import { CustomTariffUserValues } from "../../model/customTariffs";
import { Discount } from "../../model/discount";
import { CustomPrivilegeWithAmount } from "../../model/privilege";
import { Tariff } from "../../model/tariff";
import { calcCart } from "./calcCart";


export function calcCustomTariffPrice(
    customTariffUserValues: CustomTariffUserValues,
    servicePrivileges: CustomPrivilegeWithAmount[],
    cartTariffs: Tariff[],
    discounts: Discount[],
    purchasesAmount: number,
    isUserNko: boolean,
    userId: string,
) {
    const privileges = new Array<CustomPrivilegeWithAmount>();

    const priceBeforeDiscounts = servicePrivileges.reduce((price, privilege) => {
        const amount = customTariffUserValues?.[privilege._id] ?? 0;
        return price + privilege.price * amount;
    }, 0);

    Object.keys(customTariffUserValues).forEach(privilegeId => {
        const pwa = servicePrivileges.find(p => p._id === privilegeId);
        if (!pwa) return;
        if (customTariffUserValues[privilegeId] > 0) privileges.push({
            ...pwa,
            amount: customTariffUserValues[privilegeId]
        });
    });

    const customTariff: Tariff = {
        _id: crypto.randomUUID(),
        name: "",
        price: 0,
        description: "",
        isCustom: true,
        isDeleted: false,
        privileges: privileges,
    };

    const cart = calcCart([...cartTariffs, customTariff], discounts, purchasesAmount, userId, isUserNko);

    const customService = cart.services.flatMap(service => service.tariffs).find(tariff => tariff.id === customTariff._id);
    if (!customService) throw new Error("Custom service not found in cart");

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