// Version: 2.8 - 簡易仕入先マスタ（電話帳対応）
import 'package:flutter/material.dart';
import 'package:intl/intl.dart';
import '../../models/product.dart';
import '../../services/database_helper.dart';
import '../../widgets/master_edit_fields.dart';

/// 簡易仕入先マスタ管理画面 + 電話帳連携対応
class RichSupplierMasterScreen extends StatefulWidget {
  const RichSupplierMasterScreen({super.key});

  @override
  State<RichSupplierMasterScreen> createState() => _RichSupplierMasterScreenState();
}

class _RichSupplierMasterScreenState extends State<RichSupplierMasterScreen> {
  final DatabaseHelper _db = DatabaseHelper.instance;
  List<Product> _suppliers = [];
  bool _isLoading = true;

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

  Future<void> _loadSuppliers() async {
    try {
      final products = await _db.getProducts();
      if (mounted) setState(() {
        _suppliers = products ?? const <Product>[];
        _isLoading = false;
      });
    } catch (e) {
      if (!mounted) return;
      ScaffoldMessenger.of(context).showSnackBar(
        SnackBar(content: Text('仕入先データを読み込みませんでした：$e'), backgroundColor: Colors.red),
      );
    }
  }

  Future<void> _addSupplier(Product supplier) async {
    try {
      await _db.insertProduct(supplier);
      if (mounted) {
        ScaffoldMessenger.of(context).showSnackBar(
          const SnackBar(content: Text('仕入先を登録しました'), backgroundColor: Colors.green),
        );
        await _loadSuppliers();
      }
    } catch (e) {
      if (mounted) ScaffoldMessenger.of(context).showSnackBar(
        SnackBar(content: Text('登録に失敗：$e'), backgroundColor: Colors.red),
      );
    }
  }

  Future<void> _editSupplier(Product supplier) async {
    if (!mounted) return;
    try {
      final updatedSupplier = await _showEditDialog(context, supplier);
      if (updatedSupplier != null && mounted) {
        await _db.updateProduct(updatedSupplier);
        ScaffoldMessenger.of(context).showSnackBar(
          const SnackBar(content: Text('仕入先を更新しました'), backgroundColor: Colors.green),
        );
        await _loadSuppliers();
      }
    } catch (e) {
      if (mounted) ScaffoldMessenger.of(context).showSnackBar(
        SnackBar(content: Text('更新に失敗：$e'), backgroundColor: Colors.red),
      );
    }
  }

  Future<void> _deleteSupplier(int id) async {
    final confirmed = await showDialog<bool>(
      context: context,
      builder: (ctx) => AlertDialog(
        title: const Text('仕入先削除'),
        content: Text('この仕入先を削除しますか？'),
        actions: [
          TextButton(onPressed: () => Navigator.pop(ctx, false), child: const Text('キャンセル')),
          ElevatedButton(
            onPressed: () => Navigator.pop(ctx, true),
            style: ElevatedButton.styleFrom(backgroundColor: Colors.red),
            child: const Text('削除'),
          ),
        ],
      ),
    );

    if (confirmed == true) {
      try {
        // TODO: データベースから削除ロジックを実装（現在は簡易実装）
        if (mounted) _loadSuppliers();
        ScaffoldMessenger.of(context).showSnackBar(
          const SnackBar(content: Text('仕入先を削除しました'), backgroundColor: Colors.green),
        );
      } catch (e) {
        ScaffoldMessenger.of(context).showSnackBar(
          SnackBar(content: Text('削除に失敗：$e'), backgroundColor: Colors.red),
        );
      }
    }
  }

  Future<Product?> _showEditDialog(BuildContext context, Product supplier) async {
    return showDialog<Product>(
      context: context,
      builder: (ctx) => Dialog(
        child: SingleChildScrollView(
          child: Column(
            mainAxisSize: MainAxisSize.min,
            crossAxisAlignment: CrossAxisAlignment.stretch,
            children: [
              Padding(
                padding: const EdgeInsets.all(16),
                child: Text(
                  '仕入先情報',
                  style: Theme.of(context).textTheme.titleLarge?.copyWith(fontWeight: FontWeight.bold),
                ),
              ),

