"""Сервис заказов демо-проекта ci-demo (СТРПО, неделя 9, Gitea edition)."""
from dataclasses import dataclass

from .discounts import Discount


@dataclass
class Order:
    items: dict[str, float]

    @property
    def total(self) -> float:
        return sum(self.items.values())


class OrderService:
    def __init__(self, discount: Discount) -> None:
        self.discount = discount

    def total(self, order: Order) -> float:
        return round(self.discount.apply(order.total), 2)