// @vitest-environment jsdom
//
// The Download Center's queue: a row keeps its primary action (pause / resume / retry) in sight, and
// the copies and cancel are its ONE menu, opened by the row's "…" (it shows on hover or focus) or a
// right-click on the row. A finished download's row is the Files page's (Files.menu.dom.test.tsx).
// i18n is key-passthrough, so labels read as keys.
import { afterEach, describe, expect, it, vi } from "vitest";
import { act, cleanup, fireEvent, render, screen, waitFor } from "@testing-library/react";
import { QueryClient, QueryClientProvider } from "@tanstack/react-query";
import { api, type DownloadJob } from "../lib/api";
import { menuGroups } from "./ui/menuGroups";

const mocks = vi.hoisted(() => ({
  jobs: [] as unknown[],
  confirm: vi.fn(async (_o?: unknown) => true),
}));

vi.mock("react-i18next", async (importOriginal) => {
  const actual = await importOriginal<typeof import("react-i18next")>();
  return {
    ...actual,
    useTranslation: () => ({ i18n: { language: "en" }, t: (key: string) => key }),
  };
});
vi.mock("./confirmContext", () => ({ useConfirm: () => mocks.confirm }));
vi.mock("../lib/useLiveQuery", () => ({
  useLiveQuery: (key: readonly unknown[]) => ({
    data: key[0] === "downloads" ? mocks.jobs : undefined,
    isError: false,
    isLoading: false,
    refetch: vi.fn(),
  }),
}));
vi.mock("../lib/useMe", () => ({ useMe: () => ({ role: "user" }) }));
vi.mock("./ui/PageShell", async (importOriginal) => ({
  ...(await importOriginal<typeof import("./ui/PageShell")>()),
  PageToolbar: ({ children }: { children: React.ReactNode }) => <>{children}</>,
}));

import DownloadCenter from "./DownloadCenter";

const job = (
  id: number,
  status: DownloadJob["status"],
  extra: Partial<DownloadJob> = {},
): DownloadJob =>
  ({
    id,
    status,
    progress: 0,
    speed_bps: null,
    eta_s: null,
    phase: null,
    error: null,
    error_code: null,
    error_detail: null,
    queue_pos: 0,
    created_at: null,
    source_kind: "youtube",
    source_ref: `v${id}`,
    source_url: null,
    poster_url: null,
    profile_id: null,
    spec: { mode: "av" },
    display_name: `Clip ${id}`,
    display_uploader: null,
    display_uploader_url: null,
    extra_links: [],
    can_download: status === "done",
    job_kind: "download",
    asset: { media_kind: "video", duration_s: 60 },
    ...extra,
  }) as unknown as DownloadJob;

afterEach(() => {
  cleanup();
  vi.restoreAllMocks();
  mocks.confirm.mockClear();
});

function mount(tab?: string) {
  render(
    <QueryClientProvider client={new QueryClient()}>
      <DownloadCenter />
    </QueryClientProvider>,
  );
  if (tab)
    fireEvent.click(screen.getByRole("tab", { name: new RegExp(`downloads\\.tabs\\.${tab}`) }));
}

const rowOf = (text: string) => screen.getByText(text).closest<HTMLElement>("[data-nav-index]")!;
const moreOf = (text: string) =>
  rowOf(text).querySelector<HTMLElement>('button[aria-label="downloads.rowMenu"]')!;
const menuRows = () =>
  screen.getAllByRole("menuitem", { hidden: true }).map((b) => b.textContent ?? "");
async function openMenu(open: () => void) {
  act(open);
  await waitFor(() =>
    expect(screen.getAllByRole("menuitem", { hidden: true }).length).toBeGreaterThan(0),
  );
}
const rowButtons = (text: string) =>
  [...rowOf(text).querySelectorAll<HTMLElement>("button, a[aria-label]")].map((b) =>
    b.getAttribute("aria-label"),
  );

describe("DownloadCenter · the queue row", () => {
  it("shows pause and its '…' only; the '…' hides until hover or focus", async () => {
    mocks.jobs = [job(1, "running")];
    mount();
    expect(rowButtons("Clip 1")).toEqual(["downloads.actions.pause", "downloads.rowMenu"]);
    expect(moreOf("Clip 1").classList.contains("reveal")).toBe(true);
    expect(rowOf("Clip 1").classList.contains("group")).toBe(true);
  });

