import 'dart:convert';
import 'dart:io';
import 'package:shelf/shelf.dart';
import 'package:shelf/shelf_io.dart' as io;
import 'package:shelf_router/shelf_router.dart';

class ReceiverServer {
  HttpServer? _server;
  final Function(Map<String, dynamic>) onPlayRequest;

  ReceiverServer({required this.onPlayRequest});

  Future<int> start() async {
    final router = Router();

    router.post('/play', (Request request) async {
      final payload = await request.readAsString();
      try {
        final data = jsonDecode(payload) as Map<String, dynamic>;
        onPlayRequest(data);
        return Response.ok(jsonEncode({'status': 'success'}));
      } catch (e) {
        return Response.badRequest(body: jsonEncode({'error': 'Invalid JSON'}));
      }
    });

    router.get('/health', (Request request) {
      return Response.ok(jsonEncode({'status': 'ok'}));
    });

    _server = await io.serve(router, InternetAddress.anyIPv4, 0); // Port 0 for auto-assign or fixed port
    print('Receiver Server running on port ${_server!.port}');
    return _server!.port;
  }

  Future<void> stop() async {
    await _server?.close();
    _server = null;
  }

  String? get ipAddress {
    // Note: This is a simplified way to get local IP. 
    // In a real app, you might want to filter for the Wi-Fi interface.
    return 'Local IP'; 
  }
}