/// 회사 폼 컨트롤러
///
/// 회사 폼 화면의 비즈니스 로직을 담당하는 컨트롤러 클래스
/// 주요 기능:
/// - 회사 데이터 로드 및 저장
/// - 자동완성 처리
/// - 지점 정보 관리 (추가, 삭제, 수정)
/// - 전화번호 처리
/// - 중복 회사명 체크
/// - 회사 유형 관리
import 'package:flutter/material.dart';
import 'package:get_it/get_it.dart';
import 'package:superport/models/address_model.dart';
import 'package:superport/models/company_model.dart';
import 'package:superport/services/mock_data_service.dart';
import 'package:superport/services/company_service.dart';
import 'package:superport/core/errors/failures.dart';
import 'package:superport/utils/phone_utils.dart';
import 'dart:async';
import 'branch_form_controller.dart'; // 분리된 지점 컨트롤러 import

/// 회사 폼 컨트롤러 - 비즈니스 로직 처리
class CompanyFormController {
  final MockDataService dataService;
  final CompanyService _companyService = GetIt.instance<CompanyService>();
  final int? companyId;
  
  // Feature flag for API usage
  bool _useApi = true;

  final TextEditingController nameController = TextEditingController();
  Address companyAddress = const Address();
  final TextEditingController contactNameController = TextEditingController();
  final TextEditingController contactPositionController =
      TextEditingController();
  final TextEditingController contactPhoneController = TextEditingController();
  final TextEditingController contactEmailController = TextEditingController();
  final TextEditingController remarkController = TextEditingController();
  final FocusNode nameFocusNode = FocusNode();
  final GlobalKey<FormState> formKey = GlobalKey<FormState>();
  final ScrollController scrollController = ScrollController();

  // 회사 유형 선택값 (복수)
  List<CompanyType> selectedCompanyTypes = [CompanyType.customer];

  List<String> companyNames = [];
  List<String> filteredCompanyNames = [];
  bool showCompanyNameDropdown = false;

  // 분리된 BranchFormController 리스트로 관리
  List<BranchFormController> branchControllers = [];

  // 직책 목록 및 전화번호 접두사 목록(공통 상수)
  final List<String> positions = [
    '대표이사',
    '사장',
    '부사장',
    '전무',
    '상무',
    '이사',
    '부장',
    '차장',
    '팀장',
    '과장',
    '대리',
    '사원',
    '주임',
    '기타',
  ];
  final List<String> phonePrefixes = getCommonPhonePrefixes();

  String selectedPhonePrefix = '010';
  final List<String> phonePrefixesForMain = getCommonPhonePrefixes();

  ValueNotifier<bool> showPositionDropdownNotifier = ValueNotifier<bool>(false);
  Timer? debounceTimer;
  bool preventAutoFocus = false;
  final Map<int, bool> isNewlyAddedBranch = {};

  CompanyFormController({required this.dataService, this.companyId}) {
    _setupFocusNodes();
    _setupControllerListeners();
    // 비동기 초기화는 별도로 호출해야 함
    Future.microtask(() => _initializeAsync());
  }

  Future<void> _initializeAsync() async {
    final isEditMode = companyId != null;
    await _loadCompanyNames();
    if (isEditMode) {
      await _loadCompanyData();
    }
  }

  void dispose() {
    debounceTimer?.cancel();
    scrollController.dispose();
    showPositionDropdownNotifier.dispose();
    for (final branchController in branchControllers) {
      branchController.dispose();
    }
    nameController.dispose();
    contactNameController.dispose();
    contactPositionController.dispose();
    contactPhoneController.dispose();
    contactEmailController.dispose();
    remarkController.dispose();
    nameFocusNode.dispose();
  }

  void _setupFocusNodes() {
    nameFocusNode.addListener(() {
      if (nameFocusNode.hasFocus) {
        showCompanyNameDropdown = filteredCompanyNames.isNotEmpty;
      } else {
        showCompanyNameDropdown = false;
      }
    });
  }

  void _setupControllerListeners() {
    nameController.addListener(_onCompanyNameTextChanged);
  }

  Future<void> _loadCompanyNames() async {
    if (_useApi) {
      try {
        final companyNamesList = await _companyService.getCompanyNames();
        companyNames = companyNamesList.map((item) => item['name'] as String).toList();
      } on Failure catch (e) {
        // 오류 시 빈 목록 사용
        companyNames = [];
        debugPrint('Failed to load company names: ${e.message}');
      }
    } else {
      companyNames = dataService.getAllCompanyNames();
    }
    filteredCompanyNames = List.from(companyNames);
  }

  Future<void> _loadCompanyData() async {
    if (companyId == null) return;
    
