import type { MockInstance } from "vitest";
import { describe, beforeEach, afterEach, it, expect, vi } from "vitest";
import type { IIndexSegment } from "../index_helpers";
import type IUpdateSegmentTimeline from "../update_segment_timeline";

describe("Manifest Parsers utils - updateSegmentTimeline", () => {
  let mockLogWarn: MockInstance | undefined;
  let updateSegmentTimeline:
    | ((a: IIndexSegment[], b: IIndexSegment[]) => boolean)
    | undefined;
  beforeEach(async () => {
    vi.resetModules();

    mockLogWarn = vi.fn();
    vi.doMock("../../../../log", () => ({
      default: {
        warn: mockLogWarn,
      },
    }));
    updateSegmentTimeline = (await vi.importActual("../update_segment_timeline"))
      .default as typeof IUpdateSegmentTimeline;
  });

  afterEach(() => {
    vi.resetModules();
    vi.resetAllMocks();
  });

  it("should just replace with the new timeline if the old was empty", () => {
    const oldTimeline: IIndexSegment[] = [];
    const newTimeline1 = [{ start: 0, duration: 1000, repeatCount: 10 }];
    const newTimeline2: IIndexSegment[] = [];
    expect(updateSegmentTimeline?.(oldTimeline, newTimeline1)).toEqual(true);
    expect(oldTimeline).toEqual(newTimeline1);

    oldTimeline.length = 0; // reset
    updateSegmentTimeline?.(oldTimeline, newTimeline2);
    expect(oldTimeline).toEqual(newTimeline2);
    expect(mockLogWarn).not.toHaveBeenCalled();
  });

  it("should not do anything if the new timeline is empty", () => {
    const oldTimeline = [{ start: 0, duration: 1000, repeatCount: 10 }];
    const newTimeline: IIndexSegment[] = [];
    const oldTimelineCloned = oldTimeline.slice();
    expect(updateSegmentTimeline?.(oldTimeline, newTimeline)).toEqual(false);
    expect(oldTimeline).toEqual(oldTimelineCloned);
    expect(mockLogWarn).not.toHaveBeenCalled();
  });

  it("should not do anything if the timelines are equal", () => {
    const oldTimeline1 = [{ start: 0, duration: 1000, repeatCount: 10 }];
    const newTimeline1 = [{ start: 0, duration: 1000, repeatCount: 10 }];
    const oldTimeline1Cloned = oldTimeline1.slice();
    expect(updateSegmentTimeline?.(oldTimeline1, newTimeline1)).toEqual(false);
    expect(oldTimeline1).toEqual(oldTimeline1Cloned);

    const oldTimeline2 = [
      { start: 0, duration: 1000, repeatCount: 10 },
      { start: 11000, duration: 1000, repeatCount: 0 },
      { start: 12000, duration: 1000, repeatCount: 1 },
    ];
    const newTimeline2 = [
      { start: 0, duration: 1000, repeatCount: 10 },
      { start: 11000, duration: 1000, repeatCount: 0 },
      { start: 12000, duration: 1000, repeatCount: 1 },
    ];
    const oldTimeline2Cloned = oldTimeline2.slice();
    expect(updateSegmentTimeline?.(oldTimeline2, newTimeline2)).toEqual(false);
    expect(oldTimeline2).toEqual(oldTimeline2Cloned);
    expect(mockLogWarn).not.toHaveBeenCalled();
  });

  it("should throw if the new timeline begin long after the old one", () => {
    const oldTimeline1 = [
      { start: 0, duration: 1000, repeatCount: 10 },
      { start: 11000, duration: 1000, repeatCount: 0 },
    ];
    const newTimeline1 = [
      { start: 13000, duration: 1000, repeatCount: 10 },
      { start: 24000, duration: 1000, repeatCount: 0 },
      { start: 25000, duration: 1000, repeatCount: 1 },
    ];
    const oldTimeline1Cloned = oldTimeline1.slice();

    let err: unknown = null;
    try {
      expect(updateSegmentTimeline?.(oldTimeline1, newTimeline1)).not.toHaveReturned();
    } catch (e) {
      err = e;
    }

    expect(err).toBeInstanceOf(Error);

