import { afterEach, beforeEach, describe, expect, test, vi } from "vitest";
import { fetchTenantBySlug, type Tenant } from "./tenant-registry";

const SAMPLE: Tenant = {
  id: "00000000-0000-0000-0000-000000000001",
  slug: "acme",
  name: "Acme Inc.",
  status: "active",
  plan: "professional",
  products: ["certifai", "compliance"],
  created_at: "2026-05-18T22:00:00Z",
};

const originalFetch = globalThis.fetch;
const originalRegistryUrl = process.env.TENANT_REGISTRY_URL;

afterEach(() => {
  globalThis.fetch = originalFetch;
  process.env.TENANT_REGISTRY_URL = originalRegistryUrl;
  vi.restoreAllMocks();
});

describe("fetchTenantBySlug", () => {
  beforeEach(() => {
    process.env.TENANT_REGISTRY_URL = "http://test:1234";
  });

  test("200 → parsed tenant", async () => {
    globalThis.fetch = vi.fn(async () => new Response(JSON.stringify(SAMPLE), { status: 200 }));
    const t = await fetchTenantBySlug("acme");
    expect(t).toEqual(SAMPLE);
  });

  test("404 → null", async () => {
    globalThis.fetch = vi.fn(async () => new Response("", { status: 404 }));
    const t = await fetchTenantBySlug("nope");
    expect(t).toBeNull();
  });

  test("500 → throws", async () => {
    globalThis.fetch = vi.fn(async () => new Response("", { status: 500, statusText: "boom" }));
    await expect(fetchTenantBySlug("acme")).rejects.toThrow(/tenant-registry: 500/);
  });

  test("falls back to default base URL when env unset", async () => {
    delete process.env.TENANT_REGISTRY_URL;
    const fetchSpy = vi.fn(async () => new Response(JSON.stringify(SAMPLE), { status: 200 }));
    globalThis.fetch = fetchSpy;
    await fetchTenantBySlug("acme");
    expect(fetchSpy).toHaveBeenCalledWith(
      "http://localhost:8080/v1/tenants/by-slug/acme",
      expect.any(Object),
    );
  });

  test("encodes slug to defend against weird input", async () => {
    const fetchSpy = vi.fn<typeof fetch>(async () => new Response("", { status: 404 }));
    globalThis.fetch = fetchSpy;
    await fetchTenantBySlug("a/b c");
    const firstCall = fetchSpy.mock.calls[0];
    expect(firstCall).toBeDefined();
    expect(firstCall![0]).toBe("http://test:1234/v1/tenants/by-slug/a%2Fb%20c");
  });
});