import {
  parseAcceptLanguage,
  parseGeoLocale,
  resolveSuggestedLocale,
} from '../../src/comm/i18n/geo';

describe('T18: Geo / 浏览器语言自动建议', () => {
  describe('parseAcceptLanguage', () => {
    it('应将 zh* 映射为 zh-CN', () => {
      expect(parseAcceptLanguage('zh-CN,zh;q=0.9,en;q=0.8')).toBe('zh-CN');
      expect(parseAcceptLanguage('zh')).toBe('zh-CN');
      expect(parseAcceptLanguage('zh-TW')).toBe('zh-CN');
      expect(parseAcceptLanguage('zh-Hans-CN')).toBe('zh-CN');
    });

    it('应将 ar* 映射为 ar-SA', () => {
      expect(parseAcceptLanguage('ar-SA,ar;q=0.8')).toBe('ar-SA');
      expect(parseAcceptLanguage('ar')).toBe('ar-SA');
      expect(parseAcceptLanguage('ar-EG')).toBe('ar-SA');
    });

    it('应将 en* 映射为 en-US', () => {
      expect(parseAcceptLanguage('en-US,en;q=0.9')).toBe('en-US');
      expect(parseAcceptLanguage('en')).toBe('en-US');
      expect(parseAcceptLanguage('en-GB')).toBe('en-US');
    });

    it('未识别语言应回退 en-US', () => {
      expect(parseAcceptLanguage('fr-FR,fr;q=0.9')).toBe('en-US');
      expect(parseAcceptLanguage('ja,en;q=0.1')).toBe('en-US');
      expect(parseAcceptLanguage('')).toBe('en-US');
      expect(parseAcceptLanguage(undefined)).toBe('en-US');
    });

    it('应按 q 值选择首选语言', () => {
      expect(parseAcceptLanguage('en;q=0.4,zh-CN;q=0.9')).toBe('zh-CN');
      expect(parseAcceptLanguage('ar;q=0.2,en-US;q=0.8')).toBe('en-US');
    });
  });

  describe('parseGeoLocale', () => {
    it('应将 CN/TW/HK 映射为 zh-CN', () => {
      expect(parseGeoLocale({ 'cf-ipcountry': 'CN' })).toBe('zh-CN');
      expect(parseGeoLocale({ 'x-country': 'TW' })).toBe('zh-CN');
      expect(parseGeoLocale({ 'CF-IPCountry': 'hk' })).toBe('zh-CN');
    });

    it('应将 SA/AE/EG 映射为 ar-SA', () => {
      expect(parseGeoLocale({ 'cf-ipcountry': 'SA' })).toBe('ar-SA');
      expect(parseGeoLocale({ 'x-country': 'AE' })).toBe('ar-SA');
      expect(parseGeoLocale({ 'X-Country': 'eg' })).toBe('ar-SA');
    });

    it('其余国家应回退 en-US', () => {
      expect(parseGeoLocale({ 'cf-ipcountry': 'US' })).toBe('en-US');
      expect(parseGeoLocale({ 'x-country': 'JP' })).toBe('en-US');
      expect(parseGeoLocale({})).toBe('en-US');
      expect(parseGeoLocale(undefined)).toBe('en-US');
    });

    it('应优先使用 cf-ipcountry 再回退 x-country', () => {
      expect(
        parseGeoLocale({
          'cf-ipcountry': 'SA',
          'x-country': 'CN',
        })
      ).toBe('ar-SA');
      expect(parseGeoLocale({ 'x-country': 'CN' })).toBe('zh-CN');
    });
  });

  describe('resolveSuggestedLocale 优先级', () => {
    it('query.lang 应优先于 Accept-Language 与 geo country', () => {
      expect(
        resolveSuggestedLocale({
          lang: 'ar',
          headers: {
            'accept-language': 'zh-CN,zh;q=0.9',
            'cf-ipcountry': 'US',
          },
        })
      ).toBe('ar-SA');
      expect(
        resolveSuggestedLocale({
          lang: 'zh-TW',
          headers: {
            'accept-language': 'en-US',
            'x-country': 'SA',
          },
        })
      ).toBe('zh-CN');
    });

    it('无 query.lang 时应采用 Accept-Language', () => {
      expect(
        resolveSuggestedLocale({
          headers: {
            'accept-language': 'ar-EG,ar;q=0.8',
            'cf-ipcountry': 'US',
          },
        })
      ).toBe('ar-SA');
    });

    it('无 query.lang 与 Accept-Language 时应采用 geo country', () => {
      expect(
        resolveSuggestedLocale({
          headers: {
            'cf-ipcountry': 'HK',
          },
        })
      ).toBe('zh-CN');
      expect(
        resolveSuggestedLocale({
          headers: {
            'x-country': 'EG',
          },
        })
      ).toBe('ar-SA');
    });

    it('全无信号时应回退 en-US', () => {
      expect(resolveSuggestedLocale({})).toBe('en-US');
      expect(resolveSuggestedLocale({ lang: '   ', headers: {} })).toBe('en-US');
    });
  });
});