from random import random, choice
from PIL import Image, ImageFilter, ImageEnhance
from functools import reduce

import argparse
import os
import builtins


def color_ramp(white=(255, 255, 255), black=(0, 0, 0)):
    wr, wg, wb = white
    br, bg, bb = black

    colors = [[br + (wr - br) * i / 255, bg + (wg - bg) * i / 255, bb + (wb - bb) * i / 255] for i in range(255)]

    return list(map(int, reduce(list.__add__, colors)))


def clamp(min, value, max):
    return builtins.max(min, builtins.min(value, max))


sepia = color_ramp((255 - int(random()*25), 230 + int(random()*25), 179+int(random()*25)))


class Mariusz:
    def __init__(self, colors=sepia, decals=5, noise=.4, brightness=.9, blur=1.3):
        self.colors = colors
        self.decal_count = decals
        self.noise = noise
        self.brightness = brightness
        self.blur = blur

        self.decals = [os.path.join("decals", f) for f in os.listdir("decals") if os.path.isfile(os.path.join("decals", f))]

    def fuck(self, image):
        print("Fucking {}...".format(image))
        im = Image.open(image)
        im = im.convert("L")
        im.putpalette(self.colors)
        im = im.convert("RGBA")
        im = ImageEnhance.Brightness(im).enhance(self.brightness)

        ok = im.copy()

        Mariusz.add_noise(im, self.noise)
        for _ in range(self.decal_count):
            Mariusz.add_decal(im, choice(self.decals))

        im = im.filter(ImageFilter.GaussianBlur(self.blur))
        damaged = im.convert("RGB")

        return ok, damaged

    @staticmethod
    def add_decal(image, decal):
        decal = Image.open(decal)
        w, h = image.size

        scale = .5 + random()
        scale = scale * min(w/decal.size[0], 1)

        decal = decal.rotate(random() * 360, expand=True)
        decal = decal.resize(map(int, (scale * decal.size[0], scale * decal.size[1])), Image.ANTIALIAS)

        dw, dh = decal.size
        pos = tuple(map(int, (random() * w - .5 * dw, random() * h - .5 * dh)))

        image.paste(decal, pos, decal)

    @staticmethod
    def add_noise(image, level):
        data = image.getdata()

        def noise(t):
            w = int(random() * 255 * level)
            r, g, b, a = t

            return clamp(0, r - w, 255), clamp(0, g - w, 255), clamp(0, b - w, 255), a

        data = list(map(noise, data))
        image.putdata(data)


if __name__ == '__main__':
    parser = argparse.ArgumentParser(description="Damages image")
    parser.add_argument('input', help='Image to damage', type=str)
    parser.add_argument('output', help='Output image name', type=str, nargs='?')
    parser.add_argument('damaged', help='Output damaged image name', type=str, nargs='?')

    parser.add_argument('-d', help='Decals count', type=int, default=8, dest="decals")
    parser.add_argument('-n', help='Noise level', type=float, default=.4, dest="noise")
    parser.add_argument('-g', help='Blur level', type=float, default=1.5, dest="blur")
    parser.add_argument('-b', help='Noise level', type=float, default=.9, dest="brightness")

    args = parser.parse_args()

    if args.output is None:
        dir, name = os.path.split(args.input)
        args.output = os.path.join(dir, "ok_" + name)

    if args.damaged is None:
        dir, name = os.path.split(args.input)
        args.damaged = os.path.join(dir, "damaged_" + name)

    mariusz = Mariusz(sepia, args.decals, args.noise, args.brightness, args.blur)
    if os.path.isfile(args.input):
        ok, damaged = mariusz.fuck(args.input)
        ok.convert('RGB').save(args.output)
        damaged.convert('RGB').save(args.damaged)
    else:
        for f in os.listdir(args.input):
            path = os.path.join(args.input, f)

            ok, damaged = mariusz.fuck(os.path.join(args.input, f))
            ok.convert('RGB').save(os.path.join(args.output, f))
            damaged.convert('RGB').save(os.path.join(args.damaged, f))