import pygame
import random


class Cloud:
    def __init__(self, pos: tuple[float, float], img: pygame.Surface, speed: float, depth: float):
        self.pos: list[float] = list(pos)
        self.image: pygame.Surface = img
        self.speed: float = speed
        self.depth: float = depth

    def update(self) -> None:
        self.pos[0] += self.speed

    def render(self, surface: pygame.Surface, offset: tuple[int, int] = (0, 0)) -> None:
        render_pos = (self.pos[0] - offset[0] * self.depth, self.pos[1] - offset[1] * self.depth)

        surface.blit(self.image,
                            (render_pos[0] % (surface.get_width() + self.image.get_width()) - self.image.get_width(),
                            render_pos[1] % (surface.get_height() + self.image.get_height()) - self.image.get_height())
                            )


class Clouds:
    def __init__(self, cloud_images: list[pygame.Surface], count: int = 16):
        self.clouds: list[Cloud] = []
        for _ in range(count):
            self.clouds.append(Cloud((random.random() * 99999, random.random() * 99999),
                                     random.choice(cloud_images),
                                     (random.random() * 0.05 + 0.05) * 1,
                                     random.random() * 0.6 + 0.2))
        self.clouds.sort(key=lambda x: x.depth)

    def update(self) -> None:
        for cloud in self.clouds:
            cloud.update()

    def render(self, surface: pygame.Surface, offset: tuple[int, int] = (0, 0)) -> None:
        for cloud in self.clouds:
            cloud.render(surface, offset)