import { act, renderHook, waitFor } from '@testing-library/react';
import { afterEach, describe, expect, it, vi } from 'vitest';
import {
  DESKTOP_CLIENT_COOKIE_NAME,
  DESKTOP_COOKIE_NAME,
  getDesktopClientInfo,
  isDesktopClient,
  parseDesktopClientCookie,
  useIsDesktopClient,
} from './desktop-client';

/**
 * desktop-client.test — Gegenstueck zur Middleware (260917-h2s): liest das
 * Cookie `tessera_desktop`, das die Middleware auf jede Antwort setzt, wenn
 * der Desktop-Client `?desktop=1` an seine erste Navigation anhaengt.
 * Seit quick-260918-gza zusaetzlich `parseDesktopClientCookie()` /
 * `getDesktopClientInfo()` fuer das zweite Cookie `tessera_desktop_client`.
 */
function clearCookie() {
  document.cookie = `${DESKTOP_COOKIE_NAME}=; expires=Thu, 01 Jan 1970 00:00:00 GMT; path=/`;
  document.cookie = `${DESKTOP_CLIENT_COOKIE_NAME}=; expires=Thu, 01 Jan 1970 00:00:00 GMT; path=/`;
}

afterEach(() => {
  clearCookie();
});

describe('isDesktopClient', () => {
  it('ohne Cookie: false', () => {
    expect(isDesktopClient()).toBe(false);
  });

  it('mit tessera_desktop=1: true', () => {
    document.cookie = `${DESKTOP_COOKIE_NAME}=1; path=/`;
    expect(isDesktopClient()).toBe(true);
  });

  it('mit tessera_desktop=0: false', () => {
    document.cookie = `${DESKTOP_COOKIE_NAME}=0; path=/`;
    expect(isDesktopClient()).toBe(false);
  });

  it('ohne document: false', () => {
    vi.stubGlobal('document', undefined);
    expect(isDesktopClient()).toBe(false);
    vi.unstubAllGlobals();
  });
});

describe('useIsDesktopClient', () => {
  it('Cookie gesetzt: liefert nach dem Effekt true', async () => {
    document.cookie = `${DESKTOP_COOKIE_NAME}=1; path=/`;
    const { result } = renderHook(() => useIsDesktopClient());
    await waitFor(() => expect(result.current).toBe(true));
  });

  it('ohne Cookie: bleibt false', async () => {
    const { result } = renderHook(() => useIsDesktopClient());
    await act(async () => {});
    expect(result.current).toBe(false);
  });
});

describe('getDesktopClientInfo / parseDesktopClientCookie (quick-260918-gza)', () => {
  it('kodierte Form (wie der Browser sie in document.cookie haelt)', () => {
    expect(
      parseDesktopClientCookie('tessera_desktop=1; tessera_desktop_client=1.2.0%7Ca6d1a64%7Cwindows'),
    ).toEqual({ version: '1.2.0', commit: 'a6d1a64', os: 'windows' });
  });

  it('rohe Form (nicht kodiert)', () => {
    expect(parseDesktopClientCookie('tessera_desktop_client=1.2.0|a6d1a64|windows')).toEqual({
      version: '1.2.0',
      commit: 'a6d1a64',
      os: 'windows',
    });
  });

  it('leerer Commit bleibt leer', () => {
    expect(parseDesktopClientCookie('tessera_desktop_client=1.2.0%7C%7Clinux')).toEqual({
      version: '1.2.0',
      commit: '',
      os: 'linux',
    });
  });

  it('ohne Cookie: null', () => {
    expect(parseDesktopClientCookie('tessera_desktop=1')).toBeNull();
  });

  it('unvollstaendige oder leere Pflichtfelder: null', () => {
    expect(parseDesktopClientCookie('tessera_desktop_client=abc')).toBeNull();
    expect(parseDesktopClientCookie('tessera_desktop_client=1.2.0|x')).toBeNull();
    expect(parseDesktopClientCookie('tessera_desktop_client=|a6d1a64|linux')).toBeNull();
    expect(parseDesktopClientCookie('tessera_desktop_client=1.2.0|a6d1a64|')).toBeNull();
  });

  it('getDesktopClientInfo() liest document.cookie', () => {
    expect(getDesktopClientInfo()).toBeNull();
    document.cookie = 'tessera_desktop_client=1.2.0%7Ca6d1a64%7Cwindows; path=/';
    expect(getDesktopClientInfo()).toEqual({ version: '1.2.0', commit: 'a6d1a64', os: 'windows' });
  });

  it('getDesktopClientInfo() ohne document: null', () => {
    vi.stubGlobal('document', undefined);
    expect(getDesktopClientInfo()).toBeNull();
    vi.unstubAllGlobals();
  });
});