import 'dart:convert';

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

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Cliente REST',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: MyHomePage(title: 'Cliente REST'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  MyHomePage({Key key, this.title}) : super(key: key);

  final String title;

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

class _MyHomePageState extends State<MyHomePage> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: Center(
          child: FutureBuilder<Persona>(
        future: leerPersona(),
        builder: (context, snapshot) {
          if (snapshot.hasData) {
            return Text(snapshot.data.nombre);
          } else if (snapshot.hasError) {
            return Text("${snapshot.error}");
          }
          return CircularProgressIndicator();
        },
      )),
    );
  }

  Future<Persona> leerPersona() async {
    final response = await http.get('http://your_ip:3000/persona');

    if (response.statusCode == 200) {
      return Persona.fromJson(json.decode(response.body));
    } else {
      throw Exception('Falló al recuperar la persona');
    }
  }
}

class Persona {
  int id;
  String nombre;

  Persona({int id, String nombre}) {
    this.id = id;
    this.nombre = nombre;
  }

  factory Persona.fromJson(Map<String, dynamic> json) {
    return Persona(id: json['id'], nombre: json['nombre']);
  }
}