import 'package:flutter_test/flutter_test.dart';
import 'package:http/http.dart' as http;
import 'package:http/testing.dart';
import 'package:pangolin_vpn/l10n/app_text.dart';
import 'package:pangolin_vpn/services/api_client.dart';
import 'package:pangolin_vpn/services/notices_api.dart';

ApiClient _c(MockClient m) => ApiClient(baseUrl: 'http://x', getToken: () => 't', refresh: () async => false, client: m);

const _utf8Json = {'content-type': 'application/json; charset=utf-8'};

void main() {
  test('fetch 解析公告列表 + unread_count(双语字段)', () async {
    final api = NoticesApi(_c(MockClient((req) async {
      expect(req.url.path, '/v1/notices');
      return http.Response(
          '{"notices":[' 
          '{"id":1,"type":"maintenance","title_zh":"维护通知","title_en":"Maintenance",'
          '"body_zh":"今晚维护","body_en":"Tonight maintenance","link":"https://x/1",'
          '"published_at":"2026-07-10T08:00:00Z","unread":true},'
          '{"id":2,"type":"promo","title_zh":"活动","title_en":"Promo",'
          '"published_at":"2026-07-09T08:00:00Z","unread":false}'
          '],"unread_count":1}',
          200,
          headers: _utf8Json);
    })));
    final data = await api.fetch();
    expect(data.items.length, 2);
    expect(data.unreadCount, 1);

    final first = data.items[0];
    expect(first.id, 1);
    expect(first.type, 'maintenance');
    expect(first.titleZh, '维护通知');
    expect(first.titleEn, 'Maintenance');
    expect(first.bodyZh, '今晚维护');
    expect(first.bodyEn, 'Tonight maintenance');
    expect(first.link, 'https://x/1');
    expect(first.publishedAt, DateTime.parse('2026-07-10T08:00:00Z'));
    expect(first.unread, true);
    expect(first.title(AppLang.zh), '维护通知');
    expect(first.title(AppLang.en), 'Maintenance');

    final second = data.items[1];
    expect(second.id, 2);
    expect(second.bodyZh, '');
    expect(second.bodyEn, '');
    expect(second.link, '');
    expect(second.unread, false);
    // 非 zh 语言取 en 兜底
    expect(second.title(AppLang.ja), second.titleEn);
  });

  test('fetch 缺字段安全默认(不 crash)', () async {
    final api = NoticesApi(_c(MockClient((req) async {
      return http.Response('{}', 200);
    })));
    final data = await api.fetch();
    expect(data.items, isEmpty);
    expect(data.unreadCount, 0);
  });

  test('markRead 打 POST /v1/notices/read', () async {
    var called = false;
    final api = NoticesApi(_c(MockClient((req) async {
      called = true;
      expect(req.method, 'POST');
      expect(req.url.path, '/v1/notices/read');
      return http.Response('{"ok":true}', 200);
    })));
    await api.markRead();
    expect(called, true);
  });
}