import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
import { cacheService } from "@/components/MemoEditor/services/cacheService";

describe("memo editor cache", () => {
  beforeEach(() => {
    const storage = new Map<string, string>();
    vi.stubGlobal("localStorage", {
      getItem: vi.fn((key: string) => storage.get(key) ?? null),
      setItem: vi.fn((key: string, value: string) => storage.set(key, value)),
      removeItem: vi.fn((key: string) => storage.delete(key)),
    });
    cacheService.clearAll();
  });

  afterEach(() => {
    vi.unstubAllGlobals();
  });

  it("stores draft content", () => {
    const key = cacheService.key("users/steven", "home-memo-editor");

    cacheService.saveNow(key, "- [x] Draft task");

    expect(cacheService.load(key)).toBe("- [x] Draft task");
  });

  it("removes empty draft content instead of caching it", () => {
    const key = cacheService.key("users/steven", "home-memo-editor");

    cacheService.saveNow(key, "");

    expect(cacheService.load(key)).toBe("");
  });

  it("loads content from previously structured draft entries", () => {
    const key = cacheService.key("users/steven", "home-memo-editor");
    localStorage.setItem(key, JSON.stringify({ kind: "memos.editor-cache", version: 1, content: "- [ ] migrated task" }));

    expect(cacheService.load(key)).toBe("- [ ] migrated task");
  });

  it("keeps raw JSON markdown drafts intact", () => {
    const key = cacheService.key("users/steven", "home-memo-editor");
    const jsonDraft = '{"content":"not a cache envelope"}';
    localStorage.setItem(key, jsonDraft);

    expect(cacheService.load(key)).toBe(jsonDraft);
  });

  it("keeps structured-looking drafts without a supported version intact", () => {
    const key = cacheService.key("users/steven", "home-memo-editor");
    const jsonDraft = JSON.stringify({ kind: "memos.editor-cache", content: "not a supported envelope" });
    localStorage.setItem(key, jsonDraft);

    expect(cacheService.load(key)).toBe(jsonDraft);
  });
});