''' Purpose: provide simple testing of sepia reduction
'''

import url

from PIL import Image

def manip( original, d, c, l ) :
    ''' Provide a pattern for image manipulation
    '''

    # get dimensions of the original
    ow, oh = original.size

    # set dimensions of the new image
    nw, nh = d( original )

    # get a new appropriately sized image
    new_image = Image.new( 'RGB', ( nw, nh ) )

    # fill in every pixel of the new image
    for nx in range( 0, nw ) :      # consider every x value for the new image
        for ny in range( 0, nh ) :  # in tandem with every y value for the image
            # set the spot to be filled in the new image
            nspot = ( nx, ny )

            # determine the corresponding spot of interest in the original
            ospot = l( nspot, nw, nh )

            # get the pixel at the ospot
            opixel = original.getpixel( ospot )

            # determine the pixel for the new image
            npixel = c( opixel )

            # set the nspot in the new image
            new_image.putpixel( nspot, npixel )

    # return the filled in new image
    return new_image

def sepia_tone( original ) :
    ''' Return a new sepia-colored version of original
    '''
    import locate, mutate, dimensions

    new_image = manip( original, dimensions.same, mutate.sepia, locate.same )

    return new_image

if ( __name__ == '__main__' ) :

    import url

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

    original = url.get_image( link )

    new_image = sepia_tone( original )

    new_image.show()