import 'package:flutter/material.dart';
import 'package:geolocator/geolocator.dart';
import 'package:geocoding/geocoding.dart';

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

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

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Tugas 12 Geolocator & Geocoding',
      theme: ThemeData(primarySwatch: Colors.blue),
      home: const LocationScreen(),
    );
  }
}

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

  @override
  State<LocationScreen> createState() => _LocationScreenState();
}

class _LocationScreenState extends State<LocationScreen> {
  @override
  void initState() {
    super.initState();
    jalankanTugas12();
  }

  Future<void> jalankanTugas12() async {
    print('=== MEMULAI TUGAS 12 ===');
    await handleLocationPermission();
    
    await ambilKoordinatSaatIni();
    
    await cariKoordinatTelkomUniversity();
    
    await konversiKoordinatKeAlamat();
    
    print('=== SELESAI ===');
  }

  // Fungsi pembantu untuk meminta izin lokasi perangkat
  Future<void> handleLocationPermission() async {
    bool serviceEnabled;
    LocationPermission permission;

    serviceEnabled = await Geolocator.isLocationServiceEnabled();
    if (!serviceEnabled) {
      print('Layanan lokasi dinonaktifkan. Silakan aktifkan GPS Anda.');
      return;
    }

    permission = await Geolocator.checkPermission();
    if (permission == LocationPermission.denied) {
      permission = await Geolocator.requestPermission();
      if (permission == LocationPermission.denied) {
        print('Izin lokasi ditolak.');
        return;
      }
    }
    
    if (permission == LocationPermission.deniedForever) {
      print('Izin lokasi ditolak secara permanen.');
      return;
    }
  }

  Future<void> ambilKoordinatSaatIni() async {
    try {
      Position position = await Geolocator.getCurrentPosition(
        desiredAccuracy: LocationAccuracy.high,
      );
      print('\n[1] Koordinat Perangkat Saat Ini:');
      print('Latitude: ${position.latitude}');
      print('Longitude: ${position.longitude}');
    } catch (e) {
      print('Gagal mengambil lokasi saat ini: $e');
    }
  }

  Future<void> cariKoordinatTelkomUniversity() async {
    try {
      String alamatKampus = "Telkom University, Bandung, Indonesia";
      List<Location> locations = await locationFromAddress(alamatKampus);
      
      if (locations.isNotEmpty) {
        print('\n[2] Koordinat Telkom University:');
        print('Latitude: ${locations.first.latitude}');
        print('Longitude: ${locations.first.longitude}');
      }
    } catch (e) {
      print('Gagal mencari koordinat Telkom University: $e');
    }
  }

  Future<void> konversiKoordinatKeAlamat() async {
    try {
      double targetLat = 52.2165157;
      double targetLng = 6.9437819;
      
      List<Placemark> placemarks = await placemarkFromCoordinates(targetLat, targetLng);
      
      if (placemarks.isNotEmpty) {
        Placemark tempat = placemarks.first;
        print('\n[3] Konversi Koordinat ($targetLat, $targetLng):');
        print('Nama Jalan : ${tempat.street}');
        print('Kota        : ${tempat.locality}');
        print('Negara      : ${tempat.country}');
      }
    } catch (e) {
      print('Gagal mengonversi koordinat menjadi alamat: $e');
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('Tugas 12 - Geolocator & Geocoding'),
      ),
      body: const Center(
        child: Padding(
          padding: EdgeInsets.all(16.0),
          child: Text(
            'Proses sedang berjalan.\nSilakan cek Debug Console!',
            textAlign: TextAlign.center,
            style: TextStyle(fontSize: 16),
          ),
        ),
      ),
    );
  }
}