// @vitest-environment jsdom
//
// The Home surface's slice builds its own query strings, and the Home DOM tests mock this module —
// so nothing else in the suite ever looks at the URL that actually goes out. That gap hid a live
// parameter once already: the reroll's `start` reached `api.discoverPick` and stopped there.
import { describe, it, expect, beforeEach, afterEach, vi } from "vitest";
import { discoverApi } from "./discover";

const fetchMock = vi.fn();

beforeEach(() => {
  fetchMock.mockReset().mockResolvedValue({
    ok: true,
    status: 200,
    headers: new Headers({ "content-type": "application/json" }),
    json: async () => ({}),
    text: async () => "{}",
  });
  vi.stubGlobal("fetch", fetchMock);
});
afterEach(() => vi.unstubAllGlobals());

// Indexed, not `.at(-1)`: the e2e tsconfig's lib target predates it, and the gate typechecks three
// projects.
const lastUrl = (): string => {
  const calls = fetchMock.mock.calls;
  return String(calls[calls.length - 1]?.[0]);
};

describe("discoverApi query strings", () => {
  it("sends the press count as `start` — the tier rotation lives on the wire", async () => {
    await discoverApi.discoverPick("medium", 42, [], 3);
    expect(lastUrl()).toContain("start=3");
    expect(lastUrl()).toContain("budget=medium");
    expect(lastUrl()).toContain("seed=42");
  });

  it("sends the press count even on the first press, so `start` is never implied", async () => {
    await discoverApi.discoverPick("any", 7);
    expect(lastUrl()).toContain("start=0");
  });

  it("encodes the exclusion list, whose keys carry a colon", async () => {
    await discoverApi.discoverPick("any", 1, ["youtube:abc", "plex:99"], 2);
    expect(lastUrl()).toContain(`exclude=${encodeURIComponent("youtube:abc,plex:99")}`);
  });

  it("omits `exclude` entirely when there is nothing to exclude", async () => {
    await discoverApi.discoverPick("any", 1, [], 0);
    expect(lastUrl()).not.toContain("exclude=");
  });
});