import { assert, describe, it } from "@effect/vitest";import { vi } from "vite-plus/test"; import {  activateWindowsForegroundWithApi,  isWindowsShellHostedForegroundWithApi,  type WindowsForegroundApi,} from "./WindowsForeground.ts"; function nativeHandle(value: bigint, bytes = 8): Buffer {  const handle = Buffer.alloc(bytes);  if (bytes === 8) handle.writeBigUInt64LE(value);  else handle.writeUInt32LE(Number(value));  return handle;} function makeApi(input: {  readonly foregroundWindow?: bigint;  readonly currentThreadId?: number;  readonly foregroundThreadId?: number;  readonly attached?: boolean;  readonly activated?: boolean;}) {  return {    getCurrentThreadId: vi.fn(() => input.currentThreadId ?? 10),    getForegroundWindow: vi.fn(() => input.foregroundWindow ?? 99n),    getWindowClassName: vi.fn(() => "Chrome_WidgetWin_1"),    getWindowThreadId: vi.fn(() => input.foregroundThreadId ?? 20),    getWindowThreadAndProcessId: vi.fn(() => ({      threadId: input.foregroundThreadId ?? 20,      processId: 500,    })),    getWindowText: vi.fn(() => ""),    getWindowRect: vi.fn(() => undefined),    getProcessImagePath: vi.fn(() => ""),    isKeyDown: vi.fn(() => false),    attachThreadInput: vi.fn((_source, _target, attach) =>      attach ? (input.attached ?? true) : true,    ),    setForegroundWindow: vi.fn(() => input.activated ?? true),  } satisfies WindowsForegroundApi;} describe("Windows foreground activation", () => {  it.each([4, 8])("activates a %i-byte native window handle", (bytes) => {    const api = makeApi({});    const handle = nativeHandle(41n, bytes);     assert.isTrue(activateWindowsForegroundWithApi(handle, api));     assert.deepEqual(api.attachThreadInput.mock.calls, [      [10, 20, true],      [10, 20, false],    ]);    assert.deepEqual(api.setForegroundWindow.mock.calls, [[41n]]);  });   it("does not disturb input queues when T3 is already foreground", () => {    const api = makeApi({ foregroundWindow: 41n });     assert.isTrue(activateWindowsForegroundWithApi(nativeHandle(41n), api));     assert.lengthOf(api.getCurrentThreadId.mock.calls, 0);    assert.lengthOf(api.attachThreadInput.mock.calls, 0);    assert.lengthOf(api.setForegroundWindow.mock.calls, 0);  });   it("does not attach a thread to itself", () => {    const api = makeApi({ currentThreadId: 20, foregroundThreadId: 20 });     assert.isTrue(activateWindowsForegroundWithApi(nativeHandle(41n), api));     assert.lengthOf(api.attachThreadInput.mock.calls, 0);    assert.deepEqual(api.setForegroundWindow.mock.calls, [[41n]]);  });   it("uses SetForegroundWindow's result as the activation receipt", () => {    const api = makeApi({ activated: false });     assert.isFalse(activateWindowsForegroundWithApi(nativeHandle(41n), api));     assert.deepEqual(api.attachThreadInput.mock.calls, [      [10, 20, true],      [10, 20, false],    ]);  });   it("still asks Windows directly when the input queues cannot be attached", () => {    const api = makeApi({ attached: false });     assert.isTrue(activateWindowsForegroundWithApi(nativeHandle(41n), api));     assert.deepEqual(api.attachThreadInput.mock.calls, [[10, 20, true]]);    assert.deepEqual(api.setForegroundWindow.mock.calls, [[41n]]);  });   it("rejects malformed native handles", () => {    const api = makeApi({});     assert.throws(() => activateWindowsForegroundWithApi(Buffer.alloc(6), api));    assert.lengthOf(api.getForegroundWindow.mock.calls, 0);  });   it("recognizes a shell-hosted foreground window", () => {    const api = makeApi({});    api.getWindowClassName.mockReturnValue("ApplicationFrameWindow");     assert.isTrue(isWindowsShellHostedForegroundWithApi(api));    assert.deepEqual(api.getWindowClassName.mock.calls, [[99n]]);  });   it("does not classify ordinary or missing foreground windows as shell-hosted", () => {    const ordinary = makeApi({});    const missing = makeApi({ foregroundWindow: 0n });     assert.isFalse(isWindowsShellHostedForegroundWithApi(ordinary));    assert.isFalse(isWindowsShellHostedForegroundWithApi(missing));    assert.lengthOf(missing.getWindowClassName.mock.calls, 0);  });});