import 'package:flutter/material.dart';
import 'package:provider/provider.dart';
import 'package:shadcn_ui/shadcn_ui.dart';
import 'package:superport/screens/common/theme_shadcn.dart';
import 'package:superport/screens/common/components/shadcn_components.dart';
import 'package:superport/screens/common/widgets/pagination.dart';
import 'package:superport/screens/common/widgets/standard_action_bar.dart';
import 'package:superport/screens/common/widgets/standard_states.dart';
import 'package:superport/screens/common/layouts/base_list_screen.dart';
import 'package:superport/screens/equipment/controllers/equipment_list_controller.dart';
import 'package:superport/models/equipment_unified_model.dart';
import 'package:superport/utils/constants.dart';
import 'package:superport/screens/equipment/widgets/equipment_history_dialog.dart';

/// shadcn/ui 스타일로 재설계된 장비 관리 화면
class EquipmentList extends StatefulWidget {
  final String currentRoute;

  const EquipmentList({super.key, this.currentRoute = Routes.equipment});

  @override
  State<EquipmentList> createState() => _EquipmentListState();
}

class _EquipmentListState extends State<EquipmentList> {
  late final EquipmentListController _controller;
  bool _showDetailedColumns = true;
  final TextEditingController _searchController = TextEditingController();
  final ScrollController _horizontalScrollController = ScrollController();
  String _selectedStatus = 'all';
  // String _searchKeyword = '';  // Removed - unused field
  String _appliedSearchKeyword = '';
  // 페이지 상태는 이제 Controller에서 관리
  final Set<int> _selectedItems = {};

  @override
  void initState() {
    super.initState();
    _controller = EquipmentListController();
    _controller.pageSize = 10;  // 페이지 크기 설정
    _setInitialFilter();
    
    // API 호출을 위해 Future로 변경
    WidgetsBinding.instance.addPostFrameCallback((_) {
      _controller.loadData(); // 비동기 호출
    });
  }

  @override
  void dispose() {
    _searchController.dispose();
    _horizontalScrollController.dispose();
    _controller.dispose();
    super.dispose();
  }

  @override
  void didChangeDependencies() {
    super.didChangeDependencies();
    _adjustColumnsForScreenSize();
  }

  /// 화면 크기에 따라 컬럼 표시 조정
  void _adjustColumnsForScreenSize() {
    final width = MediaQuery.of(context).size.width;
    setState(() {
      _showDetailedColumns = width > 900;
    });
  }

  /// 라우트에 따른 초기 필터 설정
  void _setInitialFilter() {
    switch (widget.currentRoute) {
      case Routes.equipmentInList:
        _selectedStatus = 'in';
        _controller.selectedStatusFilter = EquipmentStatus.in_;
        break;
      case Routes.equipmentOutList:
        _selectedStatus = 'out';
        _controller.selectedStatusFilter = EquipmentStatus.out;
        break;
      case Routes.equipmentRentList:
        _selectedStatus = 'rent';
        _controller.selectedStatusFilter = EquipmentStatus.rent;
        break;
      default:
        _selectedStatus = 'all';
        _controller.selectedStatusFilter = null;
    }
    print('DEBUG: Initial filter set - route: ${widget.currentRoute}, status: $_selectedStatus, filter: ${_controller.selectedStatusFilter}'); // 디버그 정보
  }


  /// 상태 필터 변경
  Future<void> _onStatusFilterChanged(String status) async {
    setState(() {
      _selectedStatus = status;
      // 상태 필터를 EquipmentStatus 상수로 변환
      switch (status) {
        case 'all':
          _controller.selectedStatusFilter = null;
          break;
        case 'in':
          _controller.selectedStatusFilter = EquipmentStatus.in_;
          break;
        case 'out':
          _controller.selectedStatusFilter = EquipmentStatus.out;
          break;
        case 'rent':
          _controller.selectedStatusFilter = EquipmentStatus.rent;
          break;
        case 'repair':
          _controller.selectedStatusFilter = EquipmentStatus.repair;
          break;
        case 'damaged':
          _controller.selectedStatusFilter = EquipmentStatus.damaged;
          break;
        case 'lost':
          _controller.selectedStatusFilter = EquipmentStatus.lost;
          break;
        case 'disposed':
          _controller.selectedStatusFilter = EquipmentStatus.disposed;
          break;
        default:
          _controller.selectedStatusFilter = null;
      }
      _controller.goToPage(1);
    });
    _controller.changeStatusFilter(_controller.selectedStatusFilter);
  }

  /// 검색 실행
  void _onSearch() async {
    setState(() {
      _appliedSearchKeyword = _searchController.text;
      _controller.goToPage(1);
    });
    _controller.updateSearchKeyword(_searchController.text);
  }


  /// 전체 선택/해제
  void _onSelectAll(bool? value) {
    setState(() {
      final equipments = _getFilteredEquipments();
      for (final equipment in equipments) {
        _controller.selectEquipment(equipment);
      }
    });
  }

  /// 전체 선택 상태 확인
  bool _isAllSelected() {
    final equipments = _getFilteredEquipments();
    if (equipments.isEmpty) return false;
    return equipments.every((e) => 
      _controller.selectedEquipmentIds.contains('${e.id}:${e.status}'));
  }


