from PIL import Image
from pathlib import Path
from io import BytesIO
from collections import namedtuple
from enum import Enum
import requests

Dimensions = namedtuple('Dimensions', ['width', 'height'])


def import_from_path(path: Path) -> Image:
    return Image.open(path)


def import_from_url(url: str) -> Image:
    r = requests.get(url)
    return Image.open(BytesIO(r.content))


def convert_to_black_white(im: Image) -> Image:
    return im.convert('1')


def convert_to_grayscale(im: Image) -> Image:
    return im.convert('L')


def resize(im: Image, size: Dimensions) -> Image:
    return im.resize(size)


def align_horizontal(images: list[Image]) -> Image:
    largeur_totale = sum(im.width for im in images)
    hauteur_max = max(images, key=lambda im: im.height).height
    dst = Image.new(images[0].mode, (largeur_totale, hauteur_max))

    largeur = 0
    for img in images:
        dst.paste(img, (largeur, 0))
        largeur += img.width
    return dst


def align_vertical(images: list[Image]) -> Image:
    hauteur_totale = sum(im.height for im in images)
    largeur_max = max(images, key=lambda im: im.width).width
    dst = Image.new(images[0].mode, (largeur_max, hauteur_totale))

    hauteur = 0
    for img in images:
        dst.paste(img, (0, hauteur))
        hauteur += img.height
    return dst


def fusion_image(im1: Image, im2: Image, opacity: float = 0.5) -> Image:
    assert im1.mode == im2.mode, f'Image mode must be the same {im1.mode} != {im2.mode}'
    return Image.blend(im1, im2, opacity)


def create_gif(images: list[Image], duration: int = 40):
    images[0].save('animated.gif', save_all=True, append_images=images[1:], duration=duration, loop=0)
    return import_from_path(Path('animated.gif'))


if __name__ == '__main__':
    import_from_url('https://codefirst.iut.uca.fr/git/assets/img/avatar_default.png')