local MAX_SECONDS = 60 * 60 * 12

local Hand = {}
Hand.__index = Hand

function Hand:new(length, color, sec_per_turn, ticks_per_turn)
  local h = {
    length = (length or 10),
    color = (color or {1,1,1}),
    sec_per_turn = (sec_per_turn or 1),
    ticks_per_turn = ticks_per_turn
  }
  return setmetatable(h, self)
end

local function handTransform(sec_elapsed)
  local turns = sec_elapsed / self.sec_per_turn
  if self.ticks_per_turn then
    turns = math.floor(turns * self.ticks_per_turn) / self.ticks_per_turn
  end
  return love.math.newTransform(0, 0, 2 * math.pi * turns)
end

function Hand:draw(sec_elapsed)
  local turns = sec_elapsed / self.sec_per_turn
  if self.ticks_per_turn then
    turns = math.floor(turns * self.ticks_per_turn) / self.ticks_per_turn
  end
  love.graphics.push("all")
  love.graphics.applyTransform(handTransform(sec_elapsed))
  love.graphics.setColor(unpack(self.color))
  love.graphics.rectangle("fill", -10, 10, 20, -self.length)
  love.graphics.pop()
end