  /// 필터링된 장비 목록 반환
  List<UnifiedEquipment> _getFilteredEquipments() {
    // 서버에서 이미 페이지네이션된 데이터를 사용
    var equipments = _controller.equipments;

    // 로컬 검색 키워드 적용 (서버 검색과 병행)
    // 서버에서 검색된 결과에 추가 로컬 필터링
    if (_appliedSearchKeyword.isNotEmpty) {
      equipments = equipments.where((e) {
        final keyword = _appliedSearchKeyword.toLowerCase();
        return [
          e.equipment.model?.vendor?.name ?? '',  // Vendor 이름
          e.equipment.serialNumber ?? '',         // 시리얼 번호 (메인 필드)
          e.equipment.model?.name ?? '',          // Model 이름
          e.equipment.serialNumber ?? '',         // 시리얼 번호 (중복 제거)
          e.equipment.barcode ?? '',              // 바코드
          e.equipment.remark ?? '',               // 비고
        ].any((field) => field.toLowerCase().contains(keyword.toLowerCase()));
      }).toList();
    }

    return equipments;
  }

  /// 출고 처리 버튼 핸들러
  void _handleOutEquipment() async {
    if (_controller.getSelectedInStockCount() == 0) {
      ShadToaster.of(context).show(
        const ShadToast(
          title: Text('알림'),
          description: Text('출고할 장비를 선택해주세요.'),
        ),
      );
      return;
    }

    // 선택된 장비들의 요약 정보를 가져와서 출고 폼으로 전달
    final selectedEquipmentsSummary = _controller.getSelectedEquipmentsSummary();

    final result = await Navigator.pushNamed(
      context,
      Routes.equipmentOutAdd,
      arguments: {'selectedEquipments': selectedEquipmentsSummary},
    );

    if (result == true) {
      setState(() {
        _controller.loadData(isRefresh: true);
        _controller.goToPage(1);
      });
    }
  }

  /// 대여 처리 버튼 핸들러
  void _handleRentEquipment() async {
    if (_controller.getSelectedInStockCount() == 0) {
      ShadToaster.of(context).show(
        const ShadToast(
          title: Text('알림'),
          description: Text('대여할 장비를 선택해주세요.'),
        ),
      );
      return;
    }

    final selectedEquipmentsSummary = _controller.getSelectedEquipmentsSummary();
    ShadToaster.of(context).show(
      ShadToast(
        title: const Text('알림'),
        description: Text('${selectedEquipmentsSummary.length}개 장비 대여 기능은 준비 중입니다.'),
      ),
    );
  }

  /// 폐기 처리 버튼 핸들러
  void _handleDisposeEquipment() async {
    final selectedEquipments = _controller.getSelectedEquipments()
        .where((equipment) => equipment.status != EquipmentStatus.disposed)
        .toList();
        
    if (selectedEquipments.isEmpty) {
      ShadToaster.of(context).show(
        const ShadToast(
          title: Text('알림'),
          description: Text('폐기할 장비를 선택해주세요. (이미 폐기된 장비는 제외)'),
        ),
      );
      return;
    }

    // 폐기 사유 입력을 위한 컨트롤러
    final TextEditingController reasonController = TextEditingController();

    final result = await showShadDialog<bool>(
      context: context,
      builder: (context) => ShadDialog(
        title: const Text('폐기 확인'),
        description: SingleChildScrollView(
          child: Column(
            mainAxisSize: MainAxisSize.min,
            crossAxisAlignment: CrossAxisAlignment.start,
            children: [
              Text('선택한 ${selectedEquipments.length}개 장비를 폐기하시겠습니까?'),
              const SizedBox(height: 16),
              const Text('폐기할 장비 목록:', style: TextStyle(fontWeight: FontWeight.bold)),
              const SizedBox(height: 8),
              ...selectedEquipments.map((unifiedEquipment) {
                final equipment = unifiedEquipment.equipment;
                return Padding(
                  padding: const EdgeInsets.only(bottom: 8.0),
                  child: Text(
                    '${equipment.model?.vendor?.name ?? 'N/A'} ${equipment.serialNumber}', // Vendor + Equipment Number
                    style: const TextStyle(fontSize: 14),
                  ),
                );
              }),
              const SizedBox(height: 16),
              const Text('폐기 사유:', style: TextStyle(fontWeight: FontWeight.bold)),
              const SizedBox(height: 8),
              ShadInputFormField(
                controller: reasonController,
                placeholder: const Text('폐기 사유를 입력해주세요'),
                maxLines: 2,
              ),
            ],
          ),
        ),
        actions: [
          ShadButton(
            onPressed: () => Navigator.pop(context, false),
            child: const Text('취소'),
          ),
          ShadButton.destructive(
            onPressed: () => Navigator.pop(context, true),
            child: const Text('폐기'),
          ),
        ],
      ),
    );

    if (result == true) {
      // 로딩 다이얼로그 표시
      showShadDialog(
        context: context,
        barrierDismissible: false,
        builder: (context) => const ShadDialog(
          child: Center(
            child: ShadProgress(),
          ),
        ),
      );