    // Impossible check to shut-up TypeScript
    if (!(err instanceof Error)) {
      throw new Error("Impossible: already checked it was an Error instance");
    }
    expect((err as { type?: string }).type).toEqual("MEDIA_ERROR");
    expect((err as { code?: string }).code).toEqual("MANIFEST_UPDATE_ERROR");
    expect(err.message).toEqual(
      "MANIFEST_UPDATE_ERROR: Cannot perform partial update: not enough data",
    );
    expect(oldTimeline1).toEqual(oldTimeline1Cloned);
    expect(mockLogWarn).not.toHaveBeenCalled();
  });

  it("should merge consecutive timelines", () => {
    const oldTimeline1 = [
      { start: 0, duration: 500, repeatCount: 20 },
      { start: 11000, duration: 1000, repeatCount: 0 },
    ];
    const newTimeline1 = [
      { start: 12000, duration: 1000, repeatCount: 11 },
      { start: 24000, duration: 1100, repeatCount: 0 },
      { start: 25100, duration: 1000, repeatCount: 1 },
    ];
    const oldTimeline1Cloned = oldTimeline1.slice();
    const newTimeline1Cloned = newTimeline1.slice();
    expect(updateSegmentTimeline?.(oldTimeline1, newTimeline1)).toEqual(false);
    expect(oldTimeline1).toEqual([...oldTimeline1Cloned, ...newTimeline1Cloned]);
    expect(mockLogWarn).not.toHaveBeenCalled();

    // With repeats

    const oldTimeline2 = [
      { start: 0, duration: 500, repeatCount: 20 },
      { start: 11000, duration: 1000, repeatCount: 8 },
    ];
    const newTimeline2 = [
      { start: 20000, duration: 1000, repeatCount: 3 },
      { start: 24000, duration: 1100, repeatCount: 0 },
      { start: 25100, duration: 1000, repeatCount: 1 },
    ];
    const oldTimeline2Cloned = oldTimeline2.slice();
    const newTimeline2Cloned = newTimeline2.slice();
    expect(updateSegmentTimeline?.(oldTimeline2, newTimeline2)).toEqual(false);
    expect(oldTimeline2).toEqual([...oldTimeline2Cloned, ...newTimeline2Cloned]);
    expect(mockLogWarn).not.toHaveBeenCalled();
  });

  it("should merge consecutive timelines with a repeatCount set to -1 for the old timeline", () => {
    const oldTimeline1 = [
      { start: 0, duration: 500, repeatCount: 20 },
      { start: 11000, duration: 1000, repeatCount: -1 },
    ];
    const newTimeline1 = [
      { start: 12000, duration: 1000, repeatCount: 11 },
      { start: 24000, duration: 1100, repeatCount: 0 },
      { start: 25100, duration: 1000, repeatCount: 1 },
    ];
    expect(updateSegmentTimeline?.(oldTimeline1, newTimeline1)).toEqual(false);
    expect(oldTimeline1).toEqual([
      { start: 0, duration: 500, repeatCount: 20 },
      { start: 11000, duration: 1000, repeatCount: 0 },
      { start: 12000, duration: 1000, repeatCount: 11 },
      { start: 24000, duration: 1100, repeatCount: 0 },
      { start: 25100, duration: 1000, repeatCount: 1 },
    ]);

    const oldTimeline2 = [
      { start: 0, duration: 500, repeatCount: 20 },
      { start: 11000, duration: 1000, repeatCount: -1 },
    ];
    const newTimeline2 = [
      { start: 20000, duration: 1000, repeatCount: 3 },
      { start: 24000, duration: 1100, repeatCount: 0 },
      { start: 25100, duration: 1000, repeatCount: 1 },
    ];
    expect(updateSegmentTimeline?.(oldTimeline2, newTimeline2)).toEqual(false);
    expect(oldTimeline2).toEqual([
      { start: 0, duration: 500, repeatCount: 20 },
      { start: 11000, duration: 1000, repeatCount: 8 },
      { start: 20000, duration: 1000, repeatCount: 3 },
      { start: 24000, duration: 1100, repeatCount: 0 },
      { start: 25100, duration: 1000, repeatCount: 1 },
    ]);
    expect(mockLogWarn).not.toHaveBeenCalled();
  });

