/*
Copyright 2026 Lotus Guild

SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial
Please see LICENSE in the repository root for full details.
*/

import { beforeEach, describe, expect, it } from "vitest";

import {
  MAX_REMEMBERED,
  getRememberedVolume,
  rememberVolume,
} from "./lotusVolumeMemory";

describe("lotusVolumeMemory", () => {
  beforeEach(() => localStorage.clear());

  it("defaults to 1 and remembers a set volume", () => {
    expect(getRememberedVolume("@bob:x")).toBe(1);
    rememberVolume("@bob:x", 0.4);
    expect(getRememberedVolume("@bob:x")).toBe(0.4);
  });

  it("forgets the entry when set back to 1", () => {
    rememberVolume("@bob:x", 0.4);
    rememberVolume("@bob:x", 1);
    expect(getRememberedVolume("@bob:x")).toBe(1);
    expect(localStorage.getItem("lotus-per-user-volume")).toBe("{}");
  });

  it("keeps only the most recently set entries", () => {
    for (let i = 0; i < MAX_REMEMBERED + 5; i++) rememberVolume(`@u${i}:x`, 0.5);
    expect(getRememberedVolume("@u0:x")).toBe(1);
    expect(getRememberedVolume("@u4:x")).toBe(1);
    expect(getRememberedVolume("@u5:x")).toBe(0.5);
    expect(getRememberedVolume(`@u${MAX_REMEMBERED + 4}:x`)).toBe(0.5);
  });

  it("re-setting an old entry makes it recent", () => {
    for (let i = 0; i < MAX_REMEMBERED; i++) rememberVolume(`@u${i}:x`, 0.5);
    rememberVolume("@u0:x", 0.7);
    rememberVolume("@new:x", 0.3);
    expect(getRememberedVolume("@u0:x")).toBe(0.7);
    expect(getRememberedVolume("@u1:x")).toBe(1);
  });

  it("ignores junk in storage and invalid volumes", () => {
    localStorage.setItem(
      "lotus-per-user-volume",
      JSON.stringify({ "@a:x": "loud", "@b:x": 0.2 }),
    );
    expect(getRememberedVolume("@a:x")).toBe(1);
    expect(getRememberedVolume("@b:x")).toBe(0.2);
    rememberVolume("@c:x", Number.NaN);
    expect(getRememberedVolume("@c:x")).toBe(1);
    localStorage.setItem("lotus-per-user-volume", "not json");
    expect(getRememberedVolume("@b:x")).toBe(1);
  });
});