      try {
        await _controller.disposeSelectedEquipments(
          reason: reasonController.text.isNotEmpty ? reasonController.text : null,
        );

        if (mounted) {
          Navigator.pop(context); // 로딩 다이얼로그 닫기
          ShadToaster.of(context).show(
            const ShadToast(
              title: Text('폐기 완료'),
              description: Text('선택한 장비가 폐기 처리되었습니다.'),
            ),
          );
          setState(() {
            _controller.loadData(isRefresh: true);
          });
        }
      } catch (e) {
        if (mounted) {
          Navigator.pop(context); // 로딩 다이얼로그 닫기
          ShadToaster.of(context).show(
            ShadToast.destructive(
              title: const Text('폐기 실패'),
              description: Text(e.toString()),
            ),
          );
        }
      }
    }

    reasonController.dispose();
  }

  /// 편집 핸들러
  void _handleEdit(UnifiedEquipment equipment) async {
    // 디버그: 실제 상태 값 확인
    print('DEBUG: equipment.status = ${equipment.status}');
    print('DEBUG: equipment.id = ${equipment.id}');
    print('DEBUG: equipment.equipment.id = ${equipment.equipment.id}');
    
    // 모든 상태의 장비 수정 가능
    // equipment.equipment.id를 사용해야 실제 장비 ID임
    final result = await Navigator.pushNamed(
      context,
      Routes.equipmentInEdit,
      arguments: equipment.equipment.id ?? equipment.id,  // 실제 장비 ID 전달
    );
    if (result == true) {
      setState(() {
        _controller.loadData(isRefresh: true);
        _controller.goToPage(1);
      });
    }
  }

  /// 삭제 핸들러
  void _handleDelete(UnifiedEquipment equipment) {
    showShadDialog(
      context: context,
      builder: (context) => ShadDialog(
        title: const Text('삭제 확인'),
        description: const Text('이 장비 정보를 삭제하시겠습니까?'),
        actions: [
          ShadButton(
            onPressed: () => Navigator.pop(context),
            child: const Text('취소'),
          ),
          ShadButton(
            onPressed: () async {
              Navigator.pop(context);
              try {
                // Controller를 통한 삭제 처리 (내부에서 refresh() 호출)
                await _controller.deleteEquipment(equipment.equipment.id!, equipment.status);
                
                if (mounted) {
                  ShadToaster.of(context).show(
                    ShadToast(
                      title: const Text('장비 삭제'),
                      description: const Text('장비가 삭제되었습니다.'),
                    ),
                  );
                }
              } catch (e) {
                if (mounted) {
                  ShadToaster.of(context).show(
                    ShadToast.destructive(
                      title: const Text('삭제 실패'),
                      description: Text(e.toString()),
                    ),
                  );
                }
              }
            },
            child: const Text('삭제'),
          ),
        ],
      ),
    );
  }


  @override
  Widget build(BuildContext context) {
    return ChangeNotifierProvider<EquipmentListController>.value(
      value: _controller,
      child: Consumer<EquipmentListController>(
        builder: (context, controller, child) {
          // 선택된 장비 개수
          final int selectedCount = controller.getSelectedEquipmentCount();
          final int selectedInCount = controller.getSelectedInStockCount();
          final int selectedOutCount = controller.getSelectedEquipmentCountByStatus(EquipmentStatus.out);
          final int selectedRentCount = controller.getSelectedEquipmentCountByStatus(EquipmentStatus.rent);
          
          final filteredEquipments = _getFilteredEquipments();
          // 백엔드 API에서 제공하는 실제 전체 아이템 수 사용
          final totalCount = controller.total;

          return BaseListScreen(
            isLoading: controller.isLoading && controller.equipments.isEmpty,
            error: controller.error,
            onRefresh: () => controller.loadData(isRefresh: true),
            emptyMessage:
                _appliedSearchKeyword.isNotEmpty
                    ? '검색 결과가 없습니다'
                    : '등록된 장비가 없습니다',
            emptyIcon: Icons.inventory_2_outlined,

            // 검색바
            searchBar: _buildSearchBar(),

            // 액션바
            actionBar: _buildActionBar(selectedCount, selectedInCount, selectedOutCount, selectedRentCount, totalCount),

            // 데이터 테이블
            dataTable: _buildDataTable(filteredEquipments),

            // 페이지네이션
            pagination: controller.totalPages > 1 ? Pagination(
              totalCount: controller.total,
              currentPage: controller.currentPage,
              pageSize: controller.pageSize,
              onPageChanged: (page) {
                controller.goToPage(page);
              },
            ) : null,
          );
        },
      ),
    );
  }