    Company? company;
    if (_useApi) {
      try {
        company = await _companyService.getCompanyWithBranches(companyId!);
      } on Failure catch (e) {
        debugPrint('Failed to load company data: ${e.message}');
        return;
      }
    } else {
      company = dataService.getCompanyById(companyId!);
    }
    
    if (company != null) {
      nameController.text = company.name;
      companyAddress = company.address;
      selectedCompanyTypes = List.from(company.companyTypes); // 복수 유형 지원
      contactNameController.text = company.contactName ?? '';
      contactPositionController.text = company.contactPosition ?? '';
      selectedPhonePrefix = extractPhonePrefix(
        company.contactPhone ?? '',
        phonePrefixesForMain,
      );
      contactPhoneController.text = extractPhoneNumberWithoutPrefix(
        company.contactPhone ?? '',
        phonePrefixesForMain,
      );
      contactEmailController.text = company.contactEmail ?? '';
      remarkController.text = company.remark ?? '';
      // 지점 컨트롤러 생성
      branchControllers.clear();
      final branches = company.branches?.toList() ?? [];
      if (branches.isEmpty) {
        _addInitialBranch();
      } else {
        for (final branch in branches) {
          branchControllers.add(
            BranchFormController(
              branch: branch,
              positions: positions,
              phonePrefixes: phonePrefixes,
            ),
          );
        }
      }
    }
  }

  void _addInitialBranch() {
    final newBranch = Branch(
      companyId: companyId ?? 0,
      name: '본사',
      address: const Address(),
    );
    branchControllers.add(
      BranchFormController(
        branch: newBranch,
        positions: positions,
        phonePrefixes: phonePrefixes,
      ),
    );
    isNewlyAddedBranch[branchControllers.length - 1] = true;
  }

  void updateCompanyAddress(Address address) {
    companyAddress = address;
  }

  void updateBranchAddress(int index, Address address) {
    if (index >= 0 && index < branchControllers.length) {
      branchControllers[index].updateAddress(address);
    }
  }

  void _onCompanyNameTextChanged() {
    final query = nameController.text.toLowerCase();
    if (query.isEmpty) {
      filteredCompanyNames = List.from(companyNames);
    } else {
      filteredCompanyNames =
          companyNames
              .where((name) => name.toLowerCase().contains(query))
              .toList();
    }
    showCompanyNameDropdown =
        nameFocusNode.hasFocus && filteredCompanyNames.isNotEmpty;
  }

  void selectCompanyName(String name) {
    nameController.text = name;
    showCompanyNameDropdown = false;
  }

  // 지점 추가
  void addBranch() {
    final newBranch = Branch(
      companyId: companyId ?? 0,
      name: '지점  {branchControllers.length + 1}',
      address: const Address(),
    );
    branchControllers.add(
      BranchFormController(
        branch: newBranch,
        positions: positions,
        phonePrefixes: phonePrefixes,
      ),
    );
    isNewlyAddedBranch[branchControllers.length - 1] = true;
  }

  // 지점 삭제
  void removeBranch(int index) {
    if (index < 0 || index >= branchControllers.length) return;
    branchControllers[index].dispose();
    branchControllers.removeAt(index);
    isNewlyAddedBranch.remove(index);
  }

  Future<Company?> checkDuplicateCompany() async {
    if (companyId != null) return null; // 수정 모드에서는 체크하지 않음
    final name = nameController.text.trim();
    if (name.isEmpty) return null;
    
    if (_useApi) {
      try {
        // 회사명 목록을 조회하여 중복 확인
        final companies = await _companyService.getCompanies(search: name);
        // 정확히 일치하는 회사명이 있는지 확인
        for (final company in companies) {
          if (company.name.toLowerCase() == name.toLowerCase()) {
            return company;
          }
        }
        return null;
      } on Failure catch (e) {
        debugPrint('Failed to check duplicate company: ${e.message}');
        // 오류 발생 시 중복 없음으로 처리
        return null;
      }
    } else {
      return dataService.findCompanyByName(name);
    }
  }

  Future<bool> saveCompany() async {
    if (!formKey.currentState!.validate()) {
      return false;
    }
    // 저장 직전, remarkController의 값을 branch.remark에 동기화
    for (final c in branchControllers) {
      c.updateField('remark', c.remarkController.text);
    }
    final company = Company(
      id: companyId,
      name: nameController.text.trim(),
      address: companyAddress,
      contactName: contactNameController.text.trim(),
      contactPosition: contactPositionController.text.trim(),
      contactPhone: getFullPhoneNumber(
        selectedPhonePrefix,
        contactPhoneController.text.trim(),
      ),
      contactEmail: contactEmailController.text.trim(),
      remark: remarkController.text.trim(),
      branches:
          branchControllers.isEmpty
              ? null
              : branchControllers.map((c) => c.branch).toList(),
      companyTypes: List.from(selectedCompanyTypes), // 복수 유형 저장
    );
    
    if (_useApi) {
      try {
        Company savedCompany;
        if (companyId == null) {
          // 새 회사 생성
          savedCompany = await _companyService.createCompany(company);
          debugPrint('Company created successfully with ID: ${savedCompany.id}');
          
