import 'dart:io';
import 'package:flutter/material.dart';
import 'package:flutter_bloc/flutter_bloc.dart';
import 'package:flutter_secure_storage/flutter_secure_storage.dart';
import 'package:flutter_svg/flutter_svg.dart';
import 'package:onesignal_flutter/onesignal_flutter.dart';
import 'package:permission_handler/permission_handler.dart';
import 'package:share_plus/share_plus.dart';
import 'package:syncrow_app/features/app_layout/model/space_model.dart';
import 'package:syncrow_app/features/app_layout/view/widgets/app_bar_home_dropdown.dart';
import 'package:syncrow_app/features/auth/model/user_model.dart';
import 'package:syncrow_app/features/dashboard/view/dashboard_view.dart';
import 'package:syncrow_app/features/devices/bloc/ceiling_bloc/ceiling_sensor_state.dart';
import 'package:syncrow_app/features/devices/bloc/devices_cubit.dart';
import 'package:syncrow_app/features/devices/model/device_model.dart';
import 'package:syncrow_app/features/devices/model/room_model.dart';
import 'package:syncrow_app/features/devices/model/smart_door_model.dart';
import 'package:syncrow_app/features/devices/model/status_model.dart';
import 'package:syncrow_app/features/devices/view/widgets/curtains/curtain_view.dart';
import 'package:syncrow_app/features/devices/view/widgets/devices_view_body.dart';
import 'package:syncrow_app/features/menu/view/menu_view.dart';
import 'package:syncrow_app/features/scene/view/scene_view.dart';
import 'package:syncrow_app/generated/assets.dart';
import 'package:syncrow_app/navigation/navigation_service.dart';
import 'package:syncrow_app/services/api/devices_api.dart';
import 'package:syncrow_app/services/api/spaces_api.dart';
import 'package:syncrow_app/utils/helpers/custom_page_route.dart';
import 'package:syncrow_app/utils/helpers/snack_bar.dart';
import 'package:syncrow_app/utils/resource_manager/color_manager.dart';
import 'package:syncrow_app/utils/resource_manager/constants.dart';

part 'home_state.dart';

class HomeCubit extends Cubit<HomeState> {
  HomeCubit._() : super(HomeInitial()) {
    checkIfNotificationPermissionGranted();
    if (selectedSpace == null) {
      fetchUnitsByUserId();
      // .then((value) {
      //   if (selectedSpace != null) {
      //     fetchRoomsByUnitId(selectedSpace!);
      //   }
      // });
    }
  }

  static HomeCubit? _instance;
  static HomeCubit getInstance() {
    // If an instance already exists, return it
    _instance ??= HomeCubit._();
    return _instance!;
  }

  void emitSafe(HomeState newState) {
    final cubit = this;
    if (!cubit.isClosed) {
      cubit.emit(newState);
    }
  }

  @override
  Future<void> close() {
    _instance = null;
    selectedSpace = null;
    selectedRoom = null;
    pageIndex = 0;
    OneSignal.User.pushSubscription.removeObserver((stateChanges) => oneSignalSubscriptionObserver);
    OneSignal.Notifications.removePermissionObserver((permission) => oneSignalPermissionObserver);
    OneSignal.Notifications.removeClickListener((event) => oneSignalClickListenerObserver);
    return super.close();
  }

  static HomeCubit get(context) => BlocProvider.of(context);

  List<SpaceModel>? spaces;

  SpaceModel? selectedSpace;

  RoomModel? selectedRoom;

  PageController devicesPageController = PageController();

  PageController roomsPageController = PageController();

  var duration = const Duration(milliseconds: 300);

  void oneSignalPermissionObserver;
  void oneSignalSubscriptionObserver;
  void oneSignalClickListenerObserver;

  // selectSpace(SpaceModel space) async {
  //   selectedSpace = space;
  //   emit(SpaceSelected(space));
  // }

  checkIfNotificationPermissionGranted() async {
    try {
      OneSignal.initialize('762350c9-1e5d-4d95-a648-16d4dc8a25e1');

      //Show native push notification dialog
      if (Platform.isIOS) {
        await OneSignal.Notifications.permissionNative();
      } else {
        await OneSignal.Notifications.requestPermission(true);
      }

      if (await Permission.notification.isGranted == false) {
        return;
      }

      var userUuid = await const FlutterSecureStorage().read(key: UserModel.userUuidKey) ?? '';
      if (userUuid.isNotEmpty) {
        await OneSignal.login(userUuid);
      }
      //Enable push notifications
      await OneSignal.User.pushSubscription.optIn();

