import 'package:cloud_firestore/cloud_firestore.dart';
import '../constants.dart';
import '../utils/math.dart';

class MyLocation {
  final String street;
  final String country;

  /// DE: Bundesland
  final String? administrativeArea;

  /// City
  final String locality;

  /// DE: Stadtteil
  final String? subLocality;
  final String? postalCode;
  final double? latitude;
  final double? longitude;

  MyLocation({
    required this.street,
    required this.country,
    required this.administrativeArea,
    required this.locality,
    required this.subLocality,
    required this.postalCode,
    required this.latitude,
    required this.longitude,
  });

  factory MyLocation.fromDocument(DocumentSnapshot doc) {
    Map<String, dynamic> data = doc.data() as Map<String, dynamic>;
    return MyLocation(
      street: data[Constants.dbFieldLocationStreet] ?? '',
      country: data[Constants.dbFieldLocationCountry] ?? '',
      administrativeArea: data[Constants.dbFieldLocationArea],
      locality: data[Constants.dbFieldLocationLocality] ?? '',
      subLocality: data[Constants.dbFieldLocationSubLocality],
      postalCode: data[Constants.dbFieldLocationPostalCode],
      latitude: (data[Constants.dbFieldLocationLatitude] as num?)?.toDouble(),
      longitude: (data[Constants.dbFieldLocationLongitude] as num?)?.toDouble(),
    );
  }

  // convert to a map
  Map<String, dynamic> toMap() {
    return {
      Constants.dbFieldLocationStreet: street,
      Constants.dbFieldLocationCountry: country,
      Constants.dbFieldLocationArea: administrativeArea,
      Constants.dbFieldLocationLocality: locality,
      Constants.dbFieldLocationSubLocality: subLocality,
      Constants.dbFieldLocationPostalCode: postalCode,
      Constants.dbFieldLocationLatitude: latitude,
      Constants.dbFieldLocationLongitude: longitude,
    };
  }

  /// Returns: locality, country. In case of an error: latitude, longitude.
  String toStringDegree() {
    try {
      String latResult = convertDecimalToDMS(latitude!, isLatitude: true);
      String longResult = convertDecimalToDMS(longitude!, isLatitude: false);
      return '$latResult, $longResult';
    } catch (e) {
      // on error return origin values
      return '$latitude, $longitude';
    }
  }

  /// Returns the location formatted as 'locality, country'
  /// if both values are present or an empty string if both values are empty.
  @override
  String toString() {
    if (locality.isNotEmpty && country.isNotEmpty) {
      return '$locality, $country';
    } else if (country.isNotEmpty) {
      return country;
    } else if (locality.isNotEmpty) {
      return locality;
    }
    return '';
  }

  @override
  int get hashCode => Object.hash(latitude, longitude);

  @override
  bool operator ==(Object other) =>
      other is MyLocation &&
      latitude == other.latitude &&
      longitude == other.longitude;
}