          // 지점이 있으면 별도로 생성
          if (branchControllers.isNotEmpty && savedCompany.id != null) {
            for (final branchController in branchControllers) {
              try {
                final branch = branchController.branch.copyWith(
                  companyId: savedCompany.id!,
                );
                await _companyService.createBranch(savedCompany.id!, branch);
                debugPrint('Branch created successfully: ${branch.name}');
              } catch (e) {
                debugPrint('Failed to create branch: $e');
                // 지점 생성 실패는 경고만 하고 계속 진행
              }
            }
          }
        } else {
          // 기존 회사 수정
          savedCompany = await _companyService.updateCompany(companyId!, company);
          debugPrint('Company updated successfully');
          
          // 지점 업데이트는 별도 처리 필요 (현재는 수정 시 지점 추가/삭제 미지원)
        }
        return true;
      } on Failure catch (e) {
        debugPrint('Failed to save company: ${e.message}');
        return false;
      } catch (e) {
        debugPrint('Unexpected error saving company: $e');
        return false;
      }
    } else {
      if (companyId == null) {
        dataService.addCompany(company);
      } else {
        dataService.updateCompany(company);
      }
      return true;
    }
  }

  // 지점 저장
  Future<bool> saveBranch(int branchId) async {
    if (!formKey.currentState!.validate()) {
      return false;
    }
    
    formKey.currentState!.save();
    
    // 지점 정보 생성
    final branch = Branch(
      id: branchId,
      companyId: companyId!,
      name: nameController.text.trim(),
      address: companyAddress,
      contactName: contactNameController.text.trim(),
      contactPosition: contactPositionController.text.trim(),
      contactPhone: getFullPhoneNumber(
        selectedPhonePrefix,
        contactPhoneController.text.trim(),
      ),
      contactEmail: contactEmailController.text.trim(),
      remark: remarkController.text.trim(),
    );
    
    if (_useApi) {
      try {
        // API를 사용하여 지점 업데이트
        await _companyService.updateBranch(companyId!, branchId, branch);
        return true;
      } on Failure catch (e) {
        debugPrint('Failed to save branch: ${e.message}');
        return false;
      }
    } else {
      // Mock 데이터 서비스 사용
      dataService.updateBranch(companyId!, branch);
      return true;
    }
  }

  // 회사 유형 체크박스 토글 함수
  void toggleCompanyType(CompanyType type, bool checked) {
    if (checked) {
      if (!selectedCompanyTypes.contains(type)) {
        selectedCompanyTypes.add(type);
      }
    } else {
      selectedCompanyTypes.remove(type);
      if (selectedCompanyTypes.isEmpty) {
        // 최소 1개는 선택되도록 강제
        selectedCompanyTypes.add(CompanyType.customer);
      }
    }
  }
}

// 전화번호 관련 유틸리티 메서드

// 전화번호 접두사 추출
String extractPhonePrefix(String phoneNumber, List<String> prefixes) {
  if (phoneNumber.isEmpty) return '010';

  // 하이픈 제거
  String cleanNumber = phoneNumber.replaceAll('-', '');

  // 접두사 확인
  for (String prefix in prefixes) {
    if (cleanNumber.startsWith(prefix)) {
      return prefix;
    }
  }

  return '010'; // 기본값
}

// 접두사 제외 전화번호 추출
String extractPhoneNumberWithoutPrefix(
  String phoneNumber,
  List<String> prefixes,
) {
  if (phoneNumber.isEmpty) return '';

  // 하이픈 제거
  String cleanNumber = phoneNumber.replaceAll('-', '');

  // 접두사 제거
  for (String prefix in prefixes) {
    if (cleanNumber.startsWith(prefix)) {
      return cleanNumber.substring(prefix.length);
    }
  }

  return cleanNumber;
}

// 전체 전화번호 생성 (접두사 + 번호)
String getFullPhoneNumber(String prefix, String number) {
  if (number.isEmpty) return '';

  // 하이픈 제거
  String cleanNumber = number.replaceAll('-', '');

  return '$prefix-$cleanNumber';
}

// 일반적인 전화번호 접두사 목록
List<String> getCommonPhonePrefixes() {
  return [
    '010', '011', '016', '017', '018', '019', // 휴대폰
    '02', '031', '032', '033', '041', '042', '043', '044', '051', '052', '053',
    '054', '055', '061', '062', '063', '064', // 지역번호
    '070', '080', '1588', '1566', '1544', '1644', '1661', '1599', // 기타
  ];
}