feat(prices): fiyat kayıtları, birim fiyat motoru ve analizde aylık maliyet

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/features/prices/actions.ts

@@ -0,0 +1,44 @@
+"use server";
+
+import { revalidatePath } from "next/cache";
+import { z } from "zod";
+import { tr } from "@/i18n/tr";
+import { fail, type ActionResult } from "@/lib/action-result";
+import { getHouseholdActionContext } from "@/lib/dal";
+import { productPriceFormSchema } from "@/shared/schemas/product-price";
+import { addProductPrice, deleteProductPrice } from "./service";
+
+const idSchema = z.string().regex(/^[a-f0-9]{24}$/i);
+
+function fieldErrors(error: z.ZodError) {
+  const out: Record<string, string> = {};
+  for (const issue of error.issues) {
+    const key = issue.path.join(".");
+    if (key && !out[key]) out[key] = issue.message;
+  }
+  return out;
+}
+
+async function run<T, R>(
+  schema: z.ZodType<T>,
+  input: unknown,
+  fn: (userId: string, householdId: string, data: T) => Promise<ActionResult<R>>,
+): Promise<ActionResult<R>> {
+  const ctx = await getHouseholdActionContext("member");
+  if (!ctx) return fail(tr.common.unauthorized);
+  const parsed = schema.safeParse(input);
+  if (!parsed.success) return fail(tr.adminUsers.errors.checkFields, fieldErrors(parsed.error));
+  const result = await fn(ctx.user.id, ctx.household.id, parsed.data);
+  if (result.ok) revalidatePath("/", "layout");
+  return result;
+}
+
+export async function addProductPriceAction(input: unknown) {
+  return run(productPriceFormSchema, input, (u, h, d) => addProductPrice(u, h, d));
+}
+
+export async function deleteProductPriceAction(priceId: unknown) {
+  const id = idSchema.safeParse(priceId);
+  if (!id.success) return fail(tr.common.notFound);
+  return run(z.unknown(), null, (u, h) => deleteProductPrice(u, h, id.data));
+}

src/features/prices/options.ts

@@ -0,0 +1,18 @@
+import type { ProductView } from "@/features/products/service";
+
+/** Fiyat formu ürün seçeneği (birim fiyat önizlemesi için dönüşümle). İstemcide de kullanılır. */
+export type PriceProductOption = {
+  id: string;
+  label: string;
+  packageLabel: string;
+  inTypeUnit: number | null;
+  typeUnit: string;
+};
+
+export const priceProductOption = (p: ProductView): PriceProductOption => ({
+  id: p.id,
+  label: p.label,
+  packageLabel: p.packageLabel,
+  inTypeUnit: p.inTypeUnit,
+  typeUnit: p.typeUnit,
+});

src/features/prices/service.int.test.ts

@@ -0,0 +1,150 @@
+import { afterAll, beforeAll, describe, expect, it } from "vitest";
+import { getStockAnalysis } from "@/features/stock/service";
+import { AuditLogModel } from "@/models/audit-log";
+import { ProductModel } from "@/models/product";
+import { ProductTypeModel } from "@/models/product-type";
+import { StoreModel } from "@/models/store";
+import { todayIstanbul } from "@/shared/dates";
+import { addDays } from "@/shared/recurrence";
+import { productPriceFormSchema } from "@/shared/schemas/product-price";
+import { setupSeededDb, teardownDb } from "@/test/seeded-db";
+import {
+  addProductPrice,
+  deleteProductPrice,
+  getProductPrices,
+  getTypePriceComparison,
+} from "./service";
+
+let ids: Awaited<ReturnType<typeof setupSeededDb>>;
+let cakir = "";
+let ayse = "";
+let zeynep = "";
+let fatma = "";
+const today = todayIstanbul();
+
+beforeAll(async () => {
+  ids = await setupSeededDb();
+  cakir = ids.household("Çakır Ailesi");
+  ayse = ids.user("ayse");
+  zeynep = ids.user("zeynep");
+  fatma = ids.user("fatma");
+});
+afterAll(teardownDb);
+
+const ref = (
+  model: typeof ProductModel | typeof StoreModel | typeof ProductTypeModel,
+  seedRef: string,
+) =>
+  (model as typeof ProductModel)
+    .findOne({ seedRef })
+    .lean()
+    .then((x) => String(x!._id));
+
+describe("birim fiyat karşılaştırması", () => {
+  it("toz deterjan: birim fiyata göre sıralı, en uygun işaretli, süren kampanya", async () => {
+    const c = (await getTypePriceComparison(
+      ayse,
+      cakir,
+      await ref(ProductTypeModel, "toz-deterjan"),
+    ))!;
+    expect(c.typeUnit).toBe("yıkama");
+    const units = c.offers.map((o) => o.unitPriceMinor!);
+    expect(units).toEqual([...units].sort((a, b) => a - b));
+    expect(c.offers[0]!.cheapest).toBe(true);
+    expect(c.offers.filter((o) => o.cheapest)).toHaveLength(1);
+    const ariel = c.offers.find(
+      (o) => o.productLabel.startsWith("Ariel") && o.store.label.startsWith("Migros"),
+    )!;
+    expect(ariel.price).toMatchObject({ isPromo: true, promoUntil: addDays(today, 6) });
+    expect(ariel.promoEnded).toBe(false);
+    // Birim fiyat = paket / 33 yıkama.