      //this function will be called once a user is subscribed
      oneSignalSubscriptionObserver = OneSignal.User.pushSubscription.addObserver((state) async {
        if (state.current.optedIn) {
          await _sendSubscriptionId();
        }
      });

      // Send the player id when a user allows notifications
      oneSignalPermissionObserver = OneSignal.Notifications.addPermissionObserver((state) async {
        await _sendSubscriptionId();
      });

      //check if the player id is sent, if not send it again
      await _sendSubscriptionId();

      oneSignalClickListenerObserver = OneSignal.Notifications.addClickListener((event) async {
        //Once the user clicks on the notification
      });
    } catch (err) {
      debugPrint("******* Error");
      debugPrint(err.toString());
      rethrow;
    }
  }

  _sendSubscriptionId() async {
    String? subscriptionId = OneSignal.User.pushSubscription.id ?? '';
    //TODO send the subscription id to BE
  }

  changeSelectedSpace(SpaceModel space) {
    selectedSpace = space;
    emitSafe(SpaceSelected(space));
    fetchRoomsByUnitId(space);
  }

  roomSliderPageChanged(int index) {
    devicesPageController.animateToPage(
      index,
      duration: duration,
      curve: Curves.linear,
    );

    if (index == 0) {
      unselectRoom();
    } else {
      selectedRoom = selectedSpace!.rooms![index - 1];
      emitSafe(RoomSelected(selectedRoom!));
    }
  }

  devicesPageChanged(int index) {
    roomsPageController.animateToPage(
      index,
      duration: const Duration(milliseconds: 300),
      curve: Curves.linear,
    );

    if (index <= 0) {
      unselectRoom();
    } else {
      selectedRoom = selectedSpace!.rooms![index - 1];
      emitSafe(RoomSelected(selectedRoom!));
    }
  }

  unselectRoom() {
    // selectedRoom = null;
    devicesPageController.animateToPage(
      0,
      duration: duration,
      curve: Curves.linear,
    );

    roomsPageController.animateToPage(
      0,
      duration: duration,
      curve: Curves.linear,
    );

    emitSafe(RoomUnSelected());
  }

//////////////////////////////////////// API ////////////////////////////////////////
  generateInvitation(String unitId) async {
    try {
      final invitationCode = await SpacesAPI.generateInvitationCode(unitId);
      if (invitationCode.isNotEmpty) {
        Share.share('The invitation code is $invitationCode');
        CustomSnackBar.displaySnackBar(
            'Invitation code generated successfully the code is: $invitationCode');
      } else {
        CustomSnackBar.displaySnackBar('Please try again!');
      }
    } catch (failure) {
      CustomSnackBar.displaySnackBar('Something went wrong');
      return;
    }
  }

  Future<bool> joinAUnit(String code) async {
    try {
      var uuid = await const FlutterSecureStorage().read(key: UserModel.userUuidKey) ?? '';
      Map<String, String> body = {'userUuid': uuid, 'inviteCode': code};

      final success = await SpacesAPI.joinUnit(body);
      if (success) {
        await fetchUnitsByUserId();
        CustomSnackBar.displaySnackBar('Done successfully');
      }
      return true;
    } catch (failure) {
      CustomSnackBar.displaySnackBar('Something went wrong');
      return false;
    }
  }

  fetchUnitsByUserId() async {
    emitSafe(GetSpacesLoading());
    try {
      spaces = await SpacesAPI.getUnitsByUserId();
    } catch (failure) {
      emitSafe(GetSpacesError("No units found"));
      return;
    }

    if (spaces != null && spaces!.isNotEmpty) {
      selectedSpace = spaces!.first;
      await fetchRoomsByUnitId(selectedSpace!);
      emitSafe(GetSpacesSuccess(spaces!));
    } else {
      emitSafe(GetSpacesError("No spaces found"));
    }
  }

  fetchRoomsByUnitId(SpaceModel space) async {
    emitSafe(GetSpaceRoomsLoading());
    try {
      space.rooms = await SpacesAPI.getRoomsBySpaceId(space.id!);
    } catch (failure) {
      emitSafe(GetSpaceRoomsError(failure.toString()));
      return;
    }
    if (space.rooms != null && space.rooms!.isNotEmpty) {
      emitSafe(GetSpaceRoomsSuccess(space.rooms!));
    } else {
      emitSafe(GetSpaceRoomsError("No rooms found"));
    }
  }

