import 'dart:async';
import 'dart:convert';
import 'package:flutter/material.dart';
import 'package:http/http.dart' as http;

class Dog {
  final String id;
  final String name;
  final int age;

  Dog({this.id, this.name, this.age});

  // Método que cria um objeto Dog a partir de um JSON recebido.
  factory Dog.fromJson(Map<String, dynamic> json) {
    return Dog(
      id: json['id'],
      name: json['name'],
      age: json['age'],
    );
  }
}

Future<Dog> updateDog(String name, int age) async {
  final http.Response response = await http.put(
    'https://5fb5817d36e2fa00166a462d.mockapi.io/dogs/1',
    headers: <String, String>{
      'Content-Type': 'application/json; charset=UTF-8',
    },
    body: jsonEncode(<String, dynamic>{
      'name': name,
      'age': age,
    }),
  );

  if (response.statusCode == 200) {
    return Dog.fromJson(jsonDecode(response.body));
  } else {
    throw Exception('Failed to update album.');
  }
}


Future<Dog> createDog(String name, int age) async {
  final http.Response response = await http.post(
    'https://5fb5817d36e2fa00166a462d.mockapi.io/dogs',
    headers: <String, String>{
      'Content-Type': 'application/json; charset=UTF-8',
    },
    body: jsonEncode(<String, dynamic>{
      'name': name,
      'age': age,
    }),
  );

  if (response.statusCode == 201) {
    return Dog.fromJson(jsonDecode(response.body));
  } else {
    throw Exception('Falha ao criar um registro!');
  }
}

void main() => runApp(MyApp());

class MyApp extends StatefulWidget {
  MyApp({Key key}) : super(key: key);

  @override
  _MyAppState createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  Future<Dog> futureDog;
  final TextEditingController _controller = TextEditingController();

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Create Data Example',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: Scaffold(
        appBar: AppBar(
          title: Text('Create Data Example'),
        ),
        body: Container(
          alignment: Alignment.center,
          padding: const EdgeInsets.all(8.0),
          child: (futureDog == null)
              ? Column(
                  mainAxisAlignment: MainAxisAlignment.center,
                  children: <Widget>[
                    TextField(
                      controller: _controller,
                      decoration: InputDecoration(hintText: 'Digite o nome'),
                    ),
                    RaisedButton(
                      child: Text('Create Data'),
                      onPressed: () {
                        setState(() {
                          futureDog = createDog(_controller.text, 100);
                        });
                      },
                    ),
                  ],
                )
              : FutureBuilder<Dog>(
                  future: futureDog,
                  builder: (context, snapshot) {
                    if (snapshot.hasData) {
                      return Text(snapshot.data.name);
                    } else if (snapshot.hasError) {
                      return Text("${snapshot.error}");
                    }

                    return CircularProgressIndicator();
                  },
                ),
        ),
      ),
    );
  }
}