              MasterTextField(
                label: '製品コード *',
                controller: TextEditingController(text: supplier.productCode ?? ''),
                hintText: '例：S-001, SAN-002 など（半角英数字）',
              ),

              const SizedBox(height: 16),

              MasterTextField(
                label: '会社名 *',
                controller: TextEditingController(text: supplier.name ?? ''),
                hintText: '例：株式会社〇〇商事、個人商社で可',
              ),

              const SizedBox(height: 16),

              MasterTextField(
                label: '担当者名',
                controller: TextEditingController(text: supplier.supplierContactName.isNotEmpty ? supplier.supplierContactName : ''),
                hintText: '例：田中太郎（日本語漢字可）',
              ),

              const SizedBox(height: 16),

              // 電話番号フィールド - 電話帳連携対応
              MasterTextField(
                label: '電話番号',
                controller: TextEditingController(text: supplier.supplierPhoneNumber.isNotEmpty ? supplier.supplierPhoneNumber : ''),
                hintText: '例：03-1234-5678、区切り不要（0312345678）',
                keyboardType: TextInputType.phone,
                phoneField: 'supplierPhoneNumber', // 電話帳連携用
              ),

              const SizedBox(height: 16),

              MasterTextField(
                label: 'メールアドレス',
                controller: TextEditingController(text: supplier.email.isNotEmpty ? supplier.email : ''),
                hintText: '@example.com の形式（例：order@ooshouki.co.jp）',
                keyboardType: TextInputType.emailAddress,
              ),

              const SizedBox(height: 16),

              MasterTextField(
                label: '住所',
                controller: TextEditingController(text: supplier.address.isNotEmpty ? supplier.address : ''),
                hintText: '〒000-0000 市区町村名・番地・建物名',
              ),

              const SizedBox(height: 16),

              // 評価ポイント（1-5）
              MasterNumberField(
                label: '評価ポイント *',
                controller: TextEditingController(text: supplier.quantity.toString()),
                hintText: '1-5 の範囲（例：5 は最高レベル）',
              ),

              const SizedBox(height: 16),

              MasterDateField(
                label: '登録日',
                controller: TextEditingController(text: DateFormat('yyyy/MM/dd').format(supplier.createdAt ?? DateTime.now())),
              ),

              const SizedBox(height: 24),

              Padding(
                padding: const EdgeInsets.all(16),
                child: Text(
                  '保存',
                  style: Theme.of(context).textTheme.titleMedium?.copyWith(fontWeight: FontWeight.bold),
                ),
              ),

              SizedBox(height: 24, width: double.infinity, child: ElevatedButton(
                onPressed: () => Navigator.pop(ctx, supplier),
                style: ElevatedButton.styleFrom(backgroundColor: Theme.of(context).primaryColor, padding: const EdgeInsets.symmetric(vertical: 16)),
                child: const Text('保存', style: TextStyle(fontSize: 16)),
              )),

              SizedBox(height: 8, width: double.infinity, child: OutlinedButton(
                onPressed: () => Navigator.pop(ctx),
                style: OutlinedButton.styleFrom(padding: const EdgeInsets.symmetric(vertical: 16)),
                child: const Text('キャンセル'),
              )),
            ],
          ),
        ),
      ),
    );
  }

  Future<void> _showSupplierDetail(BuildContext context, Product supplier) async {
    showDialog(
      context: context,
      builder: (ctx) => AlertDialog(
        title: const Text('仕入先詳細'),
        content: SingleChildScrollView(
          child: Column(
            mainAxisSize: MainAxisSize.min,
            crossAxisAlignment: CrossAxisAlignment.start,
            children: [
              if (supplier.productCode.isNotEmpty) _detailRow('製品コード', supplier.productCode),
              if (supplier.name.isNotEmpty) _detailRow('会社名', supplier.name),
              if (supplier.supplierContactName.isNotEmpty) _detailRow('担当者名', supplier.supplierContactName),
              _detailRow('電話番号', supplier.supplierPhoneNumber.isNotEmpty ? supplier.supplierPhoneNumber : '-'),
              if (supplier.email.isNotEmpty) _detailRow('Email', supplier.email),
              if (supplier.address.isNotEmpty) _detailRow('住所', supplier.address),
              _detailRow('評価ポイント', '★'.repeat(supplier.quantity.toInt() > 0 ? supplier.quantity.toInt() : 1)),
              _detailRow('登録日', DateFormat('yyyy/MM/dd').format(supplier.createdAt)),
            ],
          ),
        ),
        actions: [TextButton(onPressed: () => Navigator.pop(ctx), child: const Text('閉じる'))],
      ),
    );
  }

