# a3.py
# YOUR NAME(S) AND NETID(S) HERE
# DATE COMPLETED HERE
""" Functions for Assignment A3"""
import colormodel
import math

def complement_rgb(rgb):
   """Returns: the complement of color rgb.
   
   Precondition: rgb is an RGB object"""
   assert (type(rgb) == colormodel.RGB), 'Value '+ `rgb`+' is not a RGB object'
   # THIS IS WRONG.  FIX IT
   return colormodel.RGB(rgb.red, rgb.green, rgb.blue)


def truncate5(value):
   """Returns: value, as a string, using exactly 5 characters.

   The truncated value will have one of the forms:
      ddd.d      Example:  '360.1'
      dd.dd      Example:  '29.53'
      d.ddd      Examples: '4.003',  '0.001',  and '0.000'
   
   Precondition: value is a number (int or float), 0 <= value <= 999."""

   assert (type(value) == int or type(value) == float), 'Value '+ `value`+' is not a number'
   assert (0 <= value  and value <= 999), 'Value '+ `value`+' is outside of the range 0..999'
   
   # To get the desired output, do the following
   #   1. Make sure value is a float.  If it is not, convert it to one.
   #   1. If value < 0.001, set value to 0.
   #      This prevents value appearing in scientific notation, e.g. 1.5E-6.
   #   2. Convert value to a string s, in the usual way. Note that s is guaranteed to
   #      have at least three chars: a decimal point and a digit on either side of it.
   #      Therefore, the simplest thing to do as s is being constructed is to make
   #      sure s has at least 5 chars by appending "00" after the decimal point.
   #   3. Return the first five characters of s.
   return ''


def round5(value):
   """ Returns: value, as a string, but expanded or rounded to be (if necessary) exactly 5 characters.
   
   Examples:
      Round 1.3546  to  '1.355'.
      Round 1.3544  to  '1.354'.
      Round 21.9954 to  '22.00'.
      Round 21.994  to  '21.99'.
      Round 130.59  to  '130.6'.
      Round 130.54  to  '130.5'.
      Round 1       to  '1.000'.
   
   Precondition: value is a number (int or float), 0 <= value <= 360."""
   assert (type(value) == int or type(value) == float), 'Value '+ `value`+' is not a number'
   assert (0 <= value  and value <= 360), 'Value '+ `value`+' is outside of the range 0..360.'

   # Note. You want to round and then call truncate5. DO NOT convert value
   # to a string and then back to a float in order to call truncate5.
   # Points will be deducted for this.
   #
   # MAKE SURE THAT VALUE IS A FLOAT BEFORE USING THE BUILT-IN round() FUNCTION
   # If it is not a float convert it to one with the float() function.
   #
   # Obviously, you want to use the built-in function round().  However, 
   # remember that the rounding takes place at a different place depending on
   # how big value is. Look at the examples in the specification.
   
   # ASSERT PRECONDITIONS
   return ''



def rgb_to_string(rgb):
   """Returns: String representation of rgb in the form "(R, G, B)".
   
   Precondition: rgb is an RGB object"""
   # ASSERT PRECONDITIONS
   return ''


def cmyk_to_string(cmyk):
   """Returns: String representation of cmyk in the form "(C, M, Y, K)".
   
   In the output, each of C, M, Y, and K should be exactly 5 characters long.
   
   Precondition: cmyk is an CMYK object."""
   # ASSERT PRECONDITIONS
   return ''


def hsv_to_string(hsv):
   """Returns: String representation of hsv in the form "(H, S, V)".
   
   In the output, each of H, S, and V should be exactly 5 characters long.

   Precondition: hsv is an HSV object."""
   # ASSERT PRECONDITIONS
   return ''


def rgb_to_cmyk(rgb):
   """Returns: color rgb as a CMYK object, with the most black possible.

   Formulae from en.wikipedia.org/wiki/CMYK_color_model.

   Precondition: rgb is an RGB object"""
   # ASSERT PRECONDITIONS
   return None



def cmyk_to_rgb(cmyk):
   """Returns : color CMYK in as an RGB object.

   Formulae from en.wikipedia.org/wiki/CMYK_color_model.
   
   Precondition: cmyk is an CMYK object."""
   # ASSERT PRECONDITIONS
   return None


def rgb_to_hsv(rgb):
   """Return: color rgb as a HSV object.

   Formulae from wikipedia.org/wiki/HSV_color_space.
   
   Precondition: rgb is an RGB object"""
   # ASSERT PRECONDITIONS
   return None


def hsv_to_rgb(hsv):
   """Returns: color hsv as an RGB object.
   
   Formulae from http://en.wikipedia.org/wiki/HSV_color_space.
   
   Precondition: hsv is an HSV object."""
   # ASSERT PRECONDITIONS
   return None