import 'package:flutter/material.dart';

class SignupScreen extends StatefulWidget {
  final VoidCallback onSwitchToLogin;
  const SignupScreen({required this.onSwitchToLogin, super.key});

  @override
  State<SignupScreen> createState() => _SignupScreenState();
}

class _SignupScreenState extends State<SignupScreen> {
  final _formKey = GlobalKey<FormState>();
  final _usernameController = TextEditingController();
  final _emailController = TextEditingController();
  final _passwordController = TextEditingController();

  void _signup() {
    if (_formKey.currentState!.validate()) {
      final username = _usernameController.text;
      final email = _emailController.text;
      final password = _passwordController.text;
      // TODO: Replace with actual signup logic
      print('Signing up with $username, $email, $password');
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      //appBar: AppBar(title: Text('Sign Up')),
      body: Padding(
        padding: const EdgeInsets.all(24.0),
        child: Form(
          key: _formKey,
          child: Center(
            child: SingleChildScrollView(
              child: Column(
                children: [
                  Text(
                    'Create your Fuel Stats account',
                    style: TextStyle(
                      fontSize: 24,
                      fontWeight: FontWeight.bold,
                    ),
                  ),
                  const SizedBox(height: 32),
                  TextFormField(
                    controller: _usernameController,
                    decoration: InputDecoration(
                      labelText: 'Username',
                      prefixIcon: Icon(Icons.person),
                      border: OutlineInputBorder(),
                    ),
                    validator: (value) {
                      if (value == null || value.isEmpty)
                        return 'Please enter a username';
                      return null;
                    },
                  ),
                  const SizedBox(height: 16),
                  TextFormField(
                    controller: _emailController,
                    decoration: InputDecoration(
                      labelText: 'Email',
                      prefixIcon: Icon(Icons.email),
                      border: OutlineInputBorder(),
                    ),
                    keyboardType: TextInputType.emailAddress,
                    validator: (value) {
                      if (value == null || value.isEmpty)
                        return 'Please enter an email';
                      if (!RegExp(r'^[^@]+@[^@]+\.[^@]+').hasMatch(value))
                        return 'Enter a valid email';
                      return null;
                    },
                  ),
                  const SizedBox(height: 16),
                  TextFormField(
                    controller: _passwordController,
                    decoration: InputDecoration(
                      labelText: 'Password',
                      prefixIcon: Icon(Icons.lock),
                      border: OutlineInputBorder(),
                    ),
                    obscureText: true,
                    validator: (value) {
                      if (value == null || value.isEmpty)
                        return 'Please enter a password';
                      if (value.length < 6)
                        return 'Password must be at least 6 characters';
                      return null;
                    },
                  ),
                  const SizedBox(height: 24),
                  ElevatedButton.icon(
                    onPressed: _signup,
                    icon: Icon(Icons.person_add),
                    label: Text('Sign Up'),
                    style: ElevatedButton.styleFrom(
                      backgroundColor: Colors.blue,
                      foregroundColor: Colors.white,
                      padding: EdgeInsets.symmetric(horizontal: 32, vertical: 12),
                    ),
                  ),
                  const SizedBox(height: 12),
                  TextButton(
                    onPressed: widget.onSwitchToLogin,
                    child: Text("Already have an account? Log in"),
                  ),
                ],
              ),
            ),
          ),
        ),
      ),
    );
  }
}