import 'package:flutter/material.dart';
import 'package:signals/signals_flutter.dart';

void main() {
  runApp(
    const MaterialApp(
      home: MyApp(),
    ),
  );
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});
  @override
  Widget build(BuildContext context) {
    print('loading ${currentLocation.value.isLoading}');
    return Scaffold(
      appBar: AppBar(
        title: const Text('Signals Example'),
        actions: [
          IconButton(
            onPressed: () {
              currentLocation.reload();
            },
            icon: const Icon(Icons.refresh),
          ),
        ],
      ),
      body: Center(
        child: currentLocation.watch(context).map(
              data: (value) => Text(value.toString()),
              error: (error) => Text(error.toString()),
              loading: () => const CircularProgressIndicator(),
            ),
      ),
    );
  }
}

final currentLocation = futureSignal<LatLng?>(() async {
  await Future.delayed(Durations.short4);
  return LatLng(40.73061, -73.9);
}, debugLabel: 'currentLocation');

class LatLng {
  final double latitude;
  final double longitude;

  LatLng(this.latitude, this.longitude);

  @override
  String toString() {
    return 'LatLng(latitude: $latitude, longitude: $longitude)';
  }

  // @override
  // bool operator ==(Object other) {
  //   if (identical(this, other)) return true;

  //   return other is LatLng &&
  //       other.latitude == latitude &&
  //       other.longitude == longitude;
  // }

  // @override
  // int get hashCode => latitude.hashCode ^ longitude.hashCode;
}