from typing import Callable

SortStrategy = Callable[[list], list]

def asc_sort(items: list) -> list:
    return sorted(items)

def desc_sort(items: list) -> list:
    return sorted(items, reverse = True)

def by_length_sort(items: list) -> list:
    return sorted(items, key=len)

class Sorter:
    def __init__(self, strategy: SortStrategy = asc_sort):
        self.strategy = strategy
    
    def sort(self, data: list) -> list:
        return self.strategy(data)
    
    def set_strategy(self, strategy: SortStrategy) -> None:
        self.strategy = strategy 

def sort_with_strategy(items: list[str], strategy: str) -> list[str]:
    # Define un diccionario de estrategias de ordenación
    # y aplica la que corresponde al parámetro strategy.
    match strategy:
        case "asc":
            sorter = Sorter(asc_sort)
        case "desc":
            sorter = Sorter(desc_sort)
        case "by_length":
            sorter = Sorter(by_length_sort)
        case _:
            return None

    return sorter.sort(items)