/** Abo-Abschluss: nur mit verifiziertem Konto, nur fuer verfuegbare Abo-Angebote, mit gepruefter Personalisierung. */
import { beforeEach, describe, expect, test, vi } from "vitest";

const m = vi.hoisted(() => ({
  getCurrentCustomer: vi.fn(),
  getOfferBySlug: vi.fn(),
  createSubscriptionCheckout: vi.fn(),
  preparePendingCheckout: vi.fn(),
  isTrustedOrigin: vi.fn(),
}));

vi.mock("@/lib/auth", () => ({ getCurrentCustomer: m.getCurrentCustomer }));
vi.mock("@/lib/csrf", () => ({ isTrustedOrigin: m.isTrustedOrigin }));
vi.mock("@/lib/rate-limit", () => ({ rateLimit: () => true, getClientIp: async () => "127.0.0.1" }));
vi.mock("@/i18n/locale", () => ({ getLocale: async () => "de" }));
vi.mock("@/lib/sponsorship/offers", () => ({ getOfferBySlug: m.getOfferBySlug }));
vi.mock("@/lib/sponsorship-subscription/checkout", () => ({ createSubscriptionCheckout: m.createSubscriptionCheckout }));
vi.mock("@/lib/sponsorship-subscription/pending", () => ({ preparePendingCheckout: m.preparePendingCheckout }));
vi.mock("@/lib/certificate/layout", () => ({ checkCertificateFits: () => ({ ok: true }) }));

const { POST } = await import("./route");

const CUSTOMER = { id: "cust_1", email: "erika@example.org", emailVerifiedAt: new Date(), stripeCustomerId: null, sepaBlockedAt: null };
const PERSONALIZATION = { beeName: "Summsi", recipientName: "Erika Mustermann", occasion: "SELBST", startDate: "2030-01-01" };

function post(body: unknown): Promise<Response> {
  return POST(
    new Request("https://wabenhain.test/api/patenschaft/abo", {
      method: "POST",
      headers: { "Content-Type": "application/json", Origin: "https://wabenhain.test" },
      body: JSON.stringify(body),
    })
  );
}

beforeEach(() => {
  vi.clearAllMocks();
  vi.spyOn(console, "error").mockImplementation(() => {});
  m.isTrustedOrigin.mockReturnValue(true);
  m.getCurrentCustomer.mockResolvedValue(CUSTOMER);
  m.getOfferBySlug.mockResolvedValue({ id: "offer_1", slug: "vierteljaehrlich", kind: "ABO", isAvailable: true });
  m.createSubscriptionCheckout.mockResolvedValue({ clientSecret: "cs_secret", subscriptionId: "sub_local" });
  m.preparePendingCheckout.mockResolvedValue({ ok: true });
});

describe("POST /api/patenschaft/abo", () => {
  test("liefert das client_secret und ersetzt das Startdatum durch heute", async () => {
    const response = await post({ offerSlug: "vierteljaehrlich", personalization: PERSONALIZATION });

    expect(response.status).toBe(200);
    expect(await response.json()).toEqual({ clientSecret: "cs_secret" });
    const input = m.createSubscriptionCheckout.mock.calls[0][0];
    expect(input.personalization.startDate).toBe(new Date().toISOString().slice(0, 10));
    expect(input.offerId).toBe("offer_1");
  });

  test("weist fremde Herkunft ab", async () => {
    m.isTrustedOrigin.mockReturnValue(false);
    expect((await post({ offerSlug: "x", personalization: PERSONALIZATION })).status).toBe(403);
  });

  test("ohne Konto 401, ohne bestaetigte Adresse 403", async () => {
    m.getCurrentCustomer.mockResolvedValueOnce(null);
    expect((await post({ offerSlug: "vierteljaehrlich", personalization: PERSONALIZATION })).status).toBe(401);
    m.getCurrentCustomer.mockResolvedValueOnce({ ...CUSTOMER, emailVerifiedAt: null });
    expect((await post({ offerSlug: "vierteljaehrlich", personalization: PERSONALIZATION })).status).toBe(403);
    expect(m.createSubscriptionCheckout).not.toHaveBeenCalled();
  });

  test("ungueltige Personalisierung wird abgelehnt", async () => {
    const response = await post({ offerSlug: "vierteljaehrlich", personalization: { ...PERSONALIZATION, beeName: "" } });
    expect(response.status).toBe(400);
    expect((await response.json()).field).toBe("beeName");
  });

  test("Einmal-Angebote laufen nicht ueber den Abo-Weg", async () => {
    m.getOfferBySlug.mockResolvedValue({ id: "offer_2", slug: "bienenfreund", kind: "EINMALIG", isAvailable: true });
    expect((await post({ offerSlug: "bienenfreund", personalization: PERSONALIZATION })).status).toBe(404);
  });

  test("ausgebuchtes Abo (Kontingent oder Honig) nimmt keine Abschluesse an", async () => {
    m.getOfferBySlug.mockResolvedValue({ id: "offer_1", slug: "vierteljaehrlich", kind: "ABO", isAvailable: false });
    expect((await post({ offerSlug: "vierteljaehrlich", personalization: PERSONALIZATION })).status).toBe(409);
    expect(m.createSubscriptionCheckout).not.toHaveBeenCalled();
  });

  test("ein Stripe-Fehler wird ohne Details gemeldet", async () => {
    m.createSubscriptionCheckout.mockRejectedValue(new Error("Invalid API Key provided: sk_test_***"));
    const response = await post({ offerSlug: "vierteljaehrlich", personalization: PERSONALIZATION });
    expect(response.status).toBe(502);
    expect(JSON.stringify(await response.json())).not.toContain("sk_test");
  });

  test("bereitet den Abschluss vor (alter offener Abschluss desselben Angebots wird ersetzt)", async () => {
    await post({ offerSlug: "vierteljaehrlich", personalization: PERSONALIZATION });

    expect(m.preparePendingCheckout).toHaveBeenCalledWith({ customerId: "cust_1", offerId: "offer_1" });
    expect(m.preparePendingCheckout.mock.invocationCallOrder[0]).toBeLessThan(m.createSubscriptionCheckout.mock.invocationCallOrder[0]);
  });

  test("mehr als drei offene Abschluesse je Konto: klare Ablehnung, kein neuer Checkout", async () => {
    m.preparePendingCheckout.mockResolvedValue({ ok: false, reason: "too_many_pending" });

    const response = await post({ offerSlug: "vierteljaehrlich", personalization: PERSONALIZATION });

    expect(response.status).toBe(409);
    expect(await response.json()).toMatchObject({ code: "too_many_pending", error: expect.stringContaining("offene Abo-Abschlüsse") });
    expect(m.createSubscriptionCheckout).not.toHaveBeenCalled();
  });
});