import 'dart:convert';
import 'dart:core';

import 'package:flutter/material.dart';
// import 'package:lottie/lottie.dart';
// import 'package:shared_preferences/shared_preferences.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: 'Flutter Demo',
      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.blue,
      ),
      home: const MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

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

  // This widget is the home page of your application. It is stateful, meaning
  // that it has a State object (defined below) that contains fields that affect
  // how it looks.

  // This class is the configuration for the state. It holds the values (in this
  // case the title) provided by the parent (in this case the App widget) and
  // used by the build method of the State. Fields in a Widget subclass are
  // always marked "final".

  final String title;

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  int _counter = 0;
  String _mess = '';
  Map<String, dynamic>? jj;
  // late final SharedPreferences _pers ;
  String mData = '{"main_car_series":0,"birthday":931968000,"s_id":0,"real_person":1,"gender":2,"nick_name":"111","cash":1302.62,"flags":"1,2,5","id":27,"head":482,"tencent_appid":14006193}';

  late TextEditingController _txtCtr;
  late FocusNode _focus;

  @override
  void initState() {
    super.initState();
    _txtCtr = TextEditingController();
    _focus = FocusNode();
    _initData();
  }

  _initData() async {
    // _pers = await SharedPreferences.getInstance();
   
    // jj = mess;
    _mess = jj == null? "null" : jj!['s_id'].toString();

    // List<String> dd = bb.split('：');
    // if(dd.length > 1){
    //    _counter = int.parse(dd[1]);
    // }
   
    setState(() {
      
    });
  }


  // Map<String, dynamic>? get mess{
  //   String? str;
  //   str = _pers.getString("MESS_DATA");
  //   Map<String, dynamic>? json;
  //   if(str == null || str.isEmpty){
  //     str = mData;
  //   }
  //   json = jsonDecode(str);
  //   // ignore: avoid_print
  //   print('messdata====='+str);
  //   return json;
  // }

  void _incrementCounter() {
    setState(() {
      // This call to setState tells the Flutter framework that something has
      // changed in this State, which causes it to rerun the build method below
      // so that the display can reflect the updated values. If we changed
      // _counter without calling setState(), then the build method would not be
      // called again, and so nothing would appear to happen.
      _counter++;
      _focus.unfocus();
      _mess = '计数：'+_counter.toString();
      jj!['s_id'] = _counter;
      // _pers.setString("MESS_DATA", _mess).then((p){
      //   // ignore: avoid_print
      //   print('add====='+mess!);
      // });
      // saveData();
    });
  }

  // Future<void> saveData() async {
  //   await _pers.setString("MESS_DATA", jsonEncode(jj));
  // }
  // Future<void> removeData() async {
  //   await _pers.remove("MESS_DATA");
  // }

  void clearData(){
    // _pers.remove("MESS_DATA").then((p){
      
    // });
    // removeData();
    // setState(() {
      
    // });
  }

  @override
  Widget build(BuildContext context) {
    // This method is rerun every time setState is called, for instance as done
    // by the _incrementCounter method above.
    //
    // The Flutter framework has been optimized to make rerunning build methods
    // fast, so that you can just rebuild anything that needs updating rather
    // than having to individually change instances of widgets.
    return Scaffold(
      appBar: AppBar(
        // Here we take the value from the MyHomePage object that was created by
        // the App.build method, and use it to set our appbar title.
        title: Text(widget.title),
      ),
      body: Center(
        // Center is a layout widget. It takes a single child and positions it
        // in the middle of the parent.
        child: Column(
          // Column is also a layout widget. It takes a list of children and
          // arranges them vertically. By default, it sizes itself to fit its
          // children horizontally, and tries to be as tall as its parent.
          //
          // Invoke "debug painting" (press "p" in the console, choose the
          // "Toggle Debug Paint" action from the Flutter Inspector in Android
          // Studio, or the "Toggle Debug Paint" command in Visual Studio Code)
          // to see the wireframe for each widget.
          //
          // Column has various properties to control how it sizes itself and
          // how it positions its children. Here we use mainAxisAlignment to
          // center the children vertically; the main axis here is the vertical
          // axis because Columns are vertical (the cross axis would be
          // horizontal).
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            const Text(
              'You have clicked hhhh the button this many times:',
            ),
            Text(
              '$_counter',
              style: Theme.of(context).textTheme.headline4,
            ),
            Text(
              _mess,
              style: Theme.of(context).textTheme.headline4,
            ),
            FloatingActionButton(
              onPressed: _incrementCounter, 
              child: const Icon(Icons.add),
            ),
            // Lottie.asset("assets/pot.json",width: 500,height: 500,repeat: true),
            TextField(controller: _txtCtr,onTap: () {
              // // _focus.requestFocus();
              // await Future.delayed(const Duration(milliseconds: 500));
              // _focus.unfocus();
              // Future.delayed(const Duration(milliseconds: 1000),(){
              //   _focus.unfocus();
              // });
              // Future.delayed(const Duration(milliseconds: 1000),(){
              //   _focus.requestFocus();
              // });
              // if(_txtCtr.text.isEmpty){
              //   _txtCtr.text = "1";
              // }
              // if(_txtCtr.text == "1"){
              //   _txtCtr.text = '';
              // }
            },onChanged: (value) {
              // if(_txtCtr.text.isEmpty){
              //   _txtCtr.text = "m";
              // }
              _mess = _txtCtr.text;
              setState(() {
                
              });
            },focusNode: _focus,),
          ],
        ),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: clearData,
        tooltip: 'Increment',
        child: const Icon(Icons.remove),
      ), // This trailing comma makes auto-formatting nicer for build methods.
      
    );
  }
}