutes"):format(m), 0
    elseif s == 1 then
      return "in 1 second", 0
    elseif s > 0 then
      return ("in %d seconds"):format(s), 0
    else
      return "in 0 seconds", 0
    end
  elseif diff < 0 then
    if y > 1 then
      return ("%d years ago"):format(y), 1
    elseif y == 1 then
      return ("1 year ago"), 1
    elseif d > 1 then
      return ("%d days ago"):format(d), 1
    elseif d == 1 then
      return "yesterday", 1
    elseif h == 1 then
      return ("1 hour ago"), 1
    elseif h > 0 then
      return ("%d hours ago"):format(h), 1
    elseif m == 1 then
      return ("1 minute ago"), 1
    elseif m > 0 then
      return ("%d minutes ago"):format(m), 1
    elseif s >= 30 then
      return ("%d seconds ago"):format(s), 1
    else
      return "just now", 1
    end
  else
    return "just now"
  end
end

return getDistanceFrom