+    expect(ariel.unitPriceMinor!).toBeCloseTo((ariel.price.priceMinor * 1000) / 33_000, 6);
+    expect(c.products).toHaveLength(3);
+    expect(
+      await getTypePriceComparison(fatma, cakir, await ref(ProductTypeModel, "toz-deterjan")),
+    ).toBeNull();
+  });
+
+  it("süresi biten kampanyada normal fiyata dönülür; eski fiyat işaretlenir", async () => {
+    const sut = (await getProductPrices(ayse, cakir, await ref(ProductModel, "pinar-sut")))!;
+    const a101 = sut.offers.find((o) => o.store.label.startsWith("A101"))!;
+    expect(a101).toMatchObject({ fellBack: true, promoEnded: false });
+    expect(a101.price.isPromo).toBe(false);
+    expect(a101.price.date).toBe(addDays(today, -30));
+    expect(sut.history.some((h) => h.isPromo && h.promoEnded)).toBe(true);
+    expect(sut.series.length).toBeGreaterThanOrEqual(3);
+    expect(sut.points.length).toBeGreaterThan(5);
+
+    const reis = (await getProductPrices(ayse, cakir, await ref(ProductModel, "reis-mercimek")))!;
+    expect(reis.offers.find((o) => o.store.label.startsWith("Metro"))!.stale).toBe(true);
+  });
+});
+
+describe("fiyat girişi", () => {
+  it("ekle, gelecek tarih ve arşivli mağaza reddi, izleyici yazamaz, sil + denetim", async () => {
+    const productId = await ref(ProductModel, "omo-6kg");
+    const storeId = await ref(StoreModel, "sok");
+    const form = (over: Record<string, unknown> = {}) =>
+      productPriceFormSchema.parse({
+        productId,
+        storeId,
+        date: today,
+        price: "449,90",
+        isPromo: false,
+        promoUntil: "",
+        note: "",
+        ...over,
+      });
+    expect(
+      productPriceFormSchema.safeParse({ ...form(), price: "0", isPromo: false }).success,
+    ).toBe(false);
+    expect(
+      productPriceFormSchema.safeParse({
+        productId,
+        storeId,
+        date: today,
+        price: "10",
+        isPromo: true,
+        promoUntil: addDays(today, -1),
+      }).success,
+    ).toBe(false);
+
+    expect((await addProductPrice(ayse, cakir, form({ date: addDays(today, 1) }))).ok).toBe(false);
+    expect((await addProductPrice(zeynep, cakir, form())).ok).toBe(false);
+
+    const r = await addProductPrice(ayse, cakir, form());
+    expect(r.ok).toBe(true);
+    let d = (await getProductPrices(ayse, cakir, productId))!;
+    const sok = d.offers.find((o) => o.store.id === storeId)!;
+    expect(sok.price).toMatchObject({ priceMinor: 449_90, date: today, source: "manual" });
+    // 6 kg = 40 yıkama → 11,2475 TL/yıkama.
