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import {
PromotionType,
DistributionType,
ProductType,
ImageType,
ExhaustionAlarmPercentages,
YesNo,
PromotionSavingType,
ClientLimitType,
} from "../types";
import {
InvalidPercentageException,
InsufficientBudgetException,
MinimumPaymentNotMetException,
InvalidPointCalculationException,
} from "../exceptions/PromotionExceptions";
/**
* Point Promotion entity
* Handles percentage-based point rewards for purchases
*/
export class PointPromotion extends Promotion {
private promotionName: string;
private promotionBudget: number;
private promotionSavingType: PromotionSavingType;
private promotionSavingRate: number | null;
private promotionSavingPoint: number | null;
private minimumPaymentPriceYn: YesNo;
private minimumPaymentPrice: number;
private maximumSavingPoint: number;
private clientLimitType: ClientLimitType;
private clientLimitTerm: number | null;
private clientLimitCount: number | null;
private clientLimitPoint: number | null;
private usedPoint: number;
private usedPointPercentage: number;
private remainingPoint: number;
private remainingPointPercentage: number;
constructor(params: {
id: string;
title: string;
startDate: Date;
endDate: Date;
promotionType: PromotionType;
distributionType: DistributionType;
productType: ProductType;
imageType: ImageType;
imageObsId: string;
imageObsHash: string;
imageUrl: string;
exhaustionAlarmYn: YesNo;
exhaustionAlarmPercentageList: ExhaustionAlarmPercentages[];
// Point Promotion specific
promotionName: string;
promotionBudget: number;
promotionSavingType: PromotionSavingType;
promotionSavingRate: number | null;
promotionSavingPoint: number | null;
minimumPaymentPriceYn: YesNo;
minimumPaymentPrice: number;
maximumSavingPoint: number;
clientLimitType: ClientLimitType;
clientLimitTerm: number | null;
clientLimitCount: number | null;
clientLimitPoint: number | null;
usedPoint?: number;
usedPointPercentage?: number;
remainingPoint?: number;
remainingPointPercentage?: number;
}) {
super({
...params,
distributionType: "NA",
});
this.validateSavingRate(
params.promotionSavingRate,
params.promotionSavingType
);
this.validateBudget(params.promotionBudget);
this.promotionName = params.promotionName;
this.promotionBudget = params.promotionBudget;
this.promotionSavingType = params.promotionSavingType;
this.promotionSavingRate = params.promotionSavingRate;
this.promotionSavingPoint = params.promotionSavingPoint;
this.minimumPaymentPriceYn = params.minimumPaymentPriceYn;
this.minimumPaymentPrice = params.minimumPaymentPrice;
this.maximumSavingPoint = params.maximumSavingPoint;
this.clientLimitType = params.clientLimitType;
this.clientLimitTerm = params.clientLimitTerm;
this.clientLimitCount = params.clientLimitCount;
this.clientLimitPoint = params.clientLimitPoint;
this.usedPoint = params.usedPoint ?? 0;
this.usedPointPercentage = params.usedPointPercentage ?? 0;
this.remainingPoint = params.remainingPoint ?? params.promotionBudget;
this.remainingPointPercentage =
params.remainingPointPercentage ?? this.calculateRemainingPercentage();
}
/**
* Validates the saving rate for fixed rate promotions
*/
private validateSavingRate(
rate: number | null,
type: PromotionSavingType
): void {
if (type === "FIXED_RATE" && rate !== null) {
if (rate < 0 || rate > 100) {
throw new InvalidPercentageException(rate);
}
}
}
/**
* Validates the promotion budget
*/
private validateBudget(budget: number): void {
if (budget <= 0) {
throw new InvalidPointCalculationException(
"Promotion budget must be positive"
);
}
}
/**
* Calculates remaining point percentage
*/
private calculateRemainingPercentage(): number {
Iif (this.promotionBudget === 0) {
return 0;
}
return (this.remainingPoint / this.promotionBudget) * 100;
}
/**
* Checks if there are sufficient points remaining
*/
public hasSufficientPoints(requiredPoints: number): boolean {
return this.remainingPoint >= requiredPoints;
}
/**
* Checks if the payment amount meets the minimum requirement
*/
public meetsMinimumPayment(paymentAmount: number): boolean {
