siopas-istw-mobile/lib/pages/sign_in_page.dart

import 'package:flutter/material.dart';
import 'package:provider/provider.dart';
import 'package:shared_preferences/shared_preferences.dart';

import 'package:siopas/theme.dart';

import '../models/user_model.dart';
import '../providers/auth_provider.dart';
import '../widget/loading_button.dart';

class SignInPage extends StatefulWidget {
  @override
  State<SignInPage> createState() => _SignInPageState();
}

class _SignInPageState extends State<SignInPage> {
  TextEditingController emailController = TextEditingController(text: '');
  TextEditingController passwordController = TextEditingController(text: '');
  bool isLoading = false;
  bool _isPasswordVisible = false;

  @override
  Widget build(BuildContext context) {
    final bool isSmallScreen = MediaQuery.of(context).size.width < 600;
    AuthProvider authProvider = Provider.of<AuthProvider>(context);
    UserModel user = authProvider.user;

    return Scaffold(
        body: Center(
            child: isSmallScreen
                ? SingleChildScrollView(
                    reverse: true,
                    scrollDirection: Axis.vertical, // Tambahkan ini
                    child: Column(
                      mainAxisSize: MainAxisSize.min,
                      children: const [
                        _Logo(),
                        _FormContent(),
                      ],
                    ),
                  )
                : Container(
                    padding: const EdgeInsets.all(30.0),
                    constraints: const BoxConstraints(maxWidth: 800),
                    child: Row(
                      children: const [
                        Expanded(child: _Logo()),
                        Expanded(
                          child: Center(child: _FormContent()),
                        ),
                      ],
                    ),
                  )));
  }
}

class _Logo extends StatelessWidget {
  const _Logo({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    final bool isSmallScreen = MediaQuery.of(context).size.width < 600;

    return Column(
      mainAxisSize: MainAxisSize.min,
      children: [
        Container(
          margin: EdgeInsets.only(top: 30),
          child: Image.asset(
            'assets/img/logo_siopas.png',
            height: isSmallScreen ? 135 : 200,
          ),
        ),
        Padding(
          padding: const EdgeInsets.all(16.0),
          child: Text(
            "Welcome To Siopas!",
            textAlign: TextAlign.center,
            style: TextStyle(
              fontSize: isSmallScreen ? 18 : 22,
              fontWeight: semiBold,
              color: Colors.black,
            ),
          ),
        ),
      ],
    );
  }
}

class _FormContent extends StatefulWidget {
  const _FormContent({Key? key}) : super(key: key);

  @override
  State<_FormContent> createState() => __FormContentState();
}

class __FormContentState extends State<_FormContent> {
  TextEditingController emailController = TextEditingController(text: '');
  TextEditingController passwordController = TextEditingController(text: '');
  final GlobalKey<FormState> _formKey = GlobalKey<FormState>();

  bool isLoading = false;

  bool _isPasswordVisible = false;

  @override
  Widget build(BuildContext context) {
    AuthProvider authProvider = Provider.of<AuthProvider>(context);
    UserModel user = authProvider.user;

    handleSignIn() async {
      setState(() {
        isLoading = true;
      });

      if (await authProvider.login(
        email: emailController.text,
        password: passwordController.text,
      )) {
        UserModel user = authProvider.user;
        // Simpan token pengguna ke SharedPreferences
        SharedPreferences prefs = await SharedPreferences.getInstance();
        prefs.setString('token', user.token!); // Pastikan user.token tidak null
        print('token dapat login: ${user.token}');
        if (user.role_id == 2) {
          print('Berhasil login HALAMAN USER');
          Navigator.pushNamed(context, '/home');
        } else {
          print('Tidak ada informasi peran (roles) yang tersedia');
        }
      } else {
        ScaffoldMessenger.of(context).showSnackBar(
          SnackBar(
            backgroundColor: alertColor,
            content: Row(
              mainAxisAlignment: MainAxisAlignment.center,
              children: [
                Icon(
                  Icons.warning,
                  color: Colors.white,
                ),
                SizedBox(width: 8), // Jarak antara ikon dan teks
                Text(
                  'Gagal Login, Email dan Password anda salah',
                  textAlign: TextAlign.center,
                ),
              ],
            ),
          ),
        );
        Future.delayed(Duration(seconds: 3), () {
          ScaffoldMessenger.of(context).hideCurrentSnackBar();
        });
      }

