#!/usr/bin/env python

import functools
import numpy as np
import os
import sys

from PIL import Image


def print_error(msg: str) -> None:
    print('\x1b[1;31m[ERR]' + msg + '\x1b[0m', file=sys.stderr)


def main():
    if len(sys.argv) < 2:
        print_error('Expected path to images as argument')
        sys.exit(1)

    # Load images
    input_dir = sys.argv[1]
    images = [np.asarray(Image.open(os.path.join(input_dir, x))) for x in os.listdir(input_dir)]

    # Max image
    max_image = functools.reduce(np.maximum, images)


if __name__ == '__main__':
    main()