+    expect(sok.unitPriceMinor).toBeCloseTo(1124.75, 6);
+
+    const priceId = r.ok ? r.data.id : "";
+    expect((await deleteProductPrice(fatma, cakir, priceId)).ok).toBe(false);
+    expect((await deleteProductPrice(ayse, cakir, priceId)).ok).toBe(true);
+    expect(await AuditLogModel.exists({ action: "price.delete", targetId: priceId })).toBeTruthy();
+    d = (await getProductPrices(ayse, cakir, productId))!;
+    expect(d.history.some((h) => h.id === priceId)).toBe(false);
+
+    await StoreModel.updateOne({ _id: storeId }, { $set: { archivedAt: new Date() } });
+    expect(await addProductPrice(ayse, cakir, form())).toMatchObject({
+      ok: false,
+      fieldErrors: { storeId: expect.any(String) },
+    });
+    await StoreModel.updateOne({ _id: storeId }, { $set: { archivedAt: null } });
+  });
+});
+
+describe("tüketim analizinde maliyet", () => {
+  it("aylık ortalama tüketim × son birim fiyat", async () => {
+    const a = (await getStockAnalysis(ayse, cakir))!;
+    const deterjan = a.rows.find((r) => r.name === "Toz Deterjan")!;
+    expect(deterjan.unitPrice).not.toBeNull();
+    // Maliyet yuvarlanmamış ortalamadan; gösterilen ortalama yuvarlıdır (≤ %1 fark).
+    const expected = (deterjan.avgMonthlyUsed! * deterjan.unitPrice!.minor) / 1000;
+    expect(Math.abs(deterjan.avgMonthlyCostMinor! - expected) / expected).toBeLessThan(0.01);
+    // Ürünü (marka/paket) olmayan tipte maliyet yok.
+    expect(a.rows.find((r) => r.name === "Domates")!.avgMonthlyCostMinor).toBeNull();
+  });
+});

src/features/prices/service.ts

@@ -0,0 +1,436 @@
+import "server-only";
+import { Types } from "mongoose";
+import { hasHouseholdRole } from "@/features/households/roles";
+import { resolveMembership, type Membership } from "@/features/households/service";
+import { listProducts, type ProductView } from "@/features/products/service";
+import { storeLabel } from "@/features/stores/service";
+import { priceProductOption, type PriceProductOption } from "./options";
+import { tr } from "@/i18n/tr";
+import { fail, ok, type ActionResult } from "@/lib/action-result";
+import { writeAudit } from "@/lib/audit";
+import { toObjectId } from "@/lib/object-id";
+import { ProductModel } from "@/models/product";
+import { ProductPriceModel } from "@/models/product-price";
+import { ProductTypeModel } from "@/models/product-type";
+import { StoreModel } from "@/models/store";
+import { todayIstanbul } from "@/shared/dates";
+import {
+  effectivePrice,
+  promoEnded,
+  rankOffers,
+  seriesSlot,
+  unitPrice,
+  type PriceSource,
+  type RankedOffer,
+} from "@/shared/prices";
+import { packageInTypeUnit } from "@/shared/products";
+import type { ProductPriceForm } from "@/shared/schemas/product-price";
+import { compareTr } from "@/shared/search";
+
+/**
+ * Ürün fiyatları (Bölüm 6.11). Hane bazlı; okuma viewer, yazma member. Birim fiyat ürünün
+ * dönüşümüyle okuma sırasında hesaplanır (saf motor: shared/prices).