if (this.minimumPaymentPriceYn === "Y") {
return paymentAmount >= this.minimumPaymentPrice;
}
return true;
}
/**
* Calculates point reward based on payment amount
*/
public calculatePointReward(paymentAmount: number): number {
if (!this.meetsMinimumPayment(paymentAmount)) {
return 0;
}
let calculatedPoints = 0;
if (
this.promotionSavingType === "FIXED_RATE" &&
this.promotionSavingRate !== null
) {
calculatedPoints = (paymentAmount * this.promotionSavingRate) / 100;
E} else if (
this.promotionSavingType === "FIXED_POINT" &&
this.promotionSavingPoint !== null
) {
calculatedPoints = this.promotionSavingPoint;
}
// Apply maximum saving point cap
calculatedPoints = Math.min(calculatedPoints, this.maximumSavingPoint);
// Ensure we don't exceed remaining budget
calculatedPoints = Math.min(calculatedPoints, this.remainingPoint);
return calculatedPoints;
}
/**
* Applies the point reward for a payment
*/
public applyPointReward(paymentAmount: number): number {
this.ensureActive();
if (!this.meetsMinimumPayment(paymentAmount)) {
throw new MinimumPaymentNotMetException(
this.minimumPaymentPrice,
paymentAmount
);
}
const pointReward = this.calculatePointReward(paymentAmount);
if (pointReward === 0) {
throw new InsufficientBudgetException("No points available for reward");
}
Iif (!this.hasSufficientPoints(pointReward)) {
throw new InsufficientBudgetException(
`Insufficient points. Required: ${pointReward}, Available: ${this.remainingPoint}`
);
}
// Update point tracking
this.usedPoint += pointReward;
this.remainingPoint -= pointReward;
this.usedPointPercentage = (this.usedPoint / this.promotionBudget) * 100;
this.remainingPointPercentage = this.calculateRemainingPercentage();
return pointReward;
}
/**
* Calculates the usage percentage of the promotion budget
*/
public calculateUsagePercentage(): number {
return this.usedPointPercentage;
}
/**
* Checks if the promotion can be applied to a payment
*/
public canApply(
paymentAmount: number,
currentDate: Date = new Date()
): boolean {
const pointReward = this.calculatePointReward(paymentAmount);
return (
this.isWithinValidPeriod(currentDate) &&
this.meetsMinimumPayment(paymentAmount) &&
pointReward > 0 &&
this.hasSufficientPoints(pointReward)
);
}
/**
* Checks if client limit allows another use
* Note: This is a simplified version. In production, you'd need to track per-user usage
*/
public canUserApply(userUsageCount: number, userUsedPoints: number): boolean {
if (this.clientLimitType === "NONE") {
return true;
}
if (
this.clientLimitCount !== null &&
userUsageCount >= this.clientLimitCount
) {
return false;
}
if (
this.clientLimitPoint !== null &&
userUsedPoints >= this.clientLimitPoint
) {
return false;
}
return true;
}
// Getters
public getPromotionName(): string {
return this.promotionName;
}
public getPromotionBudget(): number {
return this.promotionBudget;
}
public getPromotionSavingType(): PromotionSavingType {
return this.promotionSavingType;
}
public getPromotionSavingRate(): number | null {
return this.promotionSavingRate;
}
public getPromotionSavingPoint(): number | null {
return this.promotionSavingPoint;
}
public getMinimumPaymentPriceYn(): YesNo {
return this.minimumPaymentPriceYn;
}
public getMinimumPaymentPrice(): number {
return this.minimumPaymentPrice;
}
public getMaximumSavingPoint(): number {
return this.maximumSavingPoint;
}
public getClientLimitType(): ClientLimitType {
return this.clientLimitType;
}
public getClientLimitTerm(): number | null {
return this.clientLimitTerm;
}
public getClientLimitCount(): number | null {
return this.clientLimitCount;
}
public getClientLimitPoint(): number | null {
return this.clientLimitPoint;
}
public getUsedPoint(): number {
return this.usedPoint;
}
public getRemainingPoint(): number {
return this.remainingPoint;
}
public getUsedPointPercentage(): number {
return this.usedPointPercentage;
}
public getRemainingPointPercentage(): number {
return this.remainingPointPercentage;
}
}
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