import { describe, expect, test } from "bun:test";

import {
  parseSidebarCollapsed,
  readSidebarCollapsed,
  SIDEBAR_COLLAPSED_STORAGE_KEY,
  writeSidebarCollapsed,
} from "../../../src/web/hooks/use-sidebar-collapsed";

function createStorage(initial?: string): Storage {
  const values = new Map<string, string>();
  if (initial !== undefined) values.set(SIDEBAR_COLLAPSED_STORAGE_KEY, initial);
  return {
    clear: () => values.clear(),
    getItem: (key) => values.get(key) ?? null,
    key: (index) => Array.from(values.keys())[index] ?? null,
    get length() {
      return values.size;
    },
    removeItem: (key) => values.delete(key),
    setItem: (key, value) => values.set(key, value),
  };
}

describe("sidebar collapsed 纯逻辑", () => {
  test("仅字符串 true 解析为折叠", () => {
    expect(parseSidebarCollapsed("true")).toBe(true);
    expect(parseSidebarCollapsed("false")).toBe(false);
    expect(parseSidebarCollapsed(true)).toBe(false);
    expect(parseSidebarCollapsed(null)).toBe(false);
  });

  test("读取和写入 localStorage", () => {
    const storage = createStorage("true");
    expect(readSidebarCollapsed(storage)).toBe(true);

    writeSidebarCollapsed(false, storage);
    expect(storage.getItem(SIDEBAR_COLLAPSED_STORAGE_KEY)).toBe("false");
  });

  test("storage 异常时回退且不抛错", () => {
    const brokenStorage = {
      getItem: () => {
        throw new Error("blocked");
      },
      setItem: () => {
        throw new Error("blocked");
      },
    } as unknown as Storage;

    expect(readSidebarCollapsed(brokenStorage)).toBe(false);
    expect(() => writeSidebarCollapsed(true, brokenStorage)).not.toThrow();
  });
});