import 'dart:async';

import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:location_plugin/location_plugin.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatefulWidget {
  const MyApp({super.key});

  @override
  State<MyApp> createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  final _locationPlugin = LocationPlugin();
  String _status = 'Idle';
  String _cityStatus = 'Idle';
  Map<String, double>? _location;
  CityInfo? _cityInfo;

  @override
  void initState() {
    super.initState();
    _fetchLocation();
  }

  Future<void> _fetchLocation() async {
    setState(() {
      _status = 'Fetching location...';
    });
    try {
      final location = await _locationPlugin.getCurrentLocation();
      if (!mounted) return;
      if (location == null) {
        setState(() {
          _status = 'Location unavailable';
          _cityStatus = 'Skip city lookup';
          _cityInfo = null;
        });
        return;
      }
      setState(() {
        _location = location;
        _status = 'Success';
        _cityStatus = 'Fetching city info...';
      });
      await _fetchCityInfo(location['latitude']!, location['longitude']!);
    } on PlatformException catch (e) {
      if (!mounted) return;
      setState(() {
        _status = 'Failed: ${e.code} ${e.message ?? ''}'.trim();
        _cityStatus = 'Skip city lookup';
        _cityInfo = null;
      });
    } catch (e) {
      if (!mounted) return;
      setState(() {
        _status = 'Failed: $e';
        _cityStatus = 'Skip city lookup';
        _cityInfo = null;
      });
    }
  }

  Future<void> _fetchCityInfo(double latitude, double longitude) async {
    try {
      final info = await _locationPlugin.getCityInfo(latitude: latitude, longitude: longitude);
      if (!mounted) return;
      print(info);
      setState(() {
        _cityInfo = info;
        _cityStatus = info == null ? 'No city info' : 'Success';
      });
    } on CityInfoLookupException catch (e) {
      if (!mounted) return;
      setState(() {
        _cityInfo = null;
        _cityStatus = 'Failed: ${e.code}';
      });
    } catch (e) {
      if (!mounted) return;
      setState(() {
        _cityInfo = null;
        _cityStatus = 'Failed: $e';
      });
    }
  }

  @override
  Widget build(BuildContext context) {
    final latitude = _location?['latitude'];
    final longitude = _location?['longitude'];
    final cityCode = _cityInfo?.code;
    final region = _cityInfo?.region.join(' / ');
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: const Text('Location Plugin Example'),
        ),
        body: Padding(
          padding: const EdgeInsets.all(16),
          child: Column(
            mainAxisAlignment: MainAxisAlignment.center,
            crossAxisAlignment: CrossAxisAlignment.start,
            children: [
              Text('Status: $_status'),
              const SizedBox(height: 12),
              if (latitude != null && longitude != null)
                Text('Current position: $latitude, $longitude'),
              const SizedBox(height: 12),
              Text('City lookup: $_cityStatus'),
              if (cityCode != null)
                Text('City code: $cityCode'),
              if (region != null && region.isNotEmpty)
                Text('Region: $region'),
              const SizedBox(height: 24),
              ElevatedButton(
                onPressed: _fetchLocation,
                child: const Text('Refresh'),
              ),
              ElevatedButton(
                onPressed: (){
                  _fetchCityInfo(latitude!, longitude!);
                },
                child: const Text('Refresh'),
              ),
            ],
          ),
        ),
      ),
    );
  }
}