import { afterEach, describe, expect, it, vi } from 'vitest';
import { insideTelegram, telegramLaunch } from './telegram';

function stubWebApp(initData: string, startParam?: string) {
  vi.stubGlobal('window', {
    Telegram: {
      WebApp: {
        initData,
        initDataUnsafe: startParam ? { start_param: startParam } : {},
        themeParams: { bg_color: '#101418' },
        ready: () => {},
        expand: () => {},
      },
    },
  });
}

describe('telegram launch detection', () => {
  afterEach(() => vi.unstubAllGlobals());

  it('is not inside Telegram without a window', () => {
    expect(insideTelegram()).toBe(false);
  });

  it('is inside Telegram only with non-empty initData', () => {
    stubWebApp('');
    expect(insideTelegram()).toBe(false);
    stubWebApp('query_id=abc');
    expect(insideTelegram()).toBe(true);
  });

  it('telegramLaunch returns initData, start param and theme', () => {
    stubWebApp('query_id=abc', 'g123');
    const launch = telegramLaunch();
    expect(launch.initData).toBe('query_id=abc');
    expect(launch.startParam).toBe('g123');
    expect(launch.theme?.bg_color).toBe('#101418');
  });
});