Вход

import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:plantual_1/ui/auth/signUpScreen.dart';
import 'package:plantual_1/utils/utils.dart';
import 'package:plantual_1/widgets/round_button.dart';
import 'package:firebase_auth/firebase_auth.dart';

import '../../scenes/home.dart';

class signInScreen extends StatefulWidget {
  const signInScreen({super.key});

  @override
  State<signInScreen> createState() => _signInScreenState();
}

class _signInScreenState extends State<signInScreen> {

  bool loading = false;
  final _formKey = GlobalKey<FormState>();
  final emailController = TextEditingController();
  final passwordController = TextEditingController();

  final _auth = FirebaseAuth.instance;

  @override
  void dispose(){
    super.dispose();
    emailController.dispose();
    passwordController.dispose();
  }

  void login(){
    setState(() {
      loading = true;
    });
    _auth.signInWithEmailAndPassword(
        email: emailController.text.toString(),
        password: passwordController.text.toString()).then((value){
          utilsDone().toastMessage(value.user!.email.toString());
          Navigator.push(context,
              MaterialPageRoute(builder: (context) => Home())
          );
          setState(() {
            loading = false;
          });
    }).onError((error, stackTrace){
      if(error.toString() == '[firebase_auth/invalid-email] The email address is badly formatted.') {
        utilsError().toastMessage('Почта введена неправильно');
      };
      if(error.toString() == '[firebase_auth/invalid-credential] The supplied auth credential is incorrect, malformed or has expired.') {
        utilsError().toastMessage('Неверные данные для входа');
      };
      debugPrint(error.toString());
      setState(() {
        loading = false;
      });
    });
  }

  @override
  Widget build(BuildContext context) {
    return WillPopScope(
      onWillPop: ()async{
        SystemNavigator.pop();
        return true;
      },
      child: Scaffold(
        appBar: AppBar(
          backgroundColor: Colors.lightGreen,
          automaticallyImplyLeading: false,
          centerTitle: true,
          title: Text('Вход', style: TextStyle(color: Colors.white)),
        ),
        body: Padding(
          padding: const EdgeInsets.symmetric(horizontal: 20),
          child: Column(
            mainAxisAlignment: MainAxisAlignment.center,
            crossAxisAlignment: CrossAxisAlignment.center,
            children: [
              Form(
                key: _formKey,
                child: Column(
                  children: [
                    TextFormField(
                      keyboardType: TextInputType.emailAddress,
                      controller: emailController,
                      decoration: const InputDecoration(
                          hintText: 'Почта',
                          helperText: 'Введите эл.почту',
                          prefixIcon: Icon(Icons.alternate_email)
                      ),
                      validator: (value) {
                        if(value!.isEmpty){
                          return 'Введите почту';
                        }
                        return null;
                      },
                    ),
                    const SizedBox(height: 10),
                    TextFormField(
                      keyboardType: TextInputType.text,
                      obscureText: true,
                      controller: passwordController,
                      decoration: const InputDecoration(
                          hintText: 'Пароль',
                          helperText: 'Введите пароль',
                          prefixIcon: Icon(Icons.lock_open)
                      ),
                      validator: (value) {
                        if(value!.isEmpty){
                          return 'Введите пароль';
                        }
                        return null;
                      },
                    ),
                  ],
                ),
              ),
              const SizedBox(height: 30),
              roundButton(
                title: 'Войти',
                loading: loading,
                onTap: () {
                if(_formKey.currentState!.validate()){
                  login();
                }
              },),
              const SizedBox(height: 10),
              Row(
                mainAxisAlignment: MainAxisAlignment.center,
                children: [
                  Text('Нет аккаунта?'),
                  TextButton(
                      onPressed: (){
                        Navigator.push(context,
                            MaterialPageRoute(builder: (context) => signUpScreen())
                        );
                      },
                      child: Text('Зарегистрироваться'))
                ],
              )
            ],
          ),
        ),
      ),
    );
  }
}