// lib/screens/company_editor_screen.dart
import 'package:flutter/material.dart';
import 'package:uuid/uuid.dart';
import '../models/company_model.dart';
import '../services/master_repository.dart';

/// 自社情報を編集・保存するための画面
class CompanyEditorScreen extends StatefulWidget {
  const CompanyEditorScreen({super.key});

  @override
  State<CompanyEditorScreen> createState() => _CompanyEditorScreenState();
}

class _CompanyEditorScreenState extends State<CompanyEditorScreen> {
  final _repository = MasterRepository();
  final _formKey = GlobalKey<FormState>(); // フォームのバリデーション用

  late Company _company;
  late TextEditingController _formalNameController;
  late TextEditingController _representativeController;
  late TextEditingController _zipCodeController;
  late TextEditingController _addressController;
  late TextEditingController _telController;
  late TextEditingController _faxController;
  late TextEditingController _emailController;
  late TextEditingController _websiteController;
  late TextEditingController _registrationNumberController;
  late TextEditingController _notesController;

  bool _isLoading = true;

  @override
  void initState() {
    super.initState();
    _loadCompanyInfo();
  }

  Future<void> _loadCompanyInfo() async {
    setState(() => _isLoading = true);
    _company = await _repository.loadCompany();

    _formalNameController = TextEditingController(text: _company.formalName);
    _representativeController = TextEditingController(text: _company.representative);
    _zipCodeController = TextEditingController(text: _company.zipCode);
    _addressController = TextEditingController(text: _company.address);
    _telController = TextEditingController(text: _company.tel);
    _faxController = TextEditingController(text: _company.fax);
    _emailController = TextEditingController(text: _company.email);
    _websiteController = TextEditingController(text: _company.website);
    _registrationNumberController = TextEditingController(text: _company.registrationNumber);
    _notesController = TextEditingController(text: _company.notes);

    setState(() => _isLoading = false);
  }

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

    final updatedCompany = _company.copyWith(
      formalName: _formalNameController.text.trim(),
      representative: _representativeController.text.trim(),
      zipCode: _zipCodeController.text.trim(),
      address: _addressController.text.trim(),
      tel: _telController.text.trim(),
      fax: _faxController.text.trim(),
      email: _emailController.text.trim(),
      website: _websiteController.text.trim(),
      registrationNumber: _registrationNumberController.text.trim(),
      notes: _notesController.text.trim(),
    );

    await _repository.saveCompany(updatedCompany);

    if (mounted) {
      ScaffoldMessenger.of(context).showSnackBar(
        const SnackBar(content: Text('自社情報を保存しました。')),
      );
      Navigator.pop(context); // 編集画面を閉じる
    }
  }

  @override
  void dispose() {
    _formalNameController.dispose();
    _representativeController.dispose();
    _zipCodeController.dispose();
    _addressController.dispose();
    _telController.dispose();
    _faxController.dispose();
    _emailController.dispose();
    _websiteController.dispose();
    _registrationNumberController.dispose();
    _notesController.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text("自社情報編集"),
        backgroundColor: Colors.blueGrey,
        foregroundColor: Colors.white,
        actions: [
          IconButton(
            icon: const Icon(Icons.save),
            onPressed: _saveCompanyInfo,
            tooltip: "保存",
          ),
        ],
      ),
      body: _isLoading
          ? const Center(child: CircularProgressIndicator())
          : Form(
              key: _formKey,
              child: SingleChildScrollView(
                padding: const EdgeInsets.all(16.0),
                child: Column(
                  crossAxisAlignment: CrossAxisAlignment.start,
                  children: [
                    TextFormField(
                      controller: _formalNameController,
                      decoration: const InputDecoration(labelText: "正式名称 (必須)", border: OutlineInputBorder()),
                      validator: (value) {
                        if (value == null || value.isEmpty) {
                          return '正式名称は必須です';
                        }
                        return null;
                      },
                    ),
                    const SizedBox(height: 16),
                    TextFormField(
                      controller: _representativeController,
                      decoration: const InputDecoration(labelText: "代表者名", border: OutlineInputBorder()),
                    ),
                    const SizedBox(height: 16),
                    TextFormField(
                      controller: _zipCodeController,
                      decoration: const InputDecoration(labelText: "郵便番号", border: OutlineInputBorder()),
                      keyboardType: TextInputType.text,
                    ),
                    const SizedBox(height: 16),
                    TextFormField(
                      controller: _addressController,
                      decoration: const InputDecoration(labelText: "住所", border: OutlineInputBorder()),
                      maxLines: 2,
                    ),
                    const SizedBox(height: 16),
                    TextFormField(
                      controller: _telController,
                      decoration: const InputDecoration(labelText: "電話番号", border: OutlineInputBorder()),
                      keyboardType: TextInputType.phone,
                    ),
                    const SizedBox(height: 16),
                    TextFormField(
                      controller: _faxController,
                      decoration: const InputDecoration(labelText: "FAX番号", border: OutlineInputBorder()),
                      keyboardType: TextInputType.phone,
                    ),
                    const SizedBox(height: 16),
                    TextFormField(
                      controller: _emailController,
                      decoration: const InputDecoration(labelText: "メールアドレス", border: OutlineInputBorder()),
                      keyboardType: TextInputType.emailAddress,
                    ),
                    const SizedBox(height: 16),
                    TextFormField(
                      controller: _websiteController,
                      decoration: const InputDecoration(labelText: "ウェブサイト", border: OutlineInputBorder()),
                      keyboardType: TextInputType.url,
                    ),
                    const SizedBox(height: 16),
                    TextFormField(
                      controller: _registrationNumberController,
                      decoration: const InputDecoration(labelText: "登録番号 (インボイス制度対応)", border: OutlineInputBorder()),
                    ),
                    const SizedBox(height: 16),
                    TextFormField(
                      controller: _notesController,
                      decoration: const InputDecoration(labelText: "備考", border: OutlineInputBorder()),
                      maxLines: 3,
                    ),
                    const SizedBox(height: 32),
                    SizedBox(
                      width: double.infinity,
                      child: ElevatedButton.icon(
                        onPressed: _saveCompanyInfo,
                        icon: const Icon(Icons.save),
                        label: const Text("自社情報を保存"),
                        style: ElevatedButton.styleFrom(
                          backgroundColor: Colors.indigo,
                          foregroundColor: Colors.white,
                          padding: const EdgeInsets.symmetric(vertical: 12),
                        ),
                      ),
                    ),
                  ],
                ),
              ),
            ),
    );
  }
}