import 'dart:convert';
import 'dart:io';

import 'package:flutter_test/flutter_test.dart';
import 'package:reelbox/data/api_service.dart';
import 'package:reelbox/data/home_banners.dart';

class BannerApi extends ApiService {
  String? requested;
  dynamic response;
  bool fail = false;
  @override
  Future<dynamic> get(String path, {Map<String, dynamic>? query}) async {
    requested = path;
    if (fail) throw const ApiException('Offline');
    return response;
  }
}

void main() {
  test('real trusted transport preserves configured ads without restoring vendor feeds', () async {
    final server = await HttpServer.bind(InternetAddress.loopbackIPv4, 0);
    addTearDown(() => server.close(force: true));
    final paths = <String>[];
    server.listen((request) async {
      paths.add(request.uri.path);
      request.response.headers.contentType = ContentType.json;
      request.response.write(
        jsonEncode({
          'banners': [
            {
              'title_en': 'Fixture sponsor',
              'target_url': 'https://sponsor.example/offer',
            },
            {
              'title_en': 'Melodybox fixture',
              'target_url': 'https://vendor.example/',
            },
            {
              'title_en': 'Blocked link',
              'target_url': 'https://t.me/OtherChannel',
            },
          ],
        }),
      );
      await request.response.close();
    });
    final api = ApiService(baseUrl: 'http://127.0.0.1:${server.port}/api/');
    final banners = await HomeBannerService(api).load();
    expect(paths, ['/api/banners/']);
    expect(banners, hasLength(2));
    expect(banners.first, HomeBanner.telegram);
    expect(banners.last.title(false), 'Fixture sponsor');
    expect(banners.last.isAdvertisement, isTrue);
  });
  test(
    'unsafe ads are skipped independently and config work is bounded',
    () async {
      final api = BannerApi();
      final valid = {
        'title_en': 'Fixture sponsor',
        'target_url': 'https://sponsor.example/',
      };
      for (final target in [
        'http://sponsor.example/',
        'javascript:alert(1)',
        '//sponsor.example/',
        'https://user:pass@sponsor.example/',
        'https://sponsor.example:444/',
        'https://sponsor.example/ bad',
        'https://sponsor.example/\\\\evil',
        'https://',
        'https://t.me/OtherChannel',
        'https://sponsor.example/app.apk',
        'https://sponsor.example/%0aevil',
        'https://-bad.example/',
        'https://bad..example/',
        'https://bad.example./',
        'https://sponsor.example/%zz',
        'https://sponsor.example/${'x' * 2048}',
      ]) {
        api.response = {
          'banners': [
            {...valid, 'target_url': target},
            valid,
          ],
        };
        final banners = await HomeBannerService(api).load();
        expect(banners, hasLength(2), reason: target);
        expect(banners.last.target.toString(), 'https://sponsor.example/');
      }
      for (final invalid in [
        null,
        true,
        4,
        [],
        {},
        {'banners': {}},
        {
          'banners': [null, 7, true, {}],
        },
      ]) {
        api.response = invalid;
        expect(await HomeBannerService(api).load(), [HomeBanner.telegram]);
      }
      api.response = {
        'banners': [
          {...valid, 'title_en': 'x' * 81},
          {...valid, 'title_en': 'bad\u202etext'},
          {...valid, 'subtitle_en': 'x' * 181},
          {...valid, 'title_en': 5},
          {...valid, 'image_url': 'http://sponsor.example/image.jpg'},
          valid,
        ],
      };
      expect(await HomeBannerService(api).load(), hasLength(2));
      api.response = {'banners': List.filled(1000, valid)};
      expect(await HomeBannerService(api).load(), hasLength(6));
      api.response = {
        'banners': [...List.filled(20, {}), valid],
      };
      expect(await HomeBannerService(api).load(), [HomeBanner.telegram]);
    },
  );
  test(
    'configured bilingual ads append after Telegram with optional image',
    () async {
      final api = BannerApi()
        ..response = {
          'banners': [
            {
              'title_en': 'Test sponsor',
              'title_fa': 'حامی آزمایشی',
              'subtitle_en': 'Fixture only',
              'subtitle_fa': 'فقط دادهٔ آزمایشی',
              'target_url': 'https://sponsor.example/offer?ref=reelbox',
              'image_url': 'https://sponsor.example/banner.jpg',
            },
            {
              'title_en': 'Text sponsor',
              'target_url': 'https://sponsor.example/text',
            },
          ],
        };
      final banners = await HomeBannerService(api).load();
      expect(banners, hasLength(3));
      expect(banners.first, same(HomeBanner.telegram));
      expect(banners[1].isAdvertisement, isTrue);
      expect(banners[1].title(true), 'حامی آزمایشی');
      expect(banners[1].subtitle(true), 'فقط دادهٔ آزمایشی');
      expect(banners[1].image.toString(), 'https://sponsor.example/banner.jpg');
      expect(banners.last.title(true), 'Text sponsor');
      expect(banners.last.image, isNull);
    },
  );
  test(
    'default Telegram banner survives missing config and API failures',
    () async {
      final api = BannerApi();
      final service = HomeBannerService(api);
      for (final fail in [false, true]) {
        api.fail = fail;
        final banners = await service.load();
        expect(banners, hasLength(1));
        expect(banners.single.target.toString(), 'https://t.me/ReelBoxApp');
        expect(banners.single.title(false), 'ReelBox updates');
        expect(banners.single.subtitle(false), 'Updates and announcements');
        expect(banners.single.title(true), 'تازه‌های ریل‌باکس');
        expect(banners.single.isAdvertisement, isFalse);
      }
      expect(api.requested, 'banners/');
    },
  );
}