/**
 * Releasing several products at once must not give them all one price.
 *
 * `publishproduct` writes `products.retailprice` as well as the per-outlet
 * price, at every branch. So publishing the seventeen products R mart imported
 * on 2026-08-31 — ₹395 rice, ₹30 crisps, ₹105 cleaner — with the single figure
 * a dialog prefilled from the first row would have set all seventeen to ₹395 and
 * left nothing to restore the real prices from.
 *
 * Each product now has its own field, so these tests pin two things: that a
 * figure typed into one row stays in that row, and that nothing is released
 * without a price at all.
 */
import assert from 'node:assert/strict';
import { test } from 'node:test';
import {
  needingPrice,
  planPublishEach,
  priceFieldFor,
  taxFieldFor,
  unpricedIn,
  type TypedPrice,
} from './publishPlan';
import type { Product } from '@/api/types';

const product = (id: number, price: number, retail = 0, tax?: number) =>
  ({
    productid: id,
    price,
    retailprice: retail,
    ...(tax === undefined ? {} : { taxpercent: tax }),
  }) as Product;

/** What the drawer holds once every row has been prefilled and none edited. */
const asOpened = (products: Product[]): Map<number, TypedPrice> =>
  new Map(
    products.map((p) => [p.productid, { price: priceFieldFor(p), taxpercent: taxFieldFor(p) }]),
  );

/* ── A typed figure stays in the row it was typed into ────────────────────── */

test('each product is released at its own price', () => {
  const products = [product(7089, 395), product(7103, 30), product(7104, 105)];
  const plan = planPublishEach(products, asOpened(products));
  assert.deepEqual(
    plan.map((line) => line.price),
    [395, 30, 105],
  );
});

// The failure this guards: three products released together, all set to
// whichever figure prefilled from the first.
test('editing one row does not move the other prices', () => {
  const products = [product(1, 395), product(2, 30), product(3, 105)];
  const typed = asOpened(products);
  typed.set(1, { price: '999', taxpercent: '5' });
  const plan = planPublishEach(products, typed);
  assert.deepEqual(
    plan.map((line) => line.price),
    [999, 30, 105],
  );
});

// One product is an edit of that product: the merchant is looking at its price,
// has typed another, and means it. `own > 0 ? own : typed` made that impossible
// — a price could be set once and never corrected.
test('a typed price replaces the one the product already had', () => {
  const products = [product(7, 395)];
  const typed = new Map([[7, { price: '250', taxpercent: '12' }]]);
  const [line] = planPublishEach(products, typed);
  assert.equal(line?.price, 250);
  assert.equal(line?.taxpercent, 12);
});

/* ── Prefill: what a row starts at ────────────────────────────────────────── */

// The per-outlet price and the tenant master are two columns and either can hold
// the figure — an imported product carries both, a hand-priced one may carry
// only the master. `effectivePrice` resolves that, and the prefill has to use
// the same resolution or it would ask for a price that already exists.
test('the master price counts as having a price', () => {
  assert.equal(priceFieldFor(product(1, 0, 175)), '175');
  assert.equal(priceFieldFor(product(2, 0)), '', 'nothing to prefill, so the field is empty');
});

// Zero-rated goods are real — unpackaged staples are 0% GST — so 0 must show as
// a rate rather than as an empty field meaning "not set".
test('a tax rate of zero is shown, not treated as missing', () => {
  assert.equal(taxFieldFor(product(1, 100, 0, 0)), '0');
  const plan = planPublishEach([product(1, 100, 0, 0)], asOpened([product(1, 100, 0, 0)]));
  assert.equal(plan[0]?.taxpercent, 0);
});

// An empty tax field is zero-rated, which is a real answer. An empty PRICE
// field is not — see below.
test('an empty tax field releases at zero per cent rather than blocking', () => {
  const plan = planPublishEach([product(1, 100)], new Map([[1, { price: '100', taxpercent: '' }]]));
  assert.equal(plan[0]?.taxpercent, 0);
});

/* ── Nothing is released without a price ──────────────────────────────────── */

test('a product with no price of its own is named as needing one', () => {
  assert.equal(needingPrice([product(1, 395), product(2, 0), product(3, 0, 88)]).length, 1);
});

test('an unpriced row blocks the release until it is filled', () => {
  const products = [product(1, 395), product(2, 0)];
  const typed = asOpened(products);
  assert.deepEqual(
    unpricedIn(products, typed).map((p) => p.productid),
    [2],
  );
  typed.set(2, { price: '60', taxpercent: '5' });
  assert.deepEqual(unpricedIn(products, typed), []);
});

// Clearing a field is not "keep what it had". What the row shows is what gets
// written, so an emptied field is no price and the release stops.
test('clearing a prefilled price blocks the release rather than reverting', () => {
  const products = [product(1, 395)];
  const typed = new Map([[1, { price: '', taxpercent: '5' }]]);
  assert.equal(unpricedIn(products, typed).length, 1);
});

test('zero and a negative are refused as prices, not sent', () => {
  const products = [product(1, 0), product(2, 0)];
  const typed = new Map([
    [1, { price: '0', taxpercent: '0' }],
    [2, { price: '-5', taxpercent: '0' }],
  ]);
  assert.equal(unpricedIn(products, typed).length, 2, 'a till cannot ring up ₹0 or less');
});

test('a price that is not a number at all is refused', () => {
  const products = [product(1, 0)];
  assert.equal(unpricedIn(products, new Map([[1, { price: 'abc', taxpercent: '0' }]])).length, 1);
});