import 'dart:async';
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/wall_sensor/bloc/event.dart';
import 'package:syncrow_web/pages/device_managment/wall_sensor/bloc/state.dart';
import 'package:syncrow_web/pages/device_managment/wall_sensor/model/wall_sensor_model.dart';
import 'package:syncrow_web/services/devices_mang_api.dart';

class WallSensorBloc extends Bloc<WallSensorEvent, WallSensorState> {
  final String deviceId;
  late WallSensorModel deviceStatus;
  Timer? _timer;

  WallSensorBloc({required this.deviceId}) : super(WallSensorInitialState()) {
    on<WallSensorFetchStatusEvent>(_fetchWallSensorStatus);
    on<WallSensorFetchBatchStatusEvent>(_fetchWallSensorBatchControl);
    on<WallSensorChangeValueEvent>(_changeValue);
    on<WallSensorBatchControlEvent>(_onBatchControl);
    on<GetDeviceReportsEvent>(_getDeviceReports);
    on<ShowDescriptionEvent>(_showDescription);
    on<BackToGridViewEvent>(_backToGridView);
  }

  void _fetchWallSensorStatus(
      WallSensorFetchStatusEvent event, Emitter<WallSensorState> emit) async {
    emit(WallSensorLoadingInitialState());
    try {
      var response = await DevicesManagementApi().getDeviceStatus(deviceId);
      deviceStatus = WallSensorModel.fromJson(response.status);
      emit(WallSensorUpdateState(wallSensorModel: deviceStatus));
      // _listenToChanges();
    } catch (e) {
      emit(WallSensorFailedState(error: e.toString()));
      return;
    }
  }

  // Fetch batch status
  FutureOr<void> _fetchWallSensorBatchControl(
      WallSensorFetchBatchStatusEvent event,
      Emitter<WallSensorState> emit) async {
    emit(WallSensorLoadingInitialState());
    try {
      var response =
          await DevicesManagementApi().getBatchStatus(event.devicesIds);
      deviceStatus = WallSensorModel.fromJson(response.status);
      emit(WallSensorUpdateState(wallSensorModel: deviceStatus));
    } catch (e) {
      emit(WallSensorFailedState(error: e.toString()));
    }
  }

  // _listenToChanges() {
  //   try {
  //     DatabaseReference ref = FirebaseDatabase.instance.ref('device-status/$deviceId');
  //     Stream<DatabaseEvent> stream = ref.onValue;

  //     stream.listen((DatabaseEvent event) {
  //       Map<dynamic, dynamic> usersMap = event.snapshot.value as Map<dynamic, dynamic>;
  //       List<StatusModel> statusList = [];

  //       usersMap['status'].forEach((element) {
  //         statusList.add(StatusModel(code: element['code'], value: element['value']));
  //       });

  //       deviceStatus = WallSensorModel.fromJson(statusList);
  //       add(WallSensorUpdatedEvent());
  //     });
  //   } catch (_) {}
  // }

  void _changeValue(
      WallSensorChangeValueEvent event, Emitter<WallSensorState> emit) async {
    emit(WallSensorLoadingNewSate(wallSensorModel: deviceStatus));
    if (event.code == 'far_detection') {
      deviceStatus.farDetection = event.value;
    } else if (event.code == 'motionless_sensitivity') {
      deviceStatus.motionlessSensitivity = event.value;
    } else if (event.code == 'motion_sensitivity_value') {
      deviceStatus.motionSensitivity = event.value;
    } else if (event.code == 'no_one_time') {
      deviceStatus.noBodyTime = event.value;
    }
    emit(WallSensorUpdateState(wallSensorModel: deviceStatus));
    await _runDeBouncer(
      deviceId: deviceId,
      code: event.code,
      value: event.value,
      isBatch: false,
      emit: emit,
    );
  }

  Future<void> _onBatchControl(
      WallSensorBatchControlEvent event, Emitter<WallSensorState> emit) async {
    emit(WallSensorLoadingNewSate(wallSensorModel: deviceStatus));
    if (event.code == 'far_detection') {
      deviceStatus.farDetection = event.value;
    } else if (event.code == 'motionless_sensitivity') {
      deviceStatus.motionlessSensitivity = event.value;
    } else if (event.code == 'motion_sensitivity_value') {
      deviceStatus.motionSensitivity = event.value;
    } else if (event.code == 'no_one_time') {
      deviceStatus.noBodyTime = event.value;
    }
    emit(WallSensorUpdateState(wallSensorModel: deviceStatus));
    await _runDeBouncer(
      deviceId: event.deviceIds,
      code: event.code,
      value: event.value,
      emit: emit,
      isBatch: true,
    );
  }

  _runDeBouncer({
    required dynamic deviceId,
    required String code,
    required dynamic value,
    required Emitter<WallSensorState> emit,
    required bool isBatch,
  }) {
    if (_timer != null) {
      _timer!.cancel();
    }
    _timer = Timer(const Duration(seconds: 1), () async {
      try {
        late bool response;
        if (isBatch) {
          response = await DevicesManagementApi()
              .deviceBatchControl(deviceId, code, value);
        } else {
          response = await DevicesManagementApi()
              .deviceControl(deviceId, Status(code: code, value: value));
        }

        if (!response) {
          add(WallSensorFetchStatusEvent());
        }
      } catch (_) {
        await Future.delayed(const Duration(milliseconds: 500));
        add(WallSensorFetchStatusEvent());
      }
    });
  }

  FutureOr<void> _getDeviceReports(
      GetDeviceReportsEvent event, Emitter<WallSensorState> emit) async {
    emit(DeviceReportsLoadingState());

    try {
      await DevicesManagementApi.getDeviceReports(deviceId, event.code)
          .then((value) {
        emit(DeviceReportsState(deviceReport: value, code: event.code));
      });
    } catch (e) {
      emit(DeviceReportsFailedState(error: e.toString()));
      return;
    }
  }

  void _showDescription(
      ShowDescriptionEvent event, Emitter<WallSensorState> emit) {
    emit(WallSensorShowDescriptionState(description: event.description));
  }

  void _backToGridView(
      BackToGridViewEvent event, Emitter<WallSensorState> emit) {
    emit(WallSensorUpdateState(wallSensorModel: deviceStatus));
  }
}