import 'dart:convert';
import 'package:jaguar_serializer/jaguar_serializer.dart';
import 'package:flutter/material.dart';
import 'package:http/http.dart' as http;
void main() => runApp(App());
List<int> welcomeFromJson(String str) => new List<int>.from(json.decode(str).map((x) => x));

String welcomeToJson(List<int> data) => json.encode(new List<dynamic>.from(data.map((x) => x)));

class App extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: HomePage(),
    );
  }
}

class HomePage extends StatefulWidget {
  @override
  _HomePageState createState() => _HomePageState();
}

class _HomePageState extends State<HomePage> {
  //Note _currentUser;
  Future<List<int>> fetchNotes() async {
    final String Uri = 'https://fbayub.000webhostapp.com/d.json';
    /*https://fbayub.000webhostapp.com/nim.json
    https://raw.githubusercontent.com/boriszv/json/master/random_example.json
    https://fbayub.000webhostapp.com/d.json
    https://jsonplaceholder.typicode.com/users*/
    var response = await http.get(Uri);
    if (response.statusCode == 200) {
      final items = json.decode(response.body).cast<Map<String, dynamic>>();
      List<int> conith = new List();
      conith = new List<int>.from(items.map((x)=>x));
        return conith;
      //throw Exception('Failed to load internet');
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Flutter listview with json'),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          mainAxisSize: MainAxisSize.max,
          children: <Widget>[
            FutureBuilder<List<int>>(
                future: fetchNotes(),
                builder:
                    (BuildContext context, AsyncSnapshot<List<int>> snapshot) {
                  if (!snapshot.hasData) return CircularProgressIndicator();
                  return DropdownButton<int>(
                    items: snapshot.data
                        .map((user) => DropdownMenuItem<int>(
                              child:  Text(user.toString()),
                              value:  user,
                            ))
                        .toList(),
                    onChanged: (int value) {
                      setState(() {});
                    },
                    isExpanded: false,
                    //value: ???,
                    hint: Text('Select User'),
                  );
                }),
            SizedBox(height: 20.0),
           /* ??? != null
                ? Text("NIM : " +???)
                : Text("No NIM selected"),*/
          ],
        ),
      ),
    );
  }
}

/*class Note {
  int id;
  String name;
  String username;
  String email;

  Note(this.id, this.name,this.username, this.email);

  Note.fromJson(Map<String, dynamic> json) {
    id = json['id'];
    name = json['name'];
      email= json['email'];
      username= json['username'];
  }
}*/