  it("should merge perfectly overlapping timelines without repeatCounts", () => {
    const oldTimeline1 = [
      { start: 0, duration: 1000, repeatCount: 0 },
      { start: 1000, duration: 500, repeatCount: 0 },
      { start: 1500, duration: 1000, repeatCount: 0 },
    ];
    const newTimeline1 = [
      { start: 1000, duration: 500, repeatCount: 0 },
      { start: 1500, duration: 1000, repeatCount: 0 },
      { start: 2500, duration: 500, repeatCount: 0 },
      { start: 3000, duration: 5000, repeatCount: 0 },
    ];
    expect(updateSegmentTimeline?.(oldTimeline1, newTimeline1)).toEqual(false);
    expect(oldTimeline1).toEqual([
      { start: 0, duration: 1000, repeatCount: 0 },
      { start: 1000, duration: 500, repeatCount: 0 },
      { start: 1500, duration: 1000, repeatCount: 0 },
      { start: 2500, duration: 500, repeatCount: 0 },
      { start: 3000, duration: 5000, repeatCount: 0 },
    ]);
    expect(mockLogWarn).not.toHaveBeenCalled();
  });

  it("should merge perfectly overlapping timelines with repeatCounts", () => {
    const oldTimeline1 = [
      { start: 0, duration: 1000, repeatCount: 0 },
      { start: 1000, duration: 500, repeatCount: 21 },
      { start: 12000, duration: 1000, repeatCount: 0 },
    ];
    const newTimeline1 = [
      { start: 2000, duration: 500, repeatCount: 19 },
      { start: 12000, duration: 1000, repeatCount: 0 },
      { start: 13000, duration: 7000, repeatCount: 0 },
      { start: 20000, duration: 5000, repeatCount: 0 },
    ];
    expect(updateSegmentTimeline?.(oldTimeline1, newTimeline1)).toEqual(false);
    expect(oldTimeline1).toEqual([
      { start: 0, duration: 1000, repeatCount: 0 },
      { start: 1000, duration: 500, repeatCount: 21 },
      { start: 12000, duration: 1000, repeatCount: 0 },
      { start: 13000, duration: 7000, repeatCount: 0 },
      { start: 20000, duration: 5000, repeatCount: 0 },
    ]);
    expect(mockLogWarn).not.toHaveBeenCalled();

    const oldTimeline2 = [
      { start: 1000, duration: 500, repeatCount: 21 },
      { start: 12000, duration: 1000, repeatCount: 0 },
    ];
    const newTimeline2 = [
      { start: 2000, duration: 500, repeatCount: 19 },
      { start: 12000, duration: 1000, repeatCount: 0 },
      { start: 13000, duration: 7000, repeatCount: 0 },
      { start: 20000, duration: 5000, repeatCount: 0 },
    ];
    expect(updateSegmentTimeline?.(oldTimeline2, newTimeline2)).toEqual(false);
    expect(oldTimeline2).toEqual([
      { start: 1000, duration: 500, repeatCount: 21 },
      { start: 12000, duration: 1000, repeatCount: 0 },
      { start: 13000, duration: 7000, repeatCount: 0 },
      { start: 20000, duration: 5000, repeatCount: 0 },
    ]);

    const oldTimeline3 = [
      { start: 1000, duration: 500, repeatCount: 21 },
      { start: 12000, duration: 1000, repeatCount: 0 },
    ];
    const newTimeline3 = [
      { start: 2000, duration: 500, repeatCount: -1 },
      { start: 12000, duration: 1000, repeatCount: 0 },
      { start: 13000, duration: 7000, repeatCount: 0 },
      { start: 20000, duration: 5000, repeatCount: 0 },
    ];
    expect(updateSegmentTimeline?.(oldTimeline3, newTimeline3)).toEqual(false);
    expect(oldTimeline3).toEqual([
      { start: 1000, duration: 500, repeatCount: -1 },
      { start: 12000, duration: 1000, repeatCount: 0 },
      { start: 13000, duration: 7000, repeatCount: 0 },
      { start: 20000, duration: 5000, repeatCount: 0 },
    ]);
    expect(mockLogWarn).not.toHaveBeenCalled();
  });

