import { afterEach, describe, expect, it, vi } from "vitest";
import { decodeQrImage } from "../../src/qr/decoder";

describe("QR image decoding", () => {
  afterEach(() => vi.unstubAllGlobals());

  it("uses native QR detection when available and closes the bitmap", async () => {
    const close = vi.fn();
    vi.stubGlobal(
      "createImageBitmap",
      vi.fn().mockResolvedValue({ width: 128, height: 128, close }),
    );
    vi.stubGlobal(
      "BarcodeDetector",
      class {
        async detect() {
          return [
            { rawValue: "otpauth://totp/Example?secret=JBSWY3DPEHPK3PXP" },
          ];
        }
      },
    );
    await expect(
      decodeQrImage(new File([new Uint8Array(10)], "qr.png")),
    ).resolves.toMatch(/^otpauth:/u);
    expect(close).toHaveBeenCalledOnce();
  });

  it("rejects oversized dimensions before pixel extraction", async () => {
    const close = vi.fn();
    vi.stubGlobal(
      "createImageBitmap",
      vi.fn().mockResolvedValue({ width: 4097, height: 1, close }),
    );
    await expect(
      decodeQrImage(new File([new Uint8Array(10)], "huge.png")),
    ).rejects.toThrow(/dimensions/iu);
    expect(close).toHaveBeenCalledOnce();
  });
});