  /// 검색 바
  Widget _buildSearchBar() {
    return Row(
      children: [
        // 검색 입력
        Expanded(
          flex: 2,
          child: Container(
            height: 40,
            decoration: BoxDecoration(
              color: ShadcnTheme.card,
              borderRadius: BorderRadius.circular(ShadcnTheme.radiusMd),
              border: Border.all(color: Colors.black),
            ),
            child: TextField(
              controller: _searchController,
              onSubmitted: (_) => _onSearch(),
              decoration: InputDecoration(
                hintText: '제조사, 모델명, 시리얼번호, 바코드 등...',
                hintStyle: TextStyle(color: ShadcnTheme.mutedForeground.withValues(alpha: 0.8), fontSize: 14),
                prefixIcon: Icon(Icons.search, color: ShadcnTheme.muted, size: 20),
                border: InputBorder.none,
                contentPadding: const EdgeInsets.symmetric(horizontal: 12, vertical: 8),
              ),
              style: ShadcnTheme.bodyMedium,
            ),
          ),
        ),

        const SizedBox(width: 16),

        // 검색 버튼
        SizedBox(
          height: 40,
          child: ShadcnButton(
            text: '검색',
            onPressed: _onSearch,
            variant: ShadcnButtonVariant.primary,
            textColor: Colors.white,
            icon: const Icon(Icons.search, size: 16),
          ),
        ),

        const SizedBox(width: 16),

        // 상태 필터 드롭다운 (캐시된 데이터 사용)
        SizedBox(
          height: 40,
          width: 150,
          child: ShadSelect<String>(
            selectedOptionBuilder: (context, value) => Text(
              _getStatusDisplayText(value),
              style: const TextStyle(fontSize: 14),
            ),
            placeholder: const Text('상태 선택'),
            options: _buildStatusSelectOptions(),
            onChanged: (value) {
              if (value != null) {
                _onStatusFilterChanged(value);
              }
            },
          ),
        ),
      ],
    );
  }

  /// 액션바
  Widget _buildActionBar(int selectedCount, int selectedInCount, int selectedOutCount, int selectedRentCount, int totalCount) {
    return StandardActionBar(
      leftActions: [
        // 라우트별 액션 버튼
        _buildRouteSpecificActions(selectedInCount, selectedOutCount, selectedRentCount),
      ],
      rightActions: [
        // 관리자용 비활성 포함 체크박스
        // TODO: 실제 권한 체크 로직 추가 필요
        Row(
          children: [
            ShadCheckbox(
              value: _controller.includeInactive,
              onChanged: (_) => setState(() {
                _controller.toggleIncludeInactive();
              }),
            ),
            const SizedBox(width: 8),
            const Text('비활성 포함'),
          ],
        ),
      ],
      totalCount: totalCount,
      selectedCount: selectedCount,
      onRefresh: () {
        setState(() {
          _controller.loadData();
          _controller.goToPage(1);
        });
      },
      statusMessage:
          _appliedSearchKeyword.isNotEmpty
              ? '"$_appliedSearchKeyword" 검색 결과'
              : null,
    );
  }

  /// 라우트별 액션 버튼
  Widget _buildRouteSpecificActions(int selectedInCount, int selectedOutCount, int selectedRentCount) {
    switch (widget.currentRoute) {
      case Routes.equipmentInList:
        return Row(
          children: [
            ShadcnButton(
              text: '출고',
              onPressed: selectedInCount > 0 ? _handleOutEquipment : null,
              variant: selectedInCount > 0 ? ShadcnButtonVariant.primary : ShadcnButtonVariant.secondary,
              icon: const Icon(Icons.exit_to_app, size: 16),
            ),
            const SizedBox(width: 8),
            ShadcnButton(
              text: '입고',
              onPressed: () async {
                final result = await Navigator.pushNamed(
                  context,
                  Routes.equipmentInAdd,
                );
                if (result == true) {
                  // 입고 완료 후 데이터 새로고침 (중복 방지)
                  _controller.refresh();
                }
              },
              variant: ShadcnButtonVariant.primary,
              textColor: Colors.white,
              icon: const Icon(Icons.add, size: 16),
            ),
          ],
        );
      case Routes.equipmentOutList:
        return Row(
          children: [
            ShadcnButton(
              text: '재입고',
              onPressed: selectedOutCount > 0 
                ? () => ShadToaster.of(context).show(
                    const ShadToast(
                      title: Text('알림'),
                      description: Text('재입고 기능은 준비 중입니다.'),
                    ),
                  )
                : null,
              variant: selectedOutCount > 0 ? ShadcnButtonVariant.primary : ShadcnButtonVariant.secondary,
              icon: const Icon(Icons.assignment_return, size: 16),
            ),
            const SizedBox(width: 8),
            ShadcnButton(
              text: '수리 요청',
              onPressed: selectedOutCount > 0
                ? () => ShadToaster.of(context).show(
                    const ShadToast(
                      title: Text('알림'),
                      description: Text('수리 요청 기능은 준비 중입니다.'),
                    ),
                  )
                : null,
              variant: selectedOutCount > 0 ? ShadcnButtonVariant.destructive : ShadcnButtonVariant.secondary,
              icon: const Icon(Icons.build, size: 16),
            ),
          ],
        );
      case Routes.equipmentRentList:
        return Row(
          children: [
            ShadcnButton(
              text: '반납',
              onPressed: selectedRentCount > 0
                ? () => ShadToaster.of(context).show(
                    const ShadToast(
                      title: Text('알림'),
                      description: Text('대여 반납 기능은 준비 중입니다.'),
                    ),
                  )
                : null,
              variant: selectedRentCount > 0 ? ShadcnButtonVariant.primary : ShadcnButtonVariant.secondary,
              icon: const Icon(Icons.keyboard_return, size: 16),
            ),
            const SizedBox(width: 8),
            ShadcnButton(
              text: '연장',
              onPressed: selectedRentCount > 0
                ? () => ShadToaster.of(context).show(
                    const ShadToast(
                      title: Text('알림'),
                      description: Text('대여 연장 기능은 준비 중입니다.'),
                    ),
                  )
                : null,
              variant: selectedRentCount > 0 ? ShadcnButtonVariant.primary : ShadcnButtonVariant.secondary,
              icon: const Icon(Icons.date_range, size: 16),
            ),
          ],
        );
      default:
        return Row(
          children: [
            ShadcnButton(
              text: '입고',
              onPressed: () async {
                final result = await Navigator.pushNamed(
                  context,
                  Routes.equipmentInAdd,
                );
                if (result == true) {
                  // 입고 완료 후 데이터 새로고침 (중복 방지)
                  _controller.refresh();
                }
              },
              variant: ShadcnButtonVariant.primary,
              textColor: Colors.white,
              icon: const Icon(Icons.add, size: 16),
            ),
            const SizedBox(width: 8),
            ShadcnButton(
              text: '출고 처리',
              onPressed: selectedInCount > 0 ? _handleOutEquipment : null,
              variant: selectedInCount > 0 ? ShadcnButtonVariant.primary : ShadcnButtonVariant.secondary,
              textColor: selectedInCount > 0 ? Colors.white : null,
              icon: const Icon(Icons.local_shipping, size: 16),
            ),
            const SizedBox(width: 8),
            ShadcnButton(
              text: '대여 처리',
              onPressed: selectedInCount > 0 ? _handleRentEquipment : null,
              variant: selectedInCount > 0 ? ShadcnButtonVariant.secondary : ShadcnButtonVariant.secondary,
              icon: const Icon(Icons.assignment, size: 16),
            ),
            const SizedBox(width: 8),
            ShadcnButton(
              text: '폐기 처리',
              onPressed: selectedInCount > 0 ? _handleDisposeEquipment : null,
              variant: selectedInCount > 0 ? ShadcnButtonVariant.destructive : ShadcnButtonVariant.secondary,
              icon: const Icon(Icons.delete, size: 16),
            ),
          ],
        );
    }
  }


