import { describe, it, expect, vi, beforeEach } from 'vitest';

interface ChromeStub {
  runtime: { sendMessage: ReturnType<typeof vi.fn> };
}

interface GlobalWithChrome {
  chrome?: ChromeStub;
  MediaRecorder?: { isTypeSupported: (mime: string) => boolean };
}

describe('codec strict mode', () => {
  beforeEach(() => {
    vi.resetModules();
    (globalThis as unknown as GlobalWithChrome).chrome = {
      runtime: { sendMessage: vi.fn() },
    };
  });

  it('throws on unsupported vp9 and emits RECORDING_ERROR', async () => {
    (globalThis as unknown as GlobalWithChrome).MediaRecorder = {
      isTypeSupported: vi.fn().mockReturnValue(false),
    };
    const mod = await import('../../src/offscreen/recorder');
    expect(() => mod.assertCodecSupported()).toThrow(/vp9 unsupported/);
    const stub = (globalThis as unknown as GlobalWithChrome).chrome!;
    expect(stub.runtime.sendMessage).toHaveBeenCalledWith(
      expect.objectContaining({ type: 'RECORDING_ERROR' })
    );
  });

  it('does not throw when vp9 IS supported', async () => {
    (globalThis as unknown as GlobalWithChrome).MediaRecorder = {
      isTypeSupported: vi.fn().mockReturnValue(true),
    };
    const mod = await import('../../src/offscreen/recorder');
    expect(() => mod.assertCodecSupported()).not.toThrow();
    const stub = (globalThis as unknown as GlobalWithChrome).chrome!;
    expect(stub.runtime.sendMessage).not.toHaveBeenCalledWith(
      expect.objectContaining({ type: 'RECORDING_ERROR' })
    );
  });
});