import { assert, beforeEach, it, vi } from "vite-plus/test";

const { execFileMock } = vi.hoisted(() => ({ execFileMock: vi.fn() }));

vi.mock("node:child_process", () => ({ execFile: execFileMock }));

import { activeWindow } from "./ActiveWindow.ts";

beforeEach(() => {
  execFileMock.mockReset();
});

function stubMacLookup(stdout: string) {
  execFileMock.mockImplementation(
    (
      _file: string,
      _args: ReadonlyArray<string>,
      _options: unknown,
      callback: (error: Error | null, stdout: string) => void,
    ) => callback(null, stdout),
  );
}

function macLookup(
  windows: ReadonlyArray<{
    id: number;
    title: string;
    bounds: { x: number; y: number; width: number; height: number };
    alpha?: number;
  }>,
) {
  return JSON.stringify({
    owner: {
      name: "Editor",
      processId: 123,
      path: "/Applications/Editor.app",
      bundleId: "com.example.editor",
    },
    windows: windows.map((window) => ({ ...window, alpha: window.alpha ?? 1 })),
  });
}

it("parses the frontmost macOS window from the osascript lookup", async () => {
  stubMacLookup(
    macLookup([
      {
        id: 42,
        title: "main.ts",
        bounds: { x: 10, y: 20, width: 800, height: 600 },
      },
    ]) + "\n",
  );

  const window = await activeWindow("darwin");

  assert.deepEqual(window, {
    platform: "macos",
    id: 42,
    title: "main.ts",
    bounds: { x: 10, y: 20, width: 800, height: 600 },
    owner: {
      name: "Editor",
      processId: 123,
      path: "/Applications/Editor.app",
      bundleId: "com.example.editor",
    },
  });
  const [file, args] = execFileMock.mock.calls[0]!;
  assert.strictEqual(file, "/usr/bin/osascript");
  assert.deepEqual(args.slice(0, 3), ["-l", "JavaScript", "-e"]);
});

it.each([
  {
    name: "transparent and untitled helpers",
    helpers: [
      {
        id: 1,
        title: "",
        bounds: { x: -1, y: -44, width: 1_680, height: 44 },
        alpha: 0,
      },
      { id: 2, title: "", bounds: { x: 0, y: 0, width: 1_680, height: 68 } },
    ],
    content: {
      id: 3,
      title: "Document",
      bounds: { x: 0, y: 0, width: 1_680, height: 1_050 },
    },
  },
  {
    name: "Chrome strips stacked above the content window",
    helpers: [
      { id: 75, title: "", bounds: { x: 0, y: 39, width: 1_800, height: 41 } },
      { id: 74, title: "", bounds: { x: 0, y: 80, width: 1_800, height: 81 } },
      { id: 1691, title: "", bounds: { x: 0, y: 39, width: 1_800, height: 158 } },
    ],
    content: {
      id: 71,
      title: "(10) Video - YouTube",
      bounds: { x: 0, y: 161, width: 1_800, height: 1_008 },
    },
  },
  {
    name: "vertical strips at a negative desktop origin",
    helpers: [
      { id: 1, title: "", bounds: { x: -122, y: -100, width: 41, height: 1_000 } },
      { id: 2, title: "", bounds: { x: -81, y: -100, width: 81, height: 1_000 } },
    ],
    content: {
      id: 3,
      title: "Document",
      bounds: { x: 0, y: -100, width: 1_008, height: 1_000 },
    },
  },
  {
    name: "a smaller front window's strips with a larger background window",
    helpers: [
      { id: 75, title: "", bounds: { x: 100, y: 139, width: 1_200, height: 41 } },
      { id: 74, title: "", bounds: { x: 100, y: 180, width: 1_200, height: 81 } },
    ],
    content: {
      id: 71,
      title: "Video - YouTube",
      bounds: { x: 100, y: 261, width: 1_200, height: 700 },
    },
    background: [
      { id: 80, title: "Other document", bounds: { x: 0, y: 39, width: 1_800, height: 1_130 } },
    ],
  },
  {
    name: "the screen-sharing indicator",
    helpers: [
      { id: 90, title: "Window", bounds: { x: 723, y: 33, width: 66, height: 20 } },
      { id: 91, title: "", bounds: { x: 0, y: 0, width: 1_512, height: 32 }, alpha: 0 },
    ],
    content: {
      id: 92,
      title: "T3 Code (Nightly)",
      bounds: { x: 0, y: 33, width: 1_512, height: 949 },
    },
  },
])("selects the content window behind $name", async ({ helpers, content, background = [] }) => {
  stubMacLookup(macLookup([...helpers, content, ...background]));

  const window = await activeWindow("darwin");

  assert.strictEqual(window?.id, content.id);
  assert.deepEqual(window?.bounds, content.bounds);
});

it.each([
  { name: "untitled dialog", title: "", bounds: { x: 300, y: 200, width: 400, height: 240 } },
  { name: "titled palette", title: "Palette", bounds: { x: 0, y: 0, width: 800, height: 50 } },
  {
    name: "small titled palette",
    title: "Timer",
    bounds: { x: 200, y: 200, width: 80, height: 60 },
  },
  { name: "offset untitled strip", title: "", bounds: { x: 100, y: 100, width: 800, height: 50 } },
  { name: "tall untitled window", title: "", bounds: { x: 0, y: 0, width: 800, height: 900 } },
  {
    name: "horizontal strip below the document",
    title: "",
    bounds: { x: 0, y: 1_200, width: 800, height: 50 },
  },
  {
    name: "horizontal strip inside the document",
    title: "",
    bounds: { x: 0, y: 600, width: 800, height: 50 },
  },
  {
    name: "horizontal strip far above the document",
    title: "",
    bounds: { x: 0, y: -300, width: 800, height: 50 },
  },
  {
    name: "vertical strip right of the document",
    title: "",
    bounds: { x: 900, y: 0, width: 50, height: 1_000 },
  },
  {
    name: "vertical strip inside the document",
    title: "",
    bounds: { x: 400, y: 0, width: 50, height: 1_000 },
  },
  {
    name: "vertical strip far left of the document",
    title: "",
    bounds: { x: -250, y: 0, width: 50, height: 1_000 },
  },
])("keeps a frontmost $name ahead of a larger document", async ({ title, bounds }) => {
  stubMacLookup(
    macLookup([
      { id: 1, title, bounds },
      { id: 2, title: "Document", bounds: { x: 0, y: 0, width: 800, height: 1_000 } },
    ]),
  );

  const window = await activeWindow("darwin");

  assert.strictEqual(window?.id, 1);
  assert.deepEqual(window?.bounds, bounds);
});

it("keeps an untitled content window ahead of a much taller background window", async () => {
  const bounds = { x: 0, y: 0, width: 800, height: 900 };
  stubMacLookup(
    macLookup([
      { id: 1, title: "", bounds },
      { id: 2, title: "Background document", bounds: { x: 0, y: 0, width: 800, height: 4_000 } },
    ]),
  );

  const window = await activeWindow("darwin");

  assert.strictEqual(window?.id, 1);
  assert.deepEqual(window?.bounds, bounds);
});