formatter.ts

import type { NotificationData, NotificationType, PossibleNotificationType } from "./types";

export function getMessageTitle<T extends PossibleNotificationType>(type: NotificationType<T>): string {
	switch(type.name){
		case "buy": {
			return "Dein Einkauf";
		}
		case "refund": {
			return "Geld erstattet";
		}
		case "deposit": {
			return "Geld eingezahlt";
		}
		case "withdraw": {
			return "Geld ausgezahlt";
		}
		case "use-voucher": {
			return "Gutschein eingelöst";
		}
		case "send-transfer": {
			return "Überweisung gesendet";
		}
		case "receive-transfer": {
			return "Überweisung erhalten";
		}
		default: {
			console.error(`Unknown notification type`, type);
			return `Unknown notification type ${type}`;
		}
	}
}			

export function formatMessage<T extends PossibleNotificationType>(type: NotificationType<T>, data: NotificationData<T>): string {
	switch(type.name){
		case "buy": {
			const {total, items, balanceBefore, balanceAfter} = data as NotificationData<"buy">;
			const premiums = items.filter(item => item.premium && item.premium > 0).map(item => item.premium).reduce((a,b) => a+b, 0);
			return `Du hast folgende ${items.length} Artikel gekauft:
${items.map(item => `- ${item.name} (${item.code}) - ${(item.price/100).toFixed(2)}€` + (item.premium && item.premium > 0 ? ` (+${(item.premium/100).toFixed(2)}€)` : "")).join("\n")}
Gesamt: ${(total/100).toFixed(2)}€` + (premiums > 0 ? ` (davon ${(premiums/100).toFixed(2)}€ Negativaufschlag)` : "") + `\nDein neuer Kontostand beträgt ${(balanceAfter/100).toFixed(2)}€.`;
		}
		case "refund": {
			const {refund, item, balanceBefore, balanceAfter, timeBought} = data as NotificationData<"refund">;
			return `Dir wurden ${(refund/100).toFixed(2)}€ für ${item.name} (${item.code}) erstattet, gekauft am ${timeBought.toLocaleString()}.
Dein neuer Kontostand beträgt ${(balanceAfter/100).toFixed(2)}€.`;
		}
		case "deposit": {
			const {amount, balanceBefore, balanceAfter} = data as NotificationData<"deposit">;
			return `Du hast ${(amount/100).toFixed(2)}€ eingezahlt.
Dein neuer Kontostand beträgt ${(balanceAfter/100).toFixed(2)}€.`;
		}
		case "withdraw": {
			const {amount, balanceBefore, balanceAfter} = data as NotificationData<"withdraw">;
			return `Du hast ${(amount/100).toFixed(2)}€ ausgezahlt.
Dein neuer Kontostand beträgt ${(balanceAfter/100).toFixed(2)}€.`;
		}
		case "use-voucher": {
			const {voucher, balanceBefore, balanceAfter} = data as NotificationData<"use-voucher">;
			return `Du hast einen Gutschein im Wert von ${(voucher.value/100).toFixed(2)}€ eingelöst.
Dein neuer Kontostand beträgt ${(balanceAfter/100).toFixed(2)}€.`;
		}
		case "send-transfer": {
			const {amount, balanceBefore, balanceAfter, receiver} = data as NotificationData<"send-transfer">;
			return `Du hast ${(amount/100).toFixed(2)}€ an ${receiver.name} überwiesen.
Dein neuer Kontostand beträgt ${(balanceAfter/100).toFixed(2)}€.`;
		}
		case "receive-transfer": {
			const {amount, balanceBefore, balanceAfter, sender} = data as NotificationData<"receive-transfer">;
			return `Du hast ${(amount/100).toFixed(2)}€ von ${sender.name} erhalten.
Dein neuer Kontostand beträgt ${(balanceAfter/100).toFixed(2)}€.`;
		}
		default: {
			console.error(`Unknown notification type`, type);
			return `Unknown notification type ${type}`;
		}
	}
}