import { describe, expect, test } from "bun:test";
import { resolveLayerDrawImage, resolveTextLayerDraw } from "./exportArtboardPng";

describe("artboard PNG export", () => {
  test("draws only cropped source pixels at their retained document position", () => {
    const draw = resolveLayerDrawImage({
      id: "layer", type: "raster", name: "Layer", visible: true, locked: false, opacity: 1, assetId: "asset",
      sourceRect: { x: 10, y: 5, w: 40, h: 20 },
      transform: { position: { x: 100, y: 50 }, scale: { x: 2, y: 3 }, rotation: 0 },
    }, { w: 200, h: 100 });

    expect(draw).toEqual({
      source: { x: 10, y: 5, w: 40, h: 20 },
      destination: { x: 120, y: 65, w: 80, h: 60 },
    });
  });

  test("uses deterministic text data centered for renderer rotation parity", () => {
    const draw = resolveTextLayerDraw({ id: "text", type: "text", name: "Text", visible: true, locked: false, opacity: 1, transform: { position: { x: 10, y: 20 }, scale: { x: 2, y: 3 }, rotation: 1 }, content: "AB", style: { fontFamily: "Arial", fontSize: 10, fontWeight: 400, fontStyle: "normal", color: "#ffffff", alignment: "center", lineHeight: 1.2 } });
    expect(draw.size).toEqual({ w: 10.8, h: 12 });
    expect(draw.center).toEqual({ x: 20.8, y: 38 });
    expect(draw.textX).toBe(0);
  });
});