// @vitest-environment jsdom
//
// The Plex player's controls on touch and the C5 control set (DESIGN "Players", E28 S3f2): a tap on
// the picture only shows or hides the controls, a double-tap on a side third skips 10 s, Back goes by
// position, Next exists only with a next item, the rare tools sit behind a fixed ⋯, and the card's
// Restart opens the player at 0. jsdom has no media pipeline: the <video> is stubbed as in
// PlexPlayer.session.dom.test.tsx, and where the player asks a session to start is the observable.
import { describe, it, expect, vi, beforeAll, beforeEach, afterEach } from "vitest";
import { render, cleanup, waitFor, screen, fireEvent, act } from "@testing-library/react";
import { QueryClient, QueryClientProvider } from "@tanstack/react-query";

vi.mock("react-i18next", async (importOriginal) => {
  const actual = await importOriginal<typeof import("react-i18next")>();
  return {
    ...actual,
    useTranslation: () => ({
      t: (key: string, o?: { n?: number }) => (o?.n != null ? `${key}:${o.n}` : key),
      i18n: { language: "en" },
    }),
  };
});

import PlexPlayer from "./PlexPlayer";
import { api, type PlexItemDetail } from "../lib/api";
import { ACTIVE_ACCOUNT_KEY } from "../lib/activeAccount";

type Media = HTMLMediaElement & { _t?: number; _paused?: boolean };

beforeAll(() => {
  class Stub {
    observe() {}
    unobserve() {}
    disconnect() {}
    takeRecords() {
      return [];
    }
  }
  globalThis.ResizeObserver ??= Stub as unknown as typeof ResizeObserver;
  globalThis.IntersectionObserver ??= Stub as unknown as typeof IntersectionObserver;
  // jsdom has no PointerEvent, and the player tells a finger from a mouse by `pointerType`.
  class PointerEventStub extends MouseEvent {
    pointerType: string;
    constructor(type: string, init: PointerEventInit = {}) {
      super(type, init);
      this.pointerType = init.pointerType ?? "mouse";
    }
  }
  globalThis.PointerEvent ??= PointerEventStub as unknown as typeof PointerEvent;
  Object.defineProperty(HTMLMediaElement.prototype, "currentTime", {
    configurable: true,
    get(this: Media) {
      return this._t ?? 0;
    },
    set(this: Media, v: number) {
      this._t = v;
    },
  });
  Object.defineProperty(HTMLMediaElement.prototype, "paused", {
    configurable: true,
    get(this: Media) {
      return this._paused ?? true;
    },
  });
  Object.defineProperty(HTMLMediaElement.prototype, "load", {
    configurable: true,
    value(this: Media) {
      this._t = 0;
    },
  });
  Object.defineProperty(HTMLMediaElement.prototype, "seekable", {
    configurable: true,
    get: () => ({ length: 0, end: () => 0 }),
  });
  Object.defineProperty(HTMLMediaElement.prototype, "textTracks", {
    configurable: true,
    get: () => Object.assign([], { addEventListener() {}, removeEventListener() {} }),
  });
});

let play: ReturnType<typeof vi.fn>;
let pause: ReturnType<typeof vi.fn>;
beforeEach(() => {
  sessionStorage.setItem(ACTIVE_ACCOUNT_KEY, "7");
  play = vi.fn(function (this: Media) {
    this._paused = false;
    this.dispatchEvent(new Event("play"));
    return Promise.resolve();
  });
  pause = vi.fn(function (this: Media) {
    this._paused = true;
    this.dispatchEvent(new Event("pause"));
  });
  Object.defineProperty(HTMLMediaElement.prototype, "play", { configurable: true, value: play });
  Object.defineProperty(HTMLMediaElement.prototype, "pause", { configurable: true, value: pause });
});

afterEach(() => {
  cleanup();
  vi.restoreAllMocks();
  vi.useRealTimers();
  sessionStorage.clear();
  localStorage.clear();
});

const item = (id: string, position = 0, next: string | null = null): PlexItemDetail =>
  ({
    id,
    title: `Title ${id}`,
    type: "movie",
    duration_seconds: 3000,
    status: "new",
    position_seconds: position,
    next_id: next,
    prev_id: null,
    audio_streams: [{ ord: 0, label: "English", language: "en", default: true }],
    subtitle_streams: [],
    markers: [],
  }) as unknown as PlexItemDetail;

const direct = (id: string) =>
  ({ mode: "direct", url: `/media/${id}`, start_s: 0 }) as Awaited<
    ReturnType<typeof api.plexSession>
  >;

