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dist/expense-engine.service.js

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+"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;
+//# sourceMappingURL=expense-engine.service.js.map