  it('should merge even if there are "holes" in the old timeline', () => {
    const oldTimeline1 = [
      { start: 0, duration: 1000, repeatCount: 0 },
      { start: 1000, duration: 500, repeatCount: 0 },
      { start: 12000, duration: 1000, repeatCount: 0 },
    ];
    const newTimeline1 = [
      { start: 2000, duration: 500, repeatCount: 19 },
      { start: 12000, duration: 1000, repeatCount: 0 },
      { start: 13000, duration: 7000, repeatCount: 0 },
      { start: 20000, duration: 5000, repeatCount: 0 },
    ];
    expect(updateSegmentTimeline?.(oldTimeline1, newTimeline1)).toEqual(false);
    expect(oldTimeline1).toEqual([
      { start: 0, duration: 1000, repeatCount: 0 },
      { start: 1000, duration: 500, repeatCount: 0 },
      { start: 2000, duration: 500, repeatCount: 19 },
      { start: 12000, duration: 1000, repeatCount: 0 },
      { start: 13000, duration: 7000, repeatCount: 0 },
      { start: 20000, duration: 5000, repeatCount: 0 },
    ]);

    const oldTimeline2 = [
      { start: 0, duration: 1000, repeatCount: 0 },
      { start: 1000, duration: 500, repeatCount: 3 },
      { start: 12000, duration: 1000, repeatCount: 0 },
    ];
    const newTimeline2 = [
      { start: 4000, duration: 500, repeatCount: 15 },
      { start: 12000, duration: 1000, repeatCount: 0 },
      { start: 13000, duration: 7000, repeatCount: 0 },
      { start: 20000, duration: 5000, repeatCount: 0 },
    ];
    expect(updateSegmentTimeline?.(oldTimeline2, newTimeline2)).toEqual(false);
    expect(oldTimeline2).toEqual([
      { start: 0, duration: 1000, repeatCount: 0 },
      { start: 1000, duration: 500, repeatCount: 3 },
      { start: 4000, duration: 500, repeatCount: 15 },
      { start: 12000, duration: 1000, repeatCount: 0 },
      { start: 13000, duration: 7000, repeatCount: 0 },
      { start: 20000, duration: 5000, repeatCount: 0 },
    ]);

    expect(mockLogWarn).not.toHaveBeenCalled();
  });

  it("should handle cases where the new timeline's start cannot be reached with the old timeline's repeatCount ", () => {
    const oldTimeline1 = [
      { start: 0, duration: 1000, repeatCount: 0 },
      { start: 1000, duration: 500, repeatCount: 21 },
      { start: 12000, duration: 1000, repeatCount: 0 },
    ];
    const newTimeline1 = [
      { start: 2700, duration: 500, repeatCount: 19 },
      { start: 12700, duration: 1000, repeatCount: 0 },
      { start: 13700, duration: 7000, repeatCount: 0 },
      { start: 20700, duration: 5000, repeatCount: 0 },
    ];
    expect(updateSegmentTimeline?.(oldTimeline1, newTimeline1)).toEqual(false);
    expect(oldTimeline1).toEqual([
      { start: 0, duration: 1000, repeatCount: 0 },
      { start: 1000, duration: 500, repeatCount: 2 },
      { start: 2700, duration: 500, repeatCount: 19 },
      { start: 12700, duration: 1000, repeatCount: 0 },
      { start: 13700, duration: 7000, repeatCount: 0 },
      { start: 20700, duration: 5000, repeatCount: 0 },
    ]);
    expect(mockLogWarn).toHaveBeenCalledTimes(1);
    expect(mockLogWarn).toHaveBeenCalledWith(
      "RepresentationIndex: Manifest update removed previous segments",
    );
    mockLogWarn?.mockClear();

    const oldTimeline2 = [
      { start: 0, duration: 1000, repeatCount: 0 },
      { start: 1000, duration: 500, repeatCount: 21 },
    ];
    const newTimeline2 = [
      { start: 2700, duration: 500, repeatCount: 19 },
      { start: 12700, duration: 1000, repeatCount: 0 },
      { start: 13700, duration: 7000, repeatCount: 0 },
      { start: 20700, duration: 5000, repeatCount: 0 },
    ];
    expect(updateSegmentTimeline?.(oldTimeline2, newTimeline2)).toEqual(false);
    expect(oldTimeline2).toEqual([
      { start: 0, duration: 1000, repeatCount: 0 },
      { start: 1000, duration: 500, repeatCount: 2 },
      { start: 2700, duration: 500, repeatCount: 19 },
      { start: 12700, duration: 1000, repeatCount: 0 },
      { start: 13700, duration: 7000, repeatCount: 0 },
      { start: 20700, duration: 5000, repeatCount: 0 },
    ]);
    expect(mockLogWarn).toHaveBeenCalledTimes(1);
    expect(mockLogWarn).toHaveBeenCalledWith(
      "RepresentationIndex: Manifest update removed previous segments",
    );
    mockLogWarn?.mockClear();