function mount(opts: {
  details: Record<string, PlexItemDetail>;
  queue?: string[];
  first?: string;
  fromStart?: boolean;
}) {
  vi.spyOn(api, "plexItem").mockImplementation((id: string) => Promise.resolve(opts.details[id]!));
  const session = vi
    .spyOn(api, "plexSession")
    .mockImplementation((id: string) => Promise.resolve(direct(id)));
  vi.spyOn(api, "plexProgress").mockResolvedValue(undefined as never);
  vi.spyOn(api, "plexSubtitleStatus").mockResolvedValue({ state: "preparing", code: null, gen: 0 });
  const qc = new QueryClient({ defaultOptions: { queries: { retry: false } } });
  const first = opts.first ?? opts.queue?.[0] ?? Object.keys(opts.details)[0]!;
  render(
    <QueryClientProvider client={qc}>
      <PlexPlayer itemId={first} onClose={() => {}} queue={opts.queue} fromStart={opts.fromStart} />
    </QueryClientProvider>,
  );
  return { session };
}

const video = () => document.querySelector("video") as Media;

/** Which item the player last asked a session for, and where in it. */
const lastStart = (session: { mock: { calls: unknown[][] } }) =>
  session.mock.calls[session.mock.calls.length - 1]?.slice(0, 2);

async function playingAt(src: string, t: number) {
  await waitFor(() => expect(video()?.getAttribute("src")).toBe(src));
  const v = video();
  v._t = t;
  act(() => void v.dispatchEvent(new Event("timeupdate")));
}

/** The bottom band (the seek bar and the row): hidden = faded AND out of the pointer's way. */
const bandHidden = () =>
  screen
    .getByLabelText("plex.player.playPause")
    .closest("[class*='bottom-0']")!
    .className.includes("opacity-0");

/** A press on the picture, from a finger or a mouse, at `x` of a 900px-wide picture. */
function pressPicture(pointerType: "touch" | "mouse", x = 450) {
  const v = video();
  vi.spyOn(v, "getBoundingClientRect").mockReturnValue({
    left: 0,
    top: 0,
    width: 900,
    height: 500,
    right: 900,
    bottom: 500,
    x: 0,
    y: 0,
    toJSON: () => ({}),
  });
  fireEvent.pointerDown(v, { pointerType });
  fireEvent.click(v, { clientX: x, clientY: 250 });
}

describe("a tap on the picture (C3)", () => {
  it("a mouse click plays or pauses; a finger's tap only shows or hides the controls", async () => {
    mount({ details: { A: item("A") } });
    await playingAt("/media/A", 100);
    const plays = play.mock.calls.length;
    const pauses = pause.mock.calls.length;

    pressPicture("touch");
    expect(bandHidden()).toBe(true);
    pressPicture("touch");
    expect(bandHidden()).toBe(false);
    expect(play.mock.calls.length).toBe(plays);
    expect(pause.mock.calls.length).toBe(pauses);

    pressPicture("mouse");
    expect(play.mock.calls.length + pause.mock.calls.length).toBe(plays + pauses + 1);
  });

  it("the hide timer starts with playback, not with the first touch", async () => {
    mount({ details: { A: item("A") } });
    await playingAt("/media/A", 100);
    vi.useFakeTimers();
    video()._paused = true;
    act(() => void video().play());
    expect(bandHidden()).toBe(false);
    act(() => vi.advanceTimersByTime(3000));
    expect(bandHidden()).toBe(true);
  });
});

describe("a double-tap on a side third skips 10 s (C5)", () => {
  it("skips from where it plays, again for each further tap, and takes back the first tap's toggle", async () => {
    const { session } = mount({ details: { A: item("A") } });
    await playingAt("/media/A", 1500);
    expect(bandHidden()).toBe(false);

    pressPicture("touch", 800);
    expect(bandHidden()).toBe(true); // the first tap alone is a toggle…
    pressPicture("touch", 800);
    expect(bandHidden()).toBe(false); // …which the second takes back
    await waitFor(() => expect(lastStart(session)).toEqual(["A", 1510]));
    expect(screen.getByText("plex.player.tapForward:10")).toBeTruthy();

    pressPicture("touch", 800);
    await waitFor(() => expect(lastStart(session)).toEqual(["A", 1520]));
    expect(screen.getByText("plex.player.tapForward:20")).toBeTruthy();

    pressPicture("touch", 50); // the other side, a fresh first tap: a toggle, no skip
    expect(lastStart(session)).toEqual(["A", 1520]);
  });

  it("the middle third never skips: a quick second tap there just toggles back", async () => {
    const { session } = mount({ details: { A: item("A") } });
    await playingAt("/media/A", 1500);
    const calls = session.mock.calls.length;
    pressPicture("touch", 450);
    pressPicture("touch", 450);
    expect(bandHidden()).toBe(false);
    expect(session.mock.calls.length).toBe(calls);
  });

  it("the left third skips back", async () => {
    const { session } = mount({ details: { A: item("A") } });
    await playingAt("/media/A", 1500);
    pressPicture("touch", 100);
    pressPicture("touch", 100);
    await waitFor(() => expect(lastStart(session)).toEqual(["A", 1490]));
    expect(screen.getByText("plex.player.tapBack:10")).toBeTruthy();
  });
});