+ */
+
+const t = tr.productPrices;
+
+type PriceLean = {
+  _id: Types.ObjectId;
+  productId: Types.ObjectId;
+  storeId: Types.ObjectId;
+  date: string;
+  priceMinor: number;
+  isPromo: boolean;
+  promoUntil: string | null;
+  source: PriceSource;
+  note: string;
+  createdAt: Date;
+};
+
+type StoreLean = {
+  _id: Types.ObjectId;
+  name: string;
+  branch: string;
+  archivedAt: Date | null;
+  createdAt: Date;
+};
+
+export type StoreRef = { id: string; label: string; slot: number; archived: boolean };
+
+export type PriceRow = {
+  id: string;
+  productId: string;
+  store: StoreRef;
+  date: string;
+  priceMinor: number;
+  isPromo: boolean;
+  promoUntil: string | null;
+  promoEnded: boolean;
+  source: PriceSource;
+  note: string;
+  /** Ürün tipi biriminde 1 birimin fiyatı (kesirli kuruş; dönüşüm yoksa null). */
+  unitPriceMinor: number | null;
+};
+
+export type StoreOffer = {
+  /** Teklif anahtarı: ürün + mağaza. */
+  key: string;
+  productId: string;
+  productLabel: string;
+  packageLabel: string;
+  store: StoreRef;
+  price: PriceRow;
+  /** Son kayıt süresi biten kampanyaydı; önceki normal fiyat gösteriliyor. */
+  fellBack: boolean;
+  promoEnded: boolean;
+  ageDays: number;
+  stale: boolean;
+  unitPriceMinor: number | null;
+};
+
+export type ProductPriceDetail = {
+  product: ProductView;
+  offers: RankedOffer<StoreOffer>[];
+  /** Tüm kayıtlar, yeniden eskiye. */
+  history: PriceRow[];
+  /** Grafik: mağaza serileri ve tarih noktaları (paket fiyatı, kuruş). */
+  series: StoreRef[];
+  points: Record<string, number | string>[];
+  stores: StoreRef[];
+  canWrite: boolean;
+  today: string;
+};
+
+export type TypePriceComparison = {
+  typeUnit: string;
+  offers: RankedOffer<StoreOffer>[];
+  /** Fiyat girişi seçenekleri. */
+  products: PriceProductOption[];
+  stores: StoreRef[];
+  canWrite: boolean;
+};
+
+/** Hanenin tüm mağazaları; renk yuvası ekleniş sırasına göre sabit. */
+async function loadStores(householdId: Types.ObjectId) {
+  const rows = await StoreModel.find({ householdId })
+    .select({ name: 1, branch: 1, archivedAt: 1, createdAt: 1 })
+    .sort({ createdAt: 1, _id: 1 })
+    .lean<StoreLean[]>();
+  return new Map(
+    rows.map((s, i) => [
+      String(s._id),
+      {
+        id: String(s._id),
+        label: storeLabel(s),
+        slot: seriesSlot(i),
+        archived: Boolean(s.archivedAt),
+      } satisfies StoreRef,
+    ]),
+  );
+}
+
+const sortRecords = (a: PriceLean, b: PriceLean) =>
+  a.date === b.date ? a.createdAt.getTime() - b.createdAt.getTime() : a.date < b.date ? -1 : 1;
+
+async function loadPrices(householdId: Types.ObjectId, productIds: Types.ObjectId[]) {
+  const rows = await ProductPriceModel.find({
+    householdId,
+    productId: { $in: productIds },
+    deletedAt: null,
+  }).lean<PriceLean[]>();
+  return rows.sort(sortRecords);
+}
+
+function toRow(r: PriceLean, store: StoreRef, inTypeUnit: number | null, today: string): PriceRow {
+  return {
+    id: String(r._id),
+    productId: String(r.productId),
+    store,
+    date: r.date,
+    priceMinor: r.priceMinor,
+    isPromo: r.isPromo,
+    promoUntil: r.promoUntil,
+    promoEnded: promoEnded(r, today),
+    source: r.source,
+    note: r.note,
+    unitPriceMinor: inTypeUnit ? unitPrice(r.priceMinor, inTypeUnit) : null,
+  };
+}
+
+/** Ürün × mağaza başına geçerli fiyat teklifleri (sıralanmamış). */
+function offersFor(
+  products: ProductView[],
+  prices: PriceLean[],
+  stores: Map<string, StoreRef>,
+  today: string,
+): StoreOffer[] {
+  const groups = new Map<string, PriceLean[]>();
+  for (const r of prices) {
+    const key = `${r.productId}:${r.storeId}`;
+    groups.set(key, [...(groups.get(key) ?? []), r]);
+  }
+  const byId = new Map(products.map((p) => [p.id, p]));
+  const out: StoreOffer[] = [];
+  for (const [key, records] of groups) {
+    const p = byId.get(String(records[0]!.productId));
+    const store = stores.get(String(records[0]!.storeId));
+    if (!p || !store) continue;
+    const eff = effectivePrice(records, today)!;
+    const row = toRow(eff.record, store, p.inTypeUnit, today);
