// @vitest-environment jsdom
//
// The public watch page must render a native <audio> element for an audio-only asset
// (mp3) and a <video> for everything else. WebKit (all iOS browsers) refuses to play an audio-only
// mp3 inside a <video>, which is exactly why the branch exists — this locks it so a refactor can't
// silently drop the audio player and reintroduce the iPad-broken behavior.
import { afterEach, describe, expect, it, vi } from "vitest";
import { render, waitFor, cleanup, fireEvent } from "@testing-library/react";
const expose = vi.hoisted(() => vi.fn());
vi.mock("../lib/browserBackgroundPlay", () => ({ exposeVideoToBackgroundPlay: expose }));

import WatchPage from "./WatchPage";

function mockMeta(meta: Record<string, unknown>) {
  vi.stubGlobal(
    "fetch",
    vi.fn(async () => ({ ok: true, json: async () => meta })),
  );
}

afterEach(() => {
  cleanup();
  vi.unstubAllGlobals();
  localStorage.clear();
});

describe("WatchPage background play", () => {
  it("hands its <video> to the background-play hook, so Brave iOS keeps it playing", async () => {
    window.history.replaceState({}, "", "/watch/tok-bg");
    mockMeta({ needs_password: false, audio: false, file_url: "/f.mp4", title: "A clip" });
    const { container } = render(<WatchPage />);
    await waitFor(() => expect(container.querySelector("video")).not.toBeNull());
    expect(expose).toHaveBeenCalledWith(container.querySelector("video"));
  });
});

describe("WatchPage repeat", () => {
  it("repeats by default, for a video and for an audio-only asset", async () => {
    window.history.replaceState({}, "", "/watch/tok-repeat-video");
    mockMeta({ needs_password: false, audio: false, file_url: "/f.mp4", title: "A clip" });
    const video = render(<WatchPage />);
    await waitFor(() => expect(video.container.querySelector("video")).not.toBeNull());
    expect(video.container.querySelector("video")!.loop).toBe(true);
    cleanup();

    window.history.replaceState({}, "", "/watch/tok-repeat-audio");
    mockMeta({ needs_password: false, audio: true, file_url: "/f.mp3", title: "A song" });
    const audio = render(<WatchPage />);
    await waitFor(() => expect(audio.container.querySelector("audio")).not.toBeNull());
    expect(audio.container.querySelector("audio")!.loop).toBe(true);
  });

  it("the toggle turns it off, and the choice is remembered for the next visit", async () => {
    window.history.replaceState({}, "", "/watch/tok-repeat-toggle");
    mockMeta({ needs_password: false, audio: false, file_url: "/f.mp4", title: "A clip" });
    const first = render(<WatchPage />);
    const toggle = await first.findByRole("button", { name: "Repeat" });
    expect(toggle.getAttribute("aria-pressed")).toBe("true");
    fireEvent.click(toggle);
    expect(toggle.getAttribute("aria-pressed")).toBe("false");
    expect(first.container.querySelector("video")!.loop).toBe(false);
    cleanup();

    const second = render(<WatchPage />);
    await waitFor(() => expect(second.container.querySelector("video")).not.toBeNull());
    expect(second.container.querySelector("video")!.loop).toBe(false);
  });
});

// The Download link sat at the button's 32 beside the Repeat chip's 28 — one row, two heights.
describe("WatchPage action row", () => {
  it("puts the Download on the toolbar rung, level with the Repeat chip", async () => {
    window.history.replaceState({}, "", "/watch/tok-row");
    mockMeta({
      needs_password: false,
      audio: false,
      allow_download: true,
      file_url: "/f.mp4",
      title: "A clip",
    });
    const view = render(<WatchPage />);
    const repeat = await view.findByRole("button", { name: "Repeat" });
    const download = view.container.querySelector('a[href="/f.mp4"]')!;
    expect(repeat.className).toContain("h-7");
    expect(download.className).toContain("h-7");
  });

