// ignore_for_file: deprecated_member_use

import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:go_router/go_router.dart';
import '../../../core/widgets/app_scaffold.dart';
import '../../../core/widgets/primary_button.dart';
import '../../../core/utils/validators.dart';
import '../application/auth_controller.dart';

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

  @override
  ConsumerState<SignUpScreen> createState() => _SignUpScreenState();
}

class _SignUpScreenState extends ConsumerState<SignUpScreen> {
  final _formKey = GlobalKey<FormState>();
  final _emailController = TextEditingController();
  final _passwordController = TextEditingController();
  final _confirmPasswordController = TextEditingController();
  final _usernameController = TextEditingController();
  bool _isLoading = false;
  bool _obscurePassword = true;
  bool _obscureConfirmPassword = true;

  Future<void> _handleSignUp() async {
    if (!_formKey.currentState!.validate()) return;

    setState(() => _isLoading = true);
    try {
      await ref.read(authControllerProvider.notifier).signUpWithEmail(
            _emailController.text.trim(),
            _passwordController.text,
            _usernameController.text.trim(),
          );
    } catch (e) {
      if (mounted) {
        ScaffoldMessenger.of(context).showSnackBar(
          SnackBar(content: Text('Sign up failed: $e')),
        );
      }
    } finally {
      if (mounted) {
        setState(() => _isLoading = false);
      }
    }
  }

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

  @override
  Widget build(BuildContext context) {
    return AppScaffold(
      body: Center(
        child: SingleChildScrollView(
          padding: const EdgeInsets.all(24.0),
          child: Center(
            child: ConstrainedBox(
              constraints: const BoxConstraints(maxWidth: 420),
              child: Container(
                padding: const EdgeInsets.symmetric(
                  horizontal: 24,
                  vertical: 32,
                ),
                decoration: BoxDecoration(
                  color: Theme.of(context).colorScheme.surface,
                  borderRadius: BorderRadius.circular(32),
                  boxShadow: [
                    BoxShadow(
                      color: Colors.black.withOpacity(0.06),
                      blurRadius: 40,
                      offset: const Offset(0, 24),
                    ),
                  ],
                ),
                child: Form(
                  key: _formKey,
                  child: Column(
                    crossAxisAlignment: CrossAxisAlignment.stretch,
                    children: [
                      Row(
                        mainAxisAlignment: MainAxisAlignment.spaceBetween,
                        children: [
                          Text(
                            'LifeTimer',
                            style: Theme.of(context)
                                .textTheme
                                .titleMedium
                                ?.copyWith(
                                  fontWeight: FontWeight.w600,
                                ),
                          ),
                          Container(
                            padding: const EdgeInsets.symmetric(
                              horizontal: 12,
                              vertical: 6,
                            ),
                            decoration: BoxDecoration(
                              color: Theme.of(context).colorScheme.surface,
                              borderRadius: BorderRadius.circular(999),
                              border: Border.all(
                                color: Theme.of(context)
                                    .colorScheme
                                    .onSurface
                                    .withOpacity(0.08),
                              ),
                            ),
                            child: Text(
                              'Create account',
                              style: Theme.of(context)
                                  .textTheme
                                  .labelMedium
                                  ?.copyWith(
                                    color: Theme.of(context)
                                        .colorScheme
                                        .onSurface
                                        .withOpacity(0.8),
                                  ),
                            ),
                          ),
                        ],
                      ),
                      const SizedBox(height: 24),
                      Text(
                        'Start your journey',
                        style: Theme.of(context)
                            .textTheme
                            .headlineMedium
                            ?.copyWith(
                              fontWeight: FontWeight.bold,
                            ),
                      ),
                      const SizedBox(height: 8),
                      Text(
                        'Create an account to begin your 1356-day challenge',
                        style: Theme.of(context)
                            .textTheme
                            .bodyLarge
                            ?.copyWith(
                              color: Theme.of(context)
                                  .colorScheme
                                  .onSurface
                                  .withOpacity(0.7),
                            ),
                      ),
                            const SizedBox(height: 24),
                            TextFormField(
                              controller: _usernameController,
                              textCapitalization: TextCapitalization.words,
                              textInputAction: TextInputAction.next,
                              decoration: const InputDecoration(
                                labelText: 'Username',
                                prefixIcon: Icon(Icons.person_outline),
                              ),
                              validator: Validators.validateUsername,
                              enabled: !_isLoading,
                            ),
                            const SizedBox(height: 16),
                            TextFormField(
                              controller: _emailController,
                              keyboardType: TextInputType.emailAddress,
                              textInputAction: TextInputAction.next,
                              decoration: const InputDecoration(
                                labelText: 'Email',
                                prefixIcon: Icon(Icons.email_outlined),
                              ),
                              validator: Validators.validateEmail,
                              enabled: !_isLoading,
                            ),
                            const SizedBox(height: 16),
                            TextFormField(
                              controller: _passwordController,
                              obscureText: _obscurePassword,
                              textInputAction: TextInputAction.next,
                              decoration: InputDecoration(
                                labelText: 'Password',
                                prefixIcon: const Icon(Icons.lock_outlined),
                                suffixIcon: IconButton(
                                  icon: Icon(
                                    _obscurePassword
                                        ? Icons.visibility_outlined
                                        : Icons.visibility_off_outlined,
                                  ),
                                  onPressed: () {
                                    setState(
                                      () => _obscurePassword = !_obscurePassword,
                                    );
                                  },
                                ),
                              ),
                              validator: Validators.validatePassword,
                              enabled: !_isLoading,
                            ),
                            const SizedBox(height: 16),
                            TextFormField(
                              controller: _confirmPasswordController,
                              obscureText: _obscureConfirmPassword,
                              textInputAction: TextInputAction.done,
                              decoration: InputDecoration(
                                labelText: 'Confirm Password',
                                prefixIcon: const Icon(Icons.lock_outline),
                                suffixIcon: IconButton(
                                  icon: Icon(
                                    _obscureConfirmPassword
                                        ? Icons.visibility_outlined
                                        : Icons.visibility_off_outlined,
                                  ),
                                  onPressed: () {
                                    setState(
                                      () => _obscureConfirmPassword =
                                          !_obscureConfirmPassword,
                                    );
                                  },
                                ),
                              ),
                              validator: (value) {
                                if (value == null || value.isEmpty) {
                                  return 'Please confirm your password';
                                }
                                if (value != _passwordController.text) {
                                  return 'Passwords do not match';
                                }
                                return null;
                              },
                              enabled: !_isLoading,
                              onFieldSubmitted: (_) => _handleSignUp(),
                            ),
                      const SizedBox(height: 24),
                      PrimaryButton(
                        onPressed: _handleSignUp,
                        text: _isLoading
                            ? 'Creating account...'
                            : 'Create Account',
                        isLoading: _isLoading,
                      ),
                      const SizedBox(height: 16),
                      TextButton(
                        onPressed:
                            _isLoading ? () {} : () => context.pop(),
                        child: const Text(
                          'Already have an account? Sign in',
                        ),
                      ),
                    ],
                  ),
                ),
              ),
            ),
          ),
        ),
      ),
    );
  }
}