+    out.push({
+      key,
+      productId: p.id,
+      productLabel: p.label,
+      packageLabel: p.packageLabel,
+      store,
+      price: row,
+      fellBack: eff.fellBack,
+      promoEnded: eff.promoEnded,
+      ageDays: eff.ageDays,
+      stale: eff.stale,
+      unitPriceMinor: row.unitPriceMinor,
+    });
+  }
+  return out;
+}
+
+const activeStores = (stores: Map<string, StoreRef>) =>
+  [...stores.values()].filter((s) => !s.archived).sort((a, b) => compareTr(a.label, b.label));
+
+/** /stok/urunler/:id — ürünün mağaza bazında fiyatları, geçmişi ve grafiği. */
+export async function getProductPrices(
+  userId: string,
+  householdId: string,
+  productId: string,
+): Promise<ProductPriceDetail | null> {
+  const m = await resolveMembership(userId, householdId, "viewer");
+  if (!m) return null;
+  const id = toObjectId(productId);
+  if (!id) return null;
+  const doc = await ProductModel.findOne({ _id: id, householdId: m.householdId })
+    .select({ productTypeId: 1 })
+    .lean<{ productTypeId: Types.ObjectId }>();
+  if (!doc) return null;
+  const list = await listProducts(userId, householdId, {
+    productTypeId: String(doc.productTypeId),
+    includeArchived: true,
+  });
+  const product = list?.products.find((p) => p.id === productId);
+  if (!product) return null;
+  const today = todayIstanbul();
+  const [stores, prices] = await Promise.all([
+    loadStores(m.householdId),
+    loadPrices(m.householdId, [id]),
+  ]);
+  const history = prices
+    .map((r) => toRow(r, stores.get(String(r.storeId))!, product.inTypeUnit, today))
+    .filter((r) => r.store)
+    .reverse();
+  const seriesIds = [...new Set(prices.map((r) => String(r.storeId)))];
+  const series = seriesIds
+    .map((sid) => stores.get(sid)!)
+    .filter(Boolean)
+    .sort((a, b) => a.slot - b.slot);
+  // Aynı gün aynı mağazada birden çok kayıt: son giriş geçerli.
+  const byDate = new Map<string, Record<string, number | string>>();
+  for (const r of prices) {
+    const point = byDate.get(r.date) ?? { date: r.date };
+    point[`s${String(r.storeId)}`] = r.priceMinor;
+    byDate.set(r.date, point);
+  }
+  // Son nokta bugün: her mağazanın geçerli fiyatı (çizgi bugüne uzar; biten kampanyada normal fiyat).
+  const offers = offersFor([product], prices, stores, today);
+  if (offers.length) {
+    const point = byDate.get(today) ?? { date: today };
+    for (const o of offers) point[`s${o.store.id}`] ??= o.price.priceMinor;
+    byDate.set(today, point);
+  }
+  return {
+    product,
+    offers: rankOffers(offers),
+    history,
+    series,
+    points: [...byDate.values()].sort((a, b) => (String(a.date) < String(b.date) ? -1 : 1)),
+    stores: activeStores(stores),
+    canWrite: hasHouseholdRole(m.role, "member"),
+    today,
+  };
+}
+
+/** Ürün tipi detayı: tüm marka/paket ve mağazalar birim fiyata göre. */
+export async function getTypePriceComparison(
+  userId: string,
+  householdId: string,
+  productTypeId: string,
+): Promise<TypePriceComparison | null> {
+  const m = await resolveMembership(userId, householdId, "viewer");
+  if (!m) return null;
+  const list = await listProducts(userId, householdId, { productTypeId });
+  if (!list) return null;
+  const type = await ProductTypeModel.findOne({
+    _id: new Types.ObjectId(productTypeId),
+    householdId: m.householdId,
+  })
+    .select({ unit: 1 })
+    .lean<{ unit: string }>();
+  if (!type) return null;
+  const today = todayIstanbul();
+  const [stores, prices] = await Promise.all([
+    loadStores(m.householdId),
+    loadPrices(
+      m.householdId,
+      list.products.map((p) => new Types.ObjectId(p.id)),
+    ),
+  ]);
+  return {
+    typeUnit: type.unit,
+    offers: rankOffers(
+      offersFor(list.products, prices, stores, today).filter((o) => !o.store.archived),
+    ),
+    products: list.products.map(priceProductOption),
+    stores: activeStores(stores),
+    canWrite: list.canWrite,
+  };
+}
+
+/**
+ * Ürün tipi başına son bilinen birim fiyat (en yeni geçerli fiyat kaydı; tüm marka/mağazalar).
+ * Tüketim analizinde aylık maliyet tahmini için. Dönüşümü eksik ürünler atlanır.
