mirrored_repositories/awesome-flutter/examples/flutterfire/packages/firebase_auth/firebase_auth/example
// Copyright 2020 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

// @dart=2.9

import 'package:firebase_auth/firebase_auth.dart';
import 'package:firebase_core/firebase_core.dart';
import 'package:flutter/material.dart';
import 'package:flutter_signin_button/button_builder.dart';

import './register_page.dart';
import './signin_page.dart';

// Requires that the Firebase Auth emulator is running locally
// e.g via `melos run firebase:emulator`.
Future<void> main() async {
  WidgetsFlutterBinding.ensureInitialized();
  await Firebase.initializeApp();
  await FirebaseAuth.instance.useAuthEmulator('localhost', 9099);
  runApp(AuthExampleApp());
}

/// The entry point of the application.
///
/// Returns a [MaterialApp].
class AuthExampleApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Firebase Example App',
      theme: ThemeData.dark(),
      home: Scaffold(
        body: AuthTypeSelector(),
      ),
    );
  }
}

/// Provides a UI to select a authentication type page
class AuthTypeSelector extends StatelessWidget {
  // Navigates to a new page
  void _pushPage(BuildContext context, Widget page) {
    Navigator.of(context) /*!*/ .push(
      MaterialPageRoute<void>(builder: (_) => page),
    );
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('Firebase Example App'),
      ),
      body: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: <Widget>[
          Container(
            padding: const EdgeInsets.all(16),
            alignment: Alignment.center,
            child: SignInButtonBuilder(
              icon: Icons.person_add,
              backgroundColor: Colors.indigo,
              text: 'Registration',
              onPressed: () => _pushPage(context, RegisterPage()),
            ),
          ),
          Container(
            padding: const EdgeInsets.all(16),
            alignment: Alignment.center,
            child: SignInButtonBuilder(
              icon: Icons.verified_user,
              backgroundColor: Colors.orange,
              text: 'Sign In',
              onPressed: () => _pushPage(context, SignInPage()),
            ),
          ),
        ],
      ),
    );
  }
}
