import type { PreviewAnnotationPayload } from "@t3tools/contracts";import { afterEach, describe, expect, it, vi } from "vite-plus/test"; import {  appendPreviewAnnotationPrompt,  buildPreviewAnnotationPrompt,  capturePreviewAnnotationScreenshot,  extractTrailingPreviewAnnotation,} from "./previewAnnotation"; const annotation: PreviewAnnotationPayload = {  id: "annotation_1",  pageUrl: "http://localhost:3000",  pageTitle: "Example",  comment: "Make these cards feel related.",  elements: [],  regions: [{ id: "region_1", rect: { x: 10, y: 20, width: 100, height: 80 } }],  strokes: [    {      id: "stroke_1",      color: "#7c3aed",      width: 4,      points: [        { x: 10, y: 10 },        { x: 20, y: 20 },      ],      bounds: { x: 6, y: 6, width: 18, height: 18 },    },  ],  styleChanges: [    {      targetId: "element_1",      selector: ".card",      property: "border-radius",      previousValue: "4px",      value: "16px",    },  ],  screenshot: {    dataUrl: "data:image/png;base64,AA==",    width: 100,    height: 80,    cropRect: { x: 10, y: 20, width: 100, height: 80 },  },  createdAt: "2026-06-11T00:00:00.000Z",}; describe("preview annotations", () => {  it("describes regions, drawings, styles, and screenshot context", () => {    const result = buildPreviewAnnotationPrompt(annotation);    expect(result).toContain("Make these cards feel related.");    expect(result).toContain("1 marked region");    expect(result).toContain("1 drawing");    expect(result).toContain("border-radius: 4px → 16px");    expect(result).toContain("attached screenshot");  });   it("appends to an existing composer prompt", () => {    expect(      appendPreviewAnnotationPrompt("Fix this", annotation).startsWith(        "Fix this\n\n<preview_annotation>",      ),    ).toBe(true);  });   it("extracts annotation presentation from a sent prompt", () => {    const result = extractTrailingPreviewAnnotation(      appendPreviewAnnotationPrompt("Fix this", annotation),    );    expect(result.promptText).toBe("Fix this");    expect(result.annotation).toMatchObject({      title: "Example",      targetSummary: "1 marked region, 1 drawing.",      hasScreenshot: true,    });  });   it("extracts multiple trailing annotations one at a time", () => {    const first = appendPreviewAnnotationPrompt("Fix this", annotation);    const secondAnnotation = { ...annotation, id: "annotation_2", pageTitle: "Details" };    const second = appendPreviewAnnotationPrompt(first, secondAnnotation);    const extractedSecond = extractTrailingPreviewAnnotation(second);    const extractedFirst = extractTrailingPreviewAnnotation(extractedSecond.promptText);    expect(extractedSecond.annotation?.id).toBe("annotation_2");    expect(extractedFirst.annotation?.id).toBe("annotation_1");    expect(extractedFirst.promptText).toBe("Fix this");  });}); describe("preview annotation capture", () => {  afterEach(() => {    vi.useRealTimers();    vi.unstubAllGlobals();  });   it("returns the crop when the fetch resolves", async () => {    vi.stubGlobal("fetch", async () => new Response(new Blob(["png"], { type: "image/png" })));    const capture = await capturePreviewAnnotationScreenshot(annotation);    expect(capture.status).toBe("captured");  });   it("reports none when the annotation carries no crop", async () => {    const capture = await capturePreviewAnnotationScreenshot({ ...annotation, screenshot: null });    expect(capture).toEqual({ status: "none" });  });   it("fails instead of hanging when the crop never arrives", async () => {    vi.useFakeTimers();    vi.stubGlobal("fetch", () => new Promise<Response>(() => {}));    const capturePromise = capturePreviewAnnotationScreenshot(annotation, 1_000);    await vi.advanceTimersByTimeAsync(1_000);    expect(await capturePromise).toEqual({ status: "failed" });  });   it("fails when the crop fetch throws", async () => {    vi.stubGlobal("fetch", async () => {      throw new Error("data url unreadable");    });    expect(await capturePreviewAnnotationScreenshot(annotation)).toEqual({ status: "failed" });  });});