// hls.js empties the cues of every text track on the <video> when a manifest loads or the media
// attaches — the Plex player's own subtitle <track> included, so a VTT that loaded first showed
// nothing for the rest of the session. Its subtitle and caption controllers are not built at all.
import { describe, expect, it, vi } from "vitest";

const built: Record<string, unknown>[] = [];
vi.mock("hls.js", () => {
  class FakeHls {
    static isSupported = () => true;
    static Events = {};
    static ErrorTypes = {};
    constructor(config: Record<string, unknown>) {
      built.push(config);
    }
    on() {}
  }
  return { default: FakeHls };
});

const { createHlsPort } = await import("./hlsPort");

describe("createHlsPort", () => {
  it("builds hls.js without the controllers that clear every text track's cues", () => {
    const noop = () => {};
    createHlsPort({
      onManifestParsed: noop,
      onAudioTracksUpdated: noop,
      onFragLoaded: noop,
      onError: noop,
    });
    const config = built[0] ?? {};
    for (const key of [
      "subtitleTrackController",
      "subtitleStreamController",
      "timelineController",
    ]) {
      // Set, as undefined: hls.js spreads the config over its defaults, so an absent key keeps them.
      expect(key in config).toBe(true);
      expect(config[key]).toBeUndefined();
    }
  });
});