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import 'package:flutter/material.dart';

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

class MyApp extends StatelessWidget {
  const MyApp({Key? key}) : super(key: key);

  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Ignite Todo',
      theme: ThemeData(
        // This is the theme of your application.
        //
        // Try running your application with "flutter run". You'll see the
        // application has a blue toolbar. Then, without quitting the app, try
        // changing the primarySwatch below to Colors.green and then invoke
        // "hot reload" (press "r" in the console where you ran "flutter run",
        // or simply save your changes to "hot reload" in a Flutter IDE).
        // Notice that the counter didn't reset back to zero; the application
        // is not restarted.
        primarySwatch: Colors.purple,
      ),
      home: MyTodoPage(),
    );
  }
}

class MyTodoPage extends StatefulWidget {
  @override
  State<StatefulWidget> createState() => _MyTodoPageState();
}

class _MyTodoPageState extends State<MyTodoPage> {
  final items = [for (var i = 0; i < 100; i++) 'item $i'];
  final _inputTextFieldController = TextEditingController();

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text("todo"),
      ),
      body: ListView(
        children: [
          ListTile(
            title: TextField(
              decoration: const InputDecoration(hintText: 'Add new item...'),
              controller: _inputTextFieldController,
            ),
            trailing: IconButton(
              icon: const Icon(Icons.add),
              onPressed: () {
                final text = _inputTextFieldController.text;
                if (text.isEmpty) return;

                setState(() {
                  items.insert(0, text);
                });
              },
            ),
          ),
          for (var i = 0; i < items.length; i++)
            ListTile(
              title: Text(items[i]),
              trailing: IconButton(
                icon: const Icon(Icons.remove),
                onPressed: () {
                  setState(() {
                    items.removeAt(i);
                  });
                },
              ),
            ),
        ],
      ),
    );
  }
}