import { afterEach, expect, it, vi } from "vitest";
import { floatingWindowEntries, floatingWindowOrder, raiseFloatingWindow, registerFloatingWindow, removeFloatingWindow, subscribeFloatingWindows } from "./floating-window-layer";

afterEach(() => floatingWindowOrder().forEach(removeFloatingWindow));

it("keeps a stable snapshot, follows stacking order and removes window metadata", () => {
  const notify = vi.fn();
  const stop = subscribeFloatingWindows(notify);
  const first = { id: "first", title: "压力图", focus: vi.fn(), close: vi.fn() };
  registerFloatingWindow(first);
  const snapshot = floatingWindowEntries();
  expect(floatingWindowEntries()).toBe(snapshot);
  registerFloatingWindow({ id: "second", title: "流量图", focus: vi.fn(), close: vi.fn() });
  expect(floatingWindowEntries().map((entry) => entry.id)).toEqual(["first", "second"]);
  raiseFloatingWindow("first");
  expect(floatingWindowEntries().map((entry) => entry.id)).toEqual(["second", "first"]);
  removeFloatingWindow("first");
  expect(floatingWindowEntries().map((entry) => entry.id)).toEqual(["second"]);
  removeFloatingWindow("second");
  expect(floatingWindowEntries()).toEqual([]);
  expect(notify).toHaveBeenCalledTimes(5);
  stop();
});

it("updates titles without moving windows and calls the latest actions without snapshot churn", () => {
  const focus = vi.fn(), close = vi.fn();
  registerFloatingWindow({ id: "chart", title: "旧标题", focus: vi.fn(), close: vi.fn() });
  const initial = floatingWindowEntries();
  registerFloatingWindow({ id: "chart", title: "旧标题", focus, close });
  expect(floatingWindowEntries()).toBe(initial);
  initial[0].focus();
  initial[0].close();
  expect(focus).toHaveBeenCalledOnce();
  expect(close).toHaveBeenCalledOnce();
  registerFloatingWindow({ id: "chart", title: "新标题", focus, close });
  expect(floatingWindowEntries()[0].title).toBe("新标题");
  expect(initial[0].title).toBe("旧标题");
  expect(floatingWindowOrder()).toEqual(["chart"]);
  removeFloatingWindow("chart");
  initial[0].focus();
  initial[0].close();
  expect(focus).toHaveBeenCalledOnce();
  expect(close).toHaveBeenCalledOnce();
});