import 'package:flutter/material.dart';
import 'screens/estimate_screen.dart';
import 'screens/invoice_screen.dart';
import 'screens/order_screen.dart';
import 'screens/sales_return_screen.dart';
import 'screens/sales_screen.dart';
import 'screens/master/product_master_screen.dart';
import 'screens/master/customer_master_screen.dart';
import 'screens/master/supplier_master_screen.dart';
import 'screens/master/warehouse_master_screen.dart';
import 'screens/master/employee_master_screen.dart';
import 'screens/master/inventory_master_screen.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'H-1Q',
      debugShowCheckedModeBanner: false,
      theme: ThemeData(useMaterial3: true),
      home: const Dashboard(),
      routes: {
        '/M1. 商品マスタ': (context) => const ProductMasterScreen(),
        '/M2. 得意先マスタ': (context) => const CustomerMasterScreen(),
        '/M3. 仕入先マスタ': (context) => const SupplierMasterScreen(),
        '/M4. 倉庫マスタ': (context) => const WarehouseMasterScreen(),
        '/M5. 担当者マスタ': (context) => const EmployeeMasterScreen(),
        '/S1. 見積入力': (context) => const EstimateScreen(),
        '/S2. 請求書発行': (context) => const InvoiceScreen(),
        '/S3. 発注入力': (context) => const OrderScreen(),
        '/S4. 売上入力（レジ）': (context) => const SalesScreen(),
        '/S5. 売上返品入力': (context) => const SalesReturnScreen(),
      },
    );
  }
}

class Dashboard extends StatefulWidget {
  const Dashboard({super.key});

  @override
  State<Dashboard> createState() => _DashboardState();
}

class _DashboardState extends State<Dashboard> {
  // カテゴリ展開状態管理
  bool _masterExpanded = true;

  final Color _headerColor = Colors.blue.shade50;
  final Color _iconColor = Colors.blue.shade700;
  final Color _accentColor = Colors.teal.shade400;

  /// カテゴリヘッダー部品
  Widget get _header {
    return Container(
      padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 12),
      color: _headerColor,
      child: Row(
        children: [
          Icon(Icons.inbox, color: _iconColor),
          const SizedBox(width: 8),
          Expanded(child: Text('マスタ管理', style: TextStyle(fontWeight: FontWeight.bold, fontSize: 16))),
          AnimatedSwitcher(
            duration: const Duration(milliseconds: 200),
            transitionBuilder: (Widget child, Animation<double> animation) {
              return ScaleTransition(
                scale: Tween(begin: 0.8, end: 1.0).animate(CurvedAnimation(parent: animation, curve: Curves.easeInOut)),
                child: FadeTransition(opacity: animation, child: child),
              );
            },
            child: IconButton(
              key: ValueKey('master'),
              icon: Icon(_masterExpanded ? Icons.keyboard_arrow_down : Icons.keyboard_arrow_up),
              padding: EdgeInsets.zero,
              constraints: const BoxConstraints(),
              onPressed: () => setState(() => _masterExpanded = !_masterExpanded),
            ),
          ),
        ],
      ),
    );
  }

  /// コンテンツ部品（展開時のみ）
  Widget? get _masterContent {
    if (!_masterExpanded) return null;
    return Container(
      color: Colors.white,
      child: Padding(
        padding: const EdgeInsets.only(top: 1, bottom: 8),
        child: ListView.builder(
          shrinkWrap: true,
          physics: NeverScrollableScrollPhysics(),
          itemCount: 6,
          itemBuilder: (context, index) {
            switch (index) {
              case 0: return Card(margin: const EdgeInsets.symmetric(horizontal: 16, vertical: 4), child: ListTile(leading: Icon(Icons.store, color: _accentColor), title: Text('M1. 商品マスタ'), subtitle: Text('実装済み'), onTap: () => Navigator.pushNamed(context, '/M1. 商品マスタ')));
              case 1: return Card(margin: const EdgeInsets.symmetric(horizontal: 16, vertical: 4), child: ListTile(leading: Icon(Icons.person, color: _accentColor), title: Text('M2. 得意先マスタ'), subtitle: Text('実装済み'), onTap: () => Navigator.pushNamed(context, '/M2. 得意先マスタ')));
              case 2: return Card(margin: const EdgeInsets.symmetric(horizontal: 16, vertical: 4), child: ListTile(leading: Icon(Icons.card_membership, color: _accentColor), title: Text('M3. 仕入先マスタ'), subtitle: Text('実装済み'), onTap: () => Navigator.pushNamed(context, '/M3. 仕入先マスタ')));
              case 3: return Card(margin: const EdgeInsets.symmetric(horizontal: 16, vertical: 4), child: ListTile(leading: Icon(Icons.storage, color: _accentColor), title: Text('M4. 倉庫マスタ'), subtitle: Text('実装済み'), onTap: () => Navigator.pushNamed(context, '/M4. 倉庫マスタ')));
              case 4: return Card(margin: const EdgeInsets.symmetric(horizontal: 16, vertical: 4), child: ListTile(leading: Icon(Icons.badge, color: _accentColor), title: Text('M5. 担当者マスタ'), subtitle: Text('実装済み'), onTap: () => Navigator.pushNamed(context, '/M5. 担当者マスタ')));
              case 5: return Card(margin: const EdgeInsets.symmetric(horizontal: 16, vertical: 4), child: ListTile(leading: Icon(Icons.inventory_2, color: _accentColor), title: Text('M6. 在庫管理'), subtitle: Text('実装済み'), onTap: () => Navigator.pushNamed(context, '/M6. 在庫管理')));
              default: return const SizedBox();
            }
          },
        ),
      ),
    );
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: const Text('H-1Q')),
      body: ListView(
        padding: EdgeInsets.zero,
        children: [_header, _masterContent ?? const SizedBox.shrink()],
      ),
    );
  }
}