import pygame

from .static import INTERNAL_WIDTH, INTERNAL_HEIGHT

class Scaling():
    factor = 0.02
    left = 0
    top = 0
    
    @staticmethod
    def area_to_rect(area: tuple) -> pygame.Rect:
        """ converts area coordinates to pygame.Rect"""
        return pygame.Rect(
                area[0] * __class__.factor + __class__.left,
                area[1] * __class__.factor + __class__.top,
                area[2] * __class__.factor,
                area[3] * __class__.factor)

    @staticmethod
    def scale_coordinates(coords: tuple ) -> tuple:
        return (
                coords[0] * __class__.factor + __class__.left,
                coords[1] * __class__.factor + __class__.top)

    @staticmethod
    def update_scaling(size: tuple) -> None:
        if size[0] / size[1] <= INTERNAL_WIDTH / INTERNAL_HEIGHT:
            __class__.factor = size[0] / INTERNAL_WIDTH
            __class__.left = 0
            __class__.top = (size[1] - INTERNAL_HEIGHT * __class__.factor) // 2
        else:
            __class__.factor = size[1] / INTERNAL_HEIGHT
            __class__.left = (size[0] - INTERNAL_WIDTH * __class__.factor) // 2
            __class__.top = 0