// @vitest-environment jsdom
//
// The feed's toolbar, on the feed and on a channel page. The filter pills name their group by a glyph
// (the word moved to the tooltip and the accessible name), Sort + View end the first row instead of
// taking a row of their own, and a channel page drops the count pill: its header already says how
// many videos the channel has.
import { describe, it, expect, vi, beforeAll, afterEach } from "vitest";
import { render, screen, cleanup } from "@testing-library/react";
import { QueryClient, QueryClientProvider } from "@tanstack/react-query";

vi.mock("react-i18next", async (importOriginal) => ({
  ...(await importOriginal<typeof import("react-i18next")>()),
  useTranslation: () => ({ t: (key: string) => key, i18n: { language: "en" } }),
}));
vi.mock("../../features/wizard/wizardContext", () => ({
  useWizard: () => ({ openWizard: vi.fn() }),
}));
vi.mock("./VirtualFeed", () => ({ default: () => null }));
vi.mock("../../features/filters/SelectedViewChip", () => ({ default: () => null }));
vi.mock("../../features/filters/ActiveFilterChips", () => ({ default: () => null }));

import Feed from "./Feed";
import { api, DEFAULT_TAG_MODES, type FeedFilters } from "../../lib/api";
import { qk } from "../../lib/queryKeys";
import { PageToolbarSlot } from "../../components/ui/pageToolbarSlot";

beforeAll(() => {
  class Stub {
    observe() {}
    unobserve() {}
    disconnect() {}
    takeRecords() {
      return [];
    }
  }
  globalThis.ResizeObserver ??= Stub as unknown as typeof ResizeObserver;
  globalThis.IntersectionObserver ??= Stub as unknown as typeof IntersectionObserver;
});
afterEach(() => {
  cleanup();
  vi.restoreAllMocks();
});

const FILTERS: FeedFilters = {
  tags: [],
  tagModes: DEFAULT_TAG_MODES,
  channelIds: [],
  q: "",
  sort: "newest",
  scope: "my",
  includeNormal: true,
  includeShorts: false,
  includeLive: false,
  show: "unwatched",
};

const slot = document.body.appendChild(document.createElement("div"));

async function renderFeed(channelScoped = false) {
  vi.spyOn(api, "feed").mockResolvedValue({ items: [], next_cursor: null } as never);
  vi.spyOn(api, "feedSummary").mockResolvedValue({ count: 12, facets: {} } as never);
  const qc = new QueryClient({ defaultOptions: { queries: { retry: false } } });
  qc.setQueryData(qk.me(), { id: 1, can_write: true, prefs: {} });
  render(
    <QueryClientProvider client={qc}>
      <PageToolbarSlot.Provider value={slot}>
        <Feed
          filters={FILTERS}
          setFilters={() => {}}
          view="cards"
          setView={() => {}}
          canRead
          ytSearch=""
          onYtSearch={() => {}}
          onExitYtSearch={() => {}}
          channelScoped={channelScoped}
        />
      </PageToolbarSlot.Provider>
    </QueryClientProvider>,
  );
  // The toolbar renders once the first page has answered.
  await screen.findByTestId("feed-show");
}

const trigger = (name: string) =>
  screen.getAllByRole("button").find((b) => b.getAttribute("aria-label")?.startsWith(`${name}:`))!;
const sortTrigger = () => trigger("feed.sortLabel");
// The group's glyph, not the trigger's own chevron: the glyph sits in its aria-hidden wrapper.
const glyph = (el: HTMLElement) => el.querySelector('[aria-hidden="true"] > svg');

describe("Feed toolbar", () => {
  it.each([
    ["feed-show", "feed.showLabel"],
    ["feed-content", "feed.contentLabel"],
  ])("the %s pill shows a glyph, not its group's word, and names itself", async (id, word) => {
    await renderFeed();
    const pill = screen.getByTestId(id);
    expect(pill.textContent).not.toContain(word);
    expect(glyph(pill)).not.toBeNull();
    expect(pill.getAttribute("title")).toBe(word);
    expect(pill.getAttribute("aria-label")).toMatch(new RegExp(`^${word}: `));
  });

  it("the sort pill shows a glyph, not the word Sort, and names itself", async () => {
    await renderFeed();
    const sort = sortTrigger();
    expect(sort.textContent).not.toContain("feed.sortLabel");
    expect(glyph(sort)).not.toBeNull();
    expect(sort.getAttribute("title")).toBe("feed.sortLabel");
  });

  it.each([false, true])(
    "Sort and View end the filters' row instead of a row of their own (channel page: %s)",
    async (channelScoped) => {
      await renderFeed(channelScoped);
      const row = screen.getByTestId("feed-show").parentElement!;
      expect(row.contains(sortTrigger())).toBe(true);
      expect(row.contains(trigger("feed.viewLabel"))).toBe(true);
    },
  );

  it("a channel page shows no count pill; the feed keeps it", async () => {
    await renderFeed(true);
    expect(screen.queryByTestId("item-count")).toBeNull();
    cleanup();
    await renderFeed(false);
    expect(screen.getByTestId("item-count")).toBeTruthy();
  });
});