    const oldTimeline3 = [
      { start: 0, duration: 1000, repeatCount: 0 },
      { start: 1000, duration: 500, repeatCount: 21 },
    ];
    const newTimeline3 = [{ start: 2700, duration: 500, repeatCount: 19 }];
    expect(updateSegmentTimeline?.(oldTimeline3, newTimeline3)).toEqual(false);
    expect(oldTimeline3).toEqual([
      { start: 0, duration: 1000, repeatCount: 0 },
      { start: 1000, duration: 500, repeatCount: 2 },
      { start: 2700, duration: 500, repeatCount: 19 },
    ]);
    expect(mockLogWarn).toHaveBeenCalledTimes(1);
    expect(mockLogWarn).toHaveBeenCalledWith(
      "RepresentationIndex: Manifest update removed previous segments",
    );
  });

  it("should handle cases where the repeatCount cannot be incremented due to different durations", () => {
    const oldTimeline1 = [
      { start: 0, duration: 1000, repeatCount: 0 },
      { start: 1000, duration: 500, repeatCount: 21 },
      { start: 12000, duration: 1000, repeatCount: 0 },
    ];
    const newTimeline1 = [
      { start: 2000, duration: 1000, repeatCount: 9 },
      { start: 12000, duration: 1000, repeatCount: 0 },
      { start: 13000, duration: 7000, repeatCount: 0 },
      { start: 20000, duration: 5000, repeatCount: 0 },
    ];
    expect(updateSegmentTimeline?.(oldTimeline1, newTimeline1)).toEqual(false);
    expect(oldTimeline1).toEqual([
      { start: 0, duration: 1000, repeatCount: 0 },
      { start: 1000, duration: 500, repeatCount: 1 },
      { start: 2000, duration: 1000, repeatCount: 9 },
      { start: 12000, duration: 1000, repeatCount: 0 },
      { start: 13000, duration: 7000, repeatCount: 0 },
      { start: 20000, duration: 5000, repeatCount: 0 },
    ]);
    expect(mockLogWarn).toHaveBeenCalledTimes(1);
    expect(mockLogWarn).toHaveBeenCalledWith(
      "RepresentationIndex: Manifest update removed previous segments",
    );
    mockLogWarn?.mockClear();

    const oldTimeline2 = [
      { start: 0, duration: 1000, repeatCount: 0 },
      { start: 1000, duration: 500, repeatCount: 21 },
    ];
    const newTimeline2 = [
      { start: 2000, duration: 1000, repeatCount: 9 },
      { start: 12000, duration: 1000, repeatCount: 0 },
      { start: 13000, duration: 7000, repeatCount: 0 },
      { start: 20000, duration: 5000, repeatCount: 0 },
    ];
    expect(updateSegmentTimeline?.(oldTimeline2, newTimeline2)).toEqual(false);
    expect(oldTimeline2).toEqual([
      { start: 0, duration: 1000, repeatCount: 0 },
      { start: 1000, duration: 500, repeatCount: 1 },
      { start: 2000, duration: 1000, repeatCount: 9 },
      { start: 12000, duration: 1000, repeatCount: 0 },
      { start: 13000, duration: 7000, repeatCount: 0 },
      { start: 20000, duration: 5000, repeatCount: 0 },
    ]);
    expect(mockLogWarn).toHaveBeenCalledTimes(1);
    expect(mockLogWarn).toHaveBeenCalledWith(
      "RepresentationIndex: Manifest update removed previous segments",
    );
    mockLogWarn?.mockClear();

