import 'dart:async';

import 'package:flutter/foundation.dart';
import 'package:flutter/services.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:reelbox/media/native_player.dart';

void main() {
  TestWidgetsFlutterBinding.ensureInitialized();
  const channel = MethodChannel('org.reelbox/media');
  setUp(() => debugDefaultTargetPlatformOverride = TargetPlatform.android);
  tearDown(() {
    debugDefaultTargetPlatformOverride = null;
    TestDefaultBinaryMessengerBinding.instance.defaultBinaryMessenger
        .setMockMethodCallHandler(channel, null);
  });

  test('awaits exit and sends exact URL, title and checkpoint', () async {
    final exit = Completer<Map<String, Object>>();
    MethodCall? received;
    TestDefaultBinaryMessengerBinding.instance.defaultBinaryMessenger
        .setMockMethodCallHandler(channel, (call) {
          received = call;
          return exit.future;
        });
    var returned = false;
    const url = 'https://media.example.org/a%2Fb.m3u8?sig=a%2Bz&x=1';
    final pending =
        NativePlayerBridge.open(
          url: url,
          title: 'عنوان — episode',
          position: const Duration(milliseconds: 12345),
          autoplay: false,
          externalPackage: 'vlc',
          orientation: 'landscape',
          videoFit: 'cover',
          speed: 1.25,
          subtitleEnabled: false,
        ).then((result) {
          returned = true;
          return result;
        });
    await Future<void>.delayed(Duration.zero);
    expect(returned, isFalse);
    expect(received!.method, 'openNativePlayer');
    expect(received!.arguments, containsPair('url', url));
    expect(received!.arguments, containsPair('positionMs', 12345));
    expect(received!.arguments, containsPair('autoplay', false));
    expect(received!.arguments, containsPair('externalPackage', 'vlc'));
    expect(received!.arguments, containsPair('subtitleEnabled', false));
    expect(received!.arguments, containsPair('orientation', 'landscape'));
    expect(received!.arguments, containsPair('videoFit', 'cover'));
    expect(received!.arguments, containsPair('speed', 1.25));
    exit.complete({
      'positionMs': 42000,
      'durationMs': 90000,
      'opened': true,
      'completed': false,
    });
    final result = await pending;
    expect(result.position.inMilliseconds, 42000);
    expect(result.duration.inMilliseconds, 90000);
    expect(result.opened, isTrue);
    expect(result.completed, isFalse);
  });

  test(
    'local and loopback sources and optional subtitles are unchanged',
    () async {
      final calls = <MethodCall>[];
      TestDefaultBinaryMessengerBinding.instance.defaultBinaryMessenger
          .setMockMethodCallHandler(channel, (call) async {
            calls.add(call);
            return {
              'positionMs': 0,
              'durationMs': 0,
              'opened': false,
              'completed': false,
            };
          });
      for (final url in [
        '/data/user/0/org.reelbox.app/files/فیلم.mkv',
        'http://127.0.0.1:49123/media/lease/index.m3u8?token=a%2Bz',
      ]) {
        final result = await NativePlayerBridge.open(
          url: url,
          title: 'Film',
          subtitleUrl: 'https://media.example.org/sub.vtt?token=a%2Fz',
          hardwareAcceleration: false,
          pipEnabled: false,
        );
        expect(calls.last.arguments, containsPair('url', url));
        expect(
          calls.last.arguments,
          containsPair(
            'subtitleUrl',
            'https://media.example.org/sub.vtt?token=a%2Fz',
          ),
        );
        expect(
          calls.last.arguments,
          containsPair('hardwareAcceleration', false),
        );
        expect(calls.last.arguments, containsPair('pipEnabled', false));
        expect(result.opened, isFalse);
      }
      expect(calls, hasLength(2));
    },
  );

