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

describe("opt-in camera QR scanning", () => {
  afterEach(() => {
    vi.unstubAllGlobals();
    vi.restoreAllMocks();
  });

  it("requests only video and stops every track after a match", async () => {
    const stop = vi.fn();
    const getUserMedia = vi.fn().mockResolvedValue({
      getTracks: () => [{ stop }],
    });
    Object.defineProperty(navigator, "mediaDevices", {
      configurable: true,
      value: { getUserMedia },
    });
    vi.stubGlobal("isSecureContext", true);
    vi.stubGlobal(
      "BarcodeDetector",
      class {
        detect = vi
          .fn()
          .mockResolvedValue([{ rawValue: "otpauth://totp/Test" }]);
      },
    );
    const video = document.createElement("video");
    vi.spyOn(video, "play").mockResolvedValue();
    vi.spyOn(video, "pause").mockImplementation(() => undefined);
    Object.defineProperty(video, "readyState", {
      configurable: true,
      value: HTMLMediaElement.HAVE_CURRENT_DATA,
    });
    await expect(
      scanQrFromCamera(video, new AbortController().signal),
    ).resolves.toBe("otpauth://totp/Test");
    expect(getUserMedia).toHaveBeenCalledWith(
      expect.objectContaining({ audio: false, video: expect.any(Object) }),
    );
    expect(stop).toHaveBeenCalledOnce();
    expect(video.srcObject).toBeNull();
  });

  it("does not request permission after prior cancellation", async () => {
    const getUserMedia = vi.fn();
    Object.defineProperty(navigator, "mediaDevices", {
      configurable: true,
      value: { getUserMedia },
    });
    vi.stubGlobal("isSecureContext", true);
    const controller = new AbortController();
    controller.abort();
    await expect(
      scanQrFromCamera(document.createElement("video"), controller.signal),
    ).rejects.toMatchObject({ name: "AbortError" });
    expect(getUserMedia).not.toHaveBeenCalled();
  });
});