/**
 * Lieferauftraege im Abo: nur aus bezahlten Monaten, nie doppelt, und ohne
 * Adresse oder Bestand zurueckgestellt statt still verloren.
 */
import { beforeEach, describe, expect, test, vi } from "vitest";

const m = vi.hoisted(() => ({
  db: {
    subscriptionDelivery: { findMany: vi.fn(), findUniqueOrThrow: vi.fn(), create: vi.fn(), updateMany: vi.fn() },
    sponsorshipSubscription: { findMany: vi.fn() },
    subscriptionPayment: { updateMany: vi.fn() },
    inventory: { updateMany: vi.fn() },
    order: { create: vi.fn() },
    customer: { findUniqueOrThrow: vi.fn() },
    $transaction: vi.fn(),
  },
  sendMail: vi.fn(),
  recordOrderSale: vi.fn(),
  scheduleApiCoreStockSync: vi.fn(),
}));

vi.mock("@/lib/prisma", () => ({ prisma: m.db }));
vi.mock("@/lib/mail", () => ({ sendMail: m.sendMail }));
vi.mock("@/lib/url", () => ({ getBaseUrl: () => "https://wabenhain.test" }));
vi.mock("@/lib/apicore-stock/stock-events", () => ({ recordOrderSale: m.recordOrderSale }));
vi.mock("@/lib/apicore-stock/schedule", () => ({ scheduleApiCoreStockSync: m.scheduleApiCoreStockSync }));
vi.mock("@/lib/sponsorship-subscription/emails", () => ({
  subscriptionDeliveryEmail: vi.fn(async () => ({ subject: "Lieferung", html: "<p></p>", text: "" })),
}));

const { createDueDeliveries, NOTE_NO_ADDRESS, NOTE_NO_STOCK } = await import("./deliveries");

const NOW = new Date("2026-10-16T12:00:00.000Z");
const DAY = 24 * 60 * 60 * 1000;
const paid = (id: string, daysAgo: number) => {
  const paidAt = new Date(NOW.getTime() - daysAgo * DAY);
  return { id, paidAt, countsFrom: paidAt, reversedAt: null, deliveryId: null };
};

const ADDRESS = {
  firstName: "Erika",
  lastName: "Mustermann",
  street: "Wiesenweg 1",
  zip: "86450",
  city: "Altenmünster",
  country: "DE",
  packstationNumber: null,
  postNumber: null,
};

function eligibleSubscription(payments = [paid("p1", 70), paid("p2", 40), paid("p3", 10)]) {
  return {
    id: "sub_local",
    status: "AKTIV",
    offer: { cycle: "VIERTELJAEHRLICH", honeyJars: 2, harvestWindows: [] },
    payments,
  };
}

const delivery = {
  id: "del_1",
  jars: 2,
  orderId: null,
  subscription: {
    id: "sub_local",
    status: "AKTIV",
    locale: "de",
    customerId: "cust_1",
    offerId: "offer_1",
    offer: {
      name: "Vierteljährlich",
      honeyProduct: { id: "honey_1", name: "Frühtracht 500 g", batchId: "batch_1", weightGrams: 500, category: "HONIG", vatRatePercent: null },
    },
  },
};

beforeEach(() => {
  vi.clearAllMocks();
  vi.spyOn(console, "info").mockImplementation(() => {});
  m.db.$transaction.mockImplementation(async (fn: (tx: typeof m.db) => unknown) => fn(m.db));
  m.db.subscriptionDelivery.findMany.mockResolvedValue([]);
  m.db.sponsorshipSubscription.findMany.mockResolvedValue([eligibleSubscription()]);
  m.db.subscriptionDelivery.create.mockResolvedValue({ id: "del_1" });
  m.db.subscriptionPayment.updateMany.mockResolvedValue({ count: 3 });
  m.db.subscriptionDelivery.findUniqueOrThrow.mockResolvedValue(delivery);
  m.db.subscriptionDelivery.updateMany.mockResolvedValue({ count: 1 });
  m.db.customer.findUniqueOrThrow.mockResolvedValue({
    email: "erika@example.org",
    firstName: "Erika",
    lastName: "Mustermann",
    phone: null,
    addresses: [ADDRESS],
  });
  m.db.inventory.updateMany.mockResolvedValue({ count: 1 });
  m.db.order.create.mockResolvedValue({ id: "order_9", orderNumber: "WH-2026-00000009" });
  m.sendMail.mockResolvedValue(true);
});

describe("createDueDeliveries", () => {
  test("legt nach drei bezahlten Monaten eine 0-€-Versandbestellung an und verbraucht die Zahlungen", async () => {
    const result = await createDueDeliveries(NOW);

