Sven (AAMOS AI)
60 lines
1.8 KiB
TypeScript
60 lines
1.8 KiB
TypeScript
import type { Unit } from "@app/shared-types";
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import { toGrams, type IngredientUnitInfo } from "@app/nutrition-engine";
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export interface CostableIngredient {
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canonicalIngredientId: string;
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quantity: number;
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unit: Unit;
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optional: boolean;
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}
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export interface PriceInfo extends IngredientUnitInfo {
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/** SEK per kg – från kvittohistorik, användardata eller standardvärde (spec §26). */
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pricePerKgMinor: number;
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source: "receipt_history" | "user" | "default";
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}
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export interface CostEstimate {
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totalMinor: number | null;
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perPortionMinor: number | null;
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/** Andel av ingredienserna (viktat) som hade prisdata. */
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priceCoverage: number;
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sourcesUsed: PriceInfo["source"][];
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}
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/** Kostnadsuppskattning per portion – alltid märkt som uppskattning. */
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export function estimateCost(
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ingredients: CostableIngredient[],
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portions: number,
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prices: Map<string, PriceInfo>,
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): CostEstimate {
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let total = 0;
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let pricedCount = 0;
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let mandatoryCount = 0;
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const sources = new Set<PriceInfo["source"]>();
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for (const ing of ingredients) {
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if (ing.optional) continue;
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mandatoryCount += 1;
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const price = prices.get(ing.canonicalIngredientId);
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if (!price) continue;
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const grams = toGrams(ing.quantity, ing.unit, price);
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if (grams == null) continue;
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total += (grams / 1000) * price.pricePerKgMinor;
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pricedCount += 1;
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sources.add(price.source);
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}
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if (pricedCount === 0 || mandatoryCount === 0) {
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return { totalMinor: null, perPortionMinor: null, priceCoverage: 0, sourcesUsed: [] };
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}
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const coverage = pricedCount / mandatoryCount;
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return {
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totalMinor: Math.round(total),
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perPortionMinor: portions > 0 ? Math.round(total / portions) : null,
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priceCoverage: Math.round(coverage * 100) / 100,
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sourcesUsed: [...sources],
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};
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}
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