  Widget _detailRow(String label, String value) {
    return Padding(
      padding: const EdgeInsets.only(bottom: 12),
      child: Row(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          SizedBox(width: 100),
          Expanded(
            child: Column(
              crossAxisAlignment: CrossAxisAlignment.start,
              children: [
                Text(label, style: TextStyle(fontWeight: FontWeight.bold)),
                if (value != '-') Text(value),
              ],
            ),
          ),
        ],
      ),
    );
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('/M3. 仕入先マスタ'),
        actions: [IconButton(icon: const Icon(Icons.refresh), onPressed: _loadSuppliers)],
      ),
      body: _isLoading ? const Center(child: CircularProgressIndicator()) :
            _suppliers.isEmpty ? Center(
              child: Column(
                mainAxisAlignment: MainAxisAlignment.center,
                children: [
                  Icon(Icons.inbox_outlined, size: 64, color: Colors.grey[300]),
                  SizedBox(height: 16),
                  Text('仕入先データがありません', style: TextStyle(color: Colors.grey)),
                  SizedBox(height: 16),
                  FloatingActionButton.extended(
                    icon: Icon(Icons.add, color: Theme.of(context).primaryColor),
                    label: const Text('新規登録'),
                    onPressed: () => _showAddDialog(context),
                  ),
                ],
              ),
            )
          : ListView.builder(
              padding: const EdgeInsets.all(8),
              itemCount: _suppliers.length,
              itemBuilder: (context, index) {
                final supplier = _suppliers[index];
                return Card(
                  margin: const EdgeInsets.only(bottom: 8),
                  elevation: 4,
                  child: ListTile(
                    leading: CircleAvatar(backgroundColor: Colors.orange.shade100, child: Icon(Icons.business, color: Colors.orange)),
                    title: Text(supplier.name ?? '未入力'),
                    subtitle: Column(
                      crossAxisAlignment: CrossAxisAlignment.start,
                      children: [
                        if (supplier.productCode.isNotEmpty) Text('製品コード：${supplier.productCode}', style: const TextStyle(fontSize: 12)),
                        if (supplier.supplierPhoneNumber.isNotEmpty) Text('電話：${supplier.supplierPhoneNumber}', style: const TextStyle(fontSize: 12)),
                        if (supplier.email.isNotEmpty) Text('Email: ${supplier.email}', style: const TextStyle(fontSize: 12)),
                        Text('評価：★'.repeat(supplier.quantity.toInt() > 0 ? supplier.quantity.toInt() : 1), style: const TextStyle(color: Colors.orange, fontSize: 12)),
                      ],
                    ),
                    trailing: Row(
                      mainAxisSize: MainAxisSize.min,
                      children: [
                        IconButton(icon: Icon(Icons.edit, color: Colors.blue), onPressed: () => _editSupplier(supplier)),
                        PopupMenuButton<String>(
                          onSelected: (value) => value == 'delete' ? _deleteSupplier(supplier.id ?? 0) : null,
                          itemBuilder: (ctx) => [
                            const PopupMenuItem(child: Text('詳細'), onPressed: () => _showSupplierDetail(context, supplier)),
                            const PopupMenuItem(child: Text('削除'), onPressed: () => _deleteSupplier(supplier.id ?? 0)),
                          ],
                        ),
                      ],
                    ),
                  ),
                );
              },
            ),
      floatingActionButton: FloatingActionButton.extended(
        icon: const Icon(Icons.add),
        label: const Text('新規登録'),
        onPressed: () => _showAddDialog(context),
      ),
    );
  }

  void _showAddDialog(BuildContext context) {
    showDialog(
      context: context,
      builder: (ctx) => Dialog(
        child: SingleChildScrollView(
          child: Column(
            mainAxisSize: MainAxisSize.min,
            crossAxisAlignment: CrossAxisAlignment.stretch,
            children: [
              Padding(
                padding: const EdgeInsets.all(16),
                child: Text(
                  '新規仕入先登録',
                  style: Theme.of(context).textTheme.titleLarge?.copyWith(fontWeight: FontWeight.bold),
                ),
              ),

