// @vitest-environment node
import { describe, expect, it, vi } from "vitest";

// Die reinen Funktionen ziehen ueber ihre Module lib/prisma.ts nach — fuer
// diese Tests reicht ein leerer Ersatz, eine Datenbank wird nie gefragt.
vi.mock("@/lib/prisma", () => ({ prisma: {} }));

import { formatSponsorshipNumber } from "@/lib/sponsorship/number";
import { certificateRelativePath } from "@/lib/sponsorship/storage";
import { retryDelayMs, MAX_ISSUE_ATTEMPTS } from "@/lib/sponsorship/issue";
import { isOfferAvailable, type SponsorshipOfferView } from "@/lib/sponsorship/offers";
import { expandCheckoutItems, startDateWindow, type CheckoutProduct } from "@/lib/sponsorship/checkout-expand";

describe("Patenschaftsnummer", () => {
  it("ist fuenfstellig fortlaufend je Jahr", () => {
    expect(formatSponsorshipNumber(2026, 42)).toBe("WH-P-2026-00042");
    expect(formatSponsorshipNumber(2027, 12345)).toBe("WH-P-2027-12345");
  });
});

describe("Ablagepfad der Urkunde", () => {
  it("enthaelt nur Jahr, Nummer und Revision — keine Namen", () => {
    expect(certificateRelativePath({ number: "WH-P-2026-00042", revision: 3, year: 2026 })).toBe(
      "2026/WH-P-2026-00042/r3.pdf"
    );
  });

  it("weist manipulierte Nummern ab", () => {
    expect(() => certificateRelativePath({ number: "../../etc", revision: 1, year: 2026 })).toThrow();
  });
});

describe("Wiederholung der Ausstellung", () => {
  it("verdoppelt den Abstand und deckelt bei 12 Stunden", () => {
    expect(retryDelayMs(1)).toBe(5 * 60 * 1000);
    expect(retryDelayMs(2)).toBe(10 * 60 * 1000);
    expect(retryDelayMs(MAX_ISSUE_ATTEMPTS + 10)).toBe(12 * 60 * 60 * 1000);
  });
});

describe("Bestellbarkeit eines Angebots", () => {
  const base = {
    isActive: true,
    kind: "EINMALIG" as const,
    hasCarrierProduct: true,
    honeyJars: 3,
    honeyProductActive: true,
    freeJars: 3,
    maxActiveSubscriptions: null,
    activeSubscriptions: 0,
  };

  it("braucht genug FREIEN Honig fuer ein Paket", () => {
    expect(isOfferAvailable(base)).toBe(true);
    expect(isOfferAvailable({ ...base, freeJars: 2 })).toBe(false);
  });

  it("ist ohne Honigprodukt oder ohne Traegerprodukt nicht bestellbar", () => {
    expect(isOfferAvailable({ ...base, honeyProductActive: null })).toBe(false);
    expect(isOfferAvailable({ ...base, hasCarrierProduct: false })).toBe(false);
  });

  it("stoppt Abos, wenn das Kontingent voll ist", () => {
    const abo = { ...base, kind: "ABO" as const, hasCarrierProduct: false, maxActiveSubscriptions: 5 };
    expect(isOfferAvailable({ ...abo, activeSubscriptions: 4 })).toBe(true);
    expect(isOfferAvailable({ ...abo, activeSubscriptions: 5 })).toBe(false);
  });
});

describe("Aufloesen von Patenschaftspaketen im Checkout", () => {
  const now = new Date("2026-11-02T10:00:00Z");
  const honey: CheckoutProduct = {
    id: "honey",
    name: "Waldhonig 500 g",
    batchId: "batch-1",
    priceCents: 990,
    weightGrams: 500,
    category: "HONIG",
    isActive: true,
  };
  const carrier: CheckoutProduct = {
    id: "carrier",
    name: "Bienenpatenschaft Wabenfreund",
    batchId: null,
    priceCents: 3800,
    weightGrams: 0,
    category: "PATENSCHAFT",
    isActive: true,
  };
  const offer: SponsorshipOfferView = {
    id: "offer",
    slug: "wabenfreund",
    kind: "EINMALIG",
    name: "Wabenfreund",
    description: "",
    features: [],
    priceCents: 5900,
    isPhysical: true,
    honeyJars: 3,
    honeyShareCentsPerJar: 700,
    honeyShareCentsPerMonth: 0,
    cycle: null,
    medalTier: "GOLD",
    productId: "carrier",
    honeyProduct: { id: "honey", name: "Waldhonig 500 g", weightGrams: 500 },
    isAvailable: true,
  };
  const personalization = {
    beeName: "Summsi",
    recipientName: "Marie-Luise Schmidt",
    giverNames: "Anna und Ben",
    dedication: "Für die schönste Zeit.",
    occasion: "GEBURTSTAG",
    startDate: "2026-11-02",
  };
  const input = (cartItems: { productId: string; quantity: number; personalization?: unknown }[]) => ({
    cartItems,
    products: new Map([
      ["honey", honey],
      ["carrier", carrier],
    ]),
    offers: new Map([["carrier", offer]]),
    vatRateFor: (product: CheckoutProduct) => (product.category === "HONIG" ? 7 : 19),
    locale: "de" as const,
    now,
  });

