import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import '../application/auth_controller.dart';
import '../../onboarding/presentation/onboarding_intro_screen.dart';

class AuthGate extends ConsumerWidget {
  const AuthGate({super.key});

  @override
  Widget build(BuildContext context, WidgetRef ref) {
    final authState = ref.watch(authControllerProvider);
    
    if (authState == null) {
      return const SignInScreen();
    }
    
    return const OnboardingIntroScreen();
  }
}

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

  @override
  ConsumerState<SignInScreen> createState() => _SignInScreenState();
}

class _SignInScreenState extends ConsumerState<SignInScreen> {
  final _formKey = GlobalKey<FormState>();
  final _emailController = TextEditingController();
  final _passwordController = TextEditingController();
  bool _isLoading = false;

  @override
  void dispose() {
    _emailController.dispose();
    _passwordController.dispose();
    super.dispose();
  }

  Future<void> _signIn() async {
    if (!_formKey.currentState!.validate()) return;
    
    setState(() => _isLoading = true);
    
    try {
      await ref.read(authControllerProvider.notifier).signInWithEmail(
            _emailController.text.trim(),
            _passwordController.text,
          );
    } catch (e) {
      if (mounted) {
        ScaffoldMessenger.of(context).showSnackBar(
          SnackBar(content: Text('Error: $e')),
        );
      }
    } finally {
      if (mounted) setState(() => _isLoading = false);
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('LifeTimer'),
      ),
      body: Padding(
        padding: const EdgeInsets.all(24.0),
        child: Form(
          key: _formKey,
          child: Column(
            mainAxisAlignment: MainAxisAlignment.center,
            crossAxisAlignment: CrossAxisAlignment.stretch,
            children: [
              const Text(
                'Welcome Back',
                style: TextStyle(
                  fontSize: 32,
                  fontWeight: FontWeight.bold,
                ),
                textAlign: TextAlign.center,
              ),
              const SizedBox(height: 32),
              TextFormField(
                controller: _emailController,
                decoration: const InputDecoration(
                  labelText: 'Email',
                  border: OutlineInputBorder(),
                ),
                keyboardType: TextInputType.emailAddress,
                validator: (value) {
                  if (value == null || value.isEmpty) {
                    return 'Please enter your email';
                  }
                  return null;
                },
              ),
              const SizedBox(height: 16),
              TextFormField(
                controller: _passwordController,
                decoration: const InputDecoration(
                  labelText: 'Password',
                  border: OutlineInputBorder(),
                ),
                obscureText: true,
                validator: (value) {
                  if (value == null || value.isEmpty) {
                    return 'Please enter your password';
                  }
                  return null;
                },
              ),
              const SizedBox(height: 24),
              ElevatedButton(
                onPressed: _isLoading ? null : _signIn,
                child: _isLoading
                    ? const CircularProgressIndicator()
                    : const Text('Sign In'),
              ),
              const SizedBox(height: 16),
              TextButton(
                onPressed: () {
                  // Navigate to sign up
                },
                child: const Text('Don\'t have an account? Sign Up'),
              ),
            ],
          ),
        ),
      ),
    );
  }
}