import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
import { readMigrated } from "./legacyStorage";

describe("readMigrated", () => {
  beforeEach(() => localStorage.clear());
  afterEach(() => vi.restoreAllMocks());

  it("переносит старый ключ jira-hub-* в sdlc-hub-*", () => {
    localStorage.setItem("jira-hub-token", "abc");
    expect(readMigrated("sdlc-hub-token")).toBe("abc");
    expect(localStorage.getItem("sdlc-hub-token")).toBe("abc");
    expect(localStorage.getItem("jira-hub-token")).toBeNull();
  });

  it("при наличии обоих возвращает новое и не трогает старое", () => {
    localStorage.setItem("jira-hub-token", "old");
    localStorage.setItem("sdlc-hub-token", "new");
    expect(readMigrated("sdlc-hub-token")).toBe("new");
    expect(localStorage.getItem("jira-hub-token")).toBe("old");
  });

  it("без обоих ключей возвращает null и ничего не пишет", () => {
    expect(readMigrated("sdlc-hub-token")).toBeNull();
    expect(localStorage.length).toBe(0);
  });

  it("исключение хранилища даёт null", () => {
    vi.spyOn(Storage.prototype, "getItem").mockImplementation(() => { throw new Error("closed"); });
    expect(readMigrated("sdlc-hub-token")).toBeNull();
  });

  it("бросающий setItem при переносе: значение всё равно возвращается", () => {
    localStorage.setItem("jira-hub-token", "abc");
    vi.spyOn(Storage.prototype, "setItem").mockImplementation(() => { throw new Error("quota"); });
    expect(readMigrated("sdlc-hub-token")).toBe("abc");
  });

  it("бросающий removeItem при переносе: значение всё равно возвращается", () => {
    localStorage.setItem("jira-hub-token", "abc");
    vi.spyOn(Storage.prototype, "removeItem").mockImplementation(() => { throw new Error("closed"); });
    expect(readMigrated("sdlc-hub-token")).toBe("abc");
  });
});