+ */
+export async function latestTypeUnitPrices(
+  householdId: Types.ObjectId,
+  productTypeIds: Types.ObjectId[],
+  today = todayIstanbul(),
+): Promise<Map<string, { unitPriceMinor: number; date: string }>> {
+  const [products, types] = await Promise.all([
+    ProductModel.find({ householdId, productTypeId: { $in: productTypeIds } })
+      .select({ productTypeId: 1, packageQuantity: 1, packageUnit: 1, typeQuantity: 1 })
+      .lean<
+        {
+          _id: Types.ObjectId;
+          productTypeId: Types.ObjectId;
+          packageQuantity: number;
+          packageUnit: string;
+          typeQuantity: number | null;
+        }[]
+      >(),
+    ProductTypeModel.find({ householdId, _id: { $in: productTypeIds } })
+      .select({ unit: 1 })
+      .lean<{ _id: Types.ObjectId; unit: string }[]>(),
+  ]);
+  const unitOf = new Map(types.map((x) => [String(x._id), x.unit]));
+  const prices = await loadPrices(
+    householdId,
+    products.map((p) => p._id),
+  );
+  const groups = new Map<string, PriceLean[]>();
+  for (const r of prices) {
+    const key = `${r.productId}:${r.storeId}`;
+    groups.set(key, [...(groups.get(key) ?? []), r]);
+  }
+  const productById = new Map(products.map((p) => [String(p._id), p]));
+  const out = new Map<string, { unitPriceMinor: number; date: string }>();
+  for (const records of groups.values()) {
+    const p = productById.get(String(records[0]!.productId))!;
+    const typeId = String(p.productTypeId);
+    const inType = packageInTypeUnit({
+      packageQuantity: p.packageQuantity,
+      packageUnit: p.packageUnit,
+      typeUnit: unitOf.get(typeId) ?? "",
+      typeQuantity: p.typeQuantity,
+    });
+    if (!inType) continue;
+    const eff = effectivePrice(records, today)!;
+    const prev = out.get(typeId);
+    if (!prev || eff.record.date > prev.date)
+      out.set(typeId, {
+        unitPriceMinor: unitPrice(eff.record.priceMinor, inType),
+        date: eff.record.date,
+      });
+  }
+  return out;
+}
+
+// --- Yazma ---
+
+async function activeRefs(m: Membership, input: Pick<ProductPriceForm, "productId" | "storeId">) {
+  const [product, store] = await Promise.all([
+    ProductModel.exists({
+      _id: new Types.ObjectId(input.productId),
+      householdId: m.householdId,
+      archivedAt: null,
+    }),
+    StoreModel.exists({
+      _id: new Types.ObjectId(input.storeId),
+      householdId: m.householdId,
+      archivedAt: null,
+    }),
+  ]);
+  if (!product) return fail(t.validation.product, { productId: t.validation.product });
+  if (!store) return fail(t.validation.store, { storeId: t.validation.store });
+  return null;
+}
+
+/** Fiyat kaydı ekler. Gelecek tarihli fiyat girilemez. */
+export async function addProductPrice(
+  actorId: string,
+  householdId: string,
+  input: ProductPriceForm,
+  source: PriceSource = "manual",
+): Promise<ActionResult<{ id: string }>> {
+  const m = await resolveMembership(actorId, householdId, "member");
+  if (!m) return fail(tr.common.unauthorized);
+  if (input.date > todayIstanbul())
+    return fail(t.validation.futureDate, { date: t.validation.futureDate });
+  const bad = await activeRefs(m, input);
+  if (bad) return bad;
+  const doc = await ProductPriceModel.create({
+    householdId: m.householdId,
+    productId: new Types.ObjectId(input.productId),
+    storeId: new Types.ObjectId(input.storeId),
+    date: input.date,
+    priceMinor: input.priceMinor,
+    isPromo: input.isPromo,
+    promoUntil: input.promoUntil,
+    source,
+    note: input.note,
+    createdBy: new Types.ObjectId(actorId),
+  });
+  return ok({ id: String(doc._id) });
+}
+
+export async function deleteProductPrice(
+  actorId: string,
+  householdId: string,
+  priceId: string,
+): Promise<ActionResult> {
+  const m = await resolveMembership(actorId, householdId, "member");
