''' Purpose: support image bluing transformation
'''

def weird( opixel ) :
    ''' Returns the new pixel when performing a bluing of opixel
        get the color (pixel) of the original picture --> convert it to some blue for the new image
    '''
    # all pixels have some amount of red, green, blue --> denoted by (red, green, blue)
    # to blue a pixel, ignore the red and green color components
    red, green, blue = opixel
    npixel = (blue, blue, blue)   # if there are equal amounts of red, green, and blue --> that is a shade of black --> we see some sort of graying# we don't want any red from the opixel, no green from the opixel, and
    # include the blue component from the opixel to the npixel

    # we can manipulate the values of each color component of npixel

    red, green, blue = opixel
    npixel = (0, 0, blue)  # we don't want any red from the opixel, no green from the opixel, and
    # include the blue component from the opixel to the npixel
    # each pixel has a unique blue value, it's not a single value blue so that's why we can still discern each pixel
    # in the image

    return npixel

if ( __name__ == '__main__' ) :

    import url
    from manip import manip
    
    # get web image of interest
    link = "http://www.cs.virginia.edu/~cs1112/images/mandrill/full.png"

    original = url.get_image( link )

    # here, we pass the function blue into the manip function as the color function
    # this will produce a new image that's the blue'd version of the original image
    # if not given color=color_function, it will use the same color as the original image as default
    new_image = manip( original, color=weird )

    # blue/weird here is not a color, it is the name of a function that we made to make the image blue
    # color is the name we give the parameter that takes in the name of the function that manipulates
    # the color of the image

    new_image.show()