  /// 최소 테이블 너비 계산
  double _getMinimumTableWidth(List<UnifiedEquipment> pagedEquipments) {
    double totalWidth = 0;
    
    // 기본 컬럼들 (리스트 API에서 제공하는 데이터만)
    totalWidth += 40;  // 체크박스
    totalWidth += 50;  // 번호
    totalWidth += 120; // 제조사
    totalWidth += 120; // 장비번호
    totalWidth += 120; // 모델명
    totalWidth += 50;  // 수량
    totalWidth += 70;  // 상태
    totalWidth += 80;  // 입출고일
    totalWidth += 90;  // 관리
    
    // 상세 컬럼들 (조건부)
    if (_showDetailedColumns) {
      totalWidth += 120; // 시리얼번호
    }
    
    // padding 추가 (좌우 각 16px)
    totalWidth += 32;
    
    return totalWidth;
  }

  /// 헤더 셀 빌더
  Widget _buildHeaderCell(
    String text, {
    required int flex,
    required bool useExpanded,
    required double minWidth,
  }) {
    final child = Container(
      alignment: Alignment.centerLeft,
      child: Text(
        text,
        style: TextStyle(fontSize: 13, fontWeight: FontWeight.w500),
      ),
    );

    if (useExpanded) {
      return Expanded(flex: flex, child: child);
    } else {
      return SizedBox(width: minWidth, child: child);
    }
  }

  /// 데이터 셀 빌더
  Widget _buildDataCell(
    Widget child, {
    required int flex,
    required bool useExpanded,
    required double minWidth,
  }) {
    final container = Container(
      alignment: Alignment.centerLeft,
      child: child,
    );

    if (useExpanded) {
      return Expanded(flex: flex, child: container);
    } else {
      return SizedBox(width: minWidth, child: container);
    }
  }

  /// 유연한 테이블 빌더 - Virtual Scrolling 적용
  Widget _buildFlexibleTable(List<UnifiedEquipment> pagedEquipments, {required bool useExpanded}) {
    final hasOutOrRent = pagedEquipments.any((e) => 
      e.status == EquipmentStatus.out || e.status == EquipmentStatus.rent
    );

