#!/usr/bin/python3

import getopt
import sys
import io
import json
import colorsys
from urllib.request import urlopen
from colorthief import ColorThief

ImageWebAddress = ''

try:
    Options, args = getopt.getopt(sys.argv[1:], 'i:', ['image='])
except getopt.GetoptError:
    print('DominantImageColor.py -i <Image web address>')
    sys.exit(2)

for Option, Argument in Options:
    if Option in ('-i', '--image'):
        ImageWebAddress = Argument

if ImageWebAddress.strip() == '':
    print('Image web address parameter is mandatory')
    sys.exit(2)

OriginalImage = urlopen(ImageWebAddress)
ImageBinary = io.BytesIO(OriginalImage.read())

ImageColorThief = ColorThief(ImageBinary)
DominantColor = ImageColorThief.get_color(quality=5)

DominantColorHSV = colorsys.rgb_to_hsv(int(DominantColor[0]) / 255, int(DominantColor[1]) / 255, int(DominantColor[2]) / 255)

JSONDominantColor =  {
    'hue' : int(DominantColorHSV[0] * 360),
    'saturation' : int(DominantColorHSV[1] * 100),
    'brightness' : int(DominantColorHSV[2] * 100)
}

FormatedJSONDominantColor = json.dumps(JSONDominantColor)

sys.stdout.write(FormatedJSONDominantColor)