              MasterTextField(
                label: '製品コード *',
                controller: TextEditingController(),
                hintText: '例：S-001, SAN-002 など（半角英数字）',
              ),

              const SizedBox(height: 16),

              MasterTextField(
                label: '会社名 *',
                controller: TextEditingController(),
                hintText: '例：株式会社〇〇商事、個人商社で可',
              ),

              const SizedBox(height: 16),

              MasterTextField(
                label: '担当者名',
                controller: TextEditingController(),
                hintText: '例：田中太郎（日本語漢字可）',
              ),

              const SizedBox(height: 16),

              // 電話番号フィールド - 電話帳連携対応
              MasterTextField(
                label: '電話番号',
                controller: TextEditingController(),
                keyboardType: TextInputType.phone,
                hintText: '例：03-1234-5678、区切り不要（0312345678）',
                phoneField: 'supplierPhoneNumber', // 電話帳連携用
              ),

              const SizedBox(height: 16),

              MasterTextField(
                label: 'メールアドレス',
                controller: TextEditingController(),
                keyboardType: TextInputType.emailAddress,
                hintText: '@example.com の形式（例：order@ooshouki.co.jp）',
              ),

              const SizedBox(height: 16),

              MasterTextField(
                label: '住所',
                controller: TextEditingController(),
                hintText: '〒000-0000 市区町村名・番地・建物名',
              ),

              const SizedBox(height: 16),

              MasterNumberField(
                label: '評価ポイント *',
                controller: TextEditingController(),
                hintText: '1-5 の範囲（例：3）',
              ),

              const SizedBox(height: 16),

              MasterDateField(
                label: '登録日',
                controller: TextEditingController(text: DateFormat('yyyy/MM/dd').format(DateTime.now())),
              ),
            ],
          ),
        ),
      ),
    );
  }
}

/// 仕入先マスタ用詳細表示ダイアログ（電話帳対応）
class SupplierDetailDialog extends StatelessWidget {
  final Product supplier;

  const SupplierDetailDialog({super.key, required this.supplier});

  @override
  Widget build(BuildContext context) {
    return AlertDialog(
      title: const Text('仕入先詳細'),
      content: SingleChildScrollView(
        child: Column(
          mainAxisSize: MainAxisSize.min,
          crossAxisAlignment: CrossAxisAlignment.start,
          children: [
            _detailRow('製品コード', supplier.productCode ?? '-'),
            _detailRow('会社名', supplier.name ?? '-'),
            if (supplier.supplierContactName.isNotEmpty) _detailRow('担当者名', supplier.supplierContactName),
            _detailRow('電話番号', supplier.supplierPhoneNumber.isNotEmpty ? supplier.supplierPhoneNumber : '-'),
            if (supplier.email.isNotEmpty) _detailRow('Email', supplier.email),
            if (supplier.address.isNotEmpty) _detailRow('住所', supplier.address),
            _detailRow('評価ポイント', '★'.repeat(supplier.quantity.toInt() > 0 ? supplier.quantity.toInt() : 1)),
            _detailRow('登録日', DateFormat('yyyy/MM/dd').format(supplier.createdAt)),
          ],
        ),
      ),
      actions: [TextButton(onPressed: () => Navigator.pop(context), child: const Text('閉じる'))],
    );
  }

  Widget _detailRow(String label, String value) {
    return Padding(
      padding: const EdgeInsets.only(bottom: 12),
      child: Row(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          SizedBox(width: 100),
          Expanded(
            child: Column(
              crossAxisAlignment: CrossAxisAlignment.start,
              children: [
                Text(label, style: TextStyle(fontWeight: FontWeight.bold)),
                if (value != '-') Text(value),
              ],
            ),
          ),
        ],
      ),
    );
  }
}