import { expect, test, vi } from "vitest";
import { createAuthentikGroupCatalog } from "../src/auth/authentik-group-catalog.js";

const apiToken = "authentik-api-token-UNIQUE-9Q7";
const clientSecret = "oidc-client-secret-UNIQUE-7P3";
const passwordHash = "$argon2id$v=19$password-hash-UNIQUE-2T8";
const cookie = "cookie-UNIQUE-5M1";
const filePath = "/private/path-UNIQUE-4K6";

function catalog(fetch: typeof globalThis.fetch) {
  return createAuthentikGroupCatalog({
    baseUrl: "https://authentik.example.test",
    apiToken,
    fetch,
  });
}

function groups(...names: string[]): Response {
  return Response.json({ pagination: { next: null }, results: names.map((name) => ({ name })) });
}

test("looks up only each configured group by its exact encoded name", async () => {
  const fetch = vi.fn<typeof globalThis.fetch>(async () => groups("TOT Users"));
  const result = await catalog(fetch).verifyConfiguredGroups(["TOT Users"], new AbortController().signal);

  expect(result).toEqual([]);
  expect(fetch).toHaveBeenCalledOnce();
  const [input, init] = fetch.mock.calls[0]!;
  expect(String(input)).toBe("https://authentik.example.test/api/v3/core/groups/?name=TOT+Users&include_users=false&page_size=2");
  expect(init).toMatchObject({ redirect: "error" });
  expect(new Headers(init?.headers).get("authorization")).toBe(`Bearer ${apiToken}`);
  expect(init?.signal).toBeInstanceOf(AbortSignal);
});

test.each([
  ["missing", groups(), "oidc_mapped_group_missing"],
  ["duplicate exact results", groups("TOT Users", "TOT Users"), "oidc_mapped_group_ambiguous"],
  ["non-exact result", groups("tot users"), "oidc_mapped_group_missing"],
])("reports configured group %s without exposing an upstream body", async (_caseName, response, code) => {
  const result = await catalog(vi.fn<typeof globalThis.fetch>(async () => response))
    .verifyConfiguredGroups(["TOT Users"], new AbortController().signal);

  expect(result).toEqual([expect.objectContaining({ level: "error", code, field: "TOT Users" })]);
});

test("treats a pagination continuation as an ambiguous configured group", async () => {
  const response = Response.json({ pagination: { next: "https://authentik.example.test/api/v3/core/groups/?page=2" }, results: [{ name: "TOT Users" }] });
  const result = await catalog(vi.fn<typeof globalThis.fetch>(async () => response))
    .verifyConfiguredGroups(["TOT Users"], new AbortController().signal);

  expect(result).toEqual([expect.objectContaining({ code: "oidc_mapped_group_ambiguous", field: "TOT Users" })]);
});

test.each([
  ["unauthorized", new Response("upstream body must not escape", { status: 401 }), "oidc_group_catalog_unauthorized"],
  ["forbidden", new Response("upstream body must not escape", { status: 403 }), "oidc_group_catalog_unauthorized"],
  ["redirect", new Response(null, { status: 302, headers: { location: "https://elsewhere.invalid" } }), "oidc_group_catalog_unreachable"],
  ["invalid json", new Response("not-json"), "oidc_group_catalog_unreachable"],
])("returns a stable diagnostic for %s without parsing or leaking response data", async (_caseName, response, code) => {
  const result = await catalog(vi.fn<typeof globalThis.fetch>(async () => response))
    .verifyConfiguredGroups(["TOT Users"], new AbortController().signal);

  expect(result).toEqual([expect.objectContaining({ level: "error", code })]);
  expect(JSON.stringify(result)).not.toContain("upstream body must not escape");
});

test("refuses declared and streamed group catalog bodies larger than one MiB", async () => {
  const declared = new Response(new ReadableStream({ pull() { throw new Error("must not read"); } }), {
    headers: { "content-length": String(1024 * 1024 + 1) },
  });
  const streamed = new Response(new ReadableStream({
    type: "bytes",
    pull(controller) {
      controller.enqueue(new Uint8Array(1024 * 1024));
      controller.enqueue(new Uint8Array(1));
      controller.close();
    },
  }));

  for (const response of [declared, streamed]) {
    const result = await catalog(vi.fn<typeof globalThis.fetch>(async () => response))
      .verifyConfiguredGroups(["TOT Users"], new AbortController().signal);
    expect(result).toEqual([expect.objectContaining({ code: "oidc_group_catalog_unreachable" })]);
  }
});

test.each([
  ["malformed", "not-a-number"],
  ["oversized", String(1024 * 1024 + 1)],
])("cancels a %s declared-size body without waiting for hanging cancellation", async (_caseName, contentLength) => {
  let cancelled = false;
  const body = new ReadableStream({
    pull() { /* early declared-size rejection must not read */ },
    cancel() {
      cancelled = true;
      return new Promise<void>(() => { /* cancellation remains advisory */ });
    },
  });
  const completion = catalog(vi.fn<typeof globalThis.fetch>(async () => new Response(body, {
    headers: { "content-length": contentLength },
  }))).verifyConfiguredGroups(["TOT Users"], new AbortController().signal);

  await expect(Promise.race([
    completion,
    new Promise((resolve) => setTimeout(() => resolve("timed-out"), 100)),
  ])).resolves.toEqual([expect.objectContaining({ code: "oidc_group_catalog_unreachable" })]);
  expect(cancelled).toBe(true);
  expect(body.locked).toBe(false);
});

test("contains a rejected declared-size cancellation without an unhandled rejection", async () => {
  let cancelled = false;
  const body = new ReadableStream({
    pull() { /* early declared-size rejection must not read */ },
    cancel() {
      cancelled = true;
      return Promise.reject(new Error("cancellation-detail-must-stay-contained"));
    },
  });

  await expect(catalog(vi.fn<typeof globalThis.fetch>(async () => new Response(body, {
    headers: { "content-length": "invalid" },
  }))).verifyConfiguredGroups(["TOT Users"], new AbortController().signal))
    .resolves.toEqual([expect.objectContaining({ code: "oidc_group_catalog_unreachable" })]);
  expect(cancelled).toBe(true);
});

test("aborts a hanging request at five seconds", async () => {
  vi.useFakeTimers();
  try {
    let aborted = false;
    const fetch = vi.fn<typeof globalThis.fetch>((_input, init) => new Promise<Response>((_resolve, reject) => {
      init?.signal?.addEventListener("abort", () => {
        aborted = true;
        reject(new DOMException("aborted", "AbortError"));
      }, { once: true });
    }));
    const completion = catalog(fetch).verifyConfiguredGroups(["TOT Users"], new AbortController().signal);
    await vi.advanceTimersByTimeAsync(5_000);

    await expect(completion).resolves.toEqual([expect.objectContaining({ code: "oidc_group_catalog_unreachable" })]);
    expect(aborted).toBe(true);
  } finally {
    vi.useRealTimers();
  }
});

test("never puts secrets or upstream details in catalog diagnostics", async () => {
  const upstreamDetail = `${apiToken} ${clientSecret} ${passwordHash} ${cookie} ${filePath}`;
  const result = await catalog(vi.fn<typeof globalThis.fetch>(async () => {
    throw new Error(upstreamDetail);
  })).verifyConfiguredGroups(["TOT Users"], new AbortController().signal);

  const rendered = JSON.stringify(result);
  for (const sentinel of [apiToken, clientSecret, passwordHash, cookie, filePath]) expect(rendered).not.toContain(sentinel);
});