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

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

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

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

  final String title;

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

class TokenResponse {
  final String token;

  TokenResponse({this.token});

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

class _MyHomePageState extends State<MyHomePage> {
  StreamSubscription streamSubscription;
  String sharedText;

  @override
  void initState() {
    super.initState();
    // For sharing or opening urls/text coming from outside the app while the app is in the memory
    streamSubscription =
        ReceiveSharingIntent.getTextStream().listen((String value) {
      setState(() {
        sharedText = value;
        print("Shared: $sharedText");
      });
    }, onError: (err) {
      print("getLinkStream error: $err");
    });

    // For sharing or opening urls/text coming from outside the app while the app is closed
    ReceiveSharingIntent.getInitialText().then((String value) {
      setState(() {
        sharedText = value;
        print("Shared: $sharedText");
      });
    });
  }

  @override
  void dispose() {
    super.dispose();
    streamSubscription.cancel();
  }

  Future<TokenResponse> login(String username, String password) async {
    var client = http.Client();
    try {
      final response = await http.post('http://192.168.1.241:5000/tokens',
          headers: {"Content-type": "application/json"},
          body: jsonEncode(
              <String, String>{'username': username, 'password': password}));

      if (response.statusCode == 200) {
        return TokenResponse.fromJson(jsonDecode(response.body));
      } else {
        throw Exception('Couldn\'t log in');
      }
    } finally {
      client.close();
    }
  }

  void fetchSource() {
    final tokenFuture = login('nikolaenchev@gmail.com', 'password123');
    setState(() {
      tokenFuture.then((value) {
        debugPrint(value.token);
        sharedText = value.token;
      });
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            Text('$sharedText', style: Theme.of(context).textTheme.bodyText1),
          ],
        ),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: fetchSource,
        tooltip: 'Login',
        child: Icon(Icons.account_box),
      ), // This trailing comma makes auto-formatting nicer for build methods.
    );
  }
}