import { describe, it, expect, vi, beforeEach } from "vitest";
import { Cache } from "../src/lib/cache";

describe("Cache", () => {
  let cache: Cache<string>;

  beforeEach(() => {
    vi.useFakeTimers();
    cache = new Cache(1000);
  });

  it("should store and retrieve values", () => {
    cache.set("key1", "value1");
    expect(cache.get("key1")).toBe("value1");
  });

  it("should return null for missing keys", () => {
    expect(cache.get("nonexistent")).toBeNull();
  });

  it("should expire entries after TTL", () => {
    cache.set("key1", "value1");
    vi.advanceTimersByTime(1500);
    expect(cache.get("key1")).toBeNull();
  });

  it("should not expire entries before TTL", () => {
    cache.set("key1", "value1");
    vi.advanceTimersByTime(500);
    expect(cache.get("key1")).toBe("value1");
  });

  it("should delete entries", () => {
    cache.set("key1", "value1");
    cache.delete("key1");
    expect(cache.get("key1")).toBeNull();
  });

  it("should clear all entries", () => {
    cache.set("key1", "value1");
    cache.set("key2", "value2");
    cache.clear();
    expect(cache.get("key1")).toBeNull();
    expect(cache.get("key2")).toBeNull();
  });

  it("should not return expired entries when they are cleaned up on get", () => {
    cache.set("key1", "value1");
    vi.advanceTimersByTime(1001);
    const result = cache.get("key1");
    expect(result).toBeNull();
  });
});