front-hub/src/utils/calcTariffPrices.ts

import { ServiceKeyToPrivilegesMap } from "@root/model/privilege";
import { CartData, Discount, Tariff, findCartDiscount, findLoyaltyDiscount, findPrivilegeDiscount, findServiceDiscount } from "@frontend/kitui";


export function calcIndividualTariffPrices(
    tariff: Tariff,
    discounts: Discount[],
    privilegies: ServiceKeyToPrivilegesMap,
    purchasesAmount: number,
    cart: CartData,
): {
    price: number | undefined;
    tariffPriceAfterDiscounts: number | undefined;
} {
    let price = tariff.price || tariff.privilegies.reduce((sum, privilege) => sum + privilege.amount * privilege.price, 0);

    let tariffPriceAfterDiscounts = tariff.privilegies.reduce((sum, privilege) => {
        let privilegePrice = privilege.amount * privilege.price;

        let realprivilegie = privilegies[privilege.serviceKey].find(e => e._id === privilege.privilegeId);
        if (realprivilegie) privilege.privilegeId = realprivilegie.privilegeId;

        const privilegeDiscount = findPrivilegeDiscount(privilege.privilegeId, privilege.price * privilege.amount, discounts);
        privilegePrice *= privilegeDiscount.factor;

        const serviceCartData = cart.services.find(e => e.serviceKey === privilege.serviceKey);
        let serviceprice = 0;
        if (serviceCartData) serviceprice = serviceCartData.price;

        const serviceDiscount = findServiceDiscount(privilege.serviceKey, privilegePrice + serviceprice, discounts);
        if (serviceDiscount) privilegePrice *= serviceDiscount.factor;

        return sum + privilegePrice;
    }, 0);

    const cartDiscount = findCartDiscount(tariffPriceAfterDiscounts + cart.priceAfterDiscounts, discounts);
    tariffPriceAfterDiscounts *= cartDiscount.factor;

    const loyalDiscount = findLoyaltyDiscount(purchasesAmount, discounts);
    tariffPriceAfterDiscounts *= loyalDiscount.factor;

    return {
        price,
        tariffPriceAfterDiscounts: tariffPriceAfterDiscounts,
    };
}