"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.ExpenseEngine = void 0;
const common_1 = require("@nestjs/common");
class ExpenseEngine {
    calculateSplit(totalCost, adultCount, childCount, childDiscountPercent) {
        if (totalCost < 0 || adultCount < 0 || childCount < 0 || childDiscountPercent < 0) {
            throw new common_1.BadRequestException('Dữ liệu đầu vào không được là số âm.');
        }
        if (childDiscountPercent > 100) {
            throw new common_1.BadRequestException('Phần trăm giảm giá không thể vượt quá 100%.');
        }
        if (adultCount + childCount === 0) {
            throw new common_1.BadRequestException('Số lượng người tham gia phải lớn hơn 0.');
        }
        const discountRate = childDiscountPercent / 100;
        const childRateFactor = 1 - discountRate;
        const weightedParticipantCount = adultCount + (childCount * childRateFactor);
        const adultPriceRaw = totalCost / weightedParticipantCount;
        const childPriceRaw = adultPriceRaw * childRateFactor;
        const perAdult = Math.round(adultPriceRaw);
        const perChild = Math.round(childPriceRaw);
        const adultsTotal = perAdult * adultCount;
        const childrenTotal = perChild * childCount;
        const actualSum = adultsTotal + childrenTotal;
        return {
            targetTotal: totalCost,
            actualTotal: actualSum,
            perAdult,
            perChild,
            roundingDifference: totalCost - actualSum,
            adultsTotal,
            childrenTotal,
        };
    }
}
exports.ExpenseEngine = ExpenseEngine;
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