// Which credits block ends an item, and what skipping each marker does. An item can carry several
// credits blocks — mid- and post-credit scenes play between them — and only the last one may move
// on to the next item; only the one Plex itself flags as the end may do so on its own.
import { describe, it, expect } from "vitest";

import type { PlexMarker } from "./api";
import { markerSkip } from "./plexMarkers";

const credits = (start_s: number, end_s: number, final = false): PlexMarker => ({
  type: "credits",
  start_s,
  end_s,
  final,
});
const intro: PlexMarker = { type: "intro", start_s: 10, end_s: 60, final: false };

describe("markerSkip", () => {
  it("an intro jumps to its end, on its own when the viewer wants that", () => {
    expect(markerSkip(intro, [intro])).toEqual({ leaves: false, auto: true });
  });

  it("only the credits Plex flags final leave the item, and only they may do it on their own", () => {
    const first = credits(6811, 6831);
    const middle = credits(7039, 7507);
    const end = credits(7549, 7559, true);
    const all = [intro, first, middle, end];
    expect(markerSkip(first, all)).toEqual({ leaves: false, auto: false });
    expect(markerSkip(middle, all)).toEqual({ leaves: false, auto: false });
    expect(markerSkip(end, all)).toEqual({ leaves: true, auto: true });
  });

  it("with no credits flagged final the last one is the end, but leaves only when asked", () => {
    const first = credits(2000, 2100);
    const last = credits(2900, 2995);
    // listed out of order on purpose: "last" is by time, not by position in the list
    expect(markerSkip(last, [last, first])).toEqual({ leaves: true, auto: false });
    expect(markerSkip(first, [last, first])).toEqual({ leaves: false, auto: false });
    expect(markerSkip(last, [last])).toEqual({ leaves: true, auto: false });
  });

  it("a final flag on an earlier block wins over a later block", () => {
    const end = credits(2000, 2100, true);
    const later = credits(2900, 2995);
    expect(markerSkip(end, [end, later])).toEqual({ leaves: true, auto: true });
    expect(markerSkip(later, [end, later])).toEqual({ leaves: false, auto: false });
  });
});