// Copyright 2019 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

// ignore_for_file: public_member_api_docs

import 'dart:async';

import 'package:flutter_facebook_login/flutter_facebook_login.dart';
import 'package:flutter/material.dart';
import 'package:google_sign_in/google_sign_in.dart';

GoogleSignIn _googleSignIn = GoogleSignIn(
  clientId: "1051330489903-on15f3rmq3a1830f2cb3d7ber0duueqh.apps.googleusercontent.com",
  //clientId: "1051330489903-on15f3rmq3a1830f2cb3d7ber0duueqh.apps.googleusercontent.com"
);

void main() {
  runApp(
    MaterialApp(
      title: 'Google Sign In',
      home: SignInDemo(),
    ),
  );
}

class SignInDemo extends StatefulWidget {
  @override
  State createState() => SignInDemoState();
}

class SignInDemoState extends State<SignInDemo> {
  GoogleSignInAccount _currentUser;
  String _contactText = '';

  @override
  void initState() {
    super.initState();
    _googleSignIn.onCurrentUserChanged.listen((GoogleSignInAccount account) {
      setState(() {
        _currentUser = account;
      });

      if (_currentUser != null) {
        _handleGetContact(_currentUser);
      }
    });
    _googleSignIn.signInSilently();
  }

  Future<void> _handleGetContact(GoogleSignInAccount user) async {
    setState(() {
      _contactText = "Loading contact info...";
    });
    // final http.Response response = await http.get(
    //   Uri.parse('https://people.googleapis.com/v1/people/me/connections'
    //       '?requestMask.includeField=person.names'),
    //   headers: await user.authHeaders,
    // );
    // if (response.statusCode != 200) {
    //   print("Success ------> 200");
    //   setState(() {
    //     _contactText = "People API gave a ${response.statusCode} "
    //         "response. Check logs for details.";
    //   });
    //   print('People API ${response.statusCode} response: ${response.body}');
    //   return;
    // }
    // final Map<String, dynamic> data = json.decode(response.body);
    // print("data $data");
    // final String namedContact = _pickFirstNamedContact(data);
    // setState(() {
    //   if (namedContact != null) {
    //     _contactText = "I see you know $namedContact!";
    //   } else {
    //     _contactText = "No contacts to display.";
    //   }
    // });
  }

  String _pickFirstNamedContact(Map<String, dynamic> data) {
    final List<dynamic> connections = data['connections'];
    final Map<String, dynamic> contact = connections?.firstWhere(
          (dynamic contact) => contact['names'] != null,
      orElse: () => null,
    );
    if (contact != null) {
      final Map<String, dynamic> name = contact['names'].firstWhere(
            (dynamic name) => name['displayName'] != null,
        orElse: () => null,
      );
      if (name != null) {
        return name['displayName'];
      }
    }
    return null;
  }

  Future<void> _handleSignIn() async {
    try {
      await _googleSignIn.signIn().then((value){
        print(value);
      });
    } catch (error) {
      print(error);
    }
  }

  Future<void> _handleSignOut() => _googleSignIn.disconnect();

  Widget _buildBody() {
    GoogleSignInAccount user = _currentUser;
    if (user != null) {
      return Column(
        mainAxisAlignment: MainAxisAlignment.spaceAround,
        children: <Widget>[
          ListTile(
            leading: GoogleUserCircleAvatar(
              identity: user,
            ),
            title: Text(user.displayName ?? ''),
            subtitle: Text(user.email),
          ),
          const Text("Signed in successfully."),
          Text(_contactText),
          ElevatedButton(
            child: const Text('SIGN OUT'),
            onPressed: _handleSignOut,
          ),
          ElevatedButton(
            child: const Text('REFRESH'),
            onPressed: () => _handleGetContact(user),
          ),
        ],
      );
    } else {
      return Column(
        mainAxisAlignment: MainAxisAlignment.spaceAround,
        children: <Widget>[
          const Text("You are not currently signed in."),
          ElevatedButton(
            child: const Text('SIGN IN'),
            onPressed: _handleSignIn,
          ),
        ],
      );
    }
  }


  //shower message for facebook

  static final FacebookLogin facebookSignIn = new FacebookLogin();
  String _message = 'Log in/out by pressing the buttons below.';

  Future<Null> _login() async {
    final FacebookLoginResult result =
    await facebookSignIn.logIn(['email','public_profile']);

    print(result.accessToken.token);
    switch (result.status) {
      case FacebookLoginStatus.loggedIn:
        final FacebookAccessToken accessToken = result.accessToken;
        _showMessages('''
         Logged in!
         
         Token: ${accessToken.token}
         User id: ${accessToken.userId}
         Expires: ${accessToken.expires}
         Permissions: ${accessToken.permissions}
         Declined permissions: ${accessToken.declinedPermissions}
         ''');
        break;
      case FacebookLoginStatus.cancelledByUser:
        _showMessages('Login cancelled by the user.');
        break;
      case FacebookLoginStatus.error:
        _showMessages('Something went wrong with the login process.\n'
            'Here\'s the error Facebook gave us: ${result.errorMessage}');
        break;
    }
  }

  Future<Null> _logOut() async {
    await facebookSignIn.logOut();
    _showMessages('Logged out.');
  }

  void _showMessages(String message) {
    setState(() {
      _message = message;
    });
  }

  void _showMessage(String message) {
    setState(() {
      _message = message;
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
        appBar: AppBar(
          title: const Text('Google Sign In'),
        ),
        body: ConstrainedBox(
          constraints: const BoxConstraints.expand(),
          child: Column(
            mainAxisAlignment: MainAxisAlignment.center,
            children: <Widget>[
              _buildBody(),
              Text(_message),
               RaisedButton(
                onPressed: _login,
                child:  Text('Log in'),
              ),
               RaisedButton(
                onPressed: _logOut,
                child: new Text('Logout'),
              ),
            ],
          ),
        ));
  }
}