  test(
    'rejects malformed exit maps instead of manufacturing progress',
    () async {
      for (final response in [
        null,
        {
          'positionMs': -1,
          'durationMs': 10,
          'opened': true,
          'completed': false,
        },
        {
          'positionMs': double.nan,
          'durationMs': 10,
          'opened': true,
          'completed': false,
        },
        {
          'positionMs': 0x7fffffffffffffff,
          'durationMs': 0,
          'opened': true,
          'completed': false,
        },
        {
          'positionMs': 1.5,
          'durationMs': 10,
          'opened': true,
          'completed': false,
        },
        {
          'positionMs': 10,
          'durationMs': -1,
          'opened': true,
          'completed': false,
        },
        {
          'positionMs': 10,
          'durationMs': 20,
          'opened': 'true',
          'completed': true,
        },
      ]) {
        TestDefaultBinaryMessengerBinding.instance.defaultBinaryMessenger
            .setMockMethodCallHandler(channel, (_) async => response);
        await expectLater(
          NativePlayerBridge.open(
            url: 'https://media.example.org/video.mp4',
            title: 'Film',
          ),
          throwsFormatException,
        );
      }
      final bounded = NativePlaybackResult.fromMap({
        'positionMs': 1000,
        'durationMs': 100,
        'opened': false,
        'completed': true,
      });
      expect(bounded.position.inMilliseconds, 100);
      expect(bounded.completed, isFalse);
    },
  );

  test('completion requires a credible near-end checkpoint, not just EOF', () {
    for (final sample in <Map<String, Object>>[
      {'positionMs': 180000, 'durationMs': 3600000},
      {'positionMs': 180000, 'durationMs': 0},
      {'positionMs': 0, 'durationMs': 3600000},
      {'positionMs': 3600001, 'durationMs': 3600000},
      {'positionMs': 3597000, 'durationMs': 3600000},
      {'positionMs': 3600000, 'durationMs': 3600000, 'opened': false},
      {'positionMs': 3600000, 'durationMs': 3600000, 'completed': false},
    ]) {
      final result = NativePlaybackResult.fromMap({
        'opened': true,
        'completed': true,
        ...sample,
      });
      expect(result.completed, isFalse, reason: sample.toString());
    }
    for (final position in [3599500, 3600000]) {
      final result = NativePlaybackResult.fromMap({
        'positionMs': position,
        'durationMs': 3600000,
        'opened': true,
        'completed': true,
      });
      expect(result.completed, isTrue);
    }
  });

  test('platform failures and busy results propagate without retry', () async {
    var calls = 0;
    TestDefaultBinaryMessengerBinding.instance.defaultBinaryMessenger
        .setMockMethodCallHandler(channel, (_) async {
          calls++;
          throw PlatformException(code: 'NATIVE_PLAYER_BUSY');
        });
    await expectLater(
      NativePlayerBridge.open(
        url: 'https://media.example.org/video.mp4',
        title: 'Film',
      ),
      throwsA(isA<PlatformException>()),
    );
    expect(calls, 1);
  });

  test('unsupported platforms do not call Android', () async {
    debugDefaultTargetPlatformOverride = TargetPlatform.linux;
    TestDefaultBinaryMessengerBinding.instance.defaultBinaryMessenger
        .setMockMethodCallHandler(
          channel,
          (_) async => fail('Android was invoked'),
        );
    await expectLater(
      NativePlayerBridge.open(
        url: 'https://media.example.org/video.mp4',
        title: 'Film',
      ),
      throwsUnsupportedError,
    );
  });

  test('invalid launch preferences fail before starting an activity', () async {
    TestDefaultBinaryMessengerBinding.instance.defaultBinaryMessenger
        .setMockMethodCallHandler(channel, (_) async {
          fail('Invalid preferences reached Android');
        });
    await expectLater(
      NativePlayerBridge.open(
        url: 'https://media.example.org/video.mp4',
        title: 'Film',
        speed: double.nan,
      ),
      throwsArgumentError,
    );
    await expectLater(
      NativePlayerBridge.open(
        url: 'https://media.example.org/video.mp4',
        title: 'Film',
        orientation: 'invalid',
      ),
      throwsArgumentError,
    );
    await expectLater(
      NativePlayerBridge.open(
        url: 'https://media.example.org/video.mp4',
        title: 'Film',
        videoFit: 'invalid',
      ),
      throwsArgumentError,
    );
    await expectLater(
      NativePlayerBridge.open(url: '', title: 'Film'),
      throwsArgumentError,
    );
  });
}