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PricingRules, PricingField, PricingOption, Selections, FieldSelection,
QuoteResult, UnsupportedResult, DiscountGroup,
} from './types.js';
import { applyDiscount } from './discount.js';
import { roundHalfEven } from './round.js';
import { resolveVisibleFields } from './visibility.js';
function unitPriceAt(rules: PricingRules, qty: number): number {
let unitPrice = applyDiscount(rules.product.unitPrice, qty, rules.product.discountGroup);
const mop = rules.product.minimumPrice;
if (qty > 0 && mop && unitPrice * qty < mop) {
unitPrice = mop / qty;
}
return unitPrice;
}
function variationSetupCost(
source: { variationCost: number; variationCostDiscountGroup: DiscountGroup | null },
totalQty: number
): number {
let cost = source.variationCost;
if (source.variationCostDiscountGroup) {
cost = applyDiscount(cost, totalQty, source.variationCostDiscountGroup);
}
return roundHalfEven(cost, 3);
}
function variationUnitCosts(
source: { variationUnitCost: number; variationUnitCostDiscountGroup: DiscountGroup | null },
groupQuantities: number[]
): number[] {
const uc = source.variationUnitCost;
const group = source.variationUnitCostDiscountGroup;
let list: number[];
if (group) {
if (group.groupRestricted) {
list = groupQuantities.map((q) => applyDiscount(uc, q, group));
} else {
const total = groupQuantities.reduce((a, b) => a + b, 0);
const discounted = applyDiscount(uc, total, group);
list = groupQuantities.map(() => discounted);
}
} else {
list = groupQuantities.map(() => uc);
}
return list.map((c) => roundHalfEven(c, 3));
}
function isEmpty(field: PricingField, sel: FieldSelection | undefined): boolean {
if (!sel) return true;
if (field.isSelectable) {
return !sel.selectedOptionIds || sel.selectedOptionIds.length === 0;
}
// Server `is_empty` non-selectable branch is `return not self.value`, so
// numeric 0 is empty (but string '0' stays non-empty, since `not '0'` is False).
return (
sel.value === undefined ||
sel.value === null ||
sel.value === '' ||
sel.value === 0
);
}
function costFactor(
field: PricingField,
sel: FieldSelection | undefined,
groupQuantities: number[]
): { setup: number; unitList: number[] } {
const n = groupQuantities.length;
if (isEmpty(field, sel)) {
return { setup: 0, unitList: new Array(n).fill(0) };
}
const totalQty = groupQuantities.reduce((a, b) => a + b, 0);
if (field.isSelectable) {
let setup = 0;
const unitList = new Array(n).fill(0);
const optById = new Map<number, PricingOption>();
for (const o of field.options) {
optById.set(o.id, o);
if (o.originalId != null) optById.set(o.originalId, o);
}
for (const optId of sel!.selectedOptionIds!) {
const opt = optById.get(optId);
if (!opt) continue;
setup += variationSetupCost(opt, totalQty);
const ucs = variationUnitCosts(opt, groupQuantities);
for (let i = 0; i < n; i++) unitList[i] += ucs[i];
}
return { setup, unitList };
}
return {
setup: variationSetupCost(field, totalQty),
unitList: variationUnitCosts(field, groupQuantities),
};
}
export function estimateQuote(
rules: PricingRules,
selections: Selections
): QuoteResult | UnsupportedResult {
if (rules.unsupported) {
return { unsupported: rules.unsupported };
}
const visible = resolveVisibleFields(rules, selections);
const groupCosts: number[] = [];
let cost = 0;
let costPerUnit: number;
let groupQuantities: number[];
// Mirror the server's `update_group_variations_cost_and_job_cost`
// (jobs.py ~3321): the group-vs-single branch keys off whether the *job*
// actually has variation groups (`if self.variations_groups:`), NOT the
// product's `hasGroups` capability. A group-capable product with no groups
// submitted is priced as a single non-group job (the server's `else` branch
// sets `group_quantities = [self.quantity or 0]`).
const groups = selections.groups || [];
if (groups.length > 0) {
groupQuantities = groups.map((g) => g.quantity || 0);
const totalQty = groupQuantities.reduce((a, b) => a + b, 0);
const restricted = Boolean(rules.product.discountGroup?.groupRestricted);
const baseUnitPrice = unitPriceAt(rules, totalQty);
const perGroupCpu: number[] = [];
for (const group of groups) {
const gQty = group.quantity || 0;
const cpu = restricted ? unitPriceAt(rules, gQty) : baseUnitPrice;
perGroupCpu.push(cpu);
// Server `VariationsGroups.update_cost` (variations_groups.py ~238):
// `if not self.quantity: self.group_cost = 0; return` — a zero-qty group
// contributes exactly 0 and adds NO field/variation costs.
if (!gQty) {
groupCosts.push(0);
continue;
}
let groupVariationCost = 0;
for (const field of rules.groupFields) {
if (!visible.has(field.id)) continue;
const { setup, unitList } = costFactor(field, group.fieldValues[field.id], [gQty]);
groupVariationCost += setup + unitList[0] * gQty;
}
const groupCost = gQty * cpu + groupVariationCost;
groupCosts.push(groupCost);
cost += groupCost;
}
costPerUnit = totalQty > 0
? perGroupCpu.reduce((acc, cpu, i) => acc + cpu * groupQuantities[i], 0) / totalQty
: baseUnitPrice;
for (const field of rules.fields) {
if (!visible.has(field.id)) continue;
const { setup, unitList } = costFactor(field, selections.fieldValues[field.id], groupQuantities);
const unitTotal = unitList.reduce((acc, uc, i) => acc + uc * groupQuantities[i], 0);
cost += setup + unitTotal;
}
} else {
const qty = selections.quantity || 0;
groupQuantities = [qty];
costPerUnit = unitPriceAt(rules, qty);
cost = costPerUnit * qty;
for (const field of rules.fields) {
if (!visible.has(field.id)) continue;
const { setup, unitList } = costFactor(field, selections.fieldValues[field.id], groupQuantities);
cost += setup + unitList[0] * qty;
}
}
// Server `Jobs.update_cost` (jobs.py ~3452-3454) accumulates `self.cost` at
// full precision and computes `self.tax_amount = tax(self.cost, ...)` on the
// UNROUNDED cost (money_protocol.py `tax` does NOT round). `cost` and
// `taxAmount` are then rounded INDEPENDENTLY at serialization to 2dp
// (jobs.py ~2169-2171). So tax must be derived from the unrounded cost.
const unroundedCost = cost;
const roundedCost = roundHalfEven(unroundedCost, 2);
const unroundedTax = (unroundedCost * rules.taxPercent) / 100;
const taxAmount = roundHalfEven(unroundedTax, 2);
return {
costPerUnit: roundHalfEven(costPerUnit, 3),
cost: roundedCost,
taxAmount,
// `totalCost` mirrors `Jobs.all_total_cost` = `self.cost + self.tax_amount`
// (jobs.py ~1724), serialized UNROUNDED at jobs.py ~1899. We round to 3dp to
// strip float noise while matching the server's effective Numeric scale.
totalCost: roundHalfEven(unroundedCost + unroundedTax, 3),
// `result["groupCost"] = self.group_cost` is serialized UNROUNDED
// (variations_groups.py ~154); round to 3dp to match the Numeric scale.
groupCosts: groupCosts.map((c) => roundHalfEven(c, 3)),
currency: rules.currency,
};
}
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