/**
 * Regression tests for the video player's track / quality / subtitle menus,
 * rendered against the REAL component.
 *
 * TRACES: UR-020, UR-021, UR-066, UR-074 | DR-256 | UT-227, UT-228
 *
 * Two defects shipped together, and neither is visible from a pure helper:
 *
 *  1. Each menu owned its own `show…` boolean and no toggle cleared the others,
 *     so opening the subtitle menu on top of the audio menu left two panels
 *     overlapping in the same corner — the newer one covering rows of the
 *     older one, both still live.
 *
 *  2. Each panel was `absolute right-0` against *its own icon button*, which
 *     sits mid-row. A 200–220 px panel hung off the left edge of a portrait
 *     phone, so half the tracks could not be read or tapped.
 *
 * Both are properties of the composition, so these tests drive the real
 * markup: click the toggles, then assert what a viewer would see.
 */

import { describe, it, expect, vi, beforeEach } from "vitest";
import { render, fireEvent } from "@testing-library/svelte";
import { tick } from "svelte";
import { invoke } from "@tauri-apps/api/core";
import VideoPlayer from "./VideoPlayer.svelte";

function testSelection() {
  return {
    url: "http://x/master.m3u8",
    transport: { type: "hls" },
    playbackKind: { type: "transcode" },
    rendition: null,
    available: [
      {
        quality: "original",
        label: "Original",
        detail: "Source",
        exceedsSource: false,
        sourceBitrate: 8_000_000,
      },
      {
        quality: "high",
        label: "8 Mbps",
        detail: "1080p",
        exceedsSource: false,
        sourceBitrate: 8_000_000,
      },
    ],
    mediaSourceId: null,
    playSessionId: null,
    needsTranscoding: true,
  } as unknown as import("$lib/api/bindings").StreamSelection;
}

vi.mock("$app/navigation", () => ({ goto: vi.fn() }));

vi.mock("$lib/player", () => ({
  playerController: {
    toggle: vi.fn(() => Promise.resolve()),
    seekVideo: vi.fn(() => Promise.resolve()),
    seek: vi.fn(() => Promise.resolve()),
    setActiveAdapter: vi.fn(),
    clearActiveAdapter: vi.fn(),
    getActiveAdapter: vi.fn(() => null),
    switchAudioTrack: vi.fn(() => Promise.resolve()),
    setStreamQuality: vi.fn(() => Promise.resolve(null)),
  },
}));

vi.mock("$lib/player/adapters/rustReportHost", () => ({
  createRustReportHost: () => ({
    onState: vi.fn(),
    onPosition: vi.fn(),
    onMediaLoaded: vi.fn(),
    onEnded: vi.fn(),
    onError: vi.fn(),
    onStreamUrlChanged: vi.fn(),
    onBuffering: vi.fn(),
    onReady: vi.fn(),
  }),
}));

vi.mock("$lib/player/html5Adapter", () => ({
  reportState: vi.fn(),
  reportPosition: vi.fn(),
  reportMediaLoaded: vi.fn(),
  resetReporting: vi.fn(),
}));

vi.mock("$lib/utils/pictureInPicture", () => ({
  isPipSupported: () => false,
  enterPip: vi.fn(),
  setAutoEnterEnabled: vi.fn(),
  setHtml5VideoState: vi.fn(),
}));

vi.mock("$lib/stores/auth", () => ({
  auth: {
    getUserId: () => "user-1",
    getRepository: () => ({ getHandle: () => "h", jrayActorsAt: async () => [] }),
    subscribe: (fn: (v: unknown) => void) => {
      fn({ isAuthenticated: true });
      return () => {};
    },
  },
}));