    expect(result).toEqual({ created: 1, deferred: 0 });
    expect(m.db.subscriptionPayment.updateMany).toHaveBeenCalledWith({
      where: { id: { in: ["p1", "p2", "p3"] }, deliveryId: null, reversedAt: null },
      data: { deliveryId: "del_1" },
    });
    expect(m.db.inventory.updateMany).toHaveBeenCalledWith({
      where: { productId: "honey_1", quantity: { gte: 2 } },
      data: { quantity: { decrement: 2 } },
    });
    const order = m.db.order.create.mock.calls[0][0].data;
    expect(order).toMatchObject({ status: "BEZAHLT", fulfillmentMethod: "VERSAND", totalCents: 0, street: "Wiesenweg 1" });
    expect(order.items.create).toMatchObject({ productId: "honey_1", quantity: 2, unitPriceCents: 0, totalCents: 0 });
    // Bezahlt-Nachweis fuer den DHL-Ablauf (admin/actions/dhl.ts verlangt eine erfolgreiche Zahlung).
    expect(order.payment.create).toMatchObject({ provider: "abo", status: "SUCCEEDED", amountCents: 0, paidAt: expect.any(Date) });
    expect(m.db.subscriptionDelivery.updateMany).toHaveBeenCalledWith({
      where: { id: "del_1", orderId: null },
      data: { orderId: "order_9", status: "ANGELEGT", note: null },
    });
    expect(m.recordOrderSale).toHaveBeenCalledWith(m.db, "order_9");
    expect(m.scheduleApiCoreStockSync).toHaveBeenCalledWith(["honey_1"]);
    expect(m.sendMail).toHaveBeenCalledOnce();
  });

  test("zwei bezahlte Monate: keine Lieferung", async () => {
    m.db.sponsorshipSubscription.findMany.mockResolvedValue([eligibleSubscription([paid("p1", 40), paid("p2", 10)])]);

    const result = await createDueDeliveries(NOW);

    expect(result).toEqual({ created: 0, deferred: 0 });
    expect(m.db.subscriptionDelivery.create).not.toHaveBeenCalled();
  });

  test("ein gleichzeitiger zweiter Lauf, der die Zahlungen nicht mehr bekommt, legt nichts an", async () => {
    m.db.subscriptionPayment.updateMany.mockResolvedValue({ count: 2 });

    const result = await createDueDeliveries(NOW);

    expect(result).toEqual({ created: 0, deferred: 0 });
    expect(m.db.order.create).not.toHaveBeenCalled();
    expect(m.sendMail).not.toHaveBeenCalled();
  });

  test("ohne Standardadresse wird die Lieferung mit Hinweis zurueckgestellt", async () => {
    m.db.customer.findUniqueOrThrow.mockResolvedValue({
      email: "erika@example.org",
      firstName: "Erika",
      lastName: "Mustermann",
      phone: null,
      addresses: [],
    });

    const result = await createDueDeliveries(NOW);

    expect(result).toEqual({ created: 0, deferred: 1 });
    expect(m.db.order.create).not.toHaveBeenCalled();
    expect(m.db.subscriptionDelivery.updateMany).toHaveBeenCalledWith({
      where: { id: "del_1", orderId: null },
      data: { status: "ZURUECKGESTELLT", note: NOTE_NO_ADDRESS },
    });
  });

  test("ohne ausreichenden Bestand wird die Lieferung zurueckgestellt, nichts wird abgebucht", async () => {
    m.db.inventory.updateMany.mockResolvedValue({ count: 0 });

    const result = await createDueDeliveries(NOW);

    expect(result).toEqual({ created: 0, deferred: 1 });
    expect(m.db.order.create).not.toHaveBeenCalled();
    expect(m.db.subscriptionDelivery.updateMany).toHaveBeenCalledWith({
      where: { id: "del_1", orderId: null },
      data: { status: "ZURUECKGESTELLT", note: NOTE_NO_STOCK },
    });
  });

  test("zurueckgestellte Lieferungen werden erneut versucht, sobald die Adresse da ist", async () => {
    m.db.subscriptionDelivery.findMany.mockResolvedValue([{ id: "del_1" }]);
    m.db.sponsorshipSubscription.findMany.mockResolvedValue([]);

    const result = await createDueDeliveries(NOW);

    expect(result).toEqual({ created: 1, deferred: 0 });
    expect(m.db.subscriptionDelivery.create).not.toHaveBeenCalled();
  });

  test("eine bereits angelegte Lieferung wird nicht ein zweites Mal bestellt", async () => {
    m.db.subscriptionDelivery.findMany.mockResolvedValue([{ id: "del_1" }]);
    m.db.sponsorshipSubscription.findMany.mockResolvedValue([]);
    m.db.subscriptionDelivery.findUniqueOrThrow.mockResolvedValue({ ...delivery, orderId: "order_9" });

    const result = await createDueDeliveries(NOW);

    expect(result).toEqual({ created: 0, deferred: 0 });
    expect(m.db.order.create).not.toHaveBeenCalled();
  });

  test("im Verzug ruht eine faellige Lieferung", async () => {
    m.db.subscriptionDelivery.findMany.mockResolvedValue([{ id: "del_1" }]);
    m.db.sponsorshipSubscription.findMany.mockResolvedValue([]);
    m.db.subscriptionDelivery.findUniqueOrThrow.mockResolvedValue({
      ...delivery,
      subscription: { ...delivery.subscription, status: "IM_VERZUG" },
    });

    await createDueDeliveries(NOW);

    expect(m.db.order.create).not.toHaveBeenCalled();
  });
});