import 'dart:async';

import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:reelbox/app.dart';
import 'package:reelbox/data/api_service.dart';
import 'package:reelbox/data/models.dart';
import 'package:reelbox/state/app_state.dart';
import 'package:reelbox/ui/catalog.dart';
import 'package:shared_preferences/shared_preferences.dart';

class HomeBannerFixtureApi extends ApiService {
  bool fail = false;
  Completer<dynamic>? pending;
  dynamic bannerResponse = {'banners': []};
  int bannerCalls = 0;
  @override
  Future<dynamic> get(String path, {Map<String, dynamic>? query}) async {
    if (path != 'banners/') return [];
    bannerCalls++;
    if (fail) throw const ApiException('Offline');
    return pending == null ? bannerResponse : pending!.future;
  }

  @override
  Future<void> initialize({bool discover = true}) async {}
  @override
  Future<Map<String, dynamic>> home() async {
    if (fail) throw const ApiException('Offline');
    return {'genres': [], 'actors': [], 'countries': []};
  }

  @override
  Future<List<Map<String, dynamic>>> actors({
    int page = 1,
    String search = '',
  }) async => [];
  @override
  Future<List<Tag>> countries() async => [];
  @override
  Future<List<Tag>> genres() async => [];
}

Future<AppState> mountBannerHome(
  WidgetTester tester,
  HomeBannerFixtureApi api, {
  String locale = 'en',
}) async {
  SharedPreferences.setMockInitialValues({});
  final state = AppState(
    api: api,
    storage: await SharedPreferences.getInstance(),
  );
  await state.initialize(discover: false);
  await state.updateSettings(
    state.prefs.copyWith(locale: locale, introCompleted: true),
  );
  await tester.pumpWidget(MyApp(state: state));
  await tester.pumpAndSettle();
  return state;
}

void main() {
  testWidgets(
    'pending config keeps Telegram then labels bilingual ads and honors data saver',
    (tester) async {
      tester.view.physicalSize = const Size(390, 844);
      tester.view.devicePixelRatio = 1;
      addTearDown(tester.view.resetPhysicalSize);
      addTearDown(tester.view.resetDevicePixelRatio);
      final api = HomeBannerFixtureApi()..pending = Completer<dynamic>();
      final state = await mountBannerHome(tester, api);
      expect(find.text('ReelBox updates'), findsOneWidget);
      expect(find.text('Advertisement'), findsNothing);
      api.pending!.complete({
        'banners': [
          {
            'title_en': 'Fixture sponsor',
            'title_fa': 'حامی آزمایشی',
            'target_url': 'https://sponsor.example/offer',
            'image_url': 'https://sponsor.example/banner.jpg',
          },
        ],
      });
      await tester.pumpAndSettle();
      expect(find.text('Advertisement'), findsOneWidget);
      expect(find.text('Fixture sponsor'), findsOneWidget);
      expect(find.byType(Image), findsOneWidget);
      expect(find.text('ReelBox updates'), findsOneWidget);
      final launches = <String>[];
      const channel = MethodChannel('plugins.flutter.io/url_launcher');
      tester.binding.defaultBinaryMessenger.setMockMethodCallHandler(channel, (
        call,
      ) async {
        launches.add(call.arguments['url'] as String);
        return true;
      });
      addTearDown(
        () => tester.binding.defaultBinaryMessenger.setMockMethodCallHandler(
          channel,
          null,
        ),
      );
      await tester.tap(find.byKey(const Key('home-banner-ad-1')));
      await tester.pumpAndSettle();
      expect(launches, ['https://sponsor.example/offer']);
      await state.updateSettings(
        state.prefs.copyWith(locale: 'fa', dataSaver: true),
      );
      await tester.pumpAndSettle();
      expect(find.text('تبلیغات'), findsOneWidget);
      expect(find.text('حامی آزمایشی'), findsOneWidget);
      expect(find.byType(Image), findsNothing);
      expect(tester.takeException(), isNull);
      await tester.pumpWidget(const SizedBox());
      state.dispose();
    },
  );

  testWidgets(
    'failed external launch shows safe error and keeps official banner',
    (tester) async {
      const channel = MethodChannel('plugins.flutter.io/url_launcher');
      tester.binding.defaultBinaryMessenger.setMockMethodCallHandler(
        channel,
        (_) async => false,
      );
      addTearDown(
        () => tester.binding.defaultBinaryMessenger.setMockMethodCallHandler(
          channel,
          null,
        ),
      );
      final state = await mountBannerHome(tester, HomeBannerFixtureApi());
      await tester.tap(find.byKey(const Key('home-banner-telegram')));
      await tester.pump();
      expect(find.text('Could not open this link'), findsOneWidget);
      expect(find.text('ReelBox updates'), findsOneWidget);
      expect(tester.takeException(), isNull);
      await tester.pumpWidget(const SizedBox());
      state.dispose();
    },
  );
  testWidgets(
    'home Telegram is immediately clickable through API failure in both languages',
    (tester) async {
      tester.view.physicalSize = const Size(390, 844);
      tester.view.devicePixelRatio = 1;
      addTearDown(tester.view.resetPhysicalSize);
      addTearDown(tester.view.resetDevicePixelRatio);
      final launches = <MethodCall>[];
      const channel = MethodChannel('plugins.flutter.io/url_launcher');
      tester.binding.defaultBinaryMessenger.setMockMethodCallHandler(channel, (
        call,
      ) async {
        launches.add(call);
        return true;
      });
      addTearDown(
        () => tester.binding.defaultBinaryMessenger.setMockMethodCallHandler(
          channel,
          null,
        ),
      );
      final api = HomeBannerFixtureApi()..fail = true;
      final state = await mountBannerHome(tester, api);
      expect(find.byType(DiscoverPage), findsOneWidget);
      expect(find.text('ReelBox updates'), findsOneWidget);
      expect(find.text('Updates and announcements'), findsOneWidget);
      expect(find.text('Offline'), findsWidgets);
      await tester.tap(find.byKey(const Key('home-banner-telegram')));
      await tester.pumpAndSettle();
      expect(launches.single.method, 'launch');
      expect(launches.single.arguments['url'], 'https://t.me/ReelBoxApp');
      expect(launches.single.arguments['useWebView'], false);
      await state.updateSettings(state.prefs.copyWith(locale: 'fa'));
      await tester.pumpAndSettle();
      expect(find.text('تازه‌های ریل‌باکس'), findsOneWidget);
      expect(find.text('به‌روزرسانی‌ها و اطلاعیه‌ها'), findsOneWidget);
      expect(
        Directionality.of(tester.element(find.text('تازه‌های ریل‌باکس'))),
        TextDirection.rtl,
      );
      expect(tester.takeException(), isNull);
      await tester.pumpWidget(const SizedBox());
      state.dispose();
    },
  );
}