    // 헤더를 별도로 빌드
    Widget header = Container(
      padding: const EdgeInsets.symmetric(
        horizontal: ShadcnTheme.spacing4,
        vertical: 10,
      ),
      decoration: BoxDecoration(
        color: ShadcnTheme.muted.withValues(alpha: 0.3),
        border: Border(
          bottom: BorderSide(color: Colors.black),
        ),
      ),
      child: Row(
        children: [
          // 체크박스
          _buildDataCell(
            ShadCheckbox(
              value: _isAllSelected(),
              onChanged: (bool? value) => _onSelectAll(value),
            ),
            flex: 1,
            useExpanded: useExpanded,
            minWidth: 40,
          ),
          // 번호
          _buildHeaderCell('번호', flex: 1, useExpanded: useExpanded, minWidth: 50),
          // 제조사
          _buildHeaderCell('제조사', flex: 3, useExpanded: useExpanded, minWidth: 120),
          // 장비번호
          _buildHeaderCell('장비번호', flex: 3, useExpanded: useExpanded, minWidth: 120),
          // 모델명
          _buildHeaderCell('모델명', flex: 3, useExpanded: useExpanded, minWidth: 120),
          // 상세 정보 (조건부) - 바코드로 변경
          if (_showDetailedColumns) ...[
            _buildHeaderCell('바코드', flex: 3, useExpanded: useExpanded, minWidth: 120),
          ],
          // 수량
          _buildHeaderCell('수량', flex: 1, useExpanded: useExpanded, minWidth: 50),
          // 재고 상태
          _buildHeaderCell('재고', flex: 2, useExpanded: useExpanded, minWidth: 80),
          // 상태
          _buildHeaderCell('상태', flex: 2, useExpanded: useExpanded, minWidth: 70),
          // 입출고일
          _buildHeaderCell('입출고일', flex: 2, useExpanded: useExpanded, minWidth: 80),
          // 관리
          _buildHeaderCell('관리', flex: 2, useExpanded: useExpanded, minWidth: 90),
        ],
      ),
    );

    // 빈 상태 처리
    if (pagedEquipments.isEmpty) {
      return Column(
        children: [
          header,
          Expanded(
            child: Center(
              child: Text(
                '데이터가 없습니다',
                style: ShadcnTheme.bodyMedium,
              ),
            ),
          ),
        ],
      );
    }

    // Virtual Scrolling을 위한 CustomScrollView 사용
    return Column(
      children: [
        header, // 헤더는 고정
        Expanded(
          child: ListView.builder(
            controller: ScrollController(),
            itemCount: pagedEquipments.length,
            itemBuilder: (context, index) {
              final UnifiedEquipment equipment = pagedEquipments[index];
              
              return Container(
                padding: const EdgeInsets.symmetric(
                  horizontal: ShadcnTheme.spacing4,
                  vertical: 4,
                ),
                decoration: BoxDecoration(
                  border: Border(
                    bottom: BorderSide(color: Colors.black),
                  ),
                ),
                child: Row(
                  children: [
                    // 체크박스
                    _buildDataCell(
                      ShadCheckbox(
                        value: _selectedItems.contains(equipment.equipment.id ?? 0),
                        onChanged: (bool? value) {
                          if (equipment.equipment.id != null) {
                            _onItemSelected(equipment.equipment.id!, value ?? false);
                          }
                        },
                      ),
                      flex: 1,
                      useExpanded: useExpanded,
                      minWidth: 40,
                    ),
                    // 번호
                    _buildDataCell(
                      Text(
                        '${((_controller.currentPage - 1) * _controller.pageSize) + index + 1}',
                        style: ShadcnTheme.bodySmall,
                      ),
                      flex: 1,
                      useExpanded: useExpanded,
                      minWidth: 50,
                    ),
                    // 제조사
                    _buildDataCell(
                      _buildTextWithTooltip(
                        equipment.equipment.model?.vendor?.name ?? 'N/A',
                        equipment.equipment.model?.vendor?.name ?? 'N/A',
                      ),
                      flex: 3,
                      useExpanded: useExpanded,
                      minWidth: 120,
                    ),
                    // 장비번호
                    _buildDataCell(
                      _buildTextWithTooltip(
                        equipment.equipment.serialNumber ?? '',
                        equipment.equipment.serialNumber ?? '',
                      ),
                      flex: 3,
                      useExpanded: useExpanded,
                      minWidth: 120,
                    ),
                    // 모델명
                    _buildDataCell(
                      _buildTextWithTooltip(
                        equipment.equipment.model?.name ?? '-',
                        equipment.equipment.model?.name ?? '-',
                      ),
                      flex: 3,
                      useExpanded: useExpanded,
                      minWidth: 120,
                    ),
                    // 상세 정보 (조건부) - 바코드로 변경
                    if (_showDetailedColumns) ...[
                      _buildDataCell(
                        _buildTextWithTooltip(
                          equipment.equipment.barcode ?? '-',
                          equipment.equipment.barcode ?? '-',
                        ),
                        flex: 3,
                        useExpanded: useExpanded,
                        minWidth: 120,
                      ),
                    ],
                    // 수량 (백엔드에서 관리하지 않으므로 고정값)
                    _buildDataCell(
                      Text(
                        '1',
                        style: ShadcnTheme.bodySmall,
                      ),
                      flex: 1,
                      useExpanded: useExpanded,
                      minWidth: 50,
                    ),
                    // 재고 상태
                    _buildDataCell(
                      _buildInventoryStatus(equipment),
                      flex: 2,
                      useExpanded: useExpanded,
                      minWidth: 80,
                    ),
                    // 상태
                    _buildDataCell(
                      _buildStatusBadge(equipment.status),
                      flex: 2,
                      useExpanded: useExpanded,
                      minWidth: 70,
                    ),
                    // 입출고일
                    _buildDataCell(
                      _buildCreatedDateWidget(equipment),
                      flex: 2,
                      useExpanded: useExpanded,
                      minWidth: 80,
                    ),
                    // 관리
                    _buildDataCell(
                      _buildActionButtons(equipment.equipment.id ?? 0),
                      flex: 2,
                      useExpanded: useExpanded,
                      minWidth: 90,
                    ),
                  ],
                ),
              );
            },
          ),
        ),
      ],
    );
  }

