barcode_scanner/lib/pages/login/login_page.dart

import 'package:e_scan/components/primary_button_component.dart';
import 'package:e_scan/pages/login/login_page_model.dart';
import 'package:e_scan/router/go_router_builder.dart';
import 'package:e_scan/themes/app_theme.dart';
import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';

final _errorProvider = StateProvider.autoDispose<String?>((ref) {
  return null;
});

class LoginPage extends ConsumerStatefulWidget {
  const LoginPage({super.key});

  @override
  ConsumerState<ConsumerStatefulWidget> createState() => _LoginPageState();
}

class _LoginPageState extends ConsumerState<LoginPage> {
  final TextEditingController email = TextEditingController(
    text: "user@example.com",
  );
  final TextEditingController password = TextEditingController(text: "odoo");

  final _formKey = GlobalKey<FormState>();
  bool obscureText = true;

  @override
  void dispose() {
    email.dispose();
    password.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      backgroundColor: AppTheme.of(context).primaryBackground,
      appBar: AppBar(
        title: Text(
          'BarcodeScan',
          textAlign: TextAlign.center,
          style: AppTheme.of(context).titleLarge,
        ),
        centerTitle: true,
        backgroundColor: AppTheme.of(context).primaryBackground,
        elevation: 0,
      ),
      body: Align(
        alignment: Alignment.topCenter,
        child: ConstrainedBox(
          constraints: const BoxConstraints(maxWidth: 400),
          child: Padding(
            padding: const EdgeInsets.all(24),
            child: SingleChildScrollView(
              child: Form(
                key: _formKey,
                child: Column(
                  crossAxisAlignment: CrossAxisAlignment.stretch,
                  children: [
                    const SizedBox(height: 32),
                    Text(
                      'Welcome Back',
                      style: AppTheme.of(context).titleLarge,
                    ),
                    const SizedBox(height: 8),
                    Text(
                      'Fill out the information below in order to access your account.',
                      style: AppTheme.of(context).bodyMedium.override(
                        color: AppTheme.of(context).secondaryText,
                      ),
                    ),
                    const SizedBox(height: 24),

                    /// Email
                    TextFormField(
                      decoration: InputDecoration(
                        labelText: 'Email',
                        filled: true,
                        fillColor: AppTheme.of(context).secondaryBackground,
                        border: OutlineInputBorder(
                          borderRadius: BorderRadius.circular(12),
                          borderSide: BorderSide.none,
                        ),
                      ),
                      controller: email,
                      validator: (value) {
                        if (value == null || value.isEmpty) {
                          return 'Email is required';
                        } else if (!RegExp(
                          r'^[\w-\.]+@([\w-]+\.)+[\w-]{2,4}$',
                        ).hasMatch(value)) {
                          return 'Enter a valid email';
                        }
                        return null;
                      },
                    ),
                    const SizedBox(height: 16),

                    /// Password
                    TextFormField(
                      obscureText: obscureText,
                      decoration: InputDecoration(
                        labelText: 'Password',
                        filled: true,
                        fillColor: AppTheme.of(context).secondaryBackground,
                        suffixIcon: IconButton(
                          onPressed: () {
                            setState(() {
                              obscureText = !obscureText;
                            });
                          },
                          icon: obscureText
                              ? Icon(Icons.visibility_off)
                              : Icon(Icons.visibility),
                        ),
                        border: OutlineInputBorder(
                          borderRadius: BorderRadius.circular(12),
                          borderSide: BorderSide.none,
                        ),
                      ),
                      controller: password,
                      validator: (value) {
                        if (value == null || value.isEmpty) {
                          return 'Password is required';
                        } else if (value.length < 6) {
                          return 'Password must be at least 6 characters';
                        }
                        return null;
                      },
                    ),
                    Consumer(
                      builder: (context, ref, child) {
                        final errorState = ref.watch(_errorProvider);
                        if (errorState == null) return SizedBox.shrink();
                        return Column(
                          children: [
                            SizedBox(height: 10),
                            Container(
                              width: double.maxFinite,
                              decoration: BoxDecoration(
                                borderRadius: BorderRadius.circular(8),
                                color: AppTheme.of(context).error,
                              ),
                              padding: EdgeInsets.symmetric(
                                vertical: 5,
                                horizontal: 16,
                              ),
                              child: Text(
                                errorState,
                                style: AppTheme.of(context).bodyMedium.copyWith(
                                  color: AppTheme.of(context).white,
                                ),
                              ),
                            ),
                          ],
                        );
                      },
                    ),
                    const SizedBox(height: 24),

                    /// Sign In button
                    Consumer(
                      builder: (context, ref, child) {
                        final state = ref.watch(loginPageModelProvider);
                        return PrimaryButtonComponent(
                          loading: state.loading,
                          onPressed: () {
                            ref
                                .read(loginPageModelProvider.notifier)
                                .signIn(
                                  email: email.text,
                                  password: password.text,
                                  onSuccess: () {
                                    WidgetsBinding.instance
                                        .addPostFrameCallback((timeStamp) {
                                          SplashRoute().go(context);
                                        });
                                  },
                                  onError: () {
                                    ref.read(_errorProvider.notifier).state =
                                        "Authentication failed: Access Denied";
                                  },
                                );
                          },
                          text: 'Sign In',
                        );
                      },
                    ),
                    const SizedBox(height: 16),

                    /// Divider text
                    // Center(
                    //   child: Text(
                    //     'Or sign in with',
                    //     style: TextStyle(color: Colors.grey[700]),
                    //   ),
                    // ),
                    const SizedBox(height: 16),

                    // /// Google Button
                    // OutlinedButton.icon(
                    //   icon: const FaIcon(FontAwesomeIcons.google),
                    //   label: const Text('Continue with Google'),
                    //   onPressed: () {},
                    //   style: OutlinedButton.styleFrom(
                    //     padding: const EdgeInsets.symmetric(vertical: 16),
                    //     side: const BorderSide(color: Colors.grey),
                    //     shape: RoundedRectangleBorder(
                    //       borderRadius: BorderRadius.circular(12),
                    //     ),
                    //   ),
                    // ),
                    // const SizedBox(height: 12),

                    // /// Apple Button
                    // OutlinedButton.icon(
                    //   icon: const FaIcon(FontAwesomeIcons.apple),
                    //   label: const Text('Continue with Apple'),
                    //   onPressed: () {},
                    //   style: OutlinedButton.styleFrom(
                    //     padding: const EdgeInsets.symmetric(vertical: 16),
                    //     side: const BorderSide(color: Colors.grey),
                    //     shape: RoundedRectangleBorder(
                    //       borderRadius: BorderRadius.circular(12),
                    //     ),
                    //   ),
                    // ),
                    // const SizedBox(height: 24),

                    /// Forgot Password
                    TextButton(
                      onPressed: () {},
                      child: Text(
                        'Forgot Password?',
                        style: TextStyle(
                          color: AppTheme.of(context).primaryText,
                        ),
                      ),
                    ),

                    const SizedBox(height: 24),
                  ],
                ),
              ),
            ),
          ),
        ),
      ),
    );
  }
}