import 'package:flutter/material.dart';
import 'package:superport/models/company_model.dart';
import 'package:superport/screens/common/theme_shadcn.dart';
import 'package:superport/screens/common/components/shadcn_components.dart';
import 'package:superport/services/mock_data_service.dart';
import 'package:superport/screens/company/widgets/company_branch_dialog.dart';

/// shadcn/ui 스타일로 재설계된 회사 관리 화면
class CompanyListRedesign extends StatefulWidget {
  const CompanyListRedesign({super.key});

  @override
  State<CompanyListRedesign> createState() => _CompanyListRedesignState();
}

class _CompanyListRedesignState extends State<CompanyListRedesign> {
  final MockDataService _dataService = MockDataService();
  List<Company> _companies = [];
  int _currentPage = 1;
  final int _pageSize = 10;

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

  /// 데이터 로드
  void _loadData() {
    setState(() {
      _companies = _dataService.getAllCompanies();
      _currentPage = 1;
    });
  }

  /// 회사 추가 화면으로 이동
  void _navigateToAddScreen() async {
    final result = await Navigator.pushNamed(context, '/company/add');
    if (result == true) {
      _loadData();
    }
  }

  /// 회사 삭제 처리
  void _deleteCompany(int id) {
    showDialog(
      context: context,
      builder:
          (context) => AlertDialog(
            title: const Text('삭제 확인'),
            content: const Text('이 회사 정보를 삭제하시겠습니까?'),
            actions: [
              TextButton(
                onPressed: () => Navigator.pop(context),
                child: const Text('취소'),
              ),
              TextButton(
                onPressed: () {
                  _dataService.deleteCompany(id);
                  Navigator.pop(context);
                  _loadData();
                },
                child: const Text('삭제'),
              ),
            ],
          ),
    );
  }

  /// 지점 다이얼로그 표시
  void _showBranchDialog(Company mainCompany) {
    showDialog(
      context: context,
      builder: (context) => CompanyBranchDialog(mainCompany: mainCompany),
    );
  }

  /// Branch 객체를 Company 객체로 변환
  Company _convertBranchToCompany(Branch branch) {
    return Company(
      id: branch.id,
      name: branch.name,
      address: branch.address,
      contactName: branch.contactName,
      contactPosition: branch.contactPosition,
      contactPhone: branch.contactPhone,
      contactEmail: branch.contactEmail,
      companyTypes: [],
      remark: branch.remark,
    );
  }

  /// 회사 유형 배지 생성
  Widget _buildCompanyTypeChips(List<CompanyType> types) {
    return Wrap(
      spacing: ShadcnTheme.spacing1,
      children:
          types.map((type) {
            return ShadcnBadge(
              text: companyTypeToString(type),
              variant:
                  type == CompanyType.customer
                      ? ShadcnBadgeVariant.primary
                      : ShadcnBadgeVariant.secondary,
              size: ShadcnBadgeSize.small,
            );
          }).toList(),
    );
  }

  /// 본사/지점 구분 배지 생성
  Widget _buildCompanyTypeLabel(bool isBranch) {
    return ShadcnBadge(
      text: isBranch ? '지점' : '본사',
      variant:
          isBranch ? ShadcnBadgeVariant.outline : ShadcnBadgeVariant.primary,
      size: ShadcnBadgeSize.small,
    );
  }

  /// 회사 이름 표시 (지점인 경우 본사명 포함)
  Widget _buildCompanyNameText(
    Company company,
    bool isBranch, {
    String? mainCompanyName,
  }) {
    if (isBranch && mainCompanyName != null) {
      return Text.rich(
        TextSpan(
          children: [
            TextSpan(text: '$mainCompanyName > ', style: ShadcnTheme.bodyMuted),
            TextSpan(text: company.name, style: ShadcnTheme.bodyMedium),
          ],
        ),
      );
    } else {
      return Text(company.name, style: ShadcnTheme.bodyMedium);
    }
  }

  @override
  Widget build(BuildContext context) {
    // 본사와 지점 구분하기 위한 데이터 준비
    final List<Map<String, dynamic>> displayCompanies = [];
    for (final company in _companies) {
      displayCompanies.add({
        'company': company,
        'isBranch': false,
        'mainCompanyName': null,
      });
      if (company.branches != null) {
        for (final branch in company.branches!) {
          displayCompanies.add({
            'branch': branch,
            'companyId': company.id,
            'isBranch': true,
            'mainCompanyName': company.name,
          });
        }
      }
    }

