import 'dart:async';

import 'package:flutter/material.dart';
import 'package:firebase_database/firebase_database.dart';

import '../models/ir_received_model.dart';
import '../services/firebase_service.dart';

class IrProvider extends ChangeNotifier {
  IrReceivedModel? _lastSignal;
  IrReceivedModel? get lastSignal => _lastSignal;

  StreamSubscription<DatabaseEvent>? _subscription;

  void startListening() {
    _subscription?.cancel();

    // ESP32 terbaru: saveIrReceived menggunakan setJSON (flat object) bukan pushJSON
    // Gunakan onValue untuk mendengarkan perubahan flat object di /ir_received
    _subscription = FirebaseService.irReceivedRef.onValue.listen((event) {
      if (event.snapshot.value == null) return;
      try {
        final data = Map<dynamic, dynamic>.from(event.snapshot.value as Map);
        _lastSignal = IrReceivedModel.fromMap(data);
        notifyListeners();
      } catch (_) {
        // Abaikan error parsing
      }
    });
  }

  @override
  void dispose() {
    _subscription?.cancel();
    super.dispose();
  }
}