+  if (!m) return fail(tr.common.unauthorized);
+  const id = toObjectId(priceId);
+  const row = id
+    ? await ProductPriceModel.findOne({
+        _id: id,
+        householdId: m.householdId,
+        deletedAt: null,
+      }).lean<PriceLean>()
+    : null;
+  if (!row) return fail(tr.common.notFound);
+  const actor = new Types.ObjectId(actorId);
+  await ProductPriceModel.updateOne({ _id: row._id }, { $set: { deletedAt: new Date() } });
+  await writeAudit({
+    action: "price.delete",
+    actorId: actor,
+    householdId: m.householdId,
+    targetType: "productPrice",
+    targetId: priceId,
+    diff: {
+      productId: String(row.productId),
+      storeId: String(row.storeId),
+      date: row.date,
+      priceMinor: row.priceMinor,
+    },
+  });
+  return ok(undefined);
+}
+
+export type { PriceProductOption };

src/features/stock/service.ts

@@ -12,6 +12,7 @@ import {
 } from "@/features/categories/tree";
 import { hasHouseholdRole } from "@/features/households/roles";
 import { resolveMembership, type Membership } from "@/features/households/service";
+import { latestTypeUnitPrices } from "@/features/prices/service";
 import { tr } from "@/i18n/tr";
 import { fail, ok, type ActionResult } from "@/lib/action-result";
 import { writeAudit } from "@/lib/audit";
@@ -24,6 +25,7 @@ import { StockCountModel } from "@/models/stock-count";
 import { StockMovementModel } from "@/models/stock-movement";
 import { todayIstanbul } from "@/shared/dates";
 import { shiftMonth } from "@/shared/budget";
+import { QUANTITY_SCALE } from "@/shared/quantity";
 import type {
   ProductTypeForm,
   StockCategoryForm,
@@ -1242,6 +1244,10 @@ export type StockAnalysisRow = {
   avgMonthlyWasted: number | null;
   /** Fire / (kullanım + fire), %. */
   wastePct: number | null;
+  /** Son bilinen birim fiyat (ürün tipi biriminde, kesirli kuruş) ve tarihi. */
+  unitPrice: { minor: number; date: string } | null;
+  /** Aylık ortalama maliyet tahmini: ortalama tüketim × son birim fiyat (kuruş). */
+  avgMonthlyCostMinor: number | null;
   /** Bu ay (bugüne kadar). */
   thisMonth: MonthUsage;
 };
@@ -1264,10 +1270,11 @@ export async function getStockAnalysis(
     shiftMonth(thisMonth, i - ANALYSIS_MONTHS),
   );
   const m = (await resolveMembership(userId, householdId, "viewer"))!;
-  const moves = await loadMoves(
-    m.householdId,
-    data.items.map((i) => new Types.ObjectId(i.id)),
-  );
+  const ids = data.items.map((i) => new Types.ObjectId(i.id));
+  const [moves, prices] = await Promise.all([
+    loadMoves(m.householdId, ids),
+    latestTypeUnitPrices(m.householdId, ids, data.today),
+  ]);
   const rows = data.items.map((item): StockAnalysisRow => {
     const list = moves.get(item.id) ?? [];
     const [usage, current] = [monthlyUsage(list, months), monthlyUsage(list, [thisMonth])[0]!];
@@ -1277,6 +1284,8 @@ export async function getStockAnalysis(
     const sum = (k: "used" | "wasted") => full.reduce((s, u) => s + u[k], 0);
     const used = sum("used");
     const wasted = sum("wasted");
+    const price = prices.get(item.id) ?? null;
+    const avgUsed = full.length ? used / full.length : null;
     return {
       id: item.id,
       name: item.name,
@@ -1287,6 +1296,11 @@ export async function getStockAnalysis(
       avgMonthlyUsed: full.length ? roundForDisplay(used / full.length) : null,
       avgMonthlyWasted: full.length ? roundForDisplay(wasted / full.length) : null,
       wastePct: used + wasted > 0 ? Math.round((wasted * 100) / (used + wasted)) : null,
+      unitPrice: price ? { minor: price.unitPriceMinor, date: price.date } : null,
+      avgMonthlyCostMinor:
+        price && avgUsed !== null
+          ? Math.round((avgUsed * price.unitPriceMinor) / QUANTITY_SCALE)
+          : null,
       thisMonth: current,
     };
   });