    // 페이지네이션 처리
    final int totalCount = displayCompanies.length;
    final int startIndex = (_currentPage - 1) * _pageSize;
    final int endIndex =
        (startIndex + _pageSize) > totalCount
            ? totalCount
            : (startIndex + _pageSize);
    final List<Map<String, dynamic>> pagedCompanies = displayCompanies.sublist(
      startIndex,
      endIndex,
    );

    return SingleChildScrollView(
      padding: const EdgeInsets.all(ShadcnTheme.spacing6),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          // 헤더 액션 바
          Row(
            mainAxisAlignment: MainAxisAlignment.spaceBetween,
            children: [
              Text('총 $totalCount개 회사', style: ShadcnTheme.bodyMuted),
              ShadcnButton(
                text: '회사 추가',
                onPressed: _navigateToAddScreen,
                variant: ShadcnButtonVariant.primary,
                textColor: Colors.white,
                icon: Icon(Icons.add),
              ),
            ],
          ),

          const SizedBox(height: ShadcnTheme.spacing4),

          // 테이블 카드
          Container(
            width: double.infinity,
            decoration: BoxDecoration(
              color: ShadcnTheme.card,
              borderRadius: BorderRadius.circular(ShadcnTheme.radiusLg),
              border: Border.all(color: ShadcnTheme.border),
              boxShadow: ShadcnTheme.cardShadow,
            ),
            child:
                pagedCompanies.isEmpty
                    ? Container(
                      padding: const EdgeInsets.all(ShadcnTheme.spacing8),
                      child: Center(
                        child: Column(
                          mainAxisAlignment: MainAxisAlignment.center,
                          children: [
                            Icon(
                              Icons.business_outlined,
                              size: 48,
                              color: ShadcnTheme.muted,
                            ),
                            const SizedBox(height: ShadcnTheme.spacing4),
                            Text('등록된 회사가 없습니다', style: ShadcnTheme.bodyMuted),
                          ],
                        ),
                      ),
                    )
                    : Column(
                      crossAxisAlignment: CrossAxisAlignment.start,
                      children: [
                        // 테이블 헤더
                        Container(
                          padding: const EdgeInsets.symmetric(
                            horizontal: ShadcnTheme.spacing4,
                            vertical: ShadcnTheme.spacing3,
                          ),
                          decoration: BoxDecoration(
                            color: ShadcnTheme.muted.withValues(alpha: 0.3),
                            border: Border(
                              bottom: BorderSide(color: ShadcnTheme.border),
                            ),
                          ),
                          child: Row(
                            children: [
                              Expanded(
                                flex: 1,
                                child: Text(
                                  '번호',
                                  style: ShadcnTheme.bodyMedium,
                                ),
                              ),
                              Expanded(
                                flex: 3,
                                child: Text(
                                  '회사명',
                                  style: ShadcnTheme.bodyMedium,
                                ),
                              ),
                              Expanded(
                                flex: 2,
                                child: Text(
                                  '구분',
                                  style: ShadcnTheme.bodyMedium,
                                ),
                              ),
                              Expanded(
                                flex: 2,
                                child: Text(
                                  '유형',
                                  style: ShadcnTheme.bodyMedium,
                                ),
                              ),
                              Expanded(
                                flex: 2,
                                child: Text(
                                  '연락처',
                                  style: ShadcnTheme.bodyMedium,
                                ),
                              ),
                              Expanded(
                                flex: 2,
                                child: Text(
                                  '관리',
                                  style: ShadcnTheme.bodyMedium,
                                ),
                              ),
                            ],
                          ),
                        ),

                        // 테이블 데이터
                        ...pagedCompanies.asMap().entries.map((entry) {
                          final int index = entry.key;
                          final companyData = entry.value;
                          final bool isBranch = companyData['isBranch'] as bool;
                          final Company company =
                              isBranch
                                  ? _convertBranchToCompany(companyData['branch'] as Branch)
                                  : companyData['company'] as Company;
                          final String? mainCompanyName =
                              companyData['mainCompanyName'] as String?;

                          return Container(
                            padding: const EdgeInsets.symmetric(
                              horizontal: ShadcnTheme.spacing4,
                              vertical: ShadcnTheme.spacing3,
                            ),
                            decoration: BoxDecoration(
                              border: Border(
                                bottom: BorderSide(color: ShadcnTheme.border),
                              ),
                            ),
                            child: Row(
                              children: [
                                // 번호
                                Expanded(
                                  flex: 1,
                                  child: Text(
                                    '${startIndex + index + 1}',
                                    style: ShadcnTheme.bodySmall,
                                  ),
                                ),

