/**
 * Pure helper functions for computing quote prices, protection amounts, and extras.
 */
import type { Quote } from '../../../types';

/**
 * Compute the final net/gross price for a quote, factoring in protection extras.
 * Returns values in major currency units (i.e. divided by 100).
 */
export function computeFinalPrice(
	quote: Quote,
	fullyProtection: boolean,
): { net: number; gross: number } {
	const { price, availableExtras } = quote;
	if (fullyProtection) {
		const full = availableExtras.find((e) => e.key === 'protection:full')?.price;
		if (full) {
			return {
				net: (price.net + full.net) / 100,
				gross: (price.gross + full.gross) / 100,
			};
		}
	}
	const base = availableExtras.find((e) => e.key === 'protection:base')?.price;
	if (base) {
		return {
			net: (price.net + base.net) / 100,
			gross: (price.gross + base.gross) / 100,
		};
	}
	return { net: price.net / 100, gross: price.gross / 100 };
}

/**
 * Compute the protected amount for a quote based on protection level.
 */
export function computeProtectedAmount(quote: Quote, fullyProtection: boolean): number {
	const { availableExtras, service } = quote;
	const protectionExtra = fullyProtection
		? availableExtras.find((e) => e.key === 'protection:full') ||
			availableExtras.find((e) => e.key === 'protection:base')
		: availableExtras.find((e) => e.key === 'protection:base');
	if (!protectionExtra) return service.includedProtection || 0;
	return protectionExtra.metadata?.protectedAmount || 0;
}

/**
 * Build the list of extra keys to include in a booking, based on protection level.
 */
export function buildExtras(quote: Quote, fullyProtection: boolean): string[] {
	const extras: string[] = [];
	if (fullyProtection && quote.availableExtras.find((e) => e.key === 'protection:full')) {
		extras.push('protection:full');
	} else if (quote.availableExtras.find((e) => e.key === 'protection:base')) {
		extras.push('protection:base');
	}
	return extras;
}