      setState(() {
        isLoading = false;
      });
    }

    return Container(
      constraints: const BoxConstraints(maxWidth: 300),
      child: Form(
        key: _formKey,
        child: Column(
          mainAxisSize: MainAxisSize.min,
          mainAxisAlignment: MainAxisAlignment.center,
          children: [
            TextFormField(
              validator: (value) {
                // add email validation
                if (value == null || value.isEmpty) {
                  return 'Silakan masukkan email anda';
                }

                bool emailValid = RegExp(
                        r"^[a-zA-Z0-9.a-zA-Z0-9.!#$%&'*+-/=?^_`{|}~]+@[a-zA-Z0-9]+\.[a-zA-Z]+")
                    .hasMatch(value);
                if (!emailValid) {
                  return 'Tolong masukkan email yang benar';
                }

                return null;
              },
              controller: emailController,
              decoration: const InputDecoration(
                labelText: 'Email',
                hintText: 'Masukkan email Anda',
                prefixIcon: Icon(Icons.email_outlined),
                border: OutlineInputBorder(),
              ),
            ),
            _gap(),
            TextFormField(
              validator: (value) {
                if (value == null || value.isEmpty) {
                  return 'Silakan masukkan password anda';
                }

                if (value.length < 6) {
                  return 'Kata sandi minimal harus 6 karakter';
                }
                return null;
              },
              obscureText: !_isPasswordVisible,
              controller: passwordController,
              decoration: InputDecoration(
                  labelText: 'Password',
                  hintText: 'Masukkan kata sandi Anda',
                  prefixIcon: const Icon(Icons.lock_outline_rounded),
                  border: const OutlineInputBorder(),
                  suffixIcon: IconButton(
                    icon: Icon(_isPasswordVisible
                        ? Icons.visibility_off
                        : Icons.visibility),
                    onPressed: () {
                      setState(() {
                        _isPasswordVisible = !_isPasswordVisible;
                      });
                    },
                  )),
            ),
            _gap(),
            SizedBox(
              width: double.infinity,
              child: ElevatedButton(
                style: ElevatedButton.styleFrom(
                  shape: RoundedRectangleBorder(
                      borderRadius: BorderRadius.circular(4)),
                ),
                child: const Padding(
                  padding: EdgeInsets.all(10.0),
                  child: Text(
                    'Login',
                    style: TextStyle(fontSize: 16, fontWeight: FontWeight.bold),
                  ),
                ),
                onPressed: () {
                  if (_formKey.currentState!.validate()) {
                    if (emailController.text.isEmpty ||
                        passwordController.text.isEmpty) {
                      ScaffoldMessenger.of(context).showSnackBar(
                        SnackBar(
                          backgroundColor: alertColor,
                          content: Row(
                            children: [
                              Icon(
                                Icons.warning,
                                color: Colors.white,
                              ),
                              SizedBox(width: 8), // Jarak antara ikon dan teks
                              Text(
                                'Email dan Password tidak boleh kosong',
                                textAlign: TextAlign.center,
                              ),
                            ],
                          ),
                        ),
                      );

                      Future.delayed(Duration(seconds: 2), () {
                        ScaffoldMessenger.of(context).hideCurrentSnackBar();
                      });
                    } else {
                      handleSignIn();
                    }
                  }
                },
              ),
            ),
          ],
        ),
      ),
    );
  }

  Widget _gap() => const SizedBox(height: 16);
}