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

/// Экран создания или редактирования "дома" (сервера Ignis).
class HomeEditScreen extends ConsumerStatefulWidget {
  final HomeConfig? home; // null -- создание, иначе редактирование

  const HomeEditScreen({super.key, this.home});

  @override
  ConsumerState<HomeEditScreen> createState() => _HomeEditScreenState();
}

class _HomeEditScreenState extends ConsumerState<HomeEditScreen> {
  final _nameCtrl = TextEditingController();
  final _urlCtrl = TextEditingController();
  final _keyCtrl = TextEditingController();
  bool _saving = false;

  bool get _isEdit => widget.home != null;

  @override
  void initState() {
    super.initState();
    if (_isEdit) {
      _nameCtrl.text = widget.home!.name;
      _urlCtrl.text = widget.home!.url;
      _keyCtrl.text = widget.home!.apiKey;
    }
  }

  @override
  void dispose() {
    _nameCtrl.dispose();
    _urlCtrl.dispose();
    _keyCtrl.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(_isEdit ? 'РЕДАКТИРОВАТЬ ДОМ' : 'НОВЫЙ ДОМ'),
      ),
      body: Padding(
        padding: const EdgeInsets.all(20),
        child: Column(
          children: [
            TextField(
              controller: _nameCtrl,
              decoration: const InputDecoration(
                labelText: 'Название (например "Квартира")',
                prefixIcon: Icon(Icons.home),
              ),
              textCapitalization: TextCapitalization.sentences,
            ),
            const SizedBox(height: 12),
            TextField(
              controller: _urlCtrl,
              decoration: const InputDecoration(
                labelText: 'Адрес сервера (например ignis.akokos.ru)',
                prefixIcon: Icon(Icons.dns),
              ),
              keyboardType: TextInputType.url,
            ),
            const SizedBox(height: 12),
            TextField(
              controller: _keyCtrl,
              decoration: const InputDecoration(
                labelText: 'API Key',
                prefixIcon: Icon(Icons.key),
              ),
              obscureText: true,
            ),
            const SizedBox(height: 24),
            SizedBox(
              width: double.infinity,
              height: 48,
              child: ElevatedButton(
                style: ElevatedButton.styleFrom(
                  backgroundColor: Colors.deepOrange,
                  foregroundColor: Colors.white,
                ),
                onPressed: _saving ? null : _save,
                child: _saving
                    ? const SizedBox(
                        width: 20,
                        height: 20,
                        child: CircularProgressIndicator(
                          strokeWidth: 2,
                          color: Colors.white,
                        ),
                      )
                    : Text(_isEdit ? 'СОХРАНИТЬ' : 'ДОБАВИТЬ'),
              ),
            ),
          ],
        ),
      ),
    );
  }

  Future<void> _save() async {
    final name = _nameCtrl.text.trim();
    final url = _urlCtrl.text.trim();
    final key = _keyCtrl.text.trim();

    if (name.isEmpty || url.isEmpty || key.isEmpty) {
      ScaffoldMessenger.of(context).showSnackBar(
        const SnackBar(content: Text('Заполните все поля')),
      );
      return;
    }

    setState(() => _saving = true);

    final home = _isEdit
        ? widget.home!.copyWith(name: name, url: url, apiKey: key)
        : HomeConfig(
            id: DateTime.now().millisecondsSinceEpoch.toString(),
            name: name,
            url: url,
            apiKey: key,
          );

    if (_isEdit) {
      await ref.read(homesProvider.notifier).update(home);
    } else {
      await ref.read(homesProvider.notifier).add(home);
    }

    if (mounted) Navigator.of(context).pop();
  }
}