  it("holds pause, the copies and cancel; a failed job's first row is Retry", async () => {
    mocks.jobs = [job(1, "running", { source_url: "https://youtu.be/x" }), job(2, "error")];
    mount();
    await openMenu(() => fireEvent.click(moreOf("Clip 1")));
    expect(menuRows()).toEqual([
      "downloads.actions.pause",
      "common.copy.title",
      "common.copy.link",
      "downloads.actions.cancel",
    ]);
    expect(moreOf("Clip 1").getAttribute("aria-expanded")).toBe("true");
    fireEvent.keyDown(document.activeElement!, { key: "Escape" });
    await openMenu(() => fireEvent.contextMenu(rowOf("Clip 2")));
    expect(menuRows()).toEqual([
      "downloads.actions.retry",
      "common.copy.title",
      "downloads.actions.cancel",
    ]);
  });

  it("draws Retry as 'do it again', never the Play glyph (row and menu)", async () => {
    mocks.jobs = [job(1, "error"), job(2, "paused")];
    mount();
    const glyph = (el: Element) => el.querySelector("svg")?.getAttribute("class") ?? "";
    const retry = rowOf("Clip 1").querySelector('[aria-label="downloads.actions.retry"]')!;
    expect(glyph(retry)).toContain("lucide-refresh-cw");
    // A paused job resumes: that one keeps the transport glyph.
    const resume = rowOf("Clip 2").querySelector('[aria-label="downloads.actions.resume"]')!;
    expect(glyph(resume)).toContain("lucide-play");
    await openMenu(() => fireEvent.contextMenu(rowOf("Clip 1")));
    const row = screen
      .getAllByRole("menuitem", { hidden: true })
      .find((b) => b.textContent === "downloads.actions.retry")!;
    expect(glyph(row)).toContain("lucide-refresh-cw");
  });

  it("closes on a second press of the same '…'", async () => {
    mocks.jobs = [job(1, "running")];
    mount();
    await openMenu(() => fireEvent.click(moreOf("Clip 1")));
    // The press lands outside the panel, which floating-ui's dismiss closes on; the click after
    // it must not open it again.
    act(() => {
      fireEvent.pointerDown(moreOf("Clip 1"), { pointerType: "mouse" });
      fireEvent.mouseDown(moreOf("Clip 1"));
      fireEvent.click(moreOf("Clip 1"), { detail: 1 });
    });
    await waitFor(() =>
      expect(screen.queryAllByRole("menuitem", { hidden: true })).toHaveLength(0),
    );
    expect(moreOf("Clip 1").getAttribute("aria-expanded")).toBe("false");
  });

  it("still closes when a poll replaced the job under the open menu", async () => {
    mocks.jobs = [job(1, "running")];
    mount();
    await openMenu(() => fireEvent.click(moreOf("Clip 1")));
    // The queue polls while a job runs: the next render lists a NEW object for the same job.
    mocks.jobs = [job(1, "running", { progress: 40 })];
    fireEvent.change(screen.getByPlaceholderText("downloads.page.addUrl"), {
      target: { value: "x" },
    });
    act(() => {
      fireEvent.pointerDown(moreOf("Clip 1"), { pointerType: "mouse" });
      fireEvent.mouseDown(moreOf("Clip 1"));
      fireEvent.click(moreOf("Clip 1"), { detail: 1 });
    });
    await waitFor(() =>
      expect(screen.queryAllByRole("menuitem", { hidden: true })).toHaveLength(0),
    );
  });

  it("cancels only through the confirm", async () => {
    mocks.jobs = [job(1, "queued")];
    const cancel = vi.spyOn(api, "cancelDownload").mockResolvedValue({} as never);
    mount();
    const pickCancel = async () => {
      await openMenu(() => fireEvent.click(moreOf("Clip 1")));
      fireEvent.click(
        screen
          .getAllByRole("menuitem", { hidden: true })
          .find((b) => b.textContent === "downloads.actions.cancel")!,
      );
    };
    mocks.confirm.mockResolvedValueOnce(false);
    await pickCancel();
    await waitFor(() => expect(mocks.confirm).toHaveBeenCalledTimes(1));
    expect(mocks.confirm).toHaveBeenCalledWith(expect.objectContaining({ danger: true }));
    expect(cancel).not.toHaveBeenCalled();
    await pickCancel();
    await waitFor(() => expect(cancel).toHaveBeenCalledWith(1));
  });
});

describe("menuGroups", () => {
  const row = (id: string) => ({ id, label: id, onSelect: () => {} });
  it("rules between non-empty groups only", () => {
    const out = menuGroups([], [row("a"), row("b")], [], [row("c")]);
    expect(out.map((r) => [r.id, !!r.separatorBefore])).toEqual([
      ["a", false],
      ["b", false],
      ["c", true],
    ]);
  });
});