  it("teilt den Paketpreis in Patenschaft (19 %) und Honig (7 %) auf", () => {
    const result = expandCheckoutItems(input([{ productId: "carrier", quantity: 1, personalization }]));
    expect(result.ok).toBe(true);
    if (!result.ok) return;
    const [main, honeyLine] = result.items;
    expect(main).toMatchObject({ productId: "carrier", totalCents: 3800, vatRatePercent: 19, sponsorshipRole: "MAIN" });
    expect(honeyLine).toMatchObject({ productId: "honey", quantity: 3, unitPriceCents: 700, totalCents: 2100, vatRatePercent: 7, sponsorshipRole: "HONEY" });
    expect(main.totalCents + honeyLine.totalCents).toBe(5900);
    // Nur der Honig wird reserviert, die Urkunde hat keinen Bestand.
    expect(result.reserve).toEqual([{ productId: "honey", quantity: 3, productName: "Waldhonig 500 g" }]);
    expect(result.physicalQuantity).toBe(3);
  });

  it("haelt zwei gleiche Pakete auseinander und fasst ihre Reservierung zusammen", () => {
    const result = expandCheckoutItems(
      input([
        { productId: "carrier", quantity: 1, personalization },
        { productId: "carrier", quantity: 1, personalization: { ...personalization, beeName: "Brummi" } },
      ])
    );
    expect(result.ok).toBe(true);
    if (!result.ok) return;
    expect(result.items.filter((item) => item.sponsorshipRole === "MAIN")).toHaveLength(2);
    expect(result.reserve).toEqual([{ productId: "honey", quantity: 6, productName: "Waldhonig 500 g" }]);
  });

  it("weist Menge > 1, fehlende oder manipulierte Personalisierung ab", () => {
    expect(expandCheckoutItems(input([{ productId: "carrier", quantity: 2, personalization }])).ok).toBe(false);
    expect(expandCheckoutItems(input([{ productId: "carrier", quantity: 1 }])).ok).toBe(false);
    expect(
      expandCheckoutItems(
        input([{ productId: "carrier", quantity: 1, personalization: { ...personalization, dedication: "x".repeat(2000) } }])
      ).ok
    ).toBe(false);
  });

  it("verlangt ein Startdatum zwischen heute und in sechs Monaten", () => {
    const window = startDateWindow(now);
    expect(window).toEqual({ min: "2026-11-02", max: "2027-05-02" });
    expect(
      expandCheckoutItems(input([{ productId: "carrier", quantity: 1, personalization: { ...personalization, startDate: "2026-11-01" } }])).ok
    ).toBe(false);
  });

  it("verkauft kein Paket, dessen Angebot nicht bestellbar ist", () => {
    const result = expandCheckoutItems({
      ...input([{ productId: "carrier", quantity: 1, personalization }]),
      offers: new Map([["carrier", { ...offer, isAvailable: false }]]),
    });
    expect(result.ok).toBe(false);
  });

  it("erkennt eine rein digitale Bestellung", () => {
    const digitalOffer = { ...offer, isPhysical: false, honeyJars: 0, honeyShareCentsPerJar: 0, priceCents: 1900, honeyProduct: null };
    const result = expandCheckoutItems({
      ...input([{ productId: "carrier", quantity: 1, personalization }]),
      offers: new Map([["carrier", digitalOffer]]),
    });
    expect(result.ok && result.hasPhysical).toBe(false);
    expect(result.ok && result.items).toHaveLength(1);
  });
});