import 'dart:async';

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

import 'api_service_test.dart' as fixtures;

const iranBase = 'https://reelbox.dartty.top/api/';

void main() {
  TestWidgetsFlutterBinding.ensureInitialized();
  setUp(() => SharedPreferences.setMockInitialValues({}));

  test(
    'malicious persisted selections cannot redirect the first network request',
    () async {
      for (final invalid in [
        'https://reelbox.dartty.top:8443/api/',
        'http://reelbox.dartty.top:8443/api/',
        'https://reelbox.dartty.top.evil.example:8443/api/',
        'http://127.0.0.1:8123/api/',
        'https://user@reelbox.dartty.top:8443/api/',
      ]) {
        SharedPreferences.setMockInitialValues({
          'reelbox.api-selection.v1': invalid,
        });
        final adapter = fixtures.StubAdapter((_) => fixtures.jsonBody([]));
        final api = ApiService(dio: Dio()..httpClientAdapter = adapter);
        await api.genres();
        expect(api.baseUrl, ApiService.defaultBaseUrl, reason: invalid);
        expect(
          adapter.requests.single.uri.origin,
          'https://reelbox.dartty.top',
        );
      }
    },
  );

  test('explicit choice wins over delayed cache restoration', () async {
    final cacheStarted = Completer<void>();
    final cache = Completer<SharedPreferences>();
    var reads = 0;
    final api = ApiService(
      preferences: () {
        if (reads++ == 0) {
          cacheStarted.complete();
          return cache.future;
        }
        return SharedPreferences.getInstance();
      },
    );
    final restoration = api.initialize(discover: false);
    await cacheStarted.future;
    await api.setBaseUrl(iranBase);
    cache.complete(await SharedPreferences.getInstance());
    await restoration;
    expect(api.baseUrl, iranBase);
  });

  test('actor search restores the selected origin before building its absolute route', () async {
    await ApiService().setBaseUrl(iranBase);
    final adapter = fixtures.StubAdapter((_) => fixtures.jsonBody([]));
    final restarted = ApiService(dio: Dio()..httpClientAdapter = adapter);
    await restarted.actors(search: 'Example');
    expect(adapter.requests.single.uri.origin, 'https://reelbox.dartty.top');
  });

  test('Iran catalogue preserves media URLs and never falls back on failure', () async {
    const media =
        'https://original-media.example:9443/video.mp4?token=Exact%2FValue&x=1';
    final adapter = fixtures.StubAdapter(
      (_) => fixtures.jsonBody({
        'id': 7,
        'title': 'Movie',
        'sources': [
          {'id': 3, 'url': media, 'type': 'mp4'},
        ],
      }),
    );
    final api = ApiService(
      baseUrl: iranBase,
      dio: Dio()..httpClientAdapter = adapter,
    );
    expect((await api.poster(7)).sources.single.url, media);
    final offline = fixtures.StubAdapter(
      (r) => throw DioException(
        requestOptions: r,
        type: DioExceptionType.connectionError,
      ),
    );
    final failing = ApiService(
      baseUrl: iranBase,
      dio: Dio()..httpClientAdapter = offline,
    );
    await expectLater(failing.genres(), throwsA(isA<ApiException>()));
    expect(failing.baseUrl, iranBase);
    expect(offline.requests, hasLength(2));
    expect(
      offline.requests.every(
        (r) => r.uri.origin == 'https://reelbox.dartty.top',
      ),
      isTrue,
    );
  });

  test(
    'concurrent initialization shares migration without discovery or probes',
    () async {
      SharedPreferences.setMockInitialValues({
        'reelbox.api-selection.v1': 'https://ninwinios.info/api/',
      });
      final cache = Completer<SharedPreferences>();
      var reads = 0;
      final adapter = fixtures.StubAdapter((_) => fixtures.jsonBody([]));
      final api = ApiService(
        dio: Dio()..httpClientAdapter = adapter,
        preferences: () {
          reads++;
          return cache.future;
        },
      );
      final initialization = Future.wait([api.initialize(), api.initialize()]);
      cache.complete(await SharedPreferences.getInstance());
      await initialization;
      expect(reads, 1);
      expect(adapter.requests, isEmpty);
      expect(api.baseUrl, iranBase);
      final restarted = ApiService();
      await restarted.initialize(discover: false);
      expect(restarted.baseUrl, iranBase);
    },
  );

  test(
    'unsigned advertisements are never fetched or used during initialization',
    () async {
      for (final advertised in [iranBase, 'http://ninwinios.info/api/']) {
        final adapter = fixtures.StubAdapter(
          (r) => r.uri.host == 'ninnies-server.info'
              ? ResponseBody.fromString(advertised, 200)
              : fixtures.jsonBody([
                  {'id': 1, 'title': 'Drama'},
                ]),
        );
        final api = ApiService(dio: Dio()..httpClientAdapter = adapter);
        await api.initialize();
        expect(api.baseUrl, ApiService.defaultBaseUrl);
        expect(adapter.requests, isEmpty);
      }
    },
  );

  test('only exact HTTPS service origins and constructor loopback fixtures are accepted', () async {
    for (final invalid in [
      'http://reelbox.dartty.top:8443/api/',
      'https://reelbox.dartty.top:8443/api/',
      'https://reelbox.dartty.top:8444/api/',
      'https://reelbox.dartty.top.evil.example:8443/api/',
      'https://evil.reelbox.dartty.top:8443/api/',
      'https://ninwinios.info:8443/api/',
      'https://ninwinios.info/api/',
      'https://user@reelbox.dartty.top:8443/api/',
      'https://reelbox.dartty.top/api/?q=1',
      'https://reelbox.dartty.top/api/#fragment',
      'https://reelbox.dartty.top/api/../api/',
      ' $iranBase',
    ]) {
      expect(
        () => ApiService(baseUrl: invalid),
        throwsA(isA<ApiException>()),
        reason: invalid,
      );
      await expectLater(
        ApiService().setBaseUrl(invalid),
        throwsA(isA<ApiException>()),
        reason: invalid,
      );
    }
    for (final base in [
      'http://127.0.0.1:4589/api/',
      'http://localhost:4589/api/',
      'http://[::1]:4589/api/',
    ]) {
      final adapter = fixtures.StubAdapter((_) => fixtures.jsonBody([]));
      final api = ApiService(
        baseUrl: base,
        dio: Dio()..httpClientAdapter = adapter,
      );
      await api.genres();
      expect(adapter.requests.single.uri.origin, Uri.parse(base).origin);
    }
  });

  test(
    'explicit Iran choice persists and restores before first catalogue request',
    () async {
      final first = ApiService();
      await first.setBaseUrl(iranBase);
      final adapter = fixtures.StubAdapter((_) => fixtures.jsonBody([]));
      final restarted = ApiService(dio: Dio()..httpClientAdapter = adapter);
      await restarted.genres();
      expect(restarted.baseUrl, iranBase);
      expect(adapter.requests.single.uri.origin, 'https://reelbox.dartty.top');
      await restarted.initialize();
      expect(
        adapter.requests,
        hasLength(1),
        reason: 'Iran must not run original discovery',
      );
      await restarted.setBaseUrl(ApiService.defaultBaseUrl);
      final fresh = ApiService();
      await fresh.initialize(discover: false);
      expect(fresh.baseUrl, iranBase);
    },
  );
}