import 'dart:async';

import 'package:flutter/services.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:mattermost_push_plugin/mattermost_push_plugin.dart';

void main() {
  TestWidgetsFlutterBinding.ensureInitialized();

  group('NotificationOpenedEvent.fromMap', () {
    test('parses server_url, channel_id, root_id, is_crt_enabled', () {
      final event = NotificationOpenedEvent.fromMap({
        'server_url': 'https://mm.example.com',
        'channel_id': 'channel-123',
        'root_id': 'root-456',
        'is_crt_enabled': 'true',
      });

      expect(event.serverUrl, 'https://mm.example.com');
      expect(event.channelId, 'channel-123');
      expect(event.rootId, 'root-456');
      expect(event.isCRTEnabled, isTrue);
    });

    test('defaults isCRTEnabled to false when flag is absent or non-true', () {
      final missing = NotificationOpenedEvent.fromMap({
        'server_url': 'https://mm.example.com',
        'channel_id': 'channel-123',
      });
      expect(missing.isCRTEnabled, isFalse);

      final falsy = NotificationOpenedEvent.fromMap({
        'is_crt_enabled': 'false',
      });
      expect(falsy.isCRTEnabled, isFalse);
    });
  });

  group('MattermostPushPlugin.handleNativeEvent', () {
    late MattermostPushPlugin plugin;
    final actionChannel = MethodChannel(MattermostPushPlugin.actionChannelName);

    setUp(() {
      plugin = MattermostPushPlugin.instance;
      plugin.onNavigateToChannel = null;
      plugin.onNavigateToThread = null;
      plugin.onDeviceTokenReady = null;
    });

    tearDown(() {
      TestDefaultBinaryMessengerBinding.instance.defaultBinaryMessenger
          .setMockMethodCallHandler(actionChannel, null);
    });

    test('opened event emits NotificationOpenedEvent on stream', () async {
      final future = plugin.onNotificationOpened.first;

      plugin.handleNativeEvent({
        'type': PushNotificationType.opened,
        'server_url': 'https://mm.example.com',
        'channel_id': 'channel-123',
      });

      final event = await future;
      expect(event.serverUrl, 'https://mm.example.com');
      expect(event.channelId, 'channel-123');
    });

    test(
      'message event with userInteraction routes through opened handler',
      () async {
        String? navServer;
        String? navChannel;
        plugin.onNavigateToChannel = (s, c) {
          navServer = s;
          navChannel = c;
        };

        plugin.handleNativeEvent({
          'type': PushNotificationType.message,
          'userInteraction': true,
          'server_url': 'https://mm.example.com',
          'channel_id': 'channel-xyz',
        });

        expect(navServer, 'https://mm.example.com');
        expect(navChannel, 'channel-xyz');
      },
    );

    test('opened event with CRT and rootId routes to thread callback', () {
      String? navServer;
      String? navRoot;
      plugin.onNavigateToThread = (s, r) {
        navServer = s;
        navRoot = r;
      };

      plugin.handleNativeEvent({
        'type': PushNotificationType.opened,
        'server_url': 'https://mm.example.com',
        'channel_id': 'channel-123',
        'root_id': 'root-789',
        'is_crt_enabled': 'true',
      });

      expect(navServer, 'https://mm.example.com');
      expect(navRoot, 'root-789');
    });

    test('opened event without server_url skips navigation callbacks', () {
      var channelCalled = false;
      var threadCalled = false;
      plugin.onNavigateToChannel = (_, _) => channelCalled = true;
      plugin.onNavigateToThread = (_, _) => threadCalled = true;

      plugin.handleNativeEvent({
        'type': PushNotificationType.opened,
        'channel_id': 'channel-123',
      });

      expect(channelCalled, isFalse);
      expect(threadCalled, isFalse);
    });

    test('every event is forwarded to onNotification stream', () async {
      final future = plugin.onNotification.first;

      plugin.handleNativeEvent({
        'type': PushNotificationType.clear,
        'channel_id': 'channel-123',
      });

      final raw = await future;
      expect(raw['type'], PushNotificationType.clear);
      expect(raw['channel_id'], 'channel-123');
    });

    test(
      'token_refresh event saves formatted device token and invokes callback',
      () async {
        String? channelToken;
        TestDefaultBinaryMessengerBinding.instance.defaultBinaryMessenger
            .setMockMethodCallHandler(actionChannel, (call) async {
              if (call.method == 'saveDeviceToken') {
                final args = call.arguments as Map;
                channelToken = args['token'] as String?;
              }
              return null;
            });

        final completer = Completer<String>();
        plugin.onDeviceTokenReady = completer.complete;

        plugin.handleNativeEvent({
          'type': PushNotificationType.tokenRefresh,
          'token': 'raw-token',
        });

        final callbackToken = await completer.future;
        expect(channelToken, 'android_rn-v2:raw-token');
        expect(callbackToken, 'android_rn-v2:raw-token');
      },
    );

    test(
      'debugSendNativeEventForTesting invokes native debug method',
      () async {
        MethodCall? capturedCall;
        TestDefaultBinaryMessengerBinding.instance.defaultBinaryMessenger
            .setMockMethodCallHandler(actionChannel, (call) async {
              capturedCall = call;
              return null;
            });

        await plugin.debugSendNativeEventForTesting({
          'type': PushNotificationType.opened,
          'server_url': 'https://mm.example.com',
          'channel_id': 'channel-debug',
        });

        expect(capturedCall?.method, 'debugSendNativeEvent');
        expect(capturedCall?.arguments, {
          'type': PushNotificationType.opened,
          'server_url': 'https://mm.example.com',
          'channel_id': 'channel-debug',
        });
      },
    );
  });

  group('Channel constants', () {
    test('notification and action channel names are preserved', () {
      expect(
        MattermostPushPlugin.notificationChannelName,
        'com.tokilabs.mattermost/notifications',
      );
      expect(
        MattermostPushPlugin.actionChannelName,
        'com.tokilabs.mattermost/notification_actions',
      );
    });
  });
}