import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import '../models/home_config.dart';
import '../providers/providers.dart';
import 'home_edit_screen.dart';
import 'remote_screen.dart';

/// Экран "Дома" -- список серверов Ignis.
/// Пользователь может добавить, удалить, переключить активный дом.
class HomesScreen extends ConsumerWidget {
  const HomesScreen({super.key});

  @override
  Widget build(BuildContext context, WidgetRef ref) {
    final homes = ref.watch(homesProvider);
    final currentHome = ref.watch(currentHomeProvider);

    return Scaffold(
      appBar: AppBar(
        title: const Text('ДОМА'),
        automaticallyImplyLeading: false,
      ),
      body: homes.isEmpty
          ? Center(
              child: Column(
                mainAxisAlignment: MainAxisAlignment.center,
                children: [
                  Icon(Icons.home_outlined, size: 64, color: Colors.white24),
                  const SizedBox(height: 16),
                  const Text(
                    'Нет добавленных домов',
                    style: TextStyle(color: Colors.white54, fontSize: 16),
                  ),
                  const SizedBox(height: 8),
                  const Text(
                    'Добавьте сервер Ignis',
                    style: TextStyle(color: Colors.white38, fontSize: 14),
                  ),
                ],
              ),
            )
          : ListView.builder(
              padding: const EdgeInsets.all(12),
              itemCount: homes.length,
              itemBuilder: (context, index) {
                final home = homes[index];
                final isActive = currentHome?.id == home.id;

                return Card(
                  margin: const EdgeInsets.only(bottom: 8),
                  child: ListTile(
                    leading: Icon(
                      Icons.home,
                      color: isActive ? Colors.deepOrange : Colors.white38,
                      size: 28,
                    ),
                    title: Text(
                      home.name,
                      style: TextStyle(
                        fontWeight: isActive ? FontWeight.bold : FontWeight.normal,
                        color: isActive ? Colors.deepOrange : Colors.white,
                      ),
                    ),
                    subtitle: Column(
                      crossAxisAlignment: CrossAxisAlignment.start,
                      children: [
                        Text(
                          home.url,
                          style: const TextStyle(color: Colors.white38, fontSize: 12),
                        ),
                        if (home.hasCoordinates)
                          Row(
                            children: [
                              const Icon(Icons.location_on, size: 12, color: Colors.white24),
                              const SizedBox(width: 4),
                              Text(
                                'Координаты заданы',
                                style: const TextStyle(color: Colors.white24, fontSize: 11),
                              ),
                            ],
                          ),
                      ],
                    ),
                    trailing: Row(
                      mainAxisSize: MainAxisSize.min,
                      children: [
                        // Кнопка редактирования
                        IconButton(
                          icon: const Icon(Icons.edit, size: 20, color: Colors.white38),
                          onPressed: () => _editHome(context, ref, home),
                        ),
                        // Кнопка удаления
                        IconButton(
                          icon: const Icon(Icons.delete_outline, size: 20, color: Colors.redAccent),
                          onPressed: () => _confirmDelete(context, ref, home),
                        ),
                      ],
                    ),
                    onTap: () => _selectHome(context, ref, home),
                  ),
                );
              },
            ),
      floatingActionButton: FloatingActionButton(
        backgroundColor: Colors.deepOrange,
        onPressed: () => _addHome(context),
        child: const Icon(Icons.add),
      ),
    );
  }

  /// Выбрать дом и перейти на пульт
  void _selectHome(BuildContext context, WidgetRef ref, HomeConfig home) async {
    await ref.read(currentHomeProvider.notifier).switchTo(home);
    await ref.read(authInfoProvider.notifier).load();
    if (context.mounted) {
      Navigator.of(context).pushReplacement(
        MaterialPageRoute(builder: (_) => const RemoteScreen()),
      );
    }
  }

  /// Добавить новый дом
  void _addHome(BuildContext context) {
    Navigator.of(context).push(
      MaterialPageRoute(builder: (_) => const HomeEditScreen()),
    );
  }

  /// Редактировать дом
  void _editHome(BuildContext context, WidgetRef ref, HomeConfig home) {
    Navigator.of(context).push(
      MaterialPageRoute(builder: (_) => HomeEditScreen(home: home)),
    );
  }

  /// Подтвердить удаление
  void _confirmDelete(BuildContext context, WidgetRef ref, HomeConfig home) {
    showDialog(
      context: context,
      builder: (ctx) => AlertDialog(
        title: const Text('Удалить дом?'),
        content: Text('Удалить "${home.name}" (${home.url})?'),
        actions: [
          TextButton(
            onPressed: () => Navigator.of(ctx).pop(),
            child: const Text('Отмена'),
          ),
          TextButton(
            onPressed: () async {
              Navigator.of(ctx).pop();
              await ref.read(homesProvider.notifier).remove(home.id);
            },
            child: const Text('Удалить', style: TextStyle(color: Colors.redAccent)),
          ),
        ],
      ),
    );
  }
}