import 'package:flutter/material.dart';

// Main Entry Point
void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Login Screen',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: LoginScreen(),
    );
  }
}

// Login Screen
class LoginScreen extends StatefulWidget {
  @override
  _LoginScreenState createState() => _LoginScreenState();
}

class _LoginScreenState extends State<LoginScreen> {
  final TextEditingController _emailController = TextEditingController();
  final TextEditingController _passwordController = TextEditingController();
  final GlobalKey<FormState> _formKey = GlobalKey<FormState>();

  // Login function
  void _login() {
    if (_formKey.currentState?.validate() ?? false) {
      // Handle login logic
      String email = _emailController.text;
      String password = _passwordController.text;
      // Normally, you'd call an API here to check credentials
      print("Logging in with $email and password: $password");
    }
  }

  // Navigate to password recovery screen
  void _navigateToPasswordRecovery() {
    Navigator.push(
      context,
      MaterialPageRoute(builder: (context) => PasswordRecoveryScreen()),
    );
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text('Login')),
      body: Padding(
        padding: const EdgeInsets.all(16.0),
        child: Form(
          key: _formKey,
          child: Column(
            crossAxisAlignment: CrossAxisAlignment.stretch,
            children: [
              // Email Field
              TextFormField(
                controller: _emailController,
                decoration: InputDecoration(labelText: 'Email'),
                keyboardType: TextInputType.emailAddress,
                validator: (value) {
                  if (value == null || value.isEmpty) {
                    return 'Please enter an email address';
                  }
                  // Simple email validation
                  if (!RegExp(r'^[\w-]+(\.[\w-]+)*@([\w-]+\.)+[a-zA-Z]{2,7}$')
                      .hasMatch(value)) {
                    return 'Enter a valid email address';
                  }
                  return null;
                },
              ),
              SizedBox(height: 16),

              // Password Field
              TextFormField(
                controller: _passwordController,
                decoration: InputDecoration(labelText: 'Password'),
                obscureText: true,
                validator: (value) {
                  if (value == null || value.isEmpty) {
                    return 'Please enter your password';
                  }
                  return null;
                },
              ),
              SizedBox(height: 24),

              // Login Button
              ElevatedButton(
                onPressed: _login,
                child: Text('Login'),
              ),
              SizedBox(height: 16),

              // Forgot Password Button
              TextButton(
                onPressed: _navigateToPasswordRecovery,
                child: Text('Forgot Password?'),
              ),
            ],
          ),
        ),
      ),
    );
  }
}

// Password Recovery Screen
class PasswordRecoveryScreen extends StatefulWidget {
  @override
  _PasswordRecoveryScreenState createState() =>
      _PasswordRecoveryScreenState();
}

class _PasswordRecoveryScreenState extends State<PasswordRecoveryScreen> {
  final TextEditingController _emailController = TextEditingController();
  final GlobalKey<FormState> _formKey = GlobalKey<FormState>();

  // Password Recovery Function
  void _recoverPassword() {
    if (_formKey.currentState?.validate() ?? false) {
      // Handle password recovery logic
      String email = _emailController.text;
      print("Password recovery request for email: $email");
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text('Password Recovery')),
      body: Padding(
        padding: const EdgeInsets.all(16.0),
        child: Form(
          key: _formKey,
          child: Column(
            crossAxisAlignment: CrossAxisAlignment.stretch,
            children: [
              // Email Field for Password Recovery
              TextFormField(
                controller: _emailController,
                decoration: InputDecoration(labelText: 'Enter your email'),
                keyboardType: TextInputType.emailAddress,
                validator: (value) {
                  if (value == null || value.isEmpty) {
                    return 'Please enter an email address';
                  }
                  // Simple email validation
                  if (!RegExp(r'^[\w-]+(\.[\w-]+)*@([\w-]+\.)+[a-zA-Z]{2,7}$')
                      .hasMatch(value)) {
                    return 'Enter a valid email address';
                  }
                  return null;
                },
              ),
              SizedBox(height: 24),

              // Recover Password Button
              ElevatedButton(
                onPressed: _recoverPassword,
                child: Text('Recover Password'),
              ),
            ],
          ),
        ),
      ),
    );
  }
}