syncrow-web/lib/pages/device_managment/ac/bloc/ac_bloc.dart

import 'dart:async';
import 'package:dio/dio.dart';
import 'package:flutter/material.dart';
import 'package:flutter_bloc/flutter_bloc.dart';
import 'package:syncrow_web/pages/device_managment/all_devices/models/device_status.dart';
import 'package:syncrow_web/pages/device_managment/ac/bloc/ac_event.dart';
import 'package:syncrow_web/pages/device_managment/ac/bloc/ac_state.dart';
import 'package:syncrow_web/pages/device_managment/ac/model/ac_model.dart';
import 'package:syncrow_web/services/devices_mang_api.dart';

class AcBloc extends Bloc<AcsEvent, AcsState> {
  late AcStatusModel deviceStatus;
  final String deviceId;
  Timer? _timer;

  AcBloc({required this.deviceId}) : super(AcsInitialState()) {
    on<AcFetchDeviceStatus>(_onFetchAcStatus);
    on<AcControl>(_onAcControl);
  }

  FutureOr<void> _onFetchAcStatus(
      AcFetchDeviceStatus event, Emitter<AcsState> emit) async {
    emit(AcsLoadingState());
    try {
      final status =
          await DevicesManagementApi().getDeviceStatus(event.deviceId);
      deviceStatus = AcStatusModel.fromJson(event.deviceId, status.status);
      emit(ACStatusLoaded(deviceStatus));
    } catch (e) {
      emit(AcsFailedState(error: e.toString()));
    }
  }

  FutureOr<void> _onAcControl(AcControl event, Emitter<AcsState> emit) async {
    final oldValue = _getValueByCode(event.code);

    _updateLocalValue(event.code, event.value);

    emit(ACStatusLoaded(deviceStatus));

    await _runDebounce(
      deviceId: event.deviceId,
      code: event.code,
      value: event.value,
      oldValue: oldValue,
      emit: emit,
    );
  }

  Future<void> _runDebounce({
    required String deviceId,
    required String code,
    required dynamic value,
    required dynamic oldValue,
    required Emitter<AcsState> emit,
  }) async {
    if (_timer != null) {
      _timer!.cancel();
    }
    _timer = Timer(const Duration(seconds: 1), () async {
      try {
        final response = await DevicesManagementApi()
            .deviceControl(deviceId, Status(code: code, value: value));
        if (!response) {
          _revertValueAndEmit(deviceId, code, oldValue, emit);
        }
      } catch (e) {
        if (e is DioException && e.response != null) {
          debugPrint('Error response: ${e.response?.data}');
        }
        _revertValueAndEmit(deviceId, code, oldValue, emit);
      }
    });
  }

  void _revertValueAndEmit(
      String deviceId, String code, dynamic oldValue, Emitter<AcsState> emit) {
    _updateLocalValue(code, oldValue);
    emit(ACStatusLoaded(deviceStatus));
    emit(const AcsFailedState(error: 'Failed to control the device.'));
  }

  void _updateLocalValue(String code, dynamic value) {
    switch (code) {
      case 'switch':
        if (value is bool) {
          deviceStatus = deviceStatus.copyWith(acSwitch: value);
        }
        break;
      case 'temp_set':
        if (value is int) {
          deviceStatus = deviceStatus.copyWith(tempSet: value);
        }
        break;
      case 'mode':
        if (value is String) {
          deviceStatus = deviceStatus.copyWith(
            modeString: value,
          );
        }
        break;
      case 'level':
        if (value is String) {
          deviceStatus = deviceStatus.copyWith(
            fanSpeedsString: value,
          );
        }
        break;
      case 'child_lock':
        if (value is bool) {
          deviceStatus = deviceStatus.copyWith(childLock: value);
        }
        break;
      default:
        break;
    }
    emit(ACStatusLoaded(deviceStatus));
  }

  dynamic _getValueByCode(String code) {
    switch (code) {
      case 'switch':
        return deviceStatus.acSwitch;
      case 'temp_set':
        return deviceStatus.tempSet;
      case 'mode':
        return deviceStatus.modeString;
      case 'level':
        return deviceStatus.fanSpeedsString;
      case 'child_lock':
        return deviceStatus.childLock;
      default:
        return null;
    }
  }
}