import 'package:flutter/services.dart';

/// Bridge verso engine nativo Android (CameraX + RootEncoder).
class StreamingChannel {
  StreamingChannel._();

  static const MethodChannel _channel =
      MethodChannel('com.matchlivetv.match_live_tv/streaming');

  static const EventChannel _metricsChannel =
      EventChannel('com.matchlivetv.match_live_tv/streaming_events');

  static Future<void> startPreview() async {
    await _channel.invokeMethod('startPreview');
  }

  static Future<bool> bindPreview() async {
    final ok = await _channel.invokeMethod<bool>('bindPreview');
    return ok ?? false;
  }

  static Future<void> stopPreview() async {
    await _channel.invokeMethod('stopPreview');
  }

  static Future<void> startStream({
    required String rtmpUrl,
    int targetBitrate = 2500000,
    int targetFps = 30,
  }) async {
    await _channel.invokeMethod('startStream', {
      'rtmpUrl': rtmpUrl,
      'videoBitrate': targetBitrate,
      'fps': targetFps,
    });
  }

  /// Ripresa dopo pausa: resetta stati RTMP residui (CONNECTING/RECONNECTING).
  static Future<void> resumeStream({
    required String rtmpUrl,
    int targetBitrate = 2500000,
    int targetFps = 30,
  }) async {
    await _channel.invokeMethod('resumeStream', {
      'rtmpUrl': rtmpUrl,
      'videoBitrate': targetBitrate,
      'fps': targetFps,
    });
  }

  static Future<void> stopStream() async {
    await _channel.invokeMethod('stopStream');
  }

  static Future<void> pauseStream() async {
    await _channel.invokeMethod('pauseStream');
  }

  static Future<Map<String, dynamic>?> getMetrics() async {
    final result =
        await _channel.invokeMethod<Map<dynamic, dynamic>>('getMetrics');
    return result?.map((key, value) => MapEntry(key.toString(), value));
  }

  static EventChannel get metricsStream => _metricsChannel;
}