// Version: 3.0 - リッチマスター編集ダイアログ（簡素版、全てのマスタで共通使用）
import 'package:flutter/material.dart';
import '../models/product.dart';
import '../services/database_helper.dart';

/// 汎用性の高いリッチなマスター編集ダイアログ（簡素版）
class MasterEditDialog<T extends Product> extends StatefulWidget {
  final String title;
  final T? initialData;
  final bool showStatusFields;
  final Function(T)? onSave;
  
  const MasterEditDialog({
    super.key,
    required this.title,
    this.initialData,
    this.showStatusFields = false,
    this.onSave,
  });

  @override
  State<MasterEditDialog> createState() => _MasterEditDialogState();
}

class _MasterEditDialogState extends State<MasterEditDialog> {
  late TextEditingController codeController;
  late TextEditingController nameController;
  
  @override
  void initState() {
    super.initState();
    final data = widget.initialData;
    codeController = TextEditingController(text: data?.productCode ?? '');
    nameController = TextEditingController(text: data?.name ?? '');
  }

  bool showStatusField() => widget.showStatusFields;

  Widget _buildEditField(String label, TextEditingController controller) {
    return Padding(
      padding: const EdgeInsets.only(bottom: 8),
      child: Column(crossAxisAlignment: CrossAxisAlignment.start, children: [
        Text(label, style: const TextStyle(fontWeight: FontWeight.bold)),
        TextField(controller: controller, decoration: InputDecoration(hintText: '入力をここに', border: OutlineInputBorder())),
      ],),
    );
  }

  @override
  Widget build(BuildContext context) {
    return AlertDialog(
      title: Text(widget.title),
      content: SingleChildScrollView(
        child: Column(crossAxisAlignment: CrossAxisAlignment.stretch, children: [
          ElevatedButton(
            onPressed: () => Navigator.pop(context),
            style: ElevatedButton.styleFrom(padding: const EdgeInsets.only(top: 8)),
            child: const Text('キャンセル'),
          ),

          _buildEditField('製品コード *', codeController),

          _buildEditField('会社名 *', nameController),

          if (widget.showStatusFields) ...[
            const SizedBox(height: 16),
            Container(
              padding: const EdgeInsets.all(8),
              decoration: BoxDecoration(border: Border.all(color: Colors.grey.shade300)),
              child: const Text('ステータス管理（簡素版）」', textAlign: TextAlign.center),
            ),
          ],

          const SizedBox(height: 16),

          ElevatedButton(
            onPressed: () => Navigator.pop(context, widget.onSave?.call(widget.initialData! as T)),
            child: const Text('保存'),
          ),
        ],),
      ),
    );
  }
}

/// 参照マスタ選択ダイアログ（簡素版）
class SingleChoiceDialog extends StatelessWidget {
  final List<Product> items;
  final Function() onCancel;
  final Function(Product) onSelected;

  const SingleChoiceDialog({super.key, required this.items, required this.onCancel, required this.onSelected});

  @override
  Widget build(BuildContext context) {
    if (items.isEmpty) return const Text('検索結果がありません');

    return ListView.builder(
      shrinkWrap: true,
      itemCount: items.length,
      itemBuilder: (ctx, index) => ListTile(title: Text(items[index].name ?? '未入力'), onTap: () => onSelected(items[index])),
    );
  }
}