import 'package:geolocator/geolocator.dart';

import '../../homes/services/location_platform_service.dart';
import '../models/geofence_system_state.dart';

abstract class GeofenceSystemStatusService {
  Future<GeofenceSystemState> inspect({
    required bool hasActiveHome,
    required bool hasCoordinates,
  });
}

class DeviceGeofenceSystemStatusService implements GeofenceSystemStatusService {
  final LocationPlatformService locationPlatformService;

  DeviceGeofenceSystemStatusService({required this.locationPlatformService});

  @override
  Future<GeofenceSystemState> inspect({
    required bool hasActiveHome,
    required bool hasCoordinates,
  }) async {
    if (!hasActiveHome) {
      return const GeofenceSystemState(GeofenceSystemIssue.noActiveHome);
    }
    if (!hasCoordinates) {
      return const GeofenceSystemState(GeofenceSystemIssue.missingCoordinates);
    }
    if (!await locationPlatformService.isLocationServiceEnabled()) {
      return const GeofenceSystemState(
        GeofenceSystemIssue.locationServicesDisabled,
      );
    }

    final permission = await locationPlatformService.checkPermission();
    return switch (permission) {
      LocationPermission.denied => const GeofenceSystemState(
        GeofenceSystemIssue.permissionDenied,
      ),
      LocationPermission.deniedForever => const GeofenceSystemState(
        GeofenceSystemIssue.permissionDeniedForever,
      ),
      LocationPermission.whileInUse => const GeofenceSystemState(
        GeofenceSystemIssue.backgroundPermissionRequired,
      ),
      LocationPermission.always => const GeofenceSystemState(
        GeofenceSystemIssue.ready,
      ),
      _ => const GeofenceSystemState(GeofenceSystemIssue.permissionDenied),
    };
  }
}