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

import 'dart:convert';

import 'package:messenger/HomePage.dart';
import 'package:shared_preferences/shared_preferences.dart';

import 'HomeScreen.dart';

Future<void> main() async {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {

    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.red,
      ),
      home: Messenger(),
    );
  }
}

class Messenger extends StatefulWidget {
  @override
  _MessengerState createState() => _MessengerState();
}

class _MessengerState extends State<Messenger> {

  bool isLoggedIn;

  Future<void> checkLogin(BuildContext context) async{
    print('Initializing database');
    SharedPreferences prefs = await SharedPreferences.getInstance();
    isLoggedIn = prefs.getBool('isLoggedIn')??false;
    if(isLoggedIn){
      var _router = new MaterialPageRoute(
          builder: (BuildContext context) => new HomeScreen());
      Navigator.of(context).push(_router);
    }else{
      var _router = new MaterialPageRoute(
          builder: (BuildContext context) => new HomePage());
      Navigator.of(context).push(_router);
    }
  }

  @override
  void initState() {
    // TODO: implement initState
//    super.initState();
  print('Into the initstate');
    checkLogin(context);
  }

  TextEditingController _phoneNumberController = new TextEditingController();

  Future _sendMessage() async{
    print('${_phoneNumberController.text}');
    var cred =

        '****';

    var bytes = utf8.encode(cred);

    var base64Str = base64.encode(bytes);

    var url =

        'https://api.twilio.com/2010-04-01/Accounts/****/Messages.json';

    var response = await http.post(url, headers: {

      'Authorization': 'Basic ${base64Str}'

    }, body: {

      'From': '+**', //twilio number

      'To': '+91${_phoneNumberController.text}',

      'Body': 'This is a test message VOILA!!'

    });

    print('Response status: ${response.statusCode}');

    print('Response body: ${response.body}');

  }

  @override
  Widget build(BuildContext context) {

    return Scaffold(
      appBar: AppBar(title: Text("Messenger"),),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            Container(
              margin: EdgeInsets.all(10),
              child: TextFormField(
                controller: _phoneNumberController,
                keyboardType: TextInputType.number,
              ),
            ),
            Container(
              margin: EdgeInsets.all(10),
              child: RaisedButton(
                child: Text("Submit"),
                onPressed: _sendMessage,
              ),
            )
          ],
        ),
      ),
    );
  }
}