import 'dart:convert';


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


void main() {
 runApp(const MyApp());
}
class MyApp extends StatelessWidget {
 const MyApp({super.key});

 @override
 Widget build(BuildContext context) {
   return MaterialApp(
     title: 'Flutter Demo',
     theme: ThemeData(
       colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),
       useMaterial3: true,
     ),
     home: const MyHomePage(title: 'Flutter Demo Home Page'),
   );
 }
}


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

 final String title;


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


class _MyHomePageState extends State<MyHomePage> {
 int _counter = 0;
 List<String> items = [];
 final _googleSignIn = GoogleSignIn(
   scopes: [
     'https://www.googleapis.com/auth/calendar',
   ],
 );
 GoogleSignInAccount? _currentUser;
 late Map<String, dynamic> cals;


 @override
 void initState() {
   super.initState();
   _googleSignIn.onCurrentUserChanged.listen((GoogleSignInAccount? account) {
     setState(() {
       _currentUser = account;
       if (_currentUser != null) {
         _getCalendarList();
       }
     });
   });
   _googleSignIn.signIn().then((GoogleSignInAccount? account) {
     if (account != null) {
       setState(() {
         _currentUser = account;
         _getCalendarList();
       });
     }
   });
 }


 void _getCalendarList() async {
   http.Client client = http.Client();
   var headers = await _currentUser?.authHeaders;
   var resp = await client.get(Uri.parse("https://www.googleapis.com/calendar/v3/users/me/calendarList"), headers: headers);
   cals = jsonDecode(resp.body);
   for(var i=0;i<cals['items'].length;i++) {
     print(cals['items'][i]['summary']);
   }
 }


 void _incrementCounter() {
   setState(() {
     for(var i=0;i<cals['items'].length;i++) {
       print(cals['items'][i]['summary']);
     }
   });
 }


 @override
 Widget build(BuildContext context) {   
   return Scaffold(
     appBar: AppBar(       
       title: Text(widget.title),
     ),
     body: Center(
       child: Column(         
         mainAxisAlignment: MainAxisAlignment.center,
         children: <Widget>[
           const Text(
             'You have pushed the button this many times:',
           ),
           Text(
             '$_counter',
             style: Theme.of(context).textTheme.headlineMedium,
           ),
         ],
       ),
     ),
     floatingActionButton: FloatingActionButton(
       onPressed: _incrementCounter,
       tooltip: 'Increment',
       child: const Icon(Icons.add),
     ),
   );
 }
}