  // DESIGN B6: the page the stranger sees wears the app's surfaces — the scheme's ambient
  // backdrop (no page fill over the body's), the title and actions on a glass panel, a glass Download.
  it("sits on the app's surfaces: backdrop, a glass panel, a glass Download", async () => {
    window.history.replaceState({}, "", "/watch/tok-b6");
    mockMeta({
      needs_password: false,
      audio: false,
      allow_download: true,
      file_url: "/f.mp4",
      title: "A clip",
    });
    const view = render(<WatchPage />);
    const title = await view.findByRole("heading", { name: "A clip" });
    expect((view.container.firstElementChild as HTMLElement).className).not.toMatch(
      /(^|\s)bg-bg(\s|$)/,
    );
    expect(title.closest(".glass")).toBeTruthy();
    const download = view.container.querySelector('a[href="/f.mp4"]')!;
    expect(download.className).toContain("glass-card");
  });
});

describe("WatchPage media element", () => {
  it("renders a native <audio> for an audio-only asset", async () => {
    window.history.replaceState({}, "", "/watch/tok-audio");
    mockMeta({ needs_password: false, audio: true, file_url: "/f.mp3", title: "A song" });
    const { container } = render(<WatchPage />);
    await waitFor(() => expect(container.querySelector("audio")).not.toBeNull());
    expect(container.querySelector("video")).toBeNull();
  });

  it("renders a <video> for a normal video asset", async () => {
    window.history.replaceState({}, "", "/watch/tok-video");
    mockMeta({ needs_password: false, audio: false, file_url: "/f.mp4", title: "A clip" });
    const { container } = render(<WatchPage />);
    await waitFor(() => expect(container.querySelector("video")).not.toBeNull());
    expect(container.querySelector("audio")).toBeNull();
  });

  it("renders an info card + Download for a generic file, no player", async () => {
    window.history.replaceState({}, "", "/watch/tok-file");
    mockMeta({
      needs_password: false,
      media_kind: "file",
      title: "report.pdf",
      container: "pdf",
      size_bytes: 2_400_000,
      allow_download: true,
      file_url: "/f.pdf",
    });
    const { container, findByText } = render(<WatchPage />);
    await findByText("report.pdf");
    expect(container.querySelector("video")).toBeNull();
    expect(container.querySelector("audio")).toBeNull();
    // Type · size chip and a Download link to the file.
    await findByText(/PDF · 2\.3 MB/);
    const dl = container.querySelector('a[href="/f.pdf"]');
    expect(dl).not.toBeNull();
    // The page's one action is the filled primary, not a muted outline.
    expect(dl!.className).toContain("state-filled");
  });

  it("omits the Download for a view-only file link", async () => {
    window.history.replaceState({}, "", "/watch/tok-file-noview");
    mockMeta({
      needs_password: false,
      media_kind: "file",
      title: "secret.zip",
      container: "zip",
      size_bytes: 1000,
      allow_download: false,
      file_url: "/f.zip",
    });
    const { container, findByText } = render(<WatchPage />);
    await findByText("secret.zip");
    expect(container.querySelector('a[href="/f.zip"]')).toBeNull();
  });
});

// Only a 404 means a link is gone. Every other failure used to render the permanent "no longer
// available" state too: a server restart, a dropped connection, and the unlock's own rate limit told a
// viewer with a valid link that it had expired or been revoked, with no way to try again.
describe("WatchPage honest failures", () => {
  const res = (status: number, body: unknown = {}) => ({
    ok: status < 400,
    status,
    json: async () => body,
  });
  const GONE = "This link is no longer available.";

  it("a server error is a failure with a retry, not a dead link", async () => {
    window.history.replaceState({}, "", "/watch/tok-5xx");
    vi.stubGlobal(
      "fetch",
      vi
        .fn()
        .mockResolvedValueOnce(res(503))
        .mockResolvedValue(
          res(200, { needs_password: false, file_url: "/f.mp4", title: "A clip" }),
        ),
    );
    const page = render(<WatchPage />);
    const retry = await page.findByRole("button", { name: "Try again" });
    expect(page.queryByText(GONE)).toBeNull();
    expect(page.getByRole("alert").textContent).toContain("Couldn't load this link.");

    fireEvent.click(retry);
    await waitFor(() => expect(page.container.querySelector("video")).not.toBeNull());
  });

  it("a dropped connection is a failure with a retry too", async () => {
    window.history.replaceState({}, "", "/watch/tok-offline");
    vi.stubGlobal("fetch", vi.fn().mockRejectedValue(new TypeError("Failed to fetch")));
    const page = render(<WatchPage />);
    await page.findByRole("button", { name: "Try again" });
    expect(page.queryByText(GONE)).toBeNull();
  });

  it("a 404 says the link is gone", async () => {
    window.history.replaceState({}, "", "/watch/tok-404");
    vi.stubGlobal("fetch", vi.fn().mockResolvedValue(res(404)));
    const page = render(<WatchPage />);
    await page.findByText(GONE);
    expect(page.queryByRole("button", { name: "Try again" })).toBeNull();
  });

