import { UserSubscription } from './models/user-subscription';
import { resolvePrintOfferName } from './helpers/offer';

export class OfferNameResolver {

	/**
	 * Attempt to resolve to an offer name without specifying an Offer ID
	 * @param subscription A UserSubscription instance
	 * @param isTrialist Whether the user is still a trialist
	 */
	static resolveBySubscription(subscription: UserSubscription | null, isTrialist: boolean): string | undefined {
		if (!subscription) return undefined;

		if (subscription?.productName == 'FT Edit') {
			return subscription?.productName
		}

		if (subscription.isNewsletterOnlyProduct) {
			return subscription.productName;
		}

		const digitalName = subscription.isPremiumProduct ? 'Premium Digital' : 'Standard Digital';
		const printName = resolvePrintOfferName(subscription);

		// For digital subscriptions excluding FT Edit
		if (subscription.isDigitalProduct && !subscription.isFTEditProduct) {
			let subscriptionName = isTrialist ? 'Trial: ' : '';
			subscriptionName += digitalName;
			return subscriptionName;
		}

		const nameSegments = [];
		// For all other subs, calculate the full name
		// Digital deliberately missing here as digital subs follow a different format
		if (subscription.isPrintProduct) nameSegments.push(printName);
		if (subscription.isEpaperProduct) {
			if (subscription.isEpaperBundleProduct) {
				nameSegments.push(printName)
			} else {
				nameSegments.push('FT Digital Edition');
			}
		}
		if (subscription.isFTEditProduct) nameSegments.push('FT Edit');
		if (subscription.isBundleProduct) nameSegments.push(`${printName} + ${digitalName}`);
		if (isTrialist) nameSegments.push('Introductory Offer');

		return nameSegments.join(' ');
	}

}