    const oldTimeline3 = [{ start: 1000, duration: 500, repeatCount: 21 }];
    const newTimeline3 = [{ start: 2000, duration: 1000, repeatCount: 9 }];
    expect(updateSegmentTimeline?.(oldTimeline3, newTimeline3)).toEqual(false);
    expect(oldTimeline3).toEqual([
      { start: 1000, duration: 500, repeatCount: 1 },
      { start: 2000, duration: 1000, repeatCount: 9 },
    ]);
    expect(mockLogWarn).toHaveBeenCalledTimes(1);
    expect(mockLogWarn).toHaveBeenCalledWith(
      "RepresentationIndex: Manifest update removed previous segments",
    );
  });

  it("should handle and log when there is a direct overlap (not due to a repeat)", () => {
    const oldTimeline1 = [
      { start: 0, duration: 1000, repeatCount: 0 },
      { start: 1000, duration: 500, repeatCount: 0 },
      { start: 1500, duration: 1500, repeatCount: 0 },
      { start: 3000, duration: 9000, repeatCount: 0 },
    ];
    const newTimeline1 = [
      { start: 2000, duration: 1000, repeatCount: 0 },
      { start: 3000, duration: 9000, repeatCount: 0 },
      { start: 12000, duration: 1000, repeatCount: 0 },
      { start: 13000, duration: 7000, repeatCount: 0 },
      { start: 20000, duration: 5000, repeatCount: 0 },
    ];
    expect(updateSegmentTimeline?.(oldTimeline1, newTimeline1)).toEqual(true);
    expect(oldTimeline1).toEqual([
      { start: 2000, duration: 1000, repeatCount: 0 },
      { start: 3000, duration: 9000, repeatCount: 0 },
      { start: 12000, duration: 1000, repeatCount: 0 },
      { start: 13000, duration: 7000, repeatCount: 0 },
      { start: 20000, duration: 5000, repeatCount: 0 },
    ]);
    expect(mockLogWarn).toHaveBeenCalledTimes(1);
    expect(mockLogWarn).toHaveBeenCalledWith(
      "RepresentationIndex: Manifest update removed all previous segments",
    );
  });

  it("should handle the case where the new Timeline just increment the last repeatCount", () => {
    const oldTimeline1 = [
      { start: 0, duration: 1000, repeatCount: 0 },
      { start: 1000, duration: 500, repeatCount: 21 },
    ];
    const newTimeline1 = [{ start: 1000, duration: 500, repeatCount: 51 }];
    expect(updateSegmentTimeline?.(oldTimeline1, newTimeline1)).toEqual(false);
    expect(oldTimeline1).toEqual([
      { start: 0, duration: 1000, repeatCount: 0 },
      { start: 1000, duration: 500, repeatCount: 51 },
    ]);

    const oldTimeline2 = [{ start: 1000, duration: 500, repeatCount: 64 }];
    const newTimeline2 = [{ start: 1000, duration: 500, repeatCount: 72 }];
    expect(updateSegmentTimeline?.(oldTimeline2, newTimeline2)).toEqual(false);
    expect(oldTimeline2).toEqual([{ start: 1000, duration: 500, repeatCount: 72 }]);

    const oldTimeline3 = [{ start: 1000, duration: 500, repeatCount: 64 }];
    const newTimeline3 = [
      { start: 1000, duration: 500, repeatCount: 72 },
      { start: 37500, duration: 1000, repeatCount: 5 },
    ];
    expect(updateSegmentTimeline?.(oldTimeline3, newTimeline3)).toEqual(false);
    expect(oldTimeline3).toEqual([
      { start: 1000, duration: 500, repeatCount: 72 },
      { start: 37500, duration: 1000, repeatCount: 5 },
    ]);

    expect(mockLogWarn).not.toHaveBeenCalled();
  });

  it("should handle when the newer timeline has more depth than the older one", () => {
    const oldTimeline1 = [
      { start: 1000, duration: 500, repeatCount: 21 },
      { start: 12000, duration: 1000, repeatCount: 0 },
    ];
    const newTimeline1 = [
      { start: 0, duration: 1000, repeatCount: 0 },
      { start: 1000, duration: 500, repeatCount: 21 },
      { start: 12000, duration: 1000, repeatCount: 0 },
      { start: 13000, duration: 7000, repeatCount: 0 },
      { start: 20000, duration: 5000, repeatCount: 0 },
    ];
    expect(updateSegmentTimeline?.(oldTimeline1, newTimeline1)).toEqual(true);
    expect(oldTimeline1).toEqual([
      { start: 0, duration: 1000, repeatCount: 0 },
      { start: 1000, duration: 500, repeatCount: 21 },
      { start: 12000, duration: 1000, repeatCount: 0 },
      { start: 13000, duration: 7000, repeatCount: 0 },
      { start: 20000, duration: 5000, repeatCount: 0 },
    ]);