  /////////////////////////////////////// Nav ///////////////////////////////////////

  static int pageIndex = 0;

  static Map<String, List<Widget>> appBarActions = {
    'Dashboard': [
      IconButton(
        icon: const Icon(
          Icons.add,
          size: 25,
        ),
        style: ButtonStyle(
          foregroundColor: WidgetStateProperty.all(ColorsManager.textPrimaryColor),
        ),
        onPressed: () {
          Navigator.push(
            NavigationService.navigatorKey.currentContext!,
            CustomPageRoute(
              builder: (context) => CurtainView(
                curtain: DeviceModel(
                  name: "Curtain",
                  status: [StatusModel(code: "awd", value: 1)],
                  productType: DeviceType.Curtain,
                ),
              ),
            ),
          );
        },
      ),
    ],
    'Devices': [
      IconButton(
        icon: const Icon(
          Icons.add,
          size: 25,
        ),
        style: ButtonStyle(
          foregroundColor: WidgetStateProperty.all(ColorsManager.textPrimaryColor),
        ),
        onPressed: () {},
      ),
      IconButton(
        icon: const Icon(
          Icons.more_vert,
          size: 25,
        ),
        style: ButtonStyle(
          foregroundColor: WidgetStateProperty.all(ColorsManager.textPrimaryColor),
        ),
        onPressed: () {},
      ),
    ],
    'Routine': [
      // IconButton(
      //   icon: Image.asset(
      //     Assets.assetsIconsFilter,
      //     height: 20,
      //     width: 20,
      //   ),
      //   onPressed: () {},
      // ),
      IconButton(
        icon: const Icon(
          Icons.add,
          size: 25,
        ),
        style: ButtonStyle(
          foregroundColor: MaterialStateProperty.all(ColorsManager.textPrimaryColor),
        ),
        onPressed: () {},
      ),
      IconButton(
        icon: const Icon(
          Icons.more_vert,
          size: 25,
        ),
        style: ButtonStyle(
          foregroundColor: MaterialStateProperty.all(ColorsManager.textPrimaryColor),
        ),
        onPressed: () {},
      ),
    ],
    'Menu': [
      IconButton(
        icon: SvgPicture.asset(
          Assets.assetsIconsScan,
          height: 20,
          width: 20,
        ),
        onPressed: () {},
      ),
    ],
  };

  static Map<String, Widget?> appBarLeading = {
    'Dashboard': const AppBarHomeDropdown(),
    'Devices': const AppBarHomeDropdown(),
    'Routine': const AppBarHomeDropdown(),
    'Menu': Padding(
      padding: const EdgeInsets.only(left: 15),
      child: Image.asset(
        Assets.assetsImagesLogoHorizontal,
        height: 15,
        width: 100,
        fit: BoxFit.scaleDown,
      ),
    ),
  };

  static var bottomNavItems = [
    defaultBottomNavBarItem(icon: Assets.assetsIconsDashboard, label: 'Dashboard'),
    // defaultBottomNavBarItem(icon: Assets.assetsIconslayout, label: 'Layout'),
    defaultBottomNavBarItem(icon: Assets.assetsIconsDevices, label: 'Devices'),
    defaultBottomNavBarItem(icon: Assets.assetsIconsRoutines, label: 'Routine'),
    defaultBottomNavBarItem(icon: Assets.assetsIconsMenu, label: 'Menu'),
  ];

  final List<Widget> pages = [
    const DashboardView(),
    // const LayoutPage(),
    BlocProvider(
      create: (context) => DevicesCubit.getInstance(),
      child: const DevicesViewBody(),
    ),
    const SceneView(),
    const MenuView(),
  ];

  void updatePageIndex(int index) {
    pageIndex = index;

    emitSafe(NavChangePage());
  }

  void updateDevice(String deviceId) async {
    try {
      final response = await DevicesAPI.firmwareDevice(
          deviceId:deviceId ,
          firmwareVersion: '0'
      );
      if (response['success'] ?? false) {
        CustomSnackBar.displaySnackBar('Update Success');
      }
    } catch (_) {}
  }

}

BottomNavigationBarItem defaultBottomNavBarItem({required String icon, required String label}) {
  return BottomNavigationBarItem(
    icon: SvgPicture.asset(icon),
    activeIcon: SvgPicture.asset(
      icon.replaceAll('.svg', '-fill.svg'),
      colorFilter: const ColorFilter.mode(
        ColorsManager.primaryColor,
        BlendMode.srcIn,
      ),
    ),
    label: label,
  );
}