/** Two audio tracks and one subtitle track — enough for all three menus. */
const MEDIA = {
  id: "item-1",
  name: "Test Episode",
  type: "Episode",
  runTimeTicks: 6_000_000_000,
  durationMs: 600_000,
  mediaStreams: [
    { index: 1, kind: "audio", displayTitle: "English AAC", language: "eng", isDefault: true },
    { index: 2, kind: "audio", displayTitle: "Commentary", language: "eng" },
    {
      index: 3,
      kind: "subtitle",
      displayTitle: "English SRT",
      language: "eng",
      codec: "srt",
      deliverableAsSidecar: true,
    },
  ],
} as any;

function renderPlayer() {
  return render(VideoPlayer, {
    props: { media: MEDIA, selection: testSelection(), onClose: vi.fn() },
  });
}

/** The menu panels currently on screen, found by their headings. */
function openPanels(container: HTMLElement): string[] {
  return ["Audio Track", "Quality", "Subtitles"].filter((heading) =>
    [...container.querySelectorAll("div")].some(
      (el) => el.children.length === 0 && el.textContent?.trim() === heading,
    ),
  );
}

function clickToggle(container: HTMLElement, label: string) {
  const button = container.querySelector<HTMLButtonElement>(`button[aria-label="${label}"]`);
  expect(button, `expected a "${label}" button in the controls`).toBeTruthy();
  return fireEvent.click(button!);
}

describe("VideoPlayer track menus", () => {
  beforeEach(() => {
    vi.clearAllMocks();
    vi.mocked(invoke).mockImplementation(async (cmd: string) => {
      switch (cmd) {
        case "player_get_streaming_qualities":
          return [];
        case "player_get_video_settings":
          return { streamingQuality: "original" };
        default:
          return undefined;
      }
    });
  });

  // UT-227
  it("opening one menu closes any other — never two panels stacked in the corner", async () => {
    const { container } = renderPlayer();
    await tick();

    await clickToggle(container, "Select audio track");
    await tick();
    expect(openPanels(container)).toEqual(["Audio Track"]);

    await clickToggle(container, "Select subtitles");
    await tick();
    expect(openPanels(container)).toEqual(["Subtitles"]);

    await clickToggle(container, "Select streaming quality");
    await tick();
    expect(openPanels(container)).toEqual(["Quality"]);

    // A second click on the open menu's own toggle closes it.
    await clickToggle(container, "Select streaming quality");
    await tick();
    expect(openPanels(container)).toEqual([]);
  });

  // UT-227
  it("the volume slider is part of the same group — it closes an open track menu", async () => {
    const { container } = renderPlayer();
    await tick();

    await clickToggle(container, "Select subtitles");
    await tick();
    expect(openPanels(container)).toEqual(["Subtitles"]);

    // The volume popup (desktop only) is a menu of this bar too.
    const volume = container.querySelector<HTMLButtonElement>('button[title="Volume"]');
    expect(volume).toBeTruthy();
    await fireEvent.click(volume!);
    await tick();

    expect(container.querySelector("[aria-label='Volume controls']")).toBeTruthy();
    expect(openPanels(container)).toEqual([]);

    // …and a track menu closes the volume popup again.
    await clickToggle(container, "Select subtitles");
    await tick();
    expect(container.querySelector("[aria-label='Volume controls']")).toBeNull();
    expect(openPanels(container)).toEqual(["Subtitles"]);
  });

  // UT-228
  it("the open panel is anchored to the control bar and clamped to the viewport", async () => {
    const { container } = renderPlayer();
    await tick();

    for (const label of ["Select audio track", "Select subtitles", "Select streaming quality"]) {
      await clickToggle(container, label);
      await tick();

      const panel = container.querySelector<HTMLElement>("[data-testid='player-menu']");
      expect(panel, `${label} should open the shared menu panel`).toBeTruthy();

      // Anchored to the control row, not to the icon button: a panel anchored
      // to a mid-row button runs off the left edge in portrait.
      const toggle = container.querySelector<HTMLElement>(`button[aria-label="${label}"]`);
      expect(panel!.contains(toggle!)).toBe(false);
      expect(toggle!.parentElement!.contains(panel!)).toBe(false);

      // …and never wider than the screen it opens on.
      expect(panel!.className).toMatch(/max-w-\[|w-\[min\(/);

      await clickToggle(container, label);
      await tick();
    }
  });
});