describe("the C5 row", () => {
  it("has no Stop, Restart or ±10 s buttons, and keeps the rare tools behind the ⋯", async () => {
    mount({ details: { A: item("A") } });
    await playingAt("/media/A", 100);
    for (const gone of [
      "plex.player.stop",
      "plex.player.rewind10",
      "plex.player.forward10",
      "plex.player.stats.title",
      "plex.player.infoBtn",
      "plex.player.help",
      "plex.player.download",
      "plex.player.settings",
    ])
      expect(screen.queryByLabelText(gone), gone).toBeNull();
    fireEvent.click(screen.getByLabelText("plex.player.more"));
    const rows = [
      "plex.player.settings",
      "plex.player.infoBtn",
      "plex.player.stats.title",
      "plex.player.help",
      "plex.player.download",
    ];
    for (const r of rows) expect(screen.getByRole("button", { name: r }), r).toBeTruthy();
    // A row closes the menu and opens its tool: Settings → the tuning panel.
    fireEvent.click(screen.getByRole("button", { name: "plex.player.settings" }));
    expect(screen.queryByRole("button", { name: "plex.player.stats.title" })).toBeNull();
    expect(screen.getByLabelText("plex.player.more").getAttribute("aria-expanded")).toBe("true");
  });

  it("Next shows only when there is a next item", async () => {
    mount({ details: { A: item("A") } });
    await playingAt("/media/A", 100);
    expect(screen.queryByLabelText("plex.player.next")).toBeNull();
    cleanup();
    mount({ details: { A: item("A"), B: item("B") }, queue: ["A", "B"] });
    await playingAt("/media/A", 100);
    expect(screen.getByLabelText("plex.player.next")).toBeTruthy();
  });
});

describe("Back goes by position (C5)", () => {
  it("more than 3 s in: back to the start of this item", async () => {
    // B opened at its resume point, so a session asked at 0 can only be the restart.
    const { session } = mount({
      details: { A: item("A"), B: item("B", 900) },
      queue: ["A", "B"],
      first: "B",
    });
    await playingAt("/media/B", 40);
    fireEvent.click(screen.getByLabelText("plex.player.restart"));
    // Inside the loaded media the restart is a native seek: the clock goes to 0, on B.
    await waitFor(() => expect(video()._t).toBe(0));
    expect(lastStart(session)?.[0]).toBe("B");
  });

  it("within the first 3 s: the previous item, at its resume point", async () => {
    const { session } = mount({
      details: { A: item("A", 700), B: item("B") },
      queue: ["A", "B"],
      first: "B",
    });
    await playingAt("/media/B", 2);
    fireEvent.click(screen.getByLabelText("plex.player.prev"));
    await waitFor(() => expect(lastStart(session)).toEqual(["A", 700]));
  });

  it("the first item has only the restart", async () => {
    const { session } = mount({ details: { A: item("A", 900), B: item("B") }, queue: ["A", "B"] });
    await playingAt("/media/A", 2);
    expect(screen.queryByLabelText("plex.player.prev")).toBeNull();
    fireEvent.click(screen.getByLabelText("plex.player.restart"));
    await waitFor(() => expect(video()._t).toBe(0));
    expect(lastStart(session)?.[0]).toBe("A");
  });
});

describe("the card's Restart (C5)", () => {
  it("opens the item at 0 instead of its resume point", async () => {
    const { session } = mount({ details: { A: item("A", 900) }, fromStart: true });
    await waitFor(() => expect(session).toHaveBeenCalled());
    expect(session.mock.calls[0]![1]).toBe(0);
  });

  it("without it, the item resumes", async () => {
    const { session } = mount({ details: { A: item("A", 900) } });
    await waitFor(() => expect(session).toHaveBeenCalled());
    expect(session.mock.calls[0]![1]).toBe(900);
  });

  it("only for the item it opened with: the next one resumes", async () => {
    const { session } = mount({
      details: { A: item("A", 900), B: item("B", 300) },
      queue: ["A", "B"],
      fromStart: true,
    });
    await playingAt("/media/A", 100);
    fireEvent.click(screen.getByLabelText("plex.player.next"));
    await waitFor(() => expect(lastStart(session)).toEqual(["B", 300]));
  });
});

describe("the seek bar (C3)", () => {
  it("is a 2.75rem hit area a finger drags without panning, with the head shown on touch", async () => {
    mount({ details: { A: item("A") } });
    await playingAt("/media/A", 100);
    const hit = document.querySelector<HTMLElement>(".touch-none.h-11");
    expect(hit).not.toBeNull();
    const head = hit!.querySelector("[class*='rounded-full'][class*='w-3']");
    expect(head?.className).toContain("[@media(hover:none)]:opacity-100");
  });
});