import os, random
from PIL import Image


light_directory = os.fsencode(str(os.getcwd() + "/planets/light"))
noise_directory = os.fsencode(str(os.getcwd() + "/planets/noise"))
sphere_directory = os.fsencode(str(os.getcwd() + "/planets/sphere"))

amount_lights = len(os.listdir(light_directory))
amount_noise = len(os.listdir(noise_directory))
amount_sphere = len(os.listdir(sphere_directory))

def changeImageColor(im, red, green, blue):
    # Split into 3 channels
    r, g, b, a = im.split()
    # Change channel by factor
    r = r.point(lambda i: i * red)
    g = g.point(lambda i: i * green)
    b = b.point(lambda i: i * blue)
    # Recombine back to RGB image
    result = Image.merge('RGBA', (r, g, b, a))
    return result

def changePlanetLayerColor(planetLayer):
    red = random.uniform(-0.5,1.5)
    green = random.uniform(-0.5,1.5)
    blue = random.uniform(-0.5,1.5)
    print(red,green,blue)
    changedColor = changeImageColor(planetLayer, red, green, blue)
    return changedColor

def blendPlanetParts(light, noise1, noise2, noise3, sphere, alpha):
    blended = Image.blend(sphere, light, alpha)
    blended = Image.blend(blended, noise1, alpha)
    blended = Image.blend(blended, noise2, alpha)
    blended = Image.blend(blended, noise3, alpha)
    return blended

def mergePlanetParts(light, noise1, noise2, noise3, sphere):
    planet = sphere
    planet.paste(light, (0, 0), light)
    planet.paste(noise1, (0, 0), noise1)
    planet = Image.blend(planet, noise2, 0.1)
    planet = Image.blend(planet, noise3, 0.1)
    #planet.paste(noise2, (0, 0), noise2)
    #planet.paste(noise3, (0, 0), noise3)
    return planet


def createRandomPlanet(seed):

    random.seed(seed)
    light = Image.open("planets/light/light" + str(random.randrange(0,amount_lights)) + ".png").convert('RGBA')
    noise1 = Image.open("planets/noise/noise" + str(random.randrange(0,amount_noise)) + ".png").convert('RGBA')
    noise2 = Image.open("planets/noise/noise" + str(random.randrange(0,amount_noise)) + ".png").convert('RGBA')
    noise3 = Image.open("planets/noise/noise" + str(random.randrange(0,amount_noise)) + ".png").convert('RGBA')
    sphere = Image.open("planets/sphere/sphere" + str(random.randrange(0,amount_sphere)) + ".png").convert('RGBA')

    light = changePlanetLayerColor(light)
    noise1 = changePlanetLayerColor(noise1)
    noise2 = changePlanetLayerColor(noise2)
    noise3 = changePlanetLayerColor(noise3)
    sphere = changePlanetLayerColor(sphere)

    planet = mergePlanetParts(light, noise1, noise2, noise3, sphere)

    return planet


planet = createRandomPlanet(random.randrange(0,10000))
planet.save("planet2.png")