  it("a 404 whose video is being made again says to come back, with a retry", async () => {
    window.history.replaceState({}, "", "/watch/tok-preparing");
    vi.stubGlobal(
      "fetch",
      vi
        .fn()
        .mockResolvedValueOnce(res(404, { detail: { code: 404, reason: "video_preparing" } }))
        .mockResolvedValue(
          res(200, { needs_password: false, file_url: "/f.mp4", title: "A clip" }),
        ),
    );
    const page = render(<WatchPage />);
    const retry = await page.findByRole("button", { name: "Try again" });
    expect(page.getByRole("alert").textContent).toContain("This video is being prepared.");
    expect(page.queryByText(GONE)).toBeNull();

    fireEvent.click(retry);
    await waitFor(() => expect(page.container.querySelector("video")).not.toBeNull());
  });

  it("a Retry that is answered 'still preparing' says so and keeps the focus on Retry", async () => {
    // The answer replaces the button the viewer was on: announced (an alert, inserted filled), and
    // the new Retry takes the focus instead of leaving it on <body>.
    window.history.replaceState({}, "", "/watch/tok-preparing");
    const preparing = () => res(404, { detail: { code: 404, reason: "video_preparing" } });
    vi.stubGlobal(
      "fetch",
      vi.fn().mockImplementation(() => Promise.resolve(preparing())),
    );
    const page = render(<WatchPage />);
    const first = await page.findByRole("button", { name: "Try again" });
    expect(document.activeElement).not.toBe(first); // the first load moves no focus

    fireEvent.click(first);
    await waitFor(() =>
      expect(document.activeElement).toBe(page.getByRole("button", { name: "Try again" })),
    );
    expect(page.getByRole("alert").textContent).toContain("This video is being prepared.");
  });

  async function tryPassword(second: () => Promise<unknown>) {
    vi.stubGlobal(
      "fetch",
      vi
        .fn()
        .mockResolvedValueOnce(res(200, { needs_password: true }))
        .mockImplementationOnce(second),
    );
    const page = render(<WatchPage />);
    fireEvent.change(await page.findByPlaceholderText("Enter password"), {
      target: { value: "guess" },
    });
    fireEvent.click(page.getByRole("button", { name: "Watch" }));
    return page;
  }

  it("too many password tries says so, and keeps the form", async () => {
    window.history.replaceState({}, "", "/watch/tok-429");
    const page = await tryPassword(async () => res(429));
    await page.findByText("Too many attempts. Try again in a few minutes.");
    const alert = page.getByRole("alert");
    expect(alert.textContent).toBe("Too many attempts. Try again in a few minutes.");
    expect(page.getByPlaceholderText("Enter password").getAttribute("aria-describedby")).toBe(
      alert.id,
    );
  });

  it("an unlock that gets no answer says so instead of doing nothing", async () => {
    window.history.replaceState({}, "", "/watch/tok-unlock-offline");
    const page = await tryPassword(() => Promise.reject(new TypeError("Failed to fetch")));
    expect((await page.findByRole("alert")).textContent).toBe(
      "Couldn't check the password. Try again.",
    );
  });
});

// A shared link opens where THIS browser stopped in it (the viewer has no account), and keeps the
// point as it plays — per link, so another link starts at its own place.
describe("WatchPage resume", () => {
  function loaded(video: HTMLVideoElement, duration = 600) {
    let t = 0;
    Object.defineProperties(video, {
      currentTime: { get: () => t, set: (v: number) => void (t = v), configurable: true },
      duration: { get: () => duration, configurable: true },
      readyState: { get: () => 1, configurable: true },
    });
    video.dispatchEvent(new Event("loadedmetadata"));
    return video;
  }

  it("keeps where it stopped, and opens there on the next visit", async () => {
    window.history.replaceState({}, "", "/watch/tok-resume");
    mockMeta({ needs_password: false, audio: false, file_url: "/f.mp4", title: "A clip" });
    const first = render(<WatchPage />);
    await waitFor(() => expect(first.container.querySelector("video")).not.toBeNull());
    const video = loaded(first.container.querySelector("video")!);
    expect(video.currentTime).toBe(0);
    video.dispatchEvent(new Event("playing"));
    video.currentTime = 250;
    video.dispatchEvent(new Event("pause"));
    cleanup();

    const second = render(<WatchPage />);
    await waitFor(() => expect(second.container.querySelector("video")).not.toBeNull());
    expect(loaded(second.container.querySelector("video")!).currentTime).toBe(250);
    cleanup();

    window.history.replaceState({}, "", "/watch/tok-other");
    const other = render(<WatchPage />);
    await waitFor(() => expect(other.container.querySelector("video")).not.toBeNull());
    expect(loaded(other.container.querySelector("video")!).currentTime).toBe(0);
  });
});