require 'compass'
Compass::Frameworks.register("sassy-math", :path => "#{File.dirname(__FILE__)}/..")

# Sassy math Functions
module Sass::Script::Functions
  # Exponents
  def exponent(base, powerNum, powerDen)
    base = base.value.to_f
    powerNum = powerNum.value.to_f
    powerDen = powerDen.value.to_f
    result = base ** (powerNum / powerDen)
    Sass::Script::Number.new(result)
  end
  def power(base, exponent)
    base = base.value.to_f
    exponent = exponent.value.to_f
    result = base ** exponent
    Sass::Script::Number.new(result)
  end
  def sqrt(number)
    number = number.value.to_f
    result = Math.sqrt(number)
    Sass::Script::Number.new(result)
  end
  def nth_root(number, root)
    number = number.value.to_f
    root = root.value.to_f
    result = number ** (1.0 / root)
    Sass::Script::Number.new(result)
  end
  # Logarithms
  def ln(num)
    result = Math.log(num.value)
    Sass::Script::Number.new(result)
  end
  def log10(num)
    result = Math.log10(num.value)
    Sass::Script::Number.new(result)
  end
  # Miscellaneous
  def factorial(number)
    result = 1
    number = number.value
    if number > 0
      (1..number).each do |i|
        result = result * i
      end 
    end 
    Sass::Script::Number.new(result)
  end
  def random(max = Sass::Script::Number.new(100)) ## shamelessly taken from here: https://gist.github.com/1561650
    Sass::Script::Number.new(rand(max.value), max.numerator_units, max.denominator_units)
  end
  def hypot(a, b)
    a = a.value.to_f
    b = b.value.to_f
    result = Math.hypot(a, b)
    Sass::Script::Number.new(result)
  end
  # Constants
  def pi
    pi = Math::PI
    Sass::Script::Number.new(pi)
  end
  def e
    e = Math::E
    Sass::Script::Number.new(e)
  end
  def golden_ratio()
    result = (1.0 / 2.0) + (Math.sqrt(5) / 2.0)
    Sass::Script::Number.new(result)
  end
  # Comparative Functions
  def is_int(number)
    number = number.value.to_f
    if number - number.floor != 0
      result = false
    else
      result = true
    end
    Sass::Script::Bool.new(result)
  end
  def is_float(number)
    number = number.value
    if number - number.floor != 0
      result = true
    else
      result = false
    end
    Sass::Script::Bool.new(result)
  end
  # Trigonometric Functions
  def deg_to_rad(degree)
    result = degree.value.to_f * Math::PI / 180
    Sass::Script::Number.new(result)
  end
  def rad_to_deg(rad)
    result = rad.value.to_f * 180 / Math::PI
    Sass::Script::Number.new(result)
  end
  def cosh(rad)
    rad = rad.value.to_f
    result = Math.cosh(rad)
    Sass::Script::Number.new(result)
  end
  def acos(rad)
    rad = rad.value.to_f
    result = Math.acos(rad)
    Sass::Script::Number.new(result)
  end
  def acosh(rad)
    rad = rad.value.to_f
    result = Math.acosh(rad)
    Sass::Script::Number.new(result)
  end
  def sinh(rad)
    rad = rad.value.to_f
    result = Math.sinh(rad)
    Sass::Script::Number.new(result)
  end
  def asin(rad)
    rad = rad.value.to_f
    result = Math.asin(rad)
    Sass::Script::Number.new(result)
  end
  def asinh(rad)
    rad = rad.value.to_f
    result = Math.asinh(rad)
    Sass::Script::Number.new(result)
  end
  def tanh(rad)
    rad = rad.value.to_f
    result = Math.tanh(rad)
    Sass::Script::Number.new(result)
  end
  def atan(rad)
    rad = rad.value.to_f
    result = Math.atan(rad)
    Sass::Script::Number.new(result)
  end
  def atan2(y, x)
    y = y.value.to_f
    x = x.value.to_f
    result = Math.atan2(y, x)
    Sass::Script::Number.new(result)
  end
  def atanh(rad)
    rad = rad.value.to_f
    result = Math.atanh(rad)
    Sass::Script::Number.new(result)
  end
end

module SassyMath
  
  VERSION = "1.3"
  DATE = "2012-07-29"

end