  /// 데이터 테이블
  Widget _buildDataTable(List<UnifiedEquipment> filteredEquipments) {
    // 백엔드에서 이미 페이지네이션된 데이터를 받으므로
    // 프론트엔드에서 추가 페이징 불필요
    final List<UnifiedEquipment> pagedEquipments = filteredEquipments;

    // 전체 데이터가 없는지 확인 (API의 total 사용)
    if (_controller.total == 0 && pagedEquipments.isEmpty) {
      return StandardEmptyState(
        title:
            _appliedSearchKeyword.isNotEmpty
                ? '검색 결과가 없습니다'
                : '등록된 장비가 없습니다',
        icon: Icons.inventory_2_outlined,
        action:
            _appliedSearchKeyword.isEmpty
                ? StandardActionButtons.addButton(
                  text: '첫 장비 추가하기',
                  onPressed: () async {
                    final result = await Navigator.pushNamed(
                      context,
                      Routes.equipmentInAdd,
                    );
                    if (result == true) {
                      setState(() {
                        _controller.loadData();
                        _controller.goToPage(1);
                      });
                    }
                  },
                )
                : null,
      );
    }

    return Container(
      width: double.infinity,
      decoration: BoxDecoration(
        border: Border.all(color: Colors.black),
        borderRadius: BorderRadius.circular(ShadcnTheme.radiusMd),
      ),
      child: LayoutBuilder(
        builder: (context, constraints) {
          final availableWidth = constraints.maxWidth;
          final minimumWidth = _getMinimumTableWidth(pagedEquipments);
          final needsHorizontalScroll = minimumWidth > availableWidth;

          if (needsHorizontalScroll) {
            // 최소 너비보다 작을 때만 스크롤 활성화
            return SingleChildScrollView(
              scrollDirection: Axis.horizontal,
              controller: _horizontalScrollController,
              child: SizedBox(
                width: minimumWidth,
                child: _buildFlexibleTable(pagedEquipments, useExpanded: false),
              ),
            );
          } else {
            // 충분한 공간이 있을 때는 Expanded 사용
            return _buildFlexibleTable(pagedEquipments, useExpanded: true);
          }
        },
      ),
    );
  }

  /// 텍스트와 툴팁 위젯 빌더
  Widget _buildTextWithTooltip(String text, String tooltip) {
    return Tooltip(
      message: tooltip,
      child: Text(
        text,
        style: ShadcnTheme.bodySmall,
        overflow: TextOverflow.ellipsis,
      ),
    );
  }

  /// 재고 상태 위젯 빌더 (백엔드 기반 단순화)
  Widget _buildInventoryStatus(UnifiedEquipment equipment) {
    // 백엔드 Equipment_History 기반으로 단순 상태만 표시
    Widget stockInfo;
    if (equipment.status == EquipmentStatus.in_) {
      // 입고 상태: 재고 있음
      stockInfo = Row(
        mainAxisSize: MainAxisSize.min,
        children: [
          Icon(Icons.check_circle, color: Colors.green, size: 16),
          const SizedBox(width: 4),
          Text(
            '보유중',
            style: ShadcnTheme.bodySmall.copyWith(color: Colors.green[700]),
          ),
        ],
      );
    } else if (equipment.status == EquipmentStatus.out) {
      // 출고 상태: 재고 없음
      stockInfo = Row(
        mainAxisSize: MainAxisSize.min,
        children: [
          Icon(Icons.warning, color: Colors.orange, size: 16),
          const SizedBox(width: 4),
          Text(
            '출고됨',
            style: ShadcnTheme.bodySmall.copyWith(color: Colors.orange[700]),
          ),
        ],
      );
    } else if (equipment.status == EquipmentStatus.rent) {
      // 대여 상태
      stockInfo = Row(
        mainAxisSize: MainAxisSize.min,
        children: [
          Icon(Icons.schedule, color: Colors.blue, size: 16),
          const SizedBox(width: 4),
          Text(
            '대여중',
            style: ShadcnTheme.bodySmall.copyWith(color: Colors.blue[700]),
          ),
        ],
      );
    } else {
      // 기타 상태
      stockInfo = Text(
        '-',
        style: ShadcnTheme.bodySmall,
      );
    }
    
    return stockInfo;
  }

  /// 상태 배지 빌더
  Widget _buildStatusBadge(String status) {
    String displayText;
    ShadcnBadgeVariant variant;

    switch (status) {
      case EquipmentStatus.in_:
        displayText = '입고';
        variant = ShadcnBadgeVariant.success;
        break;
      case EquipmentStatus.out:
        displayText = '출고';
        variant = ShadcnBadgeVariant.destructive;
        break;
      case EquipmentStatus.rent:
        displayText = '대여';
        variant = ShadcnBadgeVariant.warning;
        break;
      default:
        displayText = '알수없음';
        variant = ShadcnBadgeVariant.secondary;
    }

    return ShadcnBadge(
      text: displayText,
      variant: variant,
      size: ShadcnBadgeSize.small,
    );
  }