                                // 회사명
                                Expanded(
                                  flex: 3,
                                  child: _buildCompanyNameText(
                                    company,
                                    isBranch,
                                    mainCompanyName: mainCompanyName,
                                  ),
                                ),

                                // 구분
                                Expanded(
                                  flex: 2,
                                  child: _buildCompanyTypeLabel(isBranch),
                                ),

                                // 유형
                                Expanded(
                                  flex: 2,
                                  child: _buildCompanyTypeChips(
                                    company.companyTypes,
                                  ),
                                ),

                                // 연락처
                                Expanded(
                                  flex: 2,
                                  child: Text(
                                    company.contactPhone ?? '-',
                                    style: ShadcnTheme.bodySmall,
                                  ),
                                ),

                                // 관리
                                Expanded(
                                  flex: 2,
                                  child: Row(
                                    mainAxisSize: MainAxisSize.min,
                                    children: [
                                      if (!isBranch &&
                                          company.branches != null &&
                                          company.branches!.isNotEmpty)
                                        ShadcnButton(
                                          text: '지점보기',
                                          onPressed:
                                              () => _showBranchDialog(company),
                                          variant:
                                              ShadcnButtonVariant.secondary,
                                          size: ShadcnButtonSize.small,
                                        ),
                                      if (!isBranch &&
                                          company.branches != null &&
                                          company.branches!.isNotEmpty)
                                        const SizedBox(
                                          width: ShadcnTheme.spacing2,
                                        ),
                                      ShadcnButton(
                                        text: '수정',
                                        onPressed: company.id != null
                                            ? () {
                                                if (isBranch) {
                                                  Navigator.pushNamed(
                                                    context,
                                                    '/company/edit',
                                                    arguments: {
                                                      'companyId': companyData['companyId'],
                                                      'isBranch': true,
                                                      'mainCompanyName': mainCompanyName,
                                                      'branchId': company.id,
                                                    },
                                                  ).then((result) {
                                                    if (result == true) _loadData();
                                                  });
                                                } else {
                                                  Navigator.pushNamed(
                                                    context,
                                                    '/company/edit',
                                                    arguments: {
                                                      'companyId': company.id,
                                                      'isBranch': false,
                                                    },
                                                  ).then((result) {
                                                    if (result == true) _loadData();
                                                  });
                                                }
                                              }
                                            : null,
                                        variant: ShadcnButtonVariant.secondary,
                                        size: ShadcnButtonSize.small,
                                      ),
                                      const SizedBox(
                                        width: ShadcnTheme.spacing2,
                                      ),
                                      ShadcnButton(
                                        text: '삭제',
                                        onPressed:
                                            (!isBranch && company.id != null)
                                                ? () =>
                                                    _deleteCompany(company.id!)
                                                : null,
                                        variant:
                                            ShadcnButtonVariant.destructive,
                                        size: ShadcnButtonSize.small,
                                      ),
                                    ],
                                  ),
                                ),
                              ],
                            ),
                          );
                        }),
                      ],
                    ),
          ),

          // 페이지네이션
          if (totalCount > _pageSize)
            Container(
              padding: const EdgeInsets.symmetric(
                vertical: ShadcnTheme.spacing4,
              ),
              child: Row(
                mainAxisAlignment: MainAxisAlignment.center,
                children: [
                  // 이전 페이지 버튼
                  ShadcnButton(
                    text: '이전',
                    onPressed:
                        _currentPage > 1
                            ? () => setState(() => _currentPage--)
                            : null,
                    variant: ShadcnButtonVariant.secondary,
                    size: ShadcnButtonSize.small,
                  ),

                  const SizedBox(width: ShadcnTheme.spacing4),

                  // 페이지 정보
                  Text(
                    '$_currentPage / ${((totalCount - 1) ~/ _pageSize) + 1}',
                    style: ShadcnTheme.bodyMedium,
                  ),

                  const SizedBox(width: ShadcnTheme.spacing4),

                  // 다음 페이지 버튼
                  ShadcnButton(
                    text: '다음',
                    onPressed:
                        _currentPage < ((totalCount - 1) ~/ _pageSize) + 1
                            ? () => setState(() => _currentPage++)
                            : null,
                    variant: ShadcnButtonVariant.secondary,
                    size: ShadcnButtonSize.small,
                  ),
                ],
              ),
            ),
        ],
      ),
    );
  }
}