import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';

import '../../core/theme/app_theme.dart';
import '../../providers/parent_providers.dart';
import 'parent_space_screen.dart';
import 'widgets/pin_entry_card.dart';

/// Verrouillage en mémoire : le PIN est redemandé à chaque visite.
class ParentGateScreen extends ConsumerStatefulWidget {
  const ParentGateScreen({super.key});

  @override
  ConsumerState<ParentGateScreen> createState() => _ParentGateScreenState();
}

class _ParentGateScreenState extends ConsumerState<ParentGateScreen> {
  final _pinController = TextEditingController();
  bool _obscurePin = true;
  bool _isChecking = false;
  String? _error;

  @override
  void dispose() {
    _pinController.dispose();
    super.dispose();
  }

  Future<void> _submitPin() async {
    final pin = _pinController.text;
    if (pin.length < 4) {
      setState(() => _error = 'Le PIN doit contenir au moins 4 chiffres.');
      return;
    }

    setState(() {
      _isChecking = true;
      _error = null;
    });

    final ok = await ref.read(parentRepositoryProvider).verifyPin(pin);
    if (!mounted) return;

    if (!ok) {
      setState(() {
        _isChecking = false;
        _error = 'Code PIN incorrect.';
        _pinController.clear();
      });
      return;
    }

    _pinController.clear();
    await Navigator.of(context).pushReplacement(
      MaterialPageRoute<void>(builder: (_) => const ParentSpaceScreen()),
    );
  }

  @override
  Widget build(BuildContext context) {
    return DecoratedBox(
      decoration: const BoxDecoration(gradient: AppTheme.primaryGradient),
      child: Scaffold(
        backgroundColor: Colors.transparent,
        appBar: AppBar(
          leading: IconButton(
            icon: const Icon(Icons.arrow_back),
            onPressed: () => Navigator.of(context).pop(),
          ),
          title: const Text('Espace Parents'),
        ),
        body: SafeArea(
          child: Padding(
            padding: const EdgeInsets.symmetric(horizontal: 20),
            child: PinEntryCard(
              pinController: _pinController,
              obscurePin: _obscurePin,
              isLoading: _isChecking,
              error: _error,
              onToggleObscure: () => setState(() => _obscurePin = !_obscurePin),
              onSubmit: _submitPin,
            ),
          ),
        ),
      ),
    );
  }
}