  /// 입출고일 위젯 빌더
  Widget _buildCreatedDateWidget(UnifiedEquipment equipment) {
    String dateStr = equipment.date.toString().substring(0, 10);
    return Text(
      dateStr,
      style: ShadcnTheme.bodySmall,
    );
  }


  /// 액션 버튼 빌더
  Widget _buildActionButtons(int equipmentId) {
    return Row(
      mainAxisSize: MainAxisSize.min,
      children: [
        Flexible(
          child: IconButton(
            constraints: const BoxConstraints(
              minWidth: 30,
              minHeight: 30,
            ),
            padding: const EdgeInsets.all(4),
            icon: const Icon(Icons.history, size: 16),
            onPressed: () => _showEquipmentHistoryDialog(equipmentId),
            tooltip: '이력',
          ),
        ),
        Flexible(
          child: IconButton(
            constraints: const BoxConstraints(
              minWidth: 30,
              minHeight: 30,
            ),
            padding: const EdgeInsets.all(4),
            icon: const Icon(Icons.edit_outlined, size: 16),
            onPressed: () => _handleEditById(equipmentId),
            tooltip: '편집',
          ),
        ),
        Flexible(
          child: IconButton(
            constraints: const BoxConstraints(
              minWidth: 30,
              minHeight: 30,
            ),
            padding: const EdgeInsets.all(4),
            icon: const Icon(Icons.delete_outline, size: 16),
            onPressed: () => _handleDeleteById(equipmentId),
            tooltip: '삭제',
          ),
        ),
      ],
    );
  }

  // 장비 이력 다이얼로그 표시
  void _showEquipmentHistoryDialog(int equipmentId) async {
    // 해당 장비 찾기
    final equipment = _controller.equipments.firstWhere(
      (e) => e.equipment.id == equipmentId,
      orElse: () => throw Exception('Equipment not found'),
    );
    
    // 팝업 다이얼로그로 이력 표시
    final result = await EquipmentHistoryDialog.show(
      context: context,
      equipmentId: equipmentId,
      equipmentName: '${equipment.equipment.model?.vendor?.name ?? 'N/A'} ${equipment.equipment.serialNumber}', // Vendor + Equipment Number
    );
    
    if (result == true) {
      _controller.loadData(isRefresh: true);
    }
  }


  // 편집 핸들러 (액션 버튼에서 호출) - 장비 ID로 처리
  void _handleEditById(int equipmentId) {
    // 해당 장비 찾기
    final equipment = _controller.equipments.firstWhere(
      (e) => e.equipment.id == equipmentId,
      orElse: () => throw Exception('Equipment not found'),
    );
    _handleEdit(equipment);
  }

  // 삭제 핸들러 (액션 버튼에서 호출) - 장비 ID로 처리
  void _handleDeleteById(int equipmentId) {
    // 해당 장비 찾기
    final equipment = _controller.equipments.firstWhere(
      (e) => e.equipment.id == equipmentId,
      orElse: () => throw Exception('Equipment not found'),
    );
    _handleDelete(equipment);
  }

  /// 체크박스 선택 관련 함수들
  void _onItemSelected(int id, bool selected) {
    setState(() {
      if (selected) {
        _selectedItems.add(id);
      } else {
        _selectedItems.remove(id);
      }
    });
  }


  // 사용하지 않는 카테고리 관련 함수들 제거됨 (리스트 API에서 제공하지 않음)

  /// 상태 표시 텍스트 가져오기
  String _getStatusDisplayText(String status) {
    switch (status) {
      case 'all':
        return '전체';
      case 'in':
        return '입고';
      case 'out':
        return '출고';
      case 'rent':
        return '대여';
      case 'repair':
        return '수리중';
      case 'damaged':
        return '손상';
      case 'lost':
        return '분실';
      case 'disposed':
        return '폐기';
      default:
        return '전체';
    }
  }

  /// 캐시된 데이터를 사용한 상태 선택 옵션 생성
  List<ShadOption<String>> _buildStatusSelectOptions() {
    List<ShadOption<String>> options = [
      const ShadOption(value: 'all', child: Text('전체')),
    ];

    // 캐시된 상태 데이터에서 선택 옵션 생성
    final cachedStatuses = _controller.getCachedEquipmentStatuses();
    
    for (final status in cachedStatuses) {
      options.add(
        ShadOption(
          value: status.id,
          child: Text(status.name),
        ),
      );
    }

    // 캐시된 데이터가 없을 때 폴백으로 하드코딩된 상태 사용
    if (cachedStatuses.isEmpty) {
      options.addAll([
        const ShadOption(value: 'in', child: Text('입고')),
        const ShadOption(value: 'out', child: Text('출고')),
        const ShadOption(value: 'rent', child: Text('대여')),
        const ShadOption(value: 'repair', child: Text('수리중')),
        const ShadOption(value: 'damaged', child: Text('손상')),
        const ShadOption(value: 'lost', child: Text('분실')),
        const ShadOption(value: 'disposed', child: Text('폐기')),
      ]);
    }

    return options;
  }

  // 사용하지 않는 현재위치, 점검일 관련 함수들 제거됨 (리스트 API에서 제공하지 않음)
}