# -*- coding: utf-8 -*-
import argparse
import glob
import os
import random

import numpy as np
import torch
from image_utils import (
    block_wise,
    color_contrast,
    color_saturation,
    gaussian_blur,
    gaussian_noise_color,
    jpeg_compression,
    load_image,
    video_compression,
)
from PIL import Image

# DIST_LEVEL = 3


def get_distortion_parameter(type, level):
    param_dict = dict()  # a dict of list
    param_dict["CS"] = [0.4, 0.3, 0.2, 0.1, 0.0]  # smaller, worse
    param_dict["CC"] = [0.85, 0.725, 0.6, 0.475, 0.35]  # smaller, worse
    param_dict["BW"] = [16, 32, 48, 64, 80]  # larger, worse
    param_dict["GNC"] = [0.001, 0.002, 0.005, 0.01, 0.05]  # larger, worse
    param_dict["GB"] = [7, 9, 13, 17, 21]  # larger, worse
    param_dict["JPEG"] = [2, 3, 4, 5, 6]  # larger, worse
    param_dict["VC"] = [30, 32, 35, 38, 40]  # larger, worse

    # level starts from 1, list starts from 0
    return param_dict[type][level - 1]


if __name__ == "__main__":
    parser = argparse.ArgumentParser()
    parser.add_argument("-i", dest="path", type=str, default="")
    parser.add_argument(
        "-t",
        dest="task",
        choices=[
            "noise",
            "block",
            "saturation",
            "contrast",
            "blur",
            "pixel",
            "compression",
        ],
        default="noise",
    )
    args = parser.parse_args()
    # Setting device
    device = torch.device("cuda")
    dest = args.path + "_" + args.task + "_" + "random" + "/"

    if not os.path.exists(dest):
        os.makedirs(dest)

    for dirpath, dirnames, filenames in os.walk(args.path):
        possible_files = os.path.join(dirpath, "*.png")

        for file in glob.glob(possible_files):
            img = load_image(file)
            dist_level = random.randint(1, 5)

            if args.task == "noise":
                params = get_distortion_parameter("GNC", dist_level)
                img = gaussian_noise_color(img, params)
            elif args.task == "block":
                params = get_distortion_parameter("BW", dist_level)
                img = block_wise(img, params)
            elif args.task == "saturation":
                params = get_distortion_parameter("CS", dist_level)
                img = color_saturation(img, params)
            elif args.task == "contrast":
                params = get_distortion_parameter("CC", dist_level)
                img = color_contrast(img, params)
            elif args.task == "blur":
                params = get_distortion_parameter("GB", dist_level)
                img = gaussian_blur(img, params)
            elif args.task == "pixel":
                params = get_distortion_parameter("JPEG", dist_level)
                img = jpeg_compression(img, params)
            elif args.task == "compression":
                params = get_distortion_parameter("VC", dist_level)
                img = video_compression(img, params)
            res = dest + file.split("/")[-2]

            if not os.path.exists(res):
                os.makedirs(res)
            # print(dest+('/').join(file.split('/')[-2:]))
            Image.fromarray(img).save(res + "/" + file.split("/")[-1])