import { Discount } from "../../model/discount";
import { Tariff } from "../../model/tariff";
import { calcCart } from "./calcCart";


export function calcTariffPrice(
    targetTariff: Tariff,
    discounts: Discount[],
    purchasesAmount: number,
    currentTariffs: Tariff[],
    isUserNko: boolean,
    userId: string,
): {
    priceBeforeDiscounts: number;
    priceAfterDiscounts: number;
} {
    const priceBeforeDiscounts = targetTariff.price || targetTariff.privileges.reduce(
        (sum, privilege) => sum + privilege.amount * privilege.price,
        0
    );

    const cart = calcCart([...currentTariffs, targetTariff], discounts, purchasesAmount, userId, isUserNko);

    const tariffCartData = cart.services.flatMap(service => service.tariffs).find(tariff => tariff.id === targetTariff._id);
    if (!tariffCartData) throw new Error(`Target tariff ${targetTariff._id} not found in cart`);

    return {
        priceBeforeDiscounts,
        priceAfterDiscounts: tariffCartData.price,
    };
}