    expect(mockLogWarn).toHaveBeenCalledTimes(1);
    expect(mockLogWarn).toHaveBeenCalledWith(
      'RepresentationIndex: The new index is "bigger" than the previous one',
    );

    mockLogWarn?.mockClear();

    const oldTimeline2 = [
      { start: 1000, duration: 500, repeatCount: 21 },
      { start: 12000, duration: 1000, repeatCount: -1 },
    ];
    const newTimeline2 = [
      { start: 0, duration: 1000, repeatCount: 0 },
      { start: 1000, duration: 500, repeatCount: 21 },
      { start: 12000, duration: 1000, repeatCount: 0 },
      { start: 13000, duration: 7000, repeatCount: 0 },
      { start: 20000, duration: 5000, repeatCount: 0 },
    ];
    expect(updateSegmentTimeline?.(oldTimeline2, newTimeline2)).toEqual(true);
    expect(oldTimeline2).toEqual([
      { start: 0, duration: 1000, repeatCount: 0 },
      { start: 1000, duration: 500, repeatCount: 21 },
      { start: 12000, duration: 1000, repeatCount: 0 },
      { start: 13000, duration: 7000, repeatCount: 0 },
      { start: 20000, duration: 5000, repeatCount: 0 },
    ]);

    expect(mockLogWarn).toHaveBeenCalledTimes(1);
    expect(mockLogWarn).toHaveBeenCalledWith(
      'RepresentationIndex: The new index is "bigger" than the previous one',
    );
  });

  it("should handle when the newer timeline is actually older than the older one", () => {
    const oldTimeline1 = [
      { start: 1000, duration: 500, repeatCount: 21 },
      { start: 12000, duration: 1000, repeatCount: 0 },
      { start: 13000, duration: 7000, repeatCount: 0 },
      { start: 20000, duration: 5000, repeatCount: 0 },
    ];
    const newTimeline1 = [
      { start: 0, duration: 1000, repeatCount: 0 },
      { start: 1000, duration: 500, repeatCount: 21 },
    ];
    expect(updateSegmentTimeline?.(oldTimeline1, newTimeline1)).toEqual(false);
    expect(oldTimeline1).toEqual([
      { start: 1000, duration: 500, repeatCount: 21 },
      { start: 12000, duration: 1000, repeatCount: 0 },
      { start: 13000, duration: 7000, repeatCount: 0 },
      { start: 20000, duration: 5000, repeatCount: 0 },
    ]);

    expect(mockLogWarn).toHaveBeenCalledTimes(1);
    expect(mockLogWarn).toHaveBeenCalledWith(
      "RepresentationIndex: The new index is older than the previous one",
    );

    mockLogWarn?.mockClear();

    const oldTimeline2 = [
      { start: 1000, duration: 500, repeatCount: 21 },
      { start: 12000, duration: 1000, repeatCount: 0 },
      { start: 13000, duration: 7000, repeatCount: 0 },
      { start: 20000, duration: 5000, repeatCount: -1 },
    ];
    const newTimeline2 = [
      { start: 0, duration: 1000, repeatCount: 0 },
      { start: 1000, duration: 500, repeatCount: 21 },
    ];
    expect(updateSegmentTimeline?.(oldTimeline2, newTimeline2)).toEqual(false);
    expect(oldTimeline2).toEqual([
      { start: 1000, duration: 500, repeatCount: 21 },
      { start: 12000, duration: 1000, repeatCount: 0 },
      { start: 13000, duration: 7000, repeatCount: 0 },
      { start: 20000, duration: 5000, repeatCount: -1 },
    ]);

    expect(mockLogWarn).toHaveBeenCalledTimes(1);
    expect(mockLogWarn).toHaveBeenCalledWith(
      "RepresentationIndex: The new index is older